BRANDYWINE REALTY TRUST - Annual Report 2011

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2011

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 001-9106 (Brandywine Realty Trust)

000-24407 (Brandywine Operating Partnership, L.P.)

Brandywine Realty Trust

Brandywine Operating Partnership, L.P.

(Exact name of registrant as specified in its charter)

MARYLAND (Brandywine Realty Trust)	23-2413352
DELAWARE (Brandywine Operating Partnership L.P.)	23-2862640
(State or other jurisdiction of Incorporation or organization)	(I.R.S. Employer Identification No.)
555 East Lancaster Avenue
Radnor, Pennsylvania	19087
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (610) 325-5600

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Shares of Beneficial Interest,	New York Stock Exchange
par value $0.01 per share
(Brandywine Realty Trust)
7.50% Series C Cumulative Redeemable Preferred	New York Stock Exchange
Shares of Beneficial Interest
par value $0.01 per share
(Brandywine Realty Trust)
7.375% Series D Cumulative Redeemable Preferred	New York Stock Exchange
Shares of Beneficial Interest
par value $0.01 per share
(Brandywine Realty Trust)

Securities registered pursuant to Section 12(g) of the Act:

Units of General Partnership Interest (Brandywine Operating Partnership, L.P.)

(Title of class)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Brandywine Realty Trust	Yes þ No o
Brandywine Operating Partnership, L.P.	Yes o No þ

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

Brandywine Realty Trust	Yes o No þ
Brandywine Operating Partnership, L.P.	Yes o No þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Brandywine Realty Trust	Yes þ No o
Brandywine Operating Partnership, L.P.	Yes þ No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Brandywine Realty Trust	Yes þ No o
Brandywine Operating Partnership, L.P.	Yes þ No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. þ

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act (Check one):

Brandywine Realty Trust: Large accelerated filer þ Accelerated filer o Non-accelerated filer o Smaller reporting company o

Brandywine Operating Partnership, L.P.: Large accelerated filer o Accelerated filer þ Non-accelerated filer o Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Brandywine Realty Trust	Yes o No þ
Brandywine Operating Partnership, L.P.	Yes o No þ

As of June 30, 2011 , the aggregate market value of the Common Shares of Beneficial Interest held by non-affiliates of Brandywine Realty Trust was $1,550,583,606 based upon the last reported sale price of $11.59 per share on the New York Stock Exchange on June 30, 2011 . An aggregate of 142,728,273 Common Shares of Beneficial Interest were outstanding as of February 23, 2012 .

As of June 30, 2011 , the aggregate market value of the 8,897,204 common units of limited partnership (“Units”) held by non-affiliates of Brandywine Operating Partnership, L.P. was $103,118,592 million based upon the last reported sale price of $11.59 per share on the New York Stock Exchange on June 30, 2011 of the Common Shares of Beneficial Interest of Brandywine Realty Trust, the sole general partner of Brandywine Operating Partnership, L.P. (For this computation, the Registrant has excluded the market value of all Units beneficially owned by Brandywine Realty Trust.)

Documents Incorporated By Reference

Portions of the proxy statement for the 2011 Annual Meeting of Shareholders of Brandywine Realty Trust are incorporated by reference into Part III of this Form 10-K.

The exhibit index as required by Item 601(a) of Regulation S-K is included in Item 15 of Part IV of this report.

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EXPLANATORY NOTE

This report combines the annual reports on Form 10-K for the year ended December 31, 2011 of Brandywine Realty Trust (the “Parent Company”) and Brandywine Operating Partnership, L.P. (the “Operating Partnership”). The Parent Company is a Maryland real estate investment trust, or REIT that owns its assets and conducts its operations through the Operating Partnership, a Delaware limited partnership, and subsidiaries of the Operating Partnership. The Parent Company, the Operating Partnership and their consolidated subsidiaries are collectively referred to in this report as the “Company”. In addition, terms such as “we”, “us”, or “our” used in this report may refer to the Company, the Parent Company, or the Operating Partnership.

The Parent Company is the sole general partner of the Operating Partnership and as of December 31, 2011 , owned a 98.1% interest in the Operating Partnership. The remaining 1.9% interest consists of common units of limited partnership interest issued by the Operating Partnership to third parties in exchange for contributions of properties to the Operating Partnership. As the sole general partner of the Operating Partnership, the Parent Company has full and complete authority over the Operating Partnership’s day-to-day operations and management.

The Company believes that combining the annual reports on Form 10-K of the Parent Company and the Operating Partnership into a single report will result in the following benefits:

• facilitate a better understanding by the investors of the Parent Company and the Operating Partnership by enabling them to view the business as a whole in the same manner as management views and operates the business;

• remove duplicative disclosures and provide a more straightforward presentation in light of the fact that a substantial portion of the disclosure applies to both the Parent Company and the Operating Partnership; and

• create time and cost efficiencies through the preparation of one combined report instead of two separate reports.

Management operates the Parent Company and the Operating Partnership as one enterprise. The management of the Parent Company consists of the same members as the management of the Operating Partnership. These members are officers of both the Parent Company and of the Operating Partnership.

There are few differences between the Parent Company and the Operating Partnership, which are reflected in the footnote disclosures in this report. The Company believes it is important to understand the differences between the Parent Company and the Operating Partnership in the context of how these entities operate as an interrelated consolidated company. The Parent Company is a REIT, whose only material asset is its ownership of the partnership interests of the Operating Partnership. As a result, the Parent Company does not conduct business itself, other than acting as the sole general partner of the Operating Partnership, issuing public equity from time to time and guaranteeing the debt obligations of the Operating Partnership. The Operating Partnership holds substantially all the assets of the Company and directly or indirectly holds the ownership interests in the Company’s real estate ventures. The Operating Partnership conducts the operations of the Company’s business and is structured as a partnership with no publicly traded equity. Except for net proceeds from equity issuances by the Parent Company, which are contributed to the Operating Partnership in exchange for partnership units, the Operating Partnership generates the capital required by the Company’s business through the Operating Partnership’s operations, by the Operating Partnership’s direct or indirect incurrence of indebtedness or through the issuance of partnership units of the Operating Partnership or equity interests in subsidiaries of the Operating Partnership.

The equity and non-controlling interests in the Parent Company and the Operating Partnership’s equity are the main areas of difference between the consolidated financial statements of the Parent Company and the Operating Partnership. The common units of limited partnership interest in the Operating Partnership are accounted for as partners’ equity in the Operating Partnership’s financial statements while the common units of limited partnership interests held by parties other than the Parent Company are presented as non-controlling interests in the Parent Company’s financial statements. The differences between the Parent Company and the Operating Partnership’s equity relate to the differences in the equity issued at the Parent Company and Operating Partnership levels.

To help investors understand the significant differences between the Parent Company and the Operating Partnership, this report presents the following as separate notes or sections for each of the Parent Company and the Operating Partnership:

• Consolidated Financial Statements;

• Parent Company’s and Operating Partnership’s Equity

• Liquidity and Capital Resources in the Management’s Discussion and Analysis of Financial Condition and Results of Operations.

This report also includes separate Item 9A. (Controls and Procedures) disclosures and separate Exhibit 31 and 32 certifications for each of the Parent Company and the Operating Partnership in order to establish that the Chief Executive Officer and the Chief Financial Officer of each entity have made the requisite certifications and that the Parent Company and Operating Partnership are

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compliant with Rule 13a-15 or Rule 15d-15 of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. § 1350.

In order to highlight the differences between the Parent Company and the Operating Partnership, the separate sections in this report for the Parent Company and the Operating Partnership specifically refer to the Parent Company and the Operating Partnership. In the sections that combine disclosures of the Parent Company and the Operating Partnership, this report refers to such disclosures as those of the Company. Although the Operating Partnership is generally the entity that directly or indirectly enters into contracts and real estate ventures and holds assets and debt, reference to the Company is appropriate because the business is one enterprise and the Parent Company operates the business through the Operating Partnership.

As general partner with control of the Operating Partnership, the Parent Company consolidates the Operating Partnership for financial reporting purposes, and the Parent Company does not have significant assets other than its investment in the Operating Partnership. Therefore, the assets and liabilities of the Parent Company and the Operating Partnership are the same on their respective financial statements. The separate discussions of the Parent Company and the Operating Partnership in this report should be read in conjunction with each other to understand the results of the Company operations on a consolidated basis and how management operates the Company.

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TABLE OF CONTENTS

FORM 10-K

	Page
PART I
Item 1. Business	7
Item 1A. Risk Factors	14
Item 1B. Unresolved Staff Comments	24
Item 2. Properties	24
Item 3. Legal Proceedings	34
Item 4. Mine Safety Disclosures	34
PART II
Item 5. Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities	35
Item 6. Selected Financial Data	37
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations	40
Item 7A. Quantitative and Qualitative Disclosures About Market Risk	66
Item 8. Financial Statements and Supplementary Data	66
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	66
Item 9A. Controls and Procedures	66
Item 9B. Other Information	67
PART III
Item 10. Directors, Executive Officers and Corporate Governance	68
Item 11. Executive Compensation	68
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters	68
Item 13. Certain Relationships and Related Transactions, and Director Independence	68
Item 14. Principal Accountant Fees and Services	68
PART IV
Item 15. Exhibits and Financial Statement Schedules	69
SIGNATURES	78
Exhibit 3.1.27
Exhibit 10.4
Exhibit 10.5
Exhibit 10.6
Exhibit 10.7
Exhibit 12.1
Exhibit 12.2
Exhibit 21
Exhibit 23.1
Exhibit 23.2
Exhibit 31.1
Exhibit 31.2
Exhibit 31.3
Exhibit 31.4
Exhibit 32.1
Exhibit 32.2
Exhibit 32.3
Exhibit 32.4
Exhibit 99.1
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT

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Filing Format

This combined Form 10-K is being filed separately by Brandywine Realty Trust (the “Parent Company”) and Brandywine Operating Partnership, L.P. (the “Operating Partnership”).

Forward-Looking Statements

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. This Annual Report on Form 10-K and other materials filed by us with the SEC (as well as information included in oral or other written statements made by us) contain statements that are forward-looking, including statements relating to business and real estate development activities, acquisitions, dispositions, future capital expenditures, financing sources, governmental regulation (including environmental regulation) and competition. We intend such forward-looking statements to be covered by the safe-harbor provisions of the 1995 Act. The words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “will,” “should” and similar expressions, as they relate to us, are intended to identify forward-looking statements. Although we believe that the expectations reflected in such forward-looking statements are based on reasonable assumptions, we can give no assurance that our expectations will be achieved. As forward-looking statements, these statements involve important risks, uncertainties and other factors that could cause actual results to differ materially from the expected results and, accordingly, such results may differ from those expressed in any forward-looking statements made by us or on our behalf. Factors that could cause actual results to differ materially from our expectations include, but are not limited to:

• the continuing impact of the global economic slowdown, which is having and may continue to have a negative effect on the following, among other things:

• the fundamentals of our business, including overall market occupancy, demand for office space and rental rates;

• the financial condition of our tenants, many of which are financial, legal and other professional firms, our lenders, counterparties to our derivative financial instruments and institutions that hold our cash balances and short-term investments, which may expose us to increased risks of default by these parties;

• availability of financing on attractive terms or at all, which may adversely impact our future interest expense and our ability to pursue acquisition and development opportunities and refinance existing debt; and

• a decline in real estate asset valuations, which may limit our ability to dispose of assets at attractive prices or obtain or maintain debt financing secured by our properties or on an unsecured basis.

• changes in local real estate conditions (including changes in rental rates and the number of properties that compete with our properties);

• changes in the economic conditions affecting industries in which our principal tenants compete;

• the unavailability of equity and debt financing;

• our failure to lease unoccupied space in accordance with our projections;

• our failure to re-lease occupied space upon expiration of leases;

• tenant defaults and the bankruptcy of major tenants;

• increases in interest rates;

• failure of interest rate hedging contracts to perform as expected and the effectiveness of such arrangements;

• failure of acquisitions to perform as expected;

• unanticipated costs associated with the acquisition, integration and operation of our acquisitions;

• unanticipated costs to complete, lease-up and operate our developments and redevelopments;

• unanticipated costs associated with land development, including building moratoriums and inability to obtain necessary zoning, land-use, building, occupancy and other required governmental approvals, construction cost increases or overruns and construction delays;

• impairment charges;

• increased costs for, or lack of availability of, adequate insurance, including for terrorist acts;

• actual or threatened terrorist attacks;

• demand for tenant services beyond those traditionally provided by landlords;

• liability under environmental or other laws;

• failure or bankruptcy of real estate venture partners;

• inability of real estate venture partners to fund venture obligations;

• failure of dispositions to close in a timely manner;

• failure of buyers of our properties to comply with terms of their financing agreements to us;

• earthquakes and other natural disasters;

• the unforeseen impact of climate change and compliance costs relating to laws and regulations governing climate change;

• risks associated with federal, state and local tax audits;

• complex regulations relating to our status as a REIT and the adverse consequences of our failure to qualify as a REIT;

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and

• the impact of newly adopted accounting principles on our accounting policies and on period-to-period comparisons of financial results.

Given these uncertainties, and the other risks identified in the “Risk Factors” section and elsewhere in this Annual Report on Form 10-K, we caution readers not to place undue reliance on forward-looking statements. We assume no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.

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PART I

ITEM 1. Business

Introduction

We are a self-administered and self-managed REIT that provides leasing, property management, development, redevelopment, acquisition and other tenant-related services for a portfolio of office, mixed-use and industrial properties. As of December 31, 2011 , we owned and consolidated 232 properties (collectively, the “Properties”) containing an aggregate of approximately 25.2 million net rentable square feet. The Properties include 207 office properties, 20 industrial properties and five mixed-use properties. As of December 31, 2011 , we also owned interests in 18 unconsolidated real estate ventures (collectively, the “Real Estate Ventures”) that own properties that contain approximately 6.7 million net rentable square feet. In addition, as of December 31, 2011 , we owned 444 acres of undeveloped land, and held options to purchase approximately 52 additional acres of undeveloped land. The Properties and the properties owned by the Real Estate Ventures are located in or near Philadelphia, Pennsylvania; Metropolitan Washington, D.C.; Southern and Central New Jersey; Richmond, Virginia; Wilmington, Delaware; Austin, Texas and Oakland, Concord, Carlsbad and Rancho Bernardo, California. In addition to managing properties that we own, as of December 31, 2011 , we were managing approximately 7.4 million square feet of office and industrial properties for third parties and Real Estate Ventures. Unless otherwise indicated, all references to square feet represent net rentable area.

Organization

The Parent Company was organized and commenced its operations in 1986 as a Maryland REIT. The Parent Company owns its assets and conducts its operations through the Operating Partnership and subsidiaries of the Operating Partnership. The Operating Partnership was formed in 1996 as a Delaware limited partnership. The Parent Company controls the Operating Partnership as its sole general partner. As of December 31, 2011 , the Parent Company owned a 98.1% interest in the Operating Partnership. The remaining 1.9% interest in the Operating Partnership consists of common units of limited partnership interest issued to the holders in exchange for contributions of properties to the Operating Partnership. Our structure as an “UPREIT” is designed, in part, to permit persons contributing properties to us to defer some or all of the tax liability they might otherwise incur in a sale of properties.Our executive offices are located at 555 East Lancaster Avenue, Suite 100, Radnor, Pennsylvania 19087 and our telephone number is (610) 325-5600. We have offices in Philadelphia, Pennsylvania; Falls Church, Virginia; Mount Laurel, New Jersey; Richmond, Virginia; Austin, Texas; and Carlsbad, California. We have an internet website at www.brandywinerealty.com. We are not incorporating by reference into this Annual Report on Form 10-K any material from our website. The reference to our website is an inactive textual reference to the uniform resource locator (URL) and is for your reference only.

2011 Transactions

Real Estate Acquisitions/Dispositions

On December 20, 2011 , we formed a joint venture, Brandywine - AI Venture LLC (the "Venture"), with Current Creek Investments, LLC ("Current Creek"), a wholly-owned subsidiary of Allstate Insurance Company. We and Current Creek each own a 50% interest in the Venture. The Venture owns three office properties, which we contributed to the Venture upon its formation. The contributed office properties contain an aggregate of 587,317 net rentable square feet and consist of 3130 and 3141 Fairview Park Drive, both located in Falls Church, Virginia, and 7101 Wisconsin Avenue located in Bethesda, Maryland. As of December 31, 2011 , these properties were 84.5% , 82.4% and 99.4% leased, respectively. Concurrent with our contribution of the three properties to the Venture, Current Creek contributed approximately $32.2 million (net of closing costs and customary prorations) to the capital of the Venture and the Venture closed on non-recourse fixed rate mortgage loans in the aggregate amount of $90.0 million , secured by mortgages on each of the three properties. The mortgage loans have a weighted-average maturity of 7.4 years and bear interest at a weighted average rate of 4.4% . We transferred the properties to the Venture based on a $156.0 million valuation. Upon formation of the Venture, we received $120.1 million of aggregate proceeds from these transactions net of $2.9 million of transaction and venture formation costs. We used the net proceeds to reduce outstanding indebtedness under our unsecured revolving credit facility and for general corporate purposes. We were engaged by the Venture to perform property management and leasing services at market rates.

On November 22, 2011 , we sold 442 Creamery Way, a 104,500 net rentable square feet office property located in Exton, PA, for a sales price of $7.4 million . The property was 100.0% occupied as of the date of sale.

On October 28, 2011 , we sold two office properties (Five Greentree and Lake Center II) containing a total of 206,243 net rentable square feet located in Marlton, NJ for an aggregate sales price of $22.8 million . Five Greentree and Lake Center II were 92.2% and 47.8% occupied, respectively, as of the date of sale.

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On October 14, 2011 , we sold an undeveloped parcel of land in Dallas, Texas containing six acres of land for $0.6 million .

On August 12, 2011 , we acquired an office property located in Philadelphia, Pennsylvania, together with related ground tenancy rights under a long-term ground lease, through the foreclosure of an $18.8 million note receivable secured by the property. We purchased the note receivable from a third party on August 2, 2011 , which was funded through an advance under our unsecured revolving Credit Facility, and with available corporate funds. The office property contains 192,707 of net rentable square feet and was 57.2% leased as of December 31, 2011 .

On June 27, 2011 , we sold Three Greentree Center, a 69,300 net rentable square feet office property located in Marlton, New Jersey, for a sales price of $5.9 million . The property was 13.9% occupied as of the date of sale.

On March 28, 2011 , we acquired two office properties containing a total of 126,496 net rentable square feet in Glen Allen, Virginia known as Overlook I and II for $12.6 million . The acquired properties were 100% leased as of December 31, 2011 . We funded the acquisition through an advance under our unsecured revolving credit facility and with available corporate funds.

On January 20, 2011 , we acquired a one acre parcel of land in Philadelphia, Pennsylvania for $9.3 million . We funded the cost of this acquisition through an advance under our unsecured credit facility and with available corporate funds. We thereafter contributed the acquired property into a newly formed real estate venture, known as Brandywine 1919 Market Ventures ("1919 Ventures"), in return for a 50% general partner interest in the venture , with the other partner contributing cash for general partner interest. 1919 Ventures is evaluating a mixed-use development at the parcel.

Developments and Redevelopments

During 2011 , we placed in service a 220 space garage property that we redeveloped. At December 31, 2011 , we were not proceeding on any development or redevelopment activity, although we were, in the ordinary course of business, evaluating development and redevelopment opportunities.

Unsecured Debt Activity and New Credit Facility

During the year ended December 31, 2011 , we repurchased $106.2 million of our unsecured Notes as summarized in the table below (excluding accrued interest, in thousands):

Notes	Repurchase Amount	Principal	Loss	Deferred Financing Amortization
2011 3.875% Notes	$ 59,835	$ 59,835	$ —	$ —
2012 5.750% Notes	24,749	23,709	868	32
2015 7.500% Notes	25,140	22,671	2,396	120
	$ 109,724	$ 106,215	$ 3,264	$ 152

We funded these repurchases from a combination of proceeds from asset sales, cash flow from operations and borrowings under our Credit Facility (as defined below).

We use borrowings under our Credit Facility for general business purposes, including the acquisition, development and redevelopment of properties and the repayment of other debt.

On December 15, 2011 , we entered into binding agreements for lender commitments related to a new $600.0 million four-year unsecured revolving credit facility (the "New Credit Facility") and three unsecured term loans in the aggregate amount of $600.0 million (collectively, the “New Term Loans”), consisting of a $150.0 million three-year loan, a $250.0 million four-year loan and a $200.0 million seven-year loan. We closed on the New Credit Facility and New Term Loans on February 1, 2012 and used the initial advances under the New Term Loans to repay all balances outstanding under, and concurrently terminate, our then existing $600.0 million unsecured revolving credit facility (the "Prior Credit Facility") and $183.0 million unsecured term loan (the "Prior Term Loan"), each of which had been scheduled to mature on June 29, 2012. When we use the term "Credit Facility" in this Form 10-K, we are referring to the Prior Credit Facility (for events and time periods prior to February 1, 2012) and to the New Credit Facility (for events and time period on or after February 1, 2012).

We have the option to increase the amounts available to be advanced under the New Credit Facility, the $150.0 million three-year term loan, and the $250.0 million four-year term loan by an aggregate of $200.0 million , subject to customary conditions and limitations, by obtaining additional commitments from the current lenders and other financial institutions. We also have the option to extend the maturity dates of each of the New Credit Facility, the $150.0 million three-year term loan and the $250.0 million four-year term loan by one year , subject to payment of an extension fee and other customary conditions and limitations. We can

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prepay the $150.0 million three-year term and the $250.0 million four-year term loans at any time without penalty. The $200.0 million seven-year term loan is subject to a declining prepayment penalty ranging from 3.00% a year after closing, 2.00% after two years, 1.00% after three years and without penalty thereafter.

The spread to LIBOR for LIBOR-based loans under the New Credit Facility and New Term Loans will depend on our unsecured senior debt credit rating. Based on our current credit rating, the spread for such loans will be 150 , 175 , 175 and 190 basis points under the New Credit Facility, the $150.0 million three-year term loan, the $250.0 million four-year term loan and the $200.0 million seven-year term loan, respectively. At our option, loans under the New Credit Facility and New Term Loans may also bear interest at a per annum floating rate equal to the higher of the prime rate or the federal funds rate plus 0.50% per annum. The New Credit Facility contains a competitive bid option that allows banks that are part of the lender consortium to bid to make loans to us at a reduced rate. We executed hedging transactions that fix the rate on the $200.0 million seven-year term loan at a 3.623% average for its full term, the rate on $300.0 million of notional principal for the other loans at rates in a range of 2.470% to 2.910% for periods of three to five years. All hedges commenced on February 1, 2012 and the rates are inclusive of the LIBOR spread based on the current investment grade rating.

The New Credit Facility and New Term Loans, consistent with the Prior Credit Facility and Prior Term Loan, contain financial and operating covenants and restrictions, including covenants that relate to our incurrence of additional debt; granting liens; consummation of mergers and consolidations; the disposition of assets and interests in subsidiaries; the making of loans and investments; and the payment of dividends. The restriction on dividends permits us to pay dividends to the greater of (i) an amount required for us to retain our qualification as a REIT and (ii) 95% of our funds from operations. The New Credit Facility and New Term Loans include financial covenants that require us to maintain an interest coverage ratio, a fixed charge coverage ratio, an unsecured debt ratio and an unencumbered cash flow ratio above specified levels; to maintain a minimum net worth above an amount determined on a specified formula; and to maintain a leverage ratio and a secured debt ratio below certain maximum levels. Another financial covenant limits the ratio of our unsecured debt to the value of our unencumbered properties.

We were in compliance with all financial and non-financial covenants under the Credit Facility and our credit agreements as of December 31, 2011. We continuously monitor our compliance with all covenants. Certain covenants restrict our ability to obtain alternative sources of capital. While we believe that we will remain in compliance with our covenants, a continued slow-down in the economy and continued decrease in availability of debt financing could result in non-compliance with covenants.

On April 5, 2011, we sold $325.0 million of our 4.95% Guaranteed Notes Due April 15, 2018 (the “2018 Notes”). The net proceeds from the sale of the 2018 Notes, after the underwriters’ discount and offering expenses, amounted to $318.9 million , and were used to reduce outstanding borrowings under our Credit Facility and for general corporate purposes.

Secured Debt Activity

During the year ended December 31, 2011 , we prepaid an aggregate of $210.5 million of our secured debt without penalty using a combination of proceeds from asset sales, cash flow from operations and borrowings under the Credit Facility. The prepayments are summarized as follows (excluding accrued interest, in thousands):

Mortgage Note	Payment Date	Amount
Concord Airport Plaza	Sep-11	$ 34,494
One Logan Square	Jul-11	60,000
Midlantic, Lenox, DCCI	Jun-11	56,514
Research Office Center	Jun-11	39,145
Arboretum I, II, III, & V	Apr-11	20,386
Total		$ 210,539

Additional Financing Activity

The Parent Company uses its continuous equity offering program (the “Offering Program”), under which it may sell up to an aggregate amount of 15,000,000 common shares until March 10, 2013. During the year ended December 31, 2011 , the Parent Company sold 679,285 shares under this program at an average sales price of $12.18 per share resulting in net proceeds of $8.0 million . The Parent Company contributed the net proceeds from the sale of its shares to the Operating Partnership in exchange for the issuance of 679,285 common partnership units to the Parent Company. The Operating Partnership used the net proceeds contributed by the Parent Company to repay balances on our Credit Facility and for general corporate purposes. From the inception of the Offering Program in March 2010 through December 31, 2011 , the Parent Company has sold 6,421,553 common shares under this program, leaving in 8,578,447 shares available for sale.

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Business Objective and Strategies for Growth

Our business objective is to deploy capital effectively to maximize our return on investment and thereby maximize our total return to shareholders. To accomplish this objective we seek to:

• maximize cash flow through leasing strategies designed to capture rental growth as rental rates increase and as leases are renewed;

• attain a high tenant retention rate by providing a full array of property management and maintenance services and tenant service programs responsive to the varying needs of our diverse tenant base;

• form joint venture opportunities with high-quality partners having attractive real estate holdings or significant financial resources;

• utilize our reputation as a full-service real estate development and management organization to identify acquisition and development opportunities that will expand our business and create long-term value; and

• increase the economic diversification of our tenant base while maximizing economies of scale.

We also consider the following to be important objectives:

• to acquire and develop high-quality office and industrial properties at attractive yields in markets that we expect will experience economic growth and where we can achieve operating efficiencies;

• to deploy our land inventory for development of high-quality office and industrial properties; and

• to capitalize on our redevelopment expertise to selectively develop, redevelop and reposition properties in desirable locations.

We expect to concentrate our real estate activities in markets where we believe that:

• current and projected market rents and absorption statistics justify construction activity;

• we can maximize market penetration by accumulating a critical mass of properties and thereby enhance operating efficiencies;

• barriers to entry (such as zoning restrictions, utility availability, infrastructure limitations, development moratoriums and limited developable land) will create supply constraints on office and industrial space; and

• there is potential for economic growth, particularly job growth and industry diversification.

Operating Strategy

In this current economic environment, we expect to continue to operate in markets where we have a concentration advantage due to economies of scale. We believe that where possible, it is best to operate with a strong base of properties in order to benefit from the personnel allocation and the market strength associated with managing several properties in the same market. However, we intend to selectively dispose of properties and redeploy capital if we determine a property cannot meet our long term earnings growth expectations. We believe that recycling capital is an important aspect of maintaining the overall quality of our portfolio.

Our broader strategy remains focused on continuing to enhance liquidity and strengthen our balance sheet through capital retention, targeted sales activity and management of our existing and prospective liabilities.

In the long term, we believe that we are well positioned in our current markets and have the expertise to take advantage of both development and acquisition opportunities, as warranted by market and economic conditions, in new markets that have healthy long-term fundamentals and strong growth projections. This capability, combined with what we believe is a conservative financial structure, should allow us to achieve disciplined growth. These abilities are integral to our strategy of having a geographically and physically diverse portfolio of assets, which will meet the needs of our tenants.

We use experienced on site construction superintendents, operating under the supervision of project managers and senior management, to control the construction process and mitigate the various risks associated with real estate development.

In order to fund developments, redevelopments and acquisitions, as well as refurbish and improve existing Properties, we must use excess cash from operations after satisfying our dividend and other requirements. The availability of funds for new investments and maintenance of existing Properties depends in large measure on capital markets and liquidity factors over which we can exert little control. Past events, including failures and near failures of a number of large financial service companies, have made the capital markets volatile. In addition, downgrades of our public debt ratings by Standard & Poor’s and Moody’s Investor Service could increase our cost of capital.

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Policies With Respect To Certain Activities

The following is a discussion of our investment, financing and other policies. These policies have been determined by our Board of Trustees and our Board may revise these policies without a vote of shareholders.

Investments in Real Estate or Interests in Real Estate

We may develop, purchase or lease income-producing properties for long-term investment, expand and improve the properties presently owned or other properties purchased, or sell such properties, in whole or in part, as circumstances warrant. Although there is no limitation on the types of development activities that we may undertake, we expect that our development activities will meet current market demand and will generally be on a build-to-suit basis for particular tenants where a significant portion of the building is pre-leased before construction begins. We continue to participate with other entities in property ownership through existing joint ventures or other types of co-ownership. Our equity investments may be subject to existing or future mortgage financing and other indebtedness that will have priority over our equity investments.

Securities of or Interests in Entities Primarily Engaged in Real Estate Activities and Other Issuers

Subject to the percentage of ownership limitations and gross income tests necessary for REIT qualification, we may invest in securities of other REITs, other entities engaged in real estate activities or securities of other issuers. We may enter into joint ventures or partnerships for the purpose of obtaining an equity interest in a particular property. We do not currently intend to invest in the securities of other issuers except in connection with joint ventures or acquisitions of indirect interests in properties.

Investments in Real Estate Mortgages

While our current portfolio consists of, and our business objectives emphasize, equity investments in commercial real estate, we may, at the discretion of management or our Board of Trustees, invest in other types of equity real estate investments, mortgages and other real estate interests. We do not presently intend to invest to a significant extent in mortgages or deeds of trust, but may invest in participating mortgages if we conclude that we may benefit from the cash flow or any appreciation in the value of the property securing a mortgage. From time to time, we provide seller financing to buyers of our properties. We do this when the buyer requires additional funds for the purchase and provision of seller financing will be beneficial to us and the buyer compared to a mortgage loan from a third party lender.

Dispositions

Our disposition of properties is based upon management’s periodic review of our portfolio and the determination by management or our Board of Trustees that a disposition would be in our best interests. We intend to use selective dispositions to fund our capital and refinancing needs.

Financing Policies

A primary objective of our financing policy has been to manage our financial position to allow us to raise capital from a variety of sources at competitive rates. Our mortgages, credit facilities and unsecured debt securities contain restrictions on our ability to incur indebtedness. Our charter documents do not limit the indebtedness that we may incur. Our financing strategy is to maintain a strong and flexible financial position by limiting our debt to a prudent level and minimizing our variable interest rate exposure. We intend to finance future growth and future maturing debt with the most advantageous source of capital then available to us. These sources may include selling common or preferred equity and debt securities sold through public offerings or private placements, utilizing availability under the Credit Facility or incurring additional indebtedness through secured or unsecured borrowings. To qualify as a REIT, we must distribute to our shareholders each year at least ninety percent of our net taxable income, excluding any net capital gain. This distribution requirement limits our ability to fund future capital needs, including for acquisitions and developments, from income from operations. Therefore, we expect to continue to rely on third party sources of capital to fund future capital needs.

Working Capital Reserves

We maintain working capital reserves and access to borrowings in amounts that our management determines to be adequate to meet our normal contingencies.

Policies with Respect to Other Activities

We expect to issue additional common and preferred equity in the future and may authorize our Operating Partnership to issue additional common and preferred units of limited partnership interest, including to persons who contribute their interests in

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properties to us in exchange for such units. We have not engaged in trading, underwriting or agency distribution or sale of securities of unaffiliated issuers and we do not intend to do so. We intend to make investments consistent with our qualification as a REIT, unless because of circumstances or changes in the Internal Revenue Code of 1986, as amended (or the Treasury Regulations), our Board of Trustees determines that it is no longer in our best interests to qualify as a REIT. We may make loans to third parties, including to joint ventures in which we participate and to buyers of our real estate. We intend to make investments in such a way that we will not be treated as an investment company under the Investment Company Act of 1940.

Management Activities

We provide third-party real estate management services primarily through wholly-owned subsidiaries (collectively, the “Management Companies”). As of December 31, 2011 , the Management Companies were managing properties containing an aggregate of approximately 32.6 million net rentable square feet, of which approximately 25.2 million net rentable square feet related to Properties owned by us and approximately 7.4 million net rentable square feet related to properties owned by third parties and unconsolidated Real Estate Ventures.

Geographic Segments

As of December 31, 2011 , we were managing our portfolio within seven segments: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (“CBD”), (3) Metropolitan Washington D.C, (4) New Jersey/Delaware, (5) Richmond, Virginia, (6) Austin, Texas and (7) California. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Philadelphia CBD segment includes properties located in the City of Philadelphia in Pennsylvania. The Metropolitan Washington, D.C. segment includes properties in Northern Virginia and suburban Maryland. The New Jersey/Delaware segment includes properties in Burlington, Camden and Mercer counties and in New Castle county in the state of Delaware. The Richmond, Virginia segment includes properties primarily in Albemarle, Chesterfield, Goochland and Henrico counties and Durham, North Carolina. The Austin, Texas segment includes properties in Austin. The California segment includes properties in Oakland, Concord, Carlsbad and Rancho Bernardo. Our corporate group is responsible for cash and investment management, development of certain real estate properties during the construction period, and certain other general support functions.

Competition

The real estate business is highly competitive. Our Properties compete for tenants with similar properties primarily on the basis of location, total occupancy costs (including base rent and operating expenses), services provided, and the design and condition of the improvements. We also face competition when attempting to acquire or develop real estate, including competition from domestic and foreign financial institutions, other REITs, life insurance companies, pension funds, partnerships and individual investors. Additionally, our ability to compete depends upon trends in the economies of our markets, investment alternatives, financial condition and operating results of current and prospective tenants, availability and cost of capital, construction and renovation costs, land availability, our ability to obtain necessary construction approvals, taxes, governmental regulations, legislation and population trends.

Insurance

We maintain commercial general liability and “all risk” property insurance on our properties. We intend to obtain similar coverage for properties we acquire in the future. There are types of losses, generally of a catastrophic nature, such as losses from war, terrorism, environmental issues, floods, hurricanes and earthquakes that are subject to limitations in certain areas or which may be uninsurable risks. We exercise our discretion in determining amounts, coverage limits and deductibility provisions of insurance, with a view to maintaining appropriate insurance on our investments at a reasonable cost and on suitable terms. If we suffer a substantial loss, our insurance coverage may not be sufficient to pay the full current market value or current replacement cost of our lost investment. Inflation, changes in building codes and ordinances, environmental considerations and other factors also might make it impractical to use insurance proceeds to fully replace or restore a property after it has been damaged or destroyed.

Employees

As of December 31, 2011 , we had 402 full-time employees, including 20 union employees.

Government Regulations Relating to the Environment

Many laws and governmental regulations relating to the environment apply to us and changes in these laws and regulations, or their interpretation by agencies and the courts, occur frequently and may adversely affect us.

Existing conditions at some of our Properties . Independent environmental consultants have conducted Phase I or similar

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environmental site assessments on our Properties. We generally obtain these assessments prior to the acquisition of a Property and may later update them as required for subsequent financing of the property or as requested by a tenant. Site assessments are generally performed to ASTM standards then existing for Phase I site assessments, and typically include a historical review, a public records review, a visual inspection of the surveyed site, and the issuance of a written report. These assessments do not generally include any soil samplings or subsurface investigations. Depending on the age of the property, the Phase I may have included an assessment of asbestos-containing materials. For properties where asbestos-containing materials were identified or suspected, an operations and maintenance plan was generally prepared and implemented. See Note 2 to our consolidated financial statements for our evaluation in accordance with the accounting standard governing asset retirement obligations.

Historical operations at or near some of our properties, including the operation of underground storage tanks, may have caused soil or groundwater contamination. We are not aware of any such condition, liability or concern by any other means that would give rise to material, uninsured environmental liability. However, the assessments may have failed to reveal all environmental conditions, liabilities or compliance concerns; there may be material environmental conditions, liabilities or compliance concerns that a review failed to detect or which arose at a property after the review was completed; future laws, ordinances or regulations may impose material additional environmental liability; and current environmental conditions at our Properties may be affected in the future by tenants, third parties or the condition of land or operations near our Properties, such as the presence of underground storage tanks. We cannot be certain that costs of future environmental compliance will not affect our ability to make distributions to our shareholders.

Use of hazardous materials by some of our tenants. Some of our tenants handle hazardous substances and wastes on our properties as part of their routine operations. Environmental laws and regulations may subject these tenants, and potentially us, to liability resulting from such activities. We generally require our tenants, in their leases, to comply with these environmental laws and regulations and to indemnify us for any related liabilities. These tenants are primarily involved in the life sciences and the light industrial and warehouse businesses. We are not aware of any material noncompliance, liability or claim relating to hazardous or toxic substances or petroleum products in connection with any of our Properties, and we do not believe that on-going activities by our tenants will have a material adverse effect on our operations.

Costs related to government regulation and private litigation over environmental matters . Under environmental laws and regulations, we may be liable for the costs of removal, remediation or disposal of hazardous or toxic substances present or released on our Properties. These laws could impose liability without regard to whether we are responsible for, or knew of, the presence or release of the hazardous materials. Government investigations and remediation actions may entail substantial costs and the presence or release of hazardous substances on a property could result in governmental cleanup actions or personal injury or similar claims by private plaintiffs.

Potential environmental liabilities may exceed our environmental insurance coverage limits. We carry what we believe to be sufficient environmental insurance to cover potential liability for soil and groundwater contamination, mold impact, and the presence of asbestos-containing materials at the affected sites identified in our environmental site assessments. Our insurance policies are subject to conditions, qualifications and limitations. Therefore, we cannot provide any assurance that our insurance coverage will be sufficient to cover all liabilities for losses.

Potential environmental liabilities may adversely impact our ability to use or sell assets . The presence of contamination or the failure to remediate contamination may impair our ability to sell or lease real estate or to borrow using the real estate as collateral.

Other

We do not have any foreign operations and our business is not seasonal. Our operations are not dependent on a single tenant or a few tenants and no single tenant accounted for more than 10% of our total 2011 revenue.

Code of Conduct

We maintain a Code of Business Conduct and Ethics applicable to our Board and all of our officers and employees, including our principal executive officer, principal financial officer, principal accounting officer, controller and persons performing similar functions. A copy of our Code of Business Conduct and Ethics is available on our website, www.brandywinerealty.com. In addition to being accessible through our website, copies of our Code of Business Conduct and Ethics can be obtained, free of charge, upon written request to Investor Relations, 555 East Lancaster Avenue, Suite 100, Radnor, PA 19087. Any amendments to or waivers of our Code of Business Conduct and Ethics that apply to our principal executive officer, principal financial officer, principal accounting officer, controller and persons performing similar functions and that relate to any matter enumerated in Item 406(b) of Regulation S-K promulgated by the SEC will be disclosed on our website.

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Corporate Governance Principles and Board Committee Charters

Our Corporate Governance Principles and the charters of the Executive Committee, Audit Committee, Compensation Committee and Corporate Governance Committee of the Board of Trustees of Brandywine Realty Trust and additional information regarding our corporate governance are available on our website, www.brandywinerealty.com. In addition to being accessible through our website, copies of our Corporate Governance Principles and charters of our Board Committees can be obtained, free of charge, upon written request to Investor Relations, 555 Lancaster Avenue, Suite 100, Radnor, PA 19087.

Availability of SEC Reports

We file annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K and other information with the SEC. Members of the public may read and copy materials that we file with the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. Members of the public may also obtain information on the Public Reference Room by calling the SEC at 1-800-732-0330. The SEC also maintains an Internet web site that contains reports, proxy and information statements and other information regarding issuers, including us, that file electronically with the SEC. The address of that site is http://www.sec.gov. Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K and other information filed by us with the SEC are available, without charge, on our Internet web site, http://www.brandywinerealty.com as soon as reasonably practicable after they are filed electronically with the SEC. Copies are also available, free of charge, upon written request to Investor Relations, Brandywine Realty Trust, 555 East Lancaster Avenue, Suite 100, Radnor, PA 19087.

Item 1A. Risk Factors

Our results from operations and ability to make distributions on our equity and to pay debt service on our indebtedness may be affected by the risk factors set forth below. All investors should consider the following risk factors before deciding to purchase our securities.

Adverse economic and geopolitical conditions could have a material adverse effect on our results of operations, financial condition and our ability to pay distributions to you.

Our business is affected by the continued volatility in the financial and credit markets, the sluggish recovery in the global economy, and other market or economic challenges experienced by the U.S. economy or the real estate industry as a whole. While there are signs of recovery in the U.S. economy, the recovery rate has been much slower than anticipated. Our portfolio consists primarily of office buildings (as compared to a more diversified real estate portfolio); if economic conditions persist or again deteriorate, then our results of operations, financial condition, financial results and ability to service current debt and to pay distributions to our shareholders may be adversely affected by the following, among other potential conditions:

• significant job losses in the financial and professional services industries may occur, which may decrease demand for our office space, causing market rental rates and property values to be negatively impacted;

• our ability to borrow on terms and conditions that we find acceptable, or at all, may be limited, which could reduce our ability to complete development opportunities and refinance existing debt;

• reduced values of our properties may limit our ability to dispose of assets at attractive prices or to obtain debt financing secured by our properties and may reduce the availability of unsecured loans;

• the value and liquidity of our short-term investments and cash deposits could be reduced as a result of a deterioration of the financial condition of the institutions that hold our cash deposits or the institutions or assets in which we have made short-term investments, the dislocation of the markets for our short-term investments, increased volatility in market rates for such investments or other factors;

• reduced liquidity in debt markets and increased credit risk premiums for certain market participants may impair our ability to access capital; and

• one or more lenders under our line of credit could refuse or be unable to fund their financing commitment to us and we may not be able to replace the financing commitment of any such lenders on favorable terms, or at all.

These conditions, which could have a material adverse effect on our results of operations, financial condition and ability to pay distributions, may continue or worsen in the future.

Our performance is subject to risks associated with our properties and with the real estate industry.

Our economic performance and the value of our real estate assets, and consequently the value of our securities, are subject to the risk that if our properties do not generate revenues sufficient to meet our operating expenses, including debt service and capital expenditures, our cash flow and ability to pay distributions to our shareholders will be adversely affected. Events or conditions beyond our control that may adversely affect our operations or the value of our properties include:

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• downturns in the national, regional and local economic climate including increases in the unemployment rate and inflation;

• competition from other office, mixed use, industrial and commercial buildings;

• local real estate market conditions, such as oversupply or reduction in demand for office, industrial or commercial space;

• changes in interest rates and availability of financing;

• vacancies, changes in market rental rates and the need to periodically repair, renovate and re-lease space;

• increased operating costs, including insurance expense, utilities, real estate taxes, janitorial costs, state and local taxes, labor shortages and heightened security costs;

• civil disturbances, earthquakes and other natural disasters, or terrorist acts or acts of war which may result in uninsured or underinsured losses;

• significant expenditures associated with each investment, such as debt service payments, real estate taxes, insurance and maintenance costs which are generally not reduced when circumstances cause a reduction in revenues from a property; and

• declines in the financial condition of our tenants and our ability to collect rents from our tenants.

The disruption in the debt capital markets could adversely affect us.

Notwithstanding the recent improvement in capital and credit markets, these markets are still considered volatile and disruptions in these markets are still possible. In some cases, the markets have produced downward pressure on stock prices and credit availability for certain issuers without regard to those issuers’ underlying financial strength. These events have an adverse effect on the availability of credit, the terms on which credit can be sourced and the overall cost of debt capital. This could negatively affect us by:

• increasing our costs to finance our ongoing operations and fund our development and redevelopment activities;

• reducing the availability of potential bidders for, and the amounts offered for, any properties we may wish to sell; and

• preventing us from accessing necessary debt capital on a timely basis leading us to consider potentially more dilutive capital transactions such as undesirable sales of properties or equity securities.

We may suffer adverse consequences due to the financial difficulties, bankruptcy or insolvency of our tenants.

The current economic conditions have caused some of our tenants to experience financial difficulties. If more of our tenants were to continue to experience financial difficulties, including bankruptcy, insolvency or a general downturn in their business, there could be an adverse effect on our financial performance and distributions to shareholders. We cannot assure you that any tenant that files for bankruptcy protection will continue to pay us rent. A bankruptcy filing by or relating to one of our tenants or a lease guarantor would bar efforts by us to collect pre-bankruptcy debts from that tenant or lease guarantor, or its property, unless we receive an order permitting us to do so from the bankruptcy court. In addition, we cannot evict a tenant solely because of bankruptcy. The bankruptcy of a tenant or lease guarantor could delay our efforts to collect past due balances under the relevant leases, and could ultimately preclude collection of these sums. If a lease is assumed by the tenant in bankruptcy, all pre-bankruptcy balances due under the lease must be paid to us in full. If, however, a lease is rejected by a tenant in bankruptcy, we would have only a general, unsecured claim for damages. Any such unsecured claim would only be paid to the extent that funds are available and only in the same percentage as is paid to all other holders of general, unsecured claims. Restrictions under the bankruptcy laws further limit the amount of any other claims that we can make if a lease is rejected. As a result, it is likely that we would recover substantially less than the full value of the remaining rent during the term. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Factors that May Influence Future Results of Operations - Tenant Credit Risk."

The terms and covenants relating to our indebtedness could adversely impact our economic performance.

Like other real estate companies which incur debt, we are subject to risks associated with debt financing, such as the insufficiency of cash flow to meet required debt service payment obligations and the inability to refinance existing indebtedness. If our debt cannot be paid, refinanced or extended at maturity, we may not be able to make distributions to shareholders at expected levels or at all. Furthermore, an increase in our interest expense could adversely affect our cash flow and ability to make distributions to shareholders. If we do not meet our debt service obligations, any properties securing such indebtedness could be foreclosed on, which would have a material adverse effect on our cash flow and ability to make distributions and, depending on the number of properties foreclosed on, could threaten our continued viability.

Our Credit Facility, new term loans and the indenture governing our unsecured public debt securities contain (and any new or amended facility will contain) restrictions, requirements and other limitations on our ability to incur indebtedness, including total debt to asset ratios, secured debt to total asset ratios, debt service coverage ratios and minimum ratios of unencumbered assets to unsecured debt which we must maintain. Our ability to borrow under our credit facilities is subject to compliance with such financial and other covenants. In the event that we fail to satisfy these covenants, we would be in default under the credit facilities,

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the term loan and the indenture and may be required to repay such debt with capital from other sources. Under such circumstances, other sources of capital may not be available to us, or may be available only on unattractive terms. In addition, the mortgages on our properties contain customary covenants such as those that limit our ability, without the prior consent of the lender, to further mortgage the applicable property or to discontinue insurance coverage. If we breach covenants in our secured debt agreements, the lenders can declare a default and take possession of the property securing the defaulted loan.

Increases in interest rates on variable rate indebtedness will increase our interest expense, which could adversely affect our cash flow and ability to make distributions to shareholders. Rising interest rates could also restrict our ability to refinance existing debt when it matures. In addition, an increase in interest rates could decrease the amounts that third parties are willing to pay for our assets, thereby limiting our ability to alter our portfolio promptly in relation to economic or other conditions. We entered into and may, from time to time, enter into agreements such as interest rate hedges, swaps, floors, caps and other interest rate hedging contracts with respect to a portion of our variable rate debt. Although these agreements may lessen the impact of rising interest rates on us, they also expose us to the risk that other parties to the agreements will not perform or that we cannot enforce the agreements.

Our degree of leverage could limit our ability to obtain additional financing or affect the market price of our equity shares or debt securities.

Our degree of leverage could affect our ability to obtain additional financing for working capital expenditures, development, acquisitions or other general corporate purposes. In the event that our unsecured debt is downgraded by Moody’s Investor Services or Standard & Poor’s from the current ratings, we would likely incur higher borrowing costs and the market prices of our common shares and debt securities might decline. Our degree of leverage could also make us more vulnerable to a downturn in business or the economy in general.

We may experience increased operating costs, which might reduce our profitability.

Our properties are subject to increases in operating expenses such as for cleaning, electricity, heating, ventilation and air conditioning, administrative costs and other costs associated with security, landscaping and repairs and maintenance of our properties. In general, under our leases with tenants, we pass through all or a portion of these costs to them. We cannot assure you, however, that tenants will actually bear the full burden of these higher costs, or that such increased costs will not lead them, or other prospective tenants, to seek office space elsewhere. If operating expenses increase, the availability of other comparable office space in our core geographic markets might limit our ability to increase rents; if operating expenses increase without a corresponding increase in revenues, our profitability could diminish and limit our ability to make distributions to shareholders.

Our investment in property development or redevelopment may be more costly or difficult to complete than we anticipate.

We intend to continue to develop properties where market conditions warrant such investment. Once made, these investments may not produce results in accordance with our expectations. Risks associated with our development and construction activities include:

• the unavailability of favorable financing alternatives in the private and public debt markets;

• having sufficient capital to pay development costs;

• unprecedented market volatility in the share price of REITs;

• dependence on the financial services sector as part of our tenant base;

• construction costs exceeding original estimates due to rising interest rates, diminished availability of materials and labor, and increases in the costs of materials and labor;

• construction and lease-up delays resulting in increased debt service, fixed expenses and construction or renovation costs;

• expenditure of funds and devotion of management’s time to projects that we do not complete;

• the unavailability or scarcity of utilities;

• occupancy rates and rents at newly completed properties may fluctuate depending on a number of factors, including market and economic conditions, resulting in lower than projected rental rates and a corresponding lower return on our investment;

• complications (including building moratoriums and anti-growth legislation) in obtaining necessary zoning, occupancy and other governmental permits; and

• increased use restrictions by local zoning or planning authorities limiting our ability to develop and impacting the size of developments.

See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Factors that May Influence Future Results of Operations - Development Risk."

We face risks associated with property acquisitions.

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We have recently acquired properties, and may in the future continue to acquire, properties and portfolios of properties, including large portfolios that would increase our size and potentially alter our capital structure. Although we believe that the acquisitions that we have completed and that we expect to undertake in the future have, and will, enhance our future financial performance, the success of such transactions is subject to a number of factors, including the risks that:

• we may not be able to obtain financing for acquisitions on favorable terms;

• acquired properties may fail to perform as expected;

• the actual costs of repositioning or redeveloping acquired properties may be higher than our estimates;

• acquired properties may be located in new markets where we may have limited knowledge and understanding of the local economy, an absence of business relationships in the area or unfamiliarity with local governmental and permitting procedures; and

• we may not be able to efficiently integrate acquired properties, particularly portfolios of properties, into our organization and manage new properties in a way that allows us to realize cost savings and synergies.

We acquired in the past and in the future may acquire properties or portfolios of properties through tax deferred contribution transactions in exchange for partnership interests in our Operating Partnership. This acquisition structure has the effect, among other factors, of reducing the amount of tax depreciation we can deduct over the tax life of the acquired properties, and typically requires that we agree to protect the contributors’ ability to defer recognition of taxable gain through restrictions on our ability to dispose of the acquired properties and/or the allocation of partnership debt to the contributors to maintain their tax bases. These restrictions on dispositions could limit our ability to sell an asset or pay down partnership debt during a specified time, or on terms, that would be favorable absent such restrictions.

Acquired properties may subject us to known and unknown liabilities.

Properties that we acquire may be subject to known and unknown liabilities for which we would have no recourse, or only limited recourse, to the former owners of such properties. As a result, if a liability were asserted against us based upon ownership of an acquired property, we might be required to pay significant sums to settle it, which could adversely affect our financial results and cash flow. Unknown liabilities relating to acquired properties could include:

• liabilities for clean-up of pre-existing disclosed or undisclosed environmental contamination;

• claims by tenants, vendors or other persons arising on account of actions or omissions of the former owners of the properties; and

• liabilities incurred in the ordinary course of business.

We have agreed not to sell certain of our properties and to maintain indebtedness subject to guarantees.

We agreed not to sell some of our properties for varying periods of time, in transactions that would trigger taxable income to the former owners, and we may enter into similar arrangements as a part of future property acquisitions. These agreements generally provide that we may dispose of the subject properties only in transactions that qualify as tax-free exchanges under Section 1031 of the Internal Revenue Code or in other tax deferred transactions. Such transactions can be difficult to complete and can result in the property acquired in exchange for the disposed of property inheriting the tax attributes (including tax protection covenants) of the sold property. Violation of these tax protection agreements would impose significant costs on us. As a result, we are restricted with respect to decisions related to financing, encumbering, expanding or selling these properties.

We have also entered into agreements that provide prior owners of properties with the right to guarantee specific amounts of indebtedness and, in the event that the specific indebtedness that they guarantee is repaid or reduced, we would be required to provide substitute indebtedness for them to guarantee. These agreements may hinder actions that we may otherwise desire to take to repay or refinance guaranteed indebtedness because we would be required to make payments to the beneficiaries of such agreements if we violate these agreements.

We may be unable to renew leases or re-lease space as leases expire; certain leases may expire early.

If tenants do not renew their leases upon expiration, we may be unable to re-lease the space. Even if the tenants do renew their leases or if we can re-lease the space, the terms of renewal or re-leasing (including the cost of required renovations) may be less favorable than the current lease terms. Certain leases grant the tenants an early termination right upon payment of a termination penalty or if we fail to comply with certain material lease terms. Our inability to renew or release spaces and the early termination of certain leases could affect our ability to make distributions to shareholders. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations - Factors that May Influence Future Results of Operations - Tenant Rollover Risk."

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We face significant competition from other real estate developers.

We compete with real estate developers, operators and institutions for tenants and acquisition and development opportunities. Some of these competitors may have significantly greater financial resources than we have. Such competition may reduce the number of suitable investment opportunities available to us, may interfere with our ability to attract and retain tenants and may increase vacancies, which could result in increased supply and lower market rental rates, reducing our bargaining leverage and adversely affect our ability to improve our operating leverage. In addition, some of our competitors may be willing (e.g., because their properties may have vacancy rates higher than those for our properties) to make space available at lower rental rates or with higher tenant concession percentages than available space in our properties. We cannot assure you that this competition will not adversely affect our cash flow and our ability to make distributions to shareholders.

Property ownership through joint ventures may limit our ability to act exclusively in our interest.

We develop, acquire, and contribute properties in joint ventures with other persons or entities when we believe circumstances warrant the use of such structures. As of December 31, 2011 , we had investments in 18 unconsolidated real estate ventures. Our net investments in the 18 unconsolidated real estate ventures aggregated approximately $ 115.8 million as of December 31, 2011 . We could become engaged in a dispute with one or more of our joint venture partners that might affect our ability to operate a jointly-owned property. Moreover, our joint venture partners may, at any time, have business, economic or other objectives that are inconsistent with our objectives, including objectives that relate to the appropriate timing and terms of any sale or refinancing of a property. In some instances, our joint venture partners may have competing interests in our markets that could create conflicts of interest. If the objectives of our joint venture partners or the lenders to our joint ventures are inconsistent with our own objectives, we may not be able to act exclusively in our interests. Furthermore, if the current constrained credit conditions in the capital markets persist or deteriorate further, the value of our investments could deteriorate and we could be required to reduce the carrying value of our equity method investments if a loss in the carrying value of the investment is other than a temporary decline pursuant to the accounting standard governing the equity method of accounting.

Because real estate is illiquid, we may not be able to sell properties when appropriate.

Real estate investments generally, and in particular large office and industrial/flex properties like those that we own, often cannot be sold quickly. The capitalization rates at which properties may be sold are generally higher than historic rates, thereby reducing our potential proceeds from sale. Consequently, we may not be able to alter our portfolio promptly in response to changes in economic or other conditions. In addition, the Internal Revenue Code limits our ability to sell properties that we have held for fewer than two years without potential adverse consequences to our shareholders. Furthermore, properties that we have developed and have owned for a significant period of time or that we acquired in exchange for partnership interests in our operating partnership often have a low tax basis. If we were to dispose of any of these properties in a taxable transaction, we may be required under provisions of the Internal Revenue Code applicable to REITs to distribute a significant amount of the taxable gain to our shareholders and this could, in turn, impact our cash flow. In some cases, tax protection agreements with third parties will prevent us from selling certain properties in a taxable transaction without incurring substantial costs. In addition, purchase options and rights of first refusal held by tenants or partners in joint ventures may also limit our ability to sell certain properties. All of these factors reduce our ability to respond to changes in the performance of our investments and could adversely affect our cash flow and ability to make distributions to shareholders as well as the ability of someone to purchase us, even if a purchase were in our shareholders’ best interests.

Some potential losses are not covered by insurance.

We currently carry comprehensive “all-risk” property, and rental loss insurance and commercial general liability coverage on all of our properties. We believe the policy specifications and insured limits of these policies are adequate and appropriate. There are, however, types of losses, such as lease and other contract claims, biological, radiological and nuclear hazards and acts of war that generally are not insured. We cannot assure you that we will be able to renew insurance coverage in an adequate amount or at reasonable prices. In addition, insurance companies may no longer offer coverage against certain types of losses, such as losses due to earthquake, terrorist acts and mold, flood, or, if offered, these types of insurance may be prohibitively expensive. Should an uninsured loss or a loss in excess of insured limits occur, we could lose all or a portion of the capital we have invested in a property, as well as the anticipated future revenue from the property. In such an event, we might nevertheless remain obligated for any mortgage debt or other financial obligations related to the property. We cannot assure you that material losses in excess of insurance proceeds will not occur in the future. If any of our properties were to experience a catastrophic loss, it could seriously disrupt our operations, delay revenue and result in large expenses to repair or rebuild the property. Such events could adversely affect our cash flow and ability to make distributions to shareholders. If one or more of our insurance providers were to fail to pay a claim as a result of insolvency, bankruptcy or otherwise, the nonpayment of such claims could have an adverse effect on our financial condition and results of operations. In addition, if one or more of our insurance providers were to become subject to insolvency, bankruptcy or other proceedings and our insurance policies with the provider were terminated or cancelled as a result

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of those proceedings, we cannot guarantee that we would be able to find alternative coverage in adequate amounts or at reasonable prices. In such case, we could experience a lapse in any or adequate insurance coverage with respect to one or more properties and be exposed to potential losses relating to any claims that may arise during such period of lapsed or inadequate coverage.

Terrorist attacks and other acts of violence or war may adversely impact our performance and may affect the markets on which our securities are traded.

Terrorist attacks against our properties, or against the United States or our interests, may negatively impact our operations and the value of our securities. Attacks or armed conflicts could result in increased operating costs; for example, it might cost more in the future for building security, property and casualty insurance, and property maintenance. As a result of terrorist activities and other market conditions, the cost of insurance coverage for our properties could also increase. We might not be able to pass through the increased costs associated with such increased security measures and insurance to our tenants, which could reduce our profitability and cash flow. Furthermore, any terrorist attacks or armed conflicts could result in increased volatility in or damage to the United States and worldwide financial markets and economy. Such adverse economic conditions could affect the ability of our tenants to pay rent and our cost of capital, which could have a negative impact on our results.

Our ability to make distributions is subject to various risks.

Historically, we have paid quarterly distributions to our shareholders. Our ability to make distributions in the future will depend upon:

• the operational and financial performance of our properties;

• capital expenditures with respect to existing, developed and newly acquired properties;

• general and administrative costs associated with our operation as a publicly-held REIT;

• the amount of, and the interest rates on, our debt; and

• the absence of significant expenditures relating to environmental and other regulatory matters.

Certain of these matters are beyond our control and any significant difference between our expectations and actual results could have a material adverse effect on our cash flow and our ability to make distributions to shareholders.

Changes in the law may adversely affect our cash flow.

Because increases in income and service taxes are generally not passed through to tenants under leases, such increases may adversely affect our cash flow and ability to make expected distributions to shareholders. Our properties are also subject to various regulatory requirements, such as those relating to the environment, fire and safety. Our failure to comply with these requirements could result in the imposition of fines and damage awards and could result in a default under some of our tenant leases. Moreover, the costs to comply with any new or different regulations could adversely affect our cash flow and our ability to make distributions. Although we believe that our properties are in material compliance with all such requirements, we cannot assure you that these requirements will not change or that newly imposed requirements will not require significant expenditures in order to be compliant.

Potential liability for environmental contamination could result in substantial costs.

Under various federal, state and local laws, ordinances and regulations, we may be liable for the costs to investigate and remove or remediate hazardous or toxic substances on or in our properties, often regardless of whether we know of or are responsible for the presence of these substances. These costs may be substantial. While we do maintain environmental insurance, we can not be assured that our insurance coverage will be sufficient to protect us from all of the aforesaid remediation costs. Also, if hazardous or toxic substances are present on a property, or if we fail to properly remediate such substances, our ability to sell or rent the property or to borrow using that property as collateral may be adversely affected.

Other laws and regulations govern indoor and outdoor air quality including those that can require the abatement or removal of asbestos-containing materials in the event of damage, demolition, renovation or remodeling and also govern emissions of and exposure to asbestos fibers in the air. The maintenance and removal of lead paint and certain electrical equipment containing polychlorinated biphenyls (PCBs) and underground storage tanks are also regulated by federal and state laws. We are also subject to risks associated with human exposure to chemical or biological contaminants such as molds, pollens, viruses and bacteria which, above certain levels, can be alleged to be connected to allergic or other health effects and symptoms in susceptible individuals. We could incur fines for environmental compliance and be held liable for the costs of remedial action with respect to the foregoing regulated substances or tanks or related claims arising out of environmental contamination or human exposure to contamination at or from our properties.

Additionally, we develop, manage, lease and/or operate various properties for third parties. Consequently, we may be considered

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to have been or to be an operator of these properties and, therefore, potentially liable for removal or remediation costs or other potential costs that could relate to hazardous or toxic substances.

An earthquake or other natural disasters could adversely affect our business.

Some of our properties are located in California which is a high risk geographical area for earthquakes or other natural disasters. Depending upon its magnitude, an earthquake could severely damage our properties which would adversely affect our business. We maintain earthquake insurance for our California properties and the resulting business interruption. We cannot assure you that our insurance will be sufficient if there is a major earthquake.

Americans with Disabilities Act compliance could be costly.

The Americans with Disabilities Act of 1990, as amended (“ADA”) requires that all public accommodations and commercial facilities, including office buildings, meet certain federal requirements related to access and use by disabled persons. Compliance with ADA requirements could involve the removal of structural barriers from certain disabled persons’ entrances which could adversely affect our financial condition and results of operations. Other federal, state and local laws may require modifications to or restrict further renovations of our properties with respect to such accesses. Although we believe that our properties are in material compliance with present requirements, noncompliance with the ADA or similar or related laws or regulations could result in the United States government imposing fines or private litigants being awarded damages against us. In addition, changes to existing requirements or enactments of new requirements could require significant expenditures. Such costs may adversely affect our cash flow and ability to make distributions to shareholders.

Our status as a REIT (or any of our REIT subsidiaries) is dependent on compliance with federal income tax requirements.

If we (or any of our subsidiaries that elects to be taxable as a REIT) fail to qualify as a REIT, we or the affected REIT subsidiaries would be subject to federal income tax at regular corporate rates. Also, unless the IRS granted us or our affected REIT subsidiaries, as the case may be, relief under certain statutory provisions, we or it would remain disqualified as a REIT for four years following the year it first failed to qualify. If we or any of our REIT subsidiaries fails to qualify as a REIT, we or they would be required to pay significant income taxes and would, therefore, have less money available for investments or for distributions to shareholders. This would likely have a material adverse effect on the value of the combined company’s securities. In addition, we or our affected REIT subsidiaries would no longer be required to make any distributions to shareholders.

Failure of the Operating Partnership (or a subsidiary partnership) to be treated as a partnership would have serious adverse consequences to our shareholders. If the IRS were to successfully challenge the tax status of the Operating Partnership or any of its subsidiary partnerships for federal income tax purposes, the Operating Partnership or the affected subsidiary partnership would be taxable as a corporation. In such event we would cease to qualify as a REIT and the imposition of a corporate tax on the Operating Partnership or a subsidiary partnership would reduce the amount of cash available for distribution from the Operating Partnership to us and ultimately to our shareholders.

Even if we qualify as a REIT, we will be required to pay certain federal, state and local taxes on our income and properties. In addition, our taxable REIT subsidiaries will be subject to federal, state and local income tax at regular corporate rates on their net taxable income derived from management, leasing and related service business. If we have net income from a prohibited transaction, such income will be subject to a 100% tax.

Failure to qualify as a REIT would subject us to U.S. federal income tax which would reduce the cash available for distribution to our shareholders.

We operate our business to qualify to be taxed as a REIT for federal income tax purposes. We have not requested and do not plan to request a ruling from the IRS that we qualify as a REIT, and the statements in this Annual Report on Form 10-K are not binding on the IRS or any court. As a REIT, we generally will not be subject to federal income tax on the income that we distribute currently to our shareholders. Many of the REIT requirements, however, are highly technical and complex. The determination that we are a REIT requires an analysis of various factual matters and circumstances that may not be totally within our control. For example, to qualify as a REIT, at least 95% of our gross income must come from specific passive sources, such as rent, that are itemized in the REIT tax laws. In addition, to qualify as a REIT, we cannot own specified amounts of debt and equity securities of some issuers. We also are required to distribute to our shareholders with respect to each year at least 90% of our REIT taxable income (excluding net capital gains). The fact that we hold substantially all of our assets through the Operating Partnership and its subsidiaries further complicates the application of the REIT requirements for us. Even a technical or inadvertent mistake could jeopardize our REIT status and, given the highly complex nature of the rules governing REITs and the ongoing importance of factual determinations, we cannot provide any assurance that we will continue to qualify as a REIT. Furthermore, Congress and the IRS might make changes to the tax laws and regulations, and the courts might issue new rulings, that make it more difficult,

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or impossible, for us to remain qualified as a REIT. If we fail to qualify as a REIT for federal income tax purposes and are able to avail ourselves of one or more of the statutory savings provisions in order to maintain our REIT status, we would nevertheless be required to pay penalty taxes of $50,000 or more for each such failure.

If we fail to qualify as a REIT for federal income tax purposes, and are unable to avail ourselves of certain savings provisions set forth in the Internal Revenue Code, we would be subject to federal income tax at regular corporate rates on all of our income. As a taxable corporation, we would not be allowed to take a deduction for distributions to shareholders in computing our taxable income or pass through long term capital gains to individual shareholders at favorable rates. We also could be subject to the federal alternative minimum tax and possibly increased state and local taxes. We would not be able to elect to be taxed as a REIT for four years following the year we first failed to qualify unless the IRS were to grant us relief under certain statutory provisions. If we failed to qualify as a REIT, we would have to pay significant income taxes, which would reduce our net earnings available for investment or distribution to our shareholders. This likely would have a significant adverse effect on our earnings and likely would adversely affect the value of our securities. In addition, we would no longer be required to pay any distributions to shareholders.

To maintain our REIT status, we may be forced to borrow funds on a short term basis during unfavorable market conditions.

As a REIT, we are subject to certain distribution requirements, including the requirement to distribute 90% of our REIT taxable income, that may result in our having to make distributions at disadvantageous time or to borrow funds at unfavorable rates. Compliance with this requirement may hinder our ability to operate solely on the basis of maximizing profits.

We will pay some taxes even if we qualify as a REIT, which will reduce the cash available for distribution to our shareholders.

Even if we qualify as a REIT for federal income tax purposes, we will be required to pay certain federal, state and local taxes on our income and property. For example, we will be subject to income tax to the extent we distribute less than 100% of our REIT taxable income, including capital gains. Additionally, we will be subject to a 4% nondeductible excise tax on the amount, if any, by which dividends paid by us in any calendar year are less than the sum of 85% of our ordinary income, 95% of our capital gain net income and 100% of our undistributed income from prior years. Moreover, if we have net income from “prohibited transactions,” that income will be subject to a 100% penalty tax. In general, prohibited transactions are sales or other dispositions of property held primarily for sale to customers in the ordinary course of business. The determination as to whether a particular sale is a prohibited transaction depends on the facts and circumstances related to that sale. We cannot guarantee that sales of our properties would not be prohibited transactions unless we comply with certain statutory safe-harbor provisions.

In addition, any net taxable income earned directly by our taxable REIT subsidiaries, or through entities that are disregarded for federal income tax purposes as entities separate from our taxable REIT subsidiaries, will be subject to federal and possibly state corporate income tax. In this regard, several provisions of the laws applicable to REITs and their subsidiaries ensure that a taxable REIT subsidiary will be subject to an appropriate level of federal income taxation. For example, a taxable REIT subsidiary is limited in its ability to deduct certain interest payments made to an affiliated REIT. In addition, the REIT has to pay a 100% penalty tax on some payments that it receives or on some deductions taken by a taxable REIT subsidiary if the economic arrangements between the REIT, the REIT’s customers, and the taxable REIT subsidiary are not comparable to similar arrangements between unrelated parties. Finally, some state and local jurisdictions may tax some of our income even though as a REIT we are not subject to federal income tax on that income because not all states and localities follow the federal income tax treatment of REITs. To the extent that we and our affiliates are required to pay federal, state and local taxes, we will have less cash available for distributions to our shareholders.

We face possible federal, state and local tax audits.

Because we are organized and qualify as a REIT, we are generally not subject to federal income taxes, but are subject to certain state and local taxes. Certain entities through which we own real estate either have undergone, or are currently undergoing, tax audits. Although we believe that we have substantial arguments in favor of our positions in the ongoing audits, in some instances there is no controlling precedent or interpretive guidance on the specific point at issue. There can be no assurance that these or future audits will not have a material adverse effect on our results of operations. The Operating Partnership has been audited by the Internal Revenue Service for its 2004 tax year. The audit concerned the tax treatment of a transaction in September 2004 in which we acquired a portfolio of properties through the acquisition of a limited partnership. On December 17, 2010, the IRS

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proposed an adjustment to the allocation of recourse liabilities allocated to the contributor of the properties. The Operating Partnership has appealed the proposed adjustment. The proposed adjustment, if upheld, would not result in a material tax liability for us. However, an adjustment could raise a question as to whether a contributor of partnership interests in the 2004 transaction could assert a claim against us under the tax protection agreement entered into as part of the transaction.

Competition for skilled personnel could increase labor costs.

We compete with various other companies in attracting and retaining qualified and skilled personnel. We depend on our ability to attract and retain skilled management personnel who are responsible for the day-to-day operations of our company. Competitive pressures may require that we enhance our pay and benefits package to compete effectively for such personnel. We may not be able to offset such added costs by increasing the rates we charge our tenants. If there is an increase in these costs or if we fail to attract and retain qualified and skilled personnel, our business and operating results could be harmed.

We are dependent upon our key personnel.

We are dependent upon our key personnel whose continued service is not guaranteed. We are dependent on our executive officers for strategic business direction and real estate experience. Loss of their services could adversely affect our operations.

Although we have an employment agreement with Gerard H. Sweeney, our President and Chief Executive Officer, this agreement does not restrict his ability to become employed by a competitor following the termination of his employment. We do not have key man life insurance coverage on our executive officers.

Certain limitations will exist with respect to a third party’s ability to acquire us or effectuate a change in control.

Limitations imposed to protect our REIT status . In order to protect us against the loss of our REIT status, our Declaration of Trust limits any shareholder from owning more than 9.8% in value of our outstanding shares, subject to certain exceptions. The ownership limit may have the effect of precluding acquisition of control of us. If anyone acquires shares in excess of the ownership limit, we may:

• consider the transfer to be null and void;

• not reflect the transaction on our books;

• institute legal action to stop the transaction;

• not pay dividends or other distributions with respect to those shares;

• not recognize any voting rights for those shares; and

• consider the shares held in trust for the benefit of a person to whom such shares may be transferred.

Limitation due to our ability to issue preferred shares. Our Declaration of Trust authorizes our Board of Trustees to cause us to issue preferred shares, without limitation as to amount and without shareholder consent. Our Board of Trustees is able to establish the preferences and rights of any preferred shares issued and these shares could have the effect of delaying or preventing someone from taking control of us, even if a change in control were in our shareholders’ best interests.

Limitation imposed by the Maryland Business Combination Law . The Maryland General Corporation Law, as applicable to Maryland REITs, establishes special restrictions against “business combinations” between a Maryland REIT and “interested shareholders” or their affiliates unless an exemption is applicable. An interested shareholder includes a person, who beneficially owns, and an affiliate or associate of the trust who, at any time within the two-year period prior to the date in question, was the beneficial owner of, ten percent or more of the voting power of our then-outstanding voting shares. Among other things, Maryland law prohibits (for a period of five years) a merger and certain other transactions between a Maryland REIT and an interested shareholder unless the board of trustees had approved the transaction before the party became an interested shareholder. The five-year period runs from the most recent date on which the interested shareholder became an interested shareholder. Thereafter, any such business combination must be recommended by the board of trustees and approved by two super-majority shareholder votes unless, among other conditions, the common shareholders receive a minimum price for their shares and the consideration is received in cash or in the same form as previously paid by the interested shareholder for our shares or unless the board of trustees approved the transaction before the party in question became an interested shareholder. The business combination statute could have the effect of discouraging offers to acquire us and of increasing the difficulty of consummating any such offers, even if the acquisition would be in our shareholders’ best interests.

Maryland Control Share Acquisition Act . Maryland law provides that “control shares” of a REIT acquired in a “control share acquisition” shall have no voting rights except to the extent approved by a vote of two-thirds of the vote eligible to be cast on the matter under the Maryland Control Share Acquisition Act. “Control Shares” means shares that, if aggregated with all other shares previously acquired by the acquirer or in respect of which the acquirer is able to exercise or direct the exercise of voting power

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(except solely by virtue of a revocable proxy), would entitle the acquirer to exercise voting power in electing trustees within one of the following ranges of voting power: one-tenth or more but less than one-third, one-third or more but less than a majority or a majority or more of all voting power. Control shares do not include shares the acquiring person is then entitled to vote as a result of having previously obtained shareholder approval. A “control share acquisition” means the acquisition of control shares, subject to certain exceptions. If voting rights or control shares acquired in a control share acquisition are not approved at a shareholder’s meeting, then subject to certain conditions and limitations the issuer may redeem any or all of the control shares for fair value. If voting rights of such control shares are approved at a shareholder’s meeting and the acquirer becomes entitled to vote a majority of the shares entitled to vote, all other shareholders may exercise appraisal rights. Any control shares acquired in a control share acquisition which are not exempt under our Bylaws are subject to the Maryland Control Share Acquisition Act. Our Bylaws contain a provision exempting from the control share acquisition statute any and all acquisitions by any person of our shares. We cannot assure you that this provision will not be amended or eliminated at any time in the future.

Advance Notice Provisions for Shareholder Nominations and Proposals . Our bylaws require advance notice for shareholders to nominate persons for election as trustees at, or to bring other business before, any meeting of our shareholders. This bylaw provision limits the ability of shareholders to make nominations of persons for election as trustees or to introduce other proposals unless we are notified in a timely manner prior to the meeting.

Many factors can have an adverse effect on the market value of our securities.

A number of factors might adversely affect the price of our securities, many of which are beyond our control. These factors include:

• increases in market interest rates, relative to the dividend yield on our shares. If market interest rates go up, prospective purchasers of our securities may require a higher yield. Higher market interest rates would not, however, result in more funds for us to distribute and, to the contrary, would likely increase our borrowing costs and potentially decrease funds available for distribution. Thus, higher market interest rates could cause the market price of our common shares to go down;

• anticipated benefit of an investment in our securities as compared to investment in securities of companies in other industries (including benefits associated with tax treatment of dividends and distributions);

• perception by market professionals of REITs generally and REITs comparable to us in particular;

• level of institutional investor interest in our securities;

• relatively low trading volumes in securities of REITs;

• our results of operations and financial condition; and

• investor confidence in the stock market generally.

The market value of our common shares is based primarily upon the market’s perception of our growth potential and our current and potential future earnings and cash distributions. Consequently, our common shares may trade at prices that are higher or lower than our net asset value per common share. If our future earnings or cash distributions are less than expected, it is likely that the market price of our common shares will diminish.

Additional issuances of equity securities may be dilutive to shareholders.

The interests of our shareholders could be diluted if we issue additional equity securities to finance future developments or acquisitions or to repay indebtedness. Our Board of Trustees may authorize the issuance of additional equity securities without shareholder approval. Our ability to execute our business strategy depends upon our access to an appropriate blend of debt financing, including unsecured lines of credit and other forms of secured and unsecured debt, and equity financing, including the issuance of common and preferred equity.

The issuance of preferred securities may adversely affect the rights of holders of our common shares.

Because our Board of Trustees has the power to establish the preferences and rights of each class or series of preferred shares, we may afford the holders in any series or class of preferred shares preferences, distributions, powers and rights, voting or otherwise, senior to the rights of holders of common shares. Our Board of Trustees also has the power to establish the preferences and rights of each class or series of units in Brandywine Operating Partnership, and may afford the holders in any series or class of preferred units preferences, distributions, powers and rights, voting or otherwise, senior to the rights of holders of common units.

The acquisition of new properties or the development of new properties which lack operating history with us may give rise to difficulties in predicting revenue potential.

We may continue to acquire additional properties and may seek to develop our existing land holdings strategically as warranted by market conditions. These acquisitions and developments could fail to perform in accordance with expectations. If we fail to

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accurately estimate occupancy levels, operating costs or costs of improvements to bring an acquired property or a development property up to the standards established for our intended market position, the performance of the property may be below expectations. Acquired properties may have characteristics or deficiencies affecting their valuation or revenue potential that we have not yet discovered. We cannot assure you that the performance of properties acquired or developed by us will increase or be maintained under our management.

Our performance is dependent upon the economic conditions of the markets in which our properties are located.

Our properties are located in Pennsylvania, New Jersey, Delaware, Maryland, Virginia, Texas, and California. Like other real estate markets, these commercial real estate markets have been impacted by the sluggish economic recovery from the recent recession, and any adverse changes in economic conditions in the future in any of these economies or real estate markets could negatively affect cash available for distribution. Our financial performance and ability to make distributions to our shareholders will be particularly sensitive to the economic conditions in these markets. The local economic climate, which may be adversely impacted by business layoffs or downsizing, industry slowdowns, changing demographics and other factors, and local real estate conditions, such as oversupply of or reduced demand for office, industrial and other competing commercial properties, may affect revenues and the value of properties, including properties to be acquired or developed. We cannot assure you that these local economies will grow in the future.

Item 1B. Unresolved Staff Comments

None.

ITEM 2. Properties

Property Acquisitions

On August 12, 2011 , we acquired an office property located in Philadelphia, Pennsylvania, together with related ground tenancy rights under a long-term ground lease, through the foreclosure of an $18.8 million note receivable secured by the property. We purchased the note receivable from a third party on August 2, 2011 which was funded through an advance under our unsecured revolving Credit Facility and with available corporate funds. The office property contains 192,707 of net rentable square feet and was 57.2% leased as of December 31, 2011 .

On March 28, 2011 , we acquired two office properties containing a total of 126,496 net rentable square feet in Glen Allen, Virginia known as Overlook I and II for $12.6 million . The acquired properties are 100% leased as of December 31, 2011 . We funded the acquisition price through an advance under our Credit Facility and with available corporate funds.

On January 20, 2011 , we acquired a one acre parcel of land in Philadelphia, Pennsylvania for $9.3 million . We funded the cost of this acquisition through an advance under our Credit Facility and with available corporate funds. We thereafter contributed the acquired property into a newly formed real estate venture known as 1919 Ventures in return for a 50% general partner interest in the venture , with the other partner contributing cash for general partner interest. 1919 Ventures is evaluating a mixed-use development at the parcel.

Development and Redevelopment Properties Placed in Service

Property Sales

We sold the following office properties during the year ended December 31, 2011 :

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Month of Sale	Property/Portfolio Name	Location	# of Bldgs.	Rentable Square Feet/ Acres	Property/Portfolio Occupancy % at Date of Sale	Sales Price (in thousands)
Dec-11	Brandywine AI Ventures	Various (1)	3	587,317	86.3 %	$ 156,000
Nov-11	442 Creamery Way	Exton, PA	1	104,500	100.0 %	7,425
Oct-11	Lake Center II	Marlton, NJ	1	40,287	47.8 %	2,216
Oct-11	Five Greentree Center	Marlton, NJ	1	165,956	92.2 %	20,584
Jun-11	Three Greentree Center	Marlton, NJ	1	69,300	13.9 %	5,891
	Total Office Properties Sold		7	967,360		$ 192,116

(1) Includes an office property with a net rentable square feet of 183,618 which we will continue to consolidate due to our continuing involvement in this property resulting from our ongoing lease for management space at this property and our 50% ownership interest in the newly formed unconsolidated real estate venture.

On October 14, 2011 , we sold an undeveloped parcel of land in Dallas, Texas containing six acres of land for $0.6 million .

Properties

As of December 31, 2011 , we owned 207 office properties, 20 industrial facilities and five mixed-use properties that contain an aggregate of approximately 25.2 million net rentable square feet. The properties are located in or near Philadelphia, Pennsylvania, Metropolitan Washington, D.C., Southern and Central New Jersey, Richmond, Virginia, Wilmington, Delaware, Austin, Texas, and Oakland, Concord, Carlsbad and Rancho Bernardo, California. As of December 31, 2011 , the Properties were approximately 86.5% occupied by 1,390 tenants and had an average age of approximately 19.2 years. The office properties are primarily suburban office buildings containing an average of approximately 0.1 million net rentable square feet. The industrial and mixed-use properties accommodate a variety of tenant uses, including light manufacturing, assembly, distribution and warehousing. We carry comprehensive liability, fire, extended coverage and rental loss insurance covering all of the properties, with policy specifications and insured limits which we believe are adequate.

The following table sets forth information with respect to our core properties at December 31, 2011 :

		Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
PENNSYLVANIA SUBURBS SEGMENT
150 Radnor Chester Road		Radnor	PA	1983	340,380	100.0 %	$ 9,312	$ 31.43
201 King of Prussia Road		Radnor	PA	2001	251,434	100.0 %	6,343	28.22
555 Lancaster Avenue		Radnor	PA	1973	241,687	98.6 %	6,334	28.45
401 Plymouth Road		Plymouth Meeting	PA	2001	202,252	96.0 %	5,015	22.88
One Radnor Corporate Center		Radnor	PA	1998	198,378	100.0 %	4,997	23.86
101 West Elm Street		W. Conshohocken	PA	1999	173,827	97.8 %	4,064	24.91
Five Radnor Corporate Center		Radnor	PA	1998	164,655	100.0 %	4,870	32.35
Four Radnor Corporate Center		Radnor	PA	1995	164,464	100.0 %	3,896	26.50
751-761 Fifth Avenue		King Of Prussia	PA	1967	158,000	100.0 %	732	3.96
630 Allendale Road		King of Prussia	PA	2000	150,000	76.0 %	2,466	25.11
640 Freedom Business Center	(d)	King Of Prussia	PA	1991	132,000	98.0 %	1,923	24.57
52 Swedesford Square		East Whiteland Twp.	PA	1988	131,017	35.1 %	—	—
400 Berwyn Park		Berwyn	PA	1999	124,182	95.6 %	2,892	25.42
4000 Chemical Road		Plymouth Meeting	PA	2007	120,877	100.0 %	2,970	27.99
Three Radnor Corporate Center		Radnor	PA	1998	119,087	100.0 %	2,866	27.26

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		Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
101 Lindenwood Drive		Malvern	PA	1988	118,121	97.1 %	1,734	13.27
300 Berwyn Park		Berwyn	PA	1989	108,619	96.0 %	2,050	24.17
Two Radnor Corporate Center		Radnor	PA	1998	97,936	72.9 %	1,493	28.96
301 Lindenwood Drive		Malvern	PA	1984	97,813	79.8 %	1,532	19.66
1 West Elm Street		W. Conshohocken	PA	1999	97,737	100.0 %	2,575	27.97
555 Croton Road		King of Prussia	PA	1999	96,909	95.4 %	2,365	30.03
500 North Gulph Road		King Of Prussia	PA	1979	93,082	74.3 %	1,227	20.01
620 West Germantown Pike		Plymouth Meeting	PA	1990	90,183	82.7 %	1,325	25.29
610 West Germantown Pike		Plymouth Meeting	PA	1987	90,088	90.7 %	1,184	14.33
630 West Germantown Pike		Plymouth Meeting	PA	1988	89,870	97.2 %	2,062	29.37
600 West Germantown Pike		Plymouth Meeting	PA	1986	89,626	93.8 %	1,369	22.32
630 Freedom Business Center	(d)	King Of Prussia	PA	1989	86,683	80.8 %	1,281	21.21
1200 Swedesford Road		Berwyn	PA	1994	86,622	93.1 %	1,556	26.10
620 Freedom Business Center	(d)	King Of Prussia	PA	1986	86,570	94.3 %	1,651	23.44
595 East Swedesford Road		Wayne	PA	1998	81,890	100.0 %	1,672	21.68
1050 Westlakes Drive		Berwyn	PA	1984	80,000	100.0 %	1,984	26.47
One Progress Drive		Horsham	PA	1986	79,204	80.0 %	823	6.95
1060 First Avenue	(d)	King Of Prussia	PA	1987	77,718	91.0 %	1,364	21.73
741 First Avenue		King Of Prussia	PA	1966	77,184	100.0 %	376	6.00
1040 First Avenue	(d)	King Of Prussia	PA	1985	75,488	70.4 %	1,066	24.91
200 Berwyn Park		Berwyn	PA	1987	75,025	100.0 %	1,507	21.83
1020 First Avenue	(d)	King Of Prussia	PA	1984	74,556	100.0 %	1,608	21.39
1000 First Avenue	(d)	King Of Prussia	PA	1980	74,139	100.0 %	1,343	21.83
436 Creamery Way		Exton	PA	1991	72,300	100.0 %	462	13.37
130 Radnor Chester Road		Radnor	PA	1983	71,349	100.0 %	2,150	32.98
14 Campus Boulevard		Newtown Square	PA	1998	69,542	100.0 %	1,815	26.70
170 Radnor Chester Road		Radnor	PA	1983	68,143	100.0 %	1,668	29.33
500 Enterprise Road		Horsham	PA	1990	66,751	100.0 %	823	12.99
575 East Swedesford Road		Wayne	PA	1985	66,265	100.0 %	1,229	26.91
429 Creamery Way		Exton	PA	1996	63,420	83.9 %	564	14.52
610 Freedom Business Center	(d)	King Of Prussia	PA	1985	62,991	62.3 %	582	20.97
925 Harvest Drive		Blue Bell	PA	1990	62,957	85.9 %	954	18.54
980 Harvest Drive		Blue Bell	PA	1988	62,379	71.4 %	932	20.55
426 Lancaster Avenue		Devon	PA	1990	61,102	100.0 %	1,213	20.79
1180 Swedesford Road		Berwyn	PA	1987	60,371	100.0 %	1,844	26.49
1160 Swedesford Road		Berwyn	PA	1986	60,099	100.0 %	1,479	21.01
100 Berwyn Park		Berwyn	PA	1986	57,730	86.9 %	867	18.68
440 Creamery Way		Exton	PA	1991	57,218	100.0 %	855	16.89
640 Allendale Road	(f)	King of Prussia	PA	2000	56,034	100.0 %	316	7.17
565 East Swedesford Road		Wayne	PA	1984	55,456	100.0 %	940	20.58
650 Park Avenue		King Of Prussia	PA	1968	54,338	92.0 %	726	17.81
910 Harvest Drive		Blue Bell	PA	1990	52,611	100.0 %	1,040	21.12
2240/50 Butler Pike		Plymouth Meeting	PA	1984	52,229	100.0 %	978	22.54
920 Harvest Drive		Blue Bell	PA	1990	51,875	88.9 %	797	22.01
486 Thomas Jones Way		Exton	PA	1990	51,372	84.8 %	648	18.22
660 Allendale Road	(f)	King of Prussia	PA	2011	50,635	100.0 %	211	2.66
875 First Avenue		King Of Prussia	PA	1966	50,000	100.0 %	1,037	23.16
620 Allendale Road		King Of Prussia	PA	1961	50,000	100.0 %	559	12.35
15 Campus Boulevard		Newtown Square	PA	2002	49,621	100.0 %	1,223	26.35
17 Campus Boulevard		Newtown Square	PA	2001	48,565	100.0 %	1,137	26.43

Table of Contents

		Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
11 Campus Boulevard		Newtown Square	PA	1998	47,699	100.0 %	1,219	26.44
456 Creamery Way		Exton	PA	1987	47,604	100.0 %	407	9.51
585 East Swedesford Road		Wayne	PA	1998	43,683	100.0 %	771	28.23
1100 Cassett Road		Berwyn	PA	1997	43,480	100.0 %	1,106	32.57
467 Creamery Way		Exton	PA	1988	42,000	100.0 %	608	19.30
1336 Enterprise Drive		West Goshen	PA	1989	39,330	— %	—	—
600 Park Avenue		King Of Prussia	PA	1964	39,000	100.0 %	418	6.00
412 Creamery Way		Exton	PA	1999	38,098	92.8 %	780	21.70
18 Campus Boulevard		Newtown Square	PA	1990	37,374	100.0 %	864	24.42
457 Creamery Way		Exton	PA	1990	36,019	100.0 %	389	16.19
100 Arrandale Boulevard		Exton	PA	1997	34,931	100.0 %	456	18.27
300 Lindenwood Drive		Malvern	PA	1991	33,000	100.0 %	794	24.48
2260 Butler Pike		Plymouth Meeting	PA	1984	31,892	30.9 %	486	22.22
120 West Germantown Pike		Plymouth Meeting	PA	1984	30,574	100.0 %	484	20.89
468 Thomas Jones Way		Exton	PA	1990	28,934	100.0 %	540	18.76
1700 Paoli Pike		Malvern	PA	2000	28,000	— %	—	—
140 West Germantown Pike		Plymouth Meeting	PA	1984	25,357	100.0 %	416	20.78
481 John Young Way		Exton	PA	1997	19,275	100.0 %	483	27.32
100 Lindenwood Drive		Malvern	PA	1985	18,400	100.0 %	373	22.57
200 Lindenwood Drive		Malvern	PA	1984	12,600	100.0 %	129	8.02
111 Arrandale Road		Exton	PA	1996	10,479	100.0 %	199	21.92
SUBTOTAL - PENNSYLVANIA SUBURBS SEGMENT					6,970,385	92.7 %	131,798	22.94
PHILADELPHIA CENTRAL BUSINESS DISTRICT SEGMENT
1717 Arch Street	(d)	Philadelphia	PA	1990	1,029,413	93.0 %	16,013	21.18
2970 Market Street		Philadelphia	PA	2010	862,692	100.0 %	19,543	31.03
2929 Arch Street	(d)	Philadelphia	PA	2005	730,187	100.0 %	24,629	35.67
100 North 18th Street	(e)	Philadelphia	PA	1988	708,844	97.0 %	20,175	32.42
130 North 18th Street		Philadelphia	PA	1989	595,041	100.0 %	12,789	29.51
101 - 103 Juniper Street	(g)	Philadelphia	PA	2011	N/A	— %	—	—
2930 Chestnut Street	(d), (g)	Philadelphia	PA	2010	553,421	99.2 %	76	11.17
3020 Market Street		Philadelphia	PA	1959	192,707	57.2 %	905	21.23
Philadelphia Marine Center	(d), (g)	Philadelphia	PA	Various	181,900	100.0 %	1,216	4.94
SUBTOTAL - PHILADELPHIA CENTRAL BUSINESS DISTRICT					4,854,205	96.3 %	95,346	26.54
METROPOLITAN WASHINGTON D.C. SEGMENT
1676 International Drive		McLean	VA	1999	299,387	93.8 %	8,712	33.71
13820 Sunrise Valley Drive		Herndon	VA	2007	268,240	100.0 %	9,084	32.59
2340 Dulles Corner Boulevard		Herndon	VA	1987	264,405	100.0 %	8,017	31.50
2291 Wood Oak Drive		Herndon	VA	1999	230,389	98.9 %	2,988	21.82
1900 Gallows Road		Vienna	VA	1989	210,632	67.1 %	3,283	29.49
3141 Fairview Park Drive	(h)	Falls Church	VA	1988	183,618	82.4 %	4,328	28.85

Table of Contents

		Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
2411 Dulles Corner Park		Herndon	VA	1990	180,510	78.4 %	5,181	32.92
2355 Dulles Corner Boulevard		Herndon	VA	1988	179,176	70.8 %	4,648	32.30
1880 Campus Commons Drive		Reston	VA	1985	172,943	86.7 %	1,721	12.97
2121 Cooperative Way		Herndon	VA	2000	161,275	80.8 %	3,471	21.29
6600 Rockledge Drive	(d)	Bethesda	MD	1981	160,173	91.3 %	3,684	24.26
8260 Greensboro Drive		McLean	VA	1980	158,961	77.4 %	3,224	21.52
2251 Corporate Park Drive		Herndon	VA	2000	158,016	100.0 %	5,128	34.61
12015 Lee Jackson Memorial Highway		Fairfax	VA	1985	153,255	94.8 %	4,095	26.37
13880 Dulles Corner Lane		Herndon	VA	1997	151,853	46.4 %	4,101	33.72
8521 Leesburg Pike		Vienna	VA	1984	150,897	61.3 %	2,328	23.85
2273 Research Boulevard		Rockville	MD	1999	147,689	95.7 %	4,057	29.20
2275 Research Boulevard		Rockville	MD	1990	147,650	100.0 %	4,065	30.51
2201 Cooperative Way		Herndon	VA	1990	138,806	34.9 %	3,062	16.09
2277 Research Boulevard		Rockville	MD	1986	137,045	100.0 %	3,360	29.67
11781 Lee Jackson Memorial Highway		Fairfax	VA	1982	130,935	98.2 %	3,264	27.34
11720 Beltsville Drive		Beltsville	MD	1987	128,903	58.8 %	1,755	23.72
13825 Sunrise Valley Drive		Herndon	VA	1989	104,150	12.4 %	304	25.32
198 Van Buren Street		Herndon	VA	1996	98,934	100.0 %	3,018	34.95
196 Van Buren Street		Herndon	VA	1991	97,781	47.1 %	1,819	28.20
11700 Beltsville Drive		Beltsville	MD	1981	96,843	96.3 %	2,356	25.56
11710 Beltsville Drive		Beltsville	MD	1987	81,281	100.0 %	1,570	20.11
4401 Fair Lakes Court		Fairfax	VA	1988	55,972	96.6 %	1,533	27.05
11740 Beltsville Drive		Beltsville	MD	1987	6,783	100.0 %	140	29.18
SUBTOTAL - METROPOLITAN WASHINGTON D.C. SEGMENT					4,456,502	82.8 %	104,296	27.73
NEW JERSEY/DELAWARE SEGMENT
300 Delaware Avenue		Wilmington	DE	1989	298,071	86.0 %	2,954	15.89
920 North King Street		Wilmington	DE	1989	203,328	96.7 %	4,232	27.46
10000 Midlantic Drive		Mt. Laurel	NJ	1990	183,147	52.6 %	1,300	26.33
1009 Lenox Drive		Lawrenceville	NJ	1989	180,734	83.7 %	4,136	27.70
Main Street - Plaza 1000		Voorhees	NJ	1988	162,364	31.1 %	784	20.46
400 Commerce Drive		Newark	DE	1997	154,086	100.0 %	2,321	17.20
457 Haddonfield Road		Cherry Hill	NJ	1990	121,737	92.2 %	1,899	22.55
2000 Midlantic Drive		Mt. Laurel	NJ	1989	121,658	92.4 %	1,246	22.75
2000 Lenox Drive		Lawrenceville	NJ	2000	119,731	100.0 %	2,644	26.91
700 East Gate Drive		Mt. Laurel	NJ	1984	119,272	94.9 %	1,769	24.66
989 Lenox Drive		Lawrenceville	NJ	1984	112,055	53.2 %	1,440	21.98
993 Lenox Drive		Lawrenceville	NJ	1985	111,124	100.0 %	2,907	20.74
1000 Howard Boulevard		Mt. Laurel	NJ	1988	105,312	46.5 %	743	20.60
One Righter Parkway	(d)	Wilmington	DE	1989	104,761	82.3 %	1,915	23.56
1000 Atrium Way		Mt. Laurel	NJ	1989	99,668	76.8 %	1,044	23.74
997 Lenox Drive		Lawrenceville	NJ	1987	97,277	81.5 %	1,941	23.67
Two Righter Parkway	(d)	Wilmington	DE	1987	95,514	72.0 %	1,190	21.37
1120 Executive Boulevard		Mt. Laurel	NJ	1987	95,183	60.6 %	611	22.91
15000 Midlantic Drive		Mt. Laurel	NJ	1991	84,056	92.9 %	898	20.48

Table of Contents

		Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
220 Lake Drive East		Cherry Hill	NJ	1988	78,509	84.6 %	887	19.57
1200 Lenox Drive		Lawrenceville	NJ	2007	76,419	100.0 %	2,077	28.81
200 Lake Drive East		Cherry Hill	NJ	1989	76,352	86.5 %	1,143	22.47
200 Commerce Drive		Newark	DE	1998	68,034	100.0 %	1,327	20.90
9000 Midlantic Drive		Mt. Laurel	NJ	1989	67,299	74.2 %	409	22.58
6 East Clementon Road		Gibbsboro	NJ	1980	66,236	28.6 %	265	17.04
100 Commerce Drive		Newark	DE	1989	62,787	54.3 %	883	20.44
701 East Gate Drive		Mt. Laurel	NJ	1986	61,794	93.1 %	560	16.19
210 Lake Drive East		Cherry Hill	NJ	1986	60,604	68.9 %	723	24.73
308 Harper Drive		Moorestown	NJ	1976	59,500	83.3 %	542	18.96
305 Fellowship Drive		Mt. Laurel	NJ	1980	56,824	88.3 %	789	23.23
309 Fellowship Drive		Mt. Laurel	NJ	1982	55,911	74.7 %	571	20.31
307 Fellowship Drive		Mt. Laurel	NJ	1981	54,485	92.6 %	660	20.13
303 Fellowship Drive		Mt. Laurel	NJ	1979	53,768	66.8 %	468	21.62
1000 Bishops Gate		Mt. Laurel	NJ	2005	53,281	100.0 %	1,015	24.20
1000 Lenox Drive		Lawrenceville	NJ	1982	52,264	100.0 %	1,329	30.97
100 Lenox Drive		Lawrenceville	NJ	1991	50,942	100.0 %	972	23.09
2 Foster Avenue	(f)	Gibbsboro	NJ	1974	50,761	94.6 %	220	4.65
4000 Midlantic Drive		Mt. Laurel	NJ	1998	46,945	100.0 %	575	22.13
Five Eves Drive		Marlton	NJ	1986	45,564	95.0 %	687	16.98
161 Gaither Drive		Mount Laurel	NJ	1987	44,739	100.0 %	655	24.24
Main Street - Piazza		Voorhees	NJ	1990	44,708	100.0 %	494	21.91
20 East Clementon Road		Gibbsboro	NJ	1986	38,260	84.7 %	358	17.06
Two Eves Drive		Marlton	NJ	1987	37,532	96.6 %	396	16.39
304 Harper Drive		Moorestown	NJ	1975	32,978	97.4 %	450	22.38
Main Street - Promenade		Voorhees	NJ	1988	31,445	83.8 %	225	10.85
Four B Eves Drive		Marlton	NJ	1987	27,011	100.0 %	406	17.14
815 East Gate Drive		Mt. Laurel	NJ	1986	25,500	65.1 %	184	18.44
817 East Gate Drive		Mt. Laurel	NJ	1986	25,351	100.0 %	268	15.25
Four A Eves Drive		Marlton	NJ	1987	24,687	82.2 %	313	16.76
1 Foster Avenue	(f)	Gibbsboro	NJ	1972	24,255	100.0 %	111	4.58
4 Foster Avenue	(f)	Gibbsboro	NJ	1974	23,372	100.0 %	162	7.79
7 Foster Avenue		Gibbsboro	NJ	1983	22,158	70.5 %	189	17.80
10 Foster Avenue		Gibbsboro	NJ	1983	18,651	88.9 %	162	18.02
5 U.S. Avenue	(f)	Gibbsboro	NJ	1987	5,000	100.0 %	24	5.00
50 East Clementon Road		Gibbsboro	NJ	1986	3,080	100.0 %	174	56.41
5 Foster Avenue		Gibbsboro	NJ	1968	2,000	100.0 %	—	—
SUBTOTAL - NEW JERSEY/DELAWARE SEGMENT					4,198,084	81.6 %	56,647	21.49
RICHMOND, VA SEGMENT
300 Arboretum Place		Richmond	VA	1988	212,228	95.2 %	3,622	18.61
6800 Paragon Place		Richmond	VA	1986	144,813	78.6 %	2,216	19.18
6802 Paragon Place		Richmond	VA	1989	143,784	89.3 %	2,202	12.83
7501 Boulders View Drive		Richmond	VA	1990	136,641	91.7 %	1,977	11.28
2511 Brittons Hill Road	(f)	Richmond	VA	1987	132,548	100.0 %	678	6.66
2100-2116 West Laburnam Avenue		Richmond	VA	1976	128,337	100.0 %	1,804	15.26
7300 Beaufont Springs Drive		Richmond	VA	2000	120,665	100.0 %	1,953	16.38

Table of Contents

		Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
1025 Boulders Parkway		Richmond	VA	1994	93,143	68.3 %	1,485	18.71
2201-2245 Tomlynn Street	(f)	Richmond	VA	1989	85,860	89.9 %	395	6.75
7401 Beaufont Springs Drive		Richmond	VA	1998	82,706	66.2 %	883	8.56
7325 Beaufont Springs Drive		Richmond	VA	1999	75,218	100.0 %	1,396	21.14
100 Gateway Centre Parkway		Richmond	VA	2001	74,991	72.0 %	568	17.23
6806 Paragon Place		Richmond	VA	2007	74,480	100.0 %	1,755	25.85
9011 Arboretum Parkway		Richmond	VA	1991	73,183	79.4 %	886	18.76
4870 Sadler Road		Glen Allen	VA	2000	63,832	100.0 %	1,061	20.99
4880 Sadler Road		Glen Allen	VA	1998	62,664	100.0 %	958	20.28
4805 Lake Brooke Drive		Glen Allen	VA	1996	60,867	100.0 %	730	19.80
9100 Arboretum Parkway		Richmond	VA	1988	58,445	74.6 %	777	18.34
2812 Emerywood Parkway		Henrico	VA	1980	56,984	100.0 %	878	11.63
4364 South Alston Avenue		Durham	NC	1985	56,601	62.6 %	902	15.95
2277 Dabney Road	(f)	Richmond	VA	1986	50,400	100.0 %	308	8.00
9200 Arboretum Parkway		Richmond	VA	1988	49,542	100.0 %	737	16.49
9210 Arboretum Parkway		Richmond	VA	1988	48,012	64.0 %	571	13.90
2212-2224 Tomlynn Street	(f)	Richmond	VA	1985	45,353	94.7 %	319	9.22
2221-2245 Dabney Road	(f)	Richmond	VA	1994	45,250	100.0 %	273	8.08
2251 Dabney Road	(f)	Richmond	VA	1983	42,000	89.8 %	186	7.61
2161-2179 Tomlynn Street	(f)	Richmond	VA	1985	41,550	70.8 %	210	8.01
2256 Dabney Road	(f)	Richmond	VA	1982	33,413	100.0 %	232	8.85
2246 Dabney Road	(f)	Richmond	VA	1987	33,271	100.0 %	284	9.72
2244 Dabney Road	(f)	Richmond	VA	1993	33,050	100.0 %	286	9.52
9211 Arboretum Parkway		Richmond	VA	1991	30,791	83.0 %	86	11.47
2248 Dabney Road	(f)	Richmond	VA	1989	30,184	100.0 %	190	8.63
2130-2146 Tomlynn Street	(f)	Richmond	VA	1988	29,700	100.0 %	186	9.35
2120 Tomlyn Street	(f)	Richmond	VA	1986	23,850	100.0 %	132	8.29
2240 Dabney Road	(f)	Richmond	VA	1984	15,389	100.0 %	133	9.61
SUBTOTAL - RICHMOND, VA SEGMENT					2,489,745	90.1 %	31,259	14.45
AUSTIN, TX
1250 Capital of Texas Highway South		Austin	TX	1984	270,711	98.4 %	3,278	22.81
1301 Mopac Expressway		Austin	TX	2001	222,580	100.0 %	4,091	28.53
3711 South Mopac Expressway		Austin	TX	2007	205,195	100.0 %	3,720	29.1
1601 Mopac Expressway		Austin	TX	2000	195,639	100.0 %	2,657	19.56
1501 South Mopac Expressway		Austin	TX	1999	195,324	100.0 %	2,581	23.79
1221 Mopac Expressway		Austin	TX	2001	173,302	100.0 %	2,947	11.19
SUBTOTAL - AUSTIN, TX					1,262,751	99.7 %	19,274	23.00
CALIFORNIA
155 Grand Avenue		Oakland	CA	1990	200,996	75.9 %	4,736	36.25
2 Kaiser Land	(g)	Oakland	CA	N/A	—	— %	—	—
Oakland Lot B	(g)	Oakland	CA	N/A	—	— %	—	—
1220 Concord Avenue		Concord	CA	1984	175,153	100.0 %	4,204	23.26
1200 Concord Avenue		Concord	CA	1984	175,103	99.6 %	4,436	24.71

Table of Contents

	Location	State	Year Built/ Renovated	Net Rentable Square Feet	Percentage Leased as of December 31, 2011 (a)	Total Base Rent for the Twelve Months Ended December 31, 2011 (b) (000's)	Average Annualized Rental Rate as of December 31, 2011 (c)
5780 & 5790 Fleet Street	Carlsbad	CA	1999	121,381	81.4 %	2,485	26.13
5900 & 5950 La Place Court	Carlsbad	CA	1988	80,506	38.4 %	643	18.1
16870 West Bernardo Drive	Rancho Bernardo	CA	2002	68,708	96.1 %	1,447	29.33
5963 La Place Court	Carlsbad	CA	1987	61,587	68.0 %	650	13.75
2035 Corte Del Nogal	Carlsbad	CA	1991	53,982	76.5 %	760	19.01
5973 Avenida Encinas	Carlsbad	CA	1986	51,695	88.3 %	1,046	23.6
SUBTOTAL - CALIFORNIA				989,111	83.6 %	20,407	25.93
TOTAL CORE PORTFOLIO				25,220,783	89.5 %	$ 459,027	$ 23.46

(a) Calculated by dividing net rentable square feet included in leases signed on or before December 31, 2011 at the property by the aggregate net rentable square feet of the property.

(b) “Total Base Rent” for the twelve months ended December 31, 2011 represents base rents earned during such period, excluding tenant reimbursements and deferred market rent adjustments, calculated in accordance with generally accepted accounting principles (GAAP) determined on a straight-line basis.

(c) “Average Annualized Rental Rate” is calculated by taking: (i) for office leases written on a triple net basis, the sum of the annualized base rent utilizing contractual rental rates pursuant to executed leases as of December 31, 2011 exclusive of concessions and abatements plus the prorata 2011 budgeted operating expense reimbursements excluding tenant electricity; and (ii) for office leases written on a full service basis, the annualized base rent utilizing contractual rental rates pursuant to executed leases as of December 31, 2011 exclusive of concessions and abatements, and dividing the sum of such amounts by the total square footage occupied as of December 31, 2011 .

(d) These properties are subject to a ground lease with a third party.

(e) We hold our interest in Two Logan Square (100 North 18th Street) through our ownership of second and third mortgages that are secured by this property and that are junior to a first mortgage with a third party. Our ownership of these two mortgages currently provides us with all of the cash flows from Two Logan Square after the payment of operating expenses and debt service on the first mortgage.

(f) These properties are industrial facilities.

(g) These are mixed-use properties.

(h) We contributed this property to an unconsolidated real estate venture, however, we will continue to consolidate this property due to our continuing involvement resulting from our ongoing lease of space, and our 50% ownership interest in the venture. Please see Note 3 to the consolidated financial financial statements for additional information.

The following table shows information regarding rental rates and lease expirations for the Properties at December 31, 2011 and assumes that none of the tenants exercises renewal options or termination rights, if any, at or prior to scheduled expirations:

Table of Contents

Year of Lease Expiration December 31,	Number of Leases Expiring Within the Year	Rentable Square Footage Subject to Expiring Leases	Final Annualized Base Rent Under Expiring Leases (a)	Final Annualized Base Rent Per Square Foot Expiring Leases	Percentage of Total Final Annualized Base Rent Under Expiring Leases	Cumulative Total
2011 (b)	81	159,562	$ 3,025,094	$ 18.96	0.5 %	0.5 %
2012	281	2,035,560	51,922,219	25.51	8.9 %	9.4 %
2013	249	2,193,966	50,830,854	23.17	8.8 %	18.2 %
2014	219	2,453,387	63,231,149	25.77	10.9 %	29.1 %
2015	197	2,460,559	61,163,813	24.86	10.5 %	39.6 %
2016	206	1,930,564	50,764,099	26.29	8.7 %	48.3 %
2017	167	2,713,200	76,061,255	28.03	13.1 %	61.4 %
2018	81	1,545,754	46,396,684	30.02	8.0 %	69.4 %
2019	58	1,122,558	38,259,447	34.08	6.6 %	76.0 %
2020	30	866,007	22,231,381	25.67	3.8 %	79.8 %
2021	37	1,137,800	29,508,128	25.93	5.1 %	84.9 %
2022 and thereafter	46	3,199,520	86,770,054	27.12	15.0 %	100.0 %
	1,652	21,818,437	$ 580,164,177	$ 26.59	100.0 %

(a) “Final Annualized Base Rent” for each lease scheduled to expire represents the cash rental rate of base rents, excluding tenant reimbursements, in the final month prior to expiration multiplied by 12. Tenant reimbursements generally include payment of a portion of real estate taxes, operating expenses and common area maintenance and utility charges.

(b) Relates to existing month-to-month tenancy leases and to expired leases that we executed, which converted to month-to-month tenancies until a written notice to vacate is provided by us or a new lease agreement is agreed upon with the tenant.

At December 31, 2011 , our Properties were leased to 1,390 tenants that are engaged in a variety of businesses. The following table sets forth information regarding leases at the Properties with the 20 tenants with the largest amounts leased based upon Annualized Base Rent as of December 31, 2011 :

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Tenant Name (a)	Number of Leases	Weighted Average Remaining Lease Term Months	Aggregate Leased Square Feet	Aggregate Leased Square Square Feet	Annualized Base Rent (in 000) (b)	Percentage of Aggregate Annualized Base Rent
General Services Administration — U.S. Govt.	17	192	1,547,532	7.1 %	$ 34,371	6.9 %
Northrop Grumman Corporation	5	48	471,005	2.2 %	14,887	3.0 %
Pepper Hamilton LLP	2	36	312,336	1.4 %	11,971	2.4 %
Lockheed Martin	9	22	556,584	2.6 %	10,366	2.1 %
Wells Fargo Bank, N.A.	11	63	439,687	2.0 %	10,260	2.1 %
Time Warner Cable, Inc.	1	91	266,899	1.2 %	8,709	1.8 %
KPMG, LLP	2	33	241,828	1.1 %	7,715	1.6 %
Dechert LLP	1	94	218,565	1.0 %	7,468	1.5 %
Lincoln National Management Co.	1	103	193,626	0.9 %	6,315	1.3 %
Drinker Biddle & Reath LLP	1	30	209,584	1.0 %	6,034	1.2 %
Blank Rome LLP	1	121	236,903	1.1 %	6,012	1.2 %
Marsh & McLennan Companies, Inc.	3	16	177,199	0.8 %	5,331	1.1 %
Deltek Systems, Inc.	1	128	157,911	0.7 %	4,974	1.0 %
Hewlett Packard	2	54	141,339	0.6 %	4,128	0.8 %
Freescale Semiconductor, Inc.	1	20	144,438	0.7 %	3,826	0.8 %
Intel Corporation	1	13	164,061	0.8 %	3,782	0.8 %
Woodcock Washburn, LLP	1	120	109,323	0.5 %	3,736	0.8 %
Computer Sciences	4	31	202,992	0.9 %	3,715	0.8 %
VWR Management Services LLC	1	156	149,858	0.7 %	3,708	0.7 %
AT&T	3	90	108,583	0.5 %	3,361	0.7 %
Consolidated Total/Weighted Average	68	94	6,050,253	27.8 %	$ 160,669	32.6 %

(a) The identified tenant includes affiliates in certain circumstances.

(b) Annualized Base Rent represents the monthly Base Rent, excluding tenant reimbursements, for each lease in effect at December 31, 2011 multiplied by 12. Tenant reimbursements generally include payment of a portion of real estate taxes, operating expenses and common area maintenance and utility charges.

Real Estate Ventures

As of December 31, 2011 , we had an aggregate investment (net of returns of investment) of approximately $115.8 million in 18 unconsolidated Real Estate Ventures. We formed these ventures with unaffiliated third parties to develop or manage office properties or to acquire land in anticipation of possible development of office properties. As of December 31, 2011 , 15 of the Real Estate Ventures owned 52 office buildings that contain an aggregate of approximately 6.7 million net rentable square feet, two Real Estate Ventures owned four acres of undeveloped land, and one Real Estate Venture developed a hotel property that contains 137 rooms in Conshohocken, PA.

We account for our investments in these Real Estate Ventures using the equity method. Our ownership interests range from 20% to 65% , subject to specified priority allocations in certain of the Real Estate Ventures. Our investments, initially recorded at cost, are subsequently adjusted for our share of the Real Estate Ventures’ income or loss and contributions to capital and distributions, unless we have no intent or obligation to fund losses in which case our investment would not go below zero.

On January 20, 2011 , we acquired a one acre parcel of land in Philadelphia, Pennsylvania for $9.3 million . We funded the cost of this acquisition through an advance under our unsecured credit facility and with available corporate funds. We thereafter contributed the acquired property into 1919 Ventures in return for a 50% general partner interest in the venture . Our general partner contributed cash for general partner interest. 1919 Ventures is evaluating a mixed-use development at the parcel.

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On December 20, 2011 , we formed a joint venture with Current Creek, a wholly-owned subsidiary of Allstate Insurance Company. We and Current Creek each own a 50% interest in the Venture. The Venture owns three office properties, which we contributed to the Venture upon its formation. The contributed office properties contain an aggregate of 587,317 net rentable square feet and consist of 3130 and 3141 Fairview Park Drive, both located in Falls Church, Virginia, and 7101 Wisconsin Avenue located in Bethesda, Maryland.

As of December 31, 2011 , we had guaranteed repayment of approximately $ 0.7 million of loans on behalf of the Real Estate Ventures. We also provide customary environmental indemnities and completion guarantees in connection with construction and permanent financing both for our own account and on behalf of the Real Estate Ventures.

ITEM 3. Legal Proceedings

We are involved from time to time in legal proceedings, including tenant disputes, employee disputes, disputes arising out of agreements to purchase or sell properties and disputes relating to state and local taxes. We generally consider these disputes to be routine to the conduct of our business and management believes that the final outcome of such proceedings will not have a material adverse effect on our financial position, results of operations or liquidity.

ITEM 4. Mine Safety Disclosures

None.

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PART II

ITEM 5. Market for Registrant’s Common Equity and Related Shareholder Matters and Issuer Purchases of Equity Securities

Our common shares are traded on the New York Stock Exchange (“NYSE”) under the symbol “BDN.” There is no established trading market for the Class A units of the Operating Partnership, nor was there a trading market for the Class F (2010) units of the Operating Partnership, which were outstanding between August 5, 2010 and December 23, 2011, and were held by a single holder during this period. On February 17, 2012 , there were 736 holders of record of our common shares and 39 holders of record of the Class A units (in addition to Brandywine Realty Trust). On February 23, 2012 , the last reported sales price of the common shares on the NYSE was $11.02 . The following table sets forth the quarterly high and low sales price per common share reported on the NYSE for the indicated periods and the distributions paid by us with respect to each such period.

	Share Price High	Share Price Low	Distributions Paid During Quarter
First Quarter 2010	$ 12.90	$ 10.29	$ 0.15
Second Quarter 2010	$ 13.36	$ 10.75	$ 0.15
Third Quarter 2010	$ 12.62	$ 10.00	$ 0.15
Fourth Quarter 2010	$ 12.99	$ 10.22	$ 0.15
First Quarter 2011	$ 12.32	$ 11.09	$ 0.15
Second Quarter 2011	$ 12.76	$ 11.06	$ 0.15
Third Quarter 2011	$ 12.34	$ 7.88	$ 0.15
Fourth Quarter 2011	$ 9.63	$ 7.09	$ 0.15

For each quarter in 2011 and 2010 , the Operating Partnership paid a cash distribution per Class A unit in an amount equal to the dividend paid on a common share for each such quarter.

In order to maintain the status of Brandywine Realty Trust as a REIT, we must make annual distributions to shareholders of at least 90% of our taxable income (not including net capital gains). Future distributions will be declared at the discretion of our Board of Trustees and will depend on our actual cash flow, financial condition and capital requirements, the annual distribution requirements under the REIT provisions of the Internal Revenue Code of 1986 and such other factors as our Board deems relevant.

On December 13, 2011 , our Board of Trustees declared a quarterly dividend distribution of $0.15 per common share that was paid on January 19, 2012 . Our Board of Trustees has adopted a dividend policy designed to match our distributions to our projected, normalized taxable income for 2012 .

On June 30, 2011 , we filed with the NYSE our annual CEO Certification and Annual Written Affirmation pursuant to Section 303A.12 of the NYSE Listed Company Manual, each certifying that we were in compliance with all of the listing standards of the NYSE.

The following table provides information as of December 31, 2011 with respect to compensation plans under which our equity securities are authorized for issuance:

	(a)	(b)	(c)
Plan category	Number of securities to be issued upon exercise of outstanding options, warrants and rights	Weighted-average exercise price of outstanding options, warrants and rights	Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Equity compensation plans approved by security holders (1)	3,599,672	$ 14.50	5,789,202
Equity compensation plans not approved by security holders	—	—	—
Total	3,599,672	$ 14.50	5,789,202

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(1) Relates to our Amended and Restated 1997 Long-Term Incentive Plan (the “1997 Plan”) and 46,667 options awarded prior to adoption of the 1997 Plan. In June 2010, our shareholders approved amendments to the 1997 Plan. The amendments, among other things, increased the number of common shares available for awards under the 1997 Plan by 6,000,000 (of which 3,600,000 were made available solely for awards of options and share appreciation rights).

The following table presents information related to our common share repurchases during the year ended December 31, 2011 :

Period	Total Number of Shares Purchased		Average Price Paid per Share	Shares that May Yet Be Purchased Under the Plans or Programs (a)
				(in thousands)
January 1 to January 31	10,485	(b)	$ 11.53	539,200
February 1 to February 28	—			539,200
March 1 to March 31	27,083	(b)	11.81	539,200
April 1 to April 31	47,999	(b)	11.82	539,200
May 1 to May 31	—			539,200
June 1 to June 30	—			539,200
July 1 to July 31	—			539,200
August 1 to August 31	—			539,200
September 1 to September 31	—			539,200
October 1 to October 31	—			539,200
November 1 to November 31	—			539,200
December 1 to December 31	—			539,200
Total	85,567

(a) Relates to the remaining share repurchase availability under the Parent Company’s share repurchase program. There is no expiration date on the share repurchase program. The Parent Company’s Board of Trustees initially authorized this program in 1998 and has periodically replenished capacity under the program.

(b) Represents common shares cancelled by the Parent Company upon vesting of restricted common shares previously awarded to Company employees in satisfaction of tax withholding obligations. Such shares do not reduce the total number of shares that remain available to be purchased under the share repurchase program.

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SHARE PERFORMANCE GRAPH

The Securities and Exchange Commission requires us to present a chart comparing the cumulative total shareholder return on the common shares with the cumulative total shareholder return of (i) a broad equity index and (ii) a published industry or peer group index. The following chart compares the cumulative total shareholder return for the common shares with the cumulative shareholder return of companies on (i) the S&P 500 Index (ii) the Russell 2000 and (iii) the NAREIT ALL-REIT Total Return Index as provided by NAREIT for the period beginning December 31, 2006 and ending December 31, 2011 .

Index	Year Ended — 12/31/2006	12/31/2007	12/31/2008	12/31/2009	12/31/2010	12/31/2011
Brandywine Realty Trust	100.00	57.23	27.38	44.63	48.03	41.53
S&P 500	100.00	105.49	66.46	84.05	96.71	98.76
Russell 2000	100.00	98.43	65.18	82.89	105.14	100.75
NAREIT All Equity REIT Index	100.00	84.31	52.50	67.20	85.98	93.10

ITEM 6. Selected Financial Data

The following table sets forth selected financial and operating data and should be read in conjunction with the financial statements and related notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in this Annual Report on Form 10-K. The selected data have been revised to reflect disposition of all properties since January 1, 2007, which have been reclassified as discontinued operations for all periods presented in accordance with the accounting standard governing discontinued operations.

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Brandywine Realty Trust

(in thousands, except per common share data and number of properties)

Year Ended December 31,	2011 (a,b)		2010 (b)		2009 (a,b)		2008 (a,b)		2007 (b)
Operating Results
Total revenue	$ 581,805		$ 559,956		$ 567,920		$ 573,596		$ 588,768
Income (loss) from continuing operations	(13,232	)	(31,276	)	3,588		(2,465	)	5,243
Net income (loss)	(4,715	)	(17,606	)	8,089		38,525		55,335
Income (loss) allocated to Common Shares	(12,996	)	(25,578	)	(245	)	28,462		44,124
Loss from continuing operations per Common Share
Basic	$ (0.16	)	$ (0.29	)	$ (0.04	)	$ (0.13	)	$ (0.05	)
Diluted	$ (0.16	)	$ (0.29	)	$ (0.04	)	$ (0.13	)	$ (0.05	)
Earnings (loss) per Common Share
Basic	$ (0.10	)	$ (0.19	)	$ —		$ 0.32		$ 0.50
Diluted	$ (0.10	)	$ (0.19	)	$ —		$ 0.32		$ 0.50
Cash distributions paid per Common Share	$ 0.60		$ 0.60		$ 0.60		$ 1.76		$ 1.76
Balance Sheet Data
Real estate investments, net of accumulated depreciation	$ 4,061,461		$ 4,201,410		$ 4,164,992		$ 4,191,367		$ 4,657,333
Total assets	4,557,718		4,690,378		4,663,750		4,742,619		5,213,968
Total indebtedness	2,393,995		2,430,446		2,454,577		2,741,495		3,081,949
Total liabilities	2,668,022		2,712,604		2,742,010		3,020,121		3,363,759
Noncontrolling interest	33,105		128,272		38,308		52,961		84,076
Brandywine Realty Trust’s equity	1,856,591		1,849,502		1,883,432		1,669,537		1,766,133
Other Data
Cash flows from:
Operating activities	179,015		185,127		220,405		233,867		224,805
Investing activities	(47,931	)	(171,936	)	(102,549	)	164,046		39,162
Financing activities	(147,239	)	1,807		(120,213	)	(399,589	)	(283,746	)
Property Data
Number of properties owned at year end	232		233		245		248		257
Net rentable square feet owned at year end	25,221		25,633		25,563		26,257		28,888

(a) During 2011 , we recorded additional income of $0.5 million related to electricity charges in prior years that were under-billed to a certain tenant. This resulted in the overstatement of total revenue by $0.5 million during the current year and in the understatement of total revenue by $0.3 million and $0.2 million for the years ended December 31, 2009 and 2008 , respectively. Because this error was not material to prior years' consolidated financial statements and the impact of recording the error in the current year is not material to our consolidated financial statements, we recorded the related adjustment in the current year.

(b) The consolidated statement of operations during 2011 also contained an out of period depreciation and amortization expense adjustment of $4.7 million relating to intangible assets representing tenant relationships and in-place leases that should have been written off in prior periods. Our recognition of this expense in 2011 resulted in the overstatement of depreciation and amortization expense by $4.7 million million in 2011. During the year ended December 31, 2010 , depreciation and amortization expense was overstated by $1.7 million and was understated by $1.4 million , $1.8 million , $1.7 million and $1.5 million during the years ended December 31, 2009 , 2008 , 2007 , and 2006 , respectively. As this error was not material to prior years' consolidated financial statements and that the impact of recording the error in the current year is not material to our consolidated financial statements, we recorded the related adjustment during the current year.

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Brandywine Operating Partnership, L.P.

(in thousands, except per common partnership unit data and number of properties)

Year Ended December 31,	2011 (a,b)		2010 (b)		2009 (a,b)		2008 (a,b)		2007 (b)
Operating Results
Total revenue	$ 581,805		$ 559,956		$ 567,920		$ 573,596		$ 588,768
Income (loss) from continuing operations	(13,232	)	(31,276	)	3,588		(2,465	)	5,243
Net income (loss)	(4,715	)	(17,606	)	8,089		38,525		55,335
Loss from continuing operations per Common Partnership Unit
Basic	$ (0.15	)	$ (0.29	)	$ (0.04	)	$ (0.13	)	$ (0.05	)
Diluted	$ (0.15	)	$ (0.29	)	$ (0.04	)	$ (0.13	)	$ (0.05	)
Earnings (loss) per Common Partnership Units
Basic	$ (0.09	)	$ (0.19	)	$ —		$ 0.32		$ 0.50
Diluted	$ (0.09	)	$ (0.19	)	$ —		$ 0.32		$ 0.50
Cash distributions paid per Common Partnership Unit	$ 0.60		$ 0.60		$ 0.60		$ 1.76		$ 1.76
Balance Sheet Data
Real estate investments, net of accumulated depreciation	$ 4,061,461		$ 4,201,410		$ 4,164,992		$ 4,191,367		$ 4,657,333
Total assets	4,557,718		4,690,378		4,663,750		4,742,619		5,213,968
Total indebtedness	2,393,995		2,430,446		2,454,577		2,741,495		3,081,949
Total liabilities	2,668,022		2,712,604		2,742,010		3,020,121		3,363,759
Redeemable limited partnership units	38,370		132,855		44,620		54,166		90,151
Non-controlling interest	—		—		65		—		28
Brandywine Operating Partnership’s equity	1,851,326		1,844,919		1,877,055		1,668,332		1,760,030
Other Data
Cash flows from:
Operating activities	179,015		185,127		220,405		233,867		224,805
Investing activities	(47,931	)	(171,936	)	(102,549	)	164,046		39,162
Financing activities	(147,239	)	1,807		(120,213	)	(399,589	)	(283,746	)
Property Data
Number of properties owned at year end	232		233		245		248		257
Net rentable square feet owned at year end	25,221		25,663		25,563		26,257		28,888

(b) The consolidated statement of operations during 2011 also contained an out of period depreciation and amortization expense adjustment of $4.7 million relating to intangible assets representing tenant relationships and in-place leases that should have been written off in prior periods. Our recognition of this expense in 2011 resulted in the overstatement of depreciation and amortization expense by $4.7 million million in 2011. During the year ended December 31, 2010 , depreciation and amortization expense was overstated by $1.7 million and was understated by $1.4 million , $1.8 million , $1.7 million and $1.5 million during the years ended December 31, 2009 , 2008 , 2007 , and 2006 , respectively. As this error was not material to prior years' consolidated financial statements and the impact of recording the error in the current year is not material to our consolidated financial statements, we recorded the related adjustment during the current year.

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ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the consolidated financial statements appearing elsewhere herein and is based primarily on our consolidated financial statements for the years ended December 31, 2011, 2010 and 2009.

OVERVIEW

As of December 31, 2011 , we manage our portfolio within seven segments: (1) Pennsylvania Suburbs, (2) Philadelphia CBD, (3) Metropolitan Washington D.C, (4) New Jersey/Delaware, (5) Richmond, Virginia, (6) Austin, Texas and (7) California. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Philadelphia CBD segment includes properties located in the City of Philadelphia in Pennsylvania. The Metropolitan Washington, D.C. segment includes properties in Northern Virginia and suburban Maryland. The New Jersey/Delaware segment includes properties in Burlington, Camden and Mercer counties in New Jersey and in New Castle county in the state of Delaware. The Richmond, Virginia segment includes properties primarily in Albemarle, Chesterfield, Goochland and Henrico counties and Durham, North Carolina. The Austin, Texas segment includes properties in Austin. The California segment includes properties in Oakland, Concord, Carlsbad and Rancho Bernardo.

We generate cash and revenue from leases of space at our properties and, to a lesser extent, from the management of properties owned by third parties and from investments in the Real Estate Ventures. Factors that we evaluate when leasing space include rental rates, costs of tenant improvements, tenant creditworthiness, current and expected operating costs, the length of the lease, vacancy levels and demand for office and industrial space. We also generate cash through sales of assets, including assets that we do not view as core to our portfolio, either because of location or expected growth potential, and assets that are commanding premium prices from third party investors.

Factors that May Influence Future Results of Operations

Global Market and Economic Conditions

In the U.S., market and economic conditions have been challenging, characterized by tighter credit conditions and slower growth. As a result, the cost and availability of credit has been and may continue to be adversely affected by illiquid credit markets and wider credit spreads. Concern about the stability of the markets generally and the strength of counterparties specifically has led many lenders and institutional investors to reduce, and in some cases, cease to provide funding to borrowers. Continued volatility in the U.S. and international markets and economies may adversely affect our liquidity and financial condition, and the liquidity and financial condition of our tenants. If these market conditions continue, they may limit our ability and the ability of our tenants, to timely refinance maturing liabilities and access the capital markets to meet liquidity needs.

Real Estate Asset Valuation

General economic conditions and the resulting impact on market conditions or a downturn in tenants’ businesses may adversely affect the value of our assets. Significantly challenging economic conditions in the U.S., declining demand for leased office, mixed use, or industrial properties and/or a decrease in market rental rates and/or market values of real estate assets in our submarkets could have a negative impact on the value of our properties and related tenant improvements. If we were required under GAAP to write down the carrying value of any of our properties to the lower of cost or fair value due to impairment, or if as a result of an early lease termination we were required to remove or dispose of material amounts of tenant improvements that are not reusable to another tenant, our financial condition and results of operations could be negatively affected.

Leasing Activity and Rental Rates

The amount of net rental income generated by our properties depends principally on our ability to maintain the occupancy rates of currently leased space and to lease currently available space, newly developed or redeveloped properties and space available from unscheduled lease terminations. The amount of rental income we generate also depends on our ability to maintain or increase rental rates in our submarkets. Negative trends in one or more of these factors could adversely affect our rental income in future periods.

Development and Redevelopment Programs

Historically, a significant portion of our growth has come from our development and redevelopment efforts. We have a proactive planning process by which we continually evaluate the size, timing, costs and scope of our development and redevelopment programs and, as necessary, scale activity to reflect the economic conditions and the real estate fundamentals that exist in our

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strategic submarkets. We are not currently proceeding on any development or redevelopment activity, although, we are, in the ordinary course of business, evaluating development and redevelopment opportunities. We believe that a portion of our future potential growth will continue to come from the developed or redeveloped properties that we recently placed in service once current economic conditions normalize. However, we anticipate that the general economic conditions and the resulting impact on conditions in our core markets will delay timing and reduce the scope of our development program in the near future.

Financial and Operating Performance

Our financial and operating performance is dependent upon the demand for office, industrial and other commercial space in our markets, our leasing results, our acquisition, disposition and development activity, our financing activity, our cash requirements and economic and market conditions, including prevailing interest rates.

Volatile economic conditions could result in a reduction of the availability of financing and potentially in higher borrowing costs. These factors, coupled with a sluggish economic recovery, have reduced the volume of real estate transactions and created credit stresses on most businesses. Vacancy rates may increase, and rental rates may decline, through 2012 and possibly beyond as the current economic climate negatively impacts tenants.

We expect that the impact of the current state of the economy, including high unemployment and the unprecedented volatility in the financial and credit markets, will continue to have a dampening effect on the fundamentals of our business, including increases in past due accounts, tenant defaults, lower occupancy and reduced effective rents. These conditions would negatively affect our future net income and cash flows and could have a material adverse effect on our financial condition. We believe that the quality of our assets and our strong balance sheet will enable us to raise debt capital, if necessary, in various forms and from different sources, including traditional term or secured loans from banks, pension funds and life insurance companies. However, there can be no assurance that we will be able to borrow funds on terms that are economically attractive or at all.

We seek revenue growth throughout our portfolio by increasing occupancy and rental rates. Occupancy at our wholly owned properties at December 31, 2011 was 86.5% .

The table below summarizes selected operating and leasing statistics of our wholly owned operating properties for the year ended December 31, 2011 :

	Year ended
	December 31, 2011
Leasing Activity:
Total net rentable square feet owned (1)	25,220,783
Occupancy percentage (end of period)	86.5	%
Average occupancy percentage	85.3	%
New leases and expansions commenced (square feet)	2,031,215
Leases renewed (square feet)	2,044,519
Net absorption (square feet) (2)	300,556
Percentage change in rental rates per square feet (3):
New and expansion rental rates	0.2	%
Renewal rental rates	(1.9	)%
Capital Costs Committed (4):
Leasing commissions (per square feet)	$4.94
Tenant Improvements (per square feet)	$15.44
(1) For each period, includes all properties in the core portfolio (i.e. not under development or redevelopment), including properties that were sold during these periods.
(2) Includes leasing related to completed developments and redevelopments, as well as sold properties.
(3) Rental rates include base rent plus reimbursement for operating expenses and real estate taxes.
(4) Calculated on a weighted average basis.

In seeking to increase revenue through our operating, financing and investment activities, we also seek to minimize operating risks, including (i) tenant rollover risk, (ii) tenant credit risk and (iii) development risk.

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Tenant Rollover Risk :

We are subject to the risks that tenant leases, upon expiration, are not renewed, that space may not be relet; and that the terms of renewal or reletting (including the cost of renovations) may be less favorable to us than the current lease terms. Leases accounting for approximately 9.5% of our aggregate final annualized base rents as of December 31, 2011 (representing approximately 8.7% of the net rentable square feet of the properties) expire without penalty in 2012 . We maintain an active dialogue with our tenants in an effort to maximize lease renewals. Our retention rate for leases that were scheduled to expire in 2011 was 65.2% . If we are unable to renew leases or relet space under expiring leases, at anticipated rental rates, or if tenants terminate their leases early, our cash flow would be adversely impacted.

Tenant Credit Risk :

In the event of a tenant default, we may experience delays in enforcing our rights as a landlord and may incur substantial costs in protecting our investment. Our management regularly evaluates our accounts receivable reserve policy in light of our tenant base and general and local economic conditions. Our accounts receivable allowance was $15.5 million or 11.2% of total receivables (including accrued rent receivable) as of December 31, 2011 compared to $15.2 million or 12.0% of total receivables (including accrued rent receivable) as of December 31, 2010 .

If economic conditions persist or deteriorate further, we may experience increases in past due accounts, defaults, lower occupancy and reduced effective rents. This condition would negatively affect our future net income and cash flows and could have a material adverse effect on our financial condition.

Development Risk :

At December 31, 2011 , we were completing the lease-up of four recently completed developments, aggregating 0.7 million square feet, for which we expect to spend an additional $8.5 million in 2012 . We are actively marketing space at these projects to prospective tenants but can provide no assurance as to the timing or terms of any leases of space at these projects.

As of December 31, 2011 , we owned approximately 444 acres of undeveloped land, and held options to purchase approximately 52 additional acres of undeveloped land. As market conditions warrant, we will seek to opportunistically dispose of those parcels that we do not anticipate developing. For parcels of land that we ultimately develop, we will be subject to risks and costs associated with land development, including building moratoriums and inability to obtain necessary zoning, land-use, building, occupancy and other required governmental approvals, construction cost increases or overruns and construction delays, and insufficient occupancy rates and rental rates. We have entered into development agreements related to two of our land parcels under option for ground lease that require us to commence development by December 31, 2012. If we determine that we will not be able to start the construction by the date specified, or if we determine that development is not in our best economic interest and an extension of the development period cannot be negotiated, we will write off all costs that we have incurred in preparing these parcels of land for development amounting to $7.7 million as of December 31, 2011.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Management’s Discussion and Analysis of Financial Condition and Results of Operations discuss our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the reporting periods. Certain accounting policies are considered to be critical accounting policies, as they require management to make assumptions about matters that are highly uncertain at the time the estimate is made and changes in the accounting estimate are reasonably likely to occur from period to period. Management believes the following critical accounting policies reflect our more significant judgments and estimates used in the preparation of our consolidated financial statements. For a summary of all of our significant accounting policies, see Note 2 to our consolidated financial statements included elsewhere in this report.

Revenue Recognition

We recognize rental revenue on the straight-line basis from the later of the date of the commencement of the lease or the date of acquisition of the property subject to existing leases, which averages minimum rents over the terms of the leases. Lease incentives, which are included as reductions of rental revenue are recognized on a straight-line basis over the term of the lease. Certain lease agreements contain provisions that require tenants to reimburse a pro rata share of real estate taxes and common area maintenance costs. For certain leases in the portfolio, there are significant assumptions and judgments made by management in determining the lease term such as when termination options are provided to the tenant. The lease term impacts the period over which minimum

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rents are determined and recorded and also considers the period over which lease related costs are amortized. In addition, our rental revenue is impacted by our determination of whether the improvements made by us or the tenant are landlord assets. The determination of whether an asset is a landlord asset requires judgment and principally considers whether improvements would be utilizable by another tenant upon move out by the existing tenant. To the extent they are determined not to be landlord assets, and we fund them, they are considered as lease incentives. To the extent the tenant funds the improvements that we consider to be landlord assets, we treat them as deferred revenue which is amortized to revenue over the lease term.

Real Estate Investments

Real estate investments are carried at cost. We record acquisition of real estate investments under the acquisition method of accounting and allocate the purchase price to land, buildings and intangible assets on a relative fair value basis. Depreciation is computed using the straight-line method over the useful lives of buildings and capital improvements (5 to 55 years) and over the shorter of the lease term or the life of the asset for tenant improvements. Direct construction costs related to the development of Properties and land holdings are capitalized as incurred. Capitalized costs include pre-construction costs essential to the development of the property, development and constructions costs, interest, property taxes, insurance, salaries and other project costs during the period of development. Estimates and judgments are required in determining when capitalization of certain costs such as interest should commence and cease. We expense routine repair and maintenance expenditures and capitalize those items that extend the useful lives of the underlying assets.

Real Estate Ventures

When we obtain an economic interest in an entity, we evaluate the entity to determine if the entity is deemed a variable interest entity (“VIE”), and if we are deemed to be the primary beneficiary, in accordance with the accounting standard for the consolidation of variable interest entities. This accounting standard requires significant use of judgments and estimates in determining its application. If the entity is not deemed to be a VIE, and we serve as the general partner within the entity, we evaluate to determine if our presumed control as the general partner is overcome by the “kick out” rights and other substantive participating rights of the limited partners in accordance with the same accounting standard.

We consolidate (i) entities that are VIEs and of which we are deemed to be the primary beneficiary and (ii) entities that are non-VIEs which we control. Entities that we account for under the equity method (i.e., at cost, increased or decreased by our share of earnings or losses, less distributions) include (i) entities that are VIEs and of which we are not deemed the primary beneficiary (ii) entities that are non-VIEs which we do not control, but over which we have the ability to exercise significant influence and (iii) entities that are non-VIEs which we control through our general partner status, but in which the limited partners in the entity have the substantive ability to dissolve the entity or remove us without cause or have substantive participating rights. We continuously assess our determination of whether an entity is a VIE and who the primary beneficiary is, and whether or not the limited partners in an entity have substantive rights, including if certain events occur that are likely to cause a change in original determinations.

On a periodic basis, management assesses whether there are any indicators that the value of our investments in unconsolidated joint ventures may be impaired. An investment is impaired only if management’s estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other than temporary. To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the investment over the fair value of the investment. Our estimates of value for each investment (particularly in commercial real estate joint ventures) are based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and operating costs. As these factors are difficult to predict and are subject to future events that may alter management’s assumptions; accordingly, the values estimated by management in its impairment analyses may not be realized.

Impairment of Long-Lived Assets

We review long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. The review of recoverability is based on an estimate of the future undiscounted cash flows (excluding interest charges) expected to result from the long-lived asset’s use and eventual disposition. These cash flows consider factors such as expected future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If impairment exists due to the inability to recover the carrying value of a long-lived asset, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair-value of the property. We are required to make subjective assessments as to whether there are impairments in the values of the investments in long-lived assets. These assessments have a direct impact on our net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results in future periods. Operating properties are also evaluated if

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they have been identified for potential sale. No impairment was determined; however, if actual cash flows or the estimated holding periods change, an impairment could be recorded in the future and it could be material. Although our strategy is generally to hold our properties over the long-term, we will dispose of properties to meet our liquidity needs or for other strategic needs. If our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized to reduce the property to the lower of the carrying amount or fair value less costs to sell, and such loss could be material. If we determine that impairment has occurred and the assets are classified as held and used, the affected assets must be reduced to their fair-value.

Where properties have been identified as having a potential for sale, additional judgments are required related to the determination as to the appropriate period over which the undiscounted cash flows should include the operating cash flows and the amount included as the estimated residual value. Management determines the amounts to be included based on a probability weighted cash flow. This requires significant judgment. In some cases, the results of whether an impairment is indicated are sensitive to changes in assumptions input into the estimates, including the hold period until expected sale. At December 31, 2011 , we performed an impairment assessment of our land holdings as management determined that a sale scenario was the most likely source of future cash flows for certain of the land parcels aggregating to total cost of $12.2 million which is included in land inventory. This impairment assessment required management to estimate the expected proceeds from sale at some point in the future, to determine whether an impairment was indicated. This estimate requires significant judgment. If our expectations as to the expected sales proceeds, or timing of the anticipated sale change based on market conditions or otherwise, our evaluation of impairment could be different and such differences could be material to the operations of the Company.

During our impairment review for 2011 and 2010, we determined that no impairment charges were necessary.

We also entered into development agreements related to our two parcels of land under option for ground lease that require us to commence development by December 31, 2012. If we determine that we will not be able to start the construction by the date specified, or if we determine development is not in our best economic interest and an extension of the development period cannot be negotiated, we will have to write off all costs that we have incurred in preparing these parcels of land for development amounting to $ 7.7 million as of December 31, 2011 .

Income Taxes

Parent Company

The Parent Company has elected to be treated as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”). In addition, the Parent Company may elect to treat one or more of its subsidiaries as REITs. In order to continue to qualify as a REIT, the Parent Company and each of its REIT subsidiaries are required to, among other things, distribute at least 90% of their REIT taxable income to their stockholders and meet certain tests regarding the nature of its income and assets. As REITs, the Parent Company and its REIT subsidiaries are not subject to federal income tax with respect to the portion of their income that meets certain criteria and is distributed annually to the stockholders. Accordingly, no provision for federal income taxes is included in the accompanying consolidated financial statements with respect to the operations of these REITs. The Parent Company and its REIT subsidiaries, if any, intend to continue to operate in a manner that allows them to continue to meet the requirements for taxation as REITs. Many of these requirements, however, are highly technical and complex. If the Parent Company or one of its REIT subsidiaries were to fail to meet these requirements, they would be subject to federal income tax.

The Parent Company may elect to treat one or more of its subsidiaries as a TRS. In general, a TRS may perform additional services for our tenants and generally may engage in any real estate or non-real estate related business (except for the operation or management of health care facilities or lodging facilities or the provision to any person, under a franchise, license or otherwise, of rights to any brand name under which any lodging facility or health care facility is operated). A TRS is subject to corporate federal income tax. The Parent Company has elected to treat certain of its corporate subsidiaries as TRSs; these entities provide third party property management services and certain services to tenants that could not otherwise be provided.

Operating Partnership

In general, the Operating Partnership is not subject to federal and state income taxes, and accordingly, no provision for income taxes has been made in the accompanying consolidated financial statements. The partners of the Operating Partnership are required to include their respective share of the Operating Partnership’s profits or losses in their respective tax returns. The Operating Partnership’s tax returns and the amount of allocable Partnership profits and losses are subject to examination by federal and state taxing authorities. If such examination results in changes to the Operating Partnership profits or losses, then the tax liability of the partners would be changed accordingly.

The Operating Partnership may elect to treat one or several of its subsidiaries as REITs under Sections 856 through 860 of the Code. Each subsidiary REIT has met or intends to meet the requirements for treatment as a REIT under Sections 856 through 860

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of the Code, and, accordingly, no provision has been made for federal and state income taxes in the accompanying consolidated financial statements. If any subsidiary REIT fails to qualify as a REIT in any taxable year, that subsidiary REIT will be subject to federal and state income taxes and may not be able to qualify as a REIT for the four subsequent taxable years. Also, each subsidiary REIT may be subject to certain local income taxes.

The Operating Partnership has elected to treat several of its subsidiaries as taxable TRSs, which are subject to federal, state and local income tax.

Allowance for Doubtful Accounts

We maintain an allowance for doubtful accounts that represents an estimate of losses that may be incurred from the inability of tenants to make required payments. The allowance is an estimate based on two calculations that are combined to determine the total amount reserved. First, we evaluate specific accounts where we have determined that a tenant may have an inability to meet its financial obligations. In these situations, we use our judgment, based on the facts and circumstances, and record a specific reserve for that tenant against amounts due to reduce the receivable to the amount that we expect to collect. These reserves are re-evaluated and adjusted as additional information becomes available. Second, a reserve is established for all tenants based on a range of percentages applied to receivable aging categories. If the financial condition of our tenants were to deteriorate, additional allowances may be required. For accrued rent receivables, we consider the results of the evaluation of specific accounts as well as other factors including assigning risk factors to different industries based on our tenants SIC classification. Considering various factors including assigning a risk factor to different industries, these percentages are based on historical collection and write-off experience adjusted for current market conditions.

Deferred Costs

We incur direct costs related to the financing, development and leasing of our properties. Management exercises judgment in determining whether such costs, particularly internal costs, meet the criteria for capitalization or must be expensed. Capitalized financing fees are amortized over the related loan term on a basis that approximates the effective interest method while capitalized leasing costs are amortized over the related lease term. Management re-evaluates the remaining useful lives of leasing costs as the creditworthiness of our tenants and economic and market conditions change.

Purchase Price Allocation

We allocate the purchase price of properties to net tangible and identified intangible assets acquired based on fair values. Above-market and below-market in-place lease values for acquired properties are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) our estimate of the fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancellable term of the lease (includes the below market fixed renewal period, if applicable). Capitalized above-market lease values are amortized as a reduction of rental income over the remaining non-cancellable terms of the respective leases. Capitalized below-market lease values are amortized as an increase of rental income over the remaining non-cancellable terms of the respective leases, including any fixed-rate renewal periods.

Other intangible assets also include amounts representing the value of tenant relationships and in-place leases based on our evaluation of the specific characteristics of each tenant’s lease and our overall relationship with the respective tenant. We estimate the cost to execute leases with terms similar to the remaining lease terms of the in-place leases, include leasing commissions, legal and other related expenses. This intangible asset is amortized to expense over the remaining term of the respective leases and any fixed-rate bargain renewal periods. We estimate fair value through methods similar to those used by independent appraisers or by using independent appraisals. Factors that we consider in our analysis include an estimate of the carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. We also consider information obtained about each property as a result of our pre-acquisition due diligence, marketing and leasing activities in estimating the fair value of the tangible and intangible assets acquired. In estimating carrying costs, we include real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease-up periods, which primarily range from three to twelve months.

Characteristics that we consider in allocating value to our tenant relationships include the nature and extent of our business relationship with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals. The value of tenant relationship intangibles is amortized over the remaining initial lease term and expected renewals, but in no event longer than the remaining depreciable life of the building. The value of in-place leases is amortized over the remaining non-cancellable term of the respective leases and any fixed-rate renewal periods.

In the event that a tenant terminates its lease prior to the end of the lease term, the unamortized portion of each intangible, including

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market rate adjustments, in-place lease values and tenant relationship values, would be charged to expense.

RESULTS OF OPERATIONS

The following discussion is based on our Consolidated Financial Statements for the years ended December 31, 2011, 2010 and 2009. We believe that the presentation of our consolidated financial information, without a breakdown by segment, will effectively present important information useful to our investors.

Net operating income (“NOI”) as presented in the comparative analysis below is defined as total revenue less operating expenses, real estate taxes and third party management expenses. NOI is a non-GAAP financial measure that we use internally to evaluate the operating performance of our real estate assets by segment, as presented in Note 18 to the consolidated financial statements, and of our business as a whole. We believe NOI provides useful information to investors regarding our financial condition and results of operations because it reflects only those income and expense items that are incurred at the property level. While NOI is a relevant and widely used measure of operating performance of real estate investment trusts, it does not represent cash flow from operations or net income as defined by GAAP and should not be considered as an alternative to those measures in evaluating our liquidity or operating performance. NOI does not also reflect general and administrative expenses, interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs, or trends in development and construction activities that could materially impact our results from operations. We believe that net income, as defined by GAAP, is the most appropriate earnings measure. See Note 18 to the Consolidated Financial Statements for a reconciliation of NOI to our consolidated net loss.

Comparison of the Year Ended December 31, 2011 to the Year Ended December 31, 2010

The table below shows selected operating information for the “Same Store Property Portfolio” and the “Total Portfolio.” The Same Store Property Portfolio consists of 223 properties containing an aggregate of approximately 22.2 million net rentable square feet that we owned for the entire twelve-month periods ended December 31, 2011 and 2010 . The Same Store Property Portfolio includes properties acquired or placed in service on or prior to January 1, 2010 and owned through December 31, 2011. The Total Portfolio includes the effects of other properties that were either placed into service, acquired or redeveloped after January 1, 2010 or disposed of prior to December 31, 2011. This table also includes a reconciliation from the Same Store Property Portfolio to the Total Portfolio net income (i.e., all properties owned by us during the twelve-month periods ended December 31, 2011 and 2010 ) by providing information for the properties which were acquired, under development (including lease-up assets) or placed into service and administrative/elimination information for the twelve-month periods ended December 31, 2011 and 2010 (in thousands).

The Total Portfolio net income presented in the table is equal to the net income of Brandywine Realty Trust and Brandywine Operating Partnership, L.P.

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Comparison of twelve-months ended December 31, 2011 to the twelve-months ended December 31, 2010 :

(dollars in thousands)	Same Store Property Portfolio — 2011	2010	Increase/ (Decrease)		Acquired/Completed Properties — 2011		2010		Other/ (Eliminations) (a) — 2011		2010		Total Portfolio — 2011		2010		Increase/ (Decrease)
Revenue:
Cash rents	$ 400,969	$ 417,100	$ (16,131	)	$ 45,076		$ 15,003		$ 8,823		$ 9,294		$ 454,868		$ 441,397		$ 13,471
Straight-line rents	15,840	11,152	$ 4,688		3,923		2,197		524		402		20,287		13,751		6,536
Above/below market rent amortization	5,345	5,898	$ (553	)	(41	)	(102	)	141		157		5,445		5,953		(508	)
Total rents	422,154	434,150	(11,996	)	48,958		17,098		9,488		9,853		480,600		461,101		19,499
Tenant reimbursements	70,818	73,321	(2,503	)	9,781		3,194		637		624		81,236		77,139		4,097
Termination fees	2,993	5,471	(2,478	)	—		105		—		—		2,993		5,576		(2,583	)
Third party management fees, labor reimbursement and leasing	—	—	—		—		—		11,536		11,830		11,536		11,830		(294	)
Other	3,093	2,703	390		426		60		1,921		1,547		5,440		4,310		1,130
Total revenue	499,058	515,645	(16,587	)	59,165		20,457		23,582		23,854		581,805		559,956		21,849
Property operating expenses	160,370	166,110	(5,740	)	18,387		6,774		(6,766	)	(4,973	)	171,991		167,911		4,080
Real estate taxes	49,805	49,639	166		4,785		2,166		1,640		1,759		56,230		53,564		2,666
Third party management expenses	—	—	—		—		—		5,590		5,866		5,590		5,866		(276	)
Net Operating Income	288,883	299,896	(11,013	)	35,993		11,517		23,118		21,202		347,994		332,615		15,379
General & administrative expenses	—	1	(1	)	612		304		23,990		23,001		24,602		23,306		1,296
Depreciation and amortization	183,729	189,341	(5,612	)	26,861		11,567		7,090		9,684		217,680		210,592		7,088
Operating Income (loss)	$ 105,154	$ 110,554	$ (5,400	)	$ 8,520		$ (354	)	$ (7,962	)	$ (11,483	)	$ 105,712		$ 98,717		$ 6,995
Number of properties	223	223			9		9						232		232
Square feet	22,207	22,207			3,014		3,014						25,221		25,221
Other Income (Expense):
Interest income													1,813		3,222		(1,409	)
Historic tax credit transaction income													12,026		—		12,026
Interest expense													(131,405	)	(132,640	)	1,235
Interest expense — Deferred financing costs													(4,991	)	(3,770	)	(1,221	)
Equity in income of real estate ventures													3,775		5,305		(1,530	)
Net gain on sale of interests in real estate													2,791		—		2,791
Net gain on sale of undepreciated real estate													45		—		45
Loss on real estate venture formation													(222	)	—		(222	)
Gain (loss) on early extinguishment of debt													(2,776	)	(2,110	)	(666	)
Loss from continuing operations													(13,232	)	(31,276	)	18,044
Income from discontinued operations													8,517		13,670		(5,153	)
Net Loss													$ (4,715	)	$ (17,606	)	$ 12,891
Loss per common share													$ (0.10	)	$ (0.19	)	$ 0.09

EXPLANATORY NOTES

(a) - Represents certain revenues and expenses at the corporate level as well as various intercompany costs that are eliminated in consolidation and third-party management fees. This also includes two properties that were contributed to an unconsolidated real estate venture in which the Company has a 50% ownership interest (see Note 3 for additional information).

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Total Revenue

Cash rents from the Total Portfolio increased by $13.5 million from 2010 to 2011 , primarily reflecting:

• increase of $30.1 million in rental income due to our acquisition of Three Logan Square, the completion and placement in service of the IRS Philadelphia Campus and Cira South Garage during the third quarter of 2010, the acquisition of Overlook I and II during the first quarter of 2011, the placement in service of the Juniper Street Parking Garage during the second quarter of 2011, and the acquisition of 3020 Market Street during the third quarter of 2011; and

• offsetting decrease of $16.6 million of rental income at the same store and corporate-level portfolio's as a result of declining renewal rates and the commencement of leases with free rent periods during 2011 compared to 2010.

Straight-line rents increased by $6.5 million due to the aforementioned properties that were acquired and placed in service in 2011 and also due to leases that commenced during 2011 with free rent periods at our same store properties.

Tenant reimbursements increased by $4.1 million from 2010 to 2011 primarily due to $6.6 million of additional reimbursements from the aforementioned properties that were acquired and placed in service during 2011. These increases were offset by a $2.5 million decrease in tenant reimbursements in our same store portfolio resulting from decreases in property operating expenses at our same store portfolio. These changes in tenant reimbursements are consistent with the changes in property operating expenses and real estate taxes.

Termination fees at the Total Portfolio decreased by $2.6 million from 2010 to 2011 mainly due to timing and volume of tenant move-outs during 2011.

Other Income

Other Income increased by $1.1 million mainly as a result of the expiration of a third party purchase option on a parcel of land in the Pennsylvania suburbs that was entered into during March of 2007. Upon expiration of this purchase option, we recognized the value of the option as other income.

Property Operating Expenses

Property operating expenses at the Total Portfolio increased by $4.1 million, mainly due to $11.6 million of additional expenses from the aforementioned properties that we acquired and placed in service during 2011. This increase was offset by the decreases in repairs and maintenance costs of $4.5 million, utilities costs of $1.2 million, and bad debt expense of $2.0 million during 2011 compared to 2010 within our same store portfolio. The reduction in repairs and maintenance costs are a result of contract negotiations that took place across our portfolio during 2011. The reduction in utilities costs reflects our entry in 2011 into two year contracts at lower prices within our Pennsylvania and New Jersey portfolios. Bad debt expense decreased as a result of fewer early lease terminations during 2011 compared to 2010 with such terminations requiring the write off to bad debt expense of any remaining straight line receivable balances.

Real Estate Taxes

Real estate taxes increased by $2.7 million, mainly due to additional real estate taxes from the aforementioned properties that we acquired and placed into service during 2011.

General & Administrative Expenses

General and Administrative Expense increased by $1.3 million primarily due to:

• an increase of $0.8 million in benefits claims expense as a result of more insurance claims being made compared to the prior year; and

• a decrease in capitalized salaries of $0.8 million due to less construction activity compared to the prior year

These increases were offset by a decrease of $0.3 million in various corporate level expenses during 2011, none of which were individually significant.

Depreciation and Amortization Expense

Depreciation and amortization increased by $7.1 million from 2010 to 2011 , primarily due to the additional $15.3 million of depreciation and amortization expense from the aforementioned properties that we acquired and placed into service during 2011.

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We also recorded $4.7 million of an out of period depreciation and amortization expense adjustment during the second quarter of 2011 for intangible assets representing tenant relationships and in-place leases that should have been written off in prior years (see Note 2 to the consolidated financial statements). These increases were offset by $12.9 million in expense decreases related to asset write-offs related to early move-outs and fully amortized assets in 2010, without comparable expenses in 2011.

Interest Income

Interest income decreased by $1.4 million, primarily due to our receipt during the third quarter of 2010 of the repayment of the $40.0 million purchase money mortgage note that we extended to the buyer of our properties in Oakland, California in October 2008.

Historic tax credit transaction income

During the third quarter of 2011, we recognized $12.0 million of income related to our historic tax credit financing. We expect to recognize approximately the same amount of income each year over the remaining four year tax credit recapture period as defined in the Code. See Note 16 to the consolidated financial statements for additional details of our historic tax credit transaction.

Interest Expense

The decrease in interest expense of $1.2 million is primarily due to the following:

• decrease of $10.6 million related to our $300.0 million 5.625% Guaranteed Notes that matured during December of 2010;

• decrease of $7.5 million as a result of our prior year hedges maturing during the fourth quarter of 2010;

• decrease of $2.0 million related to the repurchase of our $345.0 million 3.875% Guaranteed exchangeable notes;

• decrease of $1.1 million in mortgage interest expense which is directly related to the $199.8 million decrease in mortgage indebtedness during the year ended December 31, 2011; and,

• decrease of $1.3 million resulting from our buybacks of unsecured notes during 2011. The details of various repurchases made during 2011 are noted in "Gain (loss) on early extinguishment of debt" section below.

The decrease of $22.5 million in interest expense described above was offset by the following increases in interest expense during 2011 compared to 2010:

• increase of $12.3 million related our issuance in April 2011 of $325.0 million 4.950% Guaranteed Notes due 2018;

• decrease of $8.4 million of capitalized interest expense as a result of lower development activity during 2011;

• increase of $0.3 million related to the Historic Tax Credit interest accretion. We accrete interest related to the preferred return due to our partner in the Philadelphia IRS Campus transaction; and,

• increase of $0.3 million of interest on our Credit Facility due to a higher outstanding balance during 2011 compared to 2010.

Interest Expense - Amortization of Deferred Financing Costs

The increase in amortization of deferred financing costs of $1.2 million is mainly attributable to the acceleration of $0.8 million of deferred financing costs in connection with the mortgage debt prepayments we made during 2011. The remainder of the increase is due to the closing of the forward financing on the IRS Philadelphia Campus and Cira South Garage during the third quarter of 2010.

Equity in income of real estate ventures

The decrease in equity in income of real estate ventures of $1.5 million is primarily due to lower net income at the real estate venture properties during 2011 compared to 2010 and the recognition of $0.5 million of acquisition costs related to a real estate venture formed during the fourth quarter of 2011. These decreases were offset by $0.6 million of income from the sale of a building to one of the unconsolidated real estate ventures and by $0.5 million of preferred returns from the two unconsolidated real estate ventures in which we acquired a 25% interest during the third quarter of 2010 (see Note 4 of the notes to the consolidated financial statements for details of these two transactions).

Net gain on sales of interest in real estate

During the year ended December 31, 2011, we recognized a $2.8 million net gain upon the sale of the remaining 11% ownership interest in three properties that we partially sold to one of our unconsolidated Real Estate Ventures in December 2007. We had

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retained an 11% equity interest in these properties subject to a put/call at fixed prices for a period of three years from the time of the sale. In January 2011, we exercised the put/call which then transferred full ownership in the three properties to the Real Estate Venture. Accordingly, our direct continuing involvement through our 11% interest in the properties ceased as a result of the transfer of the ownership interest.

Gain (loss) on early extinguishment of debt

During 2011, we repurchased (i) $23.7 million of our 5.750% Guaranteed Notes due 2012 and (ii) $22.7 million of our 7.500% Guaranteed Notes due 2015, which resulted in a net loss on early extinguishment of debt of $3.3 million. The loss was offset by the write-off of the unamortized fixed-rate debt premium of $0.5 million related to the prepayment of two of our mortgage loans during 2011.

During 2010, we repurchased (i) $68.1 million of our $345.0 million 3.875% Exchangeable Notes, (ii) $1.9 million of our $300.0 million 5.625% Guaranteed Notes due 2010 and (iii) $12.6 million of our $300.0 million 5.750% Guaranteed Notes due 2012 which resulted in a net loss on early extinguishment of debt of $2.2 million. The net loss was offset by a gain from the write-off of the remaining premium on the Plymouth Meeting Executive Campus ("PMEC") note at the time of pay-off of $0.1 million resulting in an aggregate net loss on early extinguishment of debt of $2.1 million.

Discontinued Operations

During 2011, we sold three properties in Marlton, New Jersey, and one property in Exton, PA. These properties had total revenues of $5.0 million, operating expense of $2.3 million and $1.4 million of depreciation and amortization expense. We recognized a gain on sale of these properties of $7.3 million.

The amounts for the year ended December 31, 2010 are reclassified to include the operations of the properties sold during the twelve months period ended December 31, 2011 , as well as all properties that were sold through the year ended December 31, 2010 . Therefore, the discontinued operations amount for the twelve-month period ended December 31, 2010 includes total revenue of $13.3 million, operating expenses of $6.4 million and depreciation and amortization expense of $4.2 million.

Net Loss

Net loss decreased by $12.9 million from the twelve-month period ended December 31, 2010 as a result of the factors described above. Net income is significantly impacted by depreciation of operating properties and amortization of acquired intangibles. These non-cash charges do not directly affect our ability to pay dividends. Such charges can be expected to continue until lease intangibles are fully amortized. These intangibles are amortizing over the related lease terms or estimated duration of the tenant relationship.

Loss per Common Share

Loss per share (basic and diluted) was $(0.10) for the twelve-month period ended December 31, 2011 as compared to loss per share of $(0.19) for the twelve-month period ended December 31, 2010 as a result of the factors described above and an increase in the average number of common shares outstanding. The increase in the average number of common shares outstanding is primarily due to issuances pursuant to the Offering Program in 2011 and the redemption of 7.1 million of redeemable limited partnership units in exchange for our common shares (see Notes 12 and 13 for additional information).

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RESULTS OF OPERATIONS

Comparison of the Year Ended December 31, 2010 to the Year Ended December 31, 2009

The table below shows selected operating information for the “Same Store Property Portfolio” and the “Total Portfolio.” The Same Store Property Portfolio consists of 223 properties containing an aggregate of approximately 22.3 million net rentable square feet that we owned for the entire twelve-month periods ended December 31, 2010 and 2009 . The Same Store Property Portfolio includes properties acquired or placed in service on or prior to January 1, 2009 and owned through December 31, 2010. The Total Portfolio includes the effects of other properties that were either placed into service, acquired or redeveloped after January 1, 2009 or disposed prior to December 31, 2010.This table also includes a reconciliation from the Same Store Property Portfolio to the Total Portfolio net income (i.e., all properties owned by us during the twelve-month periods ended December 31, 2010 and 2009 ) by providing information for the properties which were acquired, under development (including lease-up assets) or placed into service and administrative/elimination information for the twelve-month periods ended December 31, 2010 and 2009 (in thousands).

The Total Portfolio net income presented in the table is equal to the net income of Brandywine Realty Trust and Brandywine Operating Partnership.

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Comparison of twelve-months ended December 31, 2010 to the twelve-months ended December 31, 2009 :

(dollars in thousands)	Same Store Property Portfolio — 2010	2009	Increase/ (Decrease)		Acquired/Completed Properties — 2010		2009		Development/Redevelopment Properties (a) — 2010	2009		Other/ (Eliminations) (b) — 2010		2009		Total Portfolio — 2010		2009		Increase/ (Decrease)
Revenue:
Cash rents	$ 425,787	$ 439,381	$ (13,594	)	$ 13,665		$ 9,202		$ 9,626	$ 3,985		$ (2,544	)	$ 4,839		$ 446,534		$ 457,407		$ (10,873	)
Straight-line rents	10,595	7,995	$ 2,600		1,954		810		1,125	(146	)	—		33		13,674		8,692		4,982
Above/below market rent amortization	5,574	6,542	$ (968	)	417		508		—	(379	)	—		—		5,991		6,671		(680	)
Total rents	441,956	453,918	(11,962	)	16,036		10,520		10,751	3,460		(2,544	)	4,872		466,199		472,770		(6,571	)
Tenant reimbursements	72,762	74,023	(1,261	)	3,359		2,197		2,260	557		393		1,420		78,774		78,197		577
Termination fees	5,553	2,387	3,166		107		—		106	1,214		—		—		5,766		3,601		2,165
Third party management fees, labor reimbursement and leasing	—	—	—		—		—		—	—		11,830		17,151		11,830		17,151		(5,321	)
Other	2,555	1,913	642		539		188		15	125		1,219		1,113		4,328		3,339		989
Total revenue	522,826	532,241	(9,415	)	20,041		12,905		13,132	5,356		10,898		24,556		566,897		575,058		(8,161	)
Property operating expenses	165,283	160,917	4,366		9,853		5,927		3,137	1,813		(8,122	)	(3,486	)	170,151		165,171		4,980
Real estate taxes	50,189	54,074	(3,885	)	2,840		1,235		550	526		865		1,258		54,444		57,093		(2,649	)
Third party management expenses	—	—	—		—		—		—	—		5,866		7,996		5,866		7,996		(2,130	)
Net Operating Income	307,354	317,250	(9,896	)	7,348		5,743		9,445	3,017		12,289		18,788		336,436		344,798		(8,362	)
General & administrative expenses	1	—	1		281		—		23	—		23,001		20,821		23,306		20,821		2,485
Depreciation and amortization	191,040	188,776	2,264		11,535		7,457		5,089	3,741		5,111		5,889		212,775		205,863		6,912
Operating Income (loss)	$ 116,313	$ 128,474	$ (12,161	)	$ (4,468	)	$ (1,714	)	$ 4,333	$ (724	)	$ (15,823	)	$ (7,922	)	$ 100,355		$ 118,114		$ (17,759	)
Number of properties	223	223			6		6		4	4						233		233
Square feet	22,282	22,282			1,734		1,734		1,618	1,618						25,634		25,634
Other Income (Expense):
Interest income																3,222		2,499		723
Interest expense																(132,640	)	(135,740	)	3,100
Interest expense — Deferred financing costs																(3,770	)	(5,864	)	2,094
Recognized hedge activity																—		(916	)	916
Equity in income of real estate ventures																5,305		4,069		1,236
Gain on early extinguishment of debt																(2,110	)	23,177		(25,287	)
Income (loss) from continuing operations																(29,638	)	5,339		(34,977	)
Income from discontinued operations																12,032		2,750		9,282
Net Income (Loss)																$ (17,606	)	$ 8,089		$ (25,695	)
Earnings (Loss) per common share																$ (0.19	)	$ —		$ (0.19	)

EXPLANATORY NOTES

(a) - Results include: two developments and two redevelopment properties.

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(b) - Represents certain revenues and expenses at the corporate level as well as various intercompany costs that are eliminated in consolidation and third-party management fees.

Total Revenue

Cash rents from the Total Portfolio decreased by $10.9 million from 2009 to 2010 , primarily reflecting:

• decrease of $13.6 million of rental income at the same store portfolio as a result of the decrease in same store occupancy of 320 basis points;

• decrease of $7.3 million due to the deconsolidation of three of our real estate ventures as a result of the adoption of the new accounting standard for the consolidation of variable interest entities beginning January 1, 2010 during the first quarter of 2010. This standard does not require retrospective adoption;

• decrease of $3.9 million of rental income due to the decrease in occupancy at three redevelopment properties that we recently placed in service; and

• an offsetting increase of $13.9 million of rental income due to our acquisition of Three Logan Square and the completion and placement in service of the IRS Philadelphia Campus and the Cira South Garage during the third quarter of 2010.

Straight-line rents at the Total Portfolio increased by $5.0 million due to $1.1 million of straight-line rents from the acquisition of Three Logan Square during the third quarter of 2010. The remainder of the increase is due to leases that commenced during the year of 2010 with free rent periods at our same store properties and at one of our redevelopment properties.

Tenant reimbursements increased by $0.6 million from 2009 to 2010 primarily due to the significant number of leases which include base year operating expense recovery calculations that reached their base year amounts quicker in 2010 than in 2009. Lease structure, the significant northeast snowfall expenses in the first quarter of 2010, as well as the deferral to later months and timing of the repairs and maintenance expenses in the second quarter of 2009, resulted in the base year leases achieving their base year amounts earlier in 2010 than in 2009. This is consistent with the increase in property operating expenses.

The increase in termination fees of $2.2 million from 2009 to 2010 is mainly due to increased tenant move-outs during 2010 which is consistent with the decrease in occupancy noted above.

Third party management fees, labor reimbursement and leasing decreased by $5.3 million from 2009 to 2010 mainly due to the termination of third party management contracts during the course of 2009 totaling 4.3 million square feet. This is consistent with the decrease in third party management fees. This decrease was off-set by the Company no longer eliminating third party management fee income related to two of our real estate ventures of $0.4 million in 2010.

Other Income

Other Income increased by $1.0 million mainly as a result of additional construction management fee income of $0.5 million from our agreement with the GSA relating to the IRS Philadelphia Campus. In addition, we received $0.4 million of proceeds from bankruptcy settlements with two of our former tenants and $0.1 million from a new energy efficiency rebate program in 2010.

Property Operating Expenses

Property operating expenses increased by $5.0 million mainly due to our acquisition of Three Logan Square and the completion and placement in service of the IRS Philadelphia Campus and the Cira South Garage during the third quarter of 2010 totaling $5.3 million of additional expenses. In addition, we incurred higher snow removal and repairs and maintenance expenses totaling $2.1 million during 2010 compared to 2009. This net increase was offset by a decrease of $2.7 million in bad debt expense during 2010 as compared to 2009.

Real Estate Taxes

Real estate taxes decreased by $2.6 million mainly due to lower taxes assessed on our properties during 2010 compared to 2009 and refunds related to prior years, offset by additional real estate taxes due to our acquisition of Three Logan Square during the third quarter of 2010.

General & Administrative Expenses

General and Administrative Expense increased by $2.5 million primarily due to:

• an increase of $0.8 million in amortization of stock-based compensation as a result of stock option and restricted stock performance units granted in March 2010;

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• an increase of $1.4 million in salaries, bonus and recruiting fees due to new hires during 2010;

• a $0.2 million one-time bonus payment made during 2010; and

• a net increase of $0.1 million as a result of various corporate level expenses during 2010, none of which were individually significant.

Depreciation and Amortization Expense

Depreciation and amortization increased by $6.9 million from 2009 to 2010 , primarily due to our depreciation and amortization expense on assets placed in service since 2009, particularly Three Logan Square and the IRS Philadelphia Campus which totaled $8.2 million of depreciation and amortization expense. During 2010, we also recorded $1.2 million of depreciation related to 2009 and prior years principally with respect to completed projects that were not closed out of our job cost system timely. This net increase was off-set by a decrease in depreciation and amortization expense from assets written-off related to early move-outs and fully amortized assets when comparing 2010 to 2009.

Provision for Impairment on Real Estate

During our first quarter 2009 impairment review, we determined that one of the properties tested for impairment under the held and used model had a historical cost greater than the probability weighted undiscounted cash flows. Accordingly, the recorded amount was reduced to an amount based on management’s estimate of its fair value.

Interest Expense

The decrease in interest expense of $3.1 million is primarily due to the following:

• a decrease of $14.6 million resulting from our buybacks of various unsecured notes subsequent to 2009. The details of the various purchases completed during 2010 are noted in the (Loss) gain on early extinguishment of debt section below;

• a decrease of $5.5 million resulting from the pay-off of an unsecured note at maturity during the fourth quarter of 2009;

• a decrease of $0.4 million resulting from lower weighted average interest rates on our $183.0 million term loan and our three Preferred Trust borrowings. Such borrowings have variable interest rates and a portion of such borrowings are swaps which matured early in the quarters; and

• an increase of $1.5 million in capitalized interest as a result of the increase in cumulative spending on development projects in 2010 compared to 2009.

The above described decrease of $22.0 million was offset by an increase of $14.3 million from the sale of $250.0 million of unsecured notes in the third quarter of 2009 and a net increase of $3.4 million resulting from a higher outstanding mortgage notes payable balance as of December 31, 2010 compared to December 31, 2009. We also had an increase of $0.5 million in interest expense related to the interest accretion of the Two Logan Square $2.9 million future liability (expected to be settled in 2019). In addition, there was an increase of $0.6 million in interest expense related to the estimated equity interest payments as a result of our partnership in the IRS Philadelphia Campus.

Deferred financing costs decreased by $2.1 million mainly due to the acceleration of such expenses incurred from greater debt repurchase activities during the 2009 compared to the 2010 offset by deferred financing costs amortized relating to the forward financing on the IRS Philadelphia Campus and Cira South Garage.

Recognized hedge activity

During 2009, we recorded a $1.1 million mark to market adjustment relating to two of our swaps that were applied to our September 2009 offering of $250.0 million 7.50% senior unsecured notes due 2015. The swaps no longer qualified for hedge accounting upon completion of this offering as the hedging relationship was terminated. Accordingly, the changes in the fair value of the swaps were reflected in our statement of operations until they were settled in cash in December 2009. We paid $5.1 million to terminate these swaps. We also recorded a net $0.1 million of income related to the write-off of AOCI and the ineffective portion of certain of our hedges.

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Equity in income of real estate ventures

The increase in equity in income of real estate venture from 2009 to 2010 was mainly due to a distribution in 2010 of $0.6 million of sales proceeds that were held in escrow until resolution of certain contingencies arising from the sale of the property held by the Five Tower Bridge partnership. The remainder of the increase is the result of normal operating activities at the partnership level, and includes $0.1 million of preferred return pick-up from our ownership in a newly created real estate venture with Thomas Properties Group (Commerce Square).

Gain on early extinguishment of debt

During 2010, we repurchased (i) $68.1 million of our $345.0 million 3.875% Exchangeable Notes, (ii) $1.9 million of our $300.0 million 5.625% Guaranteed Notes due 2010 and (iii) $12.6 million of our $300.0 million 5.750% Guaranteed Notes due 2012 which resulted in a net loss on early extinguishment of debt of $2.2 million. The net loss was off-set by a gain from the write-off of the remaining premium on the PMEC note at the time of pay-off of $0.1 million resulting in an aggregate net loss on early extinguishment of debt of $2.1 million.

During 2009, we repurchased $154.1 million of our $345.0 million 3.875% Exchangeable Notes, $94.1 million of our $275.0 million 4.500% Guaranteed Notes due 2009, $77.0 million of our $300.0 million 5.625% Guaranteed Notes due 2010, $112.2 million of our $300.0 million 5.750% Guaranteed Notes due 2012 and $7.3 million of our $250.0 million 5.400% Guaranteed Notes due 2014 which resulted in a net gain on early extinguishment of debt of $23.2 million. The gain on early extinguishment of debt is inclusive of adjustments made to reflect our adoption of the new accounting standard for convertible debt instruments.

Discontinued Operations

During 2010, we sold one property in Richmond, VA, one property in Exton, PA, one property in King of Prussia, PA, one property in Austin, TX, and four properties in Marlton, NJ. These properties had total revenue of $6.4 million, operating expenses of $3.3 million, depreciation and amortization expenses of $2.0 million and gain on sale of $11.0 million.

The December 31, 2009 amounts are reclassified to include the operations of the properties sold during the twelve months period ended December 31, 2010, as well as all properties that were sold through the year ended December 31, 2009. Therefore, the discontinued operations amount for the twelve-months period ended December 31, 2009 includes total revenue of $20.6 million, operating expenses of $10.6 million and depreciation and amortization expense of $4.9 million. During the 2009, we also recognized a provision for impairment of $3.7 million on a property that was sold during the second quarter of 2009.

Net Income (Loss)

Net income decreased by $25.7 million from the twelve-month period ended December 31, 2009 as a result of the factors described above. Net income is significantly impacted by depreciation of operating properties and amortization of acquired intangibles. These non-cash charges do not directly affect our ability to pay dividends. Such charges can be expected to continue until lease intangibles are fully amortized. These intangibles are amortizing over the related lease terms or estimated duration of the tenant relationship.

Earnings (loss) per Common Share

Loss per share (basic and diluted) was $(0.19) for the twelve-month period ended December 31, 2010 as compared to earnings per share of $0.00 for the twelve-month period ended December 31, 2009 as a result of the factors described above and an increase in the average number of common shares outstanding. The increase in the average number of common shares outstanding is primarily due to the commencement of the continuous equity Offering Program in March 2010 and the result of the $242.3 million public equity offering of 40,250,000 shares during the second quarter of 2009.

LIQUIDITY AND CAPITAL RESOURCES OF THE PARENT COMPANY

The Parent Company conducts its business through the Operating Partnership and its only material asset is its ownership of the partnership interests of the Operating Partnership. The Parent Company, other than acting as the sole general partner of the Operating Partnership, issues public equity from time to time and guarantees the debt obligations of the Operating Partnership. The Parent Company’s principal funding requirement is the payment of dividends on its common shares and preferred shares. The Parent Company’s principal source of funding for its dividend payments is the distributions it receives from the Operating Partnership.

As of December 31, 2011 , the Parent Company owned a 98.1% interest in the Operating Partnership. The remaining 1.9% interest consists of common units of limited partnership interest owned by non-affiliated investors. As the sole general partner of the

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Operating Partnership, the Parent Company has full and complete authority over the Operating Partnership’s day-to-day operations and management.

The Parent Company’s principal source of capital is from the distributions it receives from the Operating Partnership. The Parent Company believes that the Operating Partnership’s sources of working capital, particularly its cash flows from operations and borrowings available under its Credit Facility, are adequate for it to make its distributions to the Parent Company, which in turn will enable the Parent Company to make dividend payments to its shareholders.

The Parent Company receives proceeds from equity issuances from time to time, and contributes the proceeds from its equity issuances to the Operating Partnership in exchange for partnership units of the Operating Partnership. The Parent Company’s ability to sell common shares and preferred shares is dependent on, among other things, general market conditions for REITs, market perceptions about the Company as a whole and the current trading price of its shares. The Parent Company regularly analyzes which source of capital is most advantageous to it at any particular point in time. In March 2010, the Parent Company commenced a continuous equity Offering Program, under which it may sell up to an aggregate amount of 15,000,000 common shares until March 10, 2013 in amounts and at times to be determined by the Parent Company. Actual sales will depend on a variety of factors to be determined by the Parent Company, including market conditions, the trading price of its common shares and determinations by the Parent Company of the appropriate sources of funding. In conjunction with the Offering Program, the Parent Company engaged sales agents who received compensation, in aggregate, of up to 2% of the gross sales price per share. During the the twelve months ended December 31, 2011 , the Parent Company sold 679,285 shares under this program at an average sales price of $ 12.18 per share resulting in net proceeds of $ 8.0 million . The Parent Company contributed the net proceeds from the sales to the Operating Partnership, which the Operating Partnership in turn used to reduce borrowings under the Credit Facility and for general corporate purposes. From its inception through December 31, 2011, the Parent Company had sold 6,421,553 shares under this program, leaving 8,578,447 shares available for sale.

On December 13, 2011 , the Parent Company declared a distribution of $0.15 per common share, totaling $ 21.5 million , which it paid on January 19, 2012 to its shareholders of record as of January 5, 2012 . In addition, the Parent Company declared distributions on its Series C Preferred Shares and Series D Preferred Shares to holders of record as of December 30, 2011 . These shares are entitled to a preferential return of 7.50% and 7.375% , respectively. Distributions paid on January 17, 2012 to holders of Series C Preferred Shares and Series D Preferred Shares totaled $ 0.9 million and $ 1.1 million , respectively.

The Parent Company also maintains a share repurchase program under which its Board of Trustees has authorized the Parent Company to repurchase its common shares from time to time. As of December 31, 2011 , there were approximately 0.5 million shares remaining to be repurchased under this program. The Parent Company’s Board of Trustees has not limited the duration of the program; however, it may be terminated at any time.

Together with the Operating Partnership, the Parent Company maintains a shelf registration statement that has registered common shares, preferred shares, depositary shares and warrants and unsecured debt securities. Subject to the Company’s ongoing compliance with securities laws, and if warranted by market conditions, the Company may offer and sell equity and debt securities from time to time under the shelf registration statement.

The Parent Company unconditionally guarantees the Operating Partnership’s unsecured debt obligations which as of December 31, 2011 amounted to $1,888.1 million . If the Operating Partnership fails to comply with its debt requirements, the Parent Company will be required to fulfill the Operating Partnership's commitments under such guarantees. As of December 31, 2011 , the Operating Partnership is in compliance with all of its debt covenant and requirement obligations.

In order to maintain its qualification as a REIT, the Parent Company is required to, among other things, pay dividends to its shareholders of at least 90% of its REIT taxable income. The Parent Company has historically satisfied this requirement.

Overall, the liquidity of the Parent Company is dependent on the Operating Partnership’s ability to make distributions to the Parent Company. However, there can be no assurance that the Operating Partnership’s sources of capital will continue to be available to meet its working capital needs including its ability to make distributions to the Parent Company. In cases where the Operating Partnership is faced with working capital problems or would need to raise capital to fund acquisitions and developments, the Parent Company will have to consider alternative sources to increase liquidity, including, among other things, equity issuances through its existing Offering Program, advances under its Credit Facility and sales of properties.

LIQUIDITY AND CAPITAL RESOURCES OF THE OPERATING PARTNERSHIP

General

The Operating Partnership’s principal liquidity needs for the next twelve months are as follows:

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• fund normal recurring expenses,

• fund capital expenditures, including capital and tenant improvements and leasing costs,

• fund repayment of certain debt instruments when they mature,

• fund potential development and redevelopment costs, and

• fund distributions to the Parent Company.

The Operating Partnership believes that with the uncertain economic conditions, vacancy rates may continue to increase, effective rental rates on new and renewed leases may continue to decrease and tenant installation costs, including concessions, may continue to increase in most or all of its markets in 2012 and possibly beyond. As a result, the Operating Partnership’s revenue from the overall reduced demand for office space, and its cash flow could be insufficient to cover increased tenant installation costs over the short-term. If this situation were to occur, the Operating Partnership expects that it would finance cash deficits through borrowings under our Credit Facility and other debt and equity financings.

The Operating Partnership believes that its liquidity needs will be satisfied through cash flows generated by operations, financing activities and selective property sales. Rental revenue, expense recoveries from tenants, and other income from operations are its principal sources of cash used to pay operating expenses, debt service, recurring capital expenditures and the minimum distributions required to maintain its REIT qualification. The Operating Partnership seeks to increase cash flows from its properties by maintaining quality standards for its properties that promote high occupancy rates and permit increases in rental rates while reducing tenant turnover and controlling operating expenses. The Operating Partnership’s revenue also includes third-party fees generated by its property management, leasing, development, and construction businesses. The Operating Partnership believes that its revenue, together with proceeds from property sales and debt financings, will continue to provide funds for its short-term liquidity needs. However, material changes in its operating or financing activities may adversely affect its net cash flows. Such changes, in turn, would adversely affect its ability to fund distributions to the Parent Company, debt service payments and tenant improvements. In addition, a material adverse change in its cash provided by operations would affect the financial performance covenants under the Credit Facility, unsecured term loan and unsecured notes.

Financial markets have experienced unusual volatility and uncertainty. The Operating Partnership’s ability to fund future development projects, as well as its ability to repay or refinance debt maturities could be adversely affected by its inability to secure financing at reasonable terms beyond those already completed. It is possible, in these unusual and uncertain times that one or more lenders in its Credit Facility could fail to fund a borrowing request. Such an event could adversely affect its ability to access funds from its Credit Facility when needed.

The Operating Partnership's liquidity management remains a priority. The Operating Partnership regularly pursues new financing opportunities to ensure an appropriate balance sheet position. As a result of these dedicated efforts, the Operating Partnership is comfortable with its ability to meet future debt maturities and development or property acquisition funding needs. The Operating Partnership believes that its current balance sheet is in an adequate position at the date of this filing, despite the volatility in the credit and financial markets.

On December 15, 2011 , the Parent Company and the Operating Partnership entered into binding agreements for lender commitments related a new $600.0 million four -year unsecured credit facility and three unsecured term loans in the same aggregate amount of $600.0 million , consisting of a $150.0 million three-year loan, a $250.0 million four-year loan and a $200.0 million seven-year loan. The Parent Company and the Operating Partnership closed on the new credit facility and term loans (referred to earlier in this Form 10-K as our "New Credit Facility" and "New Term Loans," respectively) on February 1, 2012 and used the proceeds from the initial advances under the New Term Loans to repay all balances outstanding under, and concurrently terminate, the Prior Credit Facility and Prior Term Loan. The New Credit Facility has terms that are generally comparable to those under the Prior Credit Facility.

On April 5, 2011 , the Operating Partnership closed a registered offering of $325.0 million in aggregate principal amount of its 4.95% senior unsecured notes due 2018 . The notes were priced at 98.907% of their face amount with an effective interest rate of 5.137% . The net proceeds, which amounted to $318.9 million after deducting underwriting discounts and offering expenses, were used to repay indebtedness under the Credit Facility and for general corporate purposes.

During 2011, the Parent Company contributed $8.0 million in net proceeds from the sale of 679,285 of its common shares under the Offering Program to the Operating Partnership in exchange for the issuance of 679,285 common partnership units to the Parent Company. The Operating Partnership used the net proceeds contributed by the Parent Company to reduce borrowings under the Credit Facility and for general corporate purposes.

The Operating Partnership uses multiple financing sources to fund its long-term capital needs. It uses its Credit Facility for general business purposes, including the acquisition, development and redevelopment of properties and the repayment of other debt. It

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will also consider obtaining debt secured by properties within its portfolio as necessary, where it may be in its best interest to obtain a secured mortgage.

The Operating Partnership’s ability to incur additional debt is dependent upon a number of factors, including its credit ratings, the value of its unencumbered assets, its degree of leverage and borrowing restrictions imposed by its current lenders. If more than one rating agency were to downgrade its credit rating, its access to capital in the unsecured debt market would be more limited and the interest rate under its existing Credit Facility and the term loan would increase.

The ability of the Parent Company and the Operating Partnership to sell their equity securities is dependent on, among other things, general market conditions for REITs, market perceptions about the Company and the current trading price of the Parent Company’s shares. The Parent Company contributes the proceeds it receives from its equity issuances to the Operating Partnership in exchange for partnership units of the Operating Partnership in accordance with the Operating Partnership’s partnership agreement. The Operating Partnership uses the net proceeds from the sales contributed by the Parent Company to reduce borrowings under the Credit Facility and for general corporate purposes. The Operating Partnership, from time to time, also issues its own partnership units as consideration for property acquisitions and developments.

The Operating Partnership will also consider sales of selected Properties as another source of managing its liquidity. Asset sales during 2010 and through 2011 have been a source of cash. During 2011 , we sold four properties containing 0.4 million in net rentable square feet for net cash proceeds of $34.8 million . During 2011, the Company also contributed three properties, containing 0.6 million net rentable square feet, to an unconsolidated joint venture and received, in addition to a 50% interest in the venture, net cash proceeds of $120.1 million. The Operating Partnership has used proceeds from asset sales to repay existing indebtedness, provide capital for its development activities and strengthen its financial condition. There is no guarantee that it will be able to raise similar or even lesser amounts of capital from future asset sales.

Cash Flows

The following summary discussion of the Operating Partnership’s cash flows is based on the consolidated statement of cash flows and is not meant to be an all-inclusive discussion of the changes in our cash flows for the periods presented.

As of December 31, 2011 and 2010 , the Operating Partnership maintained cash and cash equivalents of $0.4 million and $16.6 million, respectively. The following are the changes in cash flows from the Operating Partnership's activities for the years ended (in thousands):

Activity — Operating	2011 — $ 179,015		2010 — $ 185,127		2009 — $ 220,405
Investing	(47,931	)	(171,936	)	(102,549	)
Financing	(147,239	)	1,807		(120,213	)
Net cash flows	$ (16,155	)	$ 14,998		$ (2,357	)

The Operating Partnership’s principal source of cash flows is from the operation of its properties. The Operating Partnership does not restate its cash flow for discontinued operations.

The net decrease of $6.1 million in cash flows from operating activities of the Operating Partnership during the year ended December 31, 2011 compared to the year ended December 31, 2010 is primarily the result of the following:

• a decrease in average occupancy from 86.7% during the year ended December 31, 2010 to 85.3% during the year ended December 31, 2011 ;

• a decrease in the number of operating properties due to dispositions. We sold a total of four office properties and contributed three office properties to an unconsolidated real estate venture during 2011; and

• timing of cash receipts from our tenants and cash expenditures in the normal course of operations.

These decreases were offset by the following transactions:

• acquisition of Three Logan Square and the completion and placement in service of the IRS Philadelphia Campus and Cira South Garage during the third quarter of 2010, acquisition of Overlook I and II during the first quarter of 2011, the placement in service of the Juniper Street Parking Garage during the second quarter of 2011, and the acquisition of 3020 Market Street during the third quarter of 2011; and

• receipt of $27.4 million from the historic tax credit transaction in June 2010 and recognition of $12.0 million of the total contributions received as income during the third quarter of 2011.

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The net decrease of $124.0 million in cash flows used in investing activities of the Operating Partnership during the year ended December 31, 2011 compared to the year ended December 31, 2010 is primarily attributable to the following:

• increase in net proceeds from sales of properties of $105.9 million during the year ended December 31, 2011 when compared to the year ended December 31, 2010. The 2011 total net proceeds from sales of properties included $120.1 million from the sale of three properties to a newly formed unconsolidated real estate venture (see Note 3 to the consolidated financial statements for additional information);

• decreased capital expenditures for tenant and building improvements and leasing commissions by $34.8 million during the year ended December 31, 2011 compared to the year ended December 31, 2010. The decrease in capital expenditures mainly related to the completion of and placement in service of the IRS Philadelphia Campus and Cira South Garage during the third quarter of 2010 and of the Juniper Street Parking Garage during the second quarter of 2011;

• advances provided to certain tenants for purchase of tenant assets of $1.4 million during 2011 compared to advances made of $1.7 million in 2010.

• $0.8 million decrease related to a loan provided to an unconsolidated Real Estate Venture partner during 2010, with no comparable loan during 2011;

• decrease of $10.0 million of net cash paid related to acquisitions in 2011 compared to 2010 (see Note 3 to the consolidated financial statements for details);

• increase in cash distributions from unconsolidated Real Estate Ventures of $8.1 million during the year ended December 31, 2011 compared to the year ended December 31, 2010. Of this increase, $0.6 million pertains to a portion of the proceeds from the sale of a building of one of the unconsolidated Real Estate Ventures (see Footnote 4 of the notes to the consolidated financial statements); and

• decrease in cash of $1.4 million during the year ended December 31, 2010 due to the deconsolidation of variable interest entities last year.

The net increase in cash used in investing activities was partially offset by the following transactions:

• receipt of $40.0 million of proceeds from the repayment of a note receivable during 2010; and

• increase in investments in unconsolidated Real Estate Ventures of $0.1 million during 2011 when compared to 2010.

The net decrease of $149.0 million in cash used in financing activities of the Operating Partnership during the year ended December 31, 2011 compared to the year ended December 31, 2010 is mainly due to the following:

• decrease in proceeds from Credit Facility and mortgage notes payable of $115.1 million during the year ended December 31, 2011 compared to the year ended December 31, 2010;

• increase in repayments of the Credit Facility and mortgage notes payable of $309.4 million during the year ended December 31, 2011 compared to the year ended December 31, 2010;

• repayment of unsecured term loan of $145.5 million during 2011.

• net settlement of hedge transactions amounting to $0.6 million during the year ended December 31, 2011;

• increase in debt financing costs of approximately $3.6 million during the year ended December 31, 2011 compared to the year ended December 31, 2010;

• decrease in net proceeds received from the issuance of common shares of the Parent Company and exercise of stock options amounting to $62.6 million during the year ended December 31, 2011, compared to the issuances made during the year ended December 31, 2010;

• increase in distributions paid by the Parent Company to its shareholders and on non-controlling interests from $89.0 million during the year ended December 31, 2010 to $91.9 million during the year ended December 31, 2011; and

• receipt of refund of deferred financing costs related to forward commitment amounting to $1.7 million during the third quarter of 2010.

The net decrease in cash from financing activities described above was offset by the following:

• proceeds from our issuance of 4.950% Notes due 2018 during 2011 amounting to $321.5 million; and

• decrease in repayments of unsecured notes of $170.9 million during the year ended December 31, 2011 when compared to the year ended December 31, 2010.

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Capitalization

Indebtedness

The Operating Partnership is the issuer of our unsecured notes and the Parent Company has fully and unconditionally guaranteed the payment of principal and interest on the notes. During the year ended December 31, 2011 , the Operating Partnership repurchased $106.2 million of its unsecured Notes as summarized in the table below (excluding accrued interest, in thousands):

Notes	Repurchase Amount	Principal	Loss	Deferred Financing Amortization
2011 3.875% Notes	$ 59,835	$ 59,835	$ —	$ —
2012 5.750% Notes	24,749	23,709	868	32
2015 7.500% Notes	25,140	22,671	2,396	120
	$ 109,724	$ 106,215	$ 3,264	$ 152

As of December 31, 2011 , the Operating Partnership had approximately $2.4 billion of outstanding indebtedness. The table below summarizes the Operating Partnership’s mortgage notes payable, its unsecured notes and its Credit Facility at December 31, 2011 and December 31, 2010 :

	December 31, 2011	December 31, 2010
	(dollars in thousands)
Balance:
Fixed rate (includes variable swapped to fixed)	$ 2,061,728	$ 1,929,962
Variable rate — unhedged	338,774	504,610
Total	$ 2,400,502	$ 2,434,572
Percent of Total Debt:
Fixed rate (includes variable swapped to fixed)	85.9 %	79.3 %
Variable rate — unhedged	14.1 %	20.7 %
Total	100 %	100 %
Weighted-average interest rate at period end:
Fixed rate (includes variable swapped to fixed)	6.0 %	6.4 %
Variable rate — unhedged	1.1 %	1.6 %
Total	5.3 %	5.4 %

The variable rate debt shown above generally bears interest based on various spreads over a LIBOR term selected by the Operating Partnership.

The Operating Partnership uses Credit Facility borrowings for general business purposes, including the acquisition, development and redevelopment of properties and the repayment of other debt. It has the option to increase the maximum borrowings under its Credit Facility to $800.0 million subject to the absence of any defaults and its ability to obtain additional commitments from its existing or new lenders. For a discussion of the Company's New Credit Facility and New Unsecured Terms Loans, on which closing occurred on February 1, 2012, see "Item 1. Business - 2011 Transactions."

The interest rates incurred under the Credit Facility and our unsecured term loans are subject to modification depending on our rating status with qualified agencies.

As of December 31, 2011 , the Operating Partnership had $ 275.5 million of borrowings and $ 2.5 million of letters of credit outstanding under the then existing Credit Facility, leaving $ 322.0 million of unused availability. For the years ended December 31, 2011 and 2010 , the Operating Partnership’s weighted average interest rates, including the effects of interest rate hedges discussed in Note 7 to the consolidated financial statements included herein, and including both the New Credit Facility and the Credit Facility, were 0.99% and 1.03% per annum, respectively.

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The Credit Facility contains financial and non-financial covenants, including covenants that relate to the Operating Partnership’s incurrence of additional debt; the granting of liens; consummation of mergers and consolidations; the disposition of assets and interests in subsidiaries; the making of loans and investments; and the payment of dividends. The restriction on dividends permits the Operating Partnership to make distributions to the Parent Company based on the greater of (i) an amount required for the Parent Company to retain its qualification as a REIT and (ii) 95% of the Operating Partnership’s funds from operations. The Credit Facility also contains financial covenants that require the Operating Partnership to maintain an interest coverage ratio, a fixed charge coverage ratio, an unsecured debt ratio and an unencumbered cash flow ratio above certain specified minimum levels; to maintain net worth above an amount determined on a specified formula; and to maintain a leverage ratio and a secured debt ratio below certain maximum levels. Another financial covenant limits the ratio of unsecured debt to unencumbered properties. The Operating Partnership continuously monitors its compliance with the covenants. Certain of the covenants restrict the Operating Partnership’s ability to obtain alternative sources of capital. The Operating Partnership was in compliance with all covenants as of December 31, 2011 .

The indenture under which the Operating Partnership issued its unsecured Notes contains financial covenants, including (1) a leverage ratio not to exceed 60%, (2) a secured debt leverage ratio not to exceed 40%, (3) a debt service coverage ratio of greater than 1.5 to 1.0 and (4) an unencumbered asset value of not less than 150% of unsecured debt. The Operating Partnership was in compliance with all covenants as of December 31, 2011 .

The Operating Partnership has mortgage loans that are collateralized by certain of its Properties. Payments on mortgage loans are generally due in monthly installments of principal and interest, or interest only. The Operating Partnership intends to refinance or repay its mortgage loans as they mature through the use of proceeds from selective Property sales and secured or unsecured borrowings. However, in the current and future economic environment one or more of these sources may not be available on attractive terms or at all.

The Parent Company’s charter documents do not limit the amount or form of indebtedness that the Operating Partnership may incur, and its policies on debt incurrence are solely within the discretion of the Parent Company’s Board of Trustees, subject to financial covenants in the Credit Facility, indenture and other credit agreements.

As of December 31, 2011 , the Operating Partnership had guaranteed repayment of approximately $ 0.7 million of loans on behalf of one Real Estate Venture. See Item 2. Properties — Real Estate Ventures. The Operating Partnership also provides customary environmental indemnities and completion guarantees in connection with construction and permanent financing both for its own account and on behalf of certain of the Real Estate Ventures.

Equity

On December 13, 2011 , the Operating Partnership declared a distribution of $0.15 per Class A common unit, totaling $ 21.5 million , which was paid on January 19, 2012 to unitholders of record as of January 5, 2012 .

On December 13, 2011 , the Operating Partnership declared distributions on its Series D Preferred Mirror Units and Series E Preferred Mirror Units to holders of record as of December 30, 2011 . These units are entitled to a preferential return of 7.50% and 7.375% , respectively. Distributions paid on January 17, 2012 to holders of Series D Preferred Mirror Units and Series E Preferred Mirror Units totaled $ 0.9 million and $ 1.1 million , respectively.

On December 23, 2011, the Parent Company issued 7,111,112 of its common shares in exchange for an equal number of Class F (2010) Units of the Operating Partnership. The Class F (2010) Units were issued in August 2010 as part of our acquisition of an office property and were subject to redemption at the option of the holder after the first anniversary of the issuance. The Operating Partnership had the option to satisfy the redemption either for an amount, per unit, of cash equal to the market price of one of the Parent Company's common shares (based on the five-day trading average ending on the date of the exchange) or for one of the Parent Company's common shares for each unit redeemed. On December 23, 2011, the Operating Partnership satisfied in full BAT Partners, L.P.'s tender for redemption of all 7,111,112 of the Class F (2010) Units through the issuance of 7,111,112 Parent Company's common shares.

From the inception of the Offering Program in March 2010 through December 31, 2011 , the Parent Company contributed net proceeds of $ 8.0 million from the sale of 679,285 shares to the Operating Partnership in exchange for the issuance of 679,285 common partnership units to the Parent Company. The Operating Partnership used the net proceeds from the sales to reduce borrowings under the Credit Facility and for general corporate purposes.The Parent Company did not purchase any shares during the year ended December 31, 2011 and accordingly, during the year ended December 31, 2011 , the Operating Partnership did not repurchase any units in connection with the Parent Company’s share repurchase program.

Together with the Operating Partnership, the Parent Company maintains a shelf registration statement that has registered common

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shares, preferred shares, depositary shares and warrants and unsecured debt securities. Subject to the Company’s ongoing compliance with securities laws, if warranted by market conditions, the Company may offer and sell equity and debt securities from time to time under the shelf registration statement.

Short- and Long-Term Liquidity

The Operating Partnership believes that its cash flow from operations is adequate to fund its short-term liquidity requirements, excluding principal payments under its debt obligations. Cash flow from operations is generated primarily from rental revenues and operating expense reimbursements from tenants and management services income from providing services to third parties. The Operating Partnership intends to use these funds to meet short-term liquidity needs, which are to fund operating expenses, recurring capital expenditures, tenant allowances, leasing commissions, interest expense and the minimum distributions to the Parent Company required to maintain the Parent Company’s REIT qualification under the Code. The Operating Partnership expects to meet short-term scheduled debt maturities through borrowings under the Credit Facility and proceeds from asset dispositions. As of December 31, 2011 , the Operating Partnership has $1,888.1 million of unsecured debt and $512.4 million of mortgage debt of which $464.5 million and $12.4 million , respectively, are scheduled to mature through December 2012. The Operating Partnership extended the maturity date of the $183.0 million Term Loan from June 29, 2011 to June 29, 2012. On December 15, 2011 , the Parent Company and the Operating Partnership entered into binding agreements for lender commitments related to a New Credit Facility and the New Term Loan. The Company closed on the New Credit Facility and Term Loans on February 1, 2012 and used the initial advances under the New Term Loans to repay all balances outstanding under, and concurrently terminate, its prior Credit Facility and the prior Term Loan. For the remaining debt maturities, the Operating Partnership expects to have sufficient capacity under its New Credit Facility but it will also evaluate other listed sources to fund these maturities.

The Operating Partnership expects to meet its long-term liquidity requirements, such as for property acquisitions, development, investments in real estate ventures, scheduled debt maturities, major renovations, expansions and other significant capital improvements, through cash from operations, borrowings under the Credit Facility, additional secured and unsecured indebtedness, the issuance of equity securities, contributions from joint venture investors and proceeds from asset dispositions.

Many commercial real estate lenders have stricter underwriting standards or have withdrawn from the lending marketplace. Current global economic sluggishness has impacted liquidity in the debt markets, making financing terms less attractive, and in certain cases have resulted in the unavailability of certain types of debt financing. As a result, the Operating Partnership expects that borrowing costs on new and refinanced debt could be more expensive. Moreover, the volatility in the financial markets, in general, will make it more difficult or costly, for it to raise capital through the issuance of common stock, preferred stock or other equity instruments or through public issuances of debt securities from its shelf registration statement as it has been able to do in the past. Such conditions would also limit its ability to raise capital through asset dispositions at attractive prices or at all.

Off-Balance Sheet Arrangements

We are not dependent on any off-balance sheet financing arrangements for liquidity. Our off-balance sheet arrangements are discussed in Note 4 to the financial statements, “Investment in Unconsolidated Real Estate Ventures”. Additional information about the debt of our unconsolidated Real Estate Ventures is included in “Item 2. Properties”.

Inflation

A majority of the Operating Partnership’s leases provide for tenant reimbursement of real estate taxes and operating expenses either on a triple net basis or over a base amount. In addition, many of its office leases provide for fixed base rent increases. The Operating Partnership believes that inflationary increases in expenses will be partially offset by expense reimbursement and contractual rent increases.

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Commitments and Contingencies

The following table outlines the timing of payment requirements related to the Operating Partnership’s contractual commitments as of December 31, 2011 :

	Payments by Period (in thousands) — Total	Less than 1 Year	1-3 Years	3-5 Years	More than 5 Years
Mortgage notes payable (a)	$ 512,391	$ 12,398	$ 78,912	$ 196,961	$ 224,120
Revolving credit facility	275,500	275,500	—	—	—
Unsecured term loan	37,500	37,500	—	—	—
Unsecured debt (a)	1,575,111	151,491	242,681	777,329	403,610
Ground leases (b)	298,712	1,818	5,545	5,727	285,622
Interest expense (c)	599,101	112,737	210,516	155,185	120,663
Development contracts (d)	138	138	—	—	—
Other liabilities (e)	10,378	—	—	—	10,378
	$ 3,308,831	$ 591,582	$ 537,654	$ 1,135,202	$ 1,044,393

(a) Amounts do not include unamortized discounts and/or premiums.

(b) Future minimum rental payments under the terms of all non-cancelable ground leases under which we are the lessee are expensed on a straight-line basis regardless of when payments are due. The table above does not include the future minimum annual rental payments related to the ground lease that we assumed in connection with the acquisition of Three Logan Square as the amounts cannot be determined at this time. The table also does not include the future minimum rental payments related to the ground lease in connection with our acquisition of an office building in Philadelphia, Pennsylvania during 2011. Both of these ground leases are discussed below.

(d) Represents contractual obligations for certain development projects and does not contemplate all costs expected to be incurred. to be incurred for such developments

(e) Other liabilities consists of deferred compensation liability and existing interest accretion on Two Logan Square (see related discussion below), as of December 31, 2011.

The Operating Partnership obtained ground tenancy rights under a long term ground lease agreement when it acquired Three Logan Square on August 5, 2010. The annual rental payment under this ground lease is ten dollars through August 2022, which is when the initial term of the ground lease will end. After the initial term, the Operating Partnership has various options to renew the lease until 2091. The Operating Partnership also obtained the option to purchase the land at fair market value after providing a written notice to the owner. The annual rental payment after 2022 will be adjusted at the lower of $3.0 million or the prevailing market rent at that time until 2030. Subsequent to 2030, the annual rental payment will be adjusted at the lower of $4.0 million or the prevailing market rent at that time until 2042 and at fair market value until 2091. The Operating Partnership believes that based on conditions as of the date the lease was assigned (August 5, 2010), the lease will reset to market after the initial term. Using the estimated fair market rent as of the date of the acquisition over the extended term of the ground lease (assuming the purchase option is not exercised), the future payments will aggregate to $27.4 million. The Operating Partnership has not included the amounts in the table above since such amounts are not fixed and determinable. The Operating Partnership also acquired ground tenancy rights under a long term ground lease agreement related to its acquisition of an office building in Philadelphia, Pennsylvania on August 12, 2011. The annual rental payments under this ground lease are equal to a percentage of the NOI generated by the property. The Company has not included the amounts in the table above since such amounts are not fixed or determinable.

As part of the Operating Partnership's September 2004 acquisition of a portfolio of properties from the Rubenstein Company (which the Operating Partnership refers to as the “TRC acquisition”), the Operating Partnership acquired its interest in Two Logan Square, a 708,844 square foot office building in Philadelphia, primarily through its ownership of a second and third mortgage secured by this property. This property is consolidated as the borrower is a variable interest entity and the Operating Partnership, through its ownership of the second and third mortgages, is the primary beneficiary. It currently does not expect to take title to Two Logan Square until, at the earliest, September 2019. If the Operating Partnership takes fee title to Two Logan Square upon a foreclosure of its mortgage, the Operating Partnership has agreed to pay an unaffiliated third party that holds a residual interest in the fee owner of this property an amount equal to $2.9 million. On the TRC acquisition date, the Operating Partnership recorded a liability of $0.7 million and this amount will accrete up to $2.9 million through September 2019. As of December 31, 2011 , the Operating Partnership has a balance of $1.3 million for this liability on its consolidated balance sheet.

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The Operating Partnership has been audited by the Internal Revenue Service (the “IRS”) for its 2004 tax year. The audit concerned the tax treatment of the TRC acquisition in September 2004 in which the Operating Partnership acquired a portfolio of properties through the acquisition of a limited partnership. On December 17, 2010, the Operating Partnership received notice that the IRS proposed an adjustment to the allocation of recourse liabilities allocated to the contributor of the properties. The Operating Partnership has appealed the proposed adjustment. The proposed adjustment, if upheld, would not result in a material tax liability for the Operating Partnership. However, an adjustment could raise a question as to whether a contributor of partnership interests in the 2004 transaction could assert a claim against the Operating Partnership under the tax protection agreement entered into as part of the transaction.

As part of the Operating Partnership's 2006 Prentiss merger, the 2004 TRC acquisition and several of its other transactions, it agreed not to sell certain of the properties it acquired in transactions that would trigger taxable income to the former owners. In the case of the TRC acquisition, the Operating Partnership agreed not to sell acquired properties for periods up to 15 years from the date of the TRC acquisition as follows at December 31, 2011 : One Rodney Square and 130/150/170 Radnor Financial Center (January, 2015); and One Logan Square, Two Logan Square and Radnor Corporate Center (January, 2020). In the Prentiss acquisition, the Operating Partnership assumed the obligation of Prentiss not to sell Concord Airport Plaza before March, 2018. The Operating Partnership's agreements generally provide that we may dispose of the subject properties only in transactions that qualify as tax-free exchanges under Section 1031 of the Internal Revenue Code or in other tax deferred transactions. If the Operating Partnership was to sell a restricted property before expiration of the restricted period in a non-exempt transaction, it would be required to make significant payments to the parties who sold the applicable property to the Operating Partnership for tax liabilities triggered to them.

As part of the Operating Partnership’s acquisition of properties from time to time in tax-deferred transactions, it has agreed to provide certain of the prior owners of the acquired properties the right to guarantee its indebtedness. If the Operating Partnership were to seek to repay the indebtedness guaranteed by the prior owner before the expiration of the applicable agreement, it would be required to provide the prior owner an opportunity to guarantee a qualifying replacement debt. These debt maintenance agreements may limit the Operating Partnership's ability to refinance indebtedness on terms that will be favorable to the Operating Partnership.

In connection with the development of the IRS Philadelphia Campus and the Cira South Garage, during 2008, the Operating Partnership entered into a historic tax credit and new markets tax credit arrangement, respectively. The Operating Partnership is required to be in compliance with various laws, regulations and contractual provisions that apply to its historic and new market tax credit arrangements. Non-compliance with applicable requirements could result in projected tax benefits not being realized and therefore, require a refund to USB or reduction of investor capital contributions, which are reported as deferred income in the Operating Partnership’s consolidated balance sheet, until such time as its obligation to deliver tax benefits is relieved. The remaining compliance periods for its tax credit arrangements runs through 2015. The Operating Partnership does not anticipate that any material refunds or reductions of investor capital contributions will be required in connection with these arrangements.

The Operating Partnership invests in properties and regularly incurs capital expenditures in the ordinary course of its business to maintain the properties. The Operating Partnership believes that such expenditures enhance its competitiveness. The Operating Partnership also enters into construction, utility and service contracts in the ordinary course of its business which may extend beyond one year. These contracts typically provide for cancellation with insignificant or no cancellation penalties.

Interest Rate Risk and Sensitivity Analysis

The analysis below presents the sensitivity of the market value of the Operating Partnership’s financial instruments to selected changes in market rates. The range of changes chosen reflects its view of changes which are reasonably possible over a one-year period. Market values are the present value of projected future cash flows based on the market rates chosen.

The Operating Partnership’s financial instruments consist of both fixed and variable rate debt. As of December 31, 2011 , its consolidated debt consisted of $512.4 million in fixed rate mortgages, no variable rate mortgages, $275.5 million in borrowings under its Credit Facility, $37.5 million borrowings in an unsecured term loan and $1,575.1 million in unsecured notes (before reduction of discounts) of which $1,549.3 million are fixed rate or variable swapped to fixed rate borrowings and $25.8 million are variable rate borrowings. All financial instruments were entered into for other than trading purposes and the net market value of these financial instruments is referred to as the net financial position. Changes in interest rates have different impacts on the fixed and variable rate portions of our debt portfolio. A change in interest rates on the fixed portion of the debt portfolio impacts the net financial instrument position, but has no impact on interest incurred or cash flows. A change in interest rates on the variable portion of the debt portfolio impacts the interest incurred and cash flows, but does not impact the net financial instrument position.

As of December 31, 2011 based on prevailing interest rates and credit spreads, the fair value of the Operating Partnership’s unsecured notes was $1.6 billion. For sensitivity purposes, a 100 basis point change in the discount rate equates to a change in the

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total fair value of its debt, including the Notes, of approximately $14.9 million at December 31, 2011 .

From time to time or as the need arises, the Operating Partnership uses derivative instruments to manage interest rate risk exposures and not for speculative purposes. During December 2011, the Operating Partnership executed hedging transactions that fix the rates on the New Term Loans and on two of its existing unsecured senior notes. All hedges commenced on February 1, 2012 (see Note 9 for additional information).

The total carrying value of the Operating Partnership’s variable rate debt (including variable swapped to fixed) was approximately $391.6 million and $444.6 million at December 31, 2011 and December 31, 2010 , respectively. The total fair value of the Operating Partnership’s debt was approximately $380.8 million and $432.6 million at December 31, 2011 and December 31, 2010 , respectively. For sensitivity purposes, a 100 basis point change in the discount rate equates to a change in the total fair value of its debt of approximately $3.4 million at December 31, 2011 , and a 100 basis point change in the discount rate equates to a change in the total fair value of its debt of approximately $4.4 million at December 31, 2010 .

If market rates of interest were to increase by 1%, the fair value of the Operating Partnership’s outstanding fixed-rate mortgage debt would decrease by approximately $28.9 million. If market rates of interest were to decrease by 1%, the fair value of its outstanding fixed-rate mortgage debt would increase by approximately $31.8 million.

At December 31, 2011 , the Operating Partnership’s outstanding variable rate debt (including variable swapped to fixed) based on LIBOR totaled approximately $391.6 million . At December 31, 2011 , the interest rate on its variable rate debt was approximately 1.1% . If market interest rates on its variable rate debt change by 100 basis points, total interest expense would change by approximately $0.8 million for the year ended December 31, 2011 .

These amounts were determined solely by considering the impact of hypothetical interest rates on the Operating Partnership’s financial instruments. Due to the uncertainty of specific actions the Operating Partnership may undertake to minimize possible effects of market interest rate increases, this analysis assumes no changes in its applicable financial instruments or structure.

Funds from Operations (FFO)

Pursuant to the definition of FFO adopted by the Board of Governors of the National Association of Real Estate Investment Trusts (“NAREIT”), we calculate FFO by adjusting net income/(loss) attributable to common unit holders (computed in accordance with GAAP) for gains (or losses) from sales of properties, real estate related depreciation, amortization, impairment charges, investment write-downs, and after similar adjustments for unconsolidated real estate ventures. FFO is a non-GAAP financial measure. The Operating Partnership believes that the use of FFO combined with the required U.S. GAAP presentations, has been beneficial in improving the understanding of operating results of REITs among the investing public and making comparisons of REITs' operating results more meaningful. The Operating Partnership considers FFO to be a useful measure for reviewing comparative operating and financial performance because, by excluding gains or losses related to sales of previously depreciated operating real estate assets and real estate depreciation and amortization, FFO can help the investing public compare the operating performance of a company's real estate between periods or as compared to other companies. The Operating Partnership's computation of FFO may not be comparable to FFO reported by other REITs or real estate companies that do not define the term in accordance with the current NAREIT definition or that interpret the current NAREIT definition differently.

The Operating Partnership considers net income, as defined by U.S. GAAP, to be the most comparable earnings measure to FFO. While FFO and FFO per unit are relevant and widely used measures of operating performance of REITs, FFO does not represent cash flow from operations or net income as defined by U.S. GAAP and should not be considered as alternatives to those measures in evaluating the company's liquidity or operating performance. The Operating Partnership believes that to further understand our performance, FFO should be compared with its reported net income/(loss) attributable to common unit holders and considered in addition to cash flows in accordance with GAAP, as presented in our Consolidated Financial Statements.

The following table presents a reconciliation of net income attributable to common unit holders to FFO for the years ended December 31, 2011 and 2010:

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	Year-ended — December 31, 2011		Year-ended — December 31, 2010
	(amounts in thousands)
Net loss attributable to common unitholders	$ (13,212	)	$ (26,110	)
Add (deduct):
Amount allocated to unvested restricted unitholders	505		512
Net gain on sale of interests in real estate	(2,791	)	—
Net gain on sale of undepreciated real estate	(45	)	—
Loss on real estate venture formation	222		—
Net (gain) loss on disposition of discontinued operations	(7,264	)	(11,011	)
Depreciation and amortization:
Real property - continuing operations	167,347		158,494
Leasing costs including acquired intangibles - continuing operations	49,286		50,889
Real property - discontinued operations	1,214		3,468
Leasing costs including acquired intangibles - discontinued operations	217		717
Company's share of unconsolidated real estate ventures	9,181		10,038
Funds from operations	$ 204,660		$ 186,997
Funds from operations allocable to unvested restricted shareholders	(1,264	)	(1,200	)
Funds from operations available to common share and unit holders (FFO)	$ 203,396		$ 185,797
Weighted-average shares/units outstanding - fully diluted	146,299,625		136,909,622

Item 7A. Quantitative and Qualitative Disclosure About Market Risk

See discussion in Management’s Discussion and Analysis of Financial Condition and Results of Operations included in Item 7 herein.

ITEM 8. Financial Statements and Supplementary Data

The financial statements and supplementary financial data of the Parent Company and the Operating Partnership, L.P. and the reports thereon of PricewaterhouseCoopers LLP, an independent registered public accounting firm, with respect thereto are listed under Item 15(a) and filed as part of this Annual Report on Form 10-K. See Item 15.

ITEM 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None

Item 9A. Controls and Procedures

Controls and Procedures (Parent Company)

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

Under the supervision and with the participation of the Parent Company’s management, including its principal executive officer and principal financial officer, the Parent Company’s management conducted an evaluation of its disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Based on this evaluation, the principal executive officer and the principal financial officer of the Parent Company concluded that the Parent Company’s disclosure controls and procedures were effective as of the end of the period covered by this annual report.

Management’s Report on Internal Control Over Financial Reporting

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The management of the Parent Company is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f).

Under the supervision and with the participation of the Parent Company’s management, including its principal executive officer and principal financial officer, the Parent Company’s management conducted an evaluation of the effectiveness of the its internal control over financial reporting based on the framework in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation under the framework in Internal Control — Integrated Framework , the Parent Company’s management concluded that the its internal control over financial reporting was effective as of December 31, 2011 .

The effectiveness of the Parent Company’s internal control over financial reporting as of December 31, 2011 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their reports which are included herein.

Changes in Internal Control over Financial Reporting

There have not been any changes in the Parent Company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the fourth fiscal quarter to which this report relates that have materially affected, or are reasonably likely to materially affect, the Parent Company’s internal control over financial reporting.

Controls and Procedures (Operating Partnership)

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

Under the supervision and with the participation of the Operating Partnership’s management, including its principal executive officer and principal financial officer, the Operating Partnership’s management conducted an evaluation of its disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Exchange Act. Based on this evaluation, the principal executive officer and the principal financial officer of Operating Partnership concluded that the Operating Partnership’s disclosure controls and procedures were effective as of the end of the period covered by this annual report.

Management’s Report on Internal Control Over Financial Reporting

The management of the Operating Partnership is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f).

Under the supervision and with the participation of the Operating Partnership’s management, including its principal executive officer and principal financial officer, the Operating Partnership’s management conducted an evaluation of the effectiveness its internal control over financial reporting based on the framework in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation under the framework in Internal Control — Integrated Framework , the Operating Partnership’s management concluded that the its internal control over financial reporting was effective as of December 31, 2011 .

The effectiveness of the Operating Partnership’s internal control over financial reporting as of December 31, 2011 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their reports which are included herein.

Changes in Internal Control over Financial Reporting.

There have not been any changes in the Operating Partnership’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the fourth fiscal quarter to which this report relates that have materially affected, or are reasonably likely to materially affect, the Operating Partnership’s internal control over financial reporting.

Item 9B. Other Information

None.

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PART III

ITEM 10. Directors, Executive Officers and Corporate Governance

Incorporated herein by reference to the Company’s definitive proxy statement to be filed with respect to its 2012 Annual Meeting of Shareholders.

ITEM 11. Executive Compensation

Incorporated herein by reference to the Company’s definitive proxy statement to be filed with respect to its 2012 Annual Meeting of Shareholders.

ITEM 12. Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters

Incorporated herein by reference to the Company’s definitive proxy statement to be filed with respect to its 2012 Annual Meeting of Shareholders.

ITEM 13. Certain Relationships and Related Transactions, and Director Independence

Incorporated herein by reference to the Company’s definitive proxy statement to be filed with respect to its 2012 Annual Meeting of Shareholders.

ITEM 14. Principal Accountant Fees and Services

Incorporated herein by reference to the Company’s definitive proxy statement to be filed with respect to its 2012 Annual Meeting of Shareholders.

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PART IV

ITEM 15. Exhibits and Financial Statement Schedules.

(a) 1. and 2. Financial Statements and Schedules

The financial statements and schedules of the Parent Company and the Operating Partnership listed below are filed as part of this annual report on the pages indicated.

Index to Financial Statements and Schedules

	Page
Report of Independent Registered Public Accounting Firm (Brandywine Realty Trust)	F - 1
Report of Independent Registered Public Accounting Firm (Brandywine Operating Partnership, L.P.)	F - 2
Financial Statements of Brandywine Realty Trust
Consolidated Balance Sheets as of December 31, 2011 and 2010	F - 3
Consolidated Statements of Operations for the Years Ended December 31, 2011, 2010 and 2009	F - 4
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2011, 2010 and 2009	F - 5
Consolidated Statements of Beneficiaries’ Equity for the Years Ended December 31, 2011, 2010 and 2009	F - 6
Consolidated Statements of Cash Flows for the Years Ended December 31, 2011, 2010 and 2009	F - 9
Financial Statements of Brandywine Operating Partnership, L.P.
Consolidated Balance Sheets as of December 31, 2011 and 2010	F - 11
Consolidated Statements of Operations for the Years Ended December 31, 2011, 2010 and 2009	F - 12
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2011, 2010 and 2009	F - 13
Consolidated Statements of Partners’ Equity for the Years Ended December 31, 2011, 2010 and 2009	F - 14
Consolidated Statements of Cash Flows for the Years Ended December 31, 2011, 2010 and 2009	F - 16
Notes to Consolidated Financial Statements (Brandywine Realty Trust and Brandywine Operating Partnership, L.P.)	F - 18
Schedule II — Valuation and Qualifying Accounts (Brandywine Realty Trust and Brandywine Operating Partnership, L.P.)	F - 59
Schedule III — Real Estate and Accumulated Depreciation (Brandywine Realty Trust and Brandywine Operating Partnership, L.P.)	F - 60

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3. Exhibits

Exhibits No.	Description
3.1.1	Amended and Restated Declaration of Trust of Brandywine Realty Trust (amended and restated as of May 12, 1997) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated June 9, 1997 and incorporated herein by reference)
3.1.2	Articles of Amendment to Declaration of Trust of Brandywine Realty Trust (September 4, 1997) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated September 10, 1997 and incorporated herein by reference)
3.1.3	Articles of Amendment to Declaration of Trust of Brandywine Realty Trust (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated June 3, 1998 and incorporated herein by reference)
3.1.4	Articles Supplementary to Declaration of Trust of Brandywine Realty Trust (September 28, 1998) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 13, 1998 and incorporated herein by reference)
3.1.5	Articles of Amendment to Declaration of Trust of Brandywine Realty Trust (March 19, 1999) (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 1998 and incorporated herein by reference)
3.1.6	Articles Supplementary to Declaration of Trust of Brandywine Realty Trust (April 19, 1999) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 26, 1999 and incorporated herein by reference)
3.1.7	Articles Supplementary to Declaration of Trust of Brandywine Realty Trust (December 30, 2003) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-A dated December 29, 2003 and incorporated herein by reference)
3.1.8	Articles Supplementary to Declaration of Trust of Brandywine Realty Trust (February 5, 2004) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-A dated February 5, 2004 and incorporated herein by reference)
3.1.9	Articles of Amendment to Declaration of Trust of Brandywine Realty Trust (October 3, 2005) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 4, 2005 and incorporated herein by reference)
3.1.10	Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (the “Operating Partnership”) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated December 17, 1997 and incorporated herein by reference)
3.1.11	First Amendment to Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated December 17, 1997 and incorporated herein by reference)
3.1.12	Second Amendment to the Amended and Restated Agreement of Limited Partnership Agreement of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 13, 1998 and incorporated herein by reference)
3.1.13	Third Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated May 14, 1998 and incorporated herein by reference)

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3.1.14	Fourth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 13, 1998 and incorporated herein by reference)
3.1.15	Fifth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 13, 1998 and incorporated herein by reference)
3.1.16	Sixth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 13, 1998 and incorporated herein by reference)
3.1.17	Seventh Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2003 and incorporated herein by reference)
3.1.18	Eighth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2003 and incorporated herein by reference)
3.1.19	Ninth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2003 and incorporated herein by reference)
3.1.20	Tenth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2003 and incorporated herein by reference)
3.1.21	Eleventh Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2003 and incorporated herein by reference)
3.1.22	Twelfth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2003 and incorporated herein by reference)
3.1.23	Thirteenth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated September 21, 2004 and incorporated herein by reference)
3.1.24	Fourteenth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated January 10, 2006 and incorporated herein by reference)
3.1.25	Fifteenth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated August 18, 2006 and incorporated herein by reference)
3.1.26	Sixteenth Amendment to the Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated August 9, 2010 and incorporated herein by reference)
3.1.27	List of partners of Brandywine Operating Partnership, L.P.

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3.2	Amended and Restated Bylaws of Brandywine Realty Trust (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated June 4, 2010 and incorporated herein by reference)
4.1	Form of 7.50% Series C Cumulative Redeemable Preferred Share Certificate (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-A dated December 29, 2003 and incorporated herein by reference)
4.2	Form of 7.375% Series D Cumulative Redeemable Preferred Share Certificate (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-A dated February 5, 2004 and incorporated herein by reference)
4.3.1	Indenture dated October 22, 2004 by and among Brandywine Operating Partnership, L.P., Brandywine Realty Trust, certain subsidiaries of Brandywine Operating Partnership, L.P. named therein and The Bank of New York Mellon, as Trustee (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated October 22, 2004 and incorporated herein by reference)
4.3.2	First Supplemental Indenture dated as of May 25, 2005 by and among Brandywine Operating Partnership, L.P., Brandywine Realty Trust, certain subsidiaries of Brandywine Operating Partnership, L.P. named therein and The Bank of New York Mellon, as Trustee (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated May 26, 2005 and incorporated herein by reference)
4.3.3	Second Supplemental Indenture dated as of October 4, 2006 by and among Brandywine Operating Partnership, L.P., Brandywine Realty Trust and The Bank of New York Mellon, as Trustee (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated October 4, 2006 and incorporated herein by reference)
4.3.4	Third Supplemental Indenture dated as of April 5, 2011 by and among Brandywine Operating Partnership, L.P., Brandywine Realty Trust and The Bank of New York Mellon, as Trustee (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated April 5, 2011 and incorporated herein by reference)
4.4	Form of $250,000,000 5.40% Guaranteed Note due 2014 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 22, 2004 and incorporated herein by reference)
4.5	Form of $300,000,000 aggregate principal amount of 5.75% Guaranteed Note due 2012 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated March 28, 2006 and incorporated herein by reference)
4.6	Form of $250,000,000 aggregate principal amount of 6.00% Guaranteed Note due 2016 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated March 28, 2006 and incorporated herein by reference)
4.7	Form of 3.875% Exchangeable Guaranteed Notes due 2026 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 4, 2006 and incorporated herein by reference)
4.8	Form of $300,000,000 aggregate principal amount of 5.70% Guaranteed Notes due 2017 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 30, 2007 and incorporated herein by reference)
4.9	Form of $250,000,000 aggregate principal amount of 7.50% Guaranteed Notes due 2015 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated September 25, 2009 and incorporated herein by reference)
4.10	Form of $325,000,000 aggregate principal amount of 4.95% Guaranteed Notes due 2018 (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated April 5, 2011 and incorporated herein by reference)
10.1	Second Amended and Restated Revolving Credit Agreement dated as of June 29, 2007 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated June 29, 2007 and incorporated herein by reference)

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10.2	Term Loan Agreement dated as of October 15, 2007 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 16, 2007 and incorporated herein by reference)
10.3	First Amendment to the Second Amended and Restated Revolving Credit Agreement dated as of February 28, 2011 (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated March 1, 2011 and incorporated herein by reference)
10.4	Third Amended and Restated Revolving Credit Agreement dated as of December 15, 2011
10.5	Term Loan A Agreement dated as of December 15, 2011
10.6	Term Loan B Agreement dated as of December 15, 2011
10.7	Term Loan C Agreement dated as of December 15, 2011
10.8	Contribution Agreement dated as of July 10, 1998 (with Donald E. Axinn) (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K dated July 30, 1998 and incorporated herein by reference)
10.9	First Amendment to Contribution Agreement (with Donald E. Axinn) (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 13, 1998 and incorporated herein by reference)
10.10	Modification Agreement dated as of June 20, 2005 between Brandywine Operating Partnership, L.P. and Donald E. Axinn (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated June 21, 2005 and incorporated herein by reference)
10.11	Contribution Agreement dated August 18, 2004 with TRC Realty, Inc.-GP, TRC-LB LLC and TRC Associates Limited Partnership (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated August 19, 2004 and incorporated herein by reference)
10.12	Registration Rights Agreement (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated September 21, 2004 and incorporated herein by reference)
10.13	Tax Protection Agreement (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated September 21, 2004 and incorporated herein by reference)
10.14	Registration Rights Agreement dated as of October 3, 2005 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 4, 2005 and incorporated herein by reference)
10.15	Letter to Cohen & Steers Capital Management, Inc. relating to waiver of share ownership limit (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-Q for the quarter ended June 30, 2003 and incorporated herein by reference)
10.16	Registration Rights Agreement dated as of October 4, 2006 relating to 3.875% Exchangeable Guaranteed Notes due 2026 (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 4, 2006 and incorporated herein by reference)
10.17	Common Share Delivery Agreement (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated October 4, 2006 and incorporated herein by reference)

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10.18	Sales Agency Financing Agreement dated as of March 10, 2010 with BNY Mellon Capital Markets, LLC (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated March 10, 2010 and incorporated herein by reference)
10.19	Sales Agency Financing Agreement dated as of March 10, 2010 with Citigroup Global Markets Inc. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated March 10, 2010 and incorporated herein by reference)
10.20	Sales Agency Financing Agreement dated as of March 10, 2010 with Deutsche Bank Securities Inc. (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated March 10, 2010 and incorporated herein by reference)
10.21	Registration Rights Agreement (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated August 9, 2010 and incorporated herein by reference)
10.22	Amended and Restated Employment Agreement dated as of February 9, 2007 of Gerard H. Sweeney** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated February 14, 2007 and incorporated herein by reference)
10.23	Amended and Restated 1997 Long-Term Incentive Plan (as amended effective June 2, 2010)** (previously filed as an exhibit to Brandywine Realty Trust’s Registration Statement on Form S-8, File No. 333-167266 and incorporated herein by reference)
10.24	Amended and Restated Executive Deferred Compensation Plan effective March 25, 2004** (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-Q for the quarter ended March 31, 2004 and incorporated herein by reference)
10.25	Amended and Restated Executive Deferred Compensation Plan effective January 1, 2009** (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2008 and incorporated herein by reference)
10.26	2007 Non-Qualified Employee Share Purchase Plan** (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-Q for the quarter ended March 31, 2007 and incorporated herein by reference)
10.27	Performance Share Award to Howard M. Sipzner** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated December 12, 2006 and incorporated herein by reference)
10.28	2007 Performance Share Award to Gerard H. Sweeney** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated February 14, 2007 and incorporated herein by reference)
10.29	Form of 2007 Performance Share Award to executive officers (other than the President and Chief Executive Officer)** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated February 14, 2007 and incorporated herein by reference)
10.30	Summary of Trustee Compensation** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated March 17, 2006 and incorporated herein by reference)
10.31	Form of Non-Qualified Share Option Agreement to the President and CEO and Executive Vice President and CFO** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 11, 2008 and incorporated herein by reference)
10.32	Form of Non-Qualified Share Option Agreement to the executive officers (other than the President and CEO and Executive Vice President and CFO)** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 11, 2008 and incorporated herein by reference)

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10.33	Form of Incentive Stock Option Agreement to the President and CEO and Executive Vice President and CFO ** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 11, 2008 and incorporated herein by reference)
10.34	Form of Incentive Stock Option Agreement to the executive officers (other than the President and CEO and Executive Vice President and CFO)** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 11, 2008 and incorporated herein by reference)
10.35	Form of Restricted Share Award for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 1, 2009 and incorporated herein by reference)
10.36	Form of Restricted Performance Share Unit and Dividend Equivalent Rights Award Agreement for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 1, 2009 and incorporated herein by reference)
10.37	2009-2011 Restricted Performance Share Unit Program** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 1, 2009 and incorporated herein by reference)
10.38	Forms of Non-Qualified Share Option Agreement for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 1, 2009 and incorporated herein by reference)
10.39	Forms of Incentive Stock Option Agreement for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated April 1, 2009 and incorporated herein by reference)
10.40	Form of Amended and Restated Change of Control Agreement with Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on February 4, 2010 and incorporated herein by reference)
10.41	Employment Agreement dated February 3, 2010 with Howard M. Sipzner** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on February 4, 2010 and incorporated herein by reference)
10.42	Form of Restricted Share Award (March 2010) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on March 8, 2010 and incorporated herein by reference)
10.43	Form of Restricted Performance Share Unit and Dividend Equivalent Rights Award Agreement (March 2010) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on March 8, 2010 and incorporated herein by reference)
10.44	Forms of Incentive Stock Option Agreement (March 2010) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on March 8, 2010 and incorporated herein by reference)
10.45	Forms of Non-Qualified Share Option Agreement (March 2010) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on March 8, 2010 and incorporated herein by reference)
10.46	2010-2012 Restricted Performance Share Unit Program** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K filed on March 8, 2010 and incorporated herein by reference)
10.47	Letter to RREEF America LLC relating to waiver of share ownership limit (previously filed as an exhibit to Brandywine Realty Trust’s Form 10-K for the fiscal year ended December 31, 2009 and incorporated herein by reference)

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10.48	Form of Restricted Share Award (March 2011) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K filed on March 8, 2011 and incorporated herein by reference)
10.49	Form of Restricted Performance Share Unit and Dividend Equivalent Rights Award Agreement (March 2011) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K filed on March 8, 2011 and incorporated herein by reference)
10.50	Forms of Incentive Share Option Agreement (March 2011) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K filed on March 8, 2011 and incorporated herein by reference)
10.51	Forms of Non-Qualified Share Option Agreement (March 2011) for Executive Officers** (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K filed on March 8, 2011 and incorporated herein by reference)
10.52	2011-2013 Restricted Performance Share Unit Program** (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K filed on March 8, 2011 and incorporated herein by reference)
10.53	Letter Agreement dated May 24, 2011 modifying options of President and Chief Executive Officer** (previously filed as an exhibit to Brandywine Realty Trust's Form 8-K filed on May 24, 2011 and incorporated herein by reference)
12.1	Statement re Computation of Ratios of Brandywine Realty Trust
12.2	Statement re Computation of Ratios of Brandywine Operating Partnership, L.P.
14.1	Code of Business Conduct and Ethics** (previously filed as an exhibit to Brandywine Realty Trust’s Form 8-K dated December 22, 2004 and incorporated herein by reference)
21	List of subsidiaries
23.1	Consent of PricewaterhouseCoopers LLP relating to financial statements of Brandywine Realty Trust
23.2	Consent of PricewaterhouseCoopers LLP relating to financial statements of Brandywine Operating Partnership, L.P.
31.1	Certification of the Chief Executive Officer of Brandywine Realty Trust pursuant to 13a-14 under the Securities Exchange Act of 1934
31.2	Certification of the Chief Financial Officer of Brandywine Realty Trust pursuant to 13a-14 under the Securities Exchange Act of 1934
31.3	Certification of the Chief Executive Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 13a-14 under the Securities Exchange Act of 1934
31.4	Certification of the Chief Financial Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 13a-14 under the Securities Exchange Act of 1934
32.1	Certification of the Chief Executive Officer of Brandywine Realty Trust pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

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32.2	Certification of the Chief Financial Officer of Brandywine Realty Trust pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.3	Certification of the Chief Executive Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.4	Certification of the Chief Financial Officer of Brandywine Realty Trust, in its capacity as the general partner of Brandywine Operating Partnership, L.P., pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
99.1	Material Tax Consequences

** Management contract or compensatory plan or arrangement

(b) Financial Statement Schedule: See Item 15 (a) (1) and (2) above

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

BRANDYWINE REALTY TRUST
By:	/s/ Gerard H. Sweeney
	Gerard H. Sweeney
	President and Chief Executive Officer

Date: February 24, 2012

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Walter D’Alessio	Chairman of the Board and Trustee	February 24, 2012
Walter D’Alessio
/s/ Gerard H. Sweeney	President, Chief Executive Officer and Trustee	February 24, 2012
Gerard H. Sweeney	(Principal Executive Officer)
/s/ Howard M. Sipzner	Executive Vice President and Chief Financial Officer	February 24, 2012
Howard M. Sipzner	(Principal Financial Officer)
/s/ Gabriel J. Mainardi	Vice President and Chief Accounting Officer (Principal	February 24, 2012
Gabriel J. Mainardi	Accounting Officer)
/s/ D. Pike Aloian	Trustee	February 24, 2012
D. Pike Aloian
/s/ Wyche Fowler	Trustee	February 24, 2012
Wyche Fowler
/s/ James Diggs	Trustee	February 24, 2012
James Diggs
/s/ Michael J. Joyce	Trustee	February 24, 2012
Michael J. Joyce
/s/ Anthony A. Nichols, Sr.	Trustee	February 24, 2012
Anthony A. Nichols, Sr.
/s/ Charles P. Pizzi	Trustee	February 24, 2012
Charles P. Pizzi

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SIGNATURES

BRANDYWINE OPERATING PARTNERSHIP, L.P.
By:	Brandywine Realty Trust, its General Partner
By:	/s/ Gerard H. Sweeney
	Gerard H. Sweeney
	President and Chief Executive Officer

Date: February 24, 2012

Signature	Title	Date
/s/ Walter D’Alessio	Chairman of the Board and Trustee	February 24, 2012
Walter D’Alessio
/s/ Gerard H. Sweeney	President, Chief Executive Officer and Trustee	February 24, 2012
Gerard H. Sweeney	(Principal Executive Officer)
/s/ Howard M. Sipzner	Executive Vice President and Chief Financial Officer	February 24, 2012
Howard M. Sipzner	(Principal Financial Officer)
/s/ Gabriel J. Mainardi	Vice President and Chief Accounting Officer (Principal	February 24, 2012
Gabriel J. Mainardi	Accounting Officer)
/s/ D. Pike Aloian	Trustee	February 24, 2012
D. Pike Aloian
/s/ Wyche Fowler	Trustee	February 24, 2012
Wyche Fowler
/s/ James Diggs	Trustee	February 24, 2012
James Diggs
/s/ Michael J. Joyce	Trustee	February 24, 2012
Michael J. Joyce
/s/ Anthony A. Nichols, Sr.	Trustee	February 24, 2012
Anthony A. Nichols, Sr.
/s/ Charles P. Pizzi	Trustee	February 24, 2012
Charles P. Pizzi

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Report of Independent Registered Public Accounting Firm

To the Board of Trustees and Shareholders of Brandywine Realty Trust:

In our opinion, the consolidated financial statements listed in the index appearing under Item 15(a) present fairly, in all material respects, the financial position of Brandywine Realty Trust and its subsidiaries (the “Company”) at December 31, 2011 and 2010, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2011 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedules listed in the index appearing under Item 15(a) present fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2011 , based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for these financial statements and financial statement schedules, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedules and on the Company’s internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Philadelphia, Pennsylvania

February 24, 2012

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Report of Independent Registered Public Accounting Firm

To the Partners of Brandywine Operating Partnership, L.P.:

In our opinion, the consolidated financial statements listed in the index appearing under Item 15(a) present fairly, in all material respects, the financial position of Brandywine Operating Partnership, L.P. and its subsidiaries (the “Partnership”) at December 31, 2011 and 2010 , and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2011 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedules listed in the index appearing under Item 15(a) present fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Partnership maintained, in all material respects, effective internal control over financial reporting as of December 31, 2011 , based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Partnership’s management is responsible for these financial statements and financial statement schedules, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Report on Internal Control over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedules and on the Partnership’s internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

/s/ PricewaterhouseCoopers LLP

Philadelphia, Pennsylvania

February 24, 2012

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BRANDYWINE REALTY TRUST

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share information)

	December 31, 2011		December 31, 2010
ASSETS
Real estate investments:
Rental properties	$ 4,793,080		$ 4,834,111
Accumulated depreciation	(865,710	)	(776,078	)
Operating real estate investments, net	3,927,370		4,058,033
Construction-in-progress	25,083		33,322
Land inventory	109,008		110,055
Total real estate investments, net	4,061,461		4,201,410
Cash and cash equivalents	410		16,565
Accounts receivable, net	14,718		16,009
Accrued rent receivable, net	108,101		95,541
Investment in real estate ventures, at equity	115,807		84,372
Deferred costs, net	115,362		106,117
Intangible assets, net	70,515		97,462
Notes receivable	18,186		18,205
Other assets	53,158		54,697
Total assets	$ 4,557,718		$ 4,690,378
LIABILITIES AND BENEFICIARIES’ EQUITY
Mortgage notes payable	$ 511,061		$ 711,789
Unsecured credit facility	275,500		183,000
Unsecured term loan	37,500		183,000
Unsecured senior notes, net of discounts	1,569,934		1,352,657
Accounts payable and accrued expenses	69,929		72,235
Distributions payable	23,895		22,623
Deferred income, gains and rent	99,569		121,552
Acquired lease intangibles, net	35,106		29,233
Other liabilities	45,528		36,515
Total liabilities	2,668,022		2,712,604
Commitments and contingencies (Note 20)
Brandywine Realty Trust’s equity:
Preferred Shares (shares authorized-20,000,000):
7.50% Series C Preferred Shares, $0.01 par value; issued and outstanding- 2,000,000 in 2011 and 2010, respectively	20		20
7.375% Series D Preferred Shares, $0.01 par value; issued and outstanding- 2,300,000 in 2011 and 2010, respectively	23		23
Common Shares of Brandywine Realty Trust’s beneficial interest, $0.01 par value; shares authorized 200,000,000; 142,690,755 and 134,601,796 issued in 2011 and 2010, respectively and 142,690,755 and 134,485,117 outstanding in 2011 and 2010, respectively	1,424		1,343
Additional paid-in capital	2,776,197		2,671,217
Deferred compensation payable in common stock	5,631		5,774
Common shares in treasury, at cost, 116,679 in 2010	—		(3,074	)
Common shares in grantor trust, 292,646 in 2011 and 291,281 in 2010	(5,631	)	(5,774	)
Cumulative earnings	477,338		483,439
Accumulated other comprehensive loss	(6,079	)	(1,945	)
Cumulative distributions	(1,392,332	)	(1,301,521	)
Total Brandywine Realty Trust’s equity	1,856,591		1,849,502
Non-controlling interests	33,105		128,272
Total equity	1,889,696		1,977,774
Total liabilities and equity	$ 4,557,718		$ 4,690,378

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except share and per share information)

	Years ended December 31, — 2011		2010		2009
Revenue:
Rents	$ 480,600		$ 461,101		$ 467,188
Tenant reimbursements	81,236		77,139		76,652
Termination fees	2,993		5,576		3,601
Third party management fees, labor reimbursement and leasing	11,536		11,830		17,151
Other	5,440		4,310		3,328
Total revenue	581,805		559,956		567,920
Operating Expenses:
Property operating expenses	171,991		167,911		162,940
Real estate taxes	56,230		53,564		56,224
Third party management expenses	5,590		5,866		7,996
Depreciation and amortization	217,680		210,592		203,572
General and administrative expenses	24,602		23,306		20,821
Total operating expenses	476,093		461,239		451,553
Operating income	105,712		98,717		116,367
Other Income (Expense):
Interest income	1,813		3,222		2,499
Historic tax credit transaction income	12,026		—		—
Interest expense	(131,405	)	(132,640	)	(135,740	)
Interest expense — amortization of deferred financing costs	(4,991	)	(3,770	)	(5,864	)
Recognized hedge activity	—		—		(916	)
Equity in income of real estate ventures	3,775		5,305		4,069
Net gain on sale of interests in real estate	2,791		—		(3	)
Net gain on sale of undepreciated real estate	45		—		—
Loss on real estate venture formation	(222	)	—		—
(Loss) gain on early extinguishment of debt	(2,776	)	(2,110	)	23,176
Income (loss) from continuing operations	(13,232	)	(31,276	)	3,588
Discontinued operations:
Income from discontinued operations	1,253		2,659		6,960
Net gain on disposition of discontinued operations	7,264		11,011		1,241
Provision for impairment	—		—		(3,700	)
Total discontinued operations	8,517		13,670		4,501
Net income (loss)	(4,715	)	(17,606	)	8,089
Net (income) loss from discontinued operations attributable to non- controlling interests — LP units	(332	)	(288	)	(91	)
Net income attributable to non-controlling interests — partners’ share of consolidated real estate ventures	—		—		(30	)
Net (income) loss from continuing operations attributable to non-controlling interests — LP units	548		820		58
Net (income) loss attributable to non-controlling interests	216		532		(63	)
Net income (loss) attributable to Brandywine Realty Trust	(4,499	)	(17,074	)	8,026
Distribution to Preferred Shares	(7,992	)	(7,992	)	(7,992	)
Amount allocated to unvested restricted shareholders	(505	)	(512	)	(279	)
Net loss attributable to Common Shareholders of Brandywine Realty Trust	$ (12,996	)	$ (25,578	)	$ (245	)
Basic earnings (loss) per Common Share:
Continuing operations	$ (0.16	)	$ (0.29	)	$ (0.04	)
Discontinued operations	0.06		0.10		0.04
	$ (0.10	)	$ (0.19	)	$ —
Diluted earnings (loss) per Common Share:
Continuing operations	$ (0.16	)	(0.29	)	$ (0.04	)
Discontinued operations	0.06		0.10		0.04
	$ (0.10	)	$ (0.19	)	$ —
Basic weighted average shares outstanding	135,444,424		131,743,275		111,898,045
Diluted weighted average shares outstanding	135,444,424		131,743,275		113,251,291
Net income (loss) attributable to Brandywine Realty Trust
Income (loss) from continuing operations	$ (12,684	)	$ (30,456	)	$ 3,616
Income (loss) from discontinued operations	8,185		13,382		4,410
Net income (loss)	$ (4,499	)	$ (17,074	)	$ 8,026

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	Years ended December 31, — 2011		2010		2009
Net income (loss)	$ (4,715	)	$ (17,606	)	$ 8,089
Comprehensive income:
Unrealized gain (loss) on derivative financial instruments	(4,499	)	7,320		7,395
Ineffectiveness of the hedges	—		—		(125	)
Reclassification of realized (gains)/losses on derivative financial instruments to operations, net	153		28		(184	)
Total comprehensive income (loss)	(4,346	)	7,348		7,086
Comprehensive income (loss)	(9,061	)	(10,258	)	15,175
Comprehensive (income) loss attributable to non-controlling interest	427		377		(63	)
Comprehensive income (loss) attributable to Brandywine Realty Trust	$ (8,634	)	$ (9,881	)	$ 15,112

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF BENEFICIARIES’ EQUITY

For the Years Ended December 31, 2011 , 2010 and 2009

(in thousands, except number of shares)

BALANCE, December 31, 2008	Number of Preferred Shares — 4,300,000	Par Value of Preferred Shares — $ 43	Number of Common Shares — 88,610,053		Number of Treasury Shares — 451,116		Number of Rabbi Trust/Deferred Compensation Shares — 215,742	Common Shares of Brandywine Realty Trust’s beneficial interest — $ 882		Additional Paid-in Capital — $ 2,351,428		Common Shares in Treasury — $ (14,121	)	Deferred Compensation Payable in Common Stock — $ 6,274		Common Shares in Grantor Trust — $ (6,274	)	Cumulative Earnings — $ 498,716	$ (17,005	)	Cumulative Distributions — $ (1,150,406	)	Non-Controlling Interests — $ 52,961		Total — $ 1,722,498
Net income																		8,026					63		8,089
Comprehensive income																			7,376				(290	)	7,086
Issuance of Common Shares of Beneficial Interest			40,250					403		241,920															242,323
Bonus Share Issuance					(36,826	)						1,228						(1,105	)						123
Vesting of Restricted Stock					(86,172	)	8,971	2		(852	)	2,960		56		(56	)	(2,322	)						(212	)
Restricted Stock Amortization										3,286															3,286
Restricted Performance Units Amortization										288															288
Conversion of LP units to Common Shares					(7,513	)						432						(178	)				(254	)	—
Share Issuance from/to Deferred Compensation Plan			(3,796	)	(54,854	)	26,092			(29	)	1,830		(816	)	816		(1,670	)						131
Share Choice Plan Issuance			(7,081	)				(1	)	(45	)														(46	)
Stock Option Amortization										602															602
Outperformance Plan Amortization										927															927
Trustee Fees Paid in Shares					(13,987	)	4,895					466		35		(35	)	(314	)						152
Other — consolidated real estate ventures																							34		34
Other activity										187									491						678
Adjustment for Non-controlling Interest										12,709								231					(12,940	)	—
Preferred Share distributions																					(7,992	)			(7,992	)
Distributions declared ($0.45 per share)																					(54,961	)	(1,266	)	(56,227	)
BALANCE, December 31, 2009	4,300,000	$ 43	128,849,176		251,764		255,700	$ 1,286		$ 2,610,421		$ (7,205	)	$ 5,549		$ (5,549	)	$ 501,384	$ (9,138	)	$ (1,213,359	)	$ 38,308		$ 1,921,740
Net loss																		(17,074	)				(532	)	(17,606	)

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Comprehensive income																					155		7,348
Issuance of Common Shares of Beneficial Interest			5,742,268				57	71,924															71,981
Equity issuance costs								(1,214	)														(1,214	)
Issuance of LP Units																					77,732		77,732
Bonus Share Issuance				(32,607	)	32,607				871		369		(369	)	(502	)						369
Vesting of Restricted Stock				(76,598	)	8,989		(1,114	)	2,304		103		(103	)	(1,417	)						(227	)
Restricted Stock Amortization								3,483															3,483
Restricted Performance Units Amortization								965															965
Conversion of LP Units to Common Shares				(17,468	)					732						(266	)				(466	)	—
Share Issuance from/to Deferred Compensation Plan			(2,409	)		(9,035	)					(282	)	282									—
Stock Option Amortization								1,131															1,131
Outperformance Plan Amortization								380															380
Trustee Fees Paid in Shares				(8,412	)	3,020				224		35		(35	)	(125	)						99
Exercise of Options			12,761					37															37
Adjustment for Non-controlling Interest								(14,796	)												14,796		—
Cumulative Effect of Accounting Change for Variable Interest Entities																1,439					(38	)	1,401
Preferred Share distributions																			(7,992	)			(7,992	)
Distributions declared ($0.60 per share)																			(80,170	)	(1,683	)	(81,853	)
BALANCE, December 31, 2010	4,300,000	$ 43	134,601,796	116,679		291,281	$ 1,343	$ 2,671,217		$ (3,074	)	$ 5,774		$ (5,774	)	$ 483,439	$ (1,945	)	$ (1,301,521	)	$ 128,272		$ 1,977,774
Net loss																(4,500	)				(215	)	(4,715	)
Comprehensive income																	(4,134	)			(212	)	(4,346	)
Issuance of Common Shares of Beneficial Interest			679,285				7	8,265															8,272
Equity issuance costs								(345	)												(32	)	(377	)
Conversion of LP Units to Common Shares			7,204,104				72	85,966													(86,038	)	—
Bonus Share Issuance				(463	)	463				12		6		(6	)	(6	)						6

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Vesting of Restricted Stock			85,248		9,043		(1,818	)					(1,595							(350	)
Restricted Stock Amortization							2,937													2,937
Restricted Performance Units Amortization							1,679													1,679
Exercise of Stock Options			120,179			1	349													350
Stock Option Amortization							1,487													1,487
Outperformance Plan Amortization							123													123
Share Issuance from/to Deferred Compensation Plan			(845	)	(8,141	)	(16	)	(149	)	149									(16	)
Share Choice Plan Issuance			(1,684	)			(55	)												(55	)
Trustee Fees Paid in Shares			2,672				32													32
Adjustment to Non-controlling Interest							6,376											(6,376	)	—
Preferred Share distributions																(7,992	)			(7,992	)
Distributions declared ($0.60 per share)																(82,819	)	(2,294	)	(85,113	)
BALANCE, December 31, 2011	4,300,000	$ 43	142,690,755	—	292,646	$ 1,424	$ 2,776,197	$ —	$ 5,631		$ (5,631	)	$ 477,338	$ (6,079	)	$ (1,392,332	)	$ 33,105		$ 1,889,696

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE REALTY TRUST

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Years ended December 31, — 2011		2010		2009
Cash flows from operating activities:
Net income (loss)	$ (4,715	)	$ (17,606	)	$ 8,089
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	219,110		214,776		210,463
Amortization of deferred financing costs	4,991		3,770		5,864
Amortization of debt discount/(premium), net	1,567		831		3,495
Straight-line rent income	(20,298	)	(13,705	)	(9,116	)
Amortization of acquired above (below) market leases to rental revenue, net	(5,384	)	(5,960	)	(6,661	)
Straight-line ground rent expense	1,924		1,647		1,473
Provision for doubtful accounts	1,924		2,479		5,371
Non-cash compensation expense	4,270		4,814		5,200
Recognized hedge activity	—		—		916
Provision for impairment on discontinued operations	—		—		3,700
Real estate venture income in excess of cumulative distributions	(1,175	)	(4,648	)	(2,512	)
Loss on real estate venture formation	222		—		—
Net loss (gain) on sale of interests in real estate	(10,008	)	(11,011	)	(1,237	)
Loss (gain) on early extinguishment of debt	2,776		2,110		(23,176	)
Cumulative interest accretion of repayments of unsecured notes	(4,005	)	(3,433	)	(5,009	)
Contributions from historic tax credit transaction, net of deferred costs	2,694		27,396		23,763
Historic tax credit transaction income	(12,026	)	—		—
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(856	)	(4,173	)	3,746
Other assets	(2,083	)	(2,782	)	2,373
Accounts payable and accrued expenses	7,732		(7,980	)	(4,081	)
Deferred income, gains and rents	(7,220	)	(6,412	)	3,059
Other liabilities	(425	)	5,014		(5,315	)
Net cash from operating activities	179,015		185,127		220,405
Cash flows from investing activities:
Acquisition of properties	(40,674	)	(50,681	)	—
Sales of properties, net	155,956		50,089		101,305
Proceeds from repayment of mortgage notes receivable	—		40,000		—
Capital expenditures	(131,156	)	(180,943	)	(211,892	)
Advances for purchase of tenant assets, net of repayments	1,365		(1,715	)	—
Loan provided to an unconsolidated Real Estate Venture partner	—		(826	)	—
Investment in unconsolidated Real Estate Ventures	(5,277	)	(5,180	)	(14,980	)
Escrowed cash	—		—		31,385
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	10,316		2,205		13,062
Decrease in cash due to the deconsolidation of variable interest entities	—		(1,382	)	—
Leasing costs	(38,461	)	(23,503	)	(21,429	)
Net cash used in investing activities	(47,931	)	(171,936	)	(102,549	)
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	706,002		565,000		983,000

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Repayments of Credit Facility borrowings	(613,502	)	(474,000	)	(1,044,000	)
Proceeds from mortgage notes payable	—		256,104		149,800
Repayments of mortgage notes payable	(221,856	)	(51,966	)	(84,102	)
Repayments of unsecured term loan	(145,500	)	—		—
Proceeds from unsecured notes	321,448		—		247,030
Repayments of unsecured notes	(105,381	)	(276,270	)	(514,004	)
Proceeds from financing activity	—		—		—
Net settlement of hedge transactions	(613	)	—		(5,044	)
Debt financing costs	(4,249	)	(595	)	(24,620	)
Refund of deferred financing costs related to forward commitment	—		1,659		—
Net proceeds from issuance of shares	7,930		70,867		242,332
Exercise of stock options	350		37		—
Distributions paid to shareholders	(89,559	)	(87,345	)	(68,914	)
Distributions to noncontrolling interest	(2,309	)	(1,684	)	(1,691	)
Net cash from (used in) financing activities	(147,239	)	1,807		(120,213	)
Increase (decrease) in cash and cash equivalents	(16,155	)	14,998		(2,357	)
Cash and cash equivalents at beginning of year	16,565		1,567		3,924
Cash and cash equivalents at end of year	$ 410		$ 16,565		$ 1,567
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the years ended December 31, 2011, 2010 and 2009 of $1,997, $10,385, and $8,893, respectively	$ 135,210		$ 135,206		$ 139,636
Supplemental disclosure of non-cash activity:
Note receivable issued related to the sale of the two Trenton properties, net of $12.9 million deferred gain	—		—		9,600
Settlement of note receivable through foreclosure of a parcel of land	—		(2,795	)	—
Proceeds from mortgage notes payable retained by lender and included in other assets (see Note 7)	—		396		—
Change in capital expenditures financed through accounts payable at period end	(3,896	)	(5,126	)	7,086
Change in capital expenditures financed through retention payable at period end	(6,213	)	(2,066	)	5,862
Change in unfunded tenant allowance	(1,717	)	—		5,986
Change in real estate investments due to the deconsolidation of variable interest entities	—		(37,126	)	—
Change in mortgage notes payable due to the deconsolidation of variable interest entities	—		(42,877	)	—
Change in non-controlling interest from issuance of limited partnership units (see Note 3)	—		77,733		—

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED BALANCE SHEETS

(in thousands, except unit and per unit information)

	December 31, 2011		December 31, 2010
ASSETS
Real estate investments:
Operating properties	$ 4,793,080		$ 4,834,111
Accumulated depreciation	(865,710	)	(776,078	)
Operating real estate investments, net	3,927,370		4,058,033
Construction-in-progress	25,083		33,322
Land inventory	109,008		110,055
Total real estate investments, net	4,061,461		4,201,410
Cash and cash equivalents	410		16,565
Accounts receivable, net	14,718		16,009
Accrued rent receivable, net	108,101		95,541
Investment in real estate ventures, at equity	115,807		84,372
Deferred costs, net	115,362		106,117
Intangible assets, net	70,515		97,462
Notes receivable	18,186		18,205
Other assets	53,158		54,697
Total assets	$ 4,557,718		$ 4,690,378
LIABILITIES AND EQUITY
Mortgage notes payable	$ 511,061		$ 711,789
Unsecured credit facility	275,500		183,000
Unsecured term loan	37,500		183,000
Unsecured senior notes, net of discounts	1,569,934		1,352,657
Accounts payable and accrued expenses	69,929		72,235
Distributions payable	23,895		22,623
Deferred income, gains and rent	99,569		121,552
Acquired lease intangibles, net	35,106		29,233
Other liabilities	45,528		36,515
Total liabilities	2,668,022		2,712,604
Commitments and contingencies (Note 20)
Redeemable limited partnership units at redemption value; 2,698,648 and 9,902,752 issued and outstanding in 2011 and 2010, respectively	38,370		132,855
Brandywine Operating Partnership’s equity:
7.50% Series D Preferred Mirror Units; issued and outstanding- 2,000,000 in 2011 and 2010, respectively	47,912		47,912
7.375% Series E Preferred Mirror Units; issued and outstanding- 2,300,000 in 2011 and 2010, respectively	55,538		55,538
General Partnership Capital, 142,690,755 and 134,601,796 units issued in 2011 and 2010, respectively and 142,690,755 and 134,485,117 units outstanding in 2011 and 2010, respectively	1,754,302		1,743,549
Accumulated other comprehensive loss	(6,426	)	(2,080	)
Total Brandywine Operating Partnership’s equity	1,851,326		1,844,919
Total liabilities and partners’ equity	$ 4,557,718		$ 4,690,378

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except unit and per unit information)

	For the year ended December 31, — 2011		2010		2009
Revenue:
Rents	$ 480,600		$ 461,101		$ 467,188
Tenant reimbursements	81,236		77,139		76,652
Termination fees	2,993		5,576		3,601
Third party management fees, labor reimbursement and leasing	11,536		11,830		17,151
Other	5,440		4,310		3,328
Total revenue	581,805		559,956		567,920
Operating Expenses:
Property operating expenses	171,991		167,911		162,940
Real estate taxes	56,230		53,564		56,224
Third party management expenses	5,590		5,866		7,996
Depreciation and amortization	217,680		210,592		203,572
General & administrative expenses	24,602		23,306		20,821
Total operating expenses	476,093		461,239		451,553
Operating income	105,712		98,717		116,367
Other Income (Expense):
Interest income	1,813		3,222		2,499
Historic Tax Credit Transaction Income	12,026		—		—
Interest expense	(131,405	)	(132,640	)	(135,740	)
Interest expense — Amortization of deferred financing costs	(4,991	)	(3,770	)	(5,864	)
Recognized hedge activity	—		—		(916	)
Equity in income of real estate ventures	3,775		5,305		4,069
Net gain on sale of interests in real estate	2,791		—		(3	)
Net gain on sale of undepreciated real estate	45		—		—
Loss on real estate venture formation	(222	)	—		—
(Loss) Gain on early extinguishment of debt	(2,776	)	(2,110	)	23,176
Income (loss) from continuing operations	(13,232	)	(31,276	)	3,588
Discontinued operations:
Income from discontinued operations	1,253		2,659		6,960
Net (loss) gain on disposition of discontinued operations	7,264		11,011		1,241
Provision for impairment	—		—		(3,700	)
	8,517		13,670		4,501
Net income (loss)	(4,715	)	(17,606	)	8,089
Net income attributable to non-controlling interests	—		—		(30	)
Net income (loss) attributable to Brandywine Operating Partnership	(4,715	)	(17,606	)	8,059
Distribution to Preferred share dividends	(7,992	)	(7,992	)	(7,992	)
Amount allocated to unvested restricted unitholders	(505	)	(512	)	(279	)
Net loss attributable to Common Partnership Unitholders Brandywine Operating Partnership	$ (13,212	)	$ (26,110	)	$ (212	)
Basic earnings (loss) per Common Partnership Unit:
Continuing operations	$ (0.15	)	$ (0.29	)	$ (0.04	)
Discontinued operations	0.06		0.10		0.04
	$ (0.09	)	$ (0.19	)	$ —
Diluted earnings (loss) per Common Partnership Unit:
Continuing operations	$ (0.15	)	$ (0.29	)	$ (0.04	)
Discontinued operations	0.06		0.10		0.04
	$ (0.09	)	$ (0.19	)	$ —
Basic weighted average common partnership units outstanding	145,118,841		137,454,796		114,712,869
Diluted weighted average common partnership units outstanding	145,118,841		137,454,796		116,066,115
Net income (loss) attributable to Brandywine Operating Partnership
Income (loss) from continuing operations	$ (13,232	)	$ (31,276	)	$ 3,558
Income (loss) from discontinued operations	8,517		13,670		4,501
Net income (loss)	$ (4,715	)	$ (17,606	)	$ 8,059

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	For the year ended December 31, — 2011		2010		2009
Net income (loss)	$ (4,715	)	$ (17,606	)	$ 8,089
Comprehensive income:
Unrealized gain (loss) on derivative financial instruments	(4,499	)	7,320		7,395
Ineffectiveness of the hedges	—		—		(125	)
Reclassification of realized (gains)/losses on derivative financial instruments to operations, net	153		28		(184	)
Total comprehensive income (loss)	(4,346	)	7,348		7,086
Comprehensive income (loss)	(9,061	)	(10,258	)	15,175
Comprehensive (income) loss attributable to non-controlling interest	—		—		(30	)
Comprehensive income (loss) attributable to Brandywine Operating Partnership	$ (9,061	)	$ (10,258	)	$ 15,145

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY

For the Years Ended December 31, 2011 , 2010 and 2009

(in thousands, except Units)

	Series D Preferred Mirror Units — Units	Amount	Series E Preferred Mirror Units — Units	Amount	General Partner Capital — Units		Amount		Accumulated Other Comprehensive Income		Non-controlling Interest Consolidated Real Estate Ventures		Total Partners’ Equity
BALANCE, December 31, 2008	2,000,000	$ 47,912	2,300,000	$ 55,538	88,158,937		$ 1,581,887		$ (17,005	)	$ —		$ 1,668,332
Net income	—	—	—	—	—		8,059		—		30		8,089
Other comprehensive income	—	—	—	—	—		—		7,086		—		7,086
Deferred compensation obligation	—	—	—	—	51,058		131		—		—		131
Issuance of LP Units	—	—	—	—	40,250,000		242,323		—		—		242,323
Bonus share issuance	—	—	—	—	36,826		123		—		—		123
Conversion of LP Units to common shares	—	—	—	—	7,513		254		—		—		254
Share choice plan	—	—	—	—	(7,081	)	(46	)	—		—		(46	)
Vesting of restricted units	—	—	—	—	86,172		(213	)	—		—		(213	)
Restricted stock amortization	—	—	—	—	—		3,286		—		—		3,286
Restricted performance units amortization	—	—	—	—	—		288		—		—		288
Outperformance plan amortization	—	—	—	—	—		927		—		—		927
Option amortization	—	—	—	—	—		602		—		—		602
Trustee fees paid in shares	—	—	—	—	13,987		152		—		—		152
Adjustment of redeemable partnership units to liquidation value at period end	—	—	—	—	—		8,213		—		—		8,213
Adjustment to non-controlling interest	—	—	—	—	—		—		—		35		35
Other	—	—	—	—	—		—		491		—		491
Distributions to Preferred Mirror Units	—	—	—	—	—		(7,992	)	—		—		(7,992	)
Distributions to general partnership unitholder	—	—	—	—	—		(54,961	)	—		—		(54,961	)
BALANCE, December 31, 2009	2,000,000	$ 47,912	2,300,000	$ 55,538	128,597,412		$ 1,783,033		$ (9,428	)	$ 65		$ 1,877,120
Net loss	—	—	—	—	—		(17,606	)	—		—		(17,606	)
Other comprehensive income	—	—	—	—	—		—		7,348		—		7,348
Deferred compensation obligation	—	—	—	—	(2,409	)	—		—		—		—
Issuance of LP Units	—	—	—	—	5,742,268		71,981		—		—		71,981
Bonus share issuance	—	—	—	—	32,607		369		—		—		369
Conversion of LP Units to common shares	—	—	—	—	17,468		466		—		—		466
Vesting of restricted units	—	—	—	—	76,598		(227	)	—		—		(227	)
Restricted stock amortization	—	—	—	—	—		3,483		—		—		3,483
Restricted performance units amortization	—	—	—	—	—		965		—		—		965
Outperformance plan amortization	—	—	—	—	—		380		—		—		380
Option amortization	—	—	—	—	—		1,132		—		—		1,132
Trustee fees paid in shares	—	—	—	—	8,412		98		—		—		98
Exercise of options	—	—	—	—	12,761		37		—		—		37
Adjustment of redeemable partnership units to liquidation value at period end	—	—	—	—	—		(13,839	)	—		—		(13,839	)
Adjustment to non-controlling interest	—	—	—	—	—		—		—		(27	)	(27	)

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Cumulative effect of accounting change for variable interest entities	—	—	—	—	—		1,439		—		(38	1,401
Distributions to Preferred Mirror Units	—	—	—	—	—		(7,992	)	—		—	(7,992	)
Distributions to general partnership unitholder	—	—	—	—	—		(80,170	)	—		—	(80,170	)
BALANCE, December 31, 2010	2,000,000	$ 47,912	2,300,000	$ 55,538	134,485,117		$ 1,743,549		$ (2,080	)	$ —	$ 1,844,919
Net loss	—	—	—	—	—		(4,715	)	—		—	(4,715	)
Other comprehensive income	—	—	—	—	—		—		(4,346	)	—	(4,346	)
Deferred compensation obligation	—	—	—	—	(845	)	(16	)	—		—	(16	)
Issuance of LP Units	—	—	—	—	679,285		8,272		—		—	8,272
Bonus share issuance	—	—	—	—	463		6		—		—	6
Conversion of LP Units to common shares	—	—	—	—	7,204,104		86,038		—		—	86,038
Share choice plan issuance	—	—	—	—	(1,684	)	(55	)	—		—	(55	)
Common partnership units cancellation	—	—	—	—	—		—		—		—	—
Vesting of restricted units	—	—	—	—	201,464		(352	)	—		—	(352	)
Restricted stock amortization	—	—	—	—	—		2,937		—		—	2,937
Restricted performance units amortization	—	—	—	—	—		1,679		—		—	1,679
Outperformance plan amortization	—	—	—	—	—		123		—		—	123
Option amortization	—	—	—	—	—		1,487		—		—	1,487
Trustee fees paid in shares	—	—	—	—	2,672		32		—		—	32
Exercise of options	—	—	—	—	120,179		350		—		—	350
Adjustment of redeemable partnership units to liquidation value at period end	—	—	—	—	—		5,778		—		—	5,778
Distributions to Preferred Mirror Units	—	—	—	—	—		(7,992	)	—		—	(7,992	)
Distributions to general partnership unitholder	—	—	—	—	—		(82,819	)	—		—	(82,819	)
BALANCE, December 31, 2011	2,000,000	$ 47,912	2,300,000	$ 55,538	142,690,755		$ 1,754,302		$ (6,426	)	$ —	$ 1,851,326

The accompanying notes are an integral part of these consolidated financial statements.

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BRANDYWINE OPERATING PARTNERSHIP, L.P.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	For the year ended December 31, — 2011		2010		2009
Cash flows from operating activities:
Net income (loss)	$ (4,715	)	$ (17,606	)	8,089
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	219,110		214,776		210,463
Amortization of deferred financing costs	4,991		3,770		5,864
Amortization of debt discount/(premium), net	1,567		831		3,495
Straight-line rent income	(20,298	)	(13,705	)	(9,116	)
Amortization of acquired above (below) market leases, net	(5,384	)	(5,960	)	(6,661	)
Straight-line ground rent expense	1,924		1,647		1,473
Provision for doubtful accounts	1,924		2,479		5,371
Non-cash compensation expense	4,270		4,814		5,200
Recognized hedge activity	—		—		916
Provision for impairment on discontinued operations	—		—		3,700
Real estate venture income in excess of cumulative distributions	(1,175	)	(4,648	)	(2,512	)
Loss on real estate venture formation	222		—		—
Net loss (gain) on sale of interests in real estate	(10,008	)	(11,011	)	(1,237	)
Loss (gain) on early extinguishment of debt	2,776		2,110		(23,176	)
Cumulative interest accretion of repayments of unsecured notes	(4,005	)	(3,433	)	(5,009	)
Contributions from historic tax credit transaction, net of deferred costs	2,694		27,396		23,763
Historic tax credit transaction income	(12,026	)	—		—
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(856	)	(4,173	)	3,746
Other assets	(2,083	)	(2,782	)	2,373
Accounts payable and accrued expenses	7,732		(7,980	)	(4,081	)
Deferred income, gains and rents	(7,220	)	(6,412	)	3,059
Other liabilities	(425	)	5,014		(5,315	)
Net cash from operating activities	179,015		185,127		220,405
Cash flows from investing activities:
Acquisition of properties	(40,674	)	(50,681	)	—
Sales of properties, net	155,956		50,089		101,305
Proceeds from repayment of mortgage notes receivable	—		40,000		—
Capital expenditures	(131,156	)	(180,943	)	(211,892	)
Advances for purchase of tenant assets, net of repayments	1,365		(1,715	)	—
Loan provided to an unconsolidated Real Estate Venture partner	—		(826	)	—
Investment in unconsolidated Real Estate Ventures	(5,277	)	(5,180	)	(14,980	)
Escrowed cash	—		—		31,385
Cash distributions from unconsolidated Real Estate Ventures in excess of cumulative equity income	10,316		2,205		13,062
Decrease in cash due to the deconsolidation of variable interest entities	—		(1,382	)	—
Leasing costs	(38,461	)	(23,503	)	(21,429	)

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Net cash used in investing activities	(47,931	)	(171,936	)	(102,549	)
Cash flows from financing activities:
Proceeds from Credit Facility borrowings	706,002		565,000		983,000
Repayments of Credit Facility borrowings	(613,502	)	(474,000	)	(1,044,000	)
Proceeds from mortgage notes payable	—		256,104		149,800
Repayments of mortgage notes payable	(221,856	)	(51,966	)	(84,102	)
Repayments unsecured term loan	(145,500	)	—		—
Proceeds from unsecured notes	321,448		—		247,030
Repayments of unsecured notes	(105,381	)	(276,270	)	(514,004	)
Proceeds from financing activity	—		—		—
Net settlement of hedge transactions	(613	)	—		(5,044	)
Debt financing costs	(4,249	)	(595	)	(24,620	)
Refund of deferred financing costs related to forward commitment	—		1,659		—
Net proceeds from issuance of operating units	7,930		70,867		242,332
Exercise of unit options	350		37		—
Distributions paid to preferred and common partnership unitholders	(91,868	)	(89,029	)	(70,605	)
Net cash from (used in) financing activities	(147,239	)	1,807		(120,213	)
Increase (decrease) in cash and cash equivalents	(16,155	)	14,998		(2,357	)
Cash and cash equivalents at beginning of year	16,565		1,567		3,924
Cash and cash equivalents at end of year	$ 410		$ 16,565		$ 1,567
Supplemental disclosure:
Cash paid for interest, net of capitalized interest during the years ended December 31, 2011, 2010 and 2009 of $1,997, $10,385, and $8,893, respectively	$ 135,210		$ 135,206		$ 139,636
Supplemental disclosure of non-cash activity:
Note receivable issued related to the sale of the two Trenton properties, net of $12.9 million deferred gain	—		—		9,600
Settlement of note receivable through foreclosure of a parcel of land	—		(2,795	)	—
Proceeds from mortgage notes payable retained by lender and included in other assets (see Note 7)	—		396		—
Change in capital expenditures financed through accounts payable at period end	(3,896	)	(5,126	)	7,086
Change in capital expenditures financed through retention payable at period end	(6,213	)	(2,066	)	5,862
Change in unfunded tenant allowance	(1,717	)	—		5,986
Change in real estate investments due to the deconsolidation of variable interest entities	—		(37,126	)	—
Change in mortgage notes payable due to the deconsolidation of variable interest entities	—		(42,877	)	—
Change in non-controlling interest from issuance of limited partnership units (see Note 3)	—		77,733		—

The accompanying notes are an integral part of these consolidated financial statements.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

DECEMBER 31, 2011, 2010 AND 2009

ORGANIZATION OF THE PARENT COMPANY AND THE OPERATING PARTNERSHIP

The Parent Company is a self-administered and self-managed real estate investment trust (“REIT”) that provides leasing, property management, development, redevelopment, acquisition and other tenant-related services for a portfolio of office and industrial properties. The Parent Company owns its assets and conducts its operations through the Operating Partnership and subsidiaries of the Operating Partnership. The Parent Company is the sole general partner of the Operating Partnership and, as of December 31, 2011 , owned a 98.1% interest in the Operating Partnership. The Parent Company’s common shares of beneficial interest are publicly traded on the New York Stock Exchange under the ticker symbol “BDN”.

As of December 31, 2011 , the Company owned 207 office properties, 20 industrial facilities and five mixed-use properties (collectively, the “Properties”) containing an aggregate of approximately 25.2 million net rentable square feet. In addition, as of December 31, 2011 , the Company owned economic interests in 18 unconsolidated real estate ventures that contain approximately 6.7 million net rentable square feet (collectively, the “Real Estate Ventures”). As of December 31, 2011 , the Company also owned 444 acres of undeveloped land, and held options to purchase approximately 52 additional acres of undeveloped land. The Properties and the properties owned by the Real Estate Ventures are located in or near Philadelphia, Pennsylvania, Metropolitan Washington, D.C., Southern and Central New Jersey, Richmond, Virginia, Wilmington, Delaware, Austin, Texas and Oakland, Concord, Carlsbad and Rancho Bernardo, California. In addition to managing properties that the Company owns, as of December 31, 2011 , the Company was managing approximately 7.4 million net rentable square feet of office and industrial properties for third parties and the Real Estate Ventures.

All references to building square footage, acres, occupancy percentage and the number of buildings are unaudited.

The Company conducts its third-party real estate management services business primarily through six management companies (collectively, the “Management Companies”): Brandywine Realty Services Corporation (“BRSCO”), BTRS, Inc. (“BTRS”), Brandywine Properties I Limited, Inc. (“BPI”), BDN Brokerage, LLC (“BBL”), Brandywine Properties Management, L.P. (“BPM”) and Brandywine Brokerage Services, LLC (“BBS”). Each of BRSCO, BTRS and BPI is a taxable REIT subsidiary. As of December 31, 2011 , the Operating Partnership owns, directly and indirectly, 100% of each of BRSCO, BTRS, BPI, BBL and BPM.

As of December 31, 2011 , the Management Companies were managing properties containing an aggregate of approximately 32.6 million net rentable square feet, of which approximately 25.2 million net rentable square feet related to Properties owned by the Company and approximately 7.4 million net rentable square feet related to properties owned by third parties and the Real Estate Ventures.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Reclassifications

Certain amounts have been reclassified in prior years to conform to the current year presentation with no effect to previously reported net income and equity. The reclassifications are primarily due to the treatment of sold properties as discontinued operations on the statement of operations for all periods presented.

Principles of Consolidation

When the Company obtains an economic interest in an entity, the Company evaluates the entity to determine if the entity is deemed a variable interest entity (“VIE”), and if the Company is deemed to be the primary beneficiary, in accordance with the accounting standard for the consolidation of variable interest entities. The accounting standard for the consolidation of VIEs requires the Company to qualitatively assess if the Company was the primary beneficiary of the VIEs based on whether the Company had both (i) the power to direct those matters that most significantly impacted the activities of the VIE and (ii) the obligation to absorb losses or the right to receive benefits of the VIE that could potentially be significant to the VIE. For entities that the Company has determined to be VIEs but for which it is not the primary beneficiary, its maximum exposure to loss is the carrying amount of its investments, as the Company has not provided any guarantees other than the guarantee described for PJP VII which was approximately $0.7 million at December 31, 2011 (see Note 4). Also, for all entities determined to be VIEs, the Company does not provide financial support to the real estate ventures through liquidity arrangements, guarantees or other similar commitments. When an entity is not deemed to be a VIE, the Company considers the provisions of the same accounting standard to determine whether a general partner, or the general partners as a group, controls a limited partnership or similar entity when the limited partners have certain rights. The Company consolidates (i) entities that are VIEs and of which the Company is deemed to be the primary beneficiary and (ii) entities that are non-VIEs and controlled by the Company and in which the limited partners neither

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have the ability to dissolve the entity or remove the Company without cause nor any substantive participating rights. Entities that the Company accounts for under the equity method (i.e., at cost, increased or decreased by the Company's share of earnings or losses, plus contributions, less distributions) include (i) entities that are VIEs and of which the Company is not deemed to be the primary beneficiary (ii) entities that are non-VIEs which the Company does not control, but over which the Company has the ability to exercise significant influence and (iii) entities that are non-VIEs that the Company controls through its general partner status, but the limited partners in the entity have the substantive ability to dissolve the entity or remove the Company without cause or have substantive participating rights. The Company continuously assesses its determination of whether an entity is a VIE and who the primary beneficiary is, and whether or not the limited partners in an entity have substantive rights, more particularly if certain events occur that are likely to cause a change in the original determinations. The Company's assessment includes a review of applicable documents such as, but not limited to, applicable partnership agreements, real estate venture agreements, LLC agreements, management and leasing agreements to determine whether the Company has control to direct the business activities of the entities. The portion of the entities that are consolidated but not owned by the Company is presented as non-controlling interest as of and during the periods consolidated. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. Management makes significant estimates regarding revenue, valuation of real estate and related intangible assets and liabilities, useful lives of fixed assets, impairment of long-lived assets, equity method investments, allowance for doubtful accounts and deferred costs.

Operating Properties

Operating properties are carried at historical cost less accumulated depreciation and impairment losses. The cost of operating properties reflects their purchase price or development cost. Acquisition related costs are expensed as incurred. Costs incurred for the renovation and betterment of an operating property are capitalized to the Company’s investment in that property. Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives. Fully-depreciated assets are removed from the accounts.

Purchase Price Allocation

The Company allocates the purchase price of properties to net tangible and identified intangible assets acquired based on fair values. Above-market and below-market in-place lease values for acquired properties are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) the Company’s estimate of the fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease (includes the below market fixed renewal period). Capitalized above-market lease values are amortized as a reduction of rental income over the remaining non-cancelable terms of the respective leases. Capitalized below-market lease values are amortized as an increase to rental income over the remaining non-cancelable terms of the respective leases, including any below market fixed-rate renewal periods.

Other intangible assets also include amounts representing the value of tenant relationships and in-place leases based on the Company’s evaluation of the specific characteristics of each tenant’s lease and the Company’s overall relationship with the respective tenant. The Company estimates the cost to execute leases with terms similar to the remaining lease terms of the in-place leases, including leasing commissions, legal and other related expenses. This intangible asset is amortized to expense over the remaining term of the respective leases and any fixed-rate bargain renewal periods. Company estimates of value are made using methods similar to those used by independent appraisers or by using independent appraisals. Factors considered by the Company in this analysis include an estimate of the carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. In estimating carrying costs, the Company includes real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease-up periods, which primarily range from three to twelve months. The Company also considers information obtained about each property as a result of its pre-acquisition due diligence, marketing and leasing activities in estimating the fair value of the tangible and intangible assets acquired. The Company also uses the information obtained as a result of its pre-acquisition due diligence as part of its consideration of the accounting standard governing asset retirement obligations and when necessary, will record a conditional asset retirement obligation as part of its purchase price.

Characteristics considered by the Company in allocating value to its tenant relationships include the nature and extent of the Company’s business relationship with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals, among other factors. The value of tenant relationship intangibles is amortized over the

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remaining initial lease term and expected renewals, but in no event longer than the remaining depreciable life of the building. The value of in-place leases is amortized over the remaining non-cancelable term of the respective leases and any fixed-rate renewal periods.

In the event that a tenant terminates its lease, the unamortized portion of each intangible, including in-place lease values and tenant relationship values, is charged to expense and market rate adjustments (above or below) are recorded to revenue.

Depreciation and Amortization

The costs of buildings and improvements are depreciated using the straight-line method based on the following useful lives: buildings and improvements (five to 55 years) and tenant improvements (the shorter of the lease term or the life of the asset).

The Company's current year consolidated statement of operations contained an out of period depreciation and amortization expense adjustment of $4.7 million relating to intangible assets representing tenant relationships and in-place leases that should have been written off in prior periods. This resulted in the overstatement of depreciation and amortization expense by $4.7 million in the current year. During the year ended December 31, 2010 , depreciation and amortization expense was overstated by $1.7 million and was understated by $1.4 million , $1.8 million , $1.7 million and $1.5 million during the years ended December 31, 2009 , 2008 , 2007 , and 2006 , respectively. As management believes that this error was not material to prior years' consolidated financial statements and that the impact of recording the error in the current year is not material to the Company's consolidated financial statements, the Company recorded the related adjustment during the current year.

During 2010 , the Company also recorded depreciation expense of $1.2 million related to projects completed in prior years that were not closed out of the Company’s job cost system in a timely manner. This resulted in the understatement of depreciation expense in the prior years. During the years ended December 31, 2009 and 2008 , depreciation expense was understated by $0.9 million and $0.2 million , respectively. These errors, both individually and in aggregate, were not material to prior years’ consolidated financial statements and the impact of correcting this error in the current year is not material to the Company’s full year consolidated financial statements.

Construction in Progress

Project costs directly associated with the development and construction of a real estate project are capitalized as construction in progress. Construction in progress also includes costs related to ongoing tenant improvement projects. In addition, interest, real estate taxes and other expenses that are directly associated with the Company’s development activities are capitalized until the property is placed in service. Internal direct construction costs totaling $3.5 million in 2011 , $3.4 million in 2010 , $3.9 million in 2009 and interest totaling $2.0 million in 2011 , $10.4 million in 2010 , and $8.9 million in 2009 were capitalized related to development of certain Properties and land holdings.

During the years ended December 31, 2011 , 2010 and 2009 , the Company's internal direct construction costs are comprised entirely of capitalized salaries. The following table shows the amount of salaries (including bonuses and benefits) capitalized for the years presented (in thousands):

	December 31, — 2011	2010	2009
Development	$ —	$ 2,331	$ 1,772
Redevelopment	—	127	398
Tenant Improvements	3,539	940	1,757
Total	$ 3,539	$ 3,398	$ 3,927

Impairment or Disposal of Long-Lived Assets

The Company reviews long-lived assets whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. The review of recoverability is based on an estimate of the future undiscounted cash flows (excluding interest charges) expected to result from the long-lived asset’s use and eventual disposition. These cash flows consider factors such as expected future operating income, trends and prospects, as well as the effects of leasing demand, competition and other factors. If impairment exists due to the inability to recover the carrying value of a long-lived asset, an impairment loss is recorded to the extent that the carrying value exceeds the estimated fair-value of the property. The Company is required to make subjective assessments as to whether there are impairments in the values of the investments in long-lived assets. These assessments have a direct impact on its net income because recording an impairment loss results in an immediate negative adjustment to net income. The evaluation of anticipated cash flows is highly subjective and is based in part on assumptions regarding future occupancy,

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rental rates and capital requirements that could differ materially from actual results in future periods. Although the Company’s strategy is generally to hold its properties over the long-term, the Company will dispose of properties to meet its liquidity needs or for other strategic needs. If the Company’s strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may be recognized to reduce the property to the lower of the carrying amount or fair value less costs to sell, and such loss could be material. If the Company determines that impairment has occurred and the assets are classified as held and used, the affected assets must be reduced to their fair value.

During the Company’s impairment review for the years ended December 31, 2011 and 2010 , the Company determined that no impairment charges were necessary. For the year ended December 31, 2009 , the Company determined that one of its properties, during testing for impairment under the held and used model, had a historical cost greater than the probability-weighted undiscounted cash flows. Accordingly, the recorded amount was reduced to an amount equal to management’s estimate of the then current fair value. This property was sold in the second quarter of 2009 .

The Company entered into development agreements related to two parcels of land under option for ground lease that require the Company to commence development by December 31, 2012 . If the Company determines that it will not be able to start the construction by the date specified, or if the Company determines development is not in its best economic interest and an extension of the development period cannot be negotiated, the Company will have to write off all costs that it has incurred in preparing these parcels of land for development amounting to $7.7 million as of December 31, 2011 .

Cash and Cash Equivalents

Cash and cash equivalents are highly-liquid investments with original maturities of three months or less. The Company maintains cash equivalents in financial institutions in excess of insured limits, but believes this risk is mitigated by only investing in or through major financial institutions.

Restricted Cash

Restricted cash consists of cash held as collateral to provide credit enhancement for the Company’s mortgage debt, cash for property taxes, capital expenditures and tenant improvements. Restricted cash is included in other assets as discussed below.

Accounts Receivable and Accrued Rent Receivable

Leases with tenants are accounted for as operating leases. Minimum annual rentals under tenant leases are recognized on a straight-line basis over the term of the related lease. The cumulative difference between lease revenue recognized under the straight-line method and contractual lease payment terms is recorded as “accrued rent receivable, net” on the accompanying balance sheets. Included in current tenant receivables are tenant reimbursements which are comprised of amounts recoverable from tenants for common area maintenance expenses and certain other recoverable expenses that are recognized as revenue in the period in which the related expenses are incurred. As of December 31, 2011 and 2010 , no tenant represented more than 10% of accounts receivable and accrued rent receivable.

Tenant receivables and accrued rent receivables are carried net of the allowances for doubtful accounts of $3.4 million and $12.1 million in 2011 , respectively and $3.7 million and $11.6 million in 2010 , respectively. The allowance is an estimate based on two calculations that are combined to determine the total amount reserved. First, the Company evaluates specific accounts where it has determined that a tenant may have an inability to meet its financial obligations. In these situations, the Company uses its judgment, based on the facts and circumstances, and records a specific reserve for that tenant against amounts due to reduce the receivable to the amount that the Company expects to collect. These reserves are reevaluated and adjusted as additional information becomes available. Second, a reserve is established for all tenants based on a range of percentages applied to receivable aging categories for tenant receivables. For accrued rent receivables, the Company considers the results of the evaluation of specific accounts and also considers other factors including assigning risk factors to different industries based on its tenants SIC classification. Considering various factors including assigning a risk factor to different industries, these percentages are based on historical collection and write-off experience adjusted for current market conditions, which requires management’s judgments.

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Investments in Unconsolidated Real Estate Ventures

The Company accounts for its investments in unconsolidated Real Estate Ventures under the equity method of accounting as it is not the primary beneficiary (for VIE’s) and the Company exercises significant influence, but does not control these entities under the provisions of the entities’ governing agreements pursuant to the accounting standard for the consolidation of VIEs. Under the equity method, investments in unconsolidated Real Estate Ventures are recorded initially at cost, as Investments in Real Estate Ventures, and subsequently adjusted for equity in earnings, cash contributions, less distributions and impairments. On a periodic basis, management also assesses whether there are any indicators that the value of the Company’s investments in unconsolidated Real Estate Ventures may be other than temporarily impaired. An investment is impaired only if the value of the investment, as estimated by management, is less than the carrying value of the investment and the decline is other than temporary. To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the investment over the value of the investment, as estimated by management. The determination as to whether an impairment exists requires significant management judgment about the fair value of its ownership interest. Fair value is determined through various valuation techniques, including but not limited to, discounted cash flow models, quoted market values and third party appraisals.

To the extent that the Company acquires an interest in or contributes assets to a Real Estate Venture project, the difference between the Company’s cost basis in the investment and the value of the Real Estate Venture or asset contributed is amortized over the life of the related assets, intangibles and liabilities and such adjustment is included in the Company’s share of equity in income of unconsolidated Real Estate Ventures. For purposes of cash flow presentation, distributions from unconsolidated Real Estate Ventures are presented as part of operating activities when they are considered as return on investments. Distributions in excess of the Company’s share in the cumulative unconsolidated Real Estate Ventures’ earnings are considered as return of investments and are presented as part of investing activities in accordance with the accounting standard for cash flow presentation.

Deferred Costs

Costs incurred in connection with property leasing are capitalized as deferred leasing costs. Deferred leasing costs consist primarily of leasing commissions and internal leasing costs that are amortized using the straight-line method over the life of the respective lease which generally ranges from one to 15 years . Management re-evaluates the remaining useful lives of leasing costs as economic and market conditions change.

Costs incurred in connection with debt financing are capitalized as deferred financing costs and charged to interest expense over the terms of the related debt agreements. Deferred financing costs consist primarily of loan fees which are amortized over the related loan term on a basis that approximates the effective interest method.

Other Assets

Other assets is comprised of the following as of December 31, 2011 (in thousands):

	December 31, — 2011	2010
Prepaid Ground Rent	$ 7,615	$ 7,704
Prepaid Real Estate Taxes	7,983	7,648
Rent inducements, net	7,572	6,262
Cash surrender value of life insurance	9,261	8,128
Restricted cash	2,528	4,029
Marketable securities	2,366	2,614
Prepaid insurance	2,589	2,432
Furniture, fixtures and equipment	634	1,613
Deposits on future settlements	3,884	2,035
Others	8,726	12,232
Total	$ 53,158	$ 54,697

Notes Receivable

As of December 31, 2011 , notes receivable included a $7.2 million purchase money mortgage with a 20 year amortization period that bears interest at 8.5% , a $0.5 million loan (due in 2015 ) that bears interest at 10% , and a $23.4 million (including accrued but unpaid interest) seven year purchase money mortgage (due 2016 ) that bears interest at approximately 6% cash pay/ 7.64% accrual.

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The $23.4 million notes receivable is related to the sale of the two Trenton properties in 2009 and is presented net of the $12.9 million deferred gain in accordance with the accounting standard for installment sales (the “Trenton Note”). The Company expects to receive $27.8 million at maturity of the Trenton Note including the difference between the cash payments and the stated accrual rate.

The Company periodically assesses the collectability of the notes receivable in accordance with the accounting standard for loan receivables. The Company's $7.2 million outstanding purchase money mortgage note as mentioned above was extended to a buyer (the “Borrower”) of its parcel of land in Newtown, Pennsylvania in December 2006 . During 2011 , the Borrower, who is developing a residential community, defaulted on the note and as a result, a forbearance agreement was entered into between the Company and the Borrower. The Borrower also entered into another forbearance agreement with a third party senior creditor bank related to its own loan. The forbearance agreement between the Company and the Borrower outlined the repayment terms of the outstanding debt and the payment of accrued interest by the Borrower and included, among other things, the metrics for selling and settling on home sales over an agreed period of time. With the inherent credit risk in collecting interest from the note, as provided in the forbearance agreement, the Company will provide a full allowance for any accrued interest receivable. The Company has determined that the loan modification as discussed above represents a troubled debt restructuring since the Borrower was considered to be in a financial difficulty when it defaulted on the two mortgage debts and that a concession was granted in the form of the forbearance agreements. Construction has already recommenced while loan repayments are scheduled to start in 2012 . The Company believes that based on terms of the forbearance agreement, the total note will be fully paid by 2014 . At December 31, 2011, the Company assessed the status of the metrics outlined in the forbearance agreement and determined that the Borrower will have difficulty meeting its sales targets for the first quarter of 2012. The Borrower provided the Company and the third party senior creditor bank with expected future cash flows analysis showing its ability to meet its sales targets in 2012 to avoid being in default. The Company and the third party senior creditor bank allowed the Borrower to operate under the cash flow assumptions without amending the forbearance agreements. Given the current circumstances, the Company performed an impairment assessment of its note using the expected cash flow information provided by the Borrower and obtained third party documentation to support the assumptions used by the Borrower. The key assumptions used in the cash flow analysis included the revenue per home built; the cost to construct; the general and administrative expenses incurred to operate the business and sell homes; and the absorption assumptions used to determine the rate of home sales. The Company has determined based on the results of its probability weighted cash flow analysis that, as of December 31, 2011 , the present value of the expected cash flows of the note receivable exceeded the outstanding balance of the note and therefore the note is recoverable as of December 31, 2011 . However, it is still possible that the terms of the forbearance agreement may not be met due to non-performance by the Borrower of the conditions set forth in the said agreement or due to further deterioration in the housing market and could cause a loan loss of the Company's note receivable which could be material to its consolidated results of operations.

As of December 31, 2010 , notes receivable included a $7.4 million purchase money mortgage with a 20 year amortization period that bears interest at 8.5% , a $0.8 million loan (due in 2015 including accrued interest) that bears interest at 10% , and a $22.9 million (including accrued but unpaid interest) seven year purchase money mortgage (due 2016 ) that bears interest at approximately 6% cash pay/ 7.64% accrual. See related discussion about the Trenton Note above. In December 2010 , the Company also extended a loan to one of its unconsolidated Real Estate Venture partners. The said loan bears interest at 10% and will be due including the accrued interest in 2015 .

On December 29, 2010 , the Company foreclosed on one of its note receivables amounting to $2.8 million (See Note 3 for related discussion). Except for the default on the purchase money mortgage in the current year as discussed above and the foreclosure of note receivables in the prior year, there were no other collectability issues noted as of December 31, 2011 and 2010 .

Revenue Recognition

Rental revenue is recognized on the straight-line basis from the later of the date of the commencement of the lease or the date of acquisition of the property subject to existing leases, which averages minimum rents over the terms of the leases. The straight-line rent adjustment increased revenue by approximately $17.9 million in 2011 , $10.9 million in 2010 , and $6.4 million in 2009 . Deferred rents on the balance sheet represent rental revenue received prior to their due dates and amounts paid by the tenant for certain improvements considered to be landlord assets that will remain as the Company’s property at the end of the tenant’s lease term. The amortization of the amounts paid by the tenant for such improvements is calculated on a straight-line basis over the term of the tenant’s lease and is a component of straight-line rental income and increased revenue by $2.4 million in 2011 , $2.8 million in 2010 , and $2.7 million in 2009 . Lease incentives, which are included as reductions of rental revenue in the accompanying consolidated statements of operations, are recognized on a straight-line basis over the term of the lease. Lease incentives decreased revenue by $1.6 million in 2011 , $1.5 million in 2010 , and $1.8 million in 2009 .

Leases also typically provide for tenant reimbursement of a portion of common area maintenance and other operating expenses to the extent that a tenant’s pro rata share of expenses exceeds a base year level set in the lease or to the extent that the tenant has a lease on a triple net basis. For certain leases, significant assumptions and judgments are made by the Company in determining

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the lease term such as when termination options are provided to the tenant. The lease term impacts the period over which minimum rents are determined and recorded and also considers the period over which lease related costs are amortized. Termination fees received from tenants, bankruptcy settlement fees, third party management fees, labor reimbursement and leasing income are recorded when earned.

During 2011 , the Company recorded additional income of $0.5 million related to electricity charges in prior years that were under-billed to a certain tenant. This resulted in the overstatement of total revenue by $0.5 million during the current year and in the understatement of total revenue by $0.3 million and $0.2 million for the years ended December 31, 2009 and 2008 , respectively. As management believes that this error was not material to prior years' consolidated financial statements and that the impact of recording the error in the current year is not material to the Company's consolidated financial statements, the Company recorded the related adjustment in the current year.

No tenant represented greater than 10% of the Company’s rental revenue in 2011 , 2010 or 2009 .

Income Taxes

Parent Company

The Parent Company has elected to be treated as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”). In order to continue to qualify as a REIT, the Parent Company is required to, among other things, distribute at least 90% of its annual REIT taxable income to its shareholders and meet certain tests regarding the nature of its income and assets. As a REIT, the Parent Company is not subject to federal and state income taxes with respect to the portion of its income that meets certain criteria and is distributed annually to its shareholders. Accordingly, no provision for federal and state income taxes is included in the accompanying consolidated financial statements with respect to the operations of the Parent Company. The Parent Company intends to continue to operate in a manner that allows it to meet the requirements for taxation as a REIT. If the Parent Company fails to qualify as a REIT in any taxable year, it will be subject to federal and state income taxes and may not be able to qualify as a REIT for the four subsequent tax years. The Parent Company is subject to certain local income taxes. Provision for such taxes has been included in general and administrative expenses in the Parent Company’s Consolidated Statements of Operations and Comprehensive Income.

The tax basis of the Parent Company’s assets was $4.5 billion as of December 31, 2011 and 2010 , respectively.

The Parent Company is subject to a 4% federal excise tax if sufficient taxable income is not distributed within prescribed time limits. The excise tax equals 4% of the annual amount, if any, by which the sum of (a) 85% of the Parent Company’s ordinary income and (b) 95% of the Parent Company’s net capital gain exceeds cash distributions and certain taxes paid by the Parent Company. No excise tax was incurred in 2011 , 2010 , or 2009 .

The Parent Company may elect to treat one or more of its subsidiaries as taxable REIT subsidiaries (each a “TRS”). A TRS is subject to federal, state and local income tax. In general, a TRS may perform non-customary services for tenants, hold assets that the Parent Company, as a REIT, cannot hold directly and generally may engage in any real estate or non-real estate related business.

Operating Partnership

The tax basis of the Operating Partnership’s assets was $4.5 billion as of December 31, 2011 and 2010 , respectively.

The Operating Partnership is subject to a 4% federal excise tax if sufficient taxable income is not distributed within prescribed time limits. The excise tax equals 4% of the annual amount, if any, by which the sum of (a) 85% of the Operating Partnership’s ordinary income and (b) 95% of the Operating Partnership’s net capital gain exceeds cash distributions and certain taxes paid by the Operating Partnership. No excise tax was incurred in 2011 , 2010 , or 2009 .

The Operating Partnership may elect to treat one or more of its subsidiaries as REITs under Sections 856 through 860 of the Code. Each subsidiary REIT has met or intends to meet the requirements for treatment as a REIT under Sections 856 through 860 of the Code, and, accordingly, no provision has been made for federal and state income taxes in the accompanying consolidated financial statements. If any subsidiary REIT fails to qualify as a REIT in any taxable year, that subsidiary REIT will be subject to federal

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and state income taxes and may not be able to qualify as a REIT for the four subsequent taxable years. Also, each subsidiary REIT may be subject to certain local income taxes.

The Operating Partnership has elected to treat several of its subsidiaries as taxable TRSs, which are subject to federal, state and local income tax.

Earnings Per Unit

Basic earnings per unit is calculated by dividing income allocated to common units by the weighted-average number of units outstanding during the period. Diluted earnings per unit includes the effect of common unit equivalents outstanding during the period.

Treasury Shares

The Company accounts for its treasury share purchases using the cost method. Since repurchase, shares have been reissued at an amount less than their cost basis. The losses on reissuances are charged to the cumulative earnings of the Company using the FIFO basis. As of December 31, 2011 , none of the treasury shares remained outstanding. As of December 31, 2010 , the total number of treasury shares outstanding was 116,679 shares.

Stock-Based Compensation Plans

The Parent Company maintains a shareholder-approved equity-incentive plan known as the Amended and Restated 1997 Long-Term Incentive Plan (the “1997 Plan”). The 1997 Plan is administered by the Compensation Committee of the Parent Company’s Board of Trustees. Under the 1997 Plan, the Compensation Committee is authorized to award equity and equity-based awards, including incentive stock options, non-qualified stock options, restricted shares and performance-based shares. On June 2, 2010, the Parent Company’s shareholders approved amendments to the 1997 Plan that, among other things, increased the number of common shares available for future awards under the 1997 Plan by 6,000,000 (of which 3,600,000 shares are available solely for options and share appreciation rights). As of December 31, 2011 , 5,789,202 common shares remained available for future awards under the 1997 Plan (including 3,971,774 shares available solely for options and share appreciation rights). Through December 31, 2011 , all options awarded under the 1997 Plan had a one to ten-year term.

The Company incurred stock-based compensation expense of $6.4 million during 2011 , of which $1.5 million was capitalized as part of the Company’s review of employee salaries eligible for capitalization. The Company recognized stock-based compensation expense of $6.1 million and $5.3 million during 2010 and 2009 , of which $1.3 million and $0.8 million , respectively, were also capitalized. The expensed amounts are included in general and administrative expense on the Company’s consolidated income statement in the respective periods.

Comprehensive Income

Comprehensive income or loss is recorded in accordance with the provisions of the accounting standard for comprehensive income. The accounting standard establishes standards for reporting comprehensive income and its components in the financial statements. Comprehensive income includes unrealized gains and losses on available-for-sale securities and the effective portions of changes in the fair value of derivatives.

Accounting for Derivative Instruments and Hedging Activities

The Company accounts for its derivative instruments and hedging activities in accordance with the accounting standard for derivative and hedging activities. The accounting standard requires the Company to measure every derivative instrument (including certain derivative instruments embedded in other contracts) at fair value and record them in the balance sheet as either an asset or liability. See disclosures below related to the Company’s adoption of the accounting standard for fair value measurements and disclosures.

For derivatives designated as fair value hedges, the changes in fair value of both the derivative instrument and the hedged item are recorded in earnings. For derivatives designated as cash flow hedges, the effective portions of changes in the fair value of the derivative are reported in other comprehensive income while the ineffective portions are recognized in earnings. During the year ended December 31, 2009 , the Company recorded a $(1.1) million fair value adjustment in its consolidated statements of operations related to two of its interest swaps in which the hedging relationship ceased due to the issuance of its unsecured notes on September 25, 2009. The ineffective portions of the hedges are recognized in earnings. During the year ended December 31, 2009 , the Company recognized a gain of $0.1 million for the ineffective portion of its forward starting swaps prior to the termination of the hedging relationship (See Note 9).

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The Company actively manages its ratio of fixed-to-floating rate debt. To manage its fixed and floating rate debt in a cost-effective manner, the Company, from time to time, enters into interest rate swap agreements as cash flow hedges, under which it agrees to exchange various combinations of fixed and/or variable interest rates based on agreed upon notional amounts.

Fair Value Measurements

The Company estimates the fair value of its outstanding derivatives and available-for-sale-securities in accordance with the accounting standard for fair value measurements and disclosures. The accounting standard defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. It also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value. Financial assets and liabilities recorded on the Consolidated Balance Sheets are categorized based on the inputs to the valuation techniques as follows:

• Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access;

• Level 2 inputs are inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as inputs that are observable for the asset or liability (other than quoted prices), such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals; and

• Level 3 inputs are unobservable inputs for the asset or liability, which is typically based on an entity’s own assumptions, as there is little, if any, related market activity or information.

In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.

The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2011 (in thousands):

Description	Fair Value Measurements at Reporting Date Using: — December 31, 2011	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Unobservable Inputs (Level 3)
Recurring
Assets:
Available-for-Sale Securities	$ —	$ —	$ —	$ —
Liabilities:
Interest Rate Swaps	$ 3,886	$ —	$ 3,886	$ —

The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2010 (in thousands):

Description	Fair Value Measurements at Reporting Date Using: — December 31, 2010	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Unobservable Inputs (Level 3)
Recurring
Assets:
Available-for-Sale Securities	$ 248	$ 248	$ —	$ —

Non-financial assets and liabilities recorded at fair value on a non-recurring basis to which the Company would apply the accounting

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standard where a measurement was required under fair value would include:

• Non-financial assets and liabilities initially measured at fair value in an acquisition or business combination that are not remeasured at least annually at fair value,

• Long-lived assets measured at fair value due to an impairment in accordance with the accounting standard for the impairment or disposal of long-lived assets,

• Equity and cost method investments measured at fair value due to an impairment in accordance with the accounting standard for investments,

• Notes receivable adjusted for any impairment in its value in accordance with the accounting standard for loan receivables; and

• Asset retirement obligations initially measured at fair value under the accounting standard for asset retirement obligations.

There were no items that were accounted for at fair value on a non-recurring basis as of December 31, 2011 .

Accounting Pronouncements Adopted During 2011

In June 2011, the Financial Accounting Standards Board (FASB) issued an amendment to the accounting standard for the presentation of comprehensive income. The amendment requires entities to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. In addition, the amendment requires entities to present on the face of the financial statements reclassification adjustments for items that are reclassified from other comprehensive income to net income in the statement(s) where the components of net income and the components of other comprehensive income are presented. This amendment is effective for fiscal years and interim periods beginning after December 15, 2011. The Company's adoption of the new standard will not have a material impact on its consolidated financial position or results of operations as the amendment relates only to changes in financial statement presentation.

In May 2011, the FASB issued amendments to the accounting standard for fair value measurements and disclosures. The amendments change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. The amendments are intended to create comparability of fair value measurements presented and disclosed in financial statements prepared in accordance with U.S. GAAP and International Financial Reporting Standards. These amendments are effective for fiscal years and interim periods beginning after December 15, 2011. The Company's adoption of the new standard will not have a material impact on its consolidated financial position or results of operations.

In December 2010, the FASB issued a new accounting standard for the disclosure of supplementary pro-forma information for business combinations. This guidance clarifies that the disclosure of supplementary pro-forma information for business combinations should be presented such that revenues and earnings of the combined entity are calculated as though the relevant business combinations that occurred during the current reporting period had occurred as of the beginning of the comparable prior annual reporting period. The guidance also seeks to improve the usefulness of the supplementary pro-forma information by requiring a description of the nature and amount of material, non-recurring pro-forma adjustments that are directly attributable to the business combinations. This new standard is effective for business combinations with an acquisition date on or after the beginning of the first annual reporting period beginning on or after December 15, 2010. The Company's adoption of this new standard did not have a material impact on its consolidated financial position or results of operations.

REAL ESTATE INVESTMENTS

As of December 31, 2011 and 2010 , the gross carrying value of the Company’s Properties was as follows (in thousands):

	December 31, — 2011	2010
Land	$ 677,891	$ 697,724
Building and improvements	3,631,388	3,693,579
Tenant improvements	483,801	442,808
	$ 4,793,080	$ 4,834,111

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Acquisitions and Dispositions

2011

Brandywine-AI Venture

On December 20, 2011 , the Company formed a joint venture, Brandywine - AI Venture LLC, (the "Venture"), with Current Creek Investments, LLC ("Current Creek"), a wholly-owned subsidiary of Allstate Insurance Company. The Company and Current Creek each own a 50% interest in the Venture. The Venture owns three office properties, which the Company to the Venture upon its formation. The contributed office properties contain an aggregate of 587,317 net rentable square feet of and consist of 3130 and 3141 Fairview Park Drive, both located in Falls Church, Virginia, and 7101 Wisconsin Avenue located in Bethesda, Maryland. Concurrent with the Company's contribution of the three properties to the Venture, Current Creek contributed approximately $32.2 million (net of closing costs and customary prorations) to the capital of the Venture and the Venture closed on non-recourse fixed rate mortgage loans in the aggregate amount of $90.0 million , secured by mortgages on each of the three properties. The mortgage loans have a weighted-average maturity of 7.4 years and bear interest at a weighted average rate of 4.4% . The Venture transferred the properties to the Venture based on a $156.0 million valuation. Upon formation of the Venture, the Company received $120.1 million of aggregate proceeds from these transactions net of $2.9 million of transaction and venture formation costs. The Company used the net proceeds to reduce its outstanding indebtedness under its Prior Credit Facility and for general corporate purposes.

Based on facts and circumstances at Venture formation, the Company has determined that the Venture is not a VIE in accordance with the accounting standard for the consolidation of VIEs. As a result, the Company used the voting interest model under the accounting standard for consolidation to determine if it will consolidate the Venture. Based on the provisions within the joint venture agreement, the Company and Current Creek have shared control rights and the Company does not have exclusive control over the properties. Since control is shared, 3130 Fairview Park and 7101 Wisconsin Avenue were deconsolidated by the Company and are accounted for under the equity method of accounting. The Company recorded a net loss on partial sale of $0.1 million related to these two office properties which is included as part of the loss on venture formation in the Company's consolidated statements of operations together with the related $0.1 million basis adjustment on the Company's equity method investment in the Venture. As of December 31, 2011, the carrying amount of the Company's equity investment in this Venture amounted to $24.7 million .

The Company will continue to maintain a regional management and leasing office in 3141 Fairview Park. Consistent with the other two properties, financial control is shared, however, pursuant to the accounting standard for sales-leaseback transactions, the lease maintained by the Company at 3141 Fairview Park and its 50% ownership interest in the Venture results in the Company having continued involvement that will require the property and its related operations to be consolidated by the Company under the financing method. The Company recorded a mortgage debt of $22.0 million and a $7.5 million financing obligation as part of other liabilities in the Company's balance sheet representing the cash it received from the Venture related to this transaction. The Company recognized a nominal amount of interest expense related to the other partner's portion of the property's operation, from Venture formation through December 31, 2011 . As of December 31, 2011 , the balance of the financing obligation amounted to $7.5 million .

The Company's continuing involvement with the properties through its interest in the Venture and its management and leasing activities represents a significant continuing involvement in the properties. Accordingly, under the accounting standard for reporting discontinued operations, the Company has determined that the loss on partial sale and the operations of the properties should not be included as part of discontinued operations in its consolidated statements of operations.

Acquisitions

On August 12, 2011 , the Company acquired an office property located in Philadelphia, Pennsylvania, together with related ground tenancy rights under a long-term ground lease, through the foreclosure of a note receivable amounting to $18.8 million under which the said property was encumbered. The Company obtained the note receivable from a third party on August 2, 2011 which was funded through an advance under its Credit Facility and with available corporate funds. The office property contains 192,707 of net rentable square feet and is currently 57.2% leased as of December 31, 2011 . The Company recognized $0.3 million of transaction costs to acquire the office property which is included as part of general and administrative expenses in the Company's consolidated statements of operations. On the acquisition date of the office property, the total purchase price was allocated as follows: $21.4 million to building, $12.0 million to intangible assets and $14.4 million to below market lease liabilities assumed. The Company also acquired other assets of $0.2 million and assumed certain liabilities of $0.4 million .

On March 28, 2011 , the Company acquired two office properties totaling 126,496 of net rentable square feet in Glen Allen, Virginia known as Overlook I and II for $12.6 million . The acquired properties are 100% leased as of December 31, 2011 . The Company funded the acquisition price through an advance under its Credit Facility and with available corporate funds. The Company

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recognized a nominal amount of acquisition related costs, which are included as part of general and administrative expenses in the Company's consolidated statements of operations.

On January 20, 2011 , the Company acquired a one acre parcel of land in Philadelphia, Pennsylvania for $9.3 million . The Company funded the cost of this acquisition with available corporate funds and a draw on its Credit Facility. The Company capitalized $0.5 million of acquisition related and other costs as part of land inventory on its consolidated balance sheet. On December 29, 2011, the Company contributed the acquired property into a newly formed real estate venture known as Brandywine 1919 Market Ventures (the "1919 Ventures") in return for a 50% general partner interest in the venture . 1919 Ventures is expected to construct a mixed-use development property in the city of Philadelphia. The Company has determined that 1919 Ventures is a VIE due to insufficient equity at the date of formation. It was also determined that the Company will not consolidate 1919 Ventures as both partners have shared power in the venture. Prior to the formation of 1919 Ventures, the Company received $4.9 million from the other partner in anticipation of the real estate venture formation. The amount received was accounted for as a distribution from 1919 Ventures and accordingly reduced the Company's equity investment in the venture in the Company's consolidated balance sheet as of December 31, 2011 .

Dispositions

On November 22, 2011 , the Company sold 442 Creamery Way, a 104,500 net rentable square feet office property located in Exton, PA, for a sales price of $7.4 million . The property was 100.0% occupied as of the date of sale.

On October 28, 2011 , the Company sold two office properties (Five Greentree and Lake Center II) containing a total of 206,243 net rentable square feet located in Marlton, NJ for an aggregate sales price of $22.8 million . Five Greentree and Lake Center II were 92.2% and 47.8% occupied, respectively, as of the date of sale.

On October 14, 2011 , the Company sold an undeveloped parcel of land in Dallas, Texas containing six acres of land for $0.6 million .

On June 27, 2011 , the Company sold Three Greentree Center, a 69,300 net rentable square feet office property located in Marlton, New Jersey, for a sales price of $5.9 million . The property was 13.9% occupied as of the date of sale.

During the first quarter of the 2011, the Company recognized a $2.8 million net gain upon the sale of its remaining 11% ownership interest in three properties which it partially sold to one of its unconsolidated Real Estate Ventures in December 2007. The Company had retained an 11% equity interest in these properties subject to a put/call at fixed prices for a period of three years from the time of the sale. In January 2011 , the Company exercised the put/call and transferred full ownership in the three properties to the Real Estate Venture. Accordingly, the Company's direct continuing involvement through its 11% interest in the properties ceased as a result of the transfer of the ownership interest. The Company has also presented the gain as part of its continuing operations in its consolidated statements of operations because of its prior significant continuing involvement with the properties through its interest in the unconsolidated Real Estate Venture and its management and leasing activities at the properties.

2010

Acquisitions

On August 5, 2010 , the Company acquired a 53 story Class A office tower at 1717 Arch Street (“Three Logan Square”) in Philadelphia, Pennsylvania, together with related ground tenancy rights under a long-term ground lease, from BAT Partners, L.P. Three Logan Square contains approximately 1.0 million of net rentable square feet and is 67.2% leased as of December 31, 2011. The Company acquired Three Logan Square for approximately $129.0 million funded through a combination of $51.2 million in cash and the issuance of 7,111,112 units of limited partnership interest in the Operating Partnership designated as “Class F (2010) Units.” The Class F (2010) Units did not accrue any dividends and were not entitled to allocations of income or loss prior to August 5, 2011, the first anniversary of the closing. Total cash paid after the assumption of security deposit obligations of existing tenants in the property of $0.9 million amounted to $50.3 million . The assumed security deposit obligation is included in other liabilities in the Company’s consolidated balance sheets.The Company funded the cash portion of the acquisition price through an advance under its Prior Credit Facility and with available corporate funds.

For purposes of computing the total purchase price, the Class F (2010) Units were valued based on the closing market price of the Parent Company’s common shares on the acquisition date of $11.54 less the annual dividend rate per share of $0.60 to reflect that these units do not begin to accrue a dividend prior to August 5, 2011. The Class F (2010) Units were subject to redemption at the option of the holder after the first anniversary of the acquisition. The Operating Partnership had the option to satisfy the redemption either for an amount, per unit, of cash equal to the market price of one of the Parent Company’s common shares (based on the five-day trading average ending on the date of the exchange) or for one of the Parent Company’s common shares. On

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December 23, 2011 , the Operating Partnership satisfied in full BAT Partners, L.P.'s tender for redemption of all 7,111,112 of the Class F (2010) Units through the issuance of 7,111,112 of the Parent Company's common shares.

The Company accounted for the acquisition using the acquisition method of accounting. As discussed in Note 2, the Company utilized a number of sources in making estimates of fair values for purposes of allocating the purchase price to tangible and intangibles assets acquired and intangible liabilities assumed. The purchase price is allocated as follows (in thousands):

	August 5,
	2010
Building and tenant improvements	$ 98,188
Intangible assets acquired	28,856
Below market lease liabilities assumed	(683	)
Total	$ 126,361

Intangible assets acquired and intangible liabilities assumed consist of the following (in thousands):

	August 5, 2010	Weighted Average Amortization Period (in years)
Intangible assets:
In-place lease value	$ 13,584	3
Tenant relationship value	8,870	5
Above market tenant leases acquired	895	1
Below market ground lease acquired	5,507	82
Total	$ 28,856	23
Intangible liabilities:
Below market leases acquired	$ 683	1

The Company also recognized tenant and other receivables of $1.1 million and prepaid real estate taxes of $1.5 million from the acquisition and both are included as part of the accounts receivable and the other asset sections, respectively, of the Company’s consolidated balance sheets.

The Company recognized $0.4 million of acquisition related costs which are included as part of general and administrative expenses of the Company’s consolidated statements of operations.

The operating results of the acquired property are included in the Company’s results of operations from the acquisition date and are presented below (in thousands):

	For the period from August 5 to December 31, 2010
Revenue:
Rents	$ 6,347
Tenant Reimbursements	933
Other	45
Total revenue	$ 7,325
Loss from operations (includes depreciation and intangible asset amortization)	$ (3,602	)

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The unaudited pro forma information below summarizes the Company’s combined results of operations for the years ended December 31, 2010 and 2009 as though the acquisition of Three Logan Square was completed on January 1, 2009 . The supplemental pro forma operating data is not necessarily indicative of what the actual results of operations would have been assuming the transaction had been completed as set forth above, nor do they purport to represent the Company’s results of operations for future periods (in thousands except for per share amounts).

	December 31, — 2010		2009
	(unaudited)
Pro forma revenues	$ 582,642		$ 604,440
Pro forma income (loss) from continuing operations	(29,000	)	7,890
Pro forma net income (loss) available to common shareholders	(24,940	)	2,306
Earnings per common share from continuing operations:
Basic — as reported	$ (0.29	)	$ (0.04	)
Basic — as pro forma	$ (0.28	)	$ —
Diluted — as reported	$ (0.29	)	$ (0.04	)
Diluted — as pro forma	$ (0.28	)	$ —
Earnings per common share:
Basic — as reported	$ (0.19	)	$ —
Basic — as pro forma	$ (0.19	)	$ 0.02
Diluted — as reported	$ (0.19	)	$ —
Diluted — as pro forma	$ (0.19	)	$ 0.02

On December 29, 2010, the Company acquired a 12 acre parcel of land in Gibbsboro, New Jersey through the foreclosure of a note receivable amounting to $2.8 million under which the said property was encumbered. The Company paid transaction related costs of $0.3 million which was capitalized as part of land inventory in the Company’s consolidated balance sheets. The parcel of land is held for future development.

Dispositions

On December 23, 2010, the Company sold four office properties (One and Two Greentree Centre, 8000 Lincoln Drive, and Lake Center IV) containing a total of 243,195 net rentable square feet in Marlton, New Jersey for an aggregate sales price of $20.9 million . These properties were 76.1% occupied at the date of sale.

On November 22, 2010, the Company sold Spyglass Point, a 58,576 net rentable square feet office property located in Austin, Texas for a sales price of $13.5 million . This property was fully occupied at the date of sale.

On September 20, 2010, the Company sold 630 Clark Avenue, a 50,000 net rentable square feet office property located in King of Prussia, Pennsylvania for a sales price of $3.6 million . This property was fully occupied at the date of sale.

On August 18, 2010, the Company sold 479 Thomas Jones Way, a 49,264 net rentable square feet office property located in Exton, Pennsylvania, for a sales price of $3.8 million . This property was 63.0% occupied at the date of sale.

On January 14, 2010, the Company sold Westmoreland Plaza, a 121,815 net rentable square feet office property located in Richmond, Virginia, for a sales price of $10.8 million . This property was vacant at the date of sale.

All sales presented above are included within discontinued operations (see Note 10).

INVESTMENT IN UNCONSOLIDATED VENTURES

As of December 31, 2011 , the Company had an aggregate investment of approximately $115.8 million in its 18 actively operating unconsolidated Real Estate Ventures. The Company formed these ventures with unaffiliated third parties, or acquired interests in them, to develop or manage office properties or to acquire land in anticipation of possible development of office properties. As of December 31, 2011 , 15 of the Real Estate Ventures own 52 office buildings that contain an aggregate of approximately 6.7 million net rentable square feet, two Real Estate Ventures own four acres of undeveloped land and one Real Estate Venture developed a hotel property that contains 137 rooms in Conshohocken, PA.

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The Company accounts for its unconsolidated interests in its Real Estate Ventures using the equity method. The Company’s unconsolidated interests range from 20% to 65% , subject to specified priority allocations in certain of the Real Estate Ventures.

The amounts reflected in the following tables (except for the Company’s share of equity and income) are based on the historical financial information of the individual Real Estate Ventures. One of the Real Estate Ventures, acquired in connection with the Prentiss Properties Trust merger in 2006, had a negative equity balance on a historical cost basis as a result of historical depreciation and distribution of excess financing proceeds. The Company reflected its acquisition of this Real Estate Venture interest at its relative fair value as of the date of the merger. The difference between allocated cost and the underlying equity in the net assets of the investee is accounted for as if the entity were consolidated (i.e., allocated to the Company’s relative share of assets and liabilities with an adjustment to recognize equity in earnings for the appropriate depreciation/amortization). The Company does not record operating losses of the Real Estate Ventures in excess of its investment balance unless the Company is liable for the obligations of the Real Estate Venture or is otherwise committed to provide financial support to the Real Estate Venture.

The Company’s investment in Real Estate Ventures as of December 31, 2011 and the Company’s share of the Real Estate Ventures’ income (loss) for the year ended December 31, 2011 was as follows (in thousands):

	Ownership Percentage (a)	Carrying Amount		Company’s Share of 2011 Real Estate Venture Income (Loss)		Real Estate Venture Debt at 100%	Current Interest Rate	Debt Maturity
Broadmoor Austin Associates	50 %	$ 66,150		$ 197		$ 66,810	7.04 %	Apr-2023
Brandywine-AI Venture LLC (b)	50 %	24,670		(278	)	68,000	(b)	(b)
Macquarie BDN Christina LLC	20 %	6,168		875		60,000	4.50 %	June-2016
One Commerce Square (c)	25 %	5,100		242		128,529	5.67 %	Dec-15
Brandywine 1919 Ventures (d)	50 %	4,882		—		—	N/A	N/A
Two Commerce Square (c)	25 %	3,415		224		107,112	6.30 %	May-13
1000 Chesterbrook Blvd.	50 %	1,745		245		26,000	4.75 %	Dec-21
Four Tower Bridge (e)	65 %	1,360		702		10,870	5.20 %	Feb-21
G&I Interchange Office LLC (DRA — N. PA) (f)	20 %	1,239		76		181,967	5.78 %	Jan-15
Residence Inn Tower Bridge	50 %	481		433		14,261	5.63 %	Feb-16
PJP VII	25 %	472		190		8,072	L+1.55%	Nov-13
PJP V	25 %	361		116		5,789	6.47 %	Aug-19
PJP II	30 %	300		138		4,263	6.12 %	Nov-23
Six Tower Bridge (e)	63 %	201		126		12,599	7.79 %	Aug-12
Two Tower Bridge	35 %	134		(364	)	13,482	(g)	(g)
Seven Tower Bridge	20 %	105		—		11,182	(h)	(h)
PJP VI	25 %	31		67		8,834	6.08 %	Apr-23
Eight Tower Bridge	3.4 %	—		583		—
Coppell Associates (e)	50 %	(1,007	)	(139	)	18,060	(i)	(i)
Five Tower Bridge		—		60
Invesco, L.P.		—		282
		$ 115,807		$ 3,775		$ 745,830

(a) Ownership percentage represents the Company’s entitlement to residual distributions after payments of priority returns, where applicable.

(b) See Note 3 for related discussion about the Brandywine-AI Venture, LLC formation.

(c) During November, 2010, the Company acquired a 25% interest in two partnerships which own One and Two Commerce Square buildings in Philadelphia, PA. The other partner holds the remaining 75% interest in each of the two partnerships. In accordance with the accounting guidance for joint ventures, the Company is currently recognizing its preferred return from the real estate ventures as income on its invested capital. After the other partner has recognized the losses equal to its invested capital, the Company will begin to recognize its share from the results of the real estate ventures in proportion to its ownership interests.

(d) See Note 3 for related discussion about the Brandywine 1919 Market Ventures formation.

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(e) As a result of the adoption of the new accounting standard for the consolidation of variable interest entities, the Company deconsolidated these three real estate ventures as of January 1, 2010.

(f) Proceeds received by the Company from the sale of an 80% ownership stake in the properties exceeded the historical cost of those properties. Accordingly, no investment in the real estate venture was reflected on the balance sheet at period end.

(g) Consists of a $10.1 million fixed rate mortgage with a 5.72% interest rate and May 2013 maturity date; also includes $3.4 million municipal and state borrowings with nominal interest rates (0 — 1%) and maturity dates from 3 to 10 years.

(h) Comprised of two fixed rate mortgages: $7.0 million and $1.0 million . Both mature in February 2013 and accrue interest at a fixed rate of 4% through February 2012, and 5% through February 2013. The total loan amount of $11.2 million as presented above also includes a 3% fixed rate loan (interest only through maturity) with a balance of $1.2 million as of December 31, 2011 . This loan can be increased up to $1.3 million through its maturity date of September 2025. The remaining $2.0 million of the total amount features a 4% fixed rate with interest only through its maturity date of February 2014.

(i) Comprised of two fixed rate mortgages: a senior fixed rate note of $16.4 million at 5.75% that matures in March 2016 and a junior fixed rate note of $1.6 million at 6.89% that matures in December 2013; 5.89% is the blended rate.

The following is a summary of the financial position of the unconsolidated Real Estate Ventures in which the Company had investment interests as of December 31, 2011 and 2010 (in thousands):

	December 31, — 2011	2010
Net property	$ 846,643	$ 804,705
Other assets	110,520	105,576
Other Liabilities	48,798	44,509
Debt	745,830	748,387
Equity	162,535	117,385
Company’s share of equity (Company’s basis)	115,807	84,372

The following is a summary of results of operations of the unconsolidated Real Estate Ventures in which the Company had interests as of December 31, 2011 , 2010 and 2009 (in thousands):

	Years ended December 31, — 2011 (a)	2010 (a)	2009
Revenue	$ 145,867	$ 118,923	$ 105,236
Operating expenses	63,715	44,942	38,691
Interest expense, net	42,032	37,505	30,858
Depreciation and amortization	39,172	32,703	36,700
Net income	948	3,773	(1,012	)
Company’s share of income (Company’s basis)	3,775	5,305	4,069

(a) - Includes the three real estate ventures that were deconsolidated upon the adoption of the accounting standard for the consolidation of VIEs on January 1, 2010 .

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As of December 31, 2011 , the aggregate principal payments of recourse and non-recourse debt payable to third-parties are as follows (in thousands):

2011	$
2012	143,705
2013	13,809
2014	306,051
2015	97,215
Thereafter	160,822
	$ 745,830

As of December 31, 2011 , the Company had guaranteed repayment of approximately $0.7 million of loans on behalf of a certain Real Estate Venture. The Company also provides customary environmental indemnities in connection with construction and permanent financing both for its own account and on behalf of its Real Estate Ventures.

DEFERRED COSTS

As of December 31, 2011 and 2010 , the Company’s deferred costs were comprised of the following (in thousands):

	December 31, 2011 — Total Cost	Accumulated Amortization		Deferred Costs, net
Leasing Costs	$ 140,772	$ (50,990	)	$ 89,782
Financing Costs	38,929	(13,349	)	25,580
Total	$ 179,701	$ (64,339	)	$ 115,362

	December 31, 2010 — Total Cost	Accumulated Amortization		Deferred Costs, net
Leasing Costs	$ 123,724	$ (43,930	)	$ 79,794
Financing Costs	37,257	(10,934	)	26,323
Total	$ 160,981	$ (54,864	)	$ 106,117

During 2011 , 2010 and 2009 , the Company capitalized internal direct leasing costs of $6.6 million , $6.2 million and $5.3 million , respectively, in accordance with the accounting standard for the capitalization of leasing costs.

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INTANGIBLE ASSETS AND LIABILITIES

As of December 31, 2011 and 2010 , the Company’s intangible assets/liabilities were comprised of the following (in thousands):

	December 31, 2011 — Total Cost	Accumulated Amortization		Intangibles, net
In-place lease value	$ 91,426	$ (55,498	)	$ 35,928
Tenant relationship value	72,813	(45,114	)	27,699
Above market leases acquired	12,744	(5,856	)	6,888
Total	$ 176,983	$ (106,468	)	$ 70,515
Below market leases acquired	$ 75,685	$ (40,579	)	$ 35,106

	December 31, 2010 — Total Cost	Accumulated Amortization		Intangibles, net
In-place lease value	$ 108,456	$ (63,010	)	$ 45,446
Tenant relationship value	95,385	(52,113	)	43,272
Above market leases acquired	18,319	(9,575	)	8,744
Total	$ 222,160	$ (124,698	)	$ 97,462
Below market leases acquired	$ 67,198	$ (37,965	)	$ 29,233

For the years ended December 31, 2011 , 2010 , and 2009 , the Company wrote off through the acceleration of amortization approximately $7.4 million , $1.5 million and $2.4 million , respectively, of intangible assets as a result of tenant move-outs prior to the end of the associated lease term. For the year ended December 31, 2011 , the Company accelerated amortization of approximately $0.2 million of intangible liabilities as a result of tenant move-outs. For the year ended December 31, 2010 , the Company accelerated amortization of a nominal amount of intangible liabilities as a result of tenant move-outs. For the year ended December 31, 2009 , the Company accelerated amortization of approximately $0.4 million of intangible liabilities as a result of tenant move-outs.

As of December 31, 2011 , the Company’s annual amortization for its intangible assets/liabilities is as follows (in thousands, assumes no early terminations):

	Assets	Liabilities
2012	$ 20,457	$ 6,826
2013	12,457	6,312
2014	9,606	4,745
2015	7,207	2,597
2016	4,565	1,704
Thereafter	16,223	12,922
Total	$ 70,515	$ 35,106

DEBT OBLIGATIONS

The following table sets forth information regarding the Company’s consolidated debt obligations outstanding at December 31, 2011 and 2010 (in thousands):

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Property / Location	December 31, 2011		December 31, 2010			Maturity Date
MORTGAGE DEBT:
Arboretum I, II, III & V	$ —		$ 20,386	7.59 %	(a)	Jul-11
Midlantic Drive/Lenox Drive/DCC I	—		56,514	8.05 %	(b)	Oct-11
Research Office Center	—		39,145	5.30 %	(c), (d)	Oct-11
Concord Airport Plaza	—		34,494	5.55 %	(d), (e)	Jan-12
Newtown Square/Berwyn Park/Libertyview	56,538		58,102	7.25 %		May-13
Southpoint III	1,887		2,597	7.75 %		Apr-14
Tysons Corner	94,882		96,507	5.36 %	(d)	Aug-15
Two Logan Square	89,800		89,800	7.57 %		Apr-16
One Logan Square	—		60,000	4.50 %	(f)	Jul-16
Fairview Eleven Tower	22,000		—	4.25 %		Jan-17
IRS Philadelphia Campus	202,905		208,366	7.00 %		Sep-30
Cira South Garage	44,379		46,335	7.12 %		Sep-30
Principal balance outstanding	512,391		712,246
Plus: unamortized fixed-rate debt premiums (discounts), net	(1,330	)	(457	)
Total mortgage indebtedness	$ 511,061		$ 711,789
UNSECURED DEBT:
$345.0M 3.875% Guaranteed Exchangeable Notes due 2026	—		59,835	5.50 %	(g)	Oct-11
Bank Term Loan	37,500		183,000	LIBOR+0.80%	(h)	Jun-12
Credit Facility	275,500		183,000	LIBOR+0.725%	(h)	Jun-12
$300.0M 5.750% Guaranteed Notes due 2012	151,491		175,200	5.73 %		Apr-12
$250.0M 5.400% Guaranteed Notes due 2014	242,681		242,681	5.53 %		Nov-14
$250.0M 7.500% Guaranteed Notes due 2015	227,329		250,000	7.77 %		May-15
$250.0M 6.000% Guaranteed Notes due 2016	250,000		250,000	5.95 %		Apr-16
$300.0M 5.700% Guaranteed Notes due 2017	300,000		300,000	5.68 %		May-17
$325.0M 4.950% Guaranteed Notes due 2018	325,000		—	5.14 %		Apr-18
Indenture IA (Preferred Trust I)	27,062		27,062	2.75 %		Mar-35
Indenture IB (Preferred Trust I)	25,774		25,774	3.30 %		Apr-35
Indenture II (Preferred Trust II)	25,774		25,774	LIBOR+1.25%		Jul-35
Principal balance outstanding	1,888,111		1,722,326
Less: unamortized exchangeable debt discount	—		(906	)
unamortized fixed-rate debt discounts, net	(5,177	)	(2,763	)
Total unsecured indebtedness	$ 1,882,934		$ 1,718,657
Total Debt Obligations	$ 2,393,995		$ 2,430,446

(a) On April 1, 2011 , the Company prepaid the remaining balance of the loan without penalty.

(b) On June 3, 2011 , the Company prepaid the remaining balance of the loan without penalty.

(c) On June 30, 2011 , the Company prepaid the remaining balance of the loan without penalty. The unamortized fixed-rate debt premium of $0.3 million related to this loan was included as part of the gain (loss) on early extinguishment of debt in the Company's consolidated

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statement of operations during the current year.

(d) These loans were assumed upon acquisition of the related properties. The interest rates reflect the market rate at the time of acquisition.

(e) On September 1, 2011 , the Company prepaid the remaining balance of the loan without penalty. The unamortized fixed-rate debt premium of $0.2 million related to this loan was included as part of the gain (loss) on early extinguishment of debt in the Company's consolidated statement of operations during the year.

(f) This mortgage was subject to an interest rate floor of 4.50% on a monthly basis. On July 11, 2011 , the Company prepaid the balance of the loan without penalty.

(g) On October 20, 2011 , holders representing $59.5 million of the outstanding Exchangeable Notes exercised their right to cause the Company to redeem their notes at par plus accrued and unpaid interest leaving an outstanding balance of $0.4 million . On December 8, 2011, the Company redeemed the remaining balance of the Exchangeable Notes pursuant to its right under the indenture agreement (see related discussion below).

(h) On March 31, 2011 , the maturity dates of the Bank Term Loan and the Credit Facility were extended to June 29, 2012 from June 29, 2011 . On June 29, 2011 , the Company paid a total extension fee amounting to $1.2 million which is equal to 15 basis points of the outstanding principal balance of the Bank Term Loan and of the committed amount under the Credit Facility . The extension of the maturity dates was at the Company's option under the Bank Term Loan and the Credit Facility agreements. There were no changes in the terms and conditions of the loan agreements as a result of the maturity date extensions. On December 15, 2011 , the Company entered into binding agreements for lender commitments related a new $600.0 million four -year unsecured credit facility (the "New Credit Facility") and three unsecured term loans in the same aggregate amount of $600.0 million (collectively, the “New Term Loans”), consisting of a $150.0 million three-year loan, a $250.0 million four-year loan and a $200.0 million seven-year loan. Please see below for a related discussion regarding the New Credit Facility and Term Loans.

During 2011 , 2010 and 2009 , the Company’s weighted-average effective interest rate on its mortgage notes payable was 6.72% , 6.59% and 6.45% , respectively. As of December 31, 2011 and 2010 , the net carrying value of the Company’s Properties that are encumbered by mortgage indebtedness was $678.0 million and $989.8 million , respectively.

During the year ended December 31, 2011 , the Company repurchased $106.2 million of its outstanding unsecured Notes in a series of transactions which are summarized in the table below (excluding accrued interest, in thousands):

Notes	Repurchase Amount	Principal	Loss	Deferred Financing Amortization
2011 3.875% Notes	$ 59,835	$ 59,835	$ —	$ —
2012 5.750% Notes	24,749	23,709	868	32
2015 7.500% Notes	25,140	22,671	2,396	120
	$ 109,724	$ 106,215	$ 3,264	$ 152

The Parent Company unconditionally guarantees the unsecured debt obligations of the Operating Partnership (or is a co-borrower with the Operating Partnership) but does not, by itself incur indebtedness.

The Company utilizes its unsecured revolving credit facility (the Credit Facility) borrowings for general business purposes, including the acquisition, development and redevelopment of properties and the repayment of other debt. The maturity date of the Credit Facility in place at December 31, 2011 was June 29, 2012. The per annum variable interest rate on the outstanding balances was LIBOR plus 0.725% . The interest rate and facility fee are subject to adjustment upon a change in the Company’s unsecured debt ratings. As of December 31, 2011 , the Company had $275.5 million of borrowings, and $2.5 million in letters of credit outstanding, leaving $322.0 million of unused availability under the Credit Facility. During the years ended December 31, 2011 and 2010 , the weighted-average interest rate on Credit Facility borrowings was 0.99% and 1.03% , respectively. As of December 31, 2011 and 2010 , the weighted average interest rate on the Credit Facility was 1.01% and 1.02% , respectively.

The Credit Facility requires the maintenance of ratios related to minimum net worth, debt-to-total capitalization and fixed charge coverage and includes non-financial covenants. The Company was in compliance with all financial covenants as of December 31, 2011 .

The Company entered into binding agreements for lender commitments related to a New Credit Facility and New Term Loans as mentioned above. The Company closed on the New Credit Facility and Term Loans on February 1, 2012 and used the initial advances under the New Term Loans to repay all balances outstanding under, and concurrently terminate, its existing Credit Facility

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and the Bank Term Loan, both of which were scheduled to mature on June 29, 2012 .

The Company has the option to increase the amounts available to be advanced under the New Credit Facility, the $150.0 million three-year term loan, and the $250.0 million four-year term loan by an aggregate of $200.0 million , subject to customary conditions and limitations, by obtaining additional commitments from the current lenders and other financial institutions. The Company also has the option to extend the maturity dates of each of the New Credit Facility, the $150.0 million three-year term loan and the $250.0 million four-year term loan by one year , subject to payment of an extension fee and other customary conditions and limitations. The $150.0 million three-year term and the $250.0 million four-year term loans can be prepaid by the Company at any time without penalty. The $200.0 million seven-year term loan is subject to a declining prepayment penalty ranging from 3.00% a year after closing, 2.00% after two years, 1.00% after three years and without penalty thereafter.

The spread to LIBOR for LIBOR-based loans under the New Credit Facility and New Term Loans will depend on the Company's unsecured senior debt credit rating. Based on the Company's current credit rating, the spread for such loans will be 150 , 175 , 175 and 190 basis points under the New Credit Facility, the $150.0 million three-year term loan, the $250.0 million four-year term loan and the $200.0 million seven-year term loan, respectively. At the Company's option, loans under the New Credit Facility and New Term Loans may also bear interest at a per annum floating rate equal to the higher of the prime rate or the federal funds rate plus 0.50% per annum. The New Credit Facility contains a competitive bid option that allows banks that are part of the lender consortium to bid to make loans to the Company at a reduced rate. The Company executed hedging transactions that fix the rate on the $200.0 million seven-year term loan at a 3.623% average for its full term, the rate on $300.0 million of notional principal for the other loans at rates in a range of 2.470% to 2.910% for periods of three to five years. All hedges commenced on February 1, 2012 and the rates are inclusive of the LIBOR spread based on the current investment grade rating. See Note 9 for details of the interest rate swaps entered into as of December 31, 2011.

The New Credit Facility and New Term Loans contain financial and operating covenants and restrictions.

The Company accounted for its outstanding 3.875% Guaranteed Exchangeable Notes in accordance with the accounting standard for convertible debt instruments. The accounting standard requires the initial proceeds from convertible debt that may be settled in cash to be bifurcated between a liability component and an equity component. The accounting standard requires the initial proceeds from the Company’s issuance of the 3.875% Guaranteed Exchangeable Notes to be allocated between a liability component and an equity component in a manner that reflects interest expense at the interest rate of a similar nonconvertible debt that could have been issued by the Company at such time. This is accomplished through the creation of a discount on the debt that would be accreted using the effective interest method as additional non-cash interest expense over the period the debt is expected to remain outstanding (i.e. through the first optional redemption date).

On December 8, 2011, the Company redeemed the remaining balance of the 3.875% Exchangeable Notes pursuant to its right under the indenture agreement. The principal amount outstanding of the 3.875% Guaranteed Exchangeable Notes was $59.8 million at December 31, 2010 . The carrying amount of the equity component is $24.4 million and is reflected within additional paid-in capital in the Company’s consolidated balance sheets. The debt discount was fully amortized through October 15, 2011 . The unamortized debt discount was $0.9 million at December 31, 2010 . The effective interest rate at December 31, 2010 was 5.5% . The Company recognized contractual coupon interest of $1.9 million and $3.2 million for the years ended December 31, 2011 and 2010 , respectively. In addition, the Company recognized interest on amortization of debt discount of $0.9 million and $1.6 million during the years ended December 31, 2011 and 2010 , respectively. There were no debt discount write-offs resulting from debt repurchases for the year ended December 31, 2011 . Debt discount write-offs resulting from debt repurchases amounted to $2.0 million for the years ended December 31, 2010 .

On August 26, 2010, the Company received $254.0 million of gross proceeds from a $256.5 million forward financing commitment it obtained on June 29, 2009. The Company paid a $17.7 million commitment fee in connection with this commitment. The loan proceeds, together with the commitment fee, had been escrowed with an institutional trustee pending the completion of the development of the IRS Philadelphia Campus and the Cira South Garage as well as the commencement of the leases at these facilities. The financing consists of two separate loans of $209.7 million secured by the IRS Philadelphia Campus and $46.8 million secured by the Cira South Garage. The lender held back $2.5 million of the loan proceeds pending the completion of certain conditions related to the IRS Philadelphia Campus and Cira South Garage. As of December 31, 2011 , the Company has received $2.1 million of the total amounts held back. The loans are non-recourse and are secured by the IRS Philadelphia Campus and Cira South Garage, respectively. The loans bear interest of 5.93% per annum with interest only through September 10, 2010 and thereafter require principal and interest monthly payments through its maturity in September 2030. As of December 31, 2011 , total financing costs related to this transaction amounted to $19.9 million which is included as part of the deferred costs in the Company’s consolidated balance sheet and will be amortized over the 20 year term of the loans using the effective interest rate method. The total financing costs included the commitment fee which was reduced to $16.0 million after the receipt of a refund resulting from the overpayment made on the commitment fee of $1.7 million . Other related transaction costs included as part of total financing costs amounted to $3.8 million . The Company used the loan proceeds to reduce borrowings under its Credit Facility and for general corporate purposes.

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As of December 31, 2011 , the Company’s aggregate scheduled principal payments of debt obligations are as follows (in thousands):

2012	$
2013	66,806
2014	254,787
2015	327,225
2016	347,065
Thereafter	927,730
Total principal payments	2,400,502
Net unamortized premiums/(discounts)	(6,507	)
Outstanding indebtedness	$ 2,393,995

FAIR VALUE OF FINANCIAL INSTRUMENTS

The following fair value disclosure was determined by the Company using available market information and discounted cash flow analyses as of December 31, 2011 and 2010 , respectively. The discount rate used in calculating fair value is the sum of the current risk free rate and the risk premium on the date measurement of the instruments or obligations. Considerable judgment is necessary to interpret market data and to develop the related estimates of fair value. Accordingly, the estimates presented are not necessarily indicative of the amounts that the Company could realize upon disposition. The use of different estimation methodologies may have a material effect on the estimated fair value amounts. The Company believes that the carrying amounts reflected in the Consolidated Balance Sheets at December 31, 2011 and 2010 approximate the fair values for cash and cash equivalents, accounts receivable, other assets, accounts payable and accrued expenses.

The following are financial instruments for which the Company estimates of fair value differ from the carrying amounts (in thousands):

	December 31, 2011 — Carrying Amount		Fair Value	December 31, 2010 — Carrying Amount		Fair Value
Mortgage payable, net of premiums	$ 512,391		$ 545,784	$ 712,246		$ 726,348
Unsecured notes payable, net of discounts	$ 1,496,501		$ 1,555,633	$ 1,277,716		$ 1,338,743
Variable Rate Debt Instruments	$ 391,610		$ 380,786	$ 444,610		$ 432,556
Notes Receivable	$ 31,157	(a)	$ 32,756	$ 31,216	(a)	$ 28,921

(a) For purposes of this disclosure, one of the notes is presented gross of the deferred gain of $12.9 million arising from the sale of the two Trenton properties in 2009 accounted for under the accounting standard for installment sales.

RISK MANAGEMENT AND USE OF FINANCIAL INSTRUMENTS

Risk Management

In the course of its on-going business operations, the Company encounters economic risk. There are three main components of economic risk: interest rate risk, credit risk and market risk. The Company is subject to interest rate risk on its interest-bearing liabilities. Credit risk is primarily the risk of inability or unwillingness of tenants to make contractually required payments and counterparties on derivatives not fulfilling their obligations. Market risk is the risk of declines in the value of properties due to changes in rental rates, interest rates or other market factors affecting the valuation of properties held by the Company.

Risks and Uncertainties

Significantly challenging and sluggish economic conditions have reduced the volume of real estate transactions and created credit stresses on many businesses. Vacancy rates may increase through 2012 and possibly beyond as the current economic climate negatively impacts tenants in the Properties. The current financial markets also have an adverse effect on the Company’s other counter parties such as the counter parties in its derivative contracts.

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The Company expects that the impact of the current state of the economy, including high unemployment and the unprecedented volatility in the financial and credit markets, will continue to have a dampening effect on the fundamentals of its business, including increases in past due accounts, tenant defaults, lower occupancy and reduced effective rents. These conditions would negatively affect the Company’s future net income and cash flows and could have a material adverse effect on its financial condition.

The Company’s Credit Facility, Bank Term Loan and the indenture governing the unsecured public debt securities (Note 7) contain restrictions, requirements and other limitations on the ability to incur indebtedness, including total debt to asset ratios, secured debt to total asset ratios, debt service coverage ratios and minimum ratios of unencumbered assets to unsecured debt which it must maintain. The ability to borrow under the Credit Facility is subject to compliance with such financial and other covenants. In the event that the Company fails to satisfy these covenants, it would be in default under the Credit Facility, the Bank Term Loan and the indenture and may be required to repay such debt with capital from other sources. Under such circumstances, other sources of capital may not be available, or may be available only on unattractive terms.

Availability of borrowings under the Credit Facility is subject to a traditional material adverse effect clause. Each time the Company borrows it must represent to the lenders that there have been no events of a nature which would have a material adverse effect on the business, assets, operations, condition (financial or otherwise) or prospects of the Company taken as a whole or which could negatively effect the ability of the Company to perform its obligations under the Credit Facility. While the Company believes that there are currently no material adverse effect events, the Company is operating in unprecedented economic times and it is possible that such event could arise which would limit the Company’s borrowings under the Credit Facility. If an event occurs which is considered to have a material adverse effect, the lenders could consider the Company in default under the terms of the Credit Facility and the borrowings under the Credit Facility would become due and payable. If the Company is unable to obtain a waiver, this would have a material adverse effect on the Company’s financial position and results of operations.

The Company was in compliance with all financial covenants as of December 31, 2011 . Management continuously monitors the Company’s compliance with and anticipated compliance with the covenants. Certain of the covenants restrict management’s ability to obtain alternative sources of capital. While the Company currently believes it will remain in compliance with its covenants, in the event of a continued slow-down and continued crisis in the credit markets, the Company may not be able to remain in compliance with such covenants and if the lender would not provide a waiver, it could result in an event of default.

Use of Derivative Financial Instruments

The Company’s use of derivative instruments is limited to the utilization of interest rate agreements or other instruments to manage interest rate risk exposures and not for speculative purposes. The principal objective of such arrangements is to minimize the risks and/or costs associated with the Company’s operating and financial structure, as well as to hedge specific transactions. The counterparties to these arrangements are major financial institutions with which the Company and its affiliates may also have other financial relationships. The Company is potentially exposed to credit loss in the event of non-performance by these counterparties. However, because of the high credit ratings of the counterparties, the Company does not anticipate that any of the counterparties will fail to meet these obligations as they come due. The Company does not hedge credit or property value market risks through derivative financial instruments.

The Company formally assesses, both at inception of the hedge and on an on-going basis, whether each derivative is highly-effective in offsetting changes in cash flows of the hedged item. If management determines that a derivative is not highly-effective as a hedge or if a derivative ceases to be a highly-effective hedge, the Company will discontinue hedge accounting prospectively. The related ineffectiveness would be charged to the consolidated statement of operations.

The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash receipts (or payments) and the discounted expected variable cash payments (or receipts). The variable cash payments (or receipts) are based on an expectation of future interest rates (forward curves) derived from observable market interest rate curves.

To comply with the provisions of the accounting standard for fair value measurements and disclosures, the Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees.

The following table summarizes the terms and fair values of the Company's derivative financial instruments as of December 31, 2011. The Company has no existing derivative financial instruments at December 31, 2010. The notional amounts provide an

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indication of the extent of the Company's involvement in these instruments at that time, but do not represent exposure to credit, interest rate or market risks (amounts presented in thousands).

Hedge Product	Hedge Type	Designation		Notional Amount	Strike	Trade Date	Maturity Date	Fair value
Swap	Interest Rate	Cash Flow	(a)	$ 200,000	3.623 %	December 6-13, 2011	February 1, 2019	$ 2,820
Swap	Interest Rate	Cash Flow	(a)	127,000	2.702 %	December 9-13, 2011	February 1, 2016	340
Swap	Interest Rate	Cash Flow	(a)	50,000	2.470 %	December 13, 2011	February 1, 2015	65
Swap	Interest Rate	Cash Flow	(a)	23,000	2.513 %	December 7-12, 2011	May 1, 2015	27
Swap	Interest Rate	Cash Flow	(a)	27,062	2.750 %	December 21, 2011	September 30, 2017	244
Swap	Interest Rate	Cash Flow	(a)	25,774	3.300 %	December 22, 2011	January 30, 2021	390
				$ 452,836				$ 3,886

(a) Hedging unsecured variable rate debt.

On March 31, 2011 , in anticipation of the offering of $325.0 million of 4.95% unsecured guaranteed notes due April 15, 2018 , the Company also entered into seven intra-day treasury lock agreements. The treasury lock agreements were designated as cash flow hedges on interest rate risk and qualified for hedge accounting. The total notional amount of the treasury lock agreements was $230.0 million with an expiration of seven years at treasury rates of 2.891% , 2.873% , and 2.858% and a fair value of $0.6 million at March 31, 2011 . The agreements were settled on the day we completed the debt offering at a total cost of $0.6 million . This cost was recorded as a component of accumulated other comprehensive income in the accompanying consolidated balance sheet and will be amortized over the term of the note.

Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, in connection with the Company's interest swaps as of December 31, 2011 , the intra-day treasury lock agreement that the Company entered into and the interest swaps which matured on October 18, 2010 , the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

The fair values of the hedges as of December 31, 2011 were included in other liabilities and accumulated other comprehensive income in the Company's consolidated balance sheet , except for the $1.1 million fair value adjustment of the hedges charged as an expense to the consolidated statements of operations during the year ended December 31, 2009 , relating to two of its interest rate swaps which were both cash settled in December 2009. The hedging relationship with these swaps ceased upon the Company’s issuance of its unsecured notes on September 25, 2009. Accordingly, changes in the fair value of these interest rate swaps were charged to the consolidated statements of operations until they were cash settled. The Company also recognized a gain of $0.1 million from the ineffectiveness of the hedges during the year ended December 31, 2009 prior to the termination of the hedging relationship.

Concentration of Credit Risk

Concentrations of credit risk arise when a number of tenants related to the Company’s investments or rental operations are engaged in similar business activities, or are located in the same geographic region, or have similar economic features that would cause their inability to meet contractual obligations, including those to the Company, to be similarly affected. The Company regularly monitors its tenant base to assess potential concentrations of credit risk. Management believes the current credit risk portfolio is reasonably well diversified and does not contain any unusual concentration of credit risk. No tenant accounted for 10% or more of the Company’s rents during 2011 , 2010 and 2009 . Recent developments in the general economy and the global credit markets have had a significant adverse effect on companies in numerous industries. The Company has tenants concentrated in various industries that may be experiencing adverse effects from the current economic conditions and the Company could be adversely affected if such tenants go into default on their leases.

DISCONTINUED OPERATIONS

For the years ended December 31, 2011 , 2010 and 2009 , income from discontinued operations relates to an aggregate of 19 properties containing approximately 1.6 million net rentable square feet that the Company has sold since January 1, 2009 .

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The following table summarizes revenue and expense information for the properties sold which qualify for discontinued operations reporting since January 1, 2009 (in thousands):

	Years ended December 31, — 2011		2010	2009
Revenue:
Rents	$ 3,779		$ 9,363	$ 19,095
Tenant reimbursements	1,198		3,678	8,453
Termination fees	33		190	—
Other	(50	)	70	238
Total revenue	4,960		13,301	27,786
Expenses:
Property operating expenses	1,717		4,641	9,884
Real estate taxes	559		1,816	3,769
Depreciation and amortization	1,431		4,185	7,173
Total operating expenses	3,707		10,642	20,826
Income from discontinued operations before gain on sale of interests in real estate	1,253		2,659	6,960
Net gain on disposition of discontinued operations	7,264		11,011	1,241
Provision for impairment	—		—	(3,700	)
Income from discontinued operations	$ 8,517		$ 13,670	$ 4,501

Discontinued operations have not been segregated in the consolidated statements of cash flows. Therefore, amounts for certain captions will not agree with respective data in the consolidated statements of operations.

NON-CONTROLLING INTERESTS IN THE PARENT COMPANY

Non-controlling interests in the Parent Company’s financial statements relate to redeemable common limited partnership interests in the Operating Partnership held by parties other than the Parent Company and interests held by third party partners in the previously consolidated real estate ventures.

Operating Partnership

As of December 31, 2011 and 2010 , the aggregate book value of the non-controlling interest associated with the redeemable common limited partnership interests in the accompanying consolidated balance sheet was $33.1 million and $128.3 million , respectively. The Parent Company believes that the aggregate settlement value of these interests (based on the number of units outstanding and the closing price of the common shares on the balance sheet date) was approximately $25.6 million and $115.4 million , respectively.

BENEFICIARIES’ EQUITY OF THE PARENT COMPANY

Earnings per Share (EPS)

The following table details the number of shares and net income used to calculate basic and diluted earnings per share (in thousands, except share and per share amounts; results may not add due to rounding):

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	Years ended December 31,
	2011				2010				2009
	Basic		Diluted		Basic		Diluted		Basic		Diluted
Numerator
Income (loss) from continuing operations	$ (13,232	)	$ (13,232	)	$ (31,276	)	$ (31,276	)	$ 3,588		$ 3,588
Net (loss) income from continuing operations attributable to non-controlling interests	548		548		820		820		58		58
Amount allocable to unvested restricted shareholders	(505	)	(505	)	(512	)	(512	)	(279	)	(279	)
Preferred share dividends	(7,992	)	(7,992	)	(7,992	)	(7,992	)	(7,992	)	(7,992	)
Loss from continuing operations available to common shareholders	(21,181	)	(21,181	)	(38,960	)	(38,960	)	(4,625	)	(4,625	)
Income from discontinued operations	8,517		8,517		13,670		13,670		4,501		4,501
Discontinued operations attributable to non-controlling interests	(332	)	(332	)	(288	)	(288	)	(121	)	(121	)
Discontinued operations attributable to common shareholders	8,185		8,185		13,382		13,382		4,380		4,380
Net loss available to common shareholders	$ (12,996	)	$ (12,996	)	$ (25,578	)	$ (25,578	)	$ (245	)	$ (245	)
Denominator
Weighted-average shares outstanding	135,444,424		135,444,424		131,743,275		131,743,275		111,898,045		111,898,045
Contingent securities/Stock based compensation	—		—		—		—		—		1,353,246
Total weighted-average shares outstanding	135,444,424		135,444,424		131,743,275		131,743,275		111,898,045		113,251,291
Earnings (loss) per Common Share:
Loss from continuing operations attributable to common shareholders	$ (0.16	)	$ (0.16	)	$ (0.29	)	$ (0.29	)	$ (0.04	)	$ (0.04	)
Discontinued operations attributable to common shareholders	0.06		0.06		0.10		0.10		0.04		0.04
Net loss attributable to common shareholders	$ (0.10	)	$ (0.10	)	$ (0.19	)	$ (0.19	)	$ —		$ —

Redeemable limited partnership units totaling 2,698,647 in 2011 , 9,902,752 in 2010 , and 2,809,108 in 2009 were excluded from the earnings per share computations because their effect would have been antidilutive.

The contingent securities/stock based compensation impact is calculated using the treasury stock method and relates to employee awards settled in shares of the Parent Company. The effect of these securities is anti-dilutive for periods that the Parent Company incurs a net loss available to common shareholders and therefore is excluded from the dilutive earnings per share calculation in such periods.

Unvested restricted shares are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the twelve months ended December 31, 2011 , 2010 and 2009 , earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted shares issued to the Company's executives and other employees under the 1997 Plan.

Common and Preferred Shares

On December 23, 2011 , the Parent Company issued 7,111,112 of its common shares in exchange for an equal number of Class F (2010) Units of the Operating Partnership. The Class F (2010) Units were issued in August 2010 as part of the acquisition of an office property and were subject to redemption at the option of the holder after the first anniversary of the issuance. The Operating Partnership had the option to satisfy the redemption either for an amount, per unit, of cash equal to the market price of one of the Parent Company's common shares (based on the five-day trading average ending on the date of the exchange) or for one of the Parent Company's common shares for each unit redeemed. On December 23, 2011, the Operating Partnership satisfied in full BAT Partners, L.P.'s tender for redemption of all 7,111,112 of the Class F (2010) Units through the issuance of 7,111,112 Parent Company's common shares.

On December 13, 2011 , the Parent Company declared a distribution of $0.15 per common share, totaling $21.5 million , which

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was paid on January 19, 2012 to shareholders of record as of January 5, 2012 . On December 13, 2011 , the Parent Company declared distributions on its Series C Preferred Shares and Series D Preferred Shares to holders of record as of December 30, 2011 . These shares are entitled to a preferential return of 7.50% and 7.375% , respectively. Distributions paid on January 17, 2012 to holders of Series C Preferred Shares and Series D Preferred Shares totaled $0.9 million and $1.1 million , respectively.

In March 2010, the Parent Company commenced a continuous equity offering program (the “Offering Program”), under which the Parent Company may sell up to an aggregate amount of 15,000,000 common shares until March 10, 2013. The Company may sell common shares in amounts and at times to be determined by the Parent Company. Actual sales will depend on a variety of factors as determined by the Company, including market conditions, the trading price of its common shares and determinations by the Parent Company of the appropriate sources of funding. In conjunction with the Offering Program, the Parent Company engages sales agents who received compensation, in aggregate, of up to 2% of the gross sales price per share sold. During the year ended December 31, 2011 , the Parent Company sold 679,285 shares under the Offering Program at an average sales price of $12.18 per share resulting in net proceeds of $8.0 million . The Parent Company contributed the net proceeds from the sale of its shares to the Operating Partnership in exchange for the issuance of 679,285 common partnership units to the Parent Company. The Operating Partnership used the net proceeds from the sales contributed by the Parent Company to repay balances on its Credit Facility and for general corporate purposes. From the inception of the Offering Program in March 2010 through December 31, 2011 , the Parent Company has sold 6,421,553 shares under this program resulting in 8,578,447 remaining shares available for sale.

In 2003, the Parent Company issued 2,000,000 7.50% Series C Cumulative Redeemable Preferred Shares (the “Series C Preferred Shares”) for net proceeds of $48.1 million . The Series C Preferred Shares are perpetual. On or after December 30, 2008 , the Parent Company, at its option, may redeem the Series C Preferred Shares, in whole or in part, by paying $25.00 per share, which is equivalent to its liquidation preference, plus accrued but unpaid dividends. See Note 13 for related discussion.

In 2004, the Parent Company issued 2,300,000 7.375% Series D Cumulative Redeemable Preferred Shares (the “Series D Preferred Shares”) for net proceeds of $55.5 million . The Series D Preferred Shares are perpetual. On or after February 27, 2009 , the Parent Company, at its option, may redeem the Series D Preferred Shares, in whole or in part, by paying $25.00 per share, which is equivalent to its liquidation preference, plus accrued but unpaid dividends. The Parent Company could not redeem Series D Preferred Shares before February 27, 2009 except to preserve its REIT status. See Note 13 for related discussion.

Common Share Repurchases

The Parent Company maintains a share repurchase program pursuant to which the Parent Company is authorized to repurchase its common shares from time to time. The Parent Company’s Board of Trustees initially authorized this program in 1998 and has periodically replenished capacity under the program. On May 2, 2006, the Board of Trustees restored capacity to 3.5 million common shares.

The Parent Company did not repurchase any shares during the year-ended December 31, 2011 . As of December 31, 2011 , the Company may purchase an additional 0.5 million shares under the plan.

Repurchases may be made from time to time in the open market or in privately negotiated transactions, subject to market conditions and compliance with legal requirements. The share repurchase program does not contain any time limitation and does not obligate the Parent Company to repurchase any shares. The Parent Company may discontinue the program at any time.

PARTNERS’ EQUITY OF THE OPERATING PARTNERSHIP

Earnings per Common Partnership Unit

The following table details the number of units and net income used to calculate basic and diluted earnings per common partnership unit (in thousands, except unit and per unit amounts; results may not add due to rounding):

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	Years ended December 31,
	2011				2010				2009
	Basic		Diluted		Basic		Diluted		Basic		Diluted
Numerator
Income (loss) from continuing operations	$ (13,232	)	$ (13,232	)	$ (31,276	)	$ (31,276	)	$ 3,588		$ 3,588
Net (loss) income from continuing operations attributable to non-controlling interests	—		—		—		—		(30	)	(30	)
Amount allocable to unvested restricted unitholders	(505	)	(505	)	(512	)	(512	)	(279	)	(279	)
Preferred share dividends	(7,992	)	(7,992	)	(7,992	)	(7,992	)	(7,992	)	(7,992	)
Loss from continuing operations available to common unitholders	(21,729	)	(21,729	)	(39,780	)	(39,780	)	(4,713	)	(4,713	)
Discontinued operations attributable to common unitholders	8,517		8,517		13,670		13,670		4,501		4,501
Net loss available to common unitholders	$ (13,212	)	$ (13,212	)	$ (26,110	)	$ (26,110	)	$ (212	)	$ (212	)
Denominator
Weighted-average units outstanding	145,118,841		145,118,841		137,454,796		137,454,796		114,712,869		114,712,869
Contingent securities/Stock based compensation	—		—		—		—		—		1,353,246
Total weighted-average units outstanding	145,118,841		145,118,841		137,454,796		137,454,796		114,712,869		116,066,115
Earnings (loss) per Common Share:
Loss from continuing operations attributable to common unitholders	$ (0.15	)	$ (0.15	)	$ (0.29	)	$ (0.29	)	$ (0.04	)	$ (0.04	)
Discontinued operations attributable to common unitholders	0.06		0.06		0.10		0.10		0.04		0.04
Net loss attributable to common unitholders	$ (0.09	)	$ (0.09	)	$ (0.19	)	$ (0.19	)	$ —		$ —

Unvested restricted shares are considered participating securities which require the use of the two-class method for the computation of basic and diluted earnings per share. For the years ended December 31, 2011 , 2010 , and 2009 earnings representing nonforfeitable dividends as noted in the table above were allocated to the unvested restricted shares.

Common Partnership Unit and Preferred Mirror Units

The Operating Partnership issues partnership units to the Parent Company in exchange for the contribution of the net proceeds of any equity security issuance by the Parent Company. The number and terms of such partnership units correspond to the number and terms of the related equity securities issued by the Parent Company. In addition, the Operating Partnership may also issue separate classes of partnership units. Historically, the Operating Partnership has had the following types of partnership units outstanding (i) Preferred Partnership Units which have been issued to parties other than the Parent Company (ii) Preferred Mirror Partnership Units which have been issued to the Parent Company and (iii) Common Partnership Units which include both interests held by the Parent Company and those held by other limited partners. Each of these interests is described in more detail below.

Preferred Mirror Partnership Units

In exchange for the proceeds received in corresponding offerings by the Parent Company of preferred shares of beneficial interest, the Operating Partnership has issued to the Parent Company a corresponding amount of Preferred Mirror Partnership Units with terms consistent with that of the preferred securities issued by the Parent Company.

On December 30, 2003, the Operating Partnership issued 2,000,000 Series D Preferred Mirror Units to the Parent Company in exchange for its contribution of the proceeds of its Series C Preferred Shares. The 2,000,000 Series D Preferred Mirror Units outstanding have an aggregate liquidation preference of $50.0 million , or $25.00 per unit. Cumulative distributions on the Series D Preferred Mirror Units are payable quarterly at an annualized rate of 7.50% of the liquidation preference. In the event that any of the Series C Preferred Shares of the Parent Company are redeemed, which may occur at the option of the Parent Company at any time on or after December 30, 2008 , then an equivalent number of Series D Preferred Mirror Units will be redeemed.

On February 27, 2004, the Operating Partnership issued 2,300,000 Series E Preferred Mirror Units to the Parent Company in exchange for its contribution of the net proceeds of its Series D Preferred Shares. The 2,300,000 Series E Preferred Mirror Units

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outstanding have an aggregate liquidation preference of $57.5 million , or $25.00 per unit. Cumulative distributions on the Series E Preferred Mirror Units are payable quarterly at an annualized rate of 7.375% of the liquidation preference. In the event that any of the Series D Preferred Shares of the Parent Company are redeemed, which may occur at the option of the Parent Company at any time on or after February 27, 2009 , then an equivalent number of Series E Preferred Mirror Units will be redeemed.

Common Partnership Units (Redeemable and General)

The Operating Partnership has two classes of Common Partnership Units: (i) Class A Limited Partnership Interest which are held by both the Parent Company and outside third parties and (iii) General Partnership Interests which are held by the Parent Company (collectively, the Class A Limited Partnership Interest, and General Partnership Interests are referred to as “Common Partnership Units”). The holders of the Common Partnership Units are entitled to share in cash distributions from, and in profits and losses of, the Operating Partnership, in proportion to their respective percentage interests, subject to preferential distributions on the preferred mirror units and the preferred units.

The Common Partnership Units held by the Parent Company (comprised of both General Partnership Units and Class A Limited Partnership Units) are presented as partner’s equity in the consolidated financial statements. Class A Limited Partnership Interest held by parties other than the Parent Company are redeemable at the option of the holder for a like number of common shares of the Parent Company, or cash, or a combination thereof, at the election of the Parent Company. Because the form of settlement of these redemption rights are not within the control of the Operating Partnership, these Common Partnership Units have been excluded from partner’s equity and are presented as redeemable limited partnership units measured at the potential cash redemption value as of the end of the periods presented based on the closing market price of the Parent Company’s common shares at December 31, 2011 , 2010 and 2009 , which was $9.50 , $11.65 , $11.40 , respectively. As of December 31, 2011 and 2010 , 2,698,647 and 2,791,640 of Class A Units, respectively, were outstanding and owned by outside limited partners of the Operating Partnership.

On December 23, 2011 , the Parent Company issued 7,111,112 of its common shares in exchange for an equal number of Class F (2010) Units of the Operating Partnership. The Class F (2010) Units were issued in August 2010 as part of the acquisition of an office property and were subject to redemption at the option of the holder after the first anniversary of the issuance. The Operating Partnership had the option to satisfy the redemption either for an amount, per unit, of cash equal to the market price of one of the Parent Company's common shares (based on the five-day trading average ending on the date of the exchange) or for one of the Parent Company's common shares for each unit redeemed. On December 23, 2011, the Operating Partnership satisfied in full BAT Partners, L.P.'s tender for redemption of all 7,111,112 of the Class F (2010) Units through the issuance of 7,111,112 Parent Company's common shares.

On December 13, 2011 , the Operating Partnership declared a distribution of $0.15 per Class A common unit, totaling $21.5 million , which was paid on January 19, 2012 to unitholders of record as of January 5, 2012 .

During the year ended December 31, 2011, the Parent Company has contributed net proceeds of $ 8.0 million from the sale of 679,285 common shares under its Offering Program to the Operating Partnership in exchange for the issuance of 679,285 common partnership units to the Parent Company. From the inception of the Offering Program in March 2010 through December 31, 2011 , the Parent Company has sold 6,421,553 shares under this program resulting in 8,578,447 remaining shares available for sale.

The Operating Partnership used the net proceeds from the sales to repay balances on its unsecured revolving credit facility and for general corporate purposes.

Common Share Repurchases

The Parent Company did not purchase any shares during the year-ended December 31, 2011 and accordingly, during the year ended December 31, 2011 , the Operating Partnership did not repurchase any units in connection with the Parent Company’s share repurchase program.

SHARE BASED COMPENSATION, 401(k) PLAN AND DEFERRED COMPENSATION

Stock Options

At December 31, 2011 , the Company had 3,599,672 options outstanding under its shareholder approved equity incentive plan. There were 1,311,943 options unvested as of December 31, 2011 and $2.4 million of unrecognized compensation expense associated

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with these options to be recognized over a weighted average period of 1.5 years. During the years ended December 31, 2011 , 2010 , and 2009 , the Company recognized $1.4 million , $1.0 million , and $0.6 million , respectively, of compensation expense included in general and administrative expense related to unvested options. During the year ended December 31, 2011 , the Company has also capitalized $0.4 million of compensation expense as part of the Company's review of employee salaries eligible for capitalization. During the years ended December 31, 2010 and 2009 , the Company has capitalized nominal amounts of compensation expense.

Option activity as of December 31, 2011 and changes during the year ended December 31, 2011 were as follows:

Outstanding at January 1, 2011	Shares — 3,116,611		Weighted Average Exercise Price — $ 14.56	Weighted Average Remaining Contractual Term (in years) — 7.81	Aggregate Intrinsic Value — $ (9,080,625	)
Granted	603,241		11.89	9.18	(1,441,746	)
Exercised	(120,180	)	2.91
Outstanding at December 31, 2011	3,599,672		$ 14.50	7.20	$ (18,015,060	)
Vested/Exercisable at December 31, 2011	2,287,729		$ 17.01	6.59	$ (16,912,225	)

The fair value of share option awards is estimated on the date of the grant using the Black-Scholes option valuation model. The following weighted-average assumptions were utilized in calculating the fair value of options granted during the years ended December 31, 2011 and 2010 :

Grant Date — Risk-free interest rate	March 2, 2011 — 2.86%		March 4, 2010 — 3.03%
Dividend yield	5.01%		6.53%
Volatility factor	48.02%		46.89%
Weighted-average expected life	7	yrs	7	yrs

	Years ended December 31,
	2010				2009
	Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (in Years)	Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (in Years)
Outstanding at beginning of year	2,404,567		$ 15.48	8.38	1,754,648		$ 20.41	8.77
Granted	724,805		11.31	9.18	676,491		2.91	9.25
Forfeited/Expired	(12,761	)	2.91	—	(26,572	)	20.61	—
Outstanding at end of year	3,116,611		$ 14.56	7.81	2,404,567		$ 15.48	8.38
Vested/Exercisable at end of year	1,384,728		$ 17.63	7.14	616,119		$ 20.03	7.54

On March 2, 2011 , the Compensation Committee of the Company's Board of Trustees awarded 603,241 options to the Company's executives. The options vest ratably over three years and have a ten year term. The vesting of the options is also subject to acceleration upon a change in control or if the recipient of the award were to die, become disabled, be terminated without cause or retire in a qualifying retirement prior to the vesting date. Qualifying retirement for options granted on March 2, 2011 means the recipient's voluntary termination of employment after reaching age 57 and accumulating at least 15 years of service with the Company. On May 24, 2011 , the Compensation Committee modified these options in respect of 101,437 shares awarded to one of the Company's executives. The modification, with the said executive's approval, provided additional vesting conditions linked to the Company's total shareholder return, which the Company will determine every year during the vesting period. The implementation of these market conditions did not materially impact total compensation expense expected to be recognized. The modified portion of the options will vest in whole or in part only if the Company's total shareholder return achieves specified

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targets, subject to vesting upon death, disability, qualifying retirement or a change of control. As of December 31, 2011 , none of the Company's executives had met conditions to elect a qualifying retirement.

401(k) Plan

The Company sponsors a 401(k) defined contribution plan for its employees. Each employee may contribute up to 100% of annual compensation, subject to specific limitations under the Internal Revenue Code. At its discretion, the Company can make matching contributions equal to a percentage of the employee’s elective contribution and profit sharing contributions. Effective October 1, 2011 , employees automatically vest in employer contributions. The Company contributions were $0.4 million in 2011 , $0.3 million in 2010 and $0.2 million in 2009 .

Restricted Share Awards

As of December 31, 2011 , 807,291 restricted shares were outstanding under the 1997 Plan and vest over three to seven years from the initial grant date . The remaining compensation expense to be recognized at December 31, 2011 was approximately $3.7 million . That expense is expected to be recognized over a weighted average remaining vesting period of 1.1 years. The Company recognized compensation expense related to outstanding restricted shares of $3.2 million during the year ended December 31, 2011 , of which $0.7 million was capitalized as part of the Company’s review of employee salaries eligible for capitalization. For the years ended December 31, 2010 and 2009 , the Company recognized $4.0 million (of which $0.9 million was capitalized) and $3.2 million (of which $0.8 million was capitalized), respectively, of compensation expense included in general and administrative expense in the respective periods related to outstanding restricted shares.

The following table summarizes the Company’s restricted share activity during the year ended December 31, 2011 :

Non-vested at January 1, 2011	Shares — 851,278		Weighted Average Grant Date Fair value — $ 10.75
Granted	197,035		11.92
Vested	(237,541	)	19.76
Forfeited	(3,481	)	11.47
Non-vested at December 31, 2011	807,291		$ 9.46

On March 2, 2011 , the Compensation Committee of the Company's Board of Trustees awarded 174,012 restricted shares to the Company's executives. The restricted shares will cliff vest after three years from the grant date . The vesting of the restricted shares is also subject to acceleration upon a change in control or if the recipient of the award were to die, become disabled, be terminated without cause or retire in a qualifying retirement prior to the vesting date. Qualifying retirement for restricted shares granted on March 2, 2011 as provided in the award agreements Plan means the recipient's voluntary termination of employment after reaching age 57 and accumulating at least 15 years of service with the Company. As of December 31, 2011 , none of the Company's executives had met conditions to elect a qualifying retirement.

Restricted Performance Share Units Plan

On March 2, 2011 , March 4, 2010 and April 1, 2009 , the Compensation Committee of the Parent Company’s Board of Trustees awarded an aggregate of 124,293 , 120,955 and 488,292 share-based awards, respectively, to its executives. These awards are referred to as Restricted Performance Share Units, or RPSUs. The RPSUs represent the right to earn common shares. The number of common shares, if any, deliverable to award recipients depends on the Company's performance based on its total return to shareholders during the three year measurement period that commenced on January 1, 2011 (in the case of the March 2, 2011 awards), January 1, 2010 (in the case of the March 4, 2010 awards) and January 1, 2009 (in the case of the April 1, 2009 awards) and that ends on the earlier of December 31, 2013 , December 31, 2012 or December 31, 2011 (as applicable) or the date of a change of control, compared to the total shareholder return of REITs within an index over such respective periods. The awards are also contingent upon the continued employment of the participants through the performance periods (with exceptions for death, disability and qualifying retirement). Dividends are deemed credited to the performance units accounts and are applied to “acquire” more performance units for the account of the unit holder at the price per common share ending on the dividend payment date. If earned, awards will be settled in common shares in an amount that reflects both the number of performance units in the holder’s account at the end of the applicable measurement period and the Company’s total return to shareholders during the applicable three year measurement period relative to the total shareholder return of the REIT within the index.

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If, based on an industry-based index at the end of the measurement period, the total shareholder return during the measurement period places the Company at or above a certain percentile as compared to its peers then the number of shares that will be delivered shall equal a certain percentage (not to exceed 200%) of the participant's base units . In the case of the April 1, 2009 award, a total of 372,101 shares were determined to be deliverable to award recipients on March 1, 2012 . These shares, which all vested on December 31, 2011 (the end of its three year -year measurement period), were also paid cash dividends on January 19, 2012 .

On the date of each grant, the awards were valued using a Monte Carlo simulation. The fair values of the 2011 and 2010 awards on the grant dates were $2.0 million , respectively, while the 2009 award was $1.1 million . The fair values of each award are being amortized over the three year cliff vesting period. In the case of the 2011 awards, the vesting of the RPSUs is also subject to acceleration upon a change in control or if the recipient of the award were to die, become disabled, terminated without cause or retire in a qualifying retirement prior to the vesting date. Qualifying retirement for restricted shares granted on March 2, 2011 as provided under the 1997 Plan means the recipient's voluntary termination of employment after reaching age 57 and accumulating at least 15 years of service with the Company. As of December 31, 2011 , none of the Company's executives has met conditions to elect a qualifying retirement.

During the year ended December 31, 2011 , the Company recognized total compensation expense for the 2011, 2010 and 2009 awards of $1.7 million related to this plan, of which $0.5 million was capitalized as part of the Company’s review of employee salaries eligible for capitalization. During the year ended December 31, 2010 , the Company recognized total compensation expense for both the 2010 and 2009 awards of $1.0 million related to this plan, of which nominal amounts were capitalized.

Outperformance Program

On August 28, 2006 , the Compensation Committee of the Parent Company’s Board of Trustees adopted a long-term incentive compensation program (the “outperformance program”) under the 1997 Plan. The outperformance program provided for share-based awards, with share issuances (if any), to take the form of both vested and restricted common shares and with any share issuances contingent upon the Company’s total shareholder return during a three year measurement period exceeding specified performance hurdles. These hurdles were not met and, accordingly, no shares were delivered under the outperformance program and the outperformance program, has terminated in accordance with its terms. The awards under the outperformance program were accounted for in accordance with the accounting standard for stock-based compensation. The aggregate grant date fair values of the awards under the outperformance program, as adjusted for estimated forfeitures, were approximately $5.9 million (with the values determined through a Monte Carlo simulation) and are being amortized into expense over the five -year vesting period beginning on the grant dates using a graded vesting attribution model. For the years ended December 31, 2011 , 2010 and 2009 , the Company recognized $0.1 million , $0.4 million and $0.9 million , respectively, of compensation expense related to the outperformance program. The grant date fair value is fully amortized as of December 31, 2011 .

Employee Share Purchase Plan

On May 9, 2007 , the Parent Company’s shareholders approved the 2007 Non-Qualified Employee Share Purchase Plan (the “ESPP”). The ESPP is intended to provide eligible employees with a convenient means to purchase common shares of the Parent Company through payroll deductions and voluntary cash purchases at an amount equal to 85% of the average closing price per share for a specified period . Under the plan document, the maximum participant contribution for the 2011 plan year is limited to the lesser of 20% of compensation or $50,000 . The number of shares reserved for issuance under the ESPP is 1.25 million . During the year ended December 31, 2011 , employees made purchases of $0.4 million under the ESPP and the Company recognized $0.1 million of compensation expense related to the ESPP. During the year ended December 31, 2010 , employees made purchases of $0.5 million under the ESPP and the Company recognized $0.2 million of compensation expense related to the ESPP. During the year ended December 31, 2009 , employees made purchases of $0.4 million under the ESPP and the Company recognized $0.3 million of compensation expense related to the ESPP. The Board of Trustees of the Parent Company may terminate the ESPP at its sole discretion at anytime.

Deferred Compensation

In January 2005 , the Parent Company adopted a Deferred Compensation Plan (the “Plan”) that allows trustees and certain key employees to voluntarily defer compensation. Compensation expense is recorded for the deferred compensation and a related liability is recognized. Participants may elect designated benchmark investment options for the notional investment of their deferred compensation. The deferred compensation obligation is adjusted for deemed income or loss related to the investments selected. At the time the participants defer compensation, the Company records a liability, which is included in the Company’s consolidated balance sheet. The liability is adjusted for changes in the market value of the participants’ selected investments at the end of each accounting period, and the impact of adjusting the liability is recorded as an increase or decrease to compensation cost. For the year ended December 31, 2011 , the Company recorded a nominal net decrease in compensation costs in connection with the Plan due to the change in market value of the participant investments in the Plan. For the years ended December 31, 2010 and 2009 ,

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the Company recorded a net increase in compensation costs of $1.0 million and $1.5 million , respectively, in connection with the Plan due to the change in market value of the participant investments in the Plan.

The deferred compensation obligations are unfunded, but the Company has purchased company-owned life insurance policies and mutual funds, which can be utilized as a future funding source for the Company’s obligations under the Plan. Participants in the Plan have no interest in any assets set aside by the Company to meet its obligations under the Plan. For the year ended December 31, 2011, the Company recorded a net increase in compensation costs of $0.1 million . For the years ended December 31, 2010 and 2009 , the Company recorded a net reduction in compensation costs of $1.0 million and $1.8 million , respectively , in connection with the investments in the Company-owned policies and mutual funds.

Participants in the Plan may elect to have all or a portion of their deferred compensation invested in the Company’s common shares. The Company holds these shares in a rabbi trust, which is subject to the claims of the Company’s creditors in the event of the Company’s bankruptcy or insolvency. The Plan does not provide for diversification of a participant’s deferral allocated to the Company common share and deferrals allocated to Company common share can only be settled with a fixed number of shares. In accordance with the accounting standard for deferred compensation arrangements where amounts earned are held in a rabbi trust and invested, the deferred compensation obligation associated with Company’s common shares is classified as a component of shareholder’s equity and the related shares are treated as shares to be issued and are included in total shares outstanding. At December 31, 2011 and 2010 , 0.3 million of such shares, respectively, were included in total shares outstanding. Subsequent changes in the fair value of the common shares are not reflected in operations or shareholders’ equity of the Company.

DISTRIBUTIONS

	Years ended December 31, — 2011	2010	2009
Common Share Distributions:
Ordinary income	$ 0.37	$ 0.60	$ 0.60
Capital gain	—	—	—
Non-taxable distributions	0.23	—	—
Distributions per share	$ 0.60	$ 0.60	$ 0.60
Percentage classified as ordinary income	61.67 %	100 %	100 %
Percentage classified as capital gain	— %	— %	— %
Percentage classified as non-taxable distribution	38.33 %	— %	— %
Preferred Share Distributions:
Total distributions declared	$ 7,992,000	$ 7,992,000	$ 7,992,000

TAX CREDIT TRANSACTIONS

Historic Tax Credit Transaction

On November 17, 2008 , the Company closed a transaction with US Bancorp (“USB”) related to the historic rehabilitation of the IRS Philadelphia Campus, a 862,692 square foot office building that is 100% leased to the IRS. On August 27, 2010, the Company completed the development of the IRS Philadelphia Campus and the IRS lease commenced. USB agreed to contribute approximately $64.1 million of project costs and advanced $10.2 million of that amount contemporaneously with the closing of the transaction. USB subsequently advanced an additional $27.4 million and $23.8 million in June 2010 and December 2009, respectively. On October 19, 2011 , the Company received the remaining $2.7 million of the total contributions upon its completion of certain items and compliance with the federal rehabilitation regulations.

In exchange for its contributions into the development of IRS Philadelphia Campus, USB is entitled to substantially all of the benefits derived from the tax rehabilitation credits available under section 47 of the Internal Revenue Code. USB does not have a material interest in the underlying economics of the property. This transaction includes a put/call provision whereby the Company may be obligated or entitled to repurchase USB’s interest in the IRS Philadelphia Campus. The Company believes the put will be exercised and the amount attributed to that puttable non-controlling interest obligation is included in other liabilities and is being accreted to the expected fixed put price.

Based on the contractual arrangements that obligate the Company to deliver tax benefits and provide other guarantees to USB and that entitle the Company through fee arrangements to receive substantially all available cash flow from the IRS Philadelphia Campus, the Company concluded that the IRS Philadelphia Campus should be consolidated. The Company also concluded that

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capital contributions received from USB, in substance, are consideration that the Company receives in exchange for its obligation to deliver tax credits and other tax benefits to USB. These receipts other than the amounts allocated to the put obligation will be recognized as historic tax credit transaction income in the consolidated financial statements beginning when the obligation to USB is relieved which occurs upon delivery of the expected tax benefits net of any associated costs. The tax credit is subject to 20% recapture per year beginning one year after the completion of the IRS Philadelphia Campus. The total USB contributions presented within deferred income in the Company's consolidated balance sheet amounted to to $51.6 million as of December 31, 2011 and $61.4 million as of December 31, 2010 , respectively. The contributions were recorded net of the amount allocated to non-controlling interest as described above of $2.4 million and $2.1 million at December 31, 2011 and December 31, 2010 , respectively. Beginning in September 2011 to September 2015 , the Company recognized and will recognize the cash received as revenue net of allocated expenses over the five year credit recapture period as defined in the Internal Revenue Code within other income (expense) in its consolidated statements of operations. During the year ended December 31, 2011 , the Company recognized $12.0 million of the cash received as revenue net of $0.5 million of allocated expenses within other income (expense) in its consolidated statements of operations.

Direct and incremental costs incurred in structuring the transaction are deferred and will be recognized as expense in the consolidated financial statements upon the recognition of the related revenue as discussed above. The deferred costs at December 31, 2011 and 2010 are $2.1 million and $4.3 million , respectively, and are included in other assets on the Company’s consolidated balance sheet. Amounts included in interest expense related to the accretion of the non-controlling interest liability and the 2% return expected to be paid to USB on its non-controlling interest aggregate to $1.3 million , $1.1 million and $0.2 million for years ended December 31, 2011 , 2010 and 2009 , respectively.

New Markets Tax Credit Transaction

On December 30, 2008 , the Company entered into a transaction with USB related to the Cira South Garage in Philadelphia, Pennsylvania and expects to receive a net benefit of $7.8 million under a qualified New Markets Tax Credit Program (“NMTC”). The NMTC was provided for in the Community Renewal Tax Relief Act of 2000 (the “Act”) and is intended to induce investment capital in underserved and impoverished areas of the United States. The Act permits taxpayers (whether companies or individuals) to claim credits against their Federal income taxes for up to 39% of qualified investments in qualified, active low-income businesses or ventures.

USB contributed $13.3 million into the development of the Cira South Garage and as such it is entitled to substantially all of the benefits derived from the tax credit, but it does not have a material interest in the underlying economics of the Cira South Garage. This transaction also includes a put/call provision whereby the Company may be obligated or entitled to repurchase USB’s interest. The Company believes the put will be exercised and an amount attributed to that obligation is included in other liabilities and is being accreted to the expected fixed put price. The said put price is insignificant.

Based on the contractual arrangements that obligate the Company to deliver tax benefits and provide various other guarantees to USB, the Company concluded that the investment entities established to facilitate the NMTC transaction should be consolidated. The USB contribution of $13.3 million is included in deferred income on the Company’s consolidated balance sheet at December 31, 2011 and December 31, 2010 . The USB contribution other than the amount allocated to the put obligation will be recognized as income in the consolidated financial statements when the tax benefits are delivered without risk of recapture to the tax credit investors and the Company’s obligation is relieved. The Company anticipates that it will recognize the net cash received as revenue within other income/expense in the year ended December 31, 2015 . The NMTC is subject to 100% recapture for a period of seven years as provided in the Internal Revenue Code. The Company expects that the put/call provision will be exercised in December 2015 when the recapture period ends.

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table details the components of accumulated other comprehensive income (loss) of the Parent Company and the Operating Partnership as of and for the three years ended December 31, 2011 (in thousands):

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Parent Company — Balance at January 1, 2009	Unrealized Gains (Losses) on Securities — $ (9	)	Cash Flow Hedges — $ (16,996	)	Accumulated Other Comprehensive Loss — $ (17,005	)
Change during year	—		7,395		7,395
Non-controlling interest — consolidated real estate venture partner’s share of unrealized (gains)/losses on derivative financial instruments	—		290		290
Ineffectiveness of forward starting swaps	—		(125	)	(125	)
Other	—		491		491
Reclassification adjustments for (gains) losses reclassified into operations	—		(184	)	(184	)
Balance at December 31, 2009	$ (9	)	$ (9,129	)	$ (9,138	)
Change during year	—		7,320		7,320
Non-controlling interest — consolidated real estate venture partner’s share of unrealized (gains)/losses on derivative financial instruments	—		(155	)	(155	)
Reclassification adjustments for (gains) losses reclassified into operations	—		28		28
Balance at December 31, 2010	$ (9	)	$ (1,936	)	$ (1,945	)
Change during year	—		(4,499	)	(4,499	)
Non-controlling interest — consolidated real estate venture partner’s share of unrealized (gains)/losses on derivative financial instruments	—		212		212
Reclassification adjustments for (gains) losses reclassified into operations	—		153		153
Balance at December 31, 2011	$ (9	)	$ (6,070	)	$ (6,079	)

Operating Partnership — Balance at January 1, 2009	Unrealized Gains (Losses) on Securities — $ (9	)	Cash Flow Hedges — $ (16,996	)	Accumulated Other Comprehensive Loss — $ (17,005	)
Change during year	—		7,395		7,395
Ineffectiveness of forward starting swaps	—		(125	)	(125	)
Other	—		491		491
Reclassification adjustments for (gains) losses reclassified into operations	—		(184	)	(184	)
Balance at December 31, 2009	$ (9	)	$ (9,419	)	$ (9,428	)
Change during year	—		7,320		7,320
Reclassification adjustments for (gains) losses reclassified into operations	—		28		28
Balance at December 31, 2010	$ (9	)	$ (2,071	)	$ (2,080	)
Change during year			(4,499	)	(4,499	)
Reclassification adjustments for (gains) losses reclassified into operations	—		153		153
Balance at December 31, 2011	$ (9	)	$ (6,417	)	$ (6,426	)

Over time, the unrealized gains and losses held in Accumulated Other Comprehensive Income (“AOCI”) will be reclassified to earnings when the related hedged items are recognized in earnings. The current balance held in AOCI is expected to be reclassified to earnings for realized losses on forecasted debt transactions over the related term of the debt obligation, as applicable.

SEGMENT INFORMATION

As of December 31, 2011 , the Company manages its portfolio within seven segments: (1) Pennsylvania Suburbs, (2) Philadelphia Central Business District (CBD) (3) Metropolitan Washington D.C., (4) New Jersey/Delaware, (5) Richmond, Virginia, (6) Austin,

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Texas, and (7) California. The Pennsylvania Suburbs segment includes properties in Chester, Delaware, and Montgomery counties in the Philadelphia suburbs. The Philadelphia CBD segment includes properties in the City of Philadelphia, Pennsylvania. The Metropolitan Washington, D.C. segment includes properties in Northern Virginia and suburban Maryland. The New Jersey/Delaware segment includes properties in Burlington, Camden and Mercer counties and in New Castle county in the state of Delaware. The Richmond, Virginia segment includes properties primarily in Albemarle, Chesterfield, Goochland and Henrico counties and Durham, North Carolina. The Austin, Texas segment includes properties in Austin. The California segment includes properties in Oakland, Concord, Carlsbad and Rancho Bernardo. The corporate group is responsible for cash and investment management, development of certain real estate properties during the construction period, and certain other general support functions. Land held for development and construction in progress are transferred to operating properties by region upon completion of the associated construction or project.

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Segment information for the three years ended December 31, 2011 , 2010 and 2009 are as follows (in thousands):

	Pennsylvania Suburbs	Philadelphia CBD	Metropolitan, D.C.	New Jersey /Delaware	Richmond, Virginia	Austin, Texas	California	Corporate		Total
2011:
Real estate investments, at cost:
Operating properties	$ 1,218,071	$ 953,870	$ 1,255,803	$ 545,657	$ 307,698	$ 257,694	$ 254,287	$ —		$ 4,793,080
Construction-in-progress								25,083		$ 25,083
Land inventory								109,008		$ 109,008
Total revenue	158,248	125,366	128,456	81,629	36,789	30,895	21,670	(1,248	)	581,805
Property operating expenses, real estate taxes and third party management expenses	58,440	48,792	47,786	40,500	14,727	13,048	11,507	(989	)	233,811
Net operating income	$ 99,808	$ 76,574	$ 80,670	$ 41,129	$ 22,062	$ 17,847	$ 10,163	$ (259	)	$ 347,994
2010:
Real estate investments, at cost:
Operating properties	$ 1,199,957	$ 911,354	$ 1,359,776	$ 568,413	$ 294,406	$ 254,019	$ 246,186	$ —		$ 4,834,111
Construction-in-progress	—	—	—	—	—	—	—	33,322		33,322
Land inventory	—	—	—	—	—	—	—	110,055		110,055
Total revenue	152,380	92,110	137,923	87,711	36,032	32,049	22,551	(800	)	559,956
Property operating expenses, real estate taxes and third party management expenses	59,065	37,896	48,318	44,137	14,010	13,401	11,852	(1,338	)	227,341
Net operating income	$ 93,315	$ 54,214	$ 89,605	$ 43,574	$ 22,022	$ 18,648	$ 10,699	$ 538		$ 332,615
2009:
Real estate investments, at cost:
Operating properties	$ 1,219,391	$ 490,602	$ 1,372,213	$ 605,181	$ 301,474	$ 268,806	$ 254,951	$ —		$ 4,512,618
Construction-in-progress	—		—	—	—	—	—	271,962		271,962
Land inventory	—		—	—	—	—	—	97,368		97,368
Total revenue	157,616	73,534	140,438	98,344	36,201	31,311	29,283	1,193		567,920
Property operating expenses, real estate taxes and third party management expenses	56,297	31,479	52,899	45,421	13,871	14,351	14,735	(1,893	)	227,160
Net operating income	$ 101,319	$ 42,055	$ 87,539	$ 52,923	$ 22,330	$ 16,960	$ 14,548	$ 3,086		$ 340,760

Net operating income ("NOI") is defined as total revenue less property operating expenses, real estate taxes and third party management expenses. Segment NOI includes revenue, real estate taxes and property operating expenses directly related to operation of the properties within the respective geographical region. Segment NOI excludes property level depreciation and amortization, revenue and expenses directly associated with third party real estate management services, expenses associated with corporate administrative support services, and inter-company eliminations. NOI is the measure that is used by the Company to evaluate the operating performance of its real estate assets by segment. The Company also believes that NOI provides useful information to investors regarding its financial condition and results of operations because it reflects only those income and expenses recorded at the property level. NOI does not also reflect general and administrative expenses, interest expenses, real estate impairment losses, depreciation and amortization costs, capital expenditures and leasing costs, or trends in development and construction activities that could materially impact the Company's results from operations. All companies may not also calculate NOI in the same manner. The Company believes that net income, as defined by GAAP, is the most appropriate earnings measure.

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Below is a reconciliation of consolidated net operating income to consolidated income (loss) from continuing operations:

	Year Ended December 31, — 2011		2010		2009
	(amounts in thousands)
Consolidated net operating income	$ 347,994		$ 332,615		$ 340,760
Less:
Interest expense	(131,405	)	(132,640	)	(135,740	)
Deferred financing costs	(4,991	)	(3,770	)	(5,864	)
Depreciation and amortization	(217,680	)	(210,592	)	(203,572	)
Administrative expenses	(24,602	)	(23,306	)	(20,821	)
Recognized Hedge Activity	—		—		(916	)
Plus:
Interest income	1,813		3,222		2,499
Historic tax credit transaction income	12,026		—		—
Equity in income of real estate ventures	3,775		5,305		4,069
Net gain on sales of interests in real estate ventures	2,791		—		(3	)
Net gain on sale of undepreciated real estate	45		—		—
Loss on real estate venture formation	(222	)	—		—
Gain (loss) on early extinguishment of debt	(2,776	)	(2,110	)	23,176
Income (loss) from continuing operations	(13,232	)	(31,276	)	3,588
Income from discontinued operations	8,517		13,670		4,501
Net income (loss)	$ (4,715	)	$ (17,606	)	$ 8,089

OPERATING LEASES

The Company leases properties to tenants under operating leases with various expiration dates extending to 2030. Minimum future rentals on non-cancelable leases at December 31, 2011 are as follows (in thousands):

Year	Minimum Rent
2012	$ 443,103
2013	424,764
2014	384,539
2015	344,641
2016	295,045
Thereafter	1,090,697

Total minimum future rentals presented above do not include amounts to be received as tenant reimbursements for operating costs.

COMMITMENTS AND CONTINGENCIES

Legal Proceedings

The Company is involved from time to time in litigation on various matters, including disputes with tenants and disputes arising out of agreements to purchase or sell properties. Given the nature of the Company’s business activities, these lawsuits are considered routine to the conduct of its business. The result of any particular lawsuit cannot be predicted, because of the very nature of litigation, the litigation process and its adversarial nature, and the jury system. The Company does not expect that the liabilities, if any, that may ultimately result from such legal actions will have a material adverse effect on the consolidated financial position, results of operations or cash flows of the Company.

Letters-of-Credit

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Under certain mortgages, the Company has funded required leasing and capital reserve accounts for the benefit of the mortgage lenders with letters-of-credit which totaled $1.9 million and $13.2 million at December 31, 2011 and 2010 , respectively. Certain of the tenant rents at properties that secure these mortgage loans are deposited into the loan servicer’s depository accounts, which are used to fund debt service, operating expenses, capital expenditures and the escrow and reserve accounts, as necessary. Any excess cash is included in cash and cash equivalents.

Ground Rent

Future minimum rental payments under the terms of all non-cancelable ground leases under which the Company is the lessee are expensed on a straight-line basis regardless of when payments are due. The Company's ground leases have remaining lease terms ranging from 18 to 92 years. Minimum future rental payments on non-cancelable leases at December 31, 2011 are as follows (in thousands):

2012	$
2013	1,818
2014	1,818
2015	1,909
2016	1,909
Thereafter	289,440

One of the land leases provides for contingent rent participation by the lessor in certain capital transactions and net operating cash flows of the property after certain returns are achieved by the Company. Such amounts, if any, will be reflected as contingent rent when incurred. The leases also provide for payment by the Company of certain operating costs relating to the land, primarily real estate taxes. The above schedule of future minimum rental payments does not include any contingent rent amounts, nor any reimbursed expenses.

The Company acquired ground tenancy rights under a long term ground lease agreement related to its acquisition of an office building in Philadelphia, Pennsylvania on August 12, 2011 . The annual rental payments under this ground lease is equal to a percentage of the NOI generated by the property. The Company has not included the amounts in the table above since such amounts are not fixed or determinable.

The Company also acquired ground tenancy rights under a long term ground lease agreement through its acquisition of Three Logan Square on August 5, 2010 . The annual rental payment under this ground lease is ten dollars through August 2022 which is when the initial term of the ground lease will end. After the initial term, the Company has the option to renew the lease until 2091 . The Company also has the option to purchase the land at fair market value after providing a written notice to the owner. The annual rental payment after 2022 will be adjusted at the lower of $3.0 million or the prevailing market rent at that time until 2030. Subsequent to 2030, the annual rental payment will be adjusted at the lower of $4.0 million or the prevailing market rent at the time until 2042 and at fair market value until 2091. The Company believes that based on conditions as of the date the lease was assigned ( August 5, 2010 ), the lease will reset to market after the initial term. Using the estimated fair market rent as of the date of the acquisition over the extended term of the ground lease (assuming the purchase option is not exercised), the future payments will aggregate to $27.4 million . The Company has not included the amounts in the table above since such amounts are not fixed and determinable.

Other Commitments or Contingencies

As part of the Company’s September 2004 acquisition of a portfolio of properties from The Rubenstein Company (which the Company refers to as the TRC acquisition), the Company acquired its interest in Two Logan Square, a 708,844 square foot office building in Philadelphia, primarily through its ownership of a second and third mortgage secured by this property. This property is consolidated as the borrower is a variable interest entity and the Company, through its ownership of the second and third mortgages, is the primary beneficiary. The Company currently does not expect to take title to Two Logan Square until, at the earliest, September 2019 . If the Company takes fee title to Two Logan Square upon a foreclosure of its mortgage, the Company has agreed to pay an unaffiliated third party that holds a residual interest in the fee owner of this property an amount equal to $2.9 million . On the TRC acquisition date, the Company recorded a liability of $0.7 million and this amount will accrete up to $2.9 million through September 2019 . As of December 31, 2011 , the Company has a balance of $1.3 million for this liability in its consolidated balance sheet.

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The Company has been audited by the Internal Revenue Service (the “IRS”) for its 2004 tax year. The audit concerned the tax treatment of the TRC acquisition in September 2004 in which the Company acquired a portfolio of properties through the acquisition of a limited partnership. On December 17, 2010 , the Company received notice that the IRS proposed an adjustment to the allocation of recourse liabilities allocated to the contributor of the properties. The Company has appealed the proposed adjustment. The proposed adjustment, if upheld, would not result in a material tax liability for the Company. However, an adjustment could raise a question as to whether a contributor of partnership interests in the 2004 transaction could assert a claim against the Company under the tax protection agreement entered into as part of the transaction.

As part of the Company’s 2006 merger with Prentiss Properties Trust, the 2004 TRC acquisition and several of the Company's other transactions, the Company agreed not to sell certain of the properties it acquired in transactions that would trigger taxable income to the former owners. In the case of the TRC acquisition, the Company agreed not to sell acquired properties for periods up to 15 years from the date of the TRC acquisition as follows at December 31, 2011 : One Rodney Square and 130/150/170 Radnor Financial Center (January 2015); and One Logan Square, Two Logan Square and Radnor Corporate Center (January 2020). In the Prentiss acquisition, the Company assumed the obligation of Prentiss not to sell Concord Airport Plaza before March 2018. The Company’s agreements generally provide that it may dispose of the subject properties only in transactions that qualify as tax-free exchanges under Section 1031 of the Internal Revenue Code or in other tax deferred transactions. If the Company were to sell a restricted property before expiration of the restricted period in a non-exempt transaction, the Company may be required to make significant payments to the parties who sold the applicable property on account of tax liabilities attributed to them.

As part of the Company’s acquisition of properties from time to time in tax-deferred transactions, the Company has agreed to provide certain of the prior owners of the acquired properties with the right to guarantee the Company’s indebtedness. If the Company were to seek to repay the indebtedness guaranteed by the prior owner before the expiration of the applicable agreement, the Company will be required to provide the prior owner an opportunity to guaranty a qualifying replacement debt. These debt maintenance agreements may limit the Company’s ability to refinance indebtedness on terms that will be favorable to the Company.

The Company invests in its properties and regularly incurs capital expenditures in the ordinary course to maintain the properties. The Company believes that such expenditures enhance its competitiveness. The Company also enters into construction, utility and service contracts in the ordinary course of business which may extend beyond one year. These contracts typically provide for cancellation with insignificant or no cancellation penalties.

During 2008 , in connection with the development of the IRS Philadelphia Campus and the Cira South Garage, the Company entered into a historic tax credit and a new market tax credit arrangement (see Note 16), respectively. The Company is required to be in compliance with various laws, regulations and contractual provisions that apply to its historic and new market tax credit arrangements. Non-compliance with applicable requirements could result in projected tax benefits not being realized and require a refund or reduction of investor capital contributions, which are reported as deferred income in the Company’s consolidated balance sheet, until such time as its obligation to deliver tax benefits is relieved. The remaining compliance periods for its tax credit arrangements runs through 2015 . The Company does not anticipate that any material refunds or reductions of investor capital contributions will be required in connection with these arrangements.

SUBSEQUENT EVENT

The Company has evaluated subsequent events through the date the financial statements were issued.

SUMMARY OF QUARTERLY RESULTS (UNAUDITED)

The following is a summary of quarterly financial information as of and for the years ended December 31, 2011 and 2010 (in thousands, except per share data):

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	1st Quarter (a)		2nd Quarter (b)		3rd Quarter		4th Quarter
2011:
Total revenue	$ 146,794		$ 144,094		$ 144,308		$ 146,609
Net income (loss)	(490	)	(6,234	)	6,611		(4,602	)
Net income (loss) allocated to Common Shares	(439	)	(6,069	)	6,249		(4,240	)
Basic earnings (loss) per Common Share	$ (0.02	)	$ (0.06	)	$ 0.03		$ (0.05	)
Diluted earnings (loss) per Common Share	$ (0.02	)	$ (0.06	)	$ 0.03		$ (0.05	)
2010:
Total revenue	$ 139,502		$ 134,191		$ 140,179		$ 146,084
Net loss	(399	)	(5,600	)	(6,616	)	(4,991	)
Loss allocated to Common Shares	(348	)	(5,441	)	(6,437	)	(4,848	)
Basic loss per Common Share	$ (0.02	)	$ (0.06	)	$ (0.06	)	$ (0.05	)
Diluted loss per Common Share	$ (0.02	)	$ (0.06	)	$ (0.06	)	$ (0.05	)

(a) During the first quarter of 2011 , the Company recorded additional income of $0.5 million related to electricity charges in prior years that were under-billed to a certain tenant. This resulted in the overstatement of total revenue by $0.5 million during the current year and in the understatement of total revenue by $0.3 million and $0.2 million for the years ended December 31, 2009 and 2008 , respectively. As management believes that this error was not material to prior years' consolidated financial statements and that the impact of recording the error in the current year is not material to the Company's consolidated financial statements, the Company recorded the related adjustment in the current year.

(b) The consolidated statement of operations for the second quarter of 2011 also contained an out of period depreciation and amortization expense adjustment of $4.7 million relating to intangible assets representing tenant relationships and in-place leases that should have been written off in prior periods. This resulted in the overstatement of depreciation and amortization expense by $4.7 million million in the current year. During the year ended December 31, 2010 , depreciation and amortization expense was overstated by $1.7 million and was understated by $1.4 million , $1.8 million , $1.7 million and $1.5 million during the years ended December 31, 2009 , 2008 , 2007 , and 2006 , respectively. As management believes that this error was not material to prior years' consolidated financial statements and that the impact of recording the error in the current year is not material to the Company's consolidated financial statements, the Company recorded the related adjustment during the current year.

The summation of quarterly earnings per share amounts do not necessarily equal the full year amounts. The above information was updated to reclassify amounts previously reported to reflect discontinued operations. See Note 2 and Note 10.

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Brandywine Realty Trust and Brandywine Operating Partnership, L.P.

Schedule II

Valuation and Qualifying Accounts

(in thousands)

Description	Balance at Beginning of Period	Additions	Deductions (1)	Balance at End of Period
Allowance for doubtful accounts:
Year ended December 31, 2011	$ 15,222	$ 928	$ 665	$ 15,485
Year ended December 31, 2010	$ 16,363	$ 763	$ 1,904	$ 15,222
Year ended December 31, 2009	$ 15,474	$ 2,596	$ 1,707	$ 16,363

(1) Deductions represent amounts that the Company had fully reserved for in prior periods and pursuit of collection of such amounts was ceased during the period.

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BRANDYWINE REALTY TRUST AND BRANDYWINE OPERATING PARTNERSHIP, L.P.

Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
PENNSYLVANIA SUBURBS
400 Berwyn Park	Berwyn	PA	—	2,657	4,462	15,031		2,657	19,493	22,150	6,742	1999	1999	40
300 Berwyn Park	Berwyn	PA	9,971	2,206	13,422	4,161		2,206	17,583	19,789	6,554	1989	1997	40
1200 Swedesford Road	Berwyn	PA	1,887	2,595	11,809	3,778		2,596	15,586	18,182	3,893	1994	2001	40
1050 Westlakes Drive	Berwyn	PA	—	2,611	10,445	5,046		2,611	15,491	18,102	5,820	1984	1999	40
200 Berwyn Park	Berwyn	PA	6,887	1,533	9,460	1,615		1,533	11,075	12,608	4,512	1987	1997	40
1180 Swedesford Road	Berwyn	PA	—	2,086	8,342	1,262		2,085	9,605	11,690	3,198	1987	2001	40
100 Berwyn Park	Berwyn	PA	5,299	1,180	7,290	2,144		1,180	9,434	10,614	3,636	1986	1997	40
1160 Swedesford Road	Berwyn	PA	—	1,781	7,124	1,071		1,781	8,195	9,976	2,690	1986	2001	40
1100 Cassett Road	Berwyn	PA	—	1,695	6,779	102		1,694	6,882	8,576	1,823	1997	2001	40
980 Harvest Drive	Blue Bell	PA	—	3,304	16,960	(808	)	3,304	16,152	19,456	5,167	1988	2002	40
925 Harvest Drive	Blue Bell	PA	—	1,671	6,606	770		1,670	7,377	9,047	2,837	1990	1998	40
920 Harvest Drive	Blue Bell	PA	—	1,209	6,595	(125	)	1,208	6,471	7,679	3,088	1990	1998	40
426 Lancaster Avenue	Devon	PA	—	1,689	6,756	405		1,688	7,162	8,850	2,884	1990	1998	40
52 Swedesford Square	East Whiteland Twp.	PA	—	4,241	16,579	557		4,241	17,136	21,377	6,341	1988	1998	40
429 Creamery Way	Exton	PA	—	1,368	5,471	451		1,368	5,922	7,290	1,667	1996	2001	40
412 Creamery Way	Exton	PA	—	1,195	4,779	1,123		1,195	5,902	7,097	1,612	1999	2001	40
440 Creamery Way	Exton	PA	—	982	3,927	1,900		982	5,827	6,809	2,124	1991	2001	40
436 Creamery Way	Exton	PA	—	994	3,978	686		994	4,664	5,658	1,251	1991	2001	40
467 Creamery Way	Exton	PA	—	906	3,623	1,070		906	4,693	5,599	1,353	1988	2001	40
100 Arrandale Boulevard	Exton	PA	—	970	3,878	274		970	4,152	5,122	1,275	1997	2001	40
457 Creamery Way	Exton	PA	—	777	3,107	1,035		777	4,142	4,919	1,062	1990	2001	40
486 Thomas Jones Way	Exton	PA	—	806	3,256	605		806	3,861	4,667	1,710	1990	1996	40
468 Thomas Jones Way	Exton	PA	—	526	2,112	612		526	2,724	3,250	972	1990	1996	40
456 Creamery Way	Exton	PA	—	635	2,548	(48	)	636	2,499	3,135	1,135	1987	1996	40
481 John Young Way	Exton	PA	—	496	1,983	14		496	1,997	2,493	540	1997	2001	40
111 Arrandale Road	Exton	PA	—	262	1,048	125		262	1,173	1,435	404	1996	2001	40
One Progress Drive	Horsham	PA	—	1,399	5,629	4,466		1,399	10,095	11,494	2,777	1986	1996	40
500 Enterprise Drive	Horsham	PA	—	1,303	5,188	3,228		1,303	8,416	9,719	2,566	1990	1996	40
640 Freedom Business Center	King Of Prussia	PA	—	4,222	16,891	2,964		4,222	19,855	24,077	7,867	1991	1998	40
555 Croton Road	King of Prussia	PA	—	4,486	17,943	1,215		4,486	19,158	23,644	5,461	1999	2001	40
630 Allendale Road	King of Prussia	PA	—	2,836	4,028	12,275		2,636	16,503	19,139	4,385	2000	2000	40
1000 First Avenue	King Of Prussia	PA	—	2,772	10,936	3,524		2,772	14,460	17,232	5,838	1980	1998	40
620 Freedom Business Center	King Of Prussia	PA	—	2,770	11,014	3,413		2,769	14,428	17,197	6,184	1986	1998	40
1060 First Avenue	King Of Prussia	PA	—	2,712	10,953	2,378		2,712	13,331	16,043	5,006	1987	1998	40
1040 First Avenue	King Of Prussia	PA	—	2,860	11,282	1,303		2,860	12,585	15,445	4,717	1985	1998	40

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BRANDYWINE REALTY TRUST AND BRANDYWINE OPERATING PARTNERSHIP, L.P.

Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
630 Freedom Business Center	King Of Prussia	PA	—	2,773	11,144	1,199		2,773	12,343	15,116	4,910	1989	1998	40
1020 First Avenue	King Of Prussia	PA	—	2,168	8,576	4,117		2,168	12,693	14,861	5,079	1984	1998	40
610 Freedom Business Center	King Of Prussia	PA	—	2,017	8,070	1,195		2,017	9,265	11,282	3,546	1985	1998	40
500 North Gulph Road	King Of Prussia	PA	—	1,303	5,201	1,834		1,303	7,035	8,338	2,988	1979	1996	40
650 Park Avenue	King Of Prussia	PA	—	1,916	4,378	2,042		1,917	6,419	8,336	2,819	1968	1998	40
741 First Avenue	King Of Prussia	PA	—	1,287	5,151	12		1,288	5,162	6,450	1,996	1966	1998	40
875 First Avenue	King Of Prussia	PA	—	618	2,473	3,239		618	5,712	6,330	2,438	1966	1998	40
751-761 Fifth Avenue	King Of Prussia	PA	—	1,097	4,391	31		1,097	4,422	5,519	1,712	1967	1998	40
600 Park Avenue	King Of Prussia	PA	—	1,012	4,048	385		1,012	4,433	5,445	1,684	1964	1998	40
620 Allendale Road	King Of Prussia	PA	—	1,020	3,839	503		1,020	4,342	5,362	1,645	1961	1998	40
660 Allendale Road	King Of Prussia	PA	—	396	948	2,505		1,085	2,764	3,849	42	2011	1998	40
640 Allendale Road	King of Prussia	PA	—	439	432	1,553		439	1,985	2,424	564	2000	2000	40
101 Lindenwood Drive	Malvern	PA	—	4,152	16,606	3,331		4,152	19,937	24,089	4,954	1988	2001	40
301 Lindenwood Drive	Malvern	PA	—	2,729	10,915	1,264		2,729	12,179	14,908	3,541	1984	2001	40
300 Lindenwood Drive	Malvern	PA	—	848	3,394	1,334		849	4,727	5,576	1,532	1991	2001	40
1700 Paoli Pike	Malvern	PA	—	458	559	3,018		488	3,547	4,035	977	2000	2000	40
100 Lindenwood Drive	Malvern	PA	—	473	1,892	188		474	2,079	2,553	575	1985	2001	40
200 Lindenwood Drive	Malvern	PA	—	324	1,295	335		324	1,630	1,954	378	1984	2001	40
14 Campus Boulevard	Newtown Square	PA	6,384	2,244	4,217	1,515		2,243	5,733	7,976	2,311	1998	1998	40
11 Campus Boulevard	Newtown Square	PA	4,379	1,112	4,067	1,047		1,112	5,114	6,226	1,836	1998	1999	40
17 Campus Boulevard	Newtown Square	PA	4,458	1,108	5,155	(397	)	1,108	4,758	5,866	1,098	2001	N/A	40
15 Campus Boulevard	Newtown Square	PA	4,555	1,164	3,896	229		1,164	4,125	5,289	1,016	2002	N/A	40
18 Campus Boulevard	Newtown Square	PA	3,431	787	3,312	313		787	3,625	4,412	1,780	1990	1996	40
401 Plymouth Road	Plymouth Meeting	PA	—	6,198	16,131	15,959		6,199	32,089	38,288	8,130	2001	N/A	40
4000 Chemical Road	Plymouth Meeting	PA	—	4,373	24,546	4,509		4,373	29,055	33,428	4,005	2006	N/A	40
610 West Germantown Pike	Plymouth Meeting	PA	—	3,651	14,514	3,017		3,651	17,531	21,182	4,595	1987	2002	40
600 West Germantown Pike	Plymouth Meeting	PA	—	3,652	15,288	1,958		3,652	17,246	20,898	4,225	1986	2002	40
630 West Germantown Pike	Plymouth Meeting	PA	—	3,558	14,743	2,199		3,558	16,942	20,500	4,585	1988	2002	40
620 West Germantown Pike	Plymouth Meeting	PA	—	3,572	14,435	1,220		3,572	15,655	19,227	3,921	1990	2002	40
2240/2250 Butler Pike	Plymouth Meeting	PA	—	1,104	4,627	1,277		1,104	5,904	7,008	2,929	1984	1996	40
2260 Butler Pike	Plymouth Meeting	PA	—	661	2,727	1,198		662	3,924	4,586	1,710	1984	1996	40
120 West Germantown Pike	Plymouth Meeting	PA	—	685	2,773	631		685	3,404	4,089	1,481	1984	1996	40
140 West Germantown Pike	Plymouth Meeting	PA	—	481	1,976	318		481	2,294	2,775	1,096	1984	1996	40
351 Plymouth Road	Plymouth Meeting	PA	—	1,043	555	—		1,043	555	1,598	94	N/A	2000	40
150 Radnor Chester Road	Radnor	PA	—	11,925	36,986	12,838		11,897	49,852	61,749	12,855	1983	2004	29
One Radnor Corporate Center	Radnor	PA	—	7,323	28,613	22,241		7,323	50,854	58,177	10,296	1998	2004	29
201 King of Prussia Road	Radnor	PA	—	8,956	29,811	6,700		8,949	36,518	45,467	11,783	2001	2004	25

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Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
555 Lancaster Avenue	Radnor	PA	—	8,014	16,508	18,711		8,609	34,624	43,233	9,207	1973	2004	24
Four Radnor Corporate Center	Radnor	PA	—	5,406	21,390	11,350		5,705	32,441	38,146	9,291	1995	2004	30
Five Radnor Corporate Center	Radnor	PA	—	6,506	25,525	2,159		6,578	27,612	34,190	6,414	1998	2004	38
Three Radnor Corporate Center	Radnor	PA	—	4,773	17,961	2,361		4,792	20,303	25,095	5,259	1998	2004	29
Two Radnor Corporate Center	Radnor	PA	—	3,937	15,484	1,208		3,942	16,687	20,629	4,396	1998	2004	29
130 Radnor Chester Road	Radnor	PA	—	2,573	8,338	3,542		2,568	11,885	14,453	2,788	1983	2004	25
170 Radnor Chester Road	Radnor	PA	—	2,514	8,147	3,283		2,508	11,436	13,944	3,203	1983	2004	25
101 West Elm Street	W. Conshohocken	PA	—	6,251	25,209	3,010		6,252	28,218	34,470	4,845	1999	2005	40
1 West Elm Street	W. Conshohocken	PA	—	3,557	14,249	1,128		3,557	15,377	18,934	2,497	1999	2005	40
595 East Swedesford Road	Wayne	PA	—	2,729	10,917	2,072		2,729	12,989	15,718	2,939	1998	2003	40
575 East Swedesford Road	Wayne	PA	—	2,178	8,712	1,630		2,178	10,342	12,520	2,551	1985	2003	40
565 East Swedesford Road	Wayne	PA	—	1,872	7,489	1,785		1,872	9,274	11,146	2,208	1984	2003	40
585 East Swedesford Road	Wayne	PA	—	1,350	5,401	358		1,351	5,758	7,109	1,325	1998	2003	40
1336 Enterprise Drive	West Goshen	PA	—	731	2,946	47		731	2,993	3,724	1,275	1989	1997	40
PHILADELPHIA CBD
2970 Market Street	Philadelphia	PA	202,905	22,430	217,763	9,956		22,430	227,719	250,149	8,408	2010	2007	40
2929 Arch Street	Philadelphia	PA	—	—	208,570	18,366		—	226,936	226,936	55,716	2005	N/A	40
130 North 18th Street	Philadelphia	PA	—	14,496	107,736	10,054		14,473	117,813	132,286	28,639	1998	2004	23
100 North 18th Street	Philadelphia	PA	89,800	16,066	100,255	5,671		16,066	105,926	121,992	26,011	1988	2004	33
1717 Arch Street	Philadelphia	PA	—	—	98,188	3,346		—	101,534	101,534	7,383	1990	2010	40
2930 Chestnut Street	Philadelphia	PA	44,379	—	76,008	3,064		—	79,072	79,072	2,600	2010	N/A	40
3020 Market Street	Philadelphia	PA	—	—	21,417	20		—	21,437	21,437	277	1959	2011	26
101 - 103 Juniper Street	Philadelphia	PA	—	—	14,401	76		—	14,477	14,477	212	2010	2006	40
Philadelphia Marine Center	Philadelphia	PA	—	532	2,196	3,236		628	5,336	5,964	1,749	Various	1998	40
METROPOLITAN WASHINGTON, D.C.
11720 Beltsville Drive	Beltsville	MD	—	3,831	16,661	4,047		3,903	20,636	24,539	4,357	1987	2006	46
11700 Beltsville Drive	Beltsville	MD	—	2,808	12,081	339		2,863	12,365	15,228	2,033	1981	2006	46
11710 Beltsville Drive	Beltsville	MD	—	2,278	11,100	(769	)	2,322	10,288	12,610	1,578	1987	2006	46
6600 Rockledge Drive	Bethesda	MD	—	—	37,421	11,145		—	48,566	48,566	8,529	1981	2006	50
11740 Beltsville Drive	Bethesda	MD	—	198	870	42		203	908	1,111	146	1987	2006	46
12015 Lee Jackson Memorial Highway	Fairfax	VA	—	3,770	22,895	2,702		3,841	25,526	29,367	3,937	1985	2006	42
11781 Lee Jackson Memorial Highway	Fairfax	VA	—	3,246	19,836	(289	)	3,307	19,487	22,794	3,572	1982	2006	40
4401 Fair Lakes Court	Fairfax	VA	—	1,569	11,982	284		1,600	12,236	13,836	1,738	1988	2006	52
3141 Fairview Park Drive (d)	Falls Church	VA	22,000	5,918	40,981	8,917		7,081	48,736	55,817	6,499	1988	2006	51

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Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
2340 Dulles Corner Boulevard	Herndon	VA	—	16,345	65,379	18,370		16,129	83,965	100,094	17,616	1987	2006	40
13820 Sunrise Valley Drive	Herndon	VA	—	11,082	47,290	19,687		11,082	66,977	78,059	8,334	2007	N/A	40
2291 Wood Oak Drive	Herndon	VA	—	8,243	52,413	12,805		8,781	64,680	73,461	6,930	1999	2006	55
2355 Dulles Corner Boulevard	Herndon	VA	—	10,365	43,876	4,418		10,364	48,295	58,659	7,804	1988	2006	40
196/198 Van Buren Street	Herndon	VA	—	7,931	43,812	6,058		8,348	49,453	57,801	7,660	1991	2006	53
2251 Corporate Park Drive	Herndon	VA	—	11,472	45,893	337		11,471	46,231	57,702	5,942	2000	2006	40
2411 Dulles Corner Park	Herndon	VA	—	7,279	46,340	3,691		7,416	49,894	57,310	7,736	1990	2006	50
2121 Cooperative Way	Herndon	VA	—	5,598	38,639	1,330		5,794	39,772	45,566	4,593	2000	2006	54
13880 Dulles Corner Lane	Herndon	VA	—	7,236	39,213	(1,132	)	7,373	37,943	45,316	4,816	1997	2006	55
2201 Cooperative Way	Herndon	VA	—	4,809	34,093	(678	)	4,809	33,416	38,225	3,936	1990	2006	54
13825 Sunrise Valley Drive	Herndon	VA	—	3,794	19,365	(851	)	3,865	18,443	22,308	2,480	1989	2006	46
1676 International Drive	Mclean	VA	61,976	18,437	97,538	1,650		18,785	98,840	117,625	13,100	1999	2006	55
8260 Greensboro Drive	Mclean	VA	32,906	7,952	33,964	242		8,103	34,055	42,158	4,509	1980	2006	52
1880 Campus Commons Drive	Reston	VA	—	6,164	28,114	1,714		6,281	29,711	35,992	3,636	1985	2006	52
2273 Research Boulevard	Rockville	MD	—	5,167	31,110	3,179		5,237	34,219	39,456	6,197	1999	2006	45
2275 Research Boulevard	Rockville	MD	—	5,059	29,668	2,372		5,154	31,945	37,099	5,358	1990	2006	45
2277 Research Boulevard	Rockville	MD	—	4,649	26,952	823		4,733	27,690	32,423	4,304	1986	2006	45
1900 Gallows Road	Vienna	VA	—	7,797	47,817	2,978		7,944	50,648	58,592	6,300	1989	2006	52
8521 Leesburg Pike	Vienna	VA	—	4,316	30,885	(1,004	)	4,397	29,799	34,196	4,022	1984	2006	51
NEW JERSEY/DELAWARE
457 Haddonfield Road	Cherry Hill	NJ	11,175	2,142	9,120	853		2,142	9,973	12,115	4,138	1990	1996	40
220 Lake Drive East	Cherry Hill	NJ	—	2,144	8,798	863		2,144	9,661	11,805	2,799	1988	2001	40
200 Lake Drive East	Cherry Hill	NJ	—	2,069	8,275	1,244		2,068	9,520	11,588	2,559	1989	2001	40
210 Lake Drive East	Cherry Hill	NJ	—	1,645	6,579	1,332		1,645	7,911	9,556	2,222	1986	2001	40
6 East Clementon Road	Gibbsboro	NJ	—	1,345	5,366	682		1,345	6,048	7,393	2,303	1980	1997	40
20 East Clementon Road	Gibbsboro	NJ	—	769	3,055	582		768	3,638	4,406	1,425	1986	1997	40
10 Foster Avenue	Gibbsboro	NJ	—	244	971	118		244	1,089	1,333	450	1983	1997	40
7 Foster Avenue	Gibbsboro	NJ	—	231	921	16		231	937	1,168	373	1983	1997	40
50 East Clementon Road	Gibbsboro	NJ	—	114	964	3		114	967	1,081	383	1986	1997	40
2 Foster Avenue	Gibbsboro	NJ	—	185	730	16		185	746	931	297	1974	1997	40
4 Foster Avenue	Gibbsboro	NJ	—	183	726	5		182	732	914	290	1974	1997	40
1 Foster Avenue	Gibbsboro	NJ	—	93	364	76		93	440	533	185	1972	1997	40
5 U.S. Avenue	Gibbsboro	NJ	—	21	81	3		21	84	105	33	1987	1997	40
5 Foster Avenue	Gibbsboro	NJ	—	9	32	26		9	58	67	23	1968	1997	40

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BRANDYWINE REALTY TRUST AND BRANDYWINE OPERATING PARTNERSHIP, L.P.

Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
1009 Lenox Drive	Lawrenceville	NJ	—	4,876	19,284	4,373		5,118	23,415	28,533	9,039	1989	1998	40
989 Lenox Drive	Lawrenceville	NJ	—	3,701	14,802	1,420		3,850	16,073	19,923	3,610	1984	2003	40
997 Lenox Drive	Lawrenceville	NJ	—	2,410	9,700	4,442		2,540	14,012	16,552	4,781	1987	1998	40
2000 Lenox Drive	Lawrenceville	NJ	—	2,291	12,221	1,975		2,684	13,803	16,487	3,499	2000	2000	40
993 Lenox Drive	Lawrenceville	NJ	—	2,811	17,996	(4,369	)	2,960	13,478	16,438	5,196	1985	1998	40
1200 Lenox Drive	Lawrenceville	NJ	—	1,071	12,967	1,238		1,071	14,205	15,276	1,846	2007	N/A	40
100 Lenox Drive	Lawrenceville	NJ	—	—	—	12,103		1,134	10,969	12,103	1,815	1977	1999	40
1000 Lenox Drive	Lawrenceville	NJ	—	1,174	4,696	2,180		1,244	6,806	8,050	2,677	1982	2002	40
1120 Executive Boulevard	Marlton	NJ	—	2,074	8,415	1,804		2,074	10,219	12,293	4,200	1987	1997	40
Two Eves Drive	Marlton	NJ	—	818	3,461	178		819	3,638	4,457	1,575	1987	1997	40
Five Eves Drive	Marlton	NJ	—	703	2,819	511		703	3,330	4,033	1,392	1986	1997	40
Four B Eves Drive	Marlton	NJ	—	588	2,369	361		589	2,729	3,318	1,180	1987	1997	40
Four A Eves Drive	Marlton	NJ	—	539	2,168	136		538	2,305	2,843	1,011	1987	1997	40
308 Harper Drive	Moorestown	NJ	—	1,643	6,663	1,070		1,644	7,732	9,376	2,685	1976	1998	40
304 Harper Drive	Moorestown	NJ	—	657	2,674	359		657	3,033	3,690	1,161	1975	1998	40
700 East Gate Drive	Mt. Laurel	NJ	—	3,569	14,436	2,122		3,568	16,559	20,127	6,205	1984	1998	40
10000 Midlantic Drive	Mt. Laurel	NJ	—	3,206	12,857	1,473		3,206	14,330	17,536	6,306	1990	1997	40
15000 Midlantic Drive	Mt. Laurel	NJ	—	3,061	12,254	1,070		3,061	13,324	16,385	5,351	1991	1997	40
1000 Atrium Way	Mt. Laurel	NJ	—	2,061	8,180	3,583		2,062	11,762	13,824	4,788	1989	1997	40
1000 Howard Boulevard	Mt. Laurel	NJ	—	2,297	9,288	1,378		2,297	10,666	12,963	4,294	1988	1997	40
2000 Midlantic Drive	Mt. Laurel	NJ	—	2,202	8,823	1,905		2,203	10,727	12,930	3,953	1989	1997	40
701 East Gate Drive	Mt. Laurel	NJ	—	1,736	6,877	1,277		1,736	8,154	9,890	2,843	1986	1998	40
307 Fellowship Drive	Mt. Laurel	NJ	—	1,565	6,342	1,295		1,564	7,638	9,202	2,658	1981	1998	40
9000 Midlantic Drive	Mt. Laurel	NJ	—	1,472	5,895	1,785		1,471	7,681	9,152	2,608	1989	1997	40
305 Fellowship Drive	Mt. Laurel	NJ	—	1,421	5,768	1,440		1,421	7,208	8,629	3,050	1980	1998	40
309 Fellowship Drive	Mt. Laurel	NJ	—	1,518	6,154	564		1,518	6,718	8,236	2,472	1982	1998	40
303 Fellowship Drive	Mt. Laurel	NJ	—	1,493	6,055	567		1,493	6,622	8,115	2,441	1979	1998	40
1000 Bishops Gate	Mt. Laurel	NJ	—	934	6,287	427		934	6,714	7,648	1,755	2005	2000	40
161 Gaither Drive	Mt. Laurel	NJ	—	1,016	4,064	818		1,016	4,882	5,898	1,578	1987	2001	40
4000 Midlantic Drive	Mt. Laurel	NJ	—	714	5,085	(1,403	)	714	3,682	4,396	1,810	1998	1997	40
815 East Gate Drive	Mt. Laurel	NJ	—	636	2,584	253		636	2,837	3,473	1,092	1986	1998	40
817 East Gate Drive	Mt. Laurel	NJ	—	611	2,426	360		612	2,785	3,397	1,096	1986	1998	40
400 Commerce Drive	Newark	DE	—	2,528	9,220	1,180		2,528	10,400	12,928	3,000	1997	2002	40
200 Commerce Drive	Newark	DE	—	911	4,414	1,018		911	5,432	6,343	1,676	1998	2002	40
100 Commerce Drive	Newark	DE	—	1,160	4,633	454		1,159	5,088	6,247	2,116	1989	1997	40

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Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

							Gross Amount at Which Carried
				Initial Cost			December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition	Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
Main Street - Plaza 1000	Voorhees	NJ	—	2,732	10,942	3,446	2,732	14,388	17,120	6,143	1988	1997	40
Main Street - Piazza	Voorhees	NJ	—	696	2,802	60	696	2,862	3,558	1,233	1990	1997	40
Main Street - Promenade	Voorhees	NJ	—	531	2,052	363	531	2,415	2,946	916	1988	1997	40
920 North King Street	Wilmington	DE	—	6,141	21,140	1,232	6,142	22,371	28,513	6,432	1989	2004	30
300 Delaware Avenue	Wilmington	DE	—	6,368	13,739	2,942	6,369	16,680	23,049	5,121	1989	2004	23
Two Righter Parkway	Wilmington	DE	—	2,802	11,217	5,255	2,803	16,471	19,274	2,361	1987	2001	40
One Righter Parkway	Wilmington	DE	—	2,545	10,195	4,773	2,546	14,967	17,513	7,070	1989	1996	40
RICHMOND
4364 South Alston Avenue	Durham	NC	—	1,622	6,419	892	1,580	7,353	8,933	2,625	1985	1998	40
4805 Lake Brooke Drive	Glen Allen	VA	—	1,640	6,567	1,373	1,640	7,940	9,580	3,220	1996	1998	40
Overlook II	Glen Allen	VA	—	791	4,503	62	790	4,565	5,355	188	2000	2011	40
Overlook I	Glen Allen	VA	—	791	3,976	93	790	4,069	4,859	181	1998	2011	40
2812 Emerywood Parkway	Henrico	VA	—	1,069	4,281	1,043	1,069	5,324	6,393	2,226	1980	1998	40
300 Arboretum Place	Richmond	VA	—	5,450	21,892	3,528	5,450	25,420	30,870	9,639	1988	1998	40
7501 Boulders View Drive	Richmond	VA	—	4,669	19,699	1,952	4,925	21,395	26,320	2,510	1990	2007	40
7300 Beaufont Springs Drive	Richmond	VA	—	4,672	19,689	670	4,922	20,109	25,031	2,256	2000	2007	40
6800 Paragon Place	Richmond	VA	—	4,552	18,414	1,549	4,552	19,963	24,515	3,110	1986	2006	40
6802 Paragon Place	Richmond	VA	—	2,917	11,454	2,469	2,917	13,923	16,840	3,638	1989	2002	40
1025 Boulders Parkway	Richmond	VA	—	2,574	11,297	1,146	2,825	12,192	15,017	1,364	1994	2007	40
2100-2116 West Laburnam Avenue	Richmond	VA	—	2,482	8,846	3,073	2,482	11,919	14,401	4,497	1976	1998	40
7401 Beaufont Springs Drive	Richmond	VA	—	2,349	10,396	717	2,599	10,863	13,462	1,201	1998	2007	40
7325 Beaufont Springs Drive	Richmond	VA	—	2,344	10,377	502	2,594	10,629	13,223	1,307	1999	2007	40
6806 Paragon Place	Richmond	VA	—	—	10,288	827	403	10,712	11,115	2,573	2007	2005	40
9011 Arboretum Parkway	Richmond	VA	—	1,857	7,702	832	1,856	8,535	10,391	3,333	1991	1998	40
2511 Brittons Hill Road	Richmond	VA	—	1,202	4,820	1,472	1,202	6,292	7,494	2,472	1987	1998	40
9100 Arboretum Parkway	Richmond	VA	—	1,362	5,489	565	1,362	6,054	7,416	2,298	1988	1998	40
100 Gateway Centre Parkway	Richmond	VA	—	391	5,410	885	391	6,295	6,686	1,878	2001	1998	40
9200 Arboretum Parkway	Richmond	VA	—	985	3,973	1,353	984	5,327	6,311	1,819	1988	1998	40
9210 Arboretum Parkway	Richmond	VA	—	1,110	4,474	486	1,110	4,960	6,070	1,839	1988	1998	40
2201-2245 Tomlynn Street	Richmond	VA	—	1,020	4,067	447	1,019	4,515	5,534	1,620	1989	1998	40
9211 Arboretum Parkway	Richmond	VA	—	582	2,433	252	582	2,685	3,267	1,048	1991	1998	40
2212-2224 Tomlynn Street	Richmond	VA	—	502	2,014	353	502	2,367	2,869	779	1985	1998	40
2244 Dabney Road	Richmond	VA	—	550	2,203	37	550	2,240	2,790	837	1993	1998	40
2248 Dabney Road	Richmond	VA	—	512	2,049	223	512	2,272	2,784	854	1989	1998	40
2221-2245 Dabney Road	Richmond	VA	—	530	2,123	80	529	2,204	2,733	804	1994	1998	40
2277 Dabney Road	Richmond	VA	—	507	2,034	61	507	2,095	2,602	751	1986	1998	40
2246 Dabney Road	Richmond	VA	—	455	1,822	18	455	1,840	2,295	682	1987	1998	40

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BRANDYWINE REALTY TRUST AND BRANDYWINE OPERATING PARTNERSHIP, L.P.

Real Estate and Accumulated Depreciation — December 31, 2011

(in thousands)

								Gross Amount at Which Carried
				Initial Cost				December 31, 2011
Property Name	City	State	Encumberances at December 31, 2011 (a)	Land	Building and Improvements	Net Improvements (Retirements) Since Acquisition		Land	Building and Improvements	Total (b)	Accumulated Depreciation at December 31, 2011 (c)	Year of Construction	Year Acquired	Depreciable Life
2161-2179 Tomlynn Street	Richmond	VA	—	423	1,695	68		423	1,763	2,186	640	1985	1998	40
2251 Dabney Road	Richmond	VA	—	387	1,552	138		387	1,690	2,077	636	1983	1998	40
2256 Dabney Road	Richmond	VA	—	356	1,427	273		356	1,700	2,056	676	1982	1998	40
2130-2146 Tomlynn Street	Richmond	VA	—	353	1,416	213		353	1,629	1,982	681	1988	1998	40
2120 Tomlynn Street	Richmond	VA	—	281	1,125	204		280	1,330	1,610	475	1986	1998	40
2240 Dabney Road	Richmond	VA	—	264	1,059	11		264	1,069	1,333	396	1984	1998	40
Boulders Land	Richmond	VA	—	1,256	—	3		1,259	—	1,259	—	N/A	2007	N/A
CALIFORNIA
5780 & 5790 Fleet Street	Carlsbad	CA	—	7,073	22,907	3,435		7,516	25,899	33,415	3,596	1999	2006	55
5900 & 5950 La Place Court	Carlsbad	CA	—	3,706	11,185	2,090		3,955	13,026	16,981	2,090	1988	2006	48
5963 La Place Court	Carlsbad	CA	—	2,824	9,413	1,662		2,999	10,900	13,899	1,647	1987	2006	55
5973 Avenida Encinas	Carlsbad	CA	—	2,121	8,361	1,383		2,256	9,609	11,865	1,803	1986	2006	45
2035 Corte Del Nogal	Carlsbad	CA	—	3,261	6,077	1,250		3,499	7,089	10,588	1,484	1991	2006	39
1200 Concord Avenue	Concord	CA	—	6,395	24,664	235		6,515	24,778	31,293	4,215	1984	2006	34
1220 Concord Avenue	Concord	CA	—	6,476	24,966	(332	)	6,476	24,634	31,110	3,911	1984	2006	34
155 Grand Avenue	Oakland	CA	—	13,556	54,266	4,482		13,555	58,749	72,304	7,863	1990	2007	40
Two Kaiser Plaza	Oakland	CA	—	7,841	—	—		7,841	—	7,841	—	N/A	2006	N/A
Oakland Lot B	Oakland	CA	—	4,342	—	—		4,342	—	4,342	—	N/A	2006	N/A
16870 W Bernardo Drive	San Diego	CA	—	2,979	15,896	1,766		3,154	17,487	20,641	2,562	2002	2006	56
AUSTIN
1250 Capital of Texas Hwy South	Austin	TX	—	5,152	37,928	5,826		5,247	43,659	48,906	7,063	1984	2006	52
1301 Mopac Expressway	Austin	TX	—	4,188	41,229	(595	)	4,251	40,571	44,822	5,732	2001	2006	55
1221 Mopac Expressway	Austin	TX	—	3,290	31,548	4,228		3,369	35,696	39,065	3,900	2001	2006	55
1601 Mopac Expressway	Austin	TX	—	3,538	34,346	220		3,605	34,499	38,104	4,390	2000	2006	54
1501 South Mopac Expressway	Austin	TX	—	3,698	34,912	(2,202	)	3,767	32,640	36,407	3,889	1999	2006	53
3711 South Mopac Expressway - II	Austin	TX	—	1,688	19,229	4,316		1,688	23,545	25,233	3,660	2007	2006	40
3711 South Mopac Expressway - I	Austin	TX	—	1,688	21,011	2,451		1,688	23,462	25,150	2,262	2007	2006	40
	Total:		$ 512,391	$ 666,690	$ 3,603,754	$ 522,640		$ 677,891	$ 4,115,189	$ 4,793,080	$ 865,710

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(a) Excludes the effect of any net interest premium/(discount).

(b) Reconciliation of Real Estate:

The following table reconciles the real estate investments from January 1, 2009 to December 31, 2011 (in thousands):

Balance at beginning of year	2011 — $ 4,834,111		2010 — $ 4,512,618		2009 — $ 4,608,320
Additions:
Acquisitions	31,454		102,475		—
Capital expenditures	133,550		336,281		80,506
Less:
Dispositions	(206,035	)	(117,263	)	(176,208	)
Balance at end of year	$ 4,793,080		$ 4,834,111		$ 4,512,618

The aggregate cost for federal income tax purposes is $4.5 billion as of December 31, 2011

The following table reconciles the accumulated depreciation on real estate investments from January 1, 2009 to December 31, 2011 (in thousands):

Balance at beginning of year	2011 — $ 776,078		2010 — $ 716,957		2009 — $ 639,688
Additions:
Depreciation expense — continuing operations	157,691		133,740		141,309
Depreciation expense — discontinued operations	1,185		1,554		6,494
Less:
Dispositions	(69,244	)	(76,173	)	(70,534	)
Balance at end of year	$ 865,710		$ 776,078		$ 716,957

(d) This property was contributed to an unconsolidated real estate venture, however, the Company will continue to consolidate this property due to its continuing involvement in this property resulting from its ongoing lease at this property and its 50% ownership interest in the venture. Please see Note 3 to the consolidated financial financial statements for additional information.

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BRANDYWINE REALTY TRUST Annual Report 2011

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BRANDYWINE REALTY TRUST — Annual Report 2011

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