DIGITAL REALTY TRUST, INC. — Director's Dealing 2010

May 6, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Digital Realty Trust, Inc. (DLR)
CIK: 0001297996
Period of Report: 2010-05-05

Reporting Person: Crosby Christopher James JR (SVP, Sales & Tech. Services)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-05	Common Stock	M	35296	—	Acquired	35296	Direct
2010-05-05	Common Stock	M	10580	—	Acquired	45876	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-05	Class C Profits Interest Units	$	M	35296	Disposed		Common Stock (35296)	Direct
2010-05-05	Long-Term Incentive Units	$	M	10580	Disposed		Common Stock (10580)	Direct
2010-05-05	Long-Term Incentive Units	$	G	11469	Disposed		Common Stock (11469)	Direct

Footnotes

F1: Christopher Crosby converted 35,296 Class C Profits Interest Units into common limited partnership units ("Common Units") of Digital Realty Trust, L.P., a Maryland Limited Partnership (the "Operating Partnership"), and subsequently redeemed the 35,296 Common Units for 35,296 shares of the common stock of Digital Realty Trust, Inc. (the "Issuer"), all in accordance with the requirements of the Limited Partnership Agreement of the Operating Partnership.

F2: Class C Units are membership interests in the Operating Partnership of which the Issuer is the general partner. Class C Units that have satisfied the performance condition and achieved full parity with Common Units receive the same quarterly distributions as Common Units, and may be converted into an equal number of Common Units on a one-for-one basis at any time. Common Units will be redeemable for cash based on the fair market value of an equivalent number of shares of the Issuer's common stock, or, at the election of the Issuer, for an equal number of shares of the Issuer's common stock. The Class C Units have achieved full parity with Common Units.

F3: Christopher Crosby converted 10,580 long-term incentive units into Common Units of the Operating Partnership, and subsequently redeemed the 10,580 Common Units for 10,580 shares of the common stock of the Issuer, all in accordance with the requirements of the Limited Partnership Agreement of the Operating Partnership.

F4: Long-term incentive units are profits interest units in the Operating Partnership. Vested profits interest units may be converted into an equal number of Common Units in the Operating Partnership on a one-for-one basis at any time. Common Units are redeemable for cash based on the fair market value of an equivalent number of shares of the Issuer's common stock, or, at the election of the Issuer, for an equal number of shares of the Issuer's common stock, subject to adjustment in the event of stock splits, stock dividends, issuance of stock rights, specified extraordinary distributions or similar events.

F5: 1 for 1.

F6: N/A