DIGITAL REALTY TRUST, INC. — Director's Dealing 2012

May 4, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Digital Realty Trust, Inc. (DLR)
CIK: 0001297996
Period of Report: 2012-05-02

Reporting Person: Mills Joshua Ananda (Sr. VP and General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-02	Common Stock	M	6687	—	Acquired	6687	Direct
2012-05-02	Common Stock	S	6687	$75.67	Disposed	0	Direct
2012-05-02	Common Stock	M	3313	—	Acquired	3313	Direct
2012-05-02	Common Stock	S	3313	$75.67	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-02	Long-Term Incentive Units	$	M	6687	Disposed		Common Stock (6687)	Direct
2012-05-02	Class C Units	$	M	3313	Disposed		Common Stock (3313)	Direct

Footnotes

F1: The reporting person converted long-term incentive 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 Common Units for 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: 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.

F3: Represents average sale price; exact sale prices range between $75.57 and $75.77.

F4: The reporting person converted Class C Profits Interest Units ("Class C Units") into Common Units of the Operating Partnership and subsequently redeemed the Common Units for shares of the common stock of the Issuer, all in accordance with the requirements of the Limited Partnership Agreement of the Operating Partnership.

F5: Class C Units are membership interests in the Operating Partnership of which the Issuer is the general partner. Vested 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.

F6: 1 for 1.

F7: N/A