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

May 17, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Digital Realty Trust, Inc. (DLR)
CIK: 0001297996
Period of Report: 2010-05-13

Reporting Person: Stein A William (CFO and CIO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-13	Common Stock	M	1000	—	Acquired	1000	Direct
2010-05-13	Common Stock	S	1000	$60.00	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-05-13	Class C Profits Interest Units	$	M	1000	Disposed		Common Stock (1000)	Direct

Footnotes

F1: A. William Stein converted 1,000 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 1,000 Common Units for 1,000 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: 1 for 1.

F4: N/A