FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Peterson Scott E   2. Issuer Name and Ticker or Trading Symbol Digital Realty Trust, Inc. [DLR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Acquisitions Officer (Last) (First) (Middle) 560 MISSION STREET, SUITE 2900 3. Date of Earliest Transaction (Month/Day/Year) 02/14/2012 (Street) SAN FRANCISCO, CA 94105 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Long-Term Incentive Units (1)

(2)

02/14/2012

A

7,181

(3)

(4)

Common Stock

7,181

$ 0

82,877

D

Long-Term Incentive Units (1) (5)

(2)

02/14/2012

A

11,298

(5)

(4)

Common Stock

11,298

$ 0

94,175

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Peterson Scott E 560 MISSION STREET, SUITE 2900 SAN FRANCISCO, CA 94105			Chief Acquisitions Officer

Signatures

/s/ Barbara Polster, attorney-in-fact		02/16/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Twenty percent (20%) of these units will vest on February 27, 2013, an additional 20% will vest on February 27, 2014, an additional 30% will vest on February 27, 2015 and the remaining 30% will vest on February 27, 2016.
(2)	1 for 1.
(3)	Reflects long-term incentive units initially granted on February 10, 2011 that were subject to a performance-based vesting condition, which performance-based vesting condition was satisfied in full on February 14, 2012. These long-term incentive units are also subject to time-based vesting, pursuant to which 20% of the units will vest on February 27, 2012, 20% will vest on February 27, 2013, 30% will vest on February 27, 2014 and 30% will vest on February 27, 2015.
(4)	N/A
(5)	Reflects long-term incentive units initially granted on February 23, 2010 that were subject to a performance-based vesting condition, which performance-based vesting condition was satisfied in full on February 10, 2011. These long-term incentive units are also subject to time-based vesting, pursuant to which 20% of the units will vest on February 23, 2011, 20% will vest on February 23, 2012, 30% will vest on February 23, 2013 and 30% will vest on February 23, 2014.
Remarks: This statement of changes in beneficial ownership ("Form 4") of securities of the Issuer is being filed to report a transaction(s) that is also being reported concurrently on a Form 4 for the Operating Partnership.  The change(s) in beneficial ownership reported on this Form 4 for the Issuer are as a result of the same transaction(s) reported in the Form 4 for the Operating Partnership.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

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