8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 25, 2010

DIGITAL REALTY TRUST, INC.

(Exact name of registrant as specified in its charter)

Maryland	001-32336	26-0081711
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

560 Mission Street, Suite 2900 San Francisco, California	94105
(Address of principal executive offices)	(Zip Code)

(415) 738-6500

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.02 Results of Operations and Financial Condition.

The information in this Item 2.02 of this Current Report is also being furnished under Item 7.01—“Regulation FD Disclosure” of Form 8-K. Such information, including the exhibits attached hereto, is furnished pursuant to Item 2.02 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or the Exchange Act, or otherwise subject to the liabilities of that Section. The information in this Current Report on Form 8-K shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities Act, or the Exchange Act regardless of any general incorporation language in such filing.

On February 25, 2010, we issued a press release announcing our financial results for the quarter ended December 31, 2009. The text of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

On February 25, 2010, we posted certain supplemental operating and financial data on our website located at www.digitalrealtytrust.com. That supplemental operating and financial data is attached hereto as Exhibit 99.2 and is incorporated by reference herein.

Item 7.01 Regulation FD Disclosure.

The information in this Item 7.01 of this Current Report is also being furnished under Item 2.02—“Results of Operations and Financial Condition” of Form 8-K. Such information, including the exhibits attached hereto, is furnished pursuant to Item 7.01 and shall not be deemed “filed” for any purpose, including for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that Section. The information in this Current Report on Form 8-K shall not be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act regardless of any general incorporation language in such filing.

On February 25, 2010, we issued a press release announcing our financial results for the quarter ended December 31, 2009. The text of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

On February 25, 2010, we posted certain supplemental operating and financial data on our website located at www.digitalrealtytrust.com. That supplemental operating and financial data is attached hereto as Exhibit 99.2 and is incorporated by reference herein.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.	Description
99.1	Press Release dated February 25, 2010.
99.2	Supplemental Operating and Financial Data posted February 25, 2010.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Digital Realty Trust, Inc.
By:	/s/    JOSHUA A. MILLS
	Joshua A. Mills
	General Counsel and Assistant Secretary

Dated: February 25, 2010

EXHIBIT INDEX

Exhibit No.	Description
99.1	Press Release dated February 25, 2010.
99.2	Supplemental Operating and Financial Data posted February 25, 2010.

EX-99.1

Exhibit 99.1

FOR IMMEDIATE RELEASE

For Additional Information:

A. William Stein	Pamela Matthews
Chief Financial Officer and	Investor/Analyst Information
Chief Investment Officer	Digital Realty Trust, Inc.
Digital Realty Trust, Inc.	+1 (415) 738-6500
+1 (415) 738-6500

DIGITAL REALTY TRUST, INC. REPORTS FOURTH QUARTER AND FULL YEAR 2009 RESULTS

Strong performance yields 13% year-over-year growth in FFO of $2.93 per diluted share and unit

Highlights:

• Reported FFO of $2.93 per diluted share and unit for the year ended December 31, 2009, up 13.1% from the year ended December 31, 2008;

• Reported FFO of $0.79 per diluted share and unit for the fourth quarter, up 6.8% from the third quarter of 2009;

• Reported net income for the year ended December 31, 2009 of $91.2 million and net income available to common stockholders of $47.3 million, or $0.61 per diluted share;

• Completed six property acquisitions totaling 1.4 million square feet for $251.6 million in 2009, including the remaining noncontrolling interest in a fully leased facility in Silicon Valley from the Company’s joint venture partner;

• Subsequent to year-end, in January 2010 completed the acquisition of a three-property portfolio totaling approximately 550,000 square feet located in New England for $375 million;

• Commenced leases on approximately 757,000 square feet during 2009 at an average annualized GAAP rent of approximately $106 per square foot, including non technical space;

• Signed leases on approximately 434,000 square feet in 2009 at an average annualized GAAP rent of approximately $127 per square foot, including non technical space;

• Increased quarterly common stock dividend by 7% for the first quarter 2010 to $0.48 per share; by 25% for the fourth quarter 2009 to $0.45 per share, and by 9% for the third quarter 2009 to $0.33 per share;

• Obtained BBB/Baa2 stable outlook investment grade debt ratings in November from the three major rating agencies;

• Completed a £23.8 million secured debt financing in October and a €30.0 million secured debt financing in December;

560 MISSION STREET, SUITE 2900

SAN FRANCISCO, CA 94105

415-738-6500

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• Entered into equity distribution agreements in December 2009 and January 2010 under which the Company can, subject to market conditions, issue and sell up to $400 million of its common stock;

• Subsequent to year-end, in January 2010 completed a $500 million unsecured 10-year notes offering with an interest rate of 5.875% per annum yielding 6.105% and three draws on its Prudential shelf facility during January and February 2010 totaling $117.0 million with a weighted average interest rate of 5.06% per annum and maturity of 5.8 years; and

• Raised 2010 FFO guidance range to $3.18 to $3.30 per diluted share and unit, increasing the midpoint by $0.04 per share.

San Francisco, Calif. (February 25, 2010) – Digital Realty Trust, Inc. (NYSE: DLR), the leading owner and manager of corporate and Internet gateway datacenter facilities, today announced financial results for its fourth quarter and full year ended December 31, 2009. Funds from operations (“FFO”) on a diluted basis was $80.1 million in the fourth quarter of 2009, or $0.79 on a diluted per share and unit basis, up 6.8% from $0.74 per diluted share and unit in the previous quarter; and up 5.3% from $0.75 per diluted share and unit in the fourth quarter of 2008. For the year ended December 31, 2009, FFO was $289.9 million, or $2.93 on a per diluted share and unit basis, up 13.1% from $2.59 per diluted share and unit in 2008.

“The FFO of $0.79 per diluted share and unit for the fourth quarter of 2009 includes approximately $0.01 of additional FFO from certain items that do not represent ongoing revenue streams. Similarly, fourth quarter 2008 FFO of $0.75 per diluted share and unit included approximately $0.07 per share of additional FFO from such items. When adjusted for these items in both quarters, fourth quarter 2009 FFO increased 14.7% over fourth quarter 2008 FFO,” commented A. William Stein, Chief Financial Officer and Chief Investment Officer of Digital Realty Trust. “After adjusting for such items for the full years 2009 and 2008, FFO was $2.92 per diluted share and unit, a 18.2% increase over 2008 FFO of $2.47 per diluted share and unit.”

FFO is a supplemental non-GAAP performance measure used by the real estate industry to measure the operating performance of real estate investment trusts. FFO should not be considered as a substitute for net income determined in accordance with U.S. GAAP as a measure of financial performance. A reconciliation from U.S. GAAP net income available to common stockholders to FFO and a definition of FFO are included as an attachment to this press release.

Net income for the fourth quarter was $24.9 million, compared to $23.9 million for the third quarter of 2009 and $25.1 million for the fourth quarter of 2008. Net income available to common stockholders in the fourth quarter was $14.3 million or $0.18 per diluted share, compared to $12.4 million, or $0.16 per diluted share in the third quarter of 2009, and $13.8 million, or $0.19 per diluted share, in the fourth quarter of 2008. For the year ended December 31, 2009, net income was $91.2 million, up 34.3% over 2008 net income of $67.9 million. Net income available to common shareholders for the year was $47.3 million, or $0.61 per diluted share, up from $26.7 million, or $0.38 per diluted share in 2008.

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The Company reported total operating revenues of $169.8 million in the fourth quarter of 2009, up 15.4% from $147.1 million in the fourth quarter of 2008 and total operating revenue of $637.1 million for the year, up 20.8% from $527.4 million in 2008.

“By all accounts, Digital Realty Trust delivered an exceptionally strong performance in 2009. We successfully raised attractively priced capital to continue to fund our growth through our leasing and redevelopment program as well as by acquiring stabilized assets,” commented Michael F. Foust, Chief Executive Officer of Digital Realty Trust. “Furthermore, we were pleased to share this success directly with shareholders by increasing our dividend for three consecutive quarters, representing a total increase of approximately 45%.”

Acquisitions and Leasing Activity

On October 30, 2009, the Company acquired 1350 Duane Avenue and 3080 Raymond Street, two fully leased datacenter facilities totaling 185,000 square feet located adjacent to each other in Santa Clara, California. The purchase price of approximately $90.5 million includes the assumption of a $52.8 million secured mortgage.

On December 17, 2009, the Company acquired a fully leased, two-property datacenter portfolio consisting of four buildings and located at 45901 and 45905 Nokes Boulevard in Sterling Virginia, and 21561 and 21571 Beaumeade Circle as well as a parcel of land located at 21551 Beaumeade Circle in Ashburn, Virginia. The purchase price was approximately $63.3 million. The buildings total approximately 332,000 square feet with a parcel of land capable of supporting up to 140,000 square feet of new datacenter development. Including these properties and the remaining noncontrolling interest in a fully leased facility in Silicon Valley from the Company’s joint venture partner, the Company completed six property acquisitions totaling $251.6 million in 2009.

On January 22, 2010, the Company completed the acquisition of a three-property portfolio located in Massachusetts and Connecticut. The portfolio is approximately 98% leased and totals approximately 550,000 square feet. The purchase price was approximately $375 million.

As previously announced, for the year ended December 31, 2009, the Company commenced leases totaling approximately 757,000 square feet. This includes over 369,000 square feet of Turn-Key Datacenter^® space leased at an average annual GAAP rental rate of $177.00 per square foot, approximately 194,000 square feet of Powered Base Building^® space leased at an average annual GAAP rental rate of $59.00 per square foot, and approximately 194,000 square feet of non-technical space leased at an average annual GAAP rental rate of $17.00 per square foot.

For the quarter ended December 31, 2009, the Company commenced leases totaling approximately 91,000 square feet of space. This includes nearly 53,000 square feet of Turn-Key Datacenter^® space leased at an

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average annual GAAP rental rate of $173.00 per square foot, approximately 20,000 square feet of Powered Base Building^® space leased at an average annual GAAP rental rate of $29.00 per square foot, and approximately 18,000 square feet of non-technical space leased at an average annual GAAP rental rate of $22.00 per square foot.

For the year ended December 31, 2009, the Company signed leases totaling approximately 434,000 square feet. This includes approximately 332,000 square feet of Turn-Key Datacenter^® space leased at an average annual GAAP rental rate of $158.00 per square foot, over 35,000 square feet of Powered Base Building^® space leased at an average annual GAAP rental rate of $27.00 per square foot, and approximately 67,000 square feet of non-technical space leased at an average annual GAAP rental rate of $22.00 per square foot.

For the quarter ended December 31, 2009, the Company signed leases totaling approximately 156,000 square feet of space. This includes approximately 116,000 square feet of Turn-Key Datacenter space leased at an average annual GAAP rental rate of $126.00 per square foot, approximately 30,000 square feet of Powered Base Building space leased at an average annual GAAP rental rate of $26.00 per square foot, and approximately 10,000 square feet of non-technical space leased at an average annual GAAP rental rate of $31.00 per square foot.

The leasing results include all activity at the Company’s consolidated joint venture property.

For the year ended December 31, 2009, the Company signed lease renewals totaling approximately 1.3 million square feet, resulting in a 22.5% increase in GAAP rent for the leases renewed.

As of February 25, 2010, the Company’s portfolio comprises 84 properties, excluding one property held in an unconsolidated joint venture, consisting of 117 buildings totaling approximately 14.9 million rentable square feet, including 1.8 million square feet of space held for redevelopment. The portfolio is strategically located in 27 key markets throughout North America and Europe.

Balance Sheet Update

Total assets grew to approximately $3.7 billion at December 31, 2009 from $3.3 billion at December 31, 2008. Total debt increased to approximately $1.8 billion at December 31, 2009 from $1.4 billion at December 31, 2008. Stockholders’ equity was approximately $1.6 billion, up from $1.5 billion at December 31, 2008.

In December 2009 and January 2010, the Company entered into equity distribution agreements under which it can, subject to market conditions, issue and sell up to $400 million of its common stock. The Company intends to use the proceeds from the sale of shares to temporarily repay borrowings under its revolving credit facility, to acquire additional properties, to fund development and redevelopment opportunities and for general corporate

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purposes. As of February 24, 2010, the Company has generated net proceeds of approximately $53.5 million after payment of approximately $0.8 million of commissions to the sales agents from the issuance of approximately 1.1 million common shares at an average price of $50.54 per share.

Subsequent to the end of the year, in separate transactions, the Company closed the sale of $100.0 million on January 20, 2010 and $17.0 million on February 3, 2010 of its senior unsecured term notes under its Prudential shelf facility. The notes sold in January were issued in two series referred to as the series D and series E notes. The series D notes have a principal amount of $50.0 million, an interest-only rate of 4.57% per annum and a five-year maturity, and the series E notes have a principal amount of $50.0 million, an interest-only rate of 5.73% per annum and a seven-year maturity. The notes sold in February are referred to as the series F notes and have an interest-only rate of 4.50% per annum and a five-year maturity.

On January 28, 2010, the Company closed the issuance of $500 million in 10-year, senior unsecured notes with an interest rate of 5.875% per annum yielding 6.105%. The Company used the net proceeds from these transactions to temporarily repay borrowings under its revolving credit facility, to fund acquisitions and its development and redevelopment program, and for working capital.

“In 2009 we raised $620 million in capital from a variety of sources, which was used to fund the growth of the Company and retire approximately $151 million of debt,” added Mr. Stein. “As a result of these activities and our consistent approach to prudently managing our balance sheet, we achieved BBB/Baa2 investment grade debt ratings with a stable outlook from all three major rating agencies in November 2009. To date in 2010, we have raised an additional $670.5 million of attractively priced capital from various debt and equity markets activities, including our inaugural $500 million unsecured notes offering. As a result of our strong fourth quarter 2009 performance and subsequent investment and funding activities, we are revising our 2010 guidance.”

2010 Revised Outlook

FFO per diluted share and unit for the year ending December 31, 2010 is projected to be between $3.18 and $3.30. This guidance represents expected FFO growth of 8.5% to 12.6% over the 2009 FFO of $2.93 per diluted share and unit. A reconciliation of the range of 2010 projected net income to projected FFO follows:

	(Low - High)
Net income available to common stockholders per diluted share	$0.79 – 0.91
Add:
Real estate depreciation and amortization as adjusted for noncontrolling interest	$2.55
Less:
Dilutive impact of convertible stock and exchangeable debentures	$(0.16)
Projected FFO per diluted share	$3.18 – 3.30

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The 2010 guidance provided by Digital Realty Trust in this press release is based on the following assumptions as of February 25, 2010:

• Acquisitions of additional income producing properties totaling $150 million at average cap rate of 10%;

• Commencement of leases which will contribute $80 to $90 million of GAAP rental revenue on an annualized basis;

• POD Architecture Services^® revenue recognized between $7 to $10 million;

• Development and redevelopment capital expenditures of $440 to $475 million;

• Portfolio level capital expenditures of $50 million;

• Total G&A of $48 million; and

• Non-cash interest expense of approximately $4.2 million with respect to our 4.125% Exchangeable Senior Notes due 2026 as a result of accounting guidance for convertible debt instruments that may be settled in cash (or other assets) on conversion.

Investor Conference Call Details

Digital Realty Trust will hold a conference call today, Thursday, February 25, 2010 at 1:00 pm ET/10:00 am PT to discuss its fourth quarter and full year 2009 financial results and operating performance. The conference call will feature Chief Executive Officer, Michael Foust and Chief Financial Officer and Chief Investment Officer, A. William Stein. To participate in the live call, investors are invited to dial +1 (800) 762-8779 (for domestic callers) or +1 (480) 629-9771 (for international callers) and quote the conference ID #4198813 at least five minutes prior to start time. A live webcast of the call will be available via the Investors section of Digital Realty Trust’s website at www.digitalrealtytrust.com. Please go to the website at least 15 minutes early to register and download and install any necessary audio software. If you are unable to listen to the live conference call, a telephone and webcast replay will be available after 12:00 pm PT on Thursday, February 25, 2010 until 11:59 pm PT on Wednesday, March 3, 2010. The telephone replay can be accessed by dialing +1 (800) 406-7325 (for domestic callers) or +1 (303) 590-3030 (for international callers) and using the access code #4198813. A replay of the webcast will also be archived on Digital Realty Trust’s website.

About Digital Realty Trust, Inc.

Digital Realty Trust owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter^® and Powered Base Building^® datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and internet enterprises, to manufacturing and financial services. Digital Realty Trust’s 84 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 14.9 million square feet as of February 25, 2010, including 1.8 million square feet of space held for redevelopment, Digital Realty Trust’s portfolio is located in 27 markets throughout Europe and North America. Digital Realty Trust calculates occupancy and leased square footage for some of its properties

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based on factors in addition to contractually leased square feet, including available power, required support space and common area. For additional information, please visit Digital Realty Trust’s website at http://www.digitalrealtytrust.com.

Safe Harbor Statement

This press release contains forward-looking statements which are based on current expectations, forecasts and assumptions that involve risks and uncertainties that could cause actual outcomes and results to differ materially. Such forward-looking statements include statements related to the Company’s 2010 guidance, acquisitions expectations, lease commencement expectations, POD Architecture Services^® revenue expectations, development and redevelopment capital expenditure expectations, portfolio level capital expenditure expectations, total G&A expectations, expectations regarding the additional non-cash interest expense related to the accounting for certain convertible debt instruments and expectations regarding real estate depreciation and amortization expenses. These risks and uncertainties include, among others, the following: the impact of the ongoing deterioration in global economic, credit and market conditions; the downturn of local economic conditions in our geographic markets; decreases in information technology spending, including as a result of economic slowdowns or recession; adverse economic or real estate developments in our industry or the industry sectors that we sell to (including risks relating to decreasing real estate valuations and impairment charges); our dependence upon significant tenants; bankruptcy or insolvency of a major tenant or a significant number of smaller tenants; defaults on or non-renewal of leases by tenants; our failure to obtain necessary debt and equity financing; increased interest rates and operating costs; our failure to repay debt when due or our breach of covenants or other terms contained in our loan facilities and agreements; financial market fluctuations; changes in foreign currency exchange rates; our ability to manage our growth effectively; difficulty acquiring or operating properties in foreign jurisdictions; our failure to successfully operate acquired or redeveloped properties; risks related to joint venture investments, including as a result of our lack of control of such investments; delays or unexpected costs in development or redevelopment of properties; decreased rental rates or increased vacancy rates; increased competition or available supply of datacenter space; our inability to successfully develop and lease new properties and space held for redevelopment; difficulties in identifying properties to acquire and completing acquisitions; our inability to acquire off-market properties; our inability to comply with the rules and regulations applicable to public companies; our failure to maintain our status as a REIT; potential adverse changes to tax laws; restrictions on our ability to engage in certain business activities; environmental uncertainties and risks related to natural disasters; changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; and changes in real estate and zoning laws and increases in real property tax rates. For a further list and description of such risks and uncertainties, see the reports and other filings by the Company with the United States Securities and Exchange Commission, including the Company’s annual report on Form 10-K for the year ended December 31, 2008 and subsequent reports on Form 10-Q and Form 8-K. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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Digital Realty Trust, Inc.

Condensed Consolidated Income Statements

(in thousands, except share data)

(unaudited)

	Three Months Ended						Year Ended
	December 31, 2009			December 31, 2008			December 31, 2009			December 31, 2008
Operating Revenues:
Rental	$	136,425		$	111,398		$	510,772		$	404,559
Tenant reimbursements		32,501			30,136			125,308			107,503
Other		848			5,572			1,062			15,383
Total operating revenues		169,774			147,106			637,142			527,445
Operating Expenses:
Rental property operating and maintenance		46,086			43,664			176,238			151,147
Property taxes		8,349			5,767			36,004			31,102
Insurance		1,672			1,333			6,111			4,988
Depreciation and amortization		52,126			47,086			198,052			172,378
General and administrative		11,363			8,661			42,165			38,391
Other		94			26			783			1,084
Total operating expenses		119,690			106,537			459,353			399,090
Operating income		50,084			40,569			177,789			128,355
Other Income (Expenses):
Equity in (loss from) earnings of unconsolidated joint venture		(776	)		1,860			2,172			2,369
Interest and other income		17			591			753			2,106
Interest expense		(24,451	)		(17,747	)		(88,442	)		(63,621	)
Tax expense		23			(140	)		(1,038	)		(1,109	)
Loss from early extinguishment of debt		—			—			—			(182	)
Net Income		24,897			25,133			91,234			67,918
Net income attributable to noncontrolling interests		(510	)		(1,238	)		(3,572	)		(2,664	)
Net Income Attributable to Digital Realty Trust, Inc.		24,387			23,895			87,662			65,254
Preferred stock dividends		(10,101	)		(10,102	)		(40,404	)		(38,564	)
Net Income Available to Common Stockholders	$	14,286		$	13,793		$	47,258		$	26,690
Net income per share available to common stockholders:
Basic	$	0.19		$	0.19		$	0.62		$	0.39
Diluted	$	0.18		$	0.19		$	0.61		$	0.38
Weighted average shares outstanding:
Basic		76,649,529			73,011,453			75,950,370			68,829,267
Diluted		78,496,296			73,205,628			77,020,890			70,435,760

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Digital Realty Trust

Consolidated Balance Sheets

(in thousands)

	December 31, 2009			December 31, 2008
	(unaudited)
ASSETS
Investments in real estate
Properties:
Land	$	382,763		$	316,318
Acquired ground leases		2,767			2,733
Buildings and improvements		2,952,330			2,467,830
Tenant improvements		272,462			255,818
Investments in properties		3,610,322			3,042,699
Accumulated depreciation and amortization		(459,521	)		(302,960	)
Net investments in properties		3,150,801			2,739,739
Investment in unconsolidated joint venture		6,392			8,481
Net investments in real estate		3,157,193			2,748,220
Cash and cash equivalents		72,320			73,334
Accounts and other receivables, net		46,086			39,108
Deferred rent		145,550			99,957
Acquired above market leases, net		25,861			31,352
Acquired in place lease value and deferred leasing costs, net		224,216			222,389
Deferred financing costs, net		21,073			16,275
Restricted cash		37,810			45,470
Other assets		14,950			4,940
Total Assets	$	3,745,059		$	3,281,045
LIABILITIES AND EQUITY
Revolving credit facility	$	205,547		$	138,579
Unsecured senior notes		83,000			58,000
Mortgage loans		1,063,663			1,026,594
4.125% exchangeable senior debentures due 2026, net of discount		165,834			161,901
5.50% exchangeable senior debentures due 2029		266,400			—
Accounts payable and other accrued liabilities		151,229			171,176
Accrued dividends and distributions		37,004			26,092
Acquired below market leases, net		69,311			76,660
Security deposits and prepaid rents		68,270			46,967
Total Liabilities		2,110,258			1,705,969
Equity:
Stockholders’ equity		1,558,995			1,503,921
Noncontrolling interests		75,806			71,155
Total Equity		1,634,801			1,575,076
Total Liabilities and Equity	$	3,745,059		$	3,281,045

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Digital Realty Trust, Inc.

Reconciliation of Net Income Available to Common Stockholders to Funds From Operations (FFO) ⁽¹⁾

(in thousands, except per share and unit data)

(unaudited)

	Three Months Ended									Year Ended
	December 31, 2009			September 30, 2009			December 31, 2008			December 31, 2009			December 31, 2008
Net income available to common stockholders	$	14,286		$	12,406		$	13,793		$	47,258		$	26,690
Adjustments:
Noncontrolling interests in operating partnership		984			898			1,149			3,432			2,329
Real estate related depreciation and amortization (2)		51,821			50,163			46,890			196,971			171,657
Real estate related depreciation and amortization related to investment in unconsolidated joint venture		2,335			543			(286	)		4,382			2,339
FFO available to common stockholders and unitholders (3)	$	69,426		$	64,010		$	61,546		$	252,043		$	203,015
Basic FFO per share and unit	$	0.84		$	0.78		$	0.78		$	3.08		$	2.70
Diluted FFO per share and unit (3)	$	0.79		$	0.74		$	0.75		$	2.93		$	2.59
Weighted average common stock and units outstanding
Basic		82,196			82,094			79,096			81,715			75,160
Diluted (3)		102,078			101,492			91,123			98,963			87,811
(1)    Financial information for prior periods has been adjusted for the retroactive application of the following new accounting guidance adopted by the Company effective January 1, 2009: FASB ASC Subtopic 470-20, formerly Staff Position APB 14-1 “Accounting for Convertible Debt Instruments That May be Settled Upon Conversion (Including Partial Cash Settlement)”; FASB ASC Subtopic 810-10, formerly Statement of Financial Accounting Standard No. 160 “Noncontrolling Interests in Consolidated Financial Statements—An Amendment of ARB No. 51”. (2)    Real estate depreciation and amortization was computed as follows:
Depreciation and amortization per income statement		52,126			50,439			47,086			198,052			172,378
Non real estate depreciation		(305	)		(276	)		(196	)		(1,081	)		(721	)
	$	51,821		$	50,163		$	46,890		$	196,971		$	171,657
(3)    At December 31, 2009, we had 7,000 series C convertible preferred shares and 13,796 series D convertible preferred shares outstanding that were convertible into 3,657 common shares and 8,215 common shares, respectively. In addition, we had a balance of $266,400 of 5.50% exchangeable senior debentures that were exchangeable for 6,195 and 4,345 common shares on a weighted average basis for the three months and year ended December 31, 2009, respectively. See below for calculations of diluted FFO available to common stockholders and unitholders and weighted average common stock and units outstanding.
	Three Months Ended									Year Ended
	December 31, 2009			September 30, 2009			December 31, 2008			December 31, 2009			December 31, 2008
FFO available to common stockholders and unitholders	$	69,426		$	64,010		$	61,546		$	252,043		$	203,015
Add: Series C convertible preferred dividends		1,914			1,914			1,914			7,656			7,656
Add: Series D convertible preferred dividends		4,742			4,742			4,744			18,968			17,131
Add: 5.50% exchangeable senior debentures interest expense		4,050			4,050			—			11,248			—
FFO available to common stockholders and unitholders —   diluted	$	80,132		$	74,716		$	68,204		$	289,915		$	227,802
Weighted average common stock and units outstanding		82,196			82,094			79,096			81,715			75,160
Add: Effect of dilutive securities (excluding series C and D convertible preferred stock)		1,847			1,373			194			1,071			1,606
Add: Effect of dilutive series C convertible preferred stock		3,625			3,615			3,615			3,617			3,615
Add: Effect of dilutive series D convertible preferred stock		8,215			8,215			8,218			8,215			7,430
Add: Effect of dilutive 5.50% exchangeable senior debentures		6,195			6,195			—			4,345			—
Weighted average common stock and units outstanding —   diluted		102,078			101,492			91,123			98,963			87,811

Page 10

Note Regarding Funds From Operations

Digital Realty Trust calculates Funds from Operations, or FFO, in accordance with the standards established by the National Association of Real Estate Investment Trusts, or NAREIT. FFO represents net income (loss) available to common stockholders and unitholders (computed in accordance with U.S. GAAP), excluding gains (or losses) from sales of property, real estate related depreciation and amortization (excluding amortization of deferred financing costs) and after adjustments for unconsolidated partnerships and joint ventures. Management uses FFO as a supplemental performance measure because, in excluding real estate related depreciation and amortization and gains and losses from property dispositions, it provides a performance measure that, when compared year over year, captures trends in occupancy rates, rental rates and operating costs. Digital Realty Trust also believes that, as a widely recognized measure of the performance of REITs, FFO will be used by investors as a basis to compare our operating performance with that of other REITs. However, because FFO excludes depreciation and amortization and captures neither the changes in the value of our properties that result from use or market conditions, nor the level of capital expenditures and leasing commissions necessary to maintain the operating performance of our properties, all of which have real economic effect and could materially impact our financial condition and results from operations, the utility of FFO as a measure of our performance is limited. Other REITs may not calculate FFO in accordance with the NAREIT definition and, accordingly, our FFO may not be comparable to such other REITs’ FFO. Accordingly, FFO should be considered only as a supplement to net income as a measure of our performance.

Page 11

EX-99.2

Exhibit 99.2

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

	PAGE
Corporate Data
Corporate Information	4
Ownership Structure	5
Consolidated Financial Information
Key Quarterly Financial Data	6
Consolidated Balance Sheets	7
Consolidated Quarterly Statements of Operations	8
Funds From Operations and Adjusted Funds From Operations	9
Reconciliation of Earnings Before Interest, Taxes, Depreciation and Amortization and Financial Ratios	10
Net Operating Income (NOI) and Run-rate NOI for the three months ended December 31, 2009	11
Same Store and New Properties Consolidated Quarterly Statements of Operations	12
Same Store Operating Trend Summary	13
Consolidated Debt Analysis and Credit Facility	14
Revolving Credit Facility Commitments	15
Debt Maturities	16
Portfolio Data
Portfolio Summary	17
Properties Acquired	18
Occupancy Analysis	19
Major Tenants	21
Utility Power Capacity	22
Lease Expirations & Lease Distribution	23
Lease Expirations — By Property Type	24
Leasing Activity	26
Tenant Improvements and Leasing Commissions	27
Historical Capital Expenditures	28
Redevelopment Activity	29
Definitions
Management Statements on Non-GAAP Supplemental Measures	30

Page 2

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Statement Regarding Forward-Looking Statements

This supplemental package contains forward-looking statements within the meaning of the federal securities laws, including information related to run-rate net operating income. Such statements are based on management’s beliefs and assumptions made based on information currently available to management. Such statements are subject to risks, uncertainties and assumptions and are not guarantees of future performance and may be affected by known and unknown risks, trends, uncertainties and factors that are beyond our control. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those anticipated, estimated or projected. Some of the risks and uncertainties that may cause our actual results, performance or achievements to differ materially from those expressed or implied by forward-looking statements include, among others, the following:

• the impact of the ongoing deterioration in global economic, credit and market conditions;

• downturn of local economic conditions in our geographic markets;

• decreases in information technology spending, including as a result of economic slowdowns or recession;

• adverse economic or real estate developments in our industry or the industry sectors that we sell to (including risks relating to decreasing real estate valuations and impairment charges);

• our dependence upon significant tenants;

• bankruptcy or insolvency of a major tenant or a significant number of smaller tenants;

• defaults on or non-renewal of leases by tenants;

• our failure to obtain necessary debt and equity financing;

• increased interest rates and operating costs;

• our failure to repay debt when due or our breach of covenants or other terms contained in our loan facilities and agreements;

• financial market fluctuations;

• changes in foreign currency exchange rates;

• our inability to manage our growth effectively;

• difficulty acquiring or operating properties in foreign jurisdictions;

• our failure to successfully operate acquired or redeveloped properties;

• risks related to joint venture investments, including as a result of our lack of control of such investments;

• delays or unexpected costs in development or redevelopment of properties;

• decreased rental rates or increased vacancy rates;

• increased competition or available supply of data center space;

• inability to successfully develop and lease new properties and space held for redevelopment;

• difficulties in identifying properties to acquire and completing acquisitions;

• our inability to acquire off-market properties;

• our inability to comply with the rules and regulations applicable to public companies;

• our failure to maintain our status as a REIT;

• possible adverse changes to tax laws;

• restrictions on our ability to engage in certain business activities;

• environmental uncertainties and risks related to natural disasters;

• changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; and

• changes in real estate and zoning laws and increases in real property tax rates.

The risks included here are not exhaustive, and additional factors could adversely affect our business and financial performance. We discussed a number of additional material risks in our annual report on Form 10-K for the year ended December 31, 2008, and other filings with the Securities and Exchange Commission. Those risks continue to be relevant to our performance and financial condition. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for management to predict all such risk factors, nor can it assess the impact of all such risk factors on the business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. We expressly disclaim any responsibility to update forward-looking statements, whether as a result of new information, future events or otherwise.

Page 3

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Corporate Information

Corporate Profile

Digital Realty Trust, Inc. owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter® and Powered Base Building® datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and Internet enterprises, to manufacturing and financial services. Digital Realty Trust’s 81 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 14.4 million rentable square feet, including 1.8 million square feet of space held for redevelopment, Digital Realty Trust’s portfolio is located in 27 markets throughout North America and Europe. For additional information, please visit the company’s website at www.digitalrealtytrust.com.

Corporate Headquarters

560 Mission Street, Suite 2900

San Francisco, California 94105

Telephone: (415) 738-6500

Facsimile: (415) 738-6501

Web site: www.digitalrealtytrust.com

Senior Management

Richard A. Magnuson: Chairman

Michael F. Foust: Chief Executive Officer

A. William Stein: Chief Financial Officer and Chief Investment Officer

Scott E. Peterson: Senior Vice President, Acquisitions

Christopher J. Crosby: Senior Vice President, Corporate Development

David J. Caron: Senior Vice President, Portfolio Management

Investor Relations

To request an Investor Relations package or be added to our e-mail distribution list, please visit our website:

www.digitalrealtytrust.com            (Proceed to Information Request in the Investor Relations section)

Analyst Coverage
Credit Suisse	UBS	JMP Securities	Deutsche Bank
Andrew Rossivach	Ross Nussbaum	William Marks	John Perry
(415) 249-7941	(212) 713-2484	(415) 835-8944	(212) 250-4912
	Robert Salisbury	Susan Guitierrez	Victor Chao
	(212) 713-4760	(415) 835-9303	(212) 250-6799
Green Street	Oppenheimer	Citigroup	Baird	Bank of America
Michael Knott	Srinivas Anantha	Michael Bilerman	David Aubuchon	Jamie Feldman
(949) 640-8780	(617) 428-5960	(212) 816-1685	(314) 863-4235	(646) 855-5808
John Stewart	Peter Armstrong	Mark Montandon	Justin Pelham-Webb	Jana Galan
(949) 640-8780	(212) 667-5808	(212) 816-1685	(314) 863-6413	(646) 855-3081
RBC Capital Markets	Raymond James	KeyBanc Capital Markets	ISI	Stifel Nicolaus
Dave Rodgers	Paul D. Puryear	Jordan Sadler	Steve Sakwa	Todd Weller
(440) 715-2647	(727) 567-2253	(917) 368-2280	(212) 446-9462	(443) 224-1305
Mike Carroll	William A. Crowe	Craig Mailman	Ian Weismann	Ben Lowe
(440) 715-2649	(727) 567-2594	(917) 368-2316	(212) 446-9461	(443) 224-1264

Stock Listing Information

The stock of Digital Realty Trust, Inc. is traded primarily on the New York Stock Exchange under the following symbols:

Common Stock:	DLR
Series A Preferred Stock:	DLRPA
Series B Preferred Stock:	DLRPB
Note that symbols may vary by stock quote provider.

Common Stock Price Performance

The following summarizes recent activity of Digital Realty’s common stock (DLR):

	4th Quarter 2009			3rd Quarter 2009			2nd Quarter 2009			1st Quarter 2009			4th Quarter 2008			3rd Quarter 2008			2nd Quarter 2008			1st Quarter 2008
High Price *	$	50.81		$	48.21		$	39.84		$	35.70		$	47.62		$	51.28		$	43.45		$	39.20
Low Price *	$	42.94		$	34.27		$	32.14		$	24.96		$	18.04		$	36.96		$	35.43		$	31.28
Closing Price, end of quarter *	$	50.28		$	45.71		$	35.85		$	33.18		$	32.85		$	47.25		$	40.91		$	35.50
Average daily trading volume *		1,149,605			1,362,583			2,258,424			2,074,752			1,876,211			1,139,423			904,670			1,224,336
Indicated dividend per common share **	$	1.800		$	1.440		$	1.320		$	1.320		$	1.320		$	1.240		$	1.240		$	1.240
Closing annual dividend yield, end of quarter		3.6	%		3.2	%		3.7	%		4.0	%		4.0	%		2.6	%		3.0	%		3.5	%
Closing shares and units outstanding end of quarter ***		82,231,880			82,173,996			82,013,377			81,980,716			79,125,833			78,259,621			72,405,839			72,329,436
Closing market value of shares and units outstanding (thousands), end of quarter	$	4,134,619		$	3,756,173		$	2,940,180		$	2,720,120		$	2,599,284		$	3,697,767		$	2,962,123		$	2,567,695

* New York Stock Exchange trades only.

** On an annual basis.

*** As of December 31, 2009, the total number of shares and units includes 76,812,783 shares of common stock, 4,360,549 common units held by third parties and 1,058,548 common units, vested and unvested long-term incentive units and vested class C units held by officers and directors, and excludes all unvested class C units, all unexercised common stock options and all shares potentially issuable upon exchange of our 4.125% exchangeable senior debentures due 2026 and 5.50% exchangeable senior debentures due 2029 or upon conversion of our series C and D cumulative convertible preferred stock.

This Supplemental Operating and Financial Data package supplements the information provided in our quarterly and annual reports filed with the Securities and Exchange Commission. Additional information about us and our properties is also available at our website www.digitalrealtytrust.com.

Page 4

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Ownership Structure

As of December 31, 2009

Partner	# of Units (2)	% Ownership
Digital Realty Trust, Inc.	76,812,783	93.4	%
Cambay Tele.com, LLC (3)	4,327,827	5.3	%
Wave Exchange, LLC (3)	32,722	0.0	%
Directors, Executive Officers and Others	1,058,548	1.3	%
Total	82,231,880	100.0	%

(1) Reflects limited partnership interests held by our officers and directors in the form of common units and vested and unvested long-term incentive units and excludes unvested class C units and all unexercised common stock options.

(2) The total number of shares and units includes 76,812,783 shares of common stock, 4,360,549 common units held by third parties and 1,058,548 common units, vested and unvested long-term incentive units (including vested class C units) held by officers and directors, and excludes all unvested class C units, all unexercised common stock options and all shares potentially issuable upon exchange of our 4.125% exchangeable senior debentures due 2026 and 5.50% exchangeable senior debentures due 2029 or upon conversion of our series C and D cumulative convertible preferred stock.

(3) These third-party contributors received the common units (along with cash and the operating partnership’s assumed debt) in exchange for their interests in 200 Paul Avenue 1-4, 1100 Space Park Drive, the eXchange colocation business and other specified assets and liabilities. Includes 564,913 common units held by the members of Cambay Tele.com, LLC.

Page 5

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Key Quarterly Financial Data ⁽¹⁾

(Unaudited and dollars in thousands, except per share data)

	For the three months ended or as of
	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Shares and Units at End of Quarter
Common shares outstanding		76,812,783			76,519,219			76,140,807			76,042,511			73,306,703			72,556,699			66,174,618			65,481,470
Common units outstanding		5,419,097			5,654,777			5,872,570			5,938,205			5,819,130			5,702,922			6,231,221			6,847,966
Total shares and Operating Partnership units		82,231,880			82,173,996			82,013,377			81,980,716			79,125,833			78,259,621			72,405,839			72,329,436
Market Capitalization
Market value of common equity (2)	$	4,134,619		$	3,756,173		$	2,940,180		$	2,720,120		$	2,599,284		$	3,697,767		$	2,962,123		$	2,567,695
Liquidation value of preferred equity		686,637			686,637			686,637			686,637			686,750			686,750			686,750			686,750
Total debt at balance sheet carrying value		1,784,444			1,599,270			1,519,506			1,439,688			1,385,074			1,283,718			1,361,172			1,190,691
Total market capitalization including preferred equity and debt	$	6,605,700		$	6,042,080		$	5,146,323		$	4,846,445		$	4,671,108		$	5,668,235		$	5,010,045		$	4,445,136
Total debt/Total market capitalization including preferred equity and debt		27.0	%		26.5	%		29.5	%		29.7	%		29.7	%		22.6	%		27.2	%		26.8	%
Selected Balance Sheet Data
Investments in real estate (before depreciation)	$	3,616,714		$	3,416,083		$	3,283,874		$	3,155,062		$	3,051,180		$	2,905,275		$	2,816,258		$	2,602,166
Total assets		3,745,059			3,532,418			3,444,708			3,351,613			3,281,045			3,158,885			3,070,850			2,895,036
Total liabilities		2,110,258			1,878,259			1,773,344			1,705,537			1,705,969			1,548,110			1,623,801			1,444,294
Selected Operating Data
Total operating revenues from continuing operations	$	169,774		$	163,227		$	155,007		$	149,134		$	147,106		$	142,016		$	123,776		$	114,547
Total operating expenses from continuing operations		119,690			117,571			112,161			109,931			106,537			108,358			94,942			89,253
Interest expense from continuing operations		24,451			22,559			22,495			18,937			17,747			15,716			14,956			15,202
Net income		24,897			23,945			21,203			21,189			25,133			18,419			13,550			10,816
Net income (loss) available to common stockholders		14,286			12,406			10,271			10,295			13,793			7,484			3,094			2,319
Financial Ratios
EBITDA (3)	$	90,840		$	85,737		$	82,241		$	75,972		$	78,766		$	69,902		$	58,367		$	56,763
Adjusted EBITDA (4)	$	101,451		$	97,276		$	93,173		$	86,866		$	90,106		$	80,837		$	68,823		$	65,260
Cash interest expense (5)	$	23,915		$	19,812		$	16,695		$	21,398		$	17,439		$	20,116		$	14,691		$	20,093
Fixed charges (6)	$	37,263		$	32,981		$	29,721		$	34,505		$	30,323		$	32,619		$	27,163		$	30,737
Debt service coverage ratio (7)		4.2	x		4.9	x		5.6	x		4.1	x		5.2	x		4.0	x		4.7	x		3.2	x
Fixed charge coverage ratio (8)		2.7	x		2.9	x		3.1	x		2.5	x		3.0	x		2.5	x		2.5	x		2.1	x
Profitability Measures
Net income (loss) per common share - basic	$	0.19		$	0.16		$	0.13		$	0.14		$	0.19		$	0.11		$	0.05		$	0.04
Net income (loss) per common share - diluted	$	0.18		$	0.16		$	0.13		$	0.14		$	0.19		$	0.10		$	0.05		$	0.03
Funds From Operations (FFO) per diluted share and unit (9)	$	0.79		$	0.74		$	0.71		$	0.70		$	0.75		$	0.68		$	0.58		$	0.57
Adjusted Funds From Operations (AFFO) per diluted share and unit (10)	$	0.62		$	0.59		$	0.51		$	0.53		$	0.56		$	0.56		$	0.41		$	0.38
Dividends per share and common unit	$	0.45		$	0.36		$	0.33		$	0.33		$	0.33		$	0.31		$	0.31		$	0.31
Diluted FFO payout ratio (11)		57.3	%		48.9	%		46.5	%		47.4	%		44.1	%		45.6	%		53.2	%		54.4	%
Diluted AFFO payout ratio (12)		72.2	%		61.0	%		64.7	%		62.3	%		58.9	%		55.4	%		75.6	%		81.6	%
Portfolio Statistics
Buildings		114			108			99			99			98			96			96			93
Properties		81			78			75			75			75			74			74			71
Net rentable square feet, excluding redevelopment space		12,573,634			11,964,522			11,854,886			11,784,573			11,387,102			11,244,657			10,977,945			10,795,795
Square feet held for redevelopment (13)		1,784,386			1,876,885			1,148,212			1,218,525			1,573,612			1,606,407			1,873,119			1,863,700
Occupancy at end of quarter (14)		95.0	%		95.2	%		94.8	%		95.1	%		94.9	%		95.2	%		95.2	%		94.7	%
Weighted average remaining lease term (years) (15)		7.3			7.4			7.5			7.6			7.3			7.3			7.4			7.7
Same store occupancy at end of quarter (14)(16)		94.8	%		95.1	%		94.7	%		95.0	%		95.4	%		95.2	%		95.2	%		94.7	%

(1) Financial information for prior periods has been adjusted for the retroactive application of the following new accounting guidance adopted by the Company effective January 1, 2009: FASB ASC 470-20, formerly FASB APB 14-1 “Accounting for Convertible Debt Instruments That May be Settled Upon Conversion (Including Partial Cash Settlement)” and FASB ASC 810-10, formerly Statement of Financial Accounting Standard No.160 “Noncontrolling Interests in Consolidated Financial Statements - An Amendment of ARB No. 51”.

(2) The market value of common equity is based on the closing stock price at the end of the quarter and assumes 100% redemption of the limited partnership units in the operating partnership, including common units and vested and unvested long-term incentive units (including vested class C units), for shares of our common stock. Excludes shares issuable with respect to stock options that have been granted but have not yet been exercised, and also excludes shares issuable upon the redemption of unvested class C units and all shares potentially issuable upon exchange of our 4.125% exchangeable senior debentures due 2026 and 5.50% exchangeable senior debentures due 2029 or upon conversion of our series C and D cumulative convertible preferred stock.

(3) EBITDA is calculated as earnings before interest, taxes, depreciation and amortization. For a discussion of EBITDA, see page 30. For a reconciliation of net income available to common stockholders to EBITDA, see page 10.

(4) Adjusted EBITDA is EBITDA adjusted for preferred dividends and minority interests. For a discussion of Adjusted EBITDA, see page 30. For a reconciliation of net income available to common stockholders to Adjusted EBITDA, see page 10.

(5) Cash interest expense is interest expense per our statement of operations (including interest expense on discontinued operations) less amortization of debt discount and deferred financing fees and includes interest that we capitalized. For a reconciliation of GAAP interest expense to cash interest expense see page 10.

(6) Fixed charges consist of cash interest expense, scheduled debt principal payments and preferred dividends.

(7) Debt service coverage ratio is Adjusted EBITDA divided by cash interest expense.

(8) Fixed charge coverage ratio is Adjusted EBITDA divided by fixed charges.

(9) For a definition and discussion of FFO see page 30. For a reconciliation of net income available to common stockholders to FFO, see page 9.

(10) For a definition and discussion of AFFO, see page 30. For a reconciliation of FFO to AFFO, see page 9.

(11) Diluted FFO payout ratio is dividends declared per common share and unit divided by diluted FFO per share and unit.

(12) Diluted AFFO payout ratio is dividends declared per common share and unit divided by diluted AFFO per share and unit.

(13) Redevelopment space requires significant capital investment in order to develop data center facilities that are ready for use. Most often this is shell space. However, in certain circumstances this may include partially built datacenter space that was not completed by previous ownership and requires a large capital investment in order to build out the space.

(14) Occupancy and same store occupancy excludes space held for redevelopment.

(15) Average remaining lease term excludes renewal options, weighted by net rentable square feet.

(16) Same store properties were acquired before December 31, 2007.

Page 6

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Consolidated Balance Sheets ⁽¹⁾

(Dollars in thousands, except share data)

	December 31, 2009			December 31, 2008
	(unaudited)
ASSETS
Investments in real estate
Land	$	382,763		$	316,318
Acquired ground leases		2,767			2,733
Buildings and improvements		2,952,330			2,467,830
Tenant improvements		272,462			255,818
Investments in real estate		3,610,322			3,042,699
Accumulated depreciation and amortization		(459,521	)		(302,960	)
Net investments in properties		3,150,801			2,739,739
Investment in unconsolidated joint venture		6,392			8,481
Net investments in real estate		3,157,193			2,748,220
Cash and cash equivalents		72,320			73,334
Accounts and other receivables, net		46,086			39,108
Deferred rent		145,550			99,957
Acquired above market leases, net		25,861			31,352
Acquired in place lease value and deferred leasing costs, net		224,216			222,389
Deferred financing costs, net		21,073			16,275
Restricted cash		37,810			45,470
Other assets		14,950			4,940
Total Assets	$	3,745,059		$	3,281,045
LIABILITIES AND EQUITY
Revolving credit facility	$	205,547		$	138,579
Unsecured senior notes		83,000			58,000
Mortgage loans		1,063,663			1,026,594
4.125% exchangeable senior debentures due 2026, net of discount		165,834			161,901
5.50% exchangeable senior debentures due 2029		266,400			—
Accounts payable and other accrued liabilities		151,229			171,176
Accrued dividends and distributions		37,004			26,092
Acquired below market leases, net		69,311			76,660
Security deposits and prepaid rents		68,270			46,967
Total Liabilities		2,110,258			1,705,969
Commitments and contingencies		—			—
EQUITY:
Stockholders’ equity:
Preferred Stock: $0.01 par value, 30,000,000 authorized:
Series A Cumulative Redeemable Preferred Stock, 8.50%, $103,500,000 liquidation preference ($25.00 per share), 4,140,000 issued and outstanding		99,297			99,297
Series B Cumulative Redeemable Preferred Stock, 7.875%, $63,250,000 liquidation preference ($25.00 per share), 2,530,000 issued and outstanding		60,502			60,502
Series C Cumulative Convertible Preferred Stock, 4.375%, $174,998,875 liquidation preference ($25.00 per share), 6,999,955 and 7,000,000 issued and outstanding as of December 31, 2009 and December 31, 2008, respectively		169,067			169,068
Series D Cumulative Convertible Preferred Stock, 5.500%, $344,887,500 liquidation preference ($25.00 per share), 13,795,500 and 13,800,000 issued and outstanding as of December 31, 2009 and December 31, 2008, respectively		333,472			333,581
Common Stock; $0.01 par value: 125,000,000 authorized, 76,812,783 and 73,306,703 shares issued and outstanding as of December 31, 2009 and December 31, 2008, respectively		766			732
Additional paid-in capital		1,155,709			1,057,107
Dividends in excess of earnings		(231,871	)		(166,863	)
Accumulated other comprehensive income, net		(27,947	)		(49,503	)
Total stockholders’ equity		1,558,995			1,503,921
Noncontrolling interests:
Noncontrolling interest in operating partnership		58,192			66,797
Noncontrolling interest in consolidated joint venture		17,614			4,358
Total noncontrolling interests		75,806			71,155
Total Equity		1,634,801			1,575,076
Total Liabilities and Equity	$	3,745,059		$	3,281,045

(1) Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6).

Page 7

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Consolidated Quarterly Statements of Operations ⁽¹⁾

(unaudited and in thousands, except share data)

	Three Months Ended
	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Rental	$	136,425		$	130,878		$	125,380		$	118,089		$	111,398		$	102,449		$	97,966		$	92,746
Tenant reimbursements		32,501			32,236			29,544			31,027			30,136			29,882			25,698			21,787
Other		848			113			83			18			5,572			9,685			112			14
Total operating revenues		169,774			163,227			155,007			149,134			147,106			142,016			123,776			114,547
Rental property operating and maintenance		46,086			45,278			42,301			42,573			43,664			39,859			35,943			31,681
Property taxes		8,349			9,295			9,149			9,211			5,767			8,689			8,522			8,124
Insurance		1,672			1,495			1,488			1,456			1,333			1,252			1,198			1,205
Depreciation and amortization		52,126			50,439			49,183			46,304			47,086			46,548			39,591			39,153
General and administrative		11,363			10,660			10,040			10,102			8,661			11,261			9,686			8,783
Other		94			404			—			285			26			749			2			307
Total operating expenses		119,690			117,571			112,161			109,931			106,537			108,358			94,942			89,253
Operating income		50,084			45,656			42,846			39,203			40,569			33,658			28,834			25,294
Equity in earnings of unconsolidated joint venture		(776	)		1,091			741			1,116			1,860			178			173			158
Interest and other income		17			90			403			243			591			453			407			655
Interest expense		(24,451	)		(22,559	)		(22,495	)		(18,937	)		(17,747	)		(15,716	)		(14,956	)		(15,202	)
Tax expense		23			(333	)		(292	)		(436	)		(140	)		(154	)		(726	)		(89	)
Loss from early extinguishment of debt		—			—			—			—			—			—			(182	)		—
Net income		24,897			23,945			21,203			21,189			25,133			18,419			13,550			10,816
Net income attributable to noncontrolling interest		(510	)		(1,438	)		(831	)		(793	)		(1,238	)		(833	)		(354	)		(239	)
Net income attributable to Digital Realty Trust, Inc.		24,387			22,507			20,372			20,396			23,895			17,586			13,196			10,577
Preferred stock dividends		(10,101	)		(10,101	)		(10,101	)		(10,101	)		(10,102	)		(10,102	)		(10,102	)		(8,258	)
Net income available to common stockholders	$	14,286		$	12,406		$	10,271		$	10,295		$	13,793		$	7,484		$	3,094		$	2,319
Net income per share available to common stockholders - basic	$	0.19		$	0.16		$	0.13		$	0.14		$	0.19		$	0.11		$	0.05		$	0.04
Net income per share available to common stockholders - diluted	$	0.18		$	0.16		$	0.13		$	0.14		$	0.19		$	0.10		$	0.05		$	0.03
Weighted-average shares outstanding - basic		76,649,529			76,301,577			76,121,380			74,703,755			73,011,453			70,916,019			65,889,122			65,431,586
Weighted-average shares outstanding - diluted		78,496,296			77,674,137			76,851,202			74,895,168			73,205,628			73,338,871			68,068,600			67,142,783
Weighted-average fully diluted shares and units		84,043,043			83,466,346			82,728,389			80,741,438			79,289,939			79,376,123			74,533,055			73,886,689

(1) Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6).

Page 8

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Funds From Operations (FFO) ⁽¹⁾

(unaudited and in thousands except per share data)

	Three Months Ended
	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Reconciliation of net income available to common stockholders to FFO (Note):
Net income available to common stockholders	$	14,286		$	12,406		$	10,271		$	10,295		$	13,793		$	7,484		$	3,094		$	2,319
Adjustments:
Noncontrolling interests in operating partership		984			898			757			793			1,149			637			304			239
Real estate related depreciation and amortization (2)		51,821			50,163			48,900			46,087			46,890			46,359			39,414			38,994
Real estate related depreciation and amortization related to investment in unconsolidated joint venture		2,335			543			858			646			(286	)		859			872			894
FFO available to common stockholders and unitholders	$	69,426		$	64,010		$	60,786		$	57,821		$	61,546		$	55,339		$	43,684		$	42,446
FFO per share and unit:
Basic	$	0.84		$	0.78		$	0.74		$	0.72		$	0.78		$	0.72		$	0.60		$	0.59
Diluted (3)	$	0.79		$	0.74		$	0.71		$	0.70		$	0.75		$	0.68		$	0.58		$	0.57
Weighted-average shares and units outstanding - basic		82,196			82,094			81,999			80,550			79,096			76,953			72,354			72,175
Weighted-average shares and units outstanding - diluted (3)		102,068			101,492			99,461			92,571			91,123			91,209			86,366			82,524
(1)      Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6). (2)      Real estate depreciation and amortization was computed as follows:
Depreciation and amortization per income statement	$	52,126		$	50,439		$	49,183		$	46,304		$	47,086		$	46,548		$	39,591		$	39,153
Non-real estate depreciation		(305	)		(276	)		(283	)		(217	)		(196	)		(189	)		(177	)		(159	)
	$	51,821		$	50,163		$	48,900		$	46,087		$	46,890		$	46,359		$	39,414		$	38,994
(3)      At December 31, 2009, we had 7,000 series C convertible preferred shares and 13,796 series D convertible preferred shares outstanding that were convertible into 3,657 common shares and 8,215 common shares, respectively. In addition, we had a balance of $266,400 of 5.50% exchangeable senior debentures that were exchangeable for 6,195 and 4,345 common shares on a weighted average basis for the three months and year ended December 31, 2009, respectively. See below for calculations of diluted FFO available to common stockholders and unitholders and weighted average common stock and units outstanding.
FFO available to common stockholders and unitholders	$	69,426		$	64,010		$	60,786		$	57,821		$	61,546		$	55,339		$	43,684		$	42,446
Add: Series C convertible preferred dividends		1,914			1,914			1,914			1,914			1,914			1,914			1,914			1,914
Add: Series D convertible preferred dividends		4,742			4,742			4,742			4,742			4,744			4,744			4,744			2,899
Add: 5.50% exchangeable senior debentures interest expense		4,050			4,050			3,148			—			—			—			—			—
FFO available to common stockholders and unitholders — diluted	$	80,132		$	74,716		$	70,590		$	64,477		$	68,204		$	61,997		$	50,342		$	47,259
Weighted average common stock and units outstanding		82,196			82,094			81,999			80,550			79,096			76,953			72,354			72,175
Add: Effect of dilutive securities (excl. series C & D convert. preferred stock & 5.50% debentures)		1,847			1,373			730			191			194			2,423			2,179			1,712
Add: Effect of dilutive series C convertible preferred stock		3,615			3,615			3,615			3,615			3,615			3,615			3,615			3,615
Add: Effect of dilutive series D convertible preferred stock		8,215			8,215			8,215			8,215			8,218			8,218			8,218			5,022
Add: Effect of dilutive 5.50% exchangeable senior debentures		6,195			6,195			4,902			—			—			—			—			—
Weighted average common stock and units outstanding — diluted		102,068			101,492			99,461			92,571			91,123			91,209			86,366			82,524
Note: For a definition and discussion of FFO, see page 30.
Adjusted Funds From Operations (AFFO) (1) (unaudited and in thousands)
	Three Months Ended
	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Reconciliation of FFO to AFFO:
Funds from operations available to common stockholders and unitholders (FFO)	$	69,426		$	64,010		$	60,786		$	57,821		$	61,546		$	55,339		$	43,684		$	42,446
Adjustments:
Non-real estate depreciation		305			276			283			217			196			189			177			159
Amortization of deferred financing costs		2,254			2,114			1,896			1,662			1,599			1,524			1,411			1,398
Amortization of debt discount		1,008			992			974			959			943			927			911			896
Non-cash compensation		2,273			2,185			2,130			1,520			1,663			3,174			1,582			1,220
Loss from early extinguishment of debt		—			—			—			—			—			—			182			—
Straight line rents		(11,275	)		(11,669	)		(11,089	)		(11,308	)		(11,036	)		(8,301	)		(8,899	)		(7,771	)
Above and below market rent amortization		(1,830	)		(1,953	)		(2,118	)		(2,139	)		(1,971	)		(2,081	)		(2,525	)		(2,685	)
Capitalized leasing compensation		(1,968	)		(1,917	)		(1,414	)		(1,271	)		(1,008	)		(1,009	)		(974	)		(1,045	)
Recurring capital expenditures and tenant improvements		(3,011	)		(2,980	)		(7,161	)		(496	)		(3,031	)		(1,730	)		(3,699	)		(2,868	)
Capitalized leasing commissions		(4,038	)		(1,823	)		(2,467	)		(4,283	)		(4,349	)		(3,759	)		(1,259	)		(3,936	)
AFFO available to common stockholders and unitholders	$	53,144		$	49,235		$	41,820		$	42,682		$	44,552		$	44,273		$	30,591		$	27,814

(1) Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6).

Note: For a definition and discussion of AFFO, see page 30. For a reconciliation of net income available to common stockholders to FFO, see above table.

Page 9

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Reconciliation of Earnings before interest, taxes, depreciation and amortization (EBITDA) ⁽¹⁾⁽²⁾

(unaudited and in thousands)

	Three Months Ended
	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Net income available to common stockholders	$	14,286		$	12,406		$	10,271		$	10,295		$	13,793		$	7,484		$	3,094		$	2,319
Interest		24,451			22,559			22,495			18,937			17,747			15,716			14,956			15,202
Taxes		(23	)		333			292			436			140			154			726			89
Depreciation and amortization		52,126			50,439			49,183			46,304			47,086			46,548			39,591			39,153
EBITDA		90,840			85,737			82,241			75,972			78,766			69,902			58,367			56,763
Noncontrolling interest		510			1,438			831			793			1,238			833			354			239
Preferred stock dividends		10,101			10,101			10,101			10,101			10,102			10,102			10,102			8,258
Adjusted EBITDA	$	101,451		$	97,276		$	93,173		$	86,866		$	90,106		$	80,837		$	68,823		$	65,260
(1)      For the definition and discussion of EBITDA and Adjusted EBITDA, see page 30. (2)      Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6).
Financial Ratios (1)
(unaudited and in thousands)
	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Total GAAP interest expense		24,451			22,559			22,495			18,937			17,747			15,716			14,956			15,202
Capitalized interest		1,950			2,027			2,147			3,072			4,305			4,630			4,708			4,708
Change in accrued interest and other noncash amounts		(2,486	)		(4,774	)		(7,947	)		(611	)		(4,613	)		(230	)		(4,973	)		183
Cash interest expense (a)		23,915			19,812			16,695			21,398			17,439			20,116			14,691			20,093
Scheduled debt principal payments and preferred dividends		13,348			13,169			13,026			13,107			12,884			12,503			12,472			10,644
Total fixed charges (b)		37,263			32,981			29,721			34,505			30,323			32,619			27,163			30,737
Debt service coverage ratio based on GAAP interest expense (c)		4.1	x		4.3	x		4.1	x		4.6	x		5.1	x		5.1	x		4.6	x		4.3	x
Debt service coverage ratio based on cash interest expense (c)		4.2	x		4.9	x		5.6	x		4.1	x		5.2	x		4.0	x		4.7	x		3.2	x
Fixed charge coverage ratio based on GAAP interest expense (d)		2.7	x		2.7	x		2.6	x		2.7	x		2.9	x		2.9	x		2.5	x		2.5	x
Fixed charge coverage ratio based on cash interest expense (d)		2.7	x		2.9	x		3.1	x		2.5	x		3.0	x		2.5	x		2.5	x		2.1	x
Debt to total market capitalization including debt and preferred equity (e)		27.0	%		26.5	%		29.5	%		29.7	%		29.7	%		22.6	%		27.2	%		26.8	%
Debt plus preferred stock to total market capitalization including debt and preferred equity (f)		37.4	%		37.8	%		42.9	%		43.9	%		44.4	%		34.8	%		40.9	%		42.2	%
Pretax income to interest expense (g)		2.0	x		2.1	x		1.9	x		2.1	x		2.4	x		2.2	x		1.9	x		1.7	x
Net Debt to Adjusted EBITDA (h)		4.2	x		4.0	x		3.9	x		3.9	x		3.6	x		3.8	x		4.9	x		4.4	x

(a) Cash interest expense is interest expense less amortization of debt discount and deferred financing fees and includes interest that we capitalized. We consider cash interest expense to be a useful measure of interest as it excludes non-cash based interest expense.

(b) For a definition of Fixed Charges see page 6.

(c) Adjusted EBITDA divided by interest expense.

(d) Adjusted EBITDA divided by fixed charges. Fixed charges include interest expense as per (a) above and scheduled debt principal payments and preferred dividends.

(e) Mortgage debt and other loans divided by mortgage debt and other loans plus the liquidation value of preferred stock and the market value of outstanding common stock and operating partnership units, assuming the redemption of operating partnership units for shares of our common stock.

(f) Same as (e), except numerator includes preferred stock.

(g) Calculated as income including interest divided by GAAP interest expense.

(h) Calculated as total debt at balance sheet carrying value (see page 6) less cash and cash equivalents divided by Adjusted EBITDA multiplied by four.

(1) Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6).

Page 10

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Net Operating Income (NOI) and Run-rate NOI

For the three months ended December 31, 2009

(unaudited and in thousands)

Rental revenues	$	136,425
Tenant reimbursements		32,501
Rental property operating and maintenance		(46,086	)
Property taxes		(8,349	)
Insurance		(1,672	)
NOI	$	112,819
Actual results of properties acquired during the quarter:
Rental revenues		(2,063	)
Tenant reimbursements		(303	)
Rental property operating and maintenance		17
Property taxes		227
Insurance		57
Projected full quarter of actual results of properties acquired during the quarter:
Rental revenues		4,065
Tenant reimbursements		697
Rental property operating and maintenance		(52	)
Property taxes		(520	)
Insurance		(142	)
Run-rate NOI	$	114,802
Reconciliation of net income available to common stockholders to NOI
Net income available to common stockholders	$	14,286
Other revenues		(848	)
Interest expense		24,451
Depreciation and amortization		52,126
General and administrative expenses		11,363
Tax expense		(23	)
Other expenses		94
Equity in earnings of unconsolidated joint venture		776
Interest and other income		(17	)
Net income attributable to noncontrolling interest		510
Preferred stock dividends		10,101
NOI	$	112,819

Note: For a definition and discussion of NOI and Run-rate NOI, see page 30.

Page 11

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Same Store and New Properties Consolidated Quarterly Statements of Operations ⁽¹⁾

(unaudited and in thousands)

	Three Months Ended
Same store (2)	31-Dec-09			30-Sep-09			30-Jun-09			31-Mar-09			31-Dec-08			30-Sep-08			30-Jun-08			31-Mar-08
Operating Revenues:
Rental	$	129,666		$	127,854		$	122,415		$	115,993		$	110,692		$	101,575		$	97,892		$	92,746
Tenant reimbursements		31,030			31,038			28,444			29,919			28,507			29,878			25,698			21,787
Other		848			113			83			18			5,572			9,685			112			14
Total operating revenues		161,544			159,005			150,942			145,930			144,771			141,138			123,702			114,547
Operating Expenses:
Rental property operating and maintenance		43,394			43,259			40,435			41,094			41,763			39,802			35,931			31,624
Property taxes		7,727			9,027			8,986			9,107			5,724			8,650			8,521			8,124
Insurance		1,552			1,455			1,463			1,439			1,325			1,246			1,198			1,205
Depreciation and amortization		49,751			49,319			48,092			45,460			46,729			46,255			39,591			39,153
General and administrative (3)		11,363			10,660			10,040			10,102			8,661			11,261			9,686			8,783
Other		94			404			—			285			26			749			2			307
Total operating expenses		113,881			114,124			109,016			107,487			104,228			107,963			94,929			89,196
Operating income		47,663			44,881			41,926			38,443			40,543			33,175			28,773			25,351
Other Income (Expenses):
Equity in earnings of unconsolidated joint venture		(776	)		1,091			741			1,116			1,860			178			173			158
Interest and other income		14			91			402			242			589			452			405			655
Interest expense (4)		(23,486	)		(22,301	)		(22,459	)		(18,937	)		(17,747	)		(15,716	)		(14,954	)		(15,202	)
Tax expense		24			(332	)		(314	)		(434	)		(140	)		(154	)		(726	)		(89	)
Loss from early extinguishment of debt		—			—			—			—			—			—			(182	)		—
Net income	$	23,439		$	23,430		$	20,296		$	20,430		$	25,105		$	17,935		$	13,489		$	10,873
New properties (2)
Operating Revenues:
Rental	$	6,759		$	3,024		$	2,965		$	2,096		$	706		$	874		$	74		$	—
Tenant reimbursements		1,471			1,198			1,100			1,108			1,629			4			—			—
Other		—			—			—			—			—			—			—			—
Total operating revenues		8,230			4,222			4,065			3,204			2,335			878			74			—
Operating Expenses:
Rental property operating and maintenance		2,692			2,019			1,866			1,479			1,901			57			12			57
Property taxes		622			268			163			104			43			39			1			—
Insurance		120			40			25			17			8			6			—			—
Depreciation and amortization		2,375			1,120			1,091			844			357			293			—			—
General and administrative (3)		—			—			—			—			—			—			—			—
Other		—			—			—			—			—			—			—			—
Total operating expenses		5,809			3,447			3,145			2,444			2,309			395			13			57
Operating income		2,421			775			920			760			26			483			61			(57	)
Other Income (Expenses):
Equity in earnings of unconsolidated joint venture		—			—			—			—			—			—			—			—
Interest and other income		3			(1	)		1			1			2			1			2			—
Interest expense (4)		(965	)		(258	)		(36	)		—			—			—			(2	)		—
Income tax expense		(1	)		(1	)		22			(2	)		—			—			—			—
Loss from early extinguishment of debt		—			—			—			—			—			—			—			—
Net Income	$	1,458		$	515		$	907		$	759		$	28		$	484		$	61		$	(57	)

(1) Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009 (see footnote 1 on page 6).

(2) Same store properties are properties that were acquired on or before December 31, 2007 and new properties are properties acquired after December 31, 2007.

(3) General and administrative expenses are included entirely in same store as they are not allocable to specific properties.

(4) Interest expense on our revolving credit facility is allocated entirely to same store properties.

Page 12

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Same Store Operating Trend Summary ⁽¹⁾

(unaudited and in thousands, except share data)

	Three Months Ended
Same store (2)	31-Dec-09			30-Sep-09			Percentage Change		31-Dec-08			Percentage Change
Rental (3)	$	129,666		$	127,854		1.4	%	$	110,692		17.1	%
Tenant reimbursements		31,030			31,038		(0.0	)%		28,507		8.9	%
		160,696			158,892		1.1	%		139,199		15.4	%
Rental property operating and maintenance		43,394			43,259		0.3	%		41,763		3.9	%
Property taxes		7,727			9,027		(14.4	)%		5,724		35.0	%
Insurance		1,552			1,455		6.7	%		1,325		17.1	%
		52,673			53,741		(2.0	)%		48,812		7.9	%
Net Operating Income (4)	$	108,023		$	105,151		2.7	%	$	90,387		19.5	%
Same store occupancy at end of quarter		94.8	%		95.1	%				95.4	%

(1) Results for all periods have been adjusted for the retroactive application of the new accounting pronouncements adopted by the Company on January 1, 2009. (See footnote 1 on page 6).

(2) Same store properties were acquired on or before December 31, 2007.

(3) For the periods presented, same store straight-line rent was $9,950, $11,102 and $11,677, respectively, and non-cash purchase accounting adjustments were $1,804, $1,926 and $1,945, respectively.

(4) For a definition and discussion of Net Operating Income, see page 30.

Page 13

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Consolidated Debt Analysis

(unaudited, in thousands)

	Maturity Date	Principal Balance as of December 31, 2009			% of Debt		Interest Rate as of December 31, 2009		Interest Rate as of December 31, 2009 including caps and swaps
Unhedged Floating Rate Debt
Revolving credit facility	August 31, 2012 (1)		205,547		11.5	%	1.35	%	—
		$	205,547		11.5	%
Fixed Rate Mortgage Debt and Hedged Floating Rate Debt
Secured Term Debt	November 11, 2014		144,078		8.1	%	5.65	%	—
3 Corporate Place	August 1, 2013 (1)		80,000		4.5	%	6.72	%	—
200 Paul Avenue 1-4	October 8, 2015		77,803		4.4	%	5.74	%	—
2045 & 2055 LaFayette Street	February 6, 2017		67,271		3.8	%	5.93	%	—
Mundells Roundabout	November 30, 2013		69,154		3.9	%	1.72	%	4.18	%
600 West Seventh Street	March 15, 2016		55,524		3.1	%	5.80	%	—
34551 Ardenwood Boulevard 1-4	November 11, 2016		54,945		3.1	%	5.95	%	—
1100 Space Park Drive	December 11, 2016		54,944		3.1	%	5.89	%	—
1350 Duane Avenue/3080 Raymond Street	October 1, 2012		52,800		3.0	%	5.42	%	—
150 South First Street	February 6, 2017		52,760		3.0	%	6.30	%	—
114 Rue Ambroise Croizat	January 18, 2012		45,067		2.5	%	2.05	%	5.13	%
Clonshaugh Industrial Estate II	September 4, 2014		42,993		2.4	%	5.20	%	7.20	%
1500 Space Park Drive	October 5, 2013		41,883		2.3	%	6.15	%	—
2334 Lundy Place	November 11, 2016		39,960		2.2	%	5.96	%	—
Unit 9, Blanchardstown Corporate Park	January 18, 2012		38,746		2.2	%	2.05	%	5.35	%
Cressex 1	October 16, 2014		29,486		1.7	%	5.68	%	—
6 Braham Street	April 10, 2011		20,831		1.2	%	1.51	%	5.84	%
1201 Comstock Street	June 24, 2013 (1)		17,737		1.0	%	3.73	%	—
Datacenter Park — Dallas	September 15, 2012 (1)		17,000		0.9	%	5.00	%	—
Paul van Vlissingenstraat 16	July 18, 2013		15,208		0.8	%	2.30	%	5.58	%
Chemin de l’ Epinglier 2	July 18, 2013		11,046		0.6	%	2.20	%	5.57	%
Gyroscoopweg 2E-2F	October 18, 2013		9,682		0.5	%	2.20	%	5.49	%
1125 Energy Park Drive	March 1, 2032		9,203		0.5	%	7.62	%	—
Manchester Technopark	October 16, 2014		8,970		0.5	%	5.68	%	—
731 East Trade Street	July 1, 2020		5,315		0.3	%	8.22	%	—
		$	1,062,406		59.6	%
4.125% exchangeable senior debentures due 2026	August 15, 2026		172,500		9.7	%	6.75	%	—
5.50% exchangeable senior debentures due 2029	April 15, 2029		266,400		14.9	%	5.50	%
Unsecured senior notes — Series A	July 24, 2011		25,000		1.4	%	7.00	%	—
Unsecured senior notes — Series B	November 5, 2013		33,000		1.8	%	9.32	%	—
Unsecured senior notes — Series C	January 6, 2016		25,000		1.4	%	9.68	%	—
Total Fixed Rate Debt Including Caps and Swaps		$	1,584,306		88.8	%
Unamortized discount on 4.125% exchangeable senior debentures due 2026			(6,666	)	(0.4	)%
Unamortized premium, net —1125 Energy Park Drive, 731 East Trade Street, 1500 Space Park Drive and 1350 Duane Avenue/3080 Raymond Street mortgages			1,257		0.1	%
Total Consolidated Debt		$	1,784,444		100.0	%
Weighted average cost of debt (including interest rate caps and swaps)									5.45	%

(1) Assumes all extensions will be exercised.

Credit Facility

(in thousands)

	Maximum Available as of December 31, 2009		Available as of December 31, 2009		Drawn as of December 31, 2009
Revolving Credit Facility	$	750,000	$	521,500	$	205,547

Page 14

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

REVOLVING CREDIT FACILITY COMMITMENTS

(Dollar amounts in thousands)

	Lender / Issuing Bank	Amount Committed
1	Bank of America, N.A.	$	130,000
2	Citicorp North America, Inc.		85,000
3	KeyBank, N.A.		85,000
4	Credit Suisse, Cayman Islands Branch		75,000
5	The Royal Bank of Scotland PLC		70,000
6	Deutsche Bank		70,000
7	Raymond James Bank, FSB		50,000
8	Royal Bank of Canada, New York Branch		40,000
9	Morgan Stanley Bank, National Association		30,000
10	Société Générale		25,000
11	UBS Loan Finance LLC		25,000
12	Allied Irish Banks, p.l.c.		15,000
13	Chang Hwa Commercial Bank, Ltd., New York Branch		15,000
14	Mega International Commercial Bank Co., Ltd Los Angeles Branch		15,000
15	Comerica Bank		10,000
16	First Commercial Bank New York Agency		10,000
	Total Commitments - Revolving Credit Facility	$	750,000

Note: The revolving credit facility has a $515.0 million sub-facility for multi-currency advances.

Page 15

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Debt Maturities

(unaudited, in thousands)

Property	2010		2011		2012		2013		2014		Thereafter		Total
Revolving Credit Facility (1)	$	—	$	—	$	205,547	$	—	$	—	$	—	$	205,547
Secured Term Debt (2)		2,550		2,700		2,836		3,026		132,966		—		144,078
Unsecured senior notes		—		25,000		—		33,000		—		25,000		83,000
3 Corporate Place (1)		—		—		—		80,000		—		—		80,000
200 Paul Avenue 1-4		1,624		1,721		1,812		1,932		2,048		68,666		77,803
2045 & 2055 LaFayette Street		835		886		941		999		1,061		62,549		67,271
Mundells Roundabout		—		—		—		69,154		—		—		69,154
600 West Seventh Street		1,367		1,448		1,535		1,626		1,723		47,825		55,524
34551 Ardenwood Boulevard 1-4		639		678		711		765		813		51,339		54,945
1100 Space Park Drive		648		687		720		774		821		51,294		54,944
1350 Duane Avenue/3080 Raymond Street		—		—		52,800		—		—		—		52,800
150 South First Street		596		635		677		722		770		49,360		52,760
114 Rue Ambroise Croizat		705		705		43,657		—		—		—		45,067
Clonshaugh Industrial Estate II		—		—		—		—		42,993		—		42,993
1500 Space Park Drive		1,942		2,067		2,192		35,682		—		—		41,883
2334 Lundy Place		464		493		517		556		590		37,340		39,960
Unit 9, Blanchardstown Corporate Park		606		606		37,534		—		—		—		38,746
Cressex 1		—		495		495		495		28,001		—		29,486
6 Braham Street		646		20,185		—		—		—		—		20,831
1201 Comstock Street (1)		762		813		866		15,296		—		—		17,737
Datacenter Park — Dallas (1)		850		808		15,342		—		—		—		17,000
Paul van Vlissingenstraat 16		241		241		241		14,485		—		—		15,208
Chemin de l'Epinglier 2		174		174		174		10,524		—		—		11,046
Gyroscoopweg 2E-2F		153		153		153		9,223		—		—		9,682
1125 Energy Park Drive		143		154		165		180		194		8,367		9,203
Manchester Technopark		—		151		151		151		8,517		—		8,970
731 East Trade Street		235		274		297		323		350		3,836		5,315
4.125% exchangeable senior debentures due 2026 (3)		—		172,500		—		—		—		—		172,500
5.50% exchangeable senior debentures due 2029 (4)		—		—		—		—		266,400		—		266,400
Total	$	15,180	$	233,574	$	369,363	$	278,913	$	487,247	$	405,576	$	1,789,853
Weighted Average Term to Initial Maturity (3)(4)				3.9 Years
Weighted Average Term to Initial Maturity (assuming exercise of extension options) (3)(4)				4.2 Years

(1) Assumes all extensions will be exercised.

(2) This amount represents six mortgage loans secured by our interests in 36 NE 2nd Street, 3300 East Birch Street, 100 & 200 Quannapowitt Parkway, 300 Boulevard East, 4849 Alpha Road, and 11830 Webb Chapel Road. Each of these loans is cross-collateralized by the six properties.

(3) Assumes maturity of 4.125% exchangeable senior debentures due 2026 at first redemption date in August 2011.

(4) Assumes maturity of 5.50% exchangeable senior debentures due 2029 at first redemption date in April 2014.

Note: Total excludes $1,257 of loan premiums, net and ($6,666) of debt discount on 4.125% exchangeable senior debentures due 2026.

Page 16

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Portfolio Summary

As of December 31, 2009

	12/31/2009		9/30/2009
Number of Properties:
Domestic	67		64
International	14		14
	81	(1)	78	(1)
Number of Buildings:
Domestic	96		90
International	18		18
	114		108
Number of Markets:
Domestic	20		20
International	7		7
	27		27
Net Rentable Square Feet:
Domestic	11,363,578		10,762,478
International	1,210,056		1,202,044
	12,573,634		11,964,522
Redevelopment Square Feet:
Domestic	1,590,756		1,675,243
International	193,630		201,642
	1,784,386		1,876,885
Portfolio Occupancy (2)	95.0	%	95.2	%
Same Store Pool Occupancy (2)	94.8	%	95.1	%
Average Original Lease Term (years)	13.9		13.8
Average Remaining Lease Term (years)	7.3		7.4
Lease Expirations (through 2011)	14.2	%	16.5	%

(1) Excludes one property held as an investment in an unconsolidated joint venture and developable land.

(2) Occupancy excludes space held for redevelopment. For some of our properties, we calculate occupancy based on factors in addition to contractually leased square feet, including available power, required support space and common area.

Page 17

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Properties Acquired

For the three months ended December 31, 2009

Property	Metropolitan Area	Date Acquired	Purchase Price (in millions)			Net Rentable Square Footage of Property	Total Square Footage Held for Redevelopment	Percentage of Total Rentable Square Footage of Property Occupied (1)
1350 Duane Avenue & 3080 Raymond Street	Silicon Valley	Oct-09	$	90.5	(2)	185,000	—	100.0	%
Nokes Boulevard/Beaumeade Circle (3)	Northern Virginia	Dec-09	$	63.3		331,613	—	100.0	%
			$	153.8		516,613	—	100.0	%

(1) Occupancy percentages are calculated net of square footage held for redevelopment. For some of our properties, we calculate occupancy based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(2) The purchase price includes the assumption of a $52.8 million mortgage loan.

(3) Includes four buildings and one parcel of land, considered as two properties for our property count.

Page 18

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Occupancy Analysis

As of December 31, 2009

(Dollar amounts in thousands)

						Occupancy (2)								Net Rentable Square Feet as a % of				Annualized Rent as a % of
Property	Acquisition date	Metropolitan Area	Net Rentable Square Feet	Redevelopment Space	Annualized Rent ($000) (1)	As of 12/31/09		As of 09/30/09		As of 06/30/09		As of 03/31/09		Property Type		Total Portfolio		Property Type		Total Portfolio
Internet Gateway Datacenters
350 East Cermak Road	May-05	Chicago	1,122,749	10,990	53,922	92.3	%	95.9	%	90.6	%	94.0	%	28.6	%	8.9	%	27.7	%	10.8	%
200 Paul Avenue 1-4	Nov-04	San Francisco	436,299	91,381	24,025	99.9	%	99.9	%	99.9	%	95.1	%	11.1		3.5		12.3		4.8
120 E. Van Buren Street	Jul-06	Phoenix	254,497	33,017	21,556	97.7	%	94.0	%	91.7	%	91.7	%	6.5		2.0		11.1		4.3
111 Eighth Avenue (3)	Mar-07	New York /New Jersey	116,843	—	18,663	100.0	%	100.0	%	100.0	%	100.0	%	3.0		0.9		9.6		3.7
600 West Seventh Street	May-04	Los Angeles	482,089	7,633	17,201	95.3	%	94.4	%	94.1	%	94.6	%	12.3		3.8		8.8		3.5
114 Rue Ambroise Croizat	Dec-06	Paris, France	300,622	51,524	15,762	90.1	%	95.7	%	99.3	%	99.1	%	7.7		2.4		8.1		3.2
2323 Bryan Street	Jan-02	Dallas	457,217	19,890	14,465	76.7	%	78.3	%	76.4	%	77.1	%	11.7		3.6		7.4		2.9
1100 Space Park Drive	Nov-04	Silicon Valley	165,297	—	7,764	100.0	%	100.0	%	100.0	%	99.1	%	4.2		1.3		4.0		1.6
36 NE 2nd Street	Jan-02	Miami	162,140	—	5,243	95.9	%	95.9	%	95.9	%	95.9	%	4.1		1.3		2.7		1.1
600-780 S. Federal	Sep-05	Chicago	161,547	—	4,859	69.4	%	69.4	%	69.4	%	69.4	%	4.1		1.4		2.5		1.0
6 Braham Street	Jul-02	London, England	63,233	—	4,602	100.0	%	100.0	%	100.0	%	100.0	%	1.6		0.5		2.4		0.9
900 Walnut Street	Aug-07	St Louis	112,266	—	3,712	97.3	%	92.9	%	97.3	%	93.5	%	2.9		0.9		1.9		0.7
125 North Myers	Aug-05	Charlotte	25,402	—	1,244	100.0	%	100.0	%	100.0	%	100.0	%	0.7		0.2		0.6		0.2
731 East Trade Street	Aug-05	Charlotte	40,879	—	1,200	100.0	%	100.0	%	100.0	%	100.0	%	1.0		0.3		0.6		0.2
113 North Myers	Aug-05	Charlotte	20,086	9,132	678	100.0	%	100.0	%	100.0	%	100.0	%	0.5		0.2		0.3		0.1
			3,921,166	223,567	194,896	92.1	%	93.2	%	91.7	%	92.0	%	100.0	%	31.2	%	100.0	%	39.0	%
Corporate Datacenters
43881 Devon Shafron Drive	Mar-07	Northern Virginia	180,000	—	17,607	98.5	%	98.5	%	99.0	%	83.5	%	2.4	%	1.4	%	6.4	%	3.5	%
3 Corporate Place	Dec-05	New York / New Jersey	276,931	—	15,425	95.9	%	95.6	%	93.7	%	89.5	%	3.8		2.2		5.6		3.1
300 Boulevard East	Nov-02	New York /New Jersey	311,950	—	14,214	100.0	%	100.0	%	100.0	%	100.0	%	4.2		2.5		5.1		2.9
833 Chestnut Street	Mar-05	Philadelphia	588,770	65,988	11,366	86.4	%	86.4	%	89.5	%	87.9	%	8.0		4.7		4.1		2.3
2440 Marsh Lane	Jan-03	Dallas	135,250	—	11,223	80.7	%	77.6	%	77.6	%	60.0	%	1.8		1.1		4.1		2.3
43791 Devon Shafron Drive	Mar-07	Northern Virginia	132,806	2,194	9,888	100.0	%	100.0	%	100.0	%	100.0	%	1.8		1.1		3.6		2.0
1350 Duane Avenue & 3080 Raymond Street	Oct-09	Silicon Valley	185,000	—	9,438	100.0	%	N/A		N/A		N/A		2.5		1.5		3.4		1.9
3011 Lafayette Street	Jan-07	Silicon Valley	90,780	—	9,376	100.0	%	100.0	%	100.0	%	100.0	%	1.2		0.7		3.4		1.9
Clonshaugh Industrial Estate II	Feb-06	Dublin, Ireland	124,500	—	9,206	100.0	%	100.0	%	100.0	%	100.0	%	1.7		1.0		3.3		1.9
Unit 9, Blanchardstown Corporate Park	Dec-06	Dublin, Ireland	120,000	—	8,850	86.2	%	86.2	%	86.2	%	95.0	%	1.6		1.0		3.2		1.8
1500 Space Park Drive	Sep-07	Silicon Valley	51,615	—	8,534	100.0	%	100.0	%	100.0	%	100.0	%	0.7		0.4		3.1		1.7
1525 Comstock Street	Sep-09	Silicon Valley	42,385	—	8,429	100.0	%	99.2	%	98.3	%	0.0	%	0.6		0.3		3.1		1.7
4025 Midway Road	Jan-06	Dallas	87,964	12,626	8,232	99.8	%	99.8	%	99.8	%	99.8	%	1.2		0.7		3.0		1.6
2055 East Technology Circle	Oct-06	Phoenix	76,350	—	7,553	100.0	%	100.0	%	100.0	%	100.0	%	1.0		0.6		2.7		1.5
Mundells Roundabout	Apr-07	London, England	113,464	—	7,316	100.0	%	100.0	%	100.0	%	100.0	%	1.5		0.9		2.6		1.5
150 South First Street	Sep-04	Silicon Valley	179,761	—	6,731	100.0	%	99.5	%	100.0	%	100.0	%	2.4		1.4		2.4		1.3
2045 & 2055 LaFayette Street	May-04	Silicon Valley	300,000	—	6,660	100.0	%	100.0	%	100.0	%	100.0	%	4.1		2.4		2.4		1.3
11830 Webb Chapel Road	Aug-04	Dallas	365,647	—	6,049	96.6	%	95.0	%	95.0	%	95.0	%	5.0		2.9		2.2		1.2
Cressex 1	Dec-07	London, England	50,847	—	4,741	90.6	%	90.6	%	90.6	%	87.2	%	0.7		0.4		1.7		0.9
14901 FAA Boulevard	Jun-06	Dallas	263,700	—	4,700	100.0	%	100.0	%	100.0	%	100.0	%	3.6		2.1		1.7		0.9
2334 Lundy Place	Dec-02	Silicon Valley	130,752	—	4,600	100.0	%	100.0	%	100.0	%	100.0	%	1.8		1.0		1.7		0.9
375 Riverside Parkway	Jun-03	Atlanta	220,016	30,175	4,480	100.0	%	100.0	%	100.0	%	100.0	%	3.0		1.7		1.6		0.9
45901 & 45845 Nokes Boulevard	Dec-09	Northern Virginia	167,160	—	4,221	100.0	%	N/A		N/A		N/A		2.3		1.3		1.5		0.8
1201 Comstock Street	Jun-08	Silicon Valley	24,000	—	4,197	100.0	%	100.0	%	100.0	%	100.0	%	0.3		0.2		1.5		0.8
3 St. Anne’s Boulevard	Dec-07	London, England	19,890	76,494	4,108	100.0	%	0.0	%	0.0	%	0.0	%	0.3		0.2		1.5		0.8
44470 Chilum Place	Feb-07	Northern Virginia	95,440	—	4,103	100.0	%	100.0	%	100.0	%	100.0	%	1.3		0.8		1.5		0.8
12001 North Freeway	Apr-06	Houston	280,483	20,222	3,815	75.4	%	75.4	%	75.4	%	95.5	%	3.8		2.2		1.4		0.8
115 Second Avenue	Oct-05	Boston	66,730	—	3,437	100.0	%	100.0	%	100.0	%	100.0	%	0.9		0.5		1.2		0.7
2401 Walsh Street	Jun-05	Silicon Valley	167,932	—	3,407	100.0	%	100.0	%	100.0	%	100.0	%	2.3		1.3		1.2		0.7
8534 Concord Center Drive	Jun-05	Denver	85,660	—	3,362	100.0	%	100.0	%	100.0	%	100.0	%	1.2		0.7		1.2		0.7
365 S. Randolphville Road	Feb-08	New York / New Jersey	38,262	226,530	3,104	50.6	%	100.0	%	0.0	%	0.0	%	0.5		0.3		1.1		0.6
Naritaweg 52	Dec-07	Amsterdam, Netherlands	63,260	—	2,745	100.0	%	100.0	%	100.0	%	100.0	%	0.9		0.5		1.0		0.5
21110 Ridgetop Circle	Jan-07	Northern Virginia	135,513	—	2,660	100.0	%	100.0	%	100.0	%	100.0	%	1.8		1.1		1.0		0.5
21561 & 21571 Beaumeade Circle	Dec-09	Northern Virginia	164,453	—	2,604	100.0	%	N/A		N/A		N/A		2.2		1.3		0.9		0.5
1807 Michael Faraday Court	Oct-06	Northern Virginia	19,237	—	2,476	97.1	%	97.1	%	84.1	%	100.0	%	0.3		0.2		0.9		0.5
210 N Tucker Boulevard	Aug-07	St Louis	139,588	62,000	2,339	78.4	%	78.4	%	78.4	%	94.1	%	1.9		1.1		0.9		0.5
200 North Nash Street	Jun-05	Los Angeles	113,606	—	2,305	100.0	%	100.0	%	100.0	%	100.0	%	1.5		0.9		0.8		0.5
Paul van Vlissingenstraat 16	Aug-05	Amsterdam, Netherlands	77,472	35,000	2,258	58.8	%	58.8	%	58.8	%	58.8	%	1.0		0.6		0.8		0.5
2403 Walsh Street	Jun-05	Silicon Valley	103,940	—	2,109	100.0	%	100.0	%	100.0	%	100.0	%	1.4		0.8		0.8		0.4

Page 19

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Occupancy Analysis

As of December 31, 2009

								Occupancy (2)								Net Rentable Square Feet as a % of				Annualized Rent as a % of
Property	Acquisition date	Metropolitan Area	Net Rentable Square Feet		Redevelopment Space	Annualized Rent ($000) (1)		As of 12/31/09		As of 09/30/09		As of 06/30/09		As of 03/31/09		Property Type		Total Portfolio		Property Type		Total Portfolio
4700 Old Ironsides Drive	Jun-05	Silicon Valley	90,139		—		1,829	100.0	%	100.0	%	100.0	%	100.0	%	1.2		0.7		0.7		0.4
Manchester Technopark, Plot C1	Jun-08	Manchester, England	38,016		—		1,778	100.0	%	100.0	%	100.0	%	100.0	%	0.5		0.3		0.7		0.4
444 Toyama Drive	Sep-09	Silicon Valley	42,083		—		1,725	100.0	%	100.0	%	N/A		NA		0.6		0.3		0.6		0.3
4650 Old Ironsides Drive	Jun-05	Silicon Valley	84,383		—		1,712	100.0	%	100.0	%	100.0	%	100.0	%	1.1		0.7		0.6		0.3
Chemin de l’Epinglier 2	Nov-05	Geneva, Switzerland	59,190		—		1,711	100.0	%	100.0	%	100.0	%	100.0	%	0.8		0.5		0.6		0.3
7505 Mason King Court	Nov-08	Northern Virginia	109,650		—		1,694	100.0	%	100.0	%	100.0	%	100.0	%	1.5		0.9		0.6		0.3
3015 Winona Avenue	Dec-04	Los Angeles	82,911		—		1,592	100.0	%	100.0	%	100.0	%	100.0	%	1.1		0.7		0.6		0.3
3065 Gold Camp Drive	Oct-04	Sacramento	62,957		—		1,555	100.0	%	100.0	%	100.0	%	100.0	%	0.9		0.5		0.6		0.3
251 Exchange Place	Nov-05	Northern Virginia	70,982		—		1,547	100.0	%	100.0	%	100.0	%	100.0	%	1.0		0.6		0.6		0.3
6800 Millcreek Drive	Apr-06	Toronto, Canada	83,758		—		1,530	100.0	%	100.0	%	100.0	%	100.0	%	1.1		0.7		0.6		0.3
Clonshaugh Industrial Estate	Feb-06	Dublin, Ireland	20,000		—		1,503	100.0	%	100.0	%	100.0	%	100.0	%	0.3		0.2		0.6		0.3
43831 Devon Shafron Drive	Mar-07	Northern Virginia	117,071		—		1,439	100.0	%	100.0	%	100.0	%	100.0	%	1.6		0.9		0.5		0.3
1125 Energy Park Drive	Mar-05	Minneapolis/St. Paul	112,827		—		1,437	100.0	%	100.0	%	100.0	%	100.0	%	1.5		0.9		0.5		0.3
3300 East Birch Street	Aug-03	Los Angeles	68,807		—		1,415	100.0	%	100.0	%	100.0	%	100.0	%	0.9		0.5		0.5		0.3
101 Aquila Way	Apr-06	Atlanta	313,581		—		1,411	100.0	%	100.0	%	100.0	%	100.0	%	4.2		2.5		0.5		0.3
Gyroscoopweg 2E-2F	Jul-06	Amsterdam, Netherlands	55,585		—		1,260	100.0	%	100.0	%	100.0	%	100.0	%	0.8		0.4		0.5		0.3
8100 Boone Boulevard	Oct-06	Northern Virginia	17,015		—		839	100.0	%	100.0	%	100.0	%	100.0	%	0.2		0.1		0.3		0.2
600 Winter Street	Sep-06	Boston	30,400		—		794	100.0	%	100.0	%	100.0	%	100.0	%	0.4		0.2		0.3		0.2
2300 NW 89th Place	Sep-06	Miami	64,174		—		616	100.0	%	100.0	%	100.0	%	100.0	%	0.9		0.5		0.2		0.1
7620 Metro Center Drive	Dec-05	Austin	45,000		—		605	100.0	%	100.0	%	100.0	%	100.0	%	0.6		0.4		0.2		0.1
1 St. Anne’s Boulevard	Dec-07	London, England	20,219		—		267	100.0	%	100.0	%	100.0	%	100.0	%	0.3		0.2		0.1		0.1
7500 Metro Center Drive	Dec-05	Austin	—		74,962		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
650 Randolph Road	Jun-08	New York / New Jersey	—		127,790		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
1232 Alma Road	Sep-09	Dallas	—		105,726		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
900 Quality Way	Sep-09	Dallas	—		112,253		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
1400 N Bowser Way	Sep-09	Dallas	—		246,940		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
1301 International Parkway	Sep-09	Dallas	—		20,500		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
904 Quality Way	Sep-09	Dallas	—		46,750		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
905 Quality Way	Sep-09	Dallas	—		249,657		—	0.0	%	0.0	%	0.0	%	0.0	%	—		—		—		—
			7,379,862		1,515,807		276,127	95.9	%	95.7	%	95.8	%	96.1	%	100.0	%	58.7	%	100.0	%	55.3	%
Technology Manufacturing
34551 Ardenwood Boulevard 1-4	Jan-03	Silicon Valley	307,657		—		8,775	100.0	%	100.0	%	100.0	%	100.0	%	50.9	%	2.4	%	56.5	%	1.8	%
47700 Kato Road & 1055 Page Avenue	Sep-03	Silicon Valley	183,050		—		3,908	100.0	%	100.0	%	100.0	%	100.0	%	30.3		1.5		25.1		0.8
2010 East Centennial Circle	May-03	Phoenix	113,405		—		2,852	100.0	%	100.0	%	100.0	%	100.0	%	18.8		0.9		18.4		0.6
2 St. Anne’s Boulevard	Dec-07	London, England	—		30,612		—	0.0	%	100.0	%	100.0	%	100.0	%	—		—		—		—
			604,112		30,612		15,535	100.0	%	100.0	%	100.0	%	100.0	%	100.0	%	4.8	%	100.0	%	3.2	%
Technology Office
100 & 200 Quannapowitt Parkway	Jun-04	Boston	386,956		—		7,222	94.9	%	94.9	%	94.9	%	94.9	%	57.9	%	3.1	%	56.8	%	1.4	%
4849 Alpha Road	Apr-04	Dallas	125,538		—		2,856	100.0	%	100.0	%	100.0	%	100.0	%	18.8		1.0		22.4		0.6
1 Savvis Parkway	Aug-07	St Louis	156,000		—		2,644	100.0	%	100.0	%	100.0	%	100.0	%	23.3		1.2		20.8		0.5
908 Quality Way	Sep-09	Dallas	—		14,400		—	0.0	%	0.0	%	N/A		N/A		—		—		—		—
			668,494		14,400		12,722	97.0	%	97.0	%	97.0	%	97.0	%	100.0	%	5.3	%	100.0	%	2.5	%
Portfolio Total/Weighted Average			12,573,634	(4)	1,784,386	$	499,280	95.0	%	95.2	%	94.8	%	95.1	%	100.0	%	100.0	%	100.0	%	100.0	%

(1) Annualized rent represents the monthly contractual rent under existing leases as of December 31, 2009 multiplied by 12. We estimate the total net rentable square feet available for lease based on a number of factors in addition to contractually leased square feet, including available power, required support space and common area.

(2) Occupancy excludes space held for redevelopment. For some of our properties, we calculate occupancy based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(3) Includes approximately 33,700 rentable square feet from a leasehold interest acquisition.

(4) Net rentable square feet excludes 400,369 rentable square feet of space in a joint venture located at 2001 Sixth Avenue in Seattle, WA, which was 96.6% occupied as of December 31, 2009.

Page 20

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Major Tenants

as of December 31, 2009

(Dollar amounts in thousands)

	Tenant	Number of Locations	Total Occupied Square Feet (1)	Percentage of Net Rentable Square Feet		Annualized Rent (2)		Percentage of Annualized Rent		Weighted Average Remaining Lease Term in Months
1	Savvis Communications	18	1,868,799	14.9	%	$	48,792	9.8	%	112
2	Equinix Operating Company, Inc. (3)	4	607,401	4.8	%	$	24,975	5.0	%	95
3	Qwest Communications International, Inc.	15	637,712	5.1	%	$	20,402	4.1	%	70
4	Facebook, Inc.	3	134,999	1.1	%	$	17,809	3.6	%	89
5	NTT Communications Company	4	295,339	2.3	%	$	16,820	3.4	%	63
6	TelX Group, Inc.	10	126,130	1.0	%	$	16,148	3.2	%	203
7	AT & T	14	553,828	4.4	%	$	14,533	2.9	%	106
8	JPMorgan Chase & Co.	3	149,935	1.2	%	$	14,437	2.9	%	120
9	Morgan Stanley	2	92,451	0.7	%	$	13,689	2.7	%	49
10	Level 3 Communications, LLC (4)	20	318,656	2.5	%	$	11,537	2.3	%	107
11	Yahoo! Inc.	2	110,847	0.9	%	$	9,763	1.9	%	94
12	eircom Limited	1	124,500	1.0	%	$	9,206	1.8	%	115
13	BT Americas, Inc.	3	47,286	0.4	%	$	8,981	1.8	%	96
14	Sprint Communications Co., LP	6	173,319	1.4	%	$	8,891	1.8	%	57
15	T-Systems North America, Inc.	3	82,610	0.7	%	$	8,826	1.8	%	48
16	Microsoft Corporation	2	313,485	2.5	%	$	8,178	1.6	%	67
17	TATA Communications (UK)	2	105,366	0.8	%	$	7,895	1.6	%	99
18	Carpathia Hosting	3	51,784	0.4	%	$	7,832	1.6	%	89
19	HSBC Bank PLC	1	113,464	0.9	%	$	7,316	1.5	%	168
20	Comverse Technology, Inc.	1	367,033	2.9	%	$	7,222	1.4	%	13
	Total/Weighted Average		6,274,944	49.9	%	$	283,252	56.7	%	93

(1) Occupied square footage is defined as leases that have commenced on or before December 31, 2009. For some of our properties, we calculate occupancy based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(2) Annualized rent represents the monthly contractual rent under existing leases as of December 31, 2009 multiplied by 12. We estimate the total net rentable square feet available for lease based on a number of factors in addition to contractually leased square feet, including available power, required support space and common area.

(3) Equinix Operating Company, Inc. announced its intention to acquire Switch & Data Facilities Company, Inc. on October 20, 2009. The pendinging acquisition, subject to government approval, is expected to close sometime in 2010. On a pro forma basis, total occupied square feet and annualized rent would be 706,154 and $28,444, respectively.

(4) Level 3 Communications includes Wiltel Communications & Broadwing Communications.

Page 21

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

UTILITY POWER CAPACITY ⁽¹⁾

Top 15 Properties

	Property Name	Market	Capacity (MW)
1	Devon Shafron Drive (3 Buildings)	Northern Virginia	225
2	350 East Cermak Road	Chicago	100
3	1500 Space Park (3 Buildings)	Santa Clara	59
4	3 Corporate Place	New York	44
5	114 Rue Ambroise Croizat	Paris, France	40
6	2045 & 2055 LaFayette Street	Silicon Valley	40
7	Datacenter Park - Dallas	Dallas	40
8	44470 Chilum Place	Northern Virginia	36
9	150 South First Street	Silicon Valley	36
10	101 Aquila Way	Atlanta	30
11	365 South Randolphville Road	New York	26
12	14901 FAA Boulevard	Dallas	25
13	2401 Walsh Street	Silicon Valley	25
14	2403 Walsh Street	Silicon Valley	25
15	4700 Old Ironsides Drive	Silicon Valley	25
	Total Potential Power Capacity - Top 15 Properties		776

(1) Utility Power Capacity is defined as the power that could potentially be provided by the utility company depending upon factors such as peak demand load at the property.

Page 22

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Lease Expirations and Lease Distribution

Lease Expirations

As of December 31, 2009

(Dollar amounts in thousands)

Year	Number of Leases Expiring (1)	Square Footage of Expiring Leases (2)	Percentage of Net Rentable Square Feet (2)		Annualized Rent (3)		Percentage of Annualized Rent		Annualized Rent Per Occupied Square Foot		Annualized Rent Per Occupied Square Foot at Expiration		Annualized Rent at Expiration ($000)
Available		634,657	5.0	%		—	0.0	%
2010	175	535,330	4.3	%	$	23,029	4.6	%	$	43.02	$	43.13	$	23,087
2011	99	1,250,698	9.9	%		30,724	6.2	%		24.57		25.03		31,307
2012	108	167,701	1.3	%		15,478	3.1	%		92.30		98.09		16,450
2013	77	990,130	7.9	%		48,321	9.7	%		48.80		53.55		53,022
2014	114	1,082,664	8.6	%		58,041	11.6	%		53.61		58.63		63,475
2015	89	1,975,985	15.7	%		67,724	13.6	%		34.27		37.59		74,283
2016	61	1,003,903	8.0	%		36,779	7.4	%		36.64		42.39		42,554
2017	35	551,012	4.4	%		17,036	3.4	%		30.92		37.00		20,388
2018	49	576,050	4.6	%		29,237	5.9	%		50.75		63.88		36,800
2019	45	1,372,014	10.9	%		73,702	14.8	%		53.72		64.94		89,097
Thereafter	121	2,433,490	19.4	%		99,209	19.7	%		40.77		55.53		135,136
Portfolio Total / Weighted Average	973	12,573,634	100.0	%	$	499,280	100.0	%	$	41.82	$	49.05	$	585,599

Lease Distribution

As of December 31, 2009

(Dollar amounts in thousands)

Square Feet Under Lease	Number of Leases (1)	Percentage of All Leases		Total Net Rentable Square Feet (2)	Percentage of Net Rentable Square Feet (2)		Annualized Rent (3)		Percentage of Annualized Rent
Available				634,657	5.0	%		—	—
2,500 or less	577	59.3	%	305,105	2.4	%	$	40,249	8.1	%
2,501 - 10,000	186	19.1	%	1,062,901	8.5	%		70,103	14.0	%
10,001 - 20,000	72	7.4	%	1,303,327	10.4	%		69,531	13.9	%
20,001 - 40,000	60	6.2	%	1,809,486	14.4	%		98,692	19.8	%
40,001 - 100,000	48	4.9	%	3,071,924	24.4	%		111,233	22.3	%
Greater than 100,000	30	3.1	%	4,386,234	34.9	%		109,472	21.9	%
Portfolio Total	973	100.0	%	12,573,634	100.0	%	$	499,280	100.0	%

(1) Includes license and similar agreements that upon expiration will be automatically renewed, mostly on a month-to-month basis. Number of leases represents the leased-unit count; a lease could include multiple units.

(2) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(3) Annualized rent represents the monthly contractual rent under existing leases as of December 31, 2009 multiplied by 12. We estimate the total net rentable square feet available for lease based on a number of factors in addition to contractually leased square feet, including available power, required support space and common area.

Page 23

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Lease Expirations - By Property Type

As of December 31, 2009

(Dollar amounts in thousands)

CORPORATE DATACENTERS

Year	Number of Leases Expiring (1)	Square Footage of Expiring Leases (2)	Percentage of Net Rentable Square Feet (2)		Annualized Rent (3)		Percentage of Annualized Rent		Annualized Rent Per Occupied Square Foot		Annualized Rent Per Occupied Square Foot at Expiration		Annualized Rent at Expiration ($000)
Available		304,899	2.4	%		—	0.0	%
2010	68	146,522	1.2	%	$	3,580	0.7	%	$	24.43	$	24.68	$	3,616
2011	34	514,382	4.1	%		6,570	1.3	%		12.77		13.08		6,726
2012	44	43,548	0.3	%		2,535	0.5	%		58.21		60.00		2,613
2013	32	604,569	4.8	%		30,000	6.0	%		49.62		54.50		32,950
2014	44	672,293	5.3	%		35,415	7.1	%		52.68		60.47		40,652
2015	31	766,878	6.1	%		25,910	5.2	%		33.79		35.50		27,221
2016	29	702,503	5.6	%		22,933	4.6	%		32.64		37.39		26,270
2017	8	128,405	1.0	%		6,302	1.3	%		49.08		61.58		7,907
2018	32	388,037	3.1	%		18,453	3.7	%		47.55		60.30		23,400
2019	38	1,256,802	10.0	%		66,390	13.3	%		52.82		64.07		80,521
Thereafter	65	1,851,024	14.7	%		58,039	11.6	%		31.36		40.96		75,824
Portfolio Total / Weighted Average	425	7,379,862	58.6	%	$	276,127	55.3	%	$	39.03	$	46.32	$	327,700
INTERNET GATEWAY DATACENTERS
Year	Number of Leases Expiring (1)	Square Footage of Expiring Leases (2)	Percentage of Net Rentable Square Feet (2)		Annualized Rent (3)		Percentage of Annualized Rent		Annualized Rent Per Occupied Square Foot		Annualized Rent Per Occupied Square Foot at Expiration		Annualized Rent at Expiration ($000)
Available		309,835	2.5	%		—	0.0	%
2010	105	263,270	2.1	%	$	16,532	3.3	%	$	62.79	$	62.87	$	16,553
2011	59	154,233	1.2	%		12,587	2.5	%		81.61		83.61		12,896
2012	64	124,153	1.0	%		12,943	2.6	%		104.25		111.45		13,837
2013	40	241,290	1.9	%		16,053	3.2	%		66.53		72.92		17,596
2014	70	410,371	3.3	%		22,626	4.5	%		55.14		55.62		22,824
2015	54	1,077,721	8.6	%		35,828	7.2	%		33.24		37.88		40,819
2016	31	301,400	2.4	%		13,822	2.8	%		45.86		53.94		16,259
2017	25	153,202	1.2	%		5,238	1.0	%		34.19		40.76		6,245
2018	17	188,013	1.5	%		10,784	2.2	%		57.36		71.28		13,401
2019	7	115,212	0.9	%		7,312	1.5	%		63.47		74.45		8,577
Thereafter	56	582,466	4.6	%		41,171	8.2	%		70.68		101.83		59,310
Portfolio Total / Weighted Average	528	3,921,166	31.2	%	$	194,896	39.0	%	$	53.97	$	63.22	$	228,317

(1) Includes license and similar agreements that upon expiration will be automatically renewed, mostly on a month-to-month basis. Number of leases represents the leased-unit count; a lease could include multiple units.

(2) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(3) Annualized rent represents the monthly contractual rent under existing leases as of December 31, 2009 multiplied by 12. We estimate the total net rentable square feet available for lease based on a number of factors in addition to contractually leased square feet, including available power, required support space and common area.

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DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Lease Expirations - By Property Type

As of December 31, 2009

(Dollar amounts in thousands)

TECHNOLOGY MANUFACTURING

Year	Number of Leases Expiring (1)	Square Footage of Expiring Leases (2)	Percentage of Net Rentable Square Feet (2)		Annualized Rent (3)		Percentage of Annualized Rent		Annualized Rent Per Occupied Square Foot		Annualized Rent Per Occupied Square Foot at Expiration		Annualized Rent at Expiration ($000)
Available		—	0.0	%		—	0.0	%
2010	1	—	0.0	%	$	61	0.0	%	$	—	$	—	$	61
2011	2	215,050	1.7	%		4,345	0.9	%		20.20		20.75		4,463
2012	—	—	0.0	%		—	0.0	%		—		—		—
2013	5	144,271	1.1	%		2,268	0.5	%		15.72		17.16		2,476
2014	—	—	0.0	%		—	0.0	%		—		—		—
2015	4	131,386	1.1	%		5,986	1.2	%		45.56		47.52		6,243
2016	1	—	0.0	%		23	0.0	%		—		—		26
2017	1	113,405	0.9	%		2,852	0.6	%		25.15		28.16		3,194
2018	—	—	0.0	%		—	0.0	%		—		—		—
2019	—	—	0.0	%		—	0.0	%		—		—		—
Thereafter	—	—	0.0	%		—	0.0	%		—		—		—
Portfolio Total / Weighted Average	14	604,112	4.8	%	$	15,535	3.2	%	$	25.72	$	27.25	$	16,463
TECHNOLOGY OFFICE
Year	Number of Leases Expiring (1)	Square Footage of Expiring Leases (2)	Percentage of Net Rentable Square Feet (2)		Annualized Rent (3)		Percentage of Annualized Rent		Annualized Rent Per Occupied Square Foot		Annualized Rent Per Occupied Square Foot at Expiration		Annualized Rent at Expiration ($000)
Available		19,923	0.2	%		—	0.0	%
2010	1	125,538	1.0	%	$	2,856	0.6	%	$	22.75	$	22.75	$	2,856
2011	4	367,033	2.9	%		7,222	1.4	%		19.68		19.68		7,222
2012	—	—	0.0	%		—	0.0	%		—		—		—
2013	—	—	0.0	%		—	0.0	%		—		—		—
2014	—	—	0.0	%		—	0.0	%		—		—		—
2015	—	—	0.0	%		—	0.0	%		—		—		—
2016	—	—	0.0	%		—	0.0	%		—		—		—
2017	1	156,000	1.3	%		2,644	0.5	%		16.95		19.50		3,042
2018	—	—	0.0	%		—	0.0	%		—		—		—
2019	—	—	0.0	%		—	0.0	%		—		—		—
Thereafter	—	—	0.0	%		—	0.0	%		—		—		—
Portfolio Total / Weighted Average	6	668,494	5.4	%	$	12,722	2.5	%	$	19.62	$	20.23	$	13,120

(1) Includes license and similar agreements that upon expiration will be automatically renewed, mostly on a month-to-month basis. Number of leases represents the leased-unit count; a lease could include multiple units.

(2) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(3) Annualized rent represents the monthly contractual rent under existing leases as of December 31, 2009 multiplied by 12. We estimate the total net rentable square feet available for lease based on a number of factors in addition to contractually leased square feet, including available power, required support space and common area.

Page 25

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Leasing Activity

As of December 31, 2009

	For the Three Months Ended December 31, 2009 (4)		% Leased (4)
Occupied Square Feet as of September 30, 2009 (1)	11,387,896			90.6	%
4Q 2009 Acquisitions:
1350 Duane Avenue & 3080 Raymond Street	185,000			1.5	%
Nokes Boulevard/Beaumeade Circle	331,613			2.6	%
Occupied Square Feet including 4Q 2009 Acquisitions (1)	11,904,509			94.7	%
Expirations, Terminations and Reductions	(54,910	)		(0.4	)%
New Leases and Expansions	90,944			0.7	%
Remeasurements (2)	(1,566	)		0.0	%
Occupied Square Feet as of December 31, 2009 (1)	11,938,977			95.0	%
GAAP Rent Growth (3)
Expiring Rent per Square Foot			$	29.12
New Rent per Square Foot			$	111.47
Percentage Increase				282.8	%
Weighted Average Lease Term - New (in months)				102

(1) Occupancy excludes space held for redevelopment.

(2) Represents remeasuring of building and/or specific areas to Building Owners and Managers Association (BOMA) standards.

(3) Represents estimated cash rent growth adjusted for straight-line rents in accordance with GAAP.

(4) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including available power, required support space and common area.

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DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Tenant Improvements and Leasing Commissions

	Three Months Ended								Full Year 2009		Full Year 2008
	12/31/2009		9/30/2009		6/30/2009		3/31/2009
Renewals (1)
Number of renewals		24		28		19		13		84		29
Square Feet (2)		244,005		453,840		308,205		163,216		1,169,266		151,114
Tenant improvement costs per square foot (3)	$	—	$	2.66	$	0.17	$	0.14	$	1.10	$	2.17
Leasing commission costs per square foot (3)	$	2.84	$	7.35	$	10.26	$	6.04	$	6.99	$	6.72
Total renewal lease costs per square foot	$	2.84	$	10.01	$	10.43	$	6.18	$	8.09	$	8.89
New Leases (4)
Number of non-redevelopment leases		10		8		17		12		47		64
Non-Redevelopment square feet (2)		39,486		2,289		35,875		121,926		199,576		257,354
Non-Redevelopment tenant improvement costs per square foot (3)	$	4.59	$	28.40	$	12.97	$	0.57	$	3.91	$	12.87
Non-Redevelopment leasing commission costs per square foot (3)	$	4.96	$	11.55	$	12.42	$	2.79	$	5.05	$	10.97
Number of redevelopment leases		13		17		10		16		56		78
Redevelopment square feet (2)		51,458		98,229		79,255		328,538		557,480		912,942
Redevelopment tenant improvement costs per square foot (3) (5)	$	—	$	5.09	$	14.89	$	1.35	$	3.81	$	2.97
Redevelopment leasing commission costs per square foot (3)	$	20.29	$	12.74	$	20.67	$	12.39	$	14.36	$	11.79
Total Number of Leases		23		25		27		28		103		142
Total Square Feet (2)		90,944		100,518		115,130		450,464		757,056		1,170,296
Total new lease costs per square foot	$	15.63	$	18.33	$	32.39	$	10.93	$	15.74	$	16.76
Total (6)
Number of leases		47		53		46		41		187		171
Square Feet (2)		334,949		554,358		423,335		613,680		1,926,321		1,321,410
Tenant improvement costs per square foot (3)	$	0.54	$	3.20	$	4.01	$	0.87	$	2.17	$	4.81
Leasing commission costs per square foot (3)	$	5.77	$	8.32	$	12.39	$	8.79	$	8.92	$	11.05
Total costs per square foot	$	6.31	$	11.52	$	16.40	$	9.66	$	11.09	$	15.86

(1) Does not include retained tenants that have relocated to new space or expanded into new space.

(2) For some of our properties, we calculate square footage based on factors in addition to contractually leased square feet, including available power, required support space and common area.

(3) Assumes all tenant improvement and leasing commissions are paid in the calendar year in which the lease commences, which may be different than the year in which they are actually paid.

(4) Includes retained tenants that have relocated to new space or expanded into new space within our portfolio.

(5) Redevelopment Tenant Improvement costs include tenant-specific building improvements for square footage designated as space held for redevelopment; however, it does not include redevelopment costs.

(6) Recent property acquisitions may make a period over period comparison difficult. For a list of the acquisition dates of our properties see page 18.

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DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Historical Capital Expenditures

	Three Months Ended
	12/31/2009		9/30/2009		6/30/2009		3/31/2009		12/31/2008		9/30/2008		6/30/2008		3/31/2008
Recurring capital expenditures (1) (2)	$	7,049,000	$	4,803,000	$	9,628,000	$	4,779,000	$	7,380,000	$	5,489,000	$	5,272,000	$	7,349,000
Non-recurring capital expenditures (2)	$	56,967,000	$	66,272,000	$	88,605,000	$	125,530,000	$	135,646,000	$	128,204,000	$	138,379,000	$	86,040,000
Total net rentable square feet at period end excluding redevelopment space		12,573,634		11,964,522		11,854,886		11,784,573		11,387,102		11,244,657		10,977,945		10,795,795

(1) Recurring capital expenditures represents non-incremental building improvements required to maintain current revenues along with leasing commissions. Recurring capital expenditures do not include acquisition capital that was taken into consideration when underwriting the purchase of a building or which are incurred to bring a building up to “operating standard”.

(2) Recent property acquisitions may make a period over period comparison difficult. For a list of the acquisition dates of our properties see page 18.

Page 28

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Redevelopment Activity

For the quarter ended December 31, 2009

(Square feet)

Activity for the quarter ended December 31, 2009	US		Europe		Total		% Leased (1)
Redevelopment Space as of September 30, 2009	1,675,243		201,642		1,876,885
Acquired Redevelopment Space and New Construction Space	—		30,612		30,612
Converted Redevelopment Space:
Turn-Key Datacenter®	(75,083	)	(35,912	)	(110,995	)	33.4	%
Powered Base Building®	(9,404	)	(2,712	)	(12,116	)	100.0	%
Remeasurement Adjustments	—		—		—
Redevelopment Space as of December 31, 2009	1,590,756		193,630		1,784,386
Redevelopment Space Under Construction at Quarter End	US		Europe		Total		% Leased (2)
Turn-Key Datacenter®	70,426		16,988		87,414		72.8	%
Build-to-Suit	—		—		—
New Powered Base Building® Shell	—		—		—
Redevelopment Space Under Construction as of December 31, 2009	70,426		16,988		87,414
New Development Space Under Construction at Quarter End (3)	US		Europe		Total
New Powered Base Building® Shell	135,000		—		135,000

(1) Defined as leases that have commenced on or before December 31, 2009.

(2) Defined as leases that were signed on or before December 31, 2009.

(3) Not included as part of our redevelopment space inventory as of December 31, 2009.

Page 29

DIGITAL REALTY TRUST, INC.

Fourth Quarter 2009

Management Statements on Non-GAAP Supplemental Measures

Funds from Operations:

We calculate Funds from Operations, or FFO, in accordance with the standards established by the National Association of Real Estate Investment Trusts, or NAREIT. FFO represents net income (loss) (computed in accordance with GAAP), excluding gains (or losses) from sales of property, real estate related depreciation and amortization (excluding amortization of deferred financing costs) and after adjustments for unconsolidated partnerships and joint ventures. Management uses FFO as a supplemental performance measure because, in excluding real estate related depreciation and amortization and gains and losses from property dispositions, it provides a performance measure that, when compared year over year, captures trends in occupancy rates, rental rates and operating costs. We also believe that, as a widely recognized measure of the performance of REITs, FFO will be used by investors as a basis to compare our operating performance with that of other REITs. However, because FFO excludes depreciation and amortization and captures neither the changes in the value of our properties that result from use or market conditions, nor the level of capital expenditures and capitalized leasing commissions necessary to maintain the operating performance of our properties, all of which have real economic effect and could materially impact our financial condition and results from operations, the utility of FFO as a measure of our performance is limited. Other REITs may not calculate FFO in accordance with the NAREIT definition and, accordingly, our FFO may not be comparable to such other REITs’ FFO. Accordingly, FFO should be considered only as a supplement to net income as a measure of our performance.

Adjusted Funds From Operations:

We present adjusted funds from operations, or AFFO, as a supplemental operating measure because, when compared year over year, it assesses our ability to fund dividend and distribution requirements from our operating activities. We also believe that, as a widely recognized measure of the operations of REITs, AFFO will be used by investors as a basis to assess our ability to fund dividend payments in comparison to other REITs, including on a per share and unit basis. We calculate adjusted funds from operations, or AFFO, by adding to or subtracting from FFO (i) non-real estate depreciation, (ii) amortization of deferred financing costs (iii) noncash compensation (iv) straight line rents (v) fair value of lease revenue amortization (vi) capitalized leasing payroll (vii) recurring tenant improvements and (viii) capitalized leasing commissions. Other equity REITs may not calculate AFFO in a consistent manner. Accordingly, our AFFO may not be comparable to other equity REITs’ AFFO. AFFO should be considered only as a supplement to net income computed in accordance with GAAP as a measure of our performance.

EBITDA and Adjusted EBITDA:

We believe that earnings before interest expense, income taxes, depreciation and amortization, or EBITDA and Adjusted EBITDA (as defined below), are useful supplemental performance measures because they allow investors to view our performance without the impact of noncash depreciation and amortization or the cost of debt and with respect to Adjusted EBITDA preferred dividends and minority interests. Adjusted EBITDA is EBITDA excluding minority interests and preferred stock dividends. In addition, we believe EBITDA and adjusted EBITDA are frequently used by securities analysts, investors and other interested parties in the evaluation of REITs. Because EBITDA and adjusted EBITDA are calculated before recurring cash charges including interest expense and income taxes, exclude capitalized costs, such as leasing commissions, and are not adjusted for capital expenditures or other recurring cash requirements of our business, their utility as a measure of our performance is limited. Accordingly, EBITDA and Adjusted EBITDA should be considered only as supplements to net income (computed in accordance with GAAP) as a measure of our financial performance. Other equity REITs may calculate EBITDA and Adjusted EBITDA differently than we do; accordingly, our EBITDA and Adjusted EBITDA may not comparable to such other REITs’ EBITDA and Adjusted EBITDA.

NOI and Run-rate NOI:

Net Operating Income (NOI)

NOI represents rental revenue and tenant reimbursement revenue less rental property operating and maintenance, property taxes and insurance expenses (as reflected in statement of operations). NOI is commonly used by stockholders, company management and industry analysts as a measurement of operating performance of the company’s rental portfolio. However, because NOI excludes depreciation and amortization and captures neither the changes in the value of our properties that result from use or market conditions, nor the level of capital expenditures and capitalized leasing commissions necessary to maintain the operating performance of our properties, all of which have real economic effect and could materially impact our results from operations, the utility of NOI as a measure of our performance is limited. Other REITs may not calculate NOI in the same manner we do and, accordingly, our NOI may not be comparable to such other REITs’ NOI. Accordingly, NOI should be considered only as a supplement to net income as a measure of our performance.

Run-rate NOI:

Run-rate NOI represents NOI as defined above adjusted for new acquisitions to show an estimate of NOI as if the property had been owned for the entire quarter. Run-rate NOI is commonly used by stockholders, company management and industry analysts as a measurement of future operating performance of the company’s rental portfolio. Run-rate NOI may not be indicative of future performance. Actual performance is subject to risks, uncertainties and assumptions. See the discussion of forward-looking statements on page 3.

Page 30