Release Details

SAN FRANCISCO, May 23 /PRNewswire-FirstCall/ -- Digital Realty Trust, Inc. (NYSE: DLR), the leading owner and manager of corporate data centers and Internet gateways, announced today that it has commenced a follow-on public offering comprised of 4,000,000 primary shares for approximately $95 million of net proceeds. The sole book runner for this offering is Citigroup Corporate and Investment Banking. The Company has granted the underwriter a 30-day option to purchase up to an additional 600,000 shares to cover over-allotments, if any.

The Company intends to use the net proceeds from this offering to temporarily reduce borrowings under its unsecured credit facility. Consistent with the Company's growth strategy, the Company is actively pursuing multiple opportunities for potential acquisitions, with due diligence and negotiations at different stages of advancement. The Company intends to reborrow amounts under its revolving credit facility from time to time to fund acquisitions and for general corporate purposes.

Copies of the final prospectus supplement, when available, may be obtained from the offices of Citigroup, 390 Greenwich Street, New York, New York 10013.

This news release shall not constitute an offer to sell or the solicitation of any offer to buy nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. owns, acquires, repositions and manages technology-related real estate. The Company's 49 properties contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise data center tenants. Comprising approximately 10.0 million rentable square feet, including 1.2 million square feet of space held for redevelopment, Digital Realty Trust's property portfolio is located throughout the United States and Europe with one property in Canada. For additional information, please visit the Company's website at 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 expected closing date of the offering and the expected use of the net proceeds. For a further list and description of risks and uncertainties facing the Company, 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, 2005. 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.

    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.                (415) 738-6532
    (415) 738-6500

SOURCE  Digital Realty Trust, Inc.
    -0-                             05/23/2006
    /CONTACT:  A. William Stein, Chief Financial Officer and Chief Investment
Officer, +1-415-738-6500, or Investor/Analyst Information, Pamela Matthews,
+1-415-738-6532, both of Digital Realty Trust, Inc./
    /Web site:  http://www.digitalrealtytrust.com /
    (DLR)

CO:  Digital Realty Trust, Inc.
ST:  California
IN:  CPR FIN MLM RLT
SU:  OFR

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0977 05/23/2006 16:49 EDT http://www.prnewswire.com