DIGITAL REALTY TRUST, INC. 12,000,000 Shares Underwriting AgreementDigital Realty Trust, Inc. • February 5th, 2008 • Real estate investment trusts • New York
Digital Realty Trust, Inc., a corporation organized under the laws of the State of Maryland (the “Company”), proposes to sell to the several underwriters named in Schedule II hereto (the “Underwriters”), for whom you (the “Representatives”) are acting as representatives, the number of shares of 5.500% Series D Cumulative Convertible Preferred Shares (Liquidation Preference $25.00 Per Share) (the “Convertible Preferred Stock”), of the Company set forth in Schedule I hereto (said shares to be issued and sold by the Company being hereinafter called the “Underwritten Securities”). The Company also proposes to grant to the Underwriters an option to purchase up to the number of additional shares of Convertible Preferred Stock set forth in Schedule I hereto to cover over-allotments (the “Option Securities”; the Option Securities, together with the Underwritten Securities, being hereinafter called the “Securities”). The Convertible Preferred Stock will be established by the Articles Supplement
