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

January 20, 2016

Date of Report (Date of Earliest Event Reported)

SOVRAN SELF STORAGE, INC.

(Exact Name of Registrant as Specified in Its Charter)

6467 Main Street

Williamsville, New York 14221

(Address of Principal Executive Offices)

(716) 633-1850

(Registrants’ 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 registrants under any of the following provisions (see General Instruction A.2. below):

On January 20, 2016, Sovran Self Storage, Inc., or the Company, entered into an underwriting agreement (the “Underwriting Agreement”) with Wells Fargo Securities, LLC and Jefferies LLC, as representative of the several underwriters (the “Underwriters”), pursuant to which the Company agreed to issue and sell 2,300,000 shares of the Company’s common stock, par value $.01 per share, plus up to an additional 345,000 shares of common stock pursuant to the underwriters’ option, at a price to the public of $105.75 per share. The offering of 2,300,000 shares of the Company’s common stock will close on January 25, 2016. Net proceeds to the Company from the offering of 2,300,000 shares, before expenses, will be $234,712,125.

The Company made certain customary representations, warranties and covenants in the Underwriting Agreement and also agreed to indemnify the Underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended. A copy of the Underwriting Agreement is filed as Exhibit 1.1 to this Current Report on Form 8-K and incorporated herein by reference.

The Company will use the net proceeds to fund a portion of the Company’s pending property acquisitions and repay certain borrowings under its line of credit that were incurred primarily in connection with property acquisitions. Affiliates of certain of the underwriters are lenders under such line of credit, and upon repayment of such line of credit in connection with the offering, such affiliates will receive a portion of the proceeds through repayment of those borrowings.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

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