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): March 11, 2015

Federal Realty Investment Trust

(Exact name of registrant as specified in its charter)

1626 East Jefferson Street

Rockville, Maryland 20852-4041

(301) 998-8100

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

(Former name or former address, if changed since last report)

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:

On March 11, 2015, Federal Realty Investment Trust (the “Registrant”) entered into an underwriting agreement with Wells Fargo Securities, LLC, Deutsche Bank Securities Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as representatives of the several underwriters named in Schedule I to the related pricing agreement, whereby the Registrant agreed to issue and sell $200,000,000 aggregate principal amount of 4.50% Notes due 2044 (the “Notes”) in an underwritten public offering. The Notes are of the same series as the 4.50% Notes due 2044 that the Registrant first issued on November 14, 2014. The Notes will be governed by the Indenture, dated as of September 1, 1998, between the Registrant and U.S. Bank National Association (successor trustee to Wachovia Bank, National Association (successor trustee to First Union National Bank)). The offering closed on March 16, 2015.

The Notes will be senior unsecured obligations of the Registrant and will rank equally with all of the Registrant’s other senior unsecured indebtedness. The Notes will bear interest at 4.50% per annum, and interest will be payable on June 1 and December 1 of each year, beginning on June 1, 2015. The Notes will mature on December 1, 2044.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

SIGNATURE

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 hereunto duly authorized.