Summary of WINTHROP REALTY TRUST

Item 1.01. Entry into a Material Definitive Agreement

Issuance of 7.75% Senior Notes

On August 24, 2012, in connection with the exercise in full of the underwriters' over-allotment option, Winthrop Realty Trust. (the "Company") issued and sold an additional $11.25 million aggregate principal amount of its 7.75% Senior Notes due 2012 (the "Additional Notes"). The Additional Notes were issued pursuant to an indenture, dated as of August 6, 2012 (the "Base Indenture"), and a first supplemental indenture thereto, dated as of August 15, 2012 (the "Supplemental Indenture" and, together with the Base Indenture, the "Indenture"), each between the Company and the Bank of New York Mellon, as trustee (the "Trustee").

The Additional Notes, together with the $75.0 million aggregate principal amount of the Company's 7.75% Senior Notes due 2012 (the "Original Notes" and, together with the Additional Notes, the "Notes") bear interest at a rate of 7.75% per year on the principal amount, accruing from August 15, 2012. Interest is payable quarterly in arrears on February 15, May 15, August 15 and November 15 of each year, beginning on November 15, 2012. The Notes will mature on August 15, 2022, unless previously redeemed or repurchased in accordance with their terms prior to such date.

For a more detailed description of the Notes, please see item 1.01 of the Company's Current Report on Form 8-K filed with the Securities and Exchange Commission on August 15, 2012 (the "August 15 8-K"), which description is incorporated herein by reference.

WRT Note

Upon the issuance of the Additional Notes, the Company loaned the net proceeds of the offering to WRT Realty L.P. ("WRT"), its wholly-owned subsidiary, which will use such proceeds to fund future acquisitions and/or for general working capital purposes, including funding capital expenditures, tenant improvements and leasing commissions. The loan is evidenced by a promissory note (payable to the Company in the principal amount of $11.25 million (the "Additional WRT Note") and containing the same interest payment terms and maturity dates as the Notes. The Additional WRT Note will be pari passu with all existing and future unsecured senior indebtedness of WRT including the previously issued $75.0 million note from WRT to the Company issued in connection with the issuance of the Original Notes. Pursuant to the terms of the WRT Note, upon any acceleration of the Notes, the indebtedness represented by the WRT Note will be simultaneously and automatically accelerated.

The descriptions of the Supplemental Indenture, the Notes, the WRT Note and the Pledge Agreement contained herein are qualified in their entirety by reference to the full text of the Supplemental Indenture, the form of Note, and the WRT Note, copies of which are attached as Exhibit 4.1, 4.2, 10.1 and 10.2, respectively, to the August 15 8-K and are incorporated herein by reference. For a more detailed description of the Supplemental Indenture, the Notes, and the WRT Note see the disclosure under the caption "Description of Notes" contained in the Company's prospectus, dated August 8, 2012, which has been filed with the Securities and Exchange Commission pursuant to Rule 424(b) under the Securities Act of 1933, as amended, which disclosure is hereby incorporated by reference.