FRANKLIN STREET PROPERTIES CORP /MA/

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): July 8, 2026

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Franklin Street Properties Corp.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (781)557-1300

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(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 (see General Instruction A.2. below):

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

On July 8, 2026, FSP Greenwood Plaza Corp. (the “Seller”), a wholly-owned subsidiary of Franklin Street Properties Corp. (the “Registrant”), closed on the sale of the office buildings located at 6550 and 6560 Greenwood Plaza Boulevard, Englewood, Colorado containing approximately 196,236 square feet (the “Property”) to University of Colorado Health (the “Buyer”), pursuant to a Purchase and Sale Agreement dated May 26, 2026, as amended by a First Amendment to Purchase and Sale Agreement dated June 30, 2026 (as amended, the “Agreement”). There were no material relationships, other than in respect of the Agreement, among the Seller and the Buyer, or any of their respective affiliates. The gross purchase price for the Property was $19,356,000. The Registrant used approximately $8,500,000 of the proceeds from the sale of the Property for the repayment of debt, including interest and fees, with the balance to be retained by the Registrant and available to fund tenant improvements, leasing commissions, building improvements and other general corporate uses.

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(b)Pro forma financial information.

The pro forma financial information of the Registrant as adjusted to give effect to the sale of the Property is presented in the unaudited pro forma condensed consolidated financial statements filed as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

(d)Exhibits.

The following exhibits are filed herewith:

**EXHIBIT NO.**DESCRIPTION OF EXHIBITS

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.