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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Maryland ( State or other jurisdiction of incorporation or organization ) FRANKLIN STREET PROPERTIES CORP . ( Exact name of registrant as specified in its charter ) to Commission File No. 001-32470 401 Edgewater Place , Suite 200 , Wakefield , Massachusetts ( Address of principal executive offices ) Title of each class : Common Stock , $ .0001 par value per share 04-3578653 ( I.R.S. Employer Identification No. ) 01880 ( Zip Code ) Registrant's telephone number , including area code : ( 781 ) 557-1300 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) FSP Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes □ No > . Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No . Name of each exchange on which registered : NYSE American Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No. Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( § 232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes > No. Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a on - accelerated filer , a smaller reporting company or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Non - accelerated filer Accelerated filer X Smaller reporting company 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 Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . X Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No . The aggregate market value of the voting and non - voting common equity held by non - affiliates based on the closing sale price as reported on NYSE American , as of the last business day of the registrant's most recently completed second fiscal quarter , June 30 , 2020 , was approximately $ 523,709,269 . There were 107,328,199 shares of common stock of the registrant outstanding as of February 5 , 2021 . Documents incorporated by reference : The registrant intends to file a definitive proxy statement pursuant to Regulation 14A , promulgated under the Securities Exchange Act of 1934 , as amended , to be used in connection with the registrant's Annual Meeting of Stockholders to be held on May 13 , 2021 ( the " Proxy Statement " ) . The information required in response to Items 10-14 of Part III of this Form 10 - K , other than that contained in Part I under the caption , " Information about our Executive Officers , " is hereby incorporated by reference to the Proxy Statement .