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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , DC 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 to Maryland ( State or other jurisdiction of incorporation of organization ) or Commission file number 001-38106 PLYMOUTH INDUSTRIAL REIT , INC . ( Exact name of registrant in its charter ) Title of Each Class Common Stock , par value $ 0.01 per share 7.50 % Series A Cumulative Redeemable Preferred Stock , par value $ 0.01 per share Large accelerated filer Emerging growth company 20 Custom House St , 11th Floor Boston , MA 02110 ( Address of principal executive offices ) Registrant's telephone number , including area code : ( 617 ) 340-3814 Securities registered pursuant to Section 12 ( b ) of the Act : 27-5466153 ( I.R.S. Employer Identification Number ) Trading Symbol PLYM PLYM - PRA 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 15 ( d ) of the Act . Yes ☐ No 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 Accelerated filer ☐ 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 non - accelerated filer , a smaller reporting company , or 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 . Name of Each Exchange on Which Registered New York Stock Exchange NYSE American Non - accelerated filer Smaller reporting 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 . □ No m Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) Yes The aggregate market value of the registrant's common stock held by non - affiliates of the registrant ( based on the closing price reported on the NYSE on June 30 , 2020 ) was $ 200,308,467 . The number of shares of the registrant's common stock outstanding as of February 22 , 2021 was 28,113,917 . DOCUMENTS INCORPORATED BY REFERENCE Shares held by all executive officers and directors of the registrant have been excluded from the foregoing calculation because such persons may be deemed to be affiliates of the registrant . Portions of the registrant's Definitive Proxy Statement relating to its 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10 - K . The registrant expects to file its Definitive Proxy Statement with the Securities and Exchange Commission within 120 days after December 31 , 2020 .