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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) X ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission File Number : 001-36735 Landmark Infrastructure Partners LP ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 400 Continental Blvd , Suite 500 , P.O. Box 3429 El Segundo , CA 90245 ( Address of principal executive offices ) Title of each class Common Units , Representing Limited Partner Interests 8.0 % Series A Cumulative Redeemable Preferred Units , $ 25.00 par value 7.9 % Series B Cumulative Redeemable Preferred Units , $ 25.00 par value Series C Floating - to - Fixed Rate Cumulative Redeemable Perpetual Convertible Preferred Units , $ 25.00 par value to Trading Symbol ( s ) LMRK LMRKP LMRKO ( 310 ) 598-3173 ( Registrant's telephone number , including area code ) N / A ( Former name , former address and former fiscal year , if changed since last report ) Securities Registered Pursuant to Section 12 ( b ) of the Act : 61-1742322 ( I.R.S. Employer Identification No. ) 90245 ( Zip Code ) The registrant had 25,488,992 common units outstanding at February 18 , 2021 . Name of each exchange on which registered NASDAQ Global Market NASDAQ Global Market NASDAQ Global Market NASDAQ Global Market LMRKN No | No 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 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 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 non - accelerated filer , smaller reporting company , or an emerging growth company . See 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 Accelerated filer Non - accelerated filer 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 . No | 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 equity held by non - affiliates of the registrant on June 30 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , based on the closing price on that date of $ 9.90 , was approximately $ 252 million . DOCUMENTS INCORPORATED BY REFERENCE None