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Mark One UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K 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 to Commission file number 000-50056 MARTIN MIDSTREAM PARTNERS L.P. ( Exact name of registrant as specified in its charter ) Delaware State or other jurisdiction of incorporation or organization 4200 Stone Road Kilgore , Texas 75662 ( Address of principal executive offices ) ( Zip Code ) 903-983-6200 ( Registrant's telephone number , including area code ) Title of each class Common Units representing limited partnership interests mmlp Securities Registered Pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) ( I.R.S. Employer Identification No. ) MMLP 05-0527861 Securities Registered Pursuant to Section 12 ( g ) of the Act : NONE Yes > Name of each exchange on which registered The NASDAQ Global Select Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . No 冈 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 No | 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 the past 90 days .