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Table of Contents 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 Commission File Number : 000-50175 to DORCHESTER MINERALS , L.P. Delaware ( Exact name of registrant as specified in its charter ) ( State or other jurisdiction of incorporation or organization ) 81-0551518 ( I.R.S. Employer Identification No. ) 3838 Oak Lawn Avenue , Suite 300 Dallas , Texas 75219 ( Address of principal executive offices ) ( Zip Code ) ( 214 ) 559-0300 ( Registrant's telephone number , including area code ) SECURITIES REGISTERED PURSUANT TO SECTION 12 ( b ) OF THE ACT : Title of each class Common Units Representing Limited Partnership Interest Trading Symbol ( s ) DMLP Name of each exchange on which registered NASDAQ Global Select Market SECURITIES REGISTERED PURSUANT TO SECTION 12 ( g ) OF THE ACT : Title of Class 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 □ 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 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 ☐ Accelerated filer Smaller reporting company Emerging growth company □ ☑ Non - accelerated filer ☑ 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 . ☐ 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 common units held by non - affiliates of the registrant ( treating all managers , executive officers and 10 % unitholders of the registrant as if they may be affiliates of the registrant ) was approximately $ 407,429,292 as of the last business day of the registrant's most recently completed second fiscal quarter , based on $ 12.78 per unit , the closing price of the common units as reported on the NASDAQ Global Select Market on such date . Number of Common Units outstanding as of February 25 , 2021 : 34,679,774 DOCUMENTS INCORPORATED BY REFERENCE Portions of the definitive proxy statement for the registrant's 2021 Annual Meeting of Unitholders to be held on May 19 , 2021 , are incorporated by reference in Part III of this Form 10 - K . Such definitive proxy statement will be filed with the Securities and