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( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K [ X ] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( D ) OF THE SECURITIES AND EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( D ) OF THE SECURITIES AND EXCHANGE ACT OF 1934 For the transition period from Nevada ( State or other jurisdiction of incorporation ) Title of each class Common Stock or MARATHON DIGITAL HOLDINGS , INC . ( Exact Name of Registrant as Specified in Charter ) 1180 North Town Center Drive , Suite 100 , Las Vegas , NV ( Address of principal executive offices ) 001-36555 ( Commission File Number ) Large Accelerated Filer Non - accelerated Filer Emerging growth company to Registrant's telephone number , including area code : 702-945-2773 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) MARA Name of each exchange on which registered The Nasdaq Capital Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act Yes [ ] No [ X ] 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 [ X ] 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 [ X ] No [ ] [ ] [ X ] [ ] 01-0949984 ( IRS Employer Identification No. ) 89144 ( Zip Code ) 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 [ X ] 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 the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company " and " emerging growth company ” in Rule 12b - 2 of the Exchange Act . [ X ] Accelerated Filer Smaller Reporting Company [ ] [ X ] 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 is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) Yes [ ] No [ X ]