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0 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 FORM 10 - K TRANSITION REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from : OR Commission file number : 001-33675 Nevada ( State or other jurisdiction of Incorporation or organization ) 202 6th Street , Suite 401 , Castle Rock , CO ( Address of principal executive offices ) RIOT BLOCKCHAIN , INC . ( Exact name of registrant as specified in its charter ) Securities registered under Section 12 ( b ) of the Exchange Act : to : Large accelerated filer Non - accelerated filer > Emerging growth company RIOT 84-1553387 Registrant's telephone number , including area code ( 303 ) 794-2000 ( Trading Symbol ) ( I.R.S. Employer Identification No. ) 80104 Common Stock no par value per share ( Title of class ) Securities registered pursuant to Section 12 ( g ) of the Securities Exchange 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 Exchange Act : Yes No Note - Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15 ( d ) of the Exchange Act from their obligations under those Sections . ( Zip Code ) The Nasdaq Capital Market ( Name of each exchange on which registered ) Indicate by check mark whether the registrant ( 1 ) filed all reports required to be filed by Section 13 or 15 ( d ) of the Exchange Act 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 definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Accelerated filer □ Smaller reporting company