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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 EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31 , 2020 [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM ΤΟ Nevada ( State or other jurisdiction of incorporation or organization ) OR SURNA INC . ( Exact name of registrant as specified in its charter ) 1780 55th Street , Boulder , Colorado ( Address of principal executive offices ) Commission File Number : 000-54286 Securities registered pursuant to Section 12 ( b ) of the Exchange Act : Title of each class N / A Large Accelerated Filer Non - accelerated Filer ( 303 ) 993-5271 ( Registrant's telephone number , including area code ) Trading Symbol ( s ) 27-3911608 ( I.R.S. Employer Identification No. ) N / A [ ] [ X ] 80301 ( Zip code ) Name of each exchange on which registered N / A Securities registered pursuant to Section 12 ( g ) of the Act : Title of Each Class Registered Common stock , par value $ 0.00001 per share 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 Section 15 ( d ) of the Act . Yes [ ] No [ X ] . Indicate by check mark whether the issuer ( 1 ) has 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 last 90 days . Yes [ X ] 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 [ X ] 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 , " " non - accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Accelerated Filer Smaller Reporting Company Emerging Growth Company [ ] [ X ] [ ]