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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 December 31 , 2020 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number : 000-32929 Large accelerated filer Non - accelerated filer Delaware ( State or other jurisdiction of incorporation or organization ) MOSYS , INC . ( Exact name of registrant as specified in its charter ) 2309 Bering Drive San Jose , California 95131 ( Address of principal executive offices ) 风口 ( 408 ) 418-7500 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) MOSY Title of each class Common Stock , par value $ 0.001 per share 77-0291941 ( IRS Employer Identification Number ) Securities registered pursuant to Section 12 ( g ) of the Act : Title of each class Series AA Preferred Stock , par value $ 0.01 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 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 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 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 : Name of each exchange on which registered The Nasdaq Stock Market , LLC Name of each exchange on which registered None Accelerated filer Smaller reporting company Emerging growth company □□□ 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 . o 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 voting and non - voting common equity held by non - affiliates of the Registrant , based on the closing price of the shares of common stock on the Nasdaq Capital Market on June 30 , 2020 was $ 6,427,310 . The number of shares of Registrant's Common Stock outstanding , par value $ 0.001 per share , as of March 12 , 2021 , was 6,133,719 .