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( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Washington ( State or other jurisdiction of incorporation ) Title of each class Common Stock or Commission file number : 0-10394 DATA I / O CORPORATION ( Exact name of registrant as specified in its charter ) Accelerated filer Large accelerated filer Non - accelerated filer 6645 185th Ave NE , Suite 100 , Redmond , Washington , 98052 ( 425 ) 881-6444 ( Address , including zip code , of registrant's principle executive offices and telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act Trading Symbol ( s ) DAIO ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( g ) of the Act None No X No > Indicate by check mark whether the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark whether the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes 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 . Smaller reporting company Emerging growth company 91-0864123 Name of each exchange on which registered NASDAQ ☐ 8,421,599 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 Exchange Act ) . Yes No Aggregate market value of voting and non - voting common equity held by non - affiliates on the registrant as of June 30 , 2020 : $ 27,952,330 Shares of Common Stock , no par value , outstanding as of March 22 , 2021 : DOCUMENTS INCORPORATED BY REFERENCE