Page 1

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the 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 Form 10 - K Nevada ( State or other jurisdiction of incorporation or organization ) 9555 Maroon Circle , Englewood , CO ( Address of principal executive offices ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , $ 0.001 par value per share Commission file number 001-38804 ( Exact name of registrant as specified in its charter ) to ZYNEX , INC . Registrant's telephone number , including area code : ( 303 ) 703-4906 Ticker symbol ( s ) ZYXI 90-0275169 ( IRS Employer Identification No. ) 80112 ( Zip Code ) Securities registered pursuant to Section 12 ( g ) of the Act : Title of each class Common Stock , $ 0.001 par value Name of each exchange on which registered The Nasdaq Stock Market LLC Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . □ Yes 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 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 > No Accelerated filer Smaller reporting company Emerging growth company 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 . Large accelerated filer Non - accelerated filer 0 0 IXI 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 Act ) . Yes > No The aggregate market value of the registrant's common stock held by non - affiliates of the registrant as of June 30 , 2020 , the last business day of the Registrant's last completed second quarter , based upon the closing price of the common stock as reported by the Nasdaq Stock Market on such date was approximately $ 422.4 million . As of February 25 , 2021 , 36,135,103 shares of common stock are issued and 34,849,482 shares are outstanding . Documents incorporated by reference : Portions of the Registrant's definitive proxy statement relating to its 2021 annual meeting of shareholders ( the " Proxy Statement " ) are incorporated by reference into Part III of this Annual Report on Form 10 - K where indicated . The Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates .