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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , DC 20549 Form 10 - K ( 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 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number : 000-52024 ALPHATEC HOLDINGS , INC . ( Exact Name of Registrant as Specified in its Charter ) Delaware ( State or Other Jurisdiction of Incorporation or Organization ) 1950 Camino Vida Roble , Carlsbad , California ( Address of Principal Executive Offices ) Title of Each Class Common Stock , par value $ 0.0001 per share 20-2463898 ( I.R.S. Employer Identification No. ) ( 760 ) 431-9286 ( Registrant's Telephone Number , Including Area Code ) Securities registered pursuant to Section 12 ( b ) of the Exchange Act : Trading Symbol ( s ) ATEC Securities registered pursuant to Section 12 ( g ) of the Exchange Act : None Large accelerated filer Non - accelerated filer 92008 ( Zip Code ) Name of Each Exchange on Which Registered The NASDAQ Global Select Market No 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 15 ( d ) of the Exchange 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 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 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 . X 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 a check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No The aggregate market value of the registrant's common stock held by non - affiliates of the registrant ( without admitting that any person whose shares are not included in such calculation is an affiliate ) computed by reference to the price at which the common stock was last sold as of the last business day of the registrant's most recently completed second fiscal quarter ( June 30 , 2020 ) , was approximately $ 208.5 million . The number of outstanding shares of the registrant's common stock , par value $ 0.0001 per share , as of March 1 , 2021 was 95,149,633 . DOCUMENTS INCORPORATED BY REFERENCE The following documents ( or parts thereof ) are incorporated by reference into the following parts of this Form 10 - K : Certain information required in Part III of this Annual Report on Form 10 - K is incorporated from the Registrant's Proxy Statement for the 2021 Annual Meeting of Stockholders .