X0306 4/A 2016-12-12 2016-12-16 0 0001350653 Alphatec Holdings, Inc. ATEC 0001620013 Williams Donald Allen C/O ALPHATEC SPINE, INC. 5818 EL CAMINO REAL CARLSBAD CA 92008 1 0 0 0 Common Stock 36034 D On December 16, 2016, the reporting person mistakenly reported in Box 5 of Table I that he beneficially owned a total of 3,002 shares of issuer's common stock. This amendment is being filed to report the correct number of shares of issuer's common stock beneficially owned by the reporting person on such date, which was 36,034. /s/ Tyson Marshall by Power of Attorney 2020-06-18