X0508 4 2026-02-05 0001350653 Alphatec Holdings, Inc. ATEC 0001772837 Sponsel David C/O ALPHATEC SPINE, INC. 1950 CAMINO VIDA ROBLE CARLSBAD CA 92008 false true false false EVP, SALES 1 Common Stock 2026-02-05 4 S 0 60425 13.79 D 349500 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 12, 2025 to satisfy certain tax withholding obligations of the reporting person resulting from the vesting of restricted stock units. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.43 to $14.22, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Includes 276 shares and 196 shares acquired under issuer's employee stock purchase plan on May 15, 2025 and November 14, 2025, respectively, and also reflects the forfeiture of 30,314 previously reported restricted stock units for failure to satisfy applicable performance criteria. /s/ Tyson E. Marshall, Attorney-in-Fact 2026-02-06