X0206 3 2021-03-01 0 0001350653 Alphatec Holdings, Inc. ATEC 0001850165 Pritzker Jennifer N. 104 S. MICHIGAN AVE. CHICAGO IL 60603 0 0 1 0 Common Stock 29200 D Common Stock 11395045 I See footnote Common Stock 2722805 I See footnote Common Stock 10000 I See footnote These shares are held by Squadron Capital LLC ("Squadron"), a manager-managed limited liability company. As one of two members of the Managing Committee of Squadron, the reporting person may be deemed to be the beneficial owner of these shares. The reporting person expressly disclaims beneficial ownership of these shares, except to the extent of her pecuniary interest therein. These shares are held by Tawani Holdings LLC, a manager-managed limited liability company where the reporting person is one of two managers and whose controlling member is a revocable trust (the "Trust") for the benefit of the reporting person, who also serves as trustee of the Trust. In such capacity, the reporting person may be deemed to be the beneficial owner of these shares. The reporting person expressly disclaims beneficial ownership of these shares, except to the extent of her pecuniary interest therein. These shares are held by Mary's Go Round LLC, a manager-managed limited liability company whose manager and sole member is a corporation solely owned by the Trust and where the reporting person is the sole director. In such capacity, the reporting person may be deemed to be the beneficial owner of these shares. The reporting person expressly disclaims beneficial ownership of these shares, except to the extent of her pecuniary interest therein. /s/ Jennifer N. Pritzker 2021-03-10