X0508 4 2025-12-08 0001350653 Alphatec Holdings, Inc. ATEC 0001731171 Squadron Capital Holdings LLC 104 S. MICHIGAN AVE. CHICAGO IL 60603 false false true false false Common Stock 2025-12-08 4 S false 221166 21.20 D 10673879 I See footnote Common Stock 2025-12-09 4 S false 28834 21.03 D 10645045 I See footnote The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.42 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. These shares are held of record by Squadron Capital LLC ("Squadron"). Squadron Capital Holdings LLC is the controlling member of Squadron. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.91 to $21.11 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. /s/ Mary Falcon, Manager of Squadron Capital Holdings LLC 2025-12-10