| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Squadron Capital Holdings LLC | 10%+ Owner | 104 S. MICHIGAN AVE., CHICAGO | /s/ Mary Falcon, Manager of Squadron Capital Holdings LLC | 10 Dec 2025 | 0001731171 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATEC | Common Stock | Sale | $4,688,719 | -221,166 | -2% | $21.20 | 10,673,879 | 08 Dec 2025 | See footnote | F1, F2 |
| transaction | ATEC | Common Stock | Sale | $606,379 | -28,834 | -0.27% | $21.03 | 10,645,045 | 09 Dec 2025 | See footnote | F2, F3 |
| Id | Content |
|---|---|
| F1 | 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. |
| F2 | These shares are held of record by Squadron Capital LLC ("Squadron"). Squadron Capital Holdings LLC is the controlling member of Squadron. |
| F3 | 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. |