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| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For ATEC | |||||
| 2026-06-11 | Mcginnis, Karen K | Director | Sold | 6050 | $8.01 |
| 2026-06-10 | Mcginnis, Karen K | Director | Purchased | 32012 | $0.00 |
| 2026-06-10 | Pelizzon, David R | Director | Purchased | 32012 | $0.00 |
| 2026-06-10 | Demski, David M | Director | Purchased | 32012 | $0.00 |
| 2026-06-10 | Berkowitz, Mortimer Iii | Director | Purchased | 32012 | $0.00 |
| 2026-06-10 | Valentine, Keith | Director | Purchased | 32012 | $0.00 |
| 2026-06-10 | Blackford, Quentin S. | Director | Purchased | 32012 | $0.00 |
| 2026-05-11 | Valentine, Keith | Director | Purchased | 35000 | $7.00 |
| 2026-05-08 | Valentine, Keith | Director | Purchased | 43847 | $7.54 |
| 2026-05-07 | Valentine, Keith | Director | Purchased | 56153 | $7.49 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Purchased | 15000 | $1.68 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Purchased | 15000 | $1.98 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Sold | 15000 | $0.00 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Purchased | 60000 | $2.69 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Purchased | 12500 | $3.34 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Sold | 60000 | $0.00 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Sold | 12500 | $0.00 |
| 2026-04-07 | Marshall, Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Sold | 23393 | $11.03 |
| 2026-03-13 | Koning, John Todd | CHIEF FINANCIAL OFFICER | Sold | 79789 | $12.36 |
| 2026-03-13 | Lish, Scott | CHIEF OPERATING OFFICER | Sold | 260535 | $12.30 |
