David Sponsel serves as Executive at Alphatec Holdings, Inc., where they oversee executive responsibilities. Since joining the company, David Sponsel has executed 47 insider transactions totaling $8.6M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 10, 2025 involved selling 21,106 shares valued at $438.8K.
David Sponsel currently holds 439,767 shares of Alphatec Holdings, Inc. (ATEC), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, David Sponsel has been a net seller of ATEC stock. They have purchased $49.6K and sold $8.5M worth of shares.
David Sponsel's most recent insider trade was on Dec 10, 2025, when they sold 21,106 shares at $20.79 per share.
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| $21.45 |
| Discretionary |
| Oct 24, 2025 | ATEC | $1.1M | Sale | 70,000 | $16.18 | Discretionary |
| Sep 19, 2025 | ATEC | $39.2K | Sale | 2,555 | $15.34 | Discretionary |
| Sep 18, 2025 | ATEC | $2.1M | Sale | 137,445 | $15.09 | Discretionary |
| Aug 6, 2025 | ATEC | $15.1K | Payment | 982 | $15.34 | Discretionary |
| Feb 27, 2024 | ATEC | $491.6K | Sale | 32,365 | $15.19 | Planned |
| Feb 21, 2024 | ATEC | $0 | Award | 35,063 | $N/A | Planned |
| Feb 21, 2024 | ATEC | $273.4K | Sale | 17,820 | $15.34 | Planned |
| Feb 14, 2024 | ATEC | $40.4K | Sale | 2,500 | $16.16 | Planned |
| Feb 2, 2024 | ATEC | $603.1K | Sale | 36,620 | $16.47 | Planned |
| Feb 1, 2024 | ATEC | $0 | Award | 121,258 | $N/A | Planned |
| Jan 16, 2024 | ATEC | $37.5K | Sale | 2,500 | $15.00 | Planned |
| Dec 21, 2023 | ATEC | $37.5K | Sale | 2,500 | $15.00 | Planned |
| Jun 15, 2023 | ATEC | $898.7K | Sale | 55,577 | $16.17 | Planned |
| May 15, 2023 | ATEC | $1.1M | Payment | 68,174 | $15.59 | Discretionary |
| Apr 26, 2023 | ATEC | $574.8K | Payment | 35,590 | $16.15 | Discretionary |
| Mar 6, 2023 | ATEC | $266.1K | Sale | 16,823 | $15.82 | Discretionary |
| Feb 1, 2023 | ATEC | $0 | Award | 30,314 | $N/A | Discretionary |
| Feb 1, 2023 | ATEC | $0 | Award | 98,078 | $N/A | Discretionary |
| Feb 1, 2023 | ATEC | $0 | Award | 60,629 | $N/A | Discretionary |
| Jan 9, 2023 | ATEC | $119.9K | Sale | 10,000 | $11.99 | Discretionary |
| Dec 5, 2022 | ATEC | $98.8K | Sale | 10,000 | $9.88 | Discretionary |
| Nov 7, 2022 | ATEC | $92.5K | Sale | 10,000 | $9.25 | Discretionary |
| Aug 11, 2022 | ATEC | $5.5K | Payment | 620 | $8.91 | Discretionary |
| Jun 3, 2022 | ATEC | $23.1K | Payment | 3,099 | $7.46 | Discretionary |
| May 17, 2022 | ATEC | $281.6K | Payment | 34,087 | $8.26 | Discretionary |
| Apr 28, 2022 | ATEC | $386.8K | Payment | 33,517 | $11.54 | Discretionary |
| Mar 18, 2022 | ATEC | $115.8K | Payment | 10,582 | $10.94 | Discretionary |
| Feb 24, 2022 | ATEC | $0 | Award | 50,000 | $N/A | Discretionary |