🕵️ Alphatec Holdings, Inc. ($ATEC)
SEC insider & ownership activity, last 12 months · CIK 1350653 · every row links its SEC filing
Over the last 12 months insiders sold $107.5M against $996K of open-market buying. David R. Pelizzon sold $20.6M (Nov–Dec). No red-flag 8-Ks in the window.
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planned-vs-executed verdicts, pre-event flags, and cluster context live in the
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $996K (3 lots) · 14 sellers, $107.5M (57 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| David R. Pelizzon | 0 | – | 5 | $20.6M | Dec 16, 2025 |
| Squadron Capital LLC | 0 | – | 4 | $15.7M | Dec 9, 2025 |
| Squadron Capital Holdings LLC | 0 | – | 4 | $15.7M | Dec 9, 2025 |
| Jennifer N. Pritzker | 0 | – | 4 | $15.7M | Dec 9, 2025 |
| Patrick Miles | 0 | – | 5 | $12.3M | Jan 5, 2026 |
| David Sponsel | 0 | – | 7 | $6.6M | Mar 11, 2026 |
| Craig Hunsaker | 0 | – | 7 | $5.6M | Mar 9, 2026 |
| Scott Lish | 0 | – | 9 | $5.5M | Mar 13, 2026 |
| Jeffrey P. Rydin | 0 | – | 1 | $3.9M | Nov 3, 2025 |
| Tyson Marshall | 0 | – | 7 | $3.4M | Mar 5, 2026 |
| Berkowitz Mortimer III | 0 | – | 1 | $998K | Sep 9, 2025 |
| Valentine Keith | 3 | $996K | 0 | – | May 11, 2026 |
| John Todd Koning | 0 | – | 1 | $986K | Mar 13, 2026 |
| David M. Demski | 0 | – | 1 | $636K | Dec 11, 2025 |
| Karen K. McGinnis | 0 | – | 1 | $48K | Jun 11, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Jennifer N. Pritzker | 8.9% | 13D | Dec 15, 2025 | filing ↗ | |
| David R. Pelizzon | 7.2% | 13D | Dec 15, 2025 | filing ↗ | |
| Squadron Capital LLC | 7.0% | 13D | Dec 15, 2025 | filing ↗ | |
| Squadron Capital Holdings LLC | 7.0% | 13D | Dec 15, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Karen K. McGinnis | $48K | Jun 11, 2026 | filing ↗ |
| John Todd Koning | $997K | Mar 13, 2026 | filing ↗ |
| Scott Lish | $3.2M | Mar 13, 2026 | filing ↗ |
| David Sponsel | $2.0M | Mar 11, 2026 | filing ↗ |
| Craig Hunsaker | $1.2M | Mar 6, 2026 | filing ↗ |
| Tyson Marshall | $1.2M | Mar 5, 2026 | filing ↗ |
| David Sponsel | $850K | Feb 5, 2026 | filing ↗ |
| Craig Hunsaker | $548K | Feb 3, 2026 | filing ↗ |
| Patrick Miles | $6.2M | Jan 5, 2026 | filing ↗ |
| Scott Lish | $392K | Dec 16, 2025 | filing ↗ |
| David M. Demski | $630K | Dec 11, 2025 | filing ↗ |
| David Sponsel | $436K | Dec 10, 2025 | filing ↗ |
| Tyson Marshall | $276K | Dec 5, 2025 | filing ↗ |
| Tyson Marshall | $213K | Dec 5, 2025 | filing ↗ |
| Scott Lish | $234K | Dec 5, 2025 | filing ↗ |
| Craig Hunsaker | $6.5M | Dec 5, 2025 | filing ↗ |
| Tyson Marshall | $1.4M | Nov 20, 2025 | filing ↗ |
| Scott Lish | $495K | Nov 20, 2025 | filing ↗ |
| Jeffrey P. Rydin | $3.9M | Nov 3, 2025 | filing ↗ |
| Craig Hunsaker | $2.0M | Oct 31, 2025 | filing ↗ |
| David Sponsel | $1.1M | Oct 24, 2025 | filing ↗ |
| Patrick Miles | $4.4M | Oct 1, 2025 | filing ↗ |
| David Sponsel | $39K | Sep 19, 2025 | filing ↗ |
| David Sponsel | $2.0M | Sep 18, 2025 | filing ↗ |
| Patrick Miles | $4.8M | Sep 2, 2025 | filing ↗ |
| Scott Lish | $246K | Aug 13, 2025 | filing ↗ |
| Tyson Marshall | $270K | Aug 5, 2025 | filing ↗ |
| Scott Lish | $248K | Aug 5, 2025 | filing ↗ |
| Scott Lish | $246K | Aug 4, 2025 | filing ↗ |
| Scott Lish | $203K | Aug 1, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jun 10, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 10, 2026 | filing ↗ |
| Material agreement (1.01) | May 1, 2026 | filing ↗ |
| Agreement terminated (1.02) | May 1, 2026 | filing ↗ |
| Earnings (2.02) | May 1, 2026 | filing ↗ |
| New financial obligation (2.03) | May 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 1, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 25, 2026 | filing ↗ |
| Other events (8.01) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Earnings (2.02) | Feb 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 24, 2026 | filing ↗ |
| Earnings (2.02) | Jan 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 12, 2026 | filing ↗ |
| Other events (8.01) | Nov 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 3, 2025 | filing ↗ |
| Earnings (2.02) | Oct 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 30, 2025 | filing ↗ |
| Earnings (2.02) | Jul 31, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 31, 2025 | filing ↗ |