Demski David M
SEC CIK 1555392 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| ATEC | Alphatec Holdings, Inc. | Dir | 431.6K | $860.9K | $636.0K | 9 | 2023-10-17 | 2026-06-10 |
Most active insiders at ATEC, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Pelizzon David R | Dir, 10% | — | $20.57M |
| 2 | Pritzker Jennifer N. | 10% | — | $15.65M |
| 3 | Squadron Capital Holdings LLC | 10% | — | $15.65M |
| 4 | Squadron Capital LLC | 10% | — | $15.65M |
| 5 | Miles Patrick | CEO, Dir | $1.01M | $7.60M |
| 6 | Hunsaker Craig E | EVP, PEOPLE, CULTURE | — | $4.66M |
| 7 | Sponsel David | EVP, SALES | — | $4.47M |
| 8 | Lish Scott | COO | — | $4.32M |
| 9 | Rydin Jeffrey P | Dir | — | $3.86M |
| 10 | Marshall Tyson Eliot | GC, CORP. SEC | — | $3.05M |
| 13 | Demski David M | Dir | — | $636.0K |
Transactions 9
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-06-12 17:30 | 2026-06-10 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | A - Grant | $0.00 | +32.0K | 431.6K | +8% | $0 | |
| 2025-12-12 | 2025-12-11 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | S - Sale | $21.20 | -30.0K | 399.6K | -7% | -$636.0K | |
| 2025-06-13 | 2025-06-11 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | A - Grant | $0.00 | +15.1K | 429.6K | +4% | $0 | |
| 2024-12-18 | 2024-12-18 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | A - Grant | — | +126.1K | 414.5K | +44% | — | |
| 2024-08-21 | 2024-08-21 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | P - Purchase | $5.67 | +50.0K | 288.4K | +21% | +$283.5K | |
| 2024-08-05 | 2024-08-02 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | P - Purchase | $6.56 | +40.0K | 238.4K | +20% | +$262.4K | |
| 2024-06-14 | 2024-06-12 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | A - Grant | $0.00 | +16.7K | 198.4K | +9% | $0 | |
| 2023-11-13 | 2023-11-09 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | P - Purchase | $10.50 | +30.0K | 181.7K | +20% | +$315.0K | |
| M | 2023-10-19 | 2023-10-17 | ATEC | Alphatec Holdings, Inc. | Demski David M | Dir | A - Grant | $0.00 | +31.7K | 151.7K | +26% | $0 |
Purchase Sale Sale after option exercise All abbreviations