David M. Demski, Director at Alphatec Holdings, Inc. (ATEC), sold 30,000 shares at $21.20 ($636K) on 2025-12-11, disclosed to the SEC on 2025-12-12.
Open-market sale of $636k ATEC by Director. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| Filing → |
| ATEC | BUY | 2023-11-13 | $315K | — | Filing → |
| GMED | SELL | 2021-04-27 | $38.0M | — | Filing → |
| GMED | SELL | 2020-12-18 | $27.9M | — | Filing → |