Richard K. Prins, Director at Amphastar Pharmaceuticals, Inc. (AMPH), sold 5,000 shares at $21.22 ($106K) on 2021-11-22, disclosed to the SEC on 2021-11-23.
Open-market sale of $106k AMPH 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 → |
| AMPH | SELL | 2024-12-11 | $875K | — | Filing → |
| AMPH | SELL | 2024-11-13 | $244K | — | Filing → |
| AMPH | SELL | 2024-08-13 | $1.5M | — | Filing → |