Richard K. Prins, Director at Amphastar Pharmaceuticals, Inc. (AMPH), sold 10,000 shares at $20.78 ($208K) on 2019-08-13, disclosed to the SEC on 2019-08-15.
Seasonal sale ($208k) by Director — this insider has traded AMPH in August in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| Filing → |
| AMPH | SELL | 2024-12-11 | $875K | — | Filing → |
| AMPH | SELL | 2024-11-13 | $244K | — | Filing → |
| AMPH | SELL | 2024-08-13 | $1.5M | — | Filing → |