Richard K. Prins, Director at Amphastar Pharmaceuticals, Inc. (AMPH), sold 31,654 shares at $18.90 ($598K) on 2021-05-11, disclosed to the SEC on 2021-05-13.
Seasonal sale ($598k) by Director — this insider has traded AMPH in May in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $18.90 | 15,827 | $299K | 50.0% |
| 2 | $18.90 | 15,827 | $299K | 50.0% |
| Total | $18.90 avg | 31,654 | $598K | 100% |
| Filing → |
| AMPH | SELL | 2024-12-11 | $875K | — | Filing → |
| AMPH | SELL | 2024-11-13 | $244K | — | Filing → |
| AMPH | SELL | 2024-08-13 | $1.5M | — | Filing → |