SEC Form 4 research
| Issuer | Amphastar Pharmaceuticals, Inc. |
|---|---|
| Tickers | AMPH |
| Reporting owners | 19 |
| Officers and directors | 15 |
| Last public filing | 2026-09-23 |
| Available | Trade date | Reporting owners | Code | Shares | Price | Reported value |
|---|---|---|---|---|---|---|
| 2026-09-23 | 2026-09-21 | PETERS WILLIAM J | S | 4,139 | $25 | Not reported |
| 2026-09-17 | 2026-09-16 | Zhou Rong | S | 10,000 | $23.94 | Not reported |
| 2026-09-03 | 2026-09-02 | Zhou Rong | S | 3,187 | $23.63 | Not reported |
| 2026-08-12 | 2026-08-11 | PRINS RICHARD K | S | 7,973 | $20.3 | Not reported |
| 2026-08-11 | 2026-08-07 | PETERS WILLIAM J | S | 8,180 | $22.48 | Not reported |
Public filing evidence only. NexusTrade's simulated follower strategies are hypothetical, modeled results — not live trading returns and not investment advice.