Insider · CIK 0001645326
Rong Zhou
Files at: AMPH. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 16, 2026 SForm 4 → | Sep 17, 6:19 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,000 | $23.94 | $239,404 | 169,203 | −5.58% | |
| Sep 16, 2026 MForm 4 → | Sep 17, 6:19 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,000 | $13.35 | $133,500 | 179,203 | — | |
| Sep 2, 2026 SForm 4 → | Sep 3, 7:42 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 3,187 | $23.63 | $75,306 | 169,203 | −1.85% |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 16, 2026 MForm 4 → | Sep 17, 6:19 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,000 | — | — | 19,424 | — |