Insider · CIK 0001263136
William J Peters
Files at: AMPH. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 21, 2026 SForm 4 → | Sep 23, 6:02 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 4,139 | $25.00 | $103,475 | 168,707 | −2.39% | 10b5-1 |
| Aug 7, 2026 SForm 4 → | Aug 11, 4:57 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 8,180 | $22.48 | $183,886 | 172,846 | −4.52% | 10b5-1 |
| Aug 7, 2026 MForm 4 → | Aug 11, 4:57 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 5,053 | $19.79 | $99,999 | 181,026 | — | 10b5-1 |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 7, 2026 MForm 4 → | Aug 11, 4:57 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 5,053 | — | — | 0 | — | 10b5-1 |