PETERS WILLIAM J (CIK 1263136) reported 9 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-23). Recent activity: Sell AMPH (4,139 shares), Buy AMPH (5,053 shares), Sell AMPH (8,180 shares), Sell AMPH (1,973 shares), Buy AMPH (58,693 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-23 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 4,139 | $103,475 |
| 2026-08-11 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Buy | 5,053 | $99,999 |
| 2026-08-11 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 8,180 | $183,886 |
| 2026-03-17 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 1,973 | $35,869 |
| 2026-03-11 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Buy | 58,693 | $0 |
| 2026-03-11 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 3,297 | $62,346 |
| 2026-03-10 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 2,146 | $41,504 |
| 2026-03-06 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 1,744 | $34,810 |
| 2025-05-20 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 273 | $6,768 |
来源：SEC Form 4 申报文件 · 截至 2026-09-23