PETERS WILLIAM J (CIK 1263136) reported 13 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-17). Recent activity: Sell AMPH (1,973 shares), Buy AMPH (58,693 shares), Sell AMPH (3,297 shares), Sell AMPH (2,146 shares), Sell AMPH (1,744 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 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 |
| 2025-03-18 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 1,968 | $52,467 |
| 2025-03-18 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 3,004 | $83,181 |
| 2025-03-12 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Buy | 36,747 | $0 |
| 2025-03-10 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 2,141 | $60,633 |
| 2025-03-06 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Buy | 7,490 | $99,992 |
| 2025-03-06 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 4,231 | $116,522 |
| 2025-03-06 | Amphastar Pharmaceuticals, Inc. (AMPH) | CFO, EVP & TREASURER | Sell | 1,739 | $48,031 |
Source: SEC Form 4 filings · as of 2026-03-17