Gaugh David Russell (CIK 2075974) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-03). Recent activity: Buy AMPH (8,143 shares), Buy AMPH (6,304 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-03 | Amphastar Pharmaceuticals, Inc. (AMPH) | Director | Buy | 8,143 | $0 |
| 2025-07-22 | Amphastar Pharmaceuticals, Inc. (AMPH) | Director | Buy | 6,304 | $0 |
Source: SEC Form 4 filings · as of 2026-06-03