July 18, 2025 · Form 4 insider transaction
Gaugh David Russell bought 6,304 shares of Amphastar Pharmaceuticals Inc at $0.00 per share, a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 4 days after the transaction.
The reported shares are represented by restricted stock units, or RSUs, all of which vest on July 18, 2026.