June 3, 2024 · Form 4 insider transaction
ZASLOFF MICHAEL A bought 6,864 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 2 days after the transaction.
All of the shares subject to the option vest on June 3, 2025.