March 9, 2026 · Form 4 insider transaction
Zhang Jack Y. bought 72,462 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.
The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on March 9, 2027.; The securities are held of record by Mary Z. Luo. The reporting persons are husband and wife.