December 17, 2025 · Form 4 insider transaction
Zhou Rong bought 9,787 shares of Amphastar Pharmaceuticals Inc at $11.33 per share, a transaction worth $110.9K. The trade was recorded as option exercise and disclosed on an SEC Form 4, filed 1 day after the transaction.
Includes 545 shares acquired on May 31, 2025 and one share acquired on November 30, 2025 under the Issuer's 2014 Employee Stock Purchase Plan.