SEC Filing: Insider Transaction Report for Gerst Diane G. at Amphastar Pharmaceuticals, Inc.

This filing details a Form 4 filed by Gerst Diane G., a director at Amphastar Pharmaceuticals, Inc. The report covers transactions on June 1, 2026. Gerst acquired 8,143 shares of Common Stock, represented by restricted stock units (RSUs) that vest on June 1, 2027. Additionally, Gerst was granted an option to purchase 17,365 shares of Common Stock, with all shares subject to the option vesting on June 1, 2027. The option has an exercise price of $18.42 and an expiration date of June 1, 2036. Following these transactions, Gerst holds 31,899 shares of Common Stock directly and has options for an additional 17,365 shares.