Amphastar Pharmaceuticals, INC Form 4 insider transactions

Yakob Liawatidewi, EVP Corp Admin Center at Amphastar Pharmaceuticals, reports acquisition of shares and stock options.

Senior EVP Rong Zhou reports acquisition of stock options and restricted stock units in Amphastar Pharmaceuticals.

William J. Peters, CFO, EVP & Treasurer of Amphastar Pharmaceuticals, reports the acquisition of stock options and restricted stock units.

Floyd F. Petersen, a director at Amphastar Pharmaceuticals, sold a portion of his holdings under a pre-arranged Rule 10b5-1 trading plan.