Live feed21:06:34·55dINSIDERFilingvia QuantisnowSENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,124 shares, decreasing direct ownership by 0.81% to 136,919 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source