Live feed16:04:32·417dINSIDERFilingvia QuantisnowCEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 12,714 shares, decreasing direct ownership by 0.39% to 2,493,156 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source