Live feed21:58:54·56dINSIDERFilingvia QuantisnowCEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 8,201 shares, decreasing direct ownership by 0.20% to 2,841,890 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source