Live feed18:12:22·45dINSIDERFilingvia QuantisnowCEO & CHIEF SCIENTIFIC OFFICER Zhang Jack Y. covered exercise/tax liability with 12,692 shares, decreasing direct ownership by 0.33% to 2,990,052 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source