Live feed18:10:15·417dINSIDERFilingvia QuantisnowSENIOR EVP, PRODUCTION CENTER Zhou Rong covered exercise/tax liability with 1,354 shares, decreasing direct ownership by 1% to 115,994 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source