Live feed18:14:22·42dINSIDERFilingvia QuantisnowCFO, EVP & TREASURER Peters William J covered exercise/tax liability with 1,973 shares, decreasing direct ownership by 1% to 175,063 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source