Live feed16:16:33·166dINSIDERFilingvia QuantisnowDirector Petersen Floyd F. sold $441,837 worth of shares (16,679 units at $26.49) and exercised 16,679 shares at a strike of $16.69 (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source