Live feed18:14:55·7mINSIDERFilingvia QuantisnowDirector Prins Richard K sold $161,852 worth of shares (7,973 units at $20.30), decreasing direct ownership by 21% to 29,625 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source