Live feed21:06:37·932dINSIDERFilingvia QuantisnowPeterson Kristine exercised 20,000 shares at a strike of $11.59 and sold $578,000 worth of shares (20,000 units at $28.90) (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.IMGN· ImmunoGen Inc.Health CareOriginal source