Live feed16:05:04·712dINSIDERFilingvia QuantisnowEVP, Chief Operating Officer Grethlein Andrew J exercised 674,348 shares at a strike of $1.72 and sold $3,073,004 worth of shares (674,348 units at $4.56) (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.GERN· Geron CorporationHealth CareOriginal source