Live feed16:30:21·1173dINSIDERFilingvia QuantisnowSEC Form 4: Third Rock Ventures Iv, L.P. sold $3,056,000 worth of shares (3,700,000 units at $0.83)ByQuantisnow·Wall Street's wire, on your screen.MGTA· Magenta Therapeutics Inc.Health CareOriginal source