Live feed17:22:13·1887dINSIDERFilingvia QuantisnowSEC Form 4: Cal Henderson sold $44,166 worth of Class A Common Stock (1,072 units at $41.20), decreasing direct ownership by 3% to 39,737 unitsByQuantisnow·Wall Street's wire, on your screen.WORK· Slack Technologies, Inc.Consumer ServicesOriginal source