Live feed16:31:57·1563dINSIDERFilingvia QuantisnowSEC Form 4: Layton Mark E. sold $82,325 worth of shares (40,417 units at $2.04), decreasing direct ownership by 8% to 455,360 units (withholding tax)ByQuantisnow·Wall Street's wire, on your screen.TUSK· Mammoth Energy Services Inc.EnergyOriginal source