Live feed19:42:31·1254dINSIDERFilingvia QuantisnowSEC Form 4: Mcdonald Kevin M converted options into 77,206 shares and covered exercise/tax liability with 28,837 shares, increasing direct ownership by 15% to 365,419 unitsByQuantisnow·Wall Street's wire, on your screen.NEX· NexTier Oilfield Solutions Inc.EnergyOriginal source