Live feed21:54:41·1258dINSIDERFilingvia QuantisnowSEC Form 4: Mcdonald Kevin M converted options into 50,747 shares and covered exercise/tax liability with 18,955 shares, increasing direct ownership by 11% to 317,050 unitsByQuantisnow·Wall Street's wire, on your screen.NEX· NexTier Oilfield Solutions Inc.EnergyOriginal source