X0306 4 2018-06-11 0 0001486159 Oasis Petroleum Inc. OAS 0001494075 Nusz Thomas B 1001 FANNIN ST, STE 1500 HOUSTON TX 77002 1 1 0 0 Chairman and CEO Common Stock 2018-06-11 4 J 0 88086 0.00 A 88086 I By Amalaya Investments, LLC Common Stock 1646817 D On June 11, 2018, an entity in which Amalaya Investments, LLC ("Amalaya") owns member interests made a distribution to its members, pro rata without consideration, of shares of Issuer common stock held by such entity. Pursuant to the distribution, Amalaya received 88,086 shares of Issuer common stock. The Reporting Person is the Managing Member of Amalaya, which is controlled by the Reporting Person and his wife. /s/ Nickolas J. Lorentzatos, as attorney-in-fact 2018-06-13