X0609 4 2026-09-01 0001698990 Magnolia Oil & Gas Corp MGY 0001629039 Acosta Arcilia false C/O MAGNOLIA OIL & GAS CORPORATION NINE GREENWAY PLAZA, SUITE 1300 HOUSTON TX 77046 true false false false 0 Class A Common Stock 2026-09-01 4 A 0 80 0 A 134721 D Reflects additional fully-vested restricted stock units ("RSUs") issued under the Magnolia Oil & Gas Corporation Long Term Incentive Plan with respect to dividend equivalent rights on previously deferred RSUs held by the reporting person, in connection with the payment of cash dividends to holders of Class A common stock ("Class A Common Stock") of Magnolia Oil & Gas Corporation on September 1, 2026. Each RSU represents a contingent right to receive one share of Class A Common Stock. /s/ Timothy D. Yang, Attorney-in-Fact 2026-09-03