X0206 3 2019-02-05 0 0001565146 Gulf Coast Ultra Deep Royalty Trust GULTU 0001698990 Magnolia Oil & Gas Corp NINE GREENWAY PLAZA, SUITE 1300 HOUSTON TX 77046 0 0 1 0 0001770618 Highlander Oil & Gas Assets LLC NINE GREENWAY PLAZA, SUITE 1400 HOUSTON TX 77046 0 0 1 0 Royalty Trust Units 31143150 I See Footnote The royalty trust units are owned directly by Highlander Oil & Gas Assets LLC, which is a wholly-owned subsidiary of Highlander Oil & Gas Holdings LLC. MGY Louisiana LLC holds approximately 85% of the units in Highlander Oil & Gas Holdings LLC. MGY Louisiana LLC is a wholly-owned subsidiary of Magnolia Oil & Gas Operating LLC, which is a wholly-owned subsidiary of Magnolia Oil & Gas Intermediate LLC, which is a wholly-owned subsidiary of Magnolia Oil & Gas Parent LLC, whose managing member is Magnolia Oil & Gas Corporation ("Magnolia"). Magnolia disclaims its beneficial ownership of the Royalty Trust Units except to the extent of its pecuniary interest therein. Magnolia Oil & Gas Corporation, /s/ Timothy D. Yang 2019-03-15 Highlander Oil & Gas Assets LLC, /s/ Jordan Benningfield 2019-03-15