August 30, 2017

APOLLO NATURAL RESOURCES PARTNERS II AND DOUBLE EAGLE DEVELOPMENT ANNOUNCE FORMATION OF DOUBLE EAGLE ENERGY HOLDINGS III

NEW YORK, NY & FORT WORTH, TX – August 21, 2017 – Affiliates of Apollo Global Management, LLC (NYSE: APO) (together with its consolidated subsidiaries, “Apollo”) and Double Eagle Development, L.L.C. (“Double Eagle”) announced today that they have expanded their strategic relationship to create Double Eagle Energy Holdings III LLC (“Double Eagle III”). Headquartered in Fort Worth, Texas, Double Eagle III will primarily focus on investing in oil and gas

Post Oak Energy Capital Makes $100 Million Equity Commitment to Sierra EF, LP

(Houston) – August 22, 2017 – Post Oak Energy Capital, LP (“Post Oak”), through investment partnerships it manages, today announced that it committed $100 million of equity to Sierra EF, LP (the “Company”), a subsidiary of Sierra Resources, LLC (“Sierra”). Affiliates of GSO Capital Partners LP (“GSO”), and the Sierra management team (“Management”) also have contributed capital to the Company and will continue to invest alongside Post Oak. Sierra is