• Petron Energy II, Inc.
• Advantage Oil & Gas Ltd.
• VNR Holdings, LLC
• Vanguard Natural Gas, LLC
• Trust Energy Company, LLC
• Vanguard Permian, LLC
• Ariana Energy, LLC
• Cimarex Resolute LLC
• HK Transportation, LLC
• PSE Finance Corp
• Pioneer Southwest Energy Partners USA LLC
• Cobalt International Energy, Inc.
• Banner Pipeline Company, L.L.C.
• Pvr Finco LLC
• PVR MIDSTREAM JV Holdings LLC
• Dulcet Acquisition LLC
• Toney Fork LLC
• Connect Gas Pipeline LLC
• Regency Pipeline LLC
• PVR Gas Processing LLC
• Pvr Gas Processing, LLC
• Regency Hydrocarbons LLC
• Regency Laverne LLC
• Pvr Gas Gathering, LLC
• PostRock Energy Corp
• Resaca Exploitation, Inc.
• Energy XXI USA, Inc.
• Comstock Oil & Gas Investments, LLC
• Comstock Oil & Gas, LLC
• Comstock Oil & Gas GP, LLC
• Cenovus Energy Inc
• Sable Natural Resources Corp
• Antero Resources LLC
• Kolibri Global Energy Inc.
• Catco Energy LLC
• Auxillium Energy Inc.
• Offshore Petroleum Corp.
• Abby Inc.
• New Western Energy Corp
• Atlas Resources Public #19-2010 Program
• Jones Energy Holdings, LLC
• Approach Resources I, LP
• Approach Oil & Gas Inc.
• Approach Operating, LLC
• Approach Delaware, LLC
• Approach Services, LLC
• Citadel Exploration, Inc.
• Stratex Oil & Gas Holdings, Inc.
• Bellatrix Exploration Ltd.
• Red Mountain Resources, Inc.

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