Natural Gas Transmission Companies – page 2

• Targa Energy LP
• Elk City Oklahoma GP, LLC
• Enbridge G & P (Oklahoma) L.P.
• Atlas Pipeline Finance CORP
• Atlas Arkansas Pipeline LLC
• Copano Energy Finance CORP
• Noark Pipeline System, L.P.
• Ozark Gas Transmission, LLC
• Mid-Continent Arkansas Pipeline, LLC
• Ozark Gas Gathering, LLC
• NOARK Energy Services, LLC
• Archrock Partners, L.P.
• Duncan Energy Partners L.P.
• Targa Resources Partners LP
• Crestwood Midstream Partners LP
• Archrock Inc.
• TRI Resources Inc.
• Targa Resources Corp.
• Spectra Energy Partners, LP
• DCP Midstream Operating, LP
• OGE Enogex Partners L.P.
• Atlas Midkiff, LLC
• Atlas Chaney Dell, LLC
• Cdm Resource Partners L P
• El Paso Pipeline Partners, L.P.
• Williams Pipeline Partners L.P.
• Western Midstream Operating, LP
• Southern Natural Issuing CORP
• Columbia Pipeline Partners LP
• Western Midstream Partners LP Representing Limited Partner Interests
• Texas Midstream Gas Services LLC
• DEP Operating Partnership, L.P.
• Access Midstream Gas Services LLC
• Oklahoma Midstream Gas Services LLC
• Targa Resources Partners Finance CORP
• Atlas Pipeline Tennessee, LLC
• Atlas Pipeline McKean, LLC
• Velma Intrastate Gas Transmission Company, LLC
• Enbridge Pipelines (Oklahoma Transmission) L.L.C.
• Wyoming Interstate Company, L.L.C.
• El Paso Pipeline Partners Operating Company, L.L.C.
• COLORADO INTERSTATE ISSUING Corp
• WGR Operating LP
• Anadarko Gathering Co LLC
• Western Gas Operating, LLC
• Western Gas Partners Finance Corp
• Williams Pipeline Operating LLC
• Williams Pipeline Partners Holdings LLC
• Paa Natural Gas Storage LP
• Williams Partners L.P.
• Niska GS Holdings I, L.P.
• Niska Gas Storage Partners LLC
• NGL ENERGY PARTNERS LP
• Slider WestOK Gathering, LLC
• APL Laurel Mountain, LLC
• Kinder Morgan Inc.
• Niska Gas Storage US Finance Corp.
• Niska Gas Storage Canada ULC
• Niska Gas Storage Canada L.P.
• Niska US GP LLC
• Niska Holdco ULC
• Niska Partners Management ULC
• Niska Gas Storage, LLC
• Enerstream Agency Services Inc.
• Niska Gas Storage US, LLC
• Niska Partners Cooperatief U.A.
• AECO Gas Storage Partnership
• Access Gas Services (Alberta) Inc.
• Access Gas Services Inc.
• Access Gas Services (Ontario) Inc.
• Wild Goose Storage, LLC
• Niska Gas Transport Inc.
• Niska GS Holdings II, LP
• Salt Plains Storage LLC
• Niska Gas Storage Canada Finance Corp.
• Niska GP Alberta ULC
• Niska Gas Storage Operations LLC
• Niska GP ULC
• Third Coast Midstream, LLC
• Magnolia Midstream Gas Services LLC
• Acmp Finance Corp
• Ponder Midstream Gas Services LLC
• Access Mlp Operating LLC
• PNG Finance Corp.
• USA Compression Partners LP Representing Limited Partner Interests
• Atlas Pipeline NGL Holdings II, LLC
• Atlas Pipeline NGL Holdings, LLC
• Velma Gas Processing Company, LLC
• EQM Midstream Partners, LP
• Appalachia Midstream Services LLC
• Southcross Energy Partners LLC
• Summit Midstream Partners LP
• Gulf South Pipeline Company, LP
• Tallgrass Energy Partners, LP
• Azure Midstream Partners, LP
• Andeavor Midstream Partners LP
• QEP Field Services Co
• Summit Midstream Holdings, LLC
• Devon Midstream Partners, L.P.
• Enable Midstream Partners LP

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