• 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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