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Exhibit 21

ENTITY						JURISDICTION
4C's Land Holdings, LLC						Delaware
Arcadia Gas Storage, LLC						Texas
Appalachia Midstream Services, L.L.C.						Oklahoma
Aurora Hydrogen Inc.						Alberta
Bargath LLC						Delaware
Baton Rouge Fractionators LLC						Delaware
Baton Rouge Pipeline LLC						Delaware
Black Marlin Pipeline LLC						Texas
Blue Racer Finance Corp.						Delaware
Blue Racer Midstream, LLC						Delaware
Blue Racer Midstream Holdings, LLC						Delaware
Blue Racer NGL Pipelines, LLC						Delaware
Blue Racer Ohio Compression, LLC						Delaware
Bluestem Gas Services, L.L.C.						Oklahoma
Bluestem Pipeline LLC						Delaware
Branch Midstream Company, LLC						Texas
Brazos Permian II, LLC						Delaware
Cadeville Gas Storage LLC						Delaware
Carbon County UCG, Inc.						Delaware
Carbonate Trend Pipeline LLC						Delaware
Cardinal Gas Services, L.L.C.						Delaware
Cardinal Operating Company, LLC						Delaware
Cardinal Pipeline Company, LLC						North Carolina
Cogentrix Co-Investment Fund, LP						Delaware
Constitution Pipeline Company, LLC						Delaware
Context Labs B.V.						Netherlands
Crowheart Energy, LLC						Delaware
DMP NEW YORK, INC.						New York
Dauphin Island Gathering Partners						Texas
Discovery Gas Transmission LLC						Delaware
Discovery Producer Services LLC						Delaware
Driftwood Pipeline LLC						Delaware
EIC Rose Rock Ventures I, LP						Delaware
EIC Deep Carbonization Frontier Fund I LP						Delaware
EIP Flagship Fund III LP						Delaware
EIP Frontier Fund II LP						Delaware
EIP Frontier I AIV A LP						Delaware
Edge Solar LLC						Delaware
Emerging Energy Ventures, LLC						Delaware
Encino Environmental Holdings LLC						Delaware

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Exhibit 21

ENTITY						JURISDICTION
Energy Impact Fund II (FT-D) LP						Delaware
Energy Impact Fund II LP						Delaware
Fossett Columbine, LLC						Delaware
Gemini Arklatex, LLC						Delaware
Gemini Arklatex Services, LLC						Delaware
Gemini Carthage Pipeline, LLC						Delaware
Gillis New Energy Solutions LLC						Delaware
Gulfstar One LLC						Delaware
Gulfstream Management & Operating Services, L.L.C.						Delaware
Gulfstream Natural Gas System, L.L.C.						Delaware
Hill-Lake Gas Storage, LLC						Texas
ION Clean Energy, Inc.						Delaware
Ingu Solutions Inc.						New Brunswick
Inland Ports, Inc.						Tennessee
Katy Connector Pipeline, LLC						Delaware
Kiowa Lateral LLC						Delaware
Laurel Mountain Midstream Operating LLC						Delaware
Laurel Mountain Midstream, LLC						Delaware
LongPath Technologies, Inc.						Delaware
Louisiana Energy Gateway LLC						Delaware
Louisiana LNG LLC						Delaware
Louisiana Midstream Gas Services, L.L.C.						Oklahoma
Louisiana New Energy Solutions LLC						Delaware
Magnolia Midstream Gas Services, L.L.C.						Oklahoma
Magnolia New Energy Solutions LLC						Delaware
Marsh Resources, LLC						Delaware
Mid-Continent Fractionation and Storage, LLC						Delaware
Mockingbird Midstream Gas Services, L.L.C.						Oklahoma
Monarch Pipeline LLC						Delaware
Monroe Gas Storage Company, LLC						Delaware
MountainWest Energy Holding Company, LLC						Utah
MountainWest Energy Services, LLC						Utah
MountainWest Field Services, LLC						Utah
MountainWest Overthrust Pipeline, LLC						Utah
MountainWest Pipeline Services, LLC						Utah
MountainWest Pipeline, LLC						Utah
MountainWest Pipelines Holding LLC						Delaware
MountainWest Southern Trails Pipeline Company						Utah
MountainWest White River Hub, LLC						Utah
NT Minerals, LLC						Texas

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Exhibit 21

ENTITY						JURISDICTION
NWC Development, LLC						Colorado
New Energy Ventures Holdco, LLC						Delaware
NorTex Development Company, LLC						Delaware
NorTex Midstream Holdings, LLC						Delaware
NorTex Midstream Partners, LLC						Delaware
NorTex Trading and Marketing, LLC						Texas
Northwest Pipeline LLC						Delaware
Ohio Valley Midstream LLC						Delaware
Oklahoma Midstream Gas Services, L.L.C.						Oklahoma
Orbital Sidekick, Inc.						Delaware
Overland Pass Pipeline Company LLC						Delaware
Parachute Pipeline LLC						Delaware
Permian Connector, LLC						Delaware
Perryville Gas Storage LLC						Delaware
Pine Needle LNG Company, LLC						North Carolina
Pine Needle Operating Company, LLC						Delaware
Pine Prairie Energy Center, LLC						Delaware
Ponder Midstream Gas Services, L.L.C.						Delaware
Power Eight Project LLC						Delaware
REP G&P Holdings, LLC						Delaware
REP Processing LLC						Delaware
Rocky Mountain Midstream Holdings LLC						Delaware
Rocky Mountain Midstream JV Holdings LLC						Delaware
Rocky Mountain Midstream LLC						Texas
Rocky Mountain Midstream Marketing LLC						Texas
Rocky Mountain Midstream Pipeline LLC						Texas
SG Resources Mississippi, L.L.C.						Delaware
Saber Midstream Holdings, LLC						Delaware
Saber Midstream, LLC						Delaware
Sequent Energy Canada LLC						Delaware
Sequent Energy Management LLC						Delaware
Sequent LNG LLC						Delaware
Sequent LNG Marketing LLC						Delaware
Sequent Louisiana Gas Supply LLC						Delaware
Socagee Midstream Gas Services LLC						Delaware
South Mansfield E&P, LLC						Delaware
TWC Holdings C.V.						Netherlands
Targa Train 7 LLC						Delaware
Texas Midstream Gas Services, L.L.C.						Oklahoma
The Williams Companies Foundation, Inc.						Oklahoma

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Exhibit 21

ENTITY						JURISDICTION
The Williams Companies International Holdings B.V.						Netherlands
TransCardinal Company, LLC						Delaware
TransCarolina LNG Company, LLC						Delaware
Transco Exploration Company						Delaware
Transcontinental Gas Pipe Line Company, LLC						Delaware
UEOM NGL Pipelines LLC						Delaware
Utica East Ohio Midstream LLC						Delaware
Utica Gas Services, L.L.C.						Oklahoma
WFS - Liquids LLC						Delaware
WFS Dauphin Island, LLC						Delaware
WFS Gathering Company, L.L.C.						Delaware
WFS Mobile Bay Processing, LLC						Delaware
WFS Natural Gas Storage, LLC						Delaware
Wamsutter LLC						Delaware
West Texas Midstream Gas Services, LLC						Delaware
White River Hub, LLC						Delaware
WilPro Energy Services (El Furrial) Limited						Cayman Islands
WilPro Energy Services (Pigap II) Limited						Cayman Islands
Will-Power ID, LLC						Delaware
Will-Power OH, LLC						Delaware
Will-Power OK, LLC						Delaware
Will-Power PENN, LLC						Delaware
Will-Power Pipeline OH, LLC						Delaware
Will-Power Pipeline UT, LLC						Delaware
Will-Power UT, LLC						Delaware
Will-Power VA, LLC						Delaware
Will-Power WY, LLC						Delaware
Williams Acquisition Holding Company LLC						New Jersey
Williams Alaska Petroleum, Inc.						Alaska
Williams Blu Operating LLC						Delaware
Williams CRE LLC						Delaware
Williams CV Holdings LLC						Delaware
Williams Cardinal Gas, LLC						Delaware
Williams Compression LLC						Oklahoma
Williams Driftwood Pipeline LLC						Delaware
Williams Express LLC						Delaware
Williams Express, Inc.						Alaska
Williams Field Services - Gulf Coast Company LLC						Delaware
Williams Field Services Company, LLC						Delaware
Williams Field Services Group, LLC						Delaware

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Exhibit 21

ENTITY						JURISDICTION
Williams Flexible Generation, LLC						Delaware
Williams Front Range LLC						Delaware
Williams Gas Processing - Gulf Coast Company LLC						Delaware
Williams Gilcrest, LLC						Delaware
Williams Global Energy (Cayman) Limited						Cayman Islands
Williams Global Holdings LLC						Delaware
Williams Headquarters Building LLC						Delaware
Williams Holdings and Manufacturing LLC						Delaware
Williams Hutch Rail Company, LLC						Delaware
Williams IP Holdings, LLC						Delaware
Williams Information Technology LLC						Delaware
Williams International Company LLC						Delaware
Williams International El Furrial Limited						Cayman Islands
Williams International Pigap Limited						Cayman Islands
Williams International Venezuela Limited						Cayman Islands
Williams LNG Holdco LLC						Delaware
Williams LNG, LLC						Delaware
Williams Laurel Mountain, LLC						Delaware
Williams Louisiana LNG LLC						Delaware
Williams MLP Operating, LLC						Delaware
Williams Midstream Gas Services LLC						Oklahoma
Williams Mobile Bay Producer Services, L.L.C.						Delaware
Williams Natural Gas Storage, LLC						Delaware
Williams New Energy Solutions LLC						Delaware
Williams Ohio River Valley Corporation						Delaware
Williams Ohio River Valley LLC						Delaware
Williams Ohio Valley Midstream LLC						Texas
Williams Ohio Valley Pipeline LLC						Delaware
Williams Oil Gathering, L.L.C.						Delaware
Williams PERK, LLC						Delaware
Williams Partners Operating LLC						Delaware
Williams Petroleum Services, LLC						Delaware
Williams Pipeline Services LLC						Delaware
Williams Power Innovation, LLC						Delaware
Williams Propylene Company LLC						Delaware
Williams Resource Center, L.L.C.						Delaware
Williams Solar Holdco LLC						Delaware
Williams Strategic Sourcing Company LLC						Delaware
Williams Upstream Holdings, LLC						Delaware

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Exhibit 21

ENTITY						JURISDICTION
Williams WPC - I, LLC						Delaware
Worsham-Steed Gas Storage, LLC						Texas