EX-21 18 d93687ex21.txt SUBSIDIARIES OF THE REGISTRANT EXHIBIT 21 SUBSIDIARY LIST 898389 Alberta Ltd. Alberta ACCROSERV SRL Barbados ACCROVEN SRL Barbados AIF Telecom Fund Cayman Islands Alaska Blimpie Co-Op, Inc. Delaware American Soda, L.L.P. Colorado Apco Argentina, Inc. Cayman Islands Apco Delaware, Inc. Delaware Apco Properties Ltd. Cayman Islands Arctic Fox Assets, L.L.C. Delaware Aspen Products Pipeline LLC Delaware Aurex LPG Sp. z.o.o Poland Bargath Inc. Colorado Barrett Fuels Corporation Delaware Barrett Resources (Peru) Corporation Delaware Barrett Resources International Corporation Delaware Baton Rouge Fractionators LLC Delaware Beaver Dam Wash Energy, LLC Delaware Beech Grove Processing Company Tennessee Bison Royalty LLC Delaware Black Marlin Pipeline Company Texas Buccaneer Gas Pipeline Company, L.L.C. Delaware Cannon Pipeline L.L.C. Oklahoma Capstone Turbine Corporation Carbon County UCG, Inc. Delaware Cardinal Extension Company, LLC North Carolina Cardinal Operating Company Delaware Castle Associates, L.P. Delaware Chacahoula Natural Gas Storage, LLC Delaware ChoiceSeat, L.L.C. Delaware Cove Point LNG Limited Partnership Delaware Cross Bay Operating Company Delaware Cross Bay Pipeline Company, L.L.C. Delaware Cumberland Gas Pipeline Company Cumberland Operating Company Delaware
Discovery Gas Transmission LLC Delaware Discovery Producer Services LLC Delaware Distributed Power Solutions L.L.C. Delaware Dogwood Ventures Company, LLC Delaware Eagle Gas Services, Inc. Ohio Energy International Corporation Pennsylvania Energy News Live, LLC Delaware Energy Tech, Inc. Delaware Erie & Hudson Development Company Ohio ESPAGAS USA, Inc. Delaware ESPAGAS, S.A. de C.V. Mexico F T & T, Inc. Delaware Fishhawk Ranch, Inc. Florida FleetOne Inc. Delaware FPT Marketing Company Limited Bermuda Free Port Terminal Company Limited Bermuda Fulton Energy Center, LLC Delaware Garrison, L.L.C. Delaware Gas Supply, L.L.C. Delaware Georgia Strait Crossing Pipeline LP Utah Goebel Gathering Company, L.L.C. Delaware GSX Operating Company, LLC Delaware GSX Pipeline, LLC Delaware GSX Western Pipeline Company Delaware Gulf Liquids Holdings LLC Delaware Gulf Liquids New River Project LLC Delaware Gulf Stream Natural Gas System, L.L.C. Delaware Gulfstream Management & Operating Services, L.L.C. Delaware Halgas, Inc. Oklahoma Hazleton Fuel Management Company Delaware Hazleton Pipeline Company Delaware HI-BOL Pipeline Company Delaware Independence Operating Company Delaware Inland Ports, Inc. Tennessee Juarez Pipeline Company Delaware Kern River Acquisition, LLC Delaware Kern River Funding Corporation Delaware Kern River Gas Transmission Company Texas Kiowa Gas Storage, L.L.C. Delaware
Langside Limited Bermuda Laughton, L.L.C. Delaware Liberty Operating Company Delaware Lightel S. A. Tecnologia da Informacao Littlefield Energy, LLC Delaware Longhorn Enterprises of Texas, Inc. Delaware Longhorn Partners GP, L.L.C. Delaware Longhorn Partners Pipeline, L.P. Delaware Magnolia Methane Corp. Delaware MAPCO Alaska Inc. Alaska MAPCO Canada Energy Inc. Canada MAPCO Energy Services, L.L.C. Delaware MAPCO Impressions Inc. Oklahoma MAPCO Inc. (DE) Delaware MAPCO Indonesia Inc. Delaware MAPL Investments, Inc. Delaware Marsh Resources, Inc. Delaware MCNIC Black Marlin Offshore Company Michigan Memphis Generation, L.L.C. Delaware MESBIC Ventures Holding Company Mid-America Pipeline Company Delaware Millennium Energy Fund, L.L.C. Delaware Moriche Bank Ltd. Barbados Nebraska Energy, L.L.C. Kansas NESP Supply Corp. Delaware North Padre Island Spindown, Inc. Delaware Northern Border Intermediate Limited Partnership Delaware Northern Border Partners, L.P. Northwest Alaskan Pipeline Company Delaware Northwest Argentina Corporation Utah Northwest Border Pipeline Company Delaware Northwest Land Company Delaware Northwest Pipeline Corporation Delaware NWP Enterprises, Inc. Delaware NWP Enterprises, LLC Delaware P.T. MAPCO Coal Indonesia Pan-Alberta Resources Inc. Canada Parkco, L.L.C. Oklahoma Piceance Production Holdings LLC Delaware Pine Needle LNG Company, LLC North Carolina
Pine Needle Operating Company Delaware Piper Power Company, LLC Delaware Plains Petroleum Gathering Company Delaware Rainbow Resources, Inc. Colorado Realco of Crown Center, Inc. Delaware Realco of San Antonio, Inc. Delaware Realco Realty Corp. Delaware Reserveco Inc. Delaware Rio Grande Pipeline Company Texas Rio Vista Energy Marketing Company, L.L.C. Delaware Rulison Production Company LLC Delaware Seminole Pipeline Company Delaware Servicios de ESPAGAS. S.A. de C.V. Mexico Servicios de TouchStar de Mexico S.A. de C.V. Mexico Snow Goose Associates, L.L.C. Delaware Sociedad Williams Enbridge y Compania Venezuela Solutions EMT, Inc. SPV, L.L.C. Oklahoma Tennessee Processing Company Delaware Terrebonne Pipeline Company Delaware Texas Gas Transmission Corporation Delaware TGPL Enterprises, Inc. Delaware TGPL Enterprises, LLC Delaware TGT Enterprises, Inc. Delaware TGT Enterprises, LLC Delaware The Asian Infrastructure Fund Cayman Islands The Tennessee Coal Company Delaware The Williams Companies Foundation, Inc. Oklahoma Thermogas Energy, LLC Delaware TM Cogeneration Company Delaware TouchStar de Mexico S.A. de C.V. Mexico Touchstar Energy Technologies, Inc. Texas TouchStar Technologies, L.L.C. Delaware TouchSystems (Pty) Ltd. South Africa TransCardinal Company Delaware TransCarolina LNG Company Delaware Transco Coal Gas Company Delaware Transco Cross Bay Company Delaware Transco Energy Company Delaware Transco Energy Investment Company Delaware Transco Energy Marketing Company Delaware
Transco Exploration Company Delaware Transco Gas Company Delaware Transco Independence Pipeline Company Delaware Transco Liberty Pipeline Company Delaware Transco P-S Company Delaware Transco Resources, Inc. Delaware Transco Terminal Company Delaware Transco Tower Realty, Inc. Delaware Transcontinental Gas Pipe Line Corporation Delaware TransCumberland Pipeline Company Delaware Transeastern Gas Pipeline Company, Inc. Delaware TransNetwork Holding Company Delaware Transportadora de Gas Zapata, S. de R.L. de C.V. Mexico Tri-States NGL Pipeline, L.L.C. Delaware Tulsa Williams Company Delaware TXG Gas Marketing Company Delaware Valley View Coal, Inc. Tennessee Volunteer - Williams, L.L.C. Delaware WBI Offshore Pipeline, Inc. Delaware Webb/Duval Gatherers WEM&T Trading GmbH Austria West Texas LPG Pipeline Limited Partnership Texas Western Frontier Pipeline Company, L.L.C. Delaware WFS - Liquids Company Delaware WFS - NGL Pipeline Company, Inc. Delaware WFS - OCS Gathering Co. Delaware WFS - Offshore Gathering Company Delaware WFS - Pipeline Company Delaware WFS Enterprises, Inc. Delaware WFS Gathering Company, L.L.C. Delaware WGP Enterprises, Inc. Delaware WGP Gulfstream Pipeline Company, L.L.C. Delaware WGP International Canada, Inc. New Brunswick WHBC Holdings, LLC Delaware WHBC, LLC Delaware WHD Enterprises, Inc. Delaware WHD Enterprises, LLC Delaware WilJet, L.L.C. Arizona
WillBros Terminal Company Delaware Williams Acquisition (DE) LLC Delaware Williams Acquisition Holding Company, Inc. (Del) Delaware Williams Acquisition Holding Company, Inc. (NJ) New Jersey Williams Aircraft Leasing, LLC Delaware Williams Aircraft, Inc. Delaware Williams Alaska Air Cargo Properties, L.L.C. Alaska Williams Alaska Petroleum, Inc. Alaska Williams Alaska Pipeline Company, L.L.C. Delaware Williams Alliance Canada Marketing, Inc. New Brunswick Williams Ammonia Pipeline, L.P. Delaware Williams Bio-Energy, LLC Delaware Williams Cove Point LNG Company, L.L.C. Delaware Williams Cove Point, Inc. Delaware Williams Customer Information Solution, Inc. Delaware Williams Distributed Power Services, Inc. Delaware Williams EnergIa Espana, S.L. Spain Williams Energia Italia SRL Italy Williams Energias Espana SL Spain Williams Energy (Canada), Inc. New Brunswick Williams Energy (Canada) Pipeline, Inc. New Brunswick Williams Energy Company Delaware Williams Energy European Services Ltd. United Kingdom Williams Energy Management, Inc. Delaware Williams Energy Marketing & Trading Canada, Inc. New Brunswick Williams Energy Marketing & Trading Company Delaware Williams Energy Marketing & Trading Europe Ltd England Williams Energy Marketing & Trading Holdings UK Ltd. United Kingdom Williams Energy Network, Inc. Delaware Williams Energy Partners L.P. Delaware Williams Energy Services, LLC Delaware Williams Energy, L.L.C. Delaware Williams Environmental Services Company Delaware Williams Equities, Inc. Delaware Williams Ethanol Services, Inc. Delaware Williams Exploration Company Delaware Williams Express, Inc. (AK) Alaska Williams Express, Inc. (DE) Delaware Williams Fertilizer, Inc. Delaware
Williams Field Services - Gulf Coast Company, L.P. Delaware Williams Field Services - Matagorda Offshore Company, LLC Delaware Williams Field Services Company Delaware Williams Field Services Group, Inc Delaware Williams Flexible Generation, LLC Delaware Williams Fractionation Holdings, L.P. Delaware Williams Gas Company Delaware Williams Gas Energy, Inc. Delaware Williams Gas Pipeline - Alliance Canada, Inc. Alberta Williams Gas Pipeline - Alliance U.S., Inc. Delaware Williams Gas Pipeline Company, LLC Delaware Williams Gas Pipeline Mexico, S.A. de C.V. Mexico Williams Gas Pipelines Central, Inc. Delaware Williams Gas Processing - Gulf Coast Company, L.P. Delaware Williams Gas Processing - Kansas Hugoton Company Delaware Williams Gas Processing - Mid-Continent Region Company Delaware Williams Gas Processing - Wamsutter Company Delaware Williams Gas Processing Company Delaware Williams Gas Projects Company, L.L.C. Delaware Williams Gathering & Transportation, L.L.C. Oklahoma Williams Generation Company - Hazleton Delaware Williams Global Energy (Cayman) Limited Cayman Islands Williams Global Holdings Company Delaware Williams GmbH Williams GP Inc. Delaware Williams GP LLC Delaware Williams GSR, L.L.C. Delaware Williams GSX (Canada) Inc. New Brunswick Williams Gulf Coast Gathering Company, LLC Delaware Williams Headquarters Acquisition Company Delaware Williams Headquarters Building Company Delaware Williams Headquarters Building, L.L.C. Delaware Williams Headquarters Management Company Delaware Williams Holdings GmbH Austria Williams Hugoton Compression Services, Inc. Delaware Williams Independence Marketing Company Delaware Williams Indonesia, L.L.C. Delaware Williams Information Services Corporation Delaware Williams Intercontinental Holdings Company Delaware
Williams International (Bermuda) Limited Bermuda Williams International (Operations) Ecuador Limited Cayman Islands Williams International Communications, Inc. Delaware Williams International Company Delaware Williams International Cusiana-Cupiagua Limited Cayman Islands Williams International Ecuador (Cayman) Limited Cayman Islands Williams International Ecuadorian Ventures Bermuda Limited Bermuda Williams International El Furrial Limited Cayman Islands Williams International Guara Limited Cayman Islands Williams International Holdings Limited Cayman Islands Williams International Investment Ventures (Cayman) Limited Cayman Islands Williams International Investments (Cayman) Limited Cayman Islands Williams International Jose Limited Cayman Islands Williams International Oil & Gas (Venezuela) Limited Cayman Islands Williams International Operations (Venezuela) Limited Cayman Islands Williams International Pigap Limited Cayman Islands Williams International Pipeline Company Delaware Williams International Services Company Nevada Williams International Telecom Limited Delaware Williams International Telecommunications Investments (Cayman) Limited Cayman Islands Williams International Venezuela Limited Cayman Islands Williams International Ventures (Bermuda) Ltd. Bermuda Williams Learning Center, Inc. Delaware Williams Lietuva Williams Lynxs Alaska CargoPort, L.L.C. Alaska Williams Memphis Terminal, Inc. Delaware Williams Merchant Services Company, Inc. Delaware Williams Mid-South Pipelines, LLC Delaware Williams Midstream Natural Gas Liquids, Inc. Delaware Williams Mobile Bay Producer Services, L.L.C. Delaware Williams Natural Gas Liquids Canada, Inc. Alberta Williams Natural Gas Liquids, Inc. Delaware Williams Natural Gas Storage, LLC Delaware Williams NGL, LLC Delaware Williams Northern NGL Pipeline, L.L.C. Delaware Williams Oil Gathering, L.L.C. Delaware Williams Olefins Feedstock Pipelines, L.L.C. Delaware Williams Olefins, L.L.C. Delaware Williams OLP, L.P. Delaware
Williams One-Call Services, Inc. Delaware Williams Petroleo Espana SL Spain Williams Petroleum Pipeline Systems, Inc. Delaware Williams Pipe Line Company, LLC Delaware Williams Pipeline Services Company Delaware Williams Pipelines Holdings, L.P. Delaware Williams Production - Gulf Coast Company, L.P. Delaware Williams Production Company, LLC Delaware Williams Production Mid-Continent Company Oklahoma Williams Production RMT Company Delaware Williams Production Rocky Mountain Company Delaware Williams Refining & Marketing, L.L.C. Delaware Williams Relocation Management, Inc. Delaware Williams Resource Center, L.L.C. Delaware Williams Risk Holdings, L.L.C. Delaware Williams Risk Management L.L.C. Delaware Williams Sodium Products Company Delaware Williams Strategic Sourcing Company Delaware Williams Strategic Ventures, LLC Delaware Williams Terminals Company Delaware Williams Terminals Holdings, L.P. Delaware Williams Trading (UK) Ltd. United Kingdom Williams TravelCenters, Inc. Delaware Williams Underground Gas Storage Company Delaware Williams Western Holding Company, Inc. Delaware Williams Western Pipeline Company, LLC Delaware Williams Wireless, Inc. Delaware Williams WPC - I, Inc. Delaware Williams WPC - II, Inc. Delaware Williams WPC International Company Delaware WilMart, Inc. Delaware WILPRISE Pipeline Company, L.L.C. Delaware WilPro Energy Services (El Furrial) Limited Cayman Islands WilPro Energy Services (Pigap II) Limited Cayman Islands Wlliams Energy Canada Pipeline, Inc. New Brunswick Worldwide Services Limited Cayman Islands Worthington Generation, L.L.C. Delaware WPX Enterprises, Inc. Delaware WPX Gas Resources Company Delaware