Exhibit 21 HALLIBURTON COMPANY Subsidiaries of the Registrant December 31, 2003 STATE OR COUNTRY NAME OF COMPANY OF INCORPORATION - --------------- ---------------- Avalon Financial Services, Ltd Cayman Islands Baroid Algeria de Service aux Puits SpA Algeria Baroid Corporation United Kingdom Baroid de Venezuela, S.A. Venezuela Baroid GmbH Germany Baroid International Inc. United States Baroid International Trading, LLC United States Baroid Limited United Kingdom Baroid Nigeria, Inc. United States Baroid of Nigeria Limited Nigeria Beheersmaatschappij van Aandelen in Textielverwerkende Ondernemingen "Betex" B.V." Netherlands BITC (US) LLC United States BITC Holdings (US) LLC United States BPM Minerals, LLC United States Breswater Marine Contracting B.V. Netherlands Brown & Root Cayman Holdings, Inc. Cayman Islands Brown & Root Construction Pty Ltd Australia Brown & Root Projects Pty Ltd Australia Cebar Sdn. Bhd. Brunei Darussalam Combisa, S. de R.L. de C.V. Mexico Corporacion Mexicana de Mantenimiento Integral S. de R.L. de C. V. Mexico Devonport Management Limited United Kingdom Devonport Royal Dockyard Limited United Kingdom DII Industries, LLC United States Dresser Kellogg Energy Services (Nigeria) Ltd. Nigeria Dresser Kellogg Energy Services Inc. United States Georgetown Finance Ltd Caymans Islands Granherne International (Holdings) Ltd United Kingdom Granherne Limited United Kingdom GVA Consultants Aktiebolag Sweden Halliburton Acquisitions Limited United Kingdom Halliburton Affiliates, LLC United States Halliburton Argentina S.A. Argentina Halliburton AS Norway Halliburton Australia Pty. Ltd. Australia Halliburton B.V. Netherlands Halliburton C.I.C.S. Inc. Cayman Islands Halliburton Canada Holdings, Inc. United States Halliburton Company United States Halliburton Company Germany G.m.b.H. Germany Halliburton Consolidated Pty Ltd Australia 21-1 Exhibit 21 HALLIBURTON COMPANY Subsidiaries of the Registrant December 31, 2003 (continued) STATE OR COUNTRY NAME OF COMPANY OF INCORPORATION - --------------- ---------------- Halliburton de Mexico, S. de R.L. de C.V. Mexico Halliburton Denmark A/S Denmark Halliburton Energy Development (North Sea), Inc. United States Halliburton Energy Services (Malaysia) Sdn. Bhd. Malaysia Halliburton Energy Services Nigeria Limited Nigeria Halliburton Energy Services, Inc. United States Halliburton EPC-22 Holdings, S. de R.L. de C.V. Mexico Halliburton Equipment Company S.A.E. Egypt Halliburton Far East Pte Ltd Singapore Halliburton Global, Ltd. Cayman Islands Halliburton Group (Barbados) SRL Barbados Halliburton Group Canada (Partnership) Canada Halliburton Group Canada Inc. Canada Halliburton Group Holdings (1) Company Canada Halliburton Holding Germany GmbH Germany Halliburton Holdings (No. 2) Limited United Kingdom Halliburton Holdings (No. 3) Limited United Kingdom Halliburton Holdings 2002 B.V. Netherlands Halliburton I Cayman, Ltd. Cayman Islands Halliburton Industries AG Liechtenstein Halliburton Interim, Inc. United States Halliburton International, Inc. United States Halliburton Italiana S.p.A. Italy Halliburton Latin America S.A. Panama Halliburton Limited United Kingdom Halliburton Manufacturing and Services Limited United Kingdom Halliburton Netherlands Operations B.V. Netherlands Halliburton Norway Holdings C.V. Netherlands Halliburton Operations Nigeria Limited Nigeria Halliburton Overseas Limited Cayman Islands Halliburton Products & Services Limited Cayman Islands Halliburton Produtos Ltda. Brazil Halliburton Sakhalin Limited Cyprus Halliburton S.A.S. France Halliburton Servicos Ltda. Brazil Halliburton Trinidad Limited Trinidad and Tobago Halliburton West Africa Ltd. Cayman Islands Halliburton Worldwide Limited Cayman Islands HBR Energy, Inc. United States HBR NL Holdings, LLC United States HED (Indonesia), Inc. United States 21-2 Exhibit 21 HALLIBURTON COMPANY Subsidiaries of the Registrant December 31, 2003 (continued) STATE OR COUNTRY NAME OF COMPANY OF INCORPORATION - --------------- ---------------- HES Corporation United States HES Holding, Inc. United States HES Indonesia Holdings, Inc. United States HES Oilfield Operations (Nigeria), Inc. United States Howard Humphreys & Partners Limited United Kingdom Howard Humphreys Group Limited United Kingdom KBR Australia Pty Ltd Australia KBR Group Holdings, LLC United States KBR Holdings Pty Ltd Australia KBR Indonesia Holdings, Inc. United States KBR Overseas, Inc. United States KBR Production Services Pty Ltd Australia KBR Technical Services, Inc. United States KBR Water Services Pty Ltd Australia Kellogg Brown & Root (Canada) Company Canada Kellogg Brown & Root (Services) Limited United Kingdom Kellogg Brown & Root (U.K.) Limited United Kingdom Kellogg Brown & Root Algeria Inc. United States Kellogg Brown & Root Asia Pacific Pte Ltd Singapore Kellogg Brown & Root DH Limited United Kingdom Kellogg Brown & Root Holding B.V. Netherlands Kellogg Brown & Root Holdings (U.K.) Limited United Kingdom Kellogg Brown & Root Holdings Limited United Kingdom Kellogg Brown & Root International, Inc. (A Delaware Corporation) United States Kellogg Brown & Root International, Inc. (A Panamanian Corporation) Panama Kellogg Brown & Root Limited United Kingdom Kellogg Brown & Root Netherlands B.V. Netherlands Kellogg Brown & Root Offshore Contractors 2 B.V. Netherlands Kellogg Brown & Root Projects Limited United Kingdom Kellogg Brown & Root Pty Ltd Australia Kellogg Brown & Root, Inc. United States Kellogg Overseas Corporation United States Kinhill Holdings Pty Ltd Australia Kinhill Pacific Pty Ltd Australia Landmark EAME Limited United Kingdom Landmark Graphics AS Norway Landmark Graphics Corporation United States Laurel Financial Services B.V. Netherlands M. W. Kellogg Constructors Inc. United States M. W. Kellogg Limited United Kingdom Mashhor Well Services Sdn Bhd Brunei Darussalam 21-3 Exhibit 21 HALLIBURTON COMPANY Subsidiaries of the Registrant December 31, 2003 (continued) STATE OR COUNTRY NAME OF COMPANY OF INCORPORATION - --------------- ---------------- Mid-Valley, Inc. United States North Sea Assets Limited United Kingdom Oilfield Services Receivable Corporation United States P.T. Brown & Root Indonesia Indonesia Personal Para Soluciones Optimas, S de RL de CV Mexico PetroData AS Norway Petroleum Engineering Services Norge AS Norway PT Baroid Indonesia Indonesia PT Halliburton Indonesia Indonesia PT Halliburton Logging Services Indonesia Indonesia Rockwater Holdings Limited United Kingdom Rockwater Limited United Kingdom Security DBS N.V. Belgium Servicios Halliburton De Venezuela, S.A. Venezuela Servicios Profesionales Petroleros, S. de R.L. de C.V. Mexico Sigma 3 (North Sea) Limited United Kingdom Sperry-Sun Saudi Arabia Ltd. Saudi Arabia SubSahara Serivces Inc United States WLTD Limited United Kingdom WLTD, Inc. United States 21-4