EX-21.1 3 kbr-ex211x01022026.htm EX-21.1
Exhibit 21.1
LIST OF SUBSIDIARIES
KBR, INC.
Subsidiaries of Registrant as of January 2, 2026

NAME OF COMPANY |  | COUNTRY OF INCORPORATION
Affinity Capital Works Limited |  | United Kingdom
Affinity Flying Services Limited |  | United Kingdom
Affinity Flying Training Services Limited |  | United Kingdom
AOC International Limited |  | United Kingdom
Asesoria Gerencial de Recursos Humanos, S. de R.L. de C. V. |  | Mexico
Aspire Defence Capital Works JV |  | United Kingdom
Aspire Defence Finance PLC |  | United Kingdom
Aspire Defence Holdings Limited |  | United Kingdom
Aspire Defence Limited |  | United Kingdom
Aspire Defence Services JV |  | United Kingdom
Aspire Defence Services Limited |  | United Kingdom
Åström Logistics AB |  | Sweden
BE&K de Mexico, S.A. de C.V. |  | Mexico
BE&K, Inc. |  | United States
BE&KGIFFELS |  | United States
BetterKonnected Joint Venture |  | Australia
Blandford Offshore Services Limited |  | United Kingdom
Bonny 7 Project Management Company Limited |  | United Kingdom
Bristol Management Centre Limited |  | United Kingdom
Brown & Root Highlands Fabricators Limited |  | United Kingdom
Brown & Root Industrial Services Canada Corporation |  | Canada
Brown & Root Industrial Services De Mexico |  | Mexico
Brown & Root Industrial Services Holdings, LLC |  | United States
Brown & Root Industrial Services Puerto Rico C.R.L. |  | Puerto Rico
Brown & Root Industrial Services, LLC |  | United States
Dependable Global Solutions, LLC |  | United States
Eitec LTD |  | United Kingdom
Fasttrax Holdings Limited |  | United Kingdom
Fasttrax Limited |  | United Kingdom
Frazer-Nash Australia Pty Ltd |  | Australia
Frazer-Nash Consultancy Limited |  | United Kingdom

NAME OF COMPANY |  | COUNTRY OF INCORPORATION
Frazer-Nash Consultancy LLC |  | United States
FTX Logistics Limited |  | United Kingdom
Granherne Limited |  | United Kingdom
Harmonic Limited |  | United Kingdom
HomeSafe Alliance LLC |  | United States
Howard Humphreys (Kenya) Limited |  | Kenya
Infrastar Limited |  | United Kingdom
JGC-KBR Venture (In Salah Project) |  | Cayman Islands
KBR - Aurecon Joint Venture |  | Australia
KBR (Aspire Construction Ventures) Holdings Ltd |  | United Kingdom
KBR (Aspire Construction Ventures) Holdings No 2 Ltd |  | United Kingdom
KBR (Aspire Construction Ventures) Ltd |  | United Kingdom
KBR (Aspire Construction) Holdings Limited |  | United Kingdom
KBR (Aspire Construction) Holdings No.2 Limited |  | United Kingdom
KBR (Aspire Construction) Limited |  | United Kingdom
KBR (Aspire Services Ventures) Holdings Ltd |  | United Kingdom
KBR (Aspire Services Ventures) Holdings No.2 Ltd |  | United Kingdom
KBR (Aspire Services Ventures) Ltd |  | United Kingdom
KBR (Aspire Services) Holdings Limited |  | United Kingdom
KBR (Aspire Services) Holdings No.2 Limited |  | United Kingdom
KBR (Aspire Services) Limited |  | United Kingdom
KBR (I) Limited |  | United Kingdom
KBR (U.K.) Investments Limited |  | United Kingdom
KBR Abr al Bihar General Services, Trade and General Contracting, LLC |  | Iraq
KBR Al-Yusr Limited Company |  | Saudi Arabia
KBR Arabia Limited |  | Saudi Arabia
KBR Australia Pty Ltd |  | Australia
KBR Canada Ltd |  | Canada
KBR Charitable Foundation, Inc. |  | United States
KBR Conscia JV |  | Australia
KBR Construction Company, LLC |  | United States
KBR Diego Garcia, LLC |  | United States
KBR Employment Services Limited |  | United Kingdom
KBR Engineering Company, LLC |  | United States
KBR Engineering of North Carolina, Inc. |  | United States
KBR General Partner Limited |  | United Kingdom
KBR Gerenciamento de Projectos e Servicos de Estudos Industriais Conceituais Basicos E De. |  | Brazil

NAME OF COMPANY |  | COUNTRY OF INCORPORATION
KBR Global Project Support Limited |  | Cayman Islands
KBR GMBH |  | Germany
KBR Holdings Pty Ltd |  | Australia
KBR Holdings, LLC |  | United States
KBR Industrial Canada Co. |  | Canada
KBR Investments Limited |  | United Kingdom
KBR Jacobs JV (Kingsford Smith Drive Upgrade Project) |  | Australia
KBR Jersey Limited |  | Jersey
KBR Monterrey S.A. de C.V. |  | Mexico
KBR Overseas, Inc. |  | United States
KBR PNG Limited |  | Papua New Guinea
KBR Poland Spolka z.o.o. |  | Poland
KBR Services Canada ULC |  | Canada
KBR Services Cayman Limited |  | Cayman Islands
KBR Services, LLC |  | United States
KBR Services, S.A.R.L. |  | Djibouti
KBR Technical Services, Inc. |  | United States
KBR WABI LTD. |  | Canada
KBR Wyle Services, LLC |  | United States
KBR, Inc. |  | United States
KBR-Aurecon JV-SA Water |  | Australia
KBR-Aurecon JV-Water Sec |  | Australia
KBR-Descon JV |  | Qatar
KBS Maritime Limited |  | United Kingdom
Kellogg (Malaysia) Sdn. Bhd. |  | Malaysia
Kellogg Brown & Root (Greenford) Limited |  | United Kingdom
Kellogg Brown & Root (Norway) AS |  | Norway
Kellogg Brown & Root (Services) Limited |  | United Kingdom
Kellogg Brown & Root (U.K.) Limited |  | United Kingdom
Kellogg Brown & Root (Ukraine) LLC |  | Ukraine
Kellogg Brown & Root Asia Pacific Pte Ltd |  | Singapore
Kellogg Brown & Root Consultancy (Malaysia) Sdn Bhd |  | Malaysia
Kellogg Brown & Root Engineering & Construction India Private Limited |  | India
Kellogg Brown & Root Engineering Consultancy LLC |  | Oman
Kellogg Brown & Root Engineering Corporation |  | United States
Kellogg Brown & Root GmbH |  | Germany
Kellogg Brown & Root Group Limited |  | United Kingdom
Kellogg Brown & Root Healthcare Trustee Limited |  | United Kingdom

NAME OF COMPANY |  | COUNTRY OF INCORPORATION
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 Iberia, S.L. |  | Spain
Kellogg Brown & Root International (MWK) Limited |  | United Kingdom
Kellogg Brown & Root International Group Limited |  | United Kingdom
Kellogg Brown & Root International, Inc. |  | United States
Kellogg Brown & Root Investment Holdings Limited |  | United Kingdom
Kellogg Brown & Root Limited |  | United Kingdom
Kellogg Brown & Root Limited- Azmi Abdullatif Abdulhadi and Abdullah Mahana Al-Moaibed Professional Company |  | Saudi Arabia
Kellogg Brown & Root LLC |  | United States
Kellogg Brown & Root Nigeria Limited |  | Nigeria
Kellogg Brown & Root Overseas Limited |  | United Kingdom
Kellogg Brown & Root Overseas Projects Limited |  | United Kingdom
Kellogg Brown & Root Projects Limited |  | United Kingdom
Kellogg Brown & Root Pty Ltd |  | Australia
Kellogg Brown & Root Pty Ltd - Transport for Tomorrow |  | Australia
Kellogg Brown & Root Pty Ltd - WaterSecure |  | Australia
Kellogg Brown & Root Pty Ltd & MetConnx |  | Australia
Kellogg Brown & Root Regional Headquarters |  | Saudi Arabia
Kellogg Brown & Root Saudi Ltd. Co. |  | Saudi Arabia
Kellogg Brown & Root Services B.V. |  | Netherlands
Kellogg Brown & Root Services International, Inc. |  | United States
Kellogg Brown & Root Services LLC |  | Oman
Kellogg Brown & Root Sustainable Technology Solutions Limited |  | United Kingdom
Kellogg Brown & Root Technology (Beijing) Co. Ltd |  | China
Kellogg Brown & Root Trustees Limited |  | United Kingdom
Kellogg France, S.A. |  | France
KHA Defence Solutions Pty Ltd |  | Australia
Kord Technologies, LLC |  | United States
KSA-AJO JV |  | Indonesia
Labor Support Services Limited |  | Cayman Islands
Laurel Financial Services B.V. |  | Netherlands
Mantenimiento Marino de Mexico, S. de R.L. de C.V. |  | Mexico
Mission Technologies Defence Pty Ltd |  | Australia
Mission Technologies Holdings Pty Ltd |  | Australia
Mission Technologies Services Pty Ltd |  | Australia

NAME OF COMPANY |  | COUNTRY OF INCORPORATION
MMM-SS Holdings, LLC |  | United States
Overseas Supply Services Limited |  | United Kingdom
Phoenix (U.K.) Fusion Limited |  | United Kingdom
PT KBR Indonesia |  | Indonesia
PT Roberts Schaefer Soros Indonesia |  | Indonesia
Semi Sub Services B.V. |  | Netherlands
Solar MTS Holdings LLC |  | United States
Solar MTS Limited |  | United Kingdom
Solar MTS LLC |  | United States
Solar Spinco Inc |  | United States
Solutions Insurance Company |  | United States
Sustainable System Solutions, LLC |  | United States
Systra - KBR Joint Venture |  | Australia
Technical Staffing Resources Limited |  | United Kingdom
Technical Staffing Resources, LLC |  | United States
VIMA Bristol Limited |  | United Kingdom
VIMA Consultancy Limited |  | United Kingdom
VIMA Group Consultancy Limited |  | United Kingdom
VIMA Group Holdings Limited |  | United Kingdom
VIMA Group Services Limited |  | United Kingdom
Vinnell Brown & Root LLC |  | United States
Wyle Inc. |  | United States

* KBR, Inc. maintains over 100 subsidiaries. Set forth above are the names of certain controlled subsidiaries, at least 50% owned, directly or indirectly, of KBR, Inc. as of January 2, 2026. The names of certain subsidiaries have been omitted from this Exhibit 21.1 in accordance with applicable rules. The omitted subsidiaries, considered in the aggregate as a single subsidiary, did not constitute a “significant subsidiary” (as defined in Rule 1-02(w) of Regulation S-X) at January 2, 2026.