| Babcock Hitachi KK (Covered by Hitachi Ltd - Japan) | Japan | Power |
| Babcock Integrated Technology | United Kingdom | Power |
| Babcock Marine Rosyth | United Kingdom | Engineering and Fabrication |
| BAE Systems - RO Defence (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems (Commercial Aircraft) (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems (Dynamics) (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems (Military Aircraft & Aerostructures) (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems (Operations) Ltd (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems (USA) (Covered by BAE Systems PLC - United Kingdom) | United States | Engineering and Fabrication |
| BAE Systems Aerostructures (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems Astute Class Ltd (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE SYSTEMS Australia (Covered by BAE Systems PLC - United Kingdom) | Australia | Aerospace |
| BAE SYSTEMS Avionics Systems (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems Defence (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Electronics Ltd (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Electronics and Sensors |
| BAE Systems Global Combat Systems (Covered by BAE Systems Global Combat Systems Limited - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Global Combat Systems Limited | United Kingdom | Engineering and Fabrication |
| BAE Systems Global Combat Systems Limited (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Global Combat Systems Munitions Limited (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Govan (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Land Systems (Bridging) Limited (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Land Systems UK (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Ltd (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems Marine Ltd (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems PLC | United Kingdom | Aerospace |
| BAE Systems Power & Control Ltd (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Aerospace |
| BAE Systems RO Defence (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems RO Weapons (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Shared Services PAG (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Southeast Shipyards (Covered by BAE Systems PLC - United Kingdom) | United States | Engineering and Fabrication |
| BAE Systems Surface Ships Limited (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Surface Ships Support Limited (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Engineering and Fabrication |
| BAE Systems Underwater Systems (Covered by BAE Systems PLC - United Kingdom) | United Kingdom | Electronics and Sensors |
| BAE Systems, Ground Systems (Covered by BAE Systems PLC - United Kingdom) | United States | Engineering and Fabrication |
| Balikesir Elektromekanik Sanayi Tesisleri A.S. | Turkey | Power |
| Balltec Limited | United Kingdom | Oil and Gas |
| Baoshan Iron & Steel Co Ltd | China | Equipment Consumables and Materials |
| Baosteel Industry Inspection Ltd (Covered by Baoshan Iron & Steel Co Ltd - China) | China | Equipment Consumables and Materials |
| Barrett Steel Energy Products - Forge & Machine Shop | United Kingdom | Oil and Gas |
| Bauknecht Hausgeräte GmbH (Covered by Whirlpool Europe Srl - Italy) | Germany | Electronics and Sensors |
| Bayards Aluminium Constructies BV | Netherlands | Engineering and Fabrication |
| Bechtel Ltd | United Kingdom | Oil and Gas |
| Beijing Aeronautical Manufacturing Technology Research Institute | China | Aerospace |
| BEL Valves (A Division of British Engines Ltd) | United Kingdom | Oil and Gas |
| Bespak Europe Ltd | United Kingdom | Medical |
| bf1 Systems Ltd | United Kingdom | Automotive |
| BG Americas & Global LNG (Covered by BG Group - United Kingdom) | United States | Oil and Gas |
| BG Brazil (Covered by BG Group - United Kingdom) | Brazil | Oil and Gas |
| BG Exploration and Production India Limited (Covered by BG Group - United Kingdom) | India | Oil and Gas |
| BG Group | United Kingdom | Oil and Gas |
| BG Group plc (Covered by BG Group - United Kingdom) | United Kingdom | Oil and Gas |
| BG International Downstream (Covered by BG Group - United Kingdom) | United Kingdom | Oil and Gas |
| BG Trinidad & Tobago (Covered by BG Group - United Kingdom) | Trinidad and Tobago | Oil and Gas |
| BG Tunisia (Covered by BG Group - United Kingdom) | Tunisia | Oil and Gas |
| BHP Billiton Petroleum (Americas) Inc (Covered by BHP Billiton Petroleum Pty Ltd - Australia) | United States | Oil and Gas |
| BHP Billiton Petroleum Ltd (Covered by BHP Billiton Petroleum Pty Ltd - Australia) | United Kingdom | Oil and Gas |
| BHP Billiton Petroleum Pty Ltd | Australia | Oil and Gas |
| Big Three Industries Inc (Covered by Air Liquide - France) | United States | Equipment Consumables and Materials |
| Biomet UK Healthcare Ltd | United Kingdom | Medical |
| Black Cat Engineering & Construction W.L.L. | Qatar | Oil and Gas |
| Blacks Equipment Ltd (Covered by Thompson Friction Welding Ltd - United Kingdom) | United Kingdom | Equipment Consumables and Materials |
| Blohm + Voss Repair GmbH | Germany | Engineering and Fabrication |
| BNS Nuclear Services Ltd | United Kingdom | Power |
| BOC Gases (Covered by BOC Ltd - United Kingdom) | United Kingdom | Equipment Consumables and Materials |
| BOC Gases Americas (Covered by BOC Ltd - United Kingdom) | United States | Equipment Consumables and Materials |
| BOC Gases China (Covered by BOC Ltd - United Kingdom) | China | Equipment Consumables and Materials |
| BOC Gases Europe (Covered by BOC Ltd - United Kingdom) | United Kingdom | Equipment Consumables and Materials |
| BOC Gases New Zealand Limited (Covered by BOC Ltd - United Kingdom) | New Zealand | Equipment Consumables and Materials |
| BOC Health Care (Covered by BOC Ltd - United Kingdom) | United Kingdom | Equipment Consumables and Materials |
| BOC Ltd | United Kingdom | Equipment Consumables and Materials |
| BOC Process Plants (Covered by BOC Ltd - United Kingdom) | United Kingdom | Equipment Consumables and Materials |
| BOC Tradequip (Covered by BOC Ltd - United Kingdom) | United Kingdom | Equipment Consumables and Materials |
| Boeing Commercial Airplanes (Covered by Boeing Company, The - United States) | United States | Aerospace |
| Boeing Company, The | United States | Aerospace |
| Boeing Research & Technology Europe SL (Covered by Boeing Company, The - United States) | Spain | Aerospace |
| Bombardier Aerospace Shorts | United Kingdom | Aerospace |
| Bombardier Transportation (Derby) | United Kingdom | Engineering and Fabrication |
| Borealis AB (Covered by Borealis AG - Austria) | Sweden | Oil and Gas |
| Borealis AG | Austria | Oil and Gas |
| Borealis GmbH (Covered by Borealis AG - Austria) | Austria | Oil and Gas |
| Borealis Group Services AS (Covered by Borealis AG - Austria) | Norway | Oil and Gas |
| Borealis Kallo NV (Covered by Borealis AG - Austria) | Belgium | Oil and Gas |
| Borealis Polymers GmbH (Covered by Borealis AG - Austria) | Germany | Oil and Gas |
| Borealis Polymers NV (Covered by Borealis AG - Austria) | Belgium | Power |
| Borealis Polymers Oy (Covered by Borealis AG - Austria) | Finland | Oil and Gas |
| Borealis Polyolefine GmbH (Covered by Borealis AG - Austria) | Austria | Oil and Gas |
| Bosch Thermotechnology Ltd | United Kingdom | Engineering and Fabrication |
| Bosch Thermotecnologia SA (Covered by Bosch Thermotechnology Ltd - United Kingdom) | Portugal | Engineering and Fabrication |
| Boston Scientific Corporation | United States | Medical |
| Boston Scientific CRM (Covered by Boston Scientific Corporation - United States) | Ireland | Medical |
| Boston Scientific Ireland Ltd (Covered by Boston Scientific Corporation - United States) | Ireland | Medical |
| Boustead International Heaters Ltd | United Kingdom | Oil and Gas |
| Bouygues TP/Laing O'Rourke Joint Venture | United Kingdom | Power |
| BP (Covered by BP plc - United Kingdom) | Vietnam | Oil and Gas |
| BP Alternative Energy (Covered by BP plc - United Kingdom) | United Kingdom | Power |
| BP America Inc (Covered by BP plc - United Kingdom) | United States | Oil and Gas |
| BP America Production Co (Covered by BP plc - United Kingdom) | United States | Oil and Gas |
| BP Americas (Covered by BP plc - United Kingdom) | United States | Oil and Gas |
| BP AMOCO Exploration (Covered by BP plc - United Kingdom) | United States | Oil and Gas |
| BP Amoco Exploration (In Amenas) Ltd (Covered by BP plc - United Kingdom) | Algeria | Oil and Gas |
