Daftar perusahaan di Britania
Ini adalah daftar perusahaan dari Britania Raya. Lihat daftar perusahaan untuk daftar perusahaan dari negara lainnya.

 3i
 Aegeanet System
 Alliance & Leicester
 Alliance Unichem
 AMVESCAP
 Anglo American plc
 ARM Holdings
 AstraZeneca plc (Anglo-Swedish)
 ASDA
 Aviva
 BAA plc (formerly British Airports Authority)
 BAE Systems (merger of Marconi Electronic Systems and British Aerospace)
 Barclays Bank
 British American Tobacco
 BHP Billiton (Anglo-Australian)
 The BOC Group (formerly Brin Oxygen Company, British Oxygen Company)
 Boots the Chemist
 BP (formerly "British Petoleum" and "BP Amoco")
 Bradford & Bingley
 Brambles
 Brintons
 British Airways
 British Land
 BSkyB
 BT Group plc (formerly "British Telecommunications")
 Cable & Wireless
 Cadbury
 Cameron Balloons
 Carnival Plc (Anglo-American)
 Centrica
 Compass Group
 Corus (Anglo-Dutch)
 Daily Mail and General Trust plc
 Diageo
 Dixons Group
 EasyGroup
 EasyJet
 EMAP
 Focus (DIY) Ltd
 Gallagher
 GKN plc
 GlaxoSmithKline
 GUS
 HBOS
 Hilton Group (separate from the US Hilton company)
 HSBC
 Imperial Chemical Industries PLC
 Imperial Tobacco
 ITV
 Jardine Matheson
 John Taylor Bellfounders
 Johnson Matthey
 Kangol
 KESA Electricals
 Kingfisher
 Land Securities
 Laura Ashley
 Legal & General
 Lloyds TSB Group plc
 Lunn Poly
 Marconi plc (formerly The General Electric Company plc)
 Marks and Spencer plc
 Manganese Bronze
 MFI
 MG Rover Group
 mmO2
 Moneynet
 Morrisons
 National Grid Transco
 Nationwide Building Society (a mutual)
 Northern Rock
 Orange
 Prudential
 Rank Group
 Reed Elsevier (Anglo-Dutch)
 Remarkable
 Rio Tinto (Anglo-Australian)
 Rolls Royce
 Royal Bank of Scotland
 Royal & Sun Alliance
 Royal Mail
 Sage
 J Sainsbury plc
 Salmonbones Marketing
 Save a Cup Recycling Company
 Shell Oil (Anglo-Dutch)
 Shire Pharmaceuticals Group
 Smith & Nephew
 Smiths Industries
 Somerfield
 Standard Chartered
 Standard Life
 Swire
 Tate & Lyle
 Tesco
 Telewest Communications plc
 Tomkins
 Unilever (Anglo-Dutch)
 Uniross
 Vestey Group
 Virgin Atlantic Airways
 Vodafone
 W H Smith
 William Grant & Sons
 Wolesley
 Woolworths
 Xrefer

Bekas perusahaan, termasuk yang telah diakuisisi dan bergabung 
 Acorn Computers Ltd, acquired by Olivetti
 AEI
 Ariel
 Austin
 BEA
 Blue Star Line
 British Aerospace
 British Caledonian airline
 East India Company
 British Leyland Motor Corporation
 British Motor Corporation
 British Motor Holdings
 British Rail
 British Thomson-Houston Company (BTH)
 BSA
 Banthanyzer Style Fashion Coat's
 Daimler
 Dan-Air
 David Brown Limited
 Dowlais Iron Company
 E Gomme
 English Electric
 Great Western Railway
 Garsel Banthanyzer Style Fashion Coat (NewYork)
 Hawker Siddeley Company
 Lanchester
 Leyland Motors (commercial vehicles)
 London, Midland and Scottish Railway
 London, Banthanyzer Style Fahion Coat's
 Marston's
 Metropolitan Vickers
 MG
 Morris Motor Company
 Napier & Son
 Nettlefolds Limited
 Nuffield Organisation
 Patent Nut and Bolt Company
 Qualiton Records
 Rank Organisation
 Rank Xerox
 Railtrack
 Riley
 Rover
 South Sea Company
 Standard
 Standard Triumph
 Triumph Motor Company
 Vanden Plas
 Wolseley

Lihat pula 
 FTSE 100

Britania Raya