| Burton Wire and Tube Company Limited | Swadlincote | 1977 |
| Burtonlaine Limited | Hoddesdon | 2022 |
| Burtons Direct Limited | Tonbridge | 2013 |
| Burtons Fabrications Ltd | Middlesbrough | 2026 |
| Burtons Manufacturing Company Limited | Tonbridge | 2013 |
| Burtons Medical Equipment Limited | Tonbridge | 1986 |
| Burtonwood (Midlands) Limited | Beeston | 2011 |
| Burtonwood Fabrication Maintenance Limited | Sale | 2012 |
| Burtonwood Property Limited | Lymington | 2020 |
| Burts Snacks Limited | London | 1991 |
| Burts the Bakers Limited | Brynmenyn | 2020 |
| Burtys Nuts Ltd | Leigh On Sea | 2021 |
| Burvills Limited | Farnham | 1997 |
| Burwell Community Print Centre Limited | Cambridge | 1996 |
| Burwell Reed and Kinghorn Limited | | 1958 |
| Burwood Aviation Supplies Limited | Verwood | 1995 |
| Burwood Building Co Ltd | Weybridge | 2020 |
| Bury Beekeeping Ltd | Bury | 2020 |
| Bury Cables Limited | West Midlands, England | 2024 |
| Bury Denture Clinic Ltd. | Bury | 2015 |
| Bury Fabrications Ltd | Bury | 2006 |
| Bury Pallets Services Limited | Ashton-Under-Lyne | 2014 |
| Bury Powder Coating Ltd | Bury | 2025 |
| Bury Refrigeration Limited | Rochdale | 2006 |
| Bury Repro Design & Digital Print Ltd | Manchester | 2012 |
| Bury Signs Limited | Manchester | 2017 |
| Bury Steam Locomotive Co. Limited(The) | Bury | 1985 |
| Bury Street Arts Limited | Melton Mowbray | 2021 |
| Burzt Drinks Ltd | Leeds | 2025 |
| BUS & Coach Shop Ltd | London | 2020 |
| BUS Body Repairs Limited | Upminster | 2012 |
| BUS Bodyman Limited | Coventry | 2026 |
| BUS Cctv Installations Limited | Motherwell | 2017 |
| BUS Solutions Limited | Lymm | 1987 |
| BUS Stop Clothing Limited | London | 1997 |
| BUS Stop Manufacturing Limited | London | 2020 |
| Bus&Coach World Ltd | Blackburn | 2006 |
| Busbar Solutions Ltd | Bristol | 2022 |
| Busch (UK) Limited | Salop | 1971 |
| Busch GVT Limited | Crewe | 2006 |
| Buseio Ltd | Bathgate | 2026 |
| Bush & Wilton Limited | Tiverton | 2001 |
| Bush and Hart Ltd | Liverpool | 2013 |
| Bush Engineering Services Limited | Gravesend | 1992 |
| Bush Healthcare (Stairlifts ) Limited | Aberdare | 2024 |
| Bush Interiors Ltd | Bishop Auckland | 2022 |
| Bush Ltd | Aylsham | 2024 |
| Bushboard Holdings Limited | Northamptonshire | 2004 |
| Bushboard Limited | Northamptonshire | 2000 |
| Bushboard Washroom Systems Limited | Trentham | 1986 |
| Bushby Engineering Ltd | Oakham | 2014 |
| Bushby Marine Ltd | Poole | 2023 |
| Bushell & Meadows Limited | Gloucestershire | 1962 |
| Bushell Digital Ltd | London | 2019 |
| Bushell's Carpentry Ltd | Littlehampton | 2021 |
| Bushells Bakery Limited | Suffolk | 1992 |
| Bushes Home Bakery Limited | Crumlin | 2021 |
| Bushfield Limited | Oxford | 1974 |
| Bushfire Forge Ltd | Welling | 2016 |
| Bushfire Limited | Enfield | 1995 |
| Bushin International Logistics Co., Ltd | Beckenham | 2014 |
| Bushmaster Fabrications Limited | Presteigne | 2007 |
| Bushnells Fitted Furniture Limited | Hounslow | 2012 |
| Bushwall Limited | Barrow-Upon-Humber | 1995 |
| Business & Energy Management Solutions Ltd | Bath | 2014 |
| Business and Finance Media Limited | London | 2016 |
| Business Connection Media Ltd | Bedford | 2013 |
| Business Csajok Limited | London | 2021 |
| Business Forms Express Limited | Bristol | 1987 |
| Business Furnishings Limited | Chorley | 2013 |
| Business Image Limited | Dorking | 2002 |
| Business Improvement Tools Ltd | High Wycombe | 2013 |
| Business Interiors (GB) Ltd | Peterborough | 2003 |
| Business Iron Development Ltd | Peterborough | 2021 |
| Business Machine Realisations Limited | Cardiff | 1985 |
| Business Machines Service Ltd | Stonehouse | 2007 |
| Business Manager U.K. Limited | Merseyside | 2006 |
| Business Network Europe Limited | Worcester | 2003 |
| Business on Bikes Ltd | Clitheroe | 2011 |
| Business Print (Hinckley) Ltd | Hinckley | 1996 |
| Business Print Services Limited | Brentwood | 2003 |
| Business Systems (U.K.) Limited | London | 1987 |
| Business Waste Management Limited | Northampton | 2012 |
| BUSINESSCOUT24 Ltd | Rochester | 2026 |
| Busiprint Ltd | Deal | 2024 |
| Buslana Textiles Limited | Ashton-Under-Lyne | 2026 |
| Buso Audio Ltd | London | 2025 |
| Busoa Limited | London | 2023 |
| Buss Marine Limited | Berkeley | 2024 |
| Bussey Windows Group Ltd | Stowmarket | 2025 |
| Bussey-Hewitt (Mohair) Limited | Bradford | 1994 |
| Bussey-Hewitt Limited | Bradford | 1974 |
| Busson Controls Limited | Caterham | 2016 |
| Bustle About Limited | Tipton | 2016 |
| Buston Oils Limited | Morpeth | 2024 |
| Busty Boob Tape Ltd | London | 2023 |
| Busty GAL Ltd | Cardiff | 2025 |
| Busy Baker Limited | Ilkeston | 2024 |
| Busy BEE Baked Fruit Tea Ltd | Dartford | 2021 |
| Busy BEE Candles Ltd. | Llandovery | 2015 |