| BULLO27 Ltd | Potton | 2026 |
| Bulloch Cowell & Company Limited | Glasgow | 2012 |
| Bullock and Bosson Limited | Stoke-On-Trent | 2000 |
| Bullockstone Farm Maintenance Limited | Ashford | 2021 |
| Bullseye Associates Ltd | Nottingham | 2025 |
| Bullseye Competitions Ltd | Tyne And Wear | 2025 |
| Bullseye Construction & Maintenance Ltd | Ilford | 2023 |
| Bullseye Hair Ltd | Cleckheaton | 2024 |
| Bullseye RFD Ltd | London | 2025 |
| Bullworthy (Holdings) Limited | Daventry | 2010 |
| Bully Boss Limited | Nottingham | 2020 |
| Bully Elite Ltd | Manchester | 2019 |
| Bully Elite Training & Hydro Ltd | Manchester | 2019 |
| Bully Pulpit Limited | London | 2024 |
| Bullys Barbers Limited | Pontypridd | 2011 |
| Bulmer Brick and Tile Foundation | Sudbury | 2025 |
| Bulmer Hair Shop Ltd | Middlesbrough | 2025 |
| Bulut Maintenance Ltd | London | 2023 |
| BUM BUM TAN Limited | Eastbourne | 2025 |
| Bumbah Ltd | Andover | 2023 |
| Bumbby Services Limited | Nottingham | 2016 |
| Bumble Aesthetics Ltd | Yarm | 2025 |
| Bumble BEE Car Spa Ltd | Edinburgh | 2017 |
| Bumble Bees Limited | Milton Keynes | 1994 |
| Bumble Events Ltd | Cardiff | 2014 |
| Bumble Micropigmentation Ltd | Yarm | 2025 |
| Bumble Tree Limited | Merthyr Tydfil | 2015 |
| Bumblebee Bakewell Lettings Ltd | Little Addington | 2018 |
| Bumblebee Tuna London Ltd | Hampton | 2026 |
| Bumblebee Woodland Trust Limited | Manchester | 1998 |
| Bumbles Ashtead Limited | Ashtead | 2022 |
| Bumbles Day Nursery Limited | Liskeard | 2003 |
| Bumbles Hair Limited | Hollinwood | 2004 |
| Bume International Ltd | Bridgend | 2024 |
| Bume Limited | Bridgend | 2022 |
| Bumi Homeware Ltd | Stanmore | 2020 |
| Bump Accident Management Ltd | Belfast | 2025 |
| Bump and Baby Club Ltd. | Harrow | 2013 |
| Bump Brush Ltd | Beverley | 2011 |
| Bump Connect Limited | Hassocks | 2024 |
| Bump N Chic Ltd | Caterham | 2014 |
| Bump to Bundle Limited | Warrington | 2018 |
| Bump, Birth, Baby & Beyond Ltd | Oldham | 2023 |
| Bumper Bumper Car Wash Ltd | Leigh | 2024 |
| Bumper Films Limited | Somerset | 1989 |
| Bumps to Yummies CIC | Tilbury | 2023 |
| Bunbury Hair Ltd | Nantwich | 2022 |
| Bundlesdealer Ltd | Dagenham | 2025 |
| Bundy Limited | Darlington | 2024 |
| Bundy R Bear Limited | Leicester | 2023 |
| Bune Trading Ltd | London | 2021 |
| Bunea.Pat Ltd | Wembley | 2017 |
| Bungard & Sons Limited | East Sussex | 1940 |
| Bungee Fitness Club Oxfordshire Ltd | Bicester | 2026 |
| Bunis Ltd | Haverfordwest | 2021 |
| Bunker Bushcraft Ltd | Wincanton | 2019 |
| Bunker One (UK) Ltd | London | 2020 |
| Bunks Elite Services Limited | Crawley | 2026 |
| Bunmee Thai Massage Ltd | Walsall | 2024 |
| Bunny Bites Ltd | Southampton | 2018 |
| Bunny Hmua Ltd | West Drayton | 2023 |
| Bunnypair Ltd | London | 2024 |
| Bunraku Tattoo Ltd | Leicester | 2018 |
| Buns & Buns Limited | London | 2018 |
| Bunti Glow and Style Ltd | Camberley | 2026 |
| Bunting Associates Limited | Chorley | 2017 |
| Buntingford DRY Cleaners Limited | Royston | 2009 |
| Buntingford Laser Clinic Ltd | Buntingford | 2025 |
| Buntingford Nails Limited | Buntingford | 2022 |
| Buntingford Textile Services Limited | London | 2009 |
| Bunya for Integrated Services & Business Ltd | Manchester | 2024 |
| Buona Trading Limited | London | 2022 |
| Buonokai Limited | Exeter | 2017 |
| Buoyant Strategy and Consultancy Ltd | Harrogate | 2024 |
| Buoyee Limited | Manchester | 2021 |
| Bupa Care Homes (AKW) Limited | London | 2000 |
| Bupa Care Homes (ANS) Limited | London | 1985 |
| Bupa Care Homes (BNH) Limited | London | 1986 |
| Bupa Care Homes (HH Leeds) Limited | London | 2008 |
| Bupa Foundation | London | 2015 |
| Bura Properties Arnold Limited | Nottingham | 2021 |
| Buractimm Limited | Folkestone | 1992 |
| Buraczek Ltd | Peterborough | 2014 |
| Burak Mobile Barber Ltd | Glasgow | 2024 |
| Buraq Marine Limited | Lowestoft | 2025 |
| Buraq Universal Limited | Leicester | 2025 |
| Burbent Limited | London | 2020 |
| Burbuys Ltd | Nottingham | 2012 |
| Burchell Assessors Limited | Woodcross | 2013 |
| Burcote Residents' Association Limited | Kingston Upon Thames | 1972 |
| Burcroft Physio Limited | South Yorkshire | 2007 |
| Burden Consultants Ltd | Buckingham | 2022 |
| Burdett and Coutt's Ltd | Liverpool | 2004 |
| Burdon Family Holdings Limited | Colchester | 2025 |
| Burdon Grange Care Home Limited | Wadebridge | 2012 |
| Burdons Farm Limited | Waltham St Lawrence | 1964 |
| Bureau Frances Delvarr Ltd | London | 1983 |
| Bureau Management Strategies Ltd | Bolton | 2023 |
| Bureau of International Standard Limited | Cardiff | 2017 |
| Bureau Veritas Certification UK Limited | Birmingham | 1988 |