| Britpol Rugby Union Limited | Hornchurch | 2025 |
| Britpop Roadshow Limited | Holborn | 2025 |
| Britslap Ltd | Liverpool | 2025 |
| Britsot Management Ltd | London | 2019 |
| Brittan Associates Limited | London | 2011 |
| Brittany Forest Lakes Limited | Bridport | 2020 |
| Britten Estate Limited(The) | Aldeburgh | 1986 |
| Britten Pears Arts | Saxmundham | 1970 |
| Britten Sinfonia Ltd. | Cambridge | 1980 |
| Britten Sinfonia Productions Limited | Cambridge | 2017 |
| Britten-Pears Foundation(The) | Aldeburgh | 1986 |
| Brittle Media Ltd | London | 2025 |
| Britton Golf Limited | Burry Port | 2017 |
| Britx Limited | Edinburgh | 2018 |
| Britx Sports Limited | Edinburgh | 2018 |
| Brixham Admiral Swim Company Ltd | Brixham | 2006 |
| Brixham Arts & Theatre Society | Brixham | 2013 |
| Brixham Clubhouse Limited | Brixham | 2015 |
| Brixham Cricket Club | Brixham | 2016 |
| Brixham Junior Sailing Club Limited | Brixham | 2002 |
| Brixham Pirate Festival Limited | Brixham | 2015 |
| Brixham Railway Heritage Trail CIC | Brixham | 2023 |
| Brixham Rugby Football Club Limited | Brixham | 2015 |
| Brixton Community Based Ltd | London | 2000 |
| Brixton Disco Festival Limited | Knowle | 2017 |
| Brixton Electric Operating Company Limited | London | 2011 |
| Brixton Events Group Ltd | North Harrow | 2026 |
| Brixton Fitness Limited | Dudley | 2023 |
| Brixton House Limited | London | 1984 |
| Brixton House Trading Limited | London | 2024 |
| Brixton Sauna Garden Limited | London | 2026 |
| Brixton Streetgym Ltd | London | 2025 |
| Brixtonrunnaz Ltd | London | 2025 |
| Brixworth Cricket Club Limited | Northampton | 2008 |
| Brixx Gym Ltd | Brigg | 2021 |
| Brizfit Limited | Bristol | 2024 |
| Bri’S Strength and Fitness Limited | Bolton | 2025 |
| Brjd Ltd | London | 2026 |
| BRL Global Partners Ltd | London | 2025 |
| BRL Padel Ltd | Northampton | 2026 |
| Brlpp CIC | Bath | 2023 |
| BRM Physiques Ltd | Swansea | 2024 |
| BRO Ffestiniog CYF. | Blaenau Ffestiniog | 2000 |
| BRO2HER Ltd | Leigh-On-Sea | 2024 |
| Broad BAT Limited | Crowborough | 2019 |
| Broad EYE Windmill (Stafford) | Stafford | 2001 |
| Broad Minded Events Limited | Hatfield | 2007 |
| Broad Reach Projects Limited | Southampton | 2010 |
| Broad View Riding School Limited | Nottingham | 2014 |
| Broadbridge Heath Football Club Limited | Horsham | 2018 |
| Broadcast (1996) Limited | Epsom | 1996 |
| Broadcast Glasgow Community CIC | Glasgow | 2024 |
| Broadfields United Football Club Limited | Stanmore | 2024 |
| Broadhalfpenny Down Preservation Trust | Southampton | 2010 |
| Broadland Agility Dog Club Ltd | Norwich | 2024 |
| Broadland Carriages Ltd | Great Yarmouth | 2018 |
| Broadland Sun Association Limited | Norwich | 1973 |
| Broadlands Leisure Limited | Wolverhampton | 2020 |
| Broadley Investments Limited | Borehamwood | 1992 |
| Broadley Music (International) Limited | Borehamwood | 1994 |
| Broadley Records Limited | Borehamwood | 1990 |
| Broadoak Sporting Club Ltd | Taunton | 2017 |
| Broads Premier Ltd | King'S Lynn | 2018 |
| Broads Sailing Holidays Ltd | Great Yarmouth | 2019 |
| Broadscope Studios Ltd | Glasgow | 2015 |
| Broadstage Live Ltd | Reading | 2025 |
| Broadstreet RFC Club Activities Ltd | Coventry | 2025 |
| Broadsword Charters Limited | Prestwick | 1987 |
| Broadview Farm Rural Holidays Ltd | Alton | 2013 |
| Broadwater Park Golf Club Limited | Okehampton | 1985 |
| Broadwater Sports Club Limited | Godalming | 2011 |
| Broadway Band Ltd | Heybridge | 2026 |
| Broadway BAO CIC | Peterborough | 2025 |
| Broadway Bella's Limited | Great Yarmouth | 2021 |
| Broadway Car Show CIC | Broadway | 2022 |
| Broadway Dawgs Limited | London | 2019 |
| Broadway Entertainment Group Limited | London | 2012 |
| Broadway Fine Art Limited | Northampton | 2006 |
| Broadway Golf Club Limited | Worcestershire | 1946 |
| Broadway Media Europe Ltd | London | 2021 |
| Broadway Musical Productions Limited | London | 2012 |
| Broadway School of Performing Arts Ltd | Paisley | 2023 |
| Broadway Studios Ltd | London | 2021 |
| Broadway Tower Country Park Limited | Worcestershire | 1980 |
| Broadway Travel Limited | Middlesex | 1985 |
| Broadways Farm Shoot Limited | Taunton | 2024 |
| Broccoli Arts Limited | London | 2019 |
| Brock Media Limited | Maidstone | 2012 |
| Brockenhurst Riding Stables Limited | New Milton | 2013 |
| Brocket Hall (UK) Limited | Hertford | 2016 |
| Brocket Hall Golf & Country Club Limited | Welwyn Garden City | 2024 |
| Brockfield Hall Limited | North Yorkshire | 2006 |
| Brockham Badgers Football Club Limited | Guildford | 2012 |
| Brockham Big Field Community Sports Limited | Betchworth | 2008 |
| Brockham Bonfire Ltd. | Betchworth | 1997 |
| Brockley Hot POD Yoga Ltd | Salisbury | 2022 |
| Brocks Fireworks Limited | Hythe | 2012 |
| Brockweir CIC | Lydney | 2016 |
| Brocton Football Club Limited | Stafford | 2005 |
| Brodie Films Limited | Glasgow | 2024 |