| Brighterlight LED Limited | Manufacturing | 2008 |
| Brighterman Stationery Company Limitid Ltd | Wholesale & retail | 2021 |
| Brightlight Production Services Ltd | Arts & recreation | 2018 |
| Brightlights Driving School Limited | Education | 2019 |
| Brightlink Learning Ltd | Education | 2015 |
| Brightlist Limited | Real estate | 2015 |
| Brightnite Limited | Financial services | 2022 |
| Brighton Building Contractors Ltd | Construction | 2021 |
| Brighton Fine Jewellery Ltd | Wholesale & retail | 2025 |
| Brighton Hearing Care Limited | Health & social care | 2016 |
| Brightpath Consultancy Limited | Professional & scientific | 2017 |
| Brightpath Educate Ltd | Education | 2026 |
| Brightpath Innovation Limited | Information & communication | 2026 |
| Brightwater Research | Manufacturing | 2020 |
| Brightwell Links PC | | 2016 |
| Brightwells Employee Ownership Trustee Limited | Professional & scientific | 2025 |
| Brightworth Ltd | Wholesale & retail | 2025 |
| Brigitta Ltd | Wholesale & retail | 2016 |
| Brigter Limited | Wholesale & retail | 2019 |
| Briinelloo Ltd | Wholesale & retail | 2025 |
| Brill Upvc Ltd | Construction | 2024 |
| Brillant Webdesign Ltd | Information & communication | 2025 |
| Brilliance Investment PC | | 2017 |
| Brilliance Management Ltd | Professional & scientific | 2024 |
| Brilliant Smiles Ltd | Health & social care | 2025 |
| Brilliant Touch Ltd | Administrative & support | 2026 |
| Brinavo Ltd | Education | 2025 |
| Brindley Developments Limited | Real estate | 2017 |
| Brindleys Business Services Limited | Information & communication | 2019 |
| Brine&Son Earthworks Ltd Ltd | Construction | 2024 |
| Brinessa Ltd | Health & social care | 2016 |
| Bring Back Sparkle Ltd | Administrative & support | 2012 |
| Bring Home Limited | Wholesale & retail | 2020 |
| Brinilzea Ltd | Wholesale & retail | 2021 |
| Brinkworth Advisory Ltd | Professional & scientific | 2025 |
| Brinzium Ltd | Administrative & support | 2023 |
| Briowines Ltd | Wholesale & retail | 2026 |
| Briq Interiors Ltd | Wholesale & retail | 2025 |
| Brisc Ltd | Financial services | 2022 |
| Briscoe Investment Group Ltd | Financial services | 2019 |
| Brishear Co., Ltd | Wholesale & retail | 2021 |
| Bristol & District Estates Limited | Wholesale & retail | 2002 |
| Bristol & South West Loft Conversions Limited | Construction | 2017 |
| Bristol and Bath Bricklaying Services Ltd | Construction | 2021 |
| Bristol and Bath Removals Ltd | Construction | 2023 |
| Bristol Channel Diving Services Limited | Arts & recreation | 1995 |
| Bristol Coalmining Archives Limited | Other services | 1988 |
| Bristol Endoscopy Training Collaborative CIC | Health & social care | 2021 |
| Bristol Fabrications Limited | Manufacturing | 2020 |
| Bristol Group Services Limited | Construction | 2017 |
| Bristol Insulation Services Limited | Construction | 2018 |
| Bristol Premier Cleaning Limited | Administrative & support | 2020 |
| Brit Education Limited | Education | 2025 |
| Brit PAK Traders Ltd | Wholesale & retail | 2019 |
| Brit Route Ltd | Administrative & support | 2023 |
| Brit Source Global Recruit Ltd | Professional & scientific | 2023 |
| Brit-In Building and Property Management Ltd | Construction | 2019 |
| Britania Trading Limited | Construction | 2018 |
| Britannia Brewery Ltd | Manufacturing | 2023 |
| Britannia Capital Investments Holdings Limited | Financial services | 2024 |
| Britannia Capital Investments Limited | Construction | 2022 |
| Britannia Consulting Ltd | Construction | 2026 |
| Britannia Europe Consulting UK Ltd | Professional & scientific | 2020 |
| Britannia High Level Ltd | Education | 2025 |
| Britannia Trade Group Ltd | Wholesale & retail | 2024 |
| Britannicbay Ltd | Wholesale & retail | 2025 |
| Britbolton Consulting Services Limited | Professional & scientific | 2012 |
| Britcrest Maritime Trading Ltd | Wholesale & retail | 2025 |
| Brite IT Consultants Limited | Information & communication | 2015 |
| Brite Teamwear Ltd | Wholesale & retail | 2024 |
| Britinspection Limited | Professional & scientific | 2025 |
| British Boxing Board of Control Limited | Arts & recreation | 1988 |
| British Flame Research Committee | Professional & scientific | 1956 |
| British Inherited Cardiovascular Conditions Society Ltd | Health & social care | 2015 |
| British Moroccan Assembly C.I.C. | Administrative & support | 2009 |
| British Soil (Western) Limited | Administrative & support | 1992 |
| British Soil Limited | Administrative & support | 1968 |
| British Vapour Testing Company Limited | Professional & scientific | 1945 |
| Britluxe Limited | Wholesale & retail | 2022 |
| Britmedical Limited | Health & social care | 2001 |
| Britnets Co Ltd | Construction | 2025 |
| Briton College of Arbitration and Legal Studies Ltd | Information & communication | 2025 |
| Britpark Properties Ltd | Construction | 2016 |
| Britreidi Limited | Water & waste | 2020 |
| Britsco Trading Group Limited | Wholesale & retail | 2019 |
| Britsell Limited Ltd | Wholesale & retail | 2023 |
| Brittons Holdings Limited | Other services | 1994 |
| Brittrade Global Ltd | Wholesale & retail | 2025 |
| Britway Court Limited | Households | 2006 |
| Britwell Ltd | Wholesale & retail | 2025 |
| Britwise Accounting Hub Ltd | Professional & scientific | 2023 |
| Brivelletex Ltd | Information & communication | 2026 |
| Brixtonhr Ltd | Administrative & support | 2021 |
| Brizy Ltd | Wholesale & retail | 2025 |
| Brkly Global Limited | Financial services | 2024 |
| Brmja Tech Ltd | Information & communication | 2024 |
| Brmp Ltd | Construction | 2015 |
| BRO Illtyd CYF. | Hospitality | 2022 |
| BRO Partnership Limited | Professional & scientific | 2016 |
| BRO Property Ltd | Real estate | 2016 |