| Bristolforms Ltd | Professional & scientific | 2024 |
| Bristolhaul Ltd | Transport & logistics | 2017 |
| Bristolian Properties Limited | Real estate | 2014 |
| Bristolify Limited | Households | 2023 |
| Bristolisopen Limited | Information & communication | 2014 |
| Bristolmade Limited | Other services | 2021 |
| Bristolmeats Limited | Manufacturing | 2025 |
| Bristolmgmt Ltd | Households | 2025 |
| Bristolology Bars Ltd | Hospitality | 2022 |
| Bristolology Ltd | Hospitality | 2021 |
| Bristolonline Limited | Wholesale & retail | 2026 |
| Bristolpipetoolscompany Ltd | Wholesale & retail | 2026 |
| Bristols Door Specialist Ltd | Administrative & support | 2020 |
| Bristoltechforge Ltd | Information & communication | 2025 |
| Bristow's Plumbing & Bathrooms Ltd | Construction | 2026 |
| Bristowe Consulting Limited | Professional & scientific | 2008 |
| Bristows Refurbishment Limited | Construction | 2019 |
| Bristronica Ltd | Wholesale & retail | 2018 |
| Brit Pro Global Solutions Ltd | Information & communication | 2024 |
| Britair Southwest Limited | Manufacturing | 2013 |
| Britana Limited | Professional & scientific | 2013 |
| Britanesia Property Investment and Rental Management Limited | Real estate | 2023 |
| Britannia Road Flats Limited | Households | 2021 |
| Britdna Ltd | Wholesale & retail | 2024 |
| Brite Little Buttons Ltd | Administrative & support | 2019 |
| Britfast Logistics Ltd | Transport & logistics | 2025 |
| Britguard Locksmiths Ltd | Other services | 2023 |
| Britian Connect Ltd | Wholesale & retail | 2025 |
| British Australian Marquees Limited | Administrative & support | 2006 |
| British Institute for Geological Conservation Limited | Professional & scientific | 1992 |
| British Neuroscience Association Limited | Other services | 2001 |
| British Roundnet Limited | Other services | 2020 |
| British Standard Association Limited | Professional & scientific | 1901 |
| British Tobacco Company Limited(The) | Professional & scientific | 1901 |
| Britons Services Ltd | Other services | 2024 |
| Britroute Trading Limited | Transport & logistics | 2026 |
| Brittlec Ltd | Construction | 2014 |
| Britton Transport (Bristol) Ltd | Transport & logistics | 2018 |
| Brittons Building Services Limited | Construction | 2018 |
| Briture Highland Media Limited | Administrative & support | 2023 |
| Brivan Steels Ltd | Construction | 2015 |
| Briz Kidz Casting Ltd | Other services | 2016 |
| Brizco Ltd | Professional & scientific | 2021 |
| Brizen Management Company (Leckhampton) Limited | Real estate | 2017 |
| Brizfit Limited | Arts & recreation | 2024 |
| Brizzle Born and Bread Limited | Hospitality | 2012 |
| Brizzle Bricks Ltd | Wholesale & retail | 2026 |
| Brizzy Exchange Limited | Wholesale & retail | 2026 |
| BRK Ujima Ltd | Professional & scientific | 2021 |
| BRL Trading Ltd | Professional & scientific | 2025 |
| BRM Professional Services Ltd | Transport & logistics | 2023 |
| Brmlogistics Ltd | Transport & logistics | 2021 |
| Brnovate Ltd | Information & communication | 2018 |
| BRO Autos Limited | Wholesale & retail | 2025 |
| Broad Haven House Management Limited | Hospitality | 1995 |
| Broad Plain House Community & Social Club Limited | Hospitality | 2025 |
| Broad Plain RFC Ltd | Hospitality | 2022 |
| Broad Quay Limited | Other services | 2004 |
| Broad Spectrum Communications Limited | Professional & scientific | 1989 |
| Broad Technologies Ltd | Construction | 2023 |
| Broad Walk Limited | Wholesale & retail | 2026 |
| Broadband Visual Communications Limited | Information & communication | 2002 |
| Broadberry Building Services Ltd | Construction | 2017 |
| Broadboost Limited | Real estate | 2002 |
| Broadcroft Consultants Ltd. | Energy | 2016 |
| Broadfield Projects Ltd | Construction | 2026 |
| Broadley Creative Limited | Administrative & support | 2016 |
| Broadoak Cider Company Limited | Manufacturing | 2007 |
| Broadpin UK Ltd | Information & communication | 2014 |
| Broadstarr Networks Limited | Wholesale & retail | 2000 |
| Broadwater Marine Solutions Limited | Professional & scientific | 2022 |
| Broadway (Bristol) Tools Limited | Manufacturing | 1958 |
| Broadway Avpe Limited | Manufacturing | 2021 |
| Broadway Engineering Limited | Manufacturing | 1945 |
| Broadway GET Limited | Manufacturing | 1997 |
| Broadway Group Holdings Limited | Financial services | 2024 |
| Broadway Initiative Ltd | Other services | 2022 |
| Broadway London Investment Limited | Real estate | 2022 |
| Broadway London Limited | Real estate | 2021 |
| Broadway Properties Limited | Real estate | 1986 |
| Broadway UK Holdings Ltd | Real estate | 2025 |
| Brock and Houlford LLP | | 2017 |
| Brockhill Creative Limited | Administrative & support | 2024 |
| Brockley & Cleeve Woodlands Ltd | Agriculture & fishing | 2019 |
| Brockley Building Conservation Limited | Wholesale & retail | 2002 |
| Brockley Woodland Limited | Extraterritorial | 2011 |
| Brockman Accountants Ltd | Professional & scientific | 2021 |
| Brod Productions Ltd | Information & communication | 2012 |
| Brodersen Partners Limited | Professional & scientific | 2020 |
| Brodie Energy Consultants Ltd | Administrative & support | 2012 |
| Broke Bones Limited | Wholesale & retail | 2024 |
| Broken Bando Limited | Wholesale & retail | 2019 |
| Brola Developments Limited | Construction | 2024 |
| Brollywood Films Ltd | Information & communication | 2009 |
| Bromley Farm Management Limited | Households | 2005 |
| Brompton Estate Ltd | Real estate | 2005 |
| Brompton Homes Limited | Extraterritorial | 2022 |
| Brompton Newport Ltd | Real estate | 2024 |
| Brompton Place 2 Limited | Real estate | 2025 |
| Brompton Place Limited | Real estate | 2024 |