| Brantham Court Investments Limited | Mildenhall | 2025 |
| Brantingham Holdings Limited | Brough | 2021 |
| Branton Capital Limited | London | 2011 |
| Brantones Holdings Limited | Liverpool | 2024 |
| Brants Bridge 2022-1 Holdings Limited | London | 2022 |
| Brants Bridge 2022-1 PLC | London | 2022 |
| Brants Bridge 2023-1 Holdings Limited | London | 2023 |
| Brants Bridge 2023-1 PLC | London | 2023 |
| Brantwood Finance 1 Ltd | London | 2025 |
| Brantwood Holdings (Cumbria) Ltd | Carlisle | 2022 |
| Branwell HC Limited | Leeds | 2021 |
| Branzell (Holdings) Limited | Bridgend | 2023 |
| Brar Capital Ltd | Bury St. Edmunds | 2025 |
| Brar Investments (NW) Ltd | Preston | 2023 |
| Braschem Commodities and Energy UK Limited | Wembley | 2024 |
| Brashfield Investments Limited | Portsmouth | 2020 |
| Brashlan Limited | Reading | 2018 |
| Brasien Management Limited | Canary Wharf | 2021 |
| Brasii Holdings 1 Limited | Arundel | 2022 |
| Brasil Warrant UK Limited | London | 2023 |
| Brasilis Capital Ltd | London | 2025 |
| Brask and Cece Holdings Limited | Sheffield | 2013 |
| Brass Cat (Yorkshire) Limited | Leeds | 2023 |
| Brassel Ltd | London | 2017 |
| Brasses Ltd | Paisley | 2025 |
| Brassic Ltd | Eastbourne | 2022 |
| Brassington Equity Group Ltd | London | 2026 |
| Brassington Group Limited | Manchester | 2024 |
| Brasted Holdings Limited | Wimbledon | 2026 |
| Brasted Investments (Anerley) Limited | Wimbledon | 2025 |
| Brat (Holdings) Ltd | Theydon Bois | 2011 |
| Brat Grandchildren Ltd | Theydon Bois | 2016 |
| Brathay Investments Limited | Windermere | 2021 |
| Bratt's Agri Services Ltd | Sutton-In-Ashfield | 2023 |
| Brattle Investments Limited | Harrow | 2022 |
| Braude Wealth Management Limited | Harrow | 2013 |
| Braun Capital Limited | London | 2018 |
| Brava Hospitality Group Limited | London | 2021 |
| Brava Investments Limited | Walton-On-Thames | 2025 |
| Brave Dryline Ltd | London | 2021 |
| Brave Organisation Limited | Winchester | 2022 |
| Braveheart Investment Group Limited | Glasgow | 1988 |
| Braveheart Risk Ltd | London | 2024 |
| Braventure Holdings Ltd | Luton | 2024 |
| Braver Investment Group Limited | Uxbridge | 2020 |
| Braver Property Group Limited | Uxbridge | 2022 |
| Braveson Holding Ltd | Waltham Cross | 2022 |
| Bravestar Financial Ltd | Glasgow | 2023 |
| Bravion Capital Limited | Southampton | 2025 |
| Bravissimo Group Limited | Northamptonshire | 2017 |
| Bravo (Drinks) Limited | Edinburgh | 2020 |
| Bravo French Investment & Wealth Limited | Norwich | 2013 |
| Bravo Investment Holdings 2 Limited | Harrogate | 2016 |
| Bravo Investment Holdings 3 Limited | Harrogate | 2016 |
| Bravo Investment Holdings Limited | Harrogate | 2016 |
| Bravo Realty Group Ltd | March | 2025 |
| Bravo Tango Limited | Wells | 2025 |
| Bravo UK Holdco Limited | London | 2019 |
| Bravo UK Holdings Ltd | London | 2016 |
| Bravo UK SPV Limited | London | 2019 |
| Bravreya Hendalg Ltd | Rochdale | 2026 |
| Bravura Group Holdings Ltd | London | 2026 |
| Bravura Holdings Ltd | Cardiff | 2024 |
| Brawdia Limited | London Heathrow | 2008 |
| Braxfield Financial Services Ltd | Lanark | 2014 |
| Braxton Gould Holdings Ltd | Ruislip, | 2025 |
| Bray Estates Group Holdings Limited | Dorking | 2023 |
| Bray Estates Holdings Limited | Dorking | 2023 |
| Bray Finance Limited | Cheltenham | 2024 |
| Bray Financial Limited | Bromley | 2002 |
| Bray Group Holdings Limited | Salisbury | 2025 |
| Bray Holdco Limited | Cheltenham | 2024 |
| Bray Holdings Limited | Preston | 2025 |
| Bray Midco Limited | Cheltenham | 2024 |
| Bray Reach Wealth Management Limited | Henley-On-Thames | 2013 |
| Braycote Holdings Limited | Rickmansworth | 2023 |
| Braycourt Sixteen Ltd | Cheam | 2026 |
| Braymad Limited | Bedford | 2021 |
| Braymont Asset Group Limited | East Ham | 2025 |
| Brayne & Price Holdings Limited | Birmingham | 2021 |
| Brayrock Holdings Limited | Kington | 2024 |
| Brayrock Investments Limited | Kington | 2025 |
| Braywhite Asset Management Limited | Solihull | 2018 |
| Braywhite Holdings Limited | Solihull | 2019 |
| Braywoodside Holdings Ltd | Maidenhead | 2025 |
| Brazauk Ltd | London | 2007 |
| Brazen (EOT) Limited | Manchester | 2024 |
| Brazenose Group Ltd | Peterborough | 2019 |
| Brazil & Co Holdings Ltd | Penarth | 2025 |
| Brazil 1 Limited | | 2003 |
| Brazil Funding Ltd | London | 2009 |
| Brazilian Holdings Limited | Basingstoke | 1950 |
| Brazilian Properties Limited | Basingstoke | 2003 |
| Brazilianhelp Ltd | London | 2024 |
| BRB Capital Management Limited | London | 2016 |
| BRB of Amfeix London Limited | London | 2019 |
| BRB Wealth Management Limited | Newcastle-Under-Lyme | 1986 |
| BRC Holding Group Limited | Chatham | 2023 |
| BRC Holdings Ltd | Bristol | 2017 |
| BRC Investments Ltd | Manchester | 2025 |