| Brintor Group Limited | Newton Abbot | 1999 |
| Brio Healthcare Limited | Coventry | 2026 |
| Brio Physio Limited | London | 2023 |
| Brio Properties Limited | Belfast | 2021 |
| Brioni Capital Ltd | London | 2021 |
| Brionnais Holding Ltd | London | 2021 |
| Brions Ltd | Aylesbury | 2024 |
| Brip 10 SPV Ltd | Towcester | 2025 |
| BRIP0918 (DBC2) Limited | Towcester | 2021 |
| Brippo Limited | London | 2022 |
| Briro Properties Limited | Huddersfield | 2025 |
| Brisc Ltd | Cardiff | 2022 |
| Brisco Security Ltd | Burton-On-Trent | 2025 |
| Brisco Williams (Shareholder) Limited | Swansea | 2024 |
| Briscoe Investment Group Ltd | Cardiff | 2019 |
| Brisk Transfair Ltd | London | 2020 |
| Brisland Holdings Limited | Harrow | 2023 |
| Brislington Europe Limited | Severn Beach | 2025 |
| Brislington Holdco Limited | Severn Beach | 2024 |
| Brisq Group Limited | Bury St. Edmunds | 2025 |
| Brissco Limited | Bristol | 2016 |
| Brissoni Group & Partners Ltd | London | 2018 |
| Bristles & Keys Holdings Limited | London | 2021 |
| Bristol & Abbot Limited | Bristol | 2020 |
| Bristol & Avon Group Limited | Maidenhead | 2020 |
| Bristol & Bath Regional Capital CIC | Bristol | 2015 |
| Bristol & West Investments PLC | London | 1982 |
| Bristol & West PLC | London | 1987 |
| Bristol Automotive Group Limited | London | 2011 |
| Bristol Beer Factory Limited | Bristol | 2022 |
| Bristol Bidco Limited | Altrincham | 2019 |
| Bristol Business Brokers Limited | Bristol | 2018 |
| Bristol Dragons Group Ltd | Bristol | 2026 |
| Bristol Funeral Directors Limited | Southville | 1988 |
| Bristol Highway Group Limited | Bristol | 2022 |
| Bristol Holding Limited | Bristol | 2015 |
| Bristol Impressionist Limited | Wimborne | 2022 |
| Bristol Insure Limited | Bristol | 2022 |
| Bristol Manufacturing Limited | Brentwood | 2012 |
| Bristol Oak Ltd | London | 2024 |
| Bristol Pensions Management Limited | Bristol | 2000 |
| Bristol Private Equity Limited | Fowey | 2016 |
| Bristol Pullman Ltd | London | 2020 |
| Bristol Rose Commercial Limited | Bristol | 2025 |
| Bristol Rose Mortgages Ltd | Bristol | 2024 |
| Bristol Schools (Holdings) Limited | Stepps | 2004 |
| Bristol Strategic NO1 Limited | London | 2023 |
| Bristol Water Holdings Limited | Bristol | 1991 |
| Bristol Water Holdings UK Limited | Bristol | 2003 |
| Bristol York Holdings Ltd | Banbury | 2023 |
| Bristol York Limited | Oxfordshire | 2004 |
| Bristolls Limited | London | 2019 |
| Bristow & Co (UK) Limited | Grimsby | 2018 |
| Bristow & Sutor Management Services Limited | Redditch | 2017 |
| Bristow Associates Group Holdings Ltd | Eastleigh | 2026 |
| Bristow Staff Pension Scheme Trustees Limited | Surrey | 1991 |
| Brit Business Funding Limited | London | 2020 |
| Brit Capital Ltd | London | 2020 |
| Brit FX Limited | Manchester | 2019 |
| Brit Group Finance Limited | London | 2007 |
| Brit Group Holdings Limited | London | 2024 |
| Brit I Group Ltd | Wickford | 2020 |
| Brit Insurance Holdings Limited | London | 1995 |
| Brit Insurance Services Limited | London | 1986 |
| Brit Life Ltd | Taunton | 2026 |
| Brit Nexus Limited | Wolverhampton | 2018 |
| Brit Renewables Limited | Derby | 2019 |
| Brit Syndicates Limited | London | 1964 |
| Brit Syndicates Trustee Limited | London | 2021 |
| Brit UK Holdings Ltd | Salisbury | 2025 |
| Brit UW Limited | London | 1996 |
| Brita Finish Holdings Limited | Coventry | 2023 |
| Britair Holdings Limited | Harmondsworth | 1998 |
| Britaly Ventures Ltd | Altrincham | 2016 |
| Britannia Apac Holding Limited | London | 2021 |
| Britannia Arms Group Limited | London | 2023 |
| Britannia Broker Services Ltd | Christchurch | 2026 |
| Britannia Capital Investments Holdings Limited | Cardiff | 2024 |
| Britannia Capital Management Ltd | London | 2014 |
| Britannia Commercial Brokers Ltd | Swansea | 2015 |
| Britannia Data Management Limited | Lutterworth | 1981 |
| Britannia Developments Ltd | Manchester | 2021 |
| Britannia Digital Assets Limited | London | 2022 |
| Britannia Finance & Capital Ltd | Kington | 2025 |
| Britannia Financial (UK) Limited | Livingston | 2012 |
| Britannia Financial Services Limited | Wolverhampton | 2018 |
| Britannia Financial Telepathy Ltd | London | 2026 |
| Britannia Global Investments Limited | London | 2015 |
| Britannia Global Markets Limited | London | 1985 |
| Britannia Global Markets Nominees Limited | London | 2019 |
| Britannia Group Developments Limited | Manchester | 2024 |
| Britannia Group Holdings Limited | Manchester | 2021 |
| Britannia Group Investments Ltd | Manchester | 2021 |
| Britannia Guide Limited | Bury St. Edmunds | 2023 |
| Britannia Investment Corp Limited | London | 2019 |
| Britannia Investments (Southern) Ltd | Fareham | 2015 |
| Britannia Mortgages Ltd | Emsworth | 2022 |
| Britannia Parking Group Limited | Bournemouth | 2012 |
| Britannia Pension Trustees Limited | Manchester | 2010 |
| Britannia Research Ltd | Horsham | 2022 |