| Bstp Financial Services Limited | Barnsley | 2024 |
| BSU Arkle Bidco Ltd | London | 2025 |
| BSU Broking Ltd | Ongar | 2023 |
| BSU Holdings Ltd | Leeds | 2025 |
| BSU Nova Bidco Ltd | London | 2024 |
| BSU Nova Midco Ltd | London | 2024 |
| Bsure Holdings Ltd | Tunbridge Wells | 2024 |
| BSV Group Holdings Limited | Stockport | 2025 |
| BSV Holdings Ltd | London | 2022 |
| BSV Management Services Limited | Leicester | 2023 |
| BSW Capital Ltd | London | 2017 |
| BSW Group Holdings Ltd | Cowbridge | 2025 |
| BSW Investments Ltd | Dunfermline | 2020 |
| BSW London Ltd | London | 2018 |
| Bszi Limited | Llanelli | 2019 |
| BT (International) Holdings Limited | London | 1988 |
| BT Advice Group Ltd | Ripley | 2026 |
| BT Avanta Limited | London | 2025 |
| BT Corporate Limited | Glasgow | 2021 |
| BT European Investments Limited | London | 2001 |
| BT Exchange Ltd | London | 2026 |
| BT Fifty-One | London | 1998 |
| BT Fifty-Three Limited | London | 1998 |
| BT Globenet Nominees Limited | London | 1987 |
| BT Groundworks Limited | Saltburn-By-The-Sea | 2025 |
| BT Holdings Limited | London | 1988 |
| BT Lindell Contracting Ltd | Cowbridge | 2023 |
| BT Momentum Bidco Limited | London | 2026 |
| BT Momentum Midco Limited | London | 2026 |
| BT Momentum Topco Limited | London | 2026 |
| BT Mortgages Limited | Kings Langley | 2021 |
| BT Pattenden Holdings Limited | Brighton | 2024 |
| BT Pension Scheme Management Limited | London | 2004 |
| BT Pension Scheme Trustees Limited | London | 2006 |
| BT SLE Euro Limited | London | 2011 |
| BT SLE USD Limited | London | 2011 |
| BT Tradeco Ltd | Wembley | 2020 |
| BT2024 Limited | Cheam | 2024 |
| BTB Contracting Ltd | Fareham | 2020 |
| BTB Estates Holdings Limited | Bolton | 2015 |
| BTB International Investments Ltd | London | 2022 |
| BTC Angels Share Ltd | Edinburgh | 2022 |
| BTC Hodlings Limited | Leicester | 2021 |
| BTC Lendco 1 UK Limited | London | 2024 |
| BTC Sure Group Limited | London | 2012 |
| BTC Venture Capital Ltd | Glasgow | 2021 |
| Btcdana Global Trading Ltd | London | 2024 |
| Btcmining Limited | Cardiff | 2024 |
| Btcs Nominees Limited | Hexham | 2007 |
| BTD Accountancy Ltd | London | 2019 |
| BTD Financial Advice Ltd | Fareham | 2025 |
| BTE Holdings Limited | Leicester | 2018 |
| BTE Skenesom Limited | Cambridge | 2025 |
| Btear Topco Limited | London | 2025 |
| Btec Holdings Limited | Edinburgh | 2021 |
| BTF Holdings Ltd | Brighton | 2017 |
| BTG Eddisons Group Limited | Manchester | 2008 |
| BTG Licenceco Limited | London | 2020 |
| BTG Pactual (UK) Limited | London | 2019 |
| BTG Pactual UK Financial Holding Ltd. | London | 2025 |
| BTG Pactual UK Holdco Limited | London | 2015 |
| BTG Services Ltd | Bolton | 2024 |
| Btgm Group Limited | Bolton | 2021 |
| Btgp-Bsi Limited | London | 2015 |
| BTH Group Ltd | Welling | 2019 |
| BTH Ventures Ltd | St. Helens | 2026 |
| BTI Group Limited | Telford | 2022 |
| Btiei Limited | Glasgow | 2020 |
| Btig Limited | London | 2007 |
| BTJ Mortgages Ltd | Romford | 2015 |
| Btjc Ltd | Chesterfield | 2020 |
| BTK Enterprises Ltd | Oldham | 2023 |
| BTK Mortgage Services Ltd | Sutton | 2024 |
| BTK Stoves Ltd | Bury St Edmunds | 2026 |
| BTL Bridging Limited | Manchester | 2024 |
| BTL Cover Limited | Manchester | 2024 |
| BTL Ecosystem Limited | London | 2025 |
| BTL Enterprises Limited | Stevenage | 2013 |
| BTL Family Company Limited | Marlow | 2011 |
| BTL Finance Limited | Manchester | 2024 |
| BTL Holdings Kent Limited | Longfield | 2026 |
| BTL Mortgages Scotland Ltd | Edinburgh | 2022 |
| BTL NO.3 Ltd | London | 2022 |
| BTL Portfolio Finance Ltd | Llandysul | 2026 |
| BTL Property-Uk Holding Limited | Ashford | 2023 |
| BTM FIC Limited | Maidenhead | 2025 |
| BTM Finance Limited | Edinburgh | 2021 |
| Btme Holdings Limited | Telford | 2021 |
| Btmk Financial Services Limited | Basildon | 2024 |
| Btmr Holdings Limited | Manchester | 2026 |
| BTN Group Limited | Finedon | 2022 |
| BTN Holdings Limited | Bolton | 2025 |
| Btomorrow Ventures Limited | London | 2019 |
| Bton Financial Limited | London | 2017 |
| Btonbiz Ltd | Brighton | 2022 |
| Btor Management Limited | Nottingham | 2020 |
| BTP First Limited | Rochester | 2019 |
| BTP Group Holdings Limited | London | 2024 |
| BTP Holdings Limited | Stockport | 2015 |
| Btpc Holdings Limited | Coventry | 2022 |