| Boscawen Street Limited | Worcester | 2020 |
| Bosch Glucksburg Perry Investments Limited | Dartford | 2012 |
| Bosco Cody Limited | London | 2017 |
| Bosco Group Holdings Ltd | Lauder | 2025 |
| Bosco Holdings Ltd | Leeds | 2019 |
| Boscobel Holdings Limited | Ormskirk | 2025 |
| Boscombe Capital Ltd | Great Missenden | 2017 |
| Boseco Limited | West Midlands | 2007 |
| Bosfin Limited | Leatherhead | 2018 |
| Bosh UK Holdings Limited | London | 2024 |
| Bosham Capital Advisors Ltd | Colchester | 2015 |
| Bosham Dental Holdings Limited | Bosham | 2024 |
| Boshers Ltd | Taunton | 1994 |
| Bosheydhlann Ltd | Newquay | 2016 |
| Boshhh Europe Limited | Manchester | 2024 |
| Boshhh Financial Services Limited | Manchester | 2024 |
| Boshhh Fintech Ltd | Manchester | 2024 |
| Boshhh Group Limited | Manchester | 2025 |
| Boshhh Moneyapp Limited | Manchester | 2024 |
| Boshkini Investments Limited | London | 2024 |
| Bosio Group Holding Ltd | Hull | 2026 |
| Bosl (Holdings) Limited | Rochester | 2024 |
| Bosphorus Holding Ltd | London | 2019 |
| Bosphorus Trade Ltd | Barry | 2026 |
| Bosporus Holdings Limited | Norwich | 2023 |
| Boss & Co Holding Limited | London | 2015 |
| Boss Asset Finance Ltd | Stamford | 2018 |
| Boss Capital Ltd | London | 2024 |
| Boss Controls Group Limited | Horsham | 2020 |
| Boss Direct Holdings Limited | Manchester | 2025 |
| Boss Funeral Holdings Limited | Birmingham | 2016 |
| Boss Group Holdings GB Ltd | Bolton | 2021 |
| Boss Group Holdings Limited | Heskin | 2015 |
| Boss Group Lincoln Ltd | Lincoln | 2017 |
| Boss Holdings (Leicester) Limited | Leicester | 2021 |
| Boss Mate Limited | London | 2014 |
| Boss PIG Ltd | Birmingham | 2016 |
| Boss Praa Limited | Helston | 2020 |
| Boss Risk Solutions Ltd | Lichfield | 2021 |
| Bossa Investments Ltd | Ammanford | 2020 |
| Bosse Systems Ltd | Hook | 2025 |
| Bossenden Holdings Limited | Faversham | 2021 |
| Bost Group Ltd | St. Ives | 2024 |
| Bostall Group Limited | Leicester | 2019 |
| Bostan Group Limited | Birmingham | 2023 |
| Boston & Linchpin Developments Ltd | Bathgate | 2023 |
| Boston and Alexander Solutions Limited | Purley | 2025 |
| Boston Capital Finance Ltd | Marlow | 2023 |
| Boston Capital Management (UK) Limited | London | 2007 |
| Boston Capital Service (BCS) Ltd | London | 2019 |
| Boston Common Ltd | London | 2026 |
| Boston Direct Management UK Ltd | Lincoln | 2005 |
| Boston Fidelity Corporation Limited | Reading | 2003 |
| Boston Financial Planning Limited | Boston | 2004 |
| Boston Harper (London) Ltd | London | 2011 |
| Boston Holdco a Limited | Bolton | 2013 |
| Boston Insurance Brokers Limited | Leeds | 1994 |
| Boston Insurance Services Ltd | Boston | 2016 |
| Boston Interiors Holdings Limited | Newcastle-Under-Lyme | 2015 |
| Boston International Holdings PLC | London | 2015 |
| Boston Investco Limited | Northamptonshire | 2025 |
| Boston Investment Management Group Limited | Beaconsfield | 1971 |
| Boston Nominees Limited | Beaconsfield | 1999 |
| Boston Partners (UK) Limited | London | 2014 |
| Boston Prime Limited | London | 2010 |
| Boston Spa Investments Limited | Harrogate | 2019 |
| Boston UK Holdings Limited | Biggleswade | 2022 |
| Boston United Holding Company Limited | Langworth | 2008 |
| Boston Wealth Management Ltd | Wirral | 2012 |
| Boston West (Holdings) Limited | Sale | 2012 |
| Boswell Enterprises Ltd | Fairford | 2023 |
| Boswell Group Holdings Ltd | Stanstead Abbotts | 2023 |
| Boswells Group Limited | Didcot | 2024 |
| Bosworth Holding Coventry Ltd | Coventry | 2026 |
| Bosworth Leasing Limited | Market Harborough | 1999 |
| Bosworth Newco 1 Limited | Birmingham | 2025 |
| Bosworth Newco 2 Limited | Birmingham | 2025 |
| Bosworth Wealth Management Limited | Leicester | 2018 |
| BOT Market Ltd | Ilford | 2025 |
| Botan Holdings Ltd | London | 2024 |
| Botanical Investments Limited | London | 2019 |
| Botanical Water Technologies IP Ltd | London | 2020 |
| Botany Bay Asset Management Limited | Chorley | 2023 |
| Both Capital Ltd | London | 2026 |
| Both Yield Investment & Trading Ltd | Par | 2013 |
| Botham Capital Limited | Nottingham | 2023 |
| Botham Holdings Limited | Nottingham | 2025 |
| Botham's Group Ltd | Whitby | 2023 |
| Botheras (2014) Ltd | Stoke-On-Trent | 2014 |
| Bothwell Bridge Associates Ltd | Uddingston | 2006 |
| Bothwick Finance Ltd | Bedford | 2020 |
| Bothy Dbph Limited | Dundee | 2023 |
| Botley Bess Ltd | Yeovil | 2022 |
| Botley Developments (Holdings) Limited | London | 2017 |
| Botley Roofing Group Limited | Romsey | 2025 |
| Boto Hedge Limited | London | 2026 |
| Botolph Wealth Management Limited | Peterborough | 2013 |
| Botoptions (UK) PLC | London | 2015 |
| Botson Manor Group Limited | London | 2026 |
| Botswana Tech Ltd | Alton | 2025 |