| Bodypak Group Ltd | Diss | 2021 |
| Bodytonic Clinic Group Limited | London | 2021 |
| Bodyworks West Limited | London | 2007 |
| Boee Holdings Limited | Stoke-On-Trent | 2023 |
| Boei Limited | Newcastle Upon Tyne | 2021 |
| Boeing Distribution Services I Limited | London | 2014 |
| Boekestyn Holdings Ltd | Peterborough | 2019 |
| Boerde-Consult Ltd | Hounslow / Greater London | 2016 |
| Boey Group Ltd | Northwich | 2024 |
| Bofam Ltd | Plymouth | 2018 |
| Boff (U) Qualifying Asset Holding Company Limited | London | 2024 |
| Boffin Finance Limited | Hornchurch | 2021 |
| Boffin Life Ltd | St. Albans | 2023 |
| Bofort Ltd | Brighton | 2009 |
| BOG Standard Holding Ltd | Dudley | 2024 |
| Bogeish Limited | London | 2020 |
| Bogle Mortgages Ltd | Cheltenham | 2021 |
| Bogt Ltd | London | 2022 |
| BOH Investments Ltd | Liverpool | 2026 |
| BOH South Limited | Bridgwater | 2025 |
| Bohannan Holdings Ltd | Ipswich | 2018 |
| Bohdan Holdings Ltd | Wisbech | 2020 |
| Bohemia Holding Company UK Limited | London | 2021 |
| Bohemia Invest One Ltd | Camberley | 2022 |
| Bohemond Enterprises Ltd | London | 2020 |
| Bohm Capital Limited | Mildenhall | 2022 |
| Boho Club Ltd | Reading | 2015 |
| BOI (UK) Pensions Trustees Limited | Bristol | 1965 |
| Boikoff Group Holding Limited | London | 2025 |
| Boiled EGG Limited | London | 2024 |
| Boiler Assist Ltd | Billericay | 2025 |
| Boiler for Life Limited | Tankersley | 2012 |
| Boiler Genie Holdings Ltd | Glasgow | 2022 |
| Boiler Protect Limited | Pool | 2022 |
| Boiler Shop Holdings Limited | Chesterfield | 2025 |
| Boilers on Finance Limited | Dundee | 2012 |
| Boilertec Hire Holdings Ltd | Cheadle | 2022 |
| Boim Holdings Limited | London | 2019 |
| Boisere Holdings Limited | Leigh-On-Sea | 2025 |
| Boitefin Limited | London | 2018 |
| Boja (Holdings) Limited | Sheffield | 2019 |
| Boka Capital Ltd | London | 2024 |
| Bokaldo Group Limited | London | 2022 |
| Bokella Limited | Wareham | 2020 |
| Bokes Ltd | London | 2021 |
| Bokhara Investments Limited | King'S Lynn | 2024 |
| Bokhari Finance Limited | Dagenham | 2021 |
| Bokpay Ltd | London | 2025 |
| Boks Holdings Limited | Peterborough | 2016 |
| Boku Account Services UK Ltd | London | 2007 |
| Bola Funding Limited | London | 2026 |
| Bola Group Limited | Chester | 2022 |
| Bolamrose Limited | London | 2006 |
| Bolan Properties Ltd | Calne | 2021 |
| Bolax UK Limited | Liverpool | 2017 |
| Bolba Limited | Manchester | 2025 |
| Bold & Wise Group Limited | Peterborough | 2023 |
| Bold Capital (Private) Limited | Blackpool | 2022 |
| Bold Capital Limited | London | 2025 |
| Bold Flairr Media Group Limited | London | 2025 |
| Bold Holdings Limited | Liverpool | 2021 |
| Bold International Properties Holdings Limited | Liverpool | 2021 |
| Bold Money Limited | London | 2022 |
| Bold Partners Ltd | Burton-On-Trent | 2024 |
| Bold Projects Group Limited | Stratford-Upon-Avon | 2023 |
| Bold Properties Limited | London | 2017 |
| Bold Systems Limited | London | 2020 |
| Bold Venture Holdings | Ballymoney | 2020 |
| Bold Ventures Holdings Limited | Northwich | 2021 |
| Bold-Stone Consult Limited | Birmingham | 2023 |
| Boldascend Financial Services Limited | Romford | 2025 |
| Bolder Holder Ltd | London | 2024 |
| Boldgate Advisory Limited | London | 2021 |
| Boldhaven Management Services Limited | London | 2017 |
| Boldoak Partners Limited | Worthing | 2024 |
| Boldyn Networks Europe Finance Limited | London | 2024 |
| Bole Investments 1 Limited | Belfast | 2025 |
| Bole Investments 2 Limited | Belfast | 2025 |
| Bole Ltd | Charvil | 2019 |
| Bolebec Limited | London | 2024 |
| Boler Wiseman Financial Services Limited | Birmingham | 2001 |
| Bolero Holdings (UK) Limited | Isleworth | 2019 |
| Bolesworth Investment Company Limited | Chester | 2017 |
| Boleyn Assets Limited | Ashford | 2010 |
| Boleyn Holdings Ltd | London | 2018 |
| Boleyn Underwriting Limited | London | 2013 |
| Boliem Ltd | Nottingham | 2021 |
| Bolight International Ltd | London | 2018 |
| Bolilla Investments Limited | London | 2012 |
| Bolina Limited | Uxbridge | 2020 |
| Bolingbroke Group Ltd | Swindon | 2026 |
| Bolingbroke Limited | London | 2005 |
| Bolingbroke Patterson Ltd | Swindon | 2021 |
| Bolistrom Limited | Guildford | 1993 |
| Bolitho Holdings (UK) Ltd | London | 2026 |
| Bolitho Limited | London | 1998 |
| Bolland Holdings Ltd | Littlehampton | 2022 |
| Bolland Investments Limited | Manchester | 2018 |
| Bolland UK Group Holdings Limited | Clitheroe | 2025 |
| Bollens Capital Ltd | Kington | 2025 |