| Bondcare (Rosewood) Limited | Administrative & support | 2019 |
| Bondcare 4 Limited | Health & social care | 2008 |
| Bondcare 5 Limited | Health & social care | 2008 |
| Bondcare 7 Limited | Health & social care | 2009 |
| Bondcare Hall Lane Limited | Administrative & support | 2011 |
| Bondcare Willington Limited | Administrative & support | 2011 |
| Bondi Blue Limited | Other services | 2019 |
| Bondi Technology Co., Ltd | Wholesale & retail | 2025 |
| Bondora Technology Limited | Information & communication | 2025 |
| Bondstone Ltd | Administrative & support | 2026 |
| Boneal Investments Ltd | Real estate | 2025 |
| Boneham Properties Ltd | Real estate | 2025 |
| Boni Project Management Limited | Professional & scientific | 2006 |
| Bonison Investment UK Ltd. | Wholesale & retail | 2025 |
| Bonita Care Ltd | Health & social care | 2022 |
| Bonjour for Tourism Ltd | Administrative & support | 2025 |
| Bonlave Ltd | Wholesale & retail | 2005 |
| Bonmarche Properties Limited | Real estate | 2021 |
| Bonmarche Stores Limited | Professional & scientific | 2021 |
| Bonmell Limited | Health & social care | 2014 |
| Bonnie Healthcare (UK) Limited | Health & social care | 2016 |
| Bonnies Cafe Munchies Limited | Hospitality | 2025 |
| Bonny Finley Accountancy Services Limited | Professional & scientific | 2020 |
| Bono & Build Limited | Real estate | 2026 |
| Bonora Ltd | Professional & scientific | 2009 |
| Bonsaii Enterprise Ltd | Real estate | 2023 |
| BONSTMOR123 Ltd | Wholesale & retail | 2026 |
| Bont Properties Ltd | Real estate | 2022 |
| Bontex UK Ltd | Wholesale & retail | 2025 |
| Bonu Cakes Ltd | Hospitality | 2019 |
| Bonus Ball UK Limited | Arts & recreation | 2026 |
| Bonya Ltd | Transport & logistics | 2018 |
| Bonzai AI UK Ltd | Information & communication | 2025 |
| BOO Brownies Ltd | Wholesale & retail | 2025 |
| BOO WHO Limited | Real estate | 2004 |
| Booboo TOT Limited | Wholesale & retail | 2019 |
| Booboo Trading Limited | Wholesale & retail | 2017 |
| Boocock & Dimou Ltd | Construction | 2021 |
| Boogy Fashion Limited | Wholesale & retail | 2025 |
| Boohoo Telecs Limited | Wholesale & retail | 2017 |
| Boohoo.Com UK Limited | Wholesale & retail | 2006 |
| Boohooman.Com UK Limited | Wholesale & retail | 2021 |
| Book Baba Ltd | Wholesale & retail | 2024 |
| Book Deal Limited | Other services | 2022 |
| Book With Style UK Limited | Administrative & support | 2020 |
| Book-Keeping & Accountancy Services (M/C) Ltd | Professional & scientific | 2011 |
| Bookedsyn Ltd | Professional & scientific | 2025 |
| Bookeper Ltd | Professional & scientific | 2025 |
| Bookfellers Limited | Other services | 2026 |
| Bookfolio Ltd | Information & communication | 2026 |
| Bookgrand Ltd | | 1984 |
| Bookhub Ltd | Wholesale & retail | 2024 |
| Booking Services International Limited | Other services | 1984 |
| Booking.Com Transport Limited | Administrative & support | 2004 |
| Books for Everyone | Education | 2019 |
| Books Nooks Ltd | Hospitality | 2025 |
| Bookshop Bartek & Szymon Limited | Wholesale & retail | 2025 |
| Booksion Limited | Wholesale & retail | 2026 |
| Bool Survey Insights Ltd | Information & communication | 2025 |
| Boom 2008 Ltd. | Real estate | 2016 |
| Booma Film Advertising Limited | Information & communication | 2024 |
| Boombae Ltd | Professional & scientific | 2019 |
| Boombiotics Ltd | Wholesale & retail | 2025 |
| Boomerang Communications Ltd | Professional & scientific | 2009 |
| Boomers and Swingers Limited | Arts & recreation | 2016 |
| Boomgoo Ltd | Wholesale & retail | 2026 |
| Boomvie Ltd | Information & communication | 2025 |
| Boon Army Limited | Arts & recreation | 2015 |
| Boon Payments Limited | Information & communication | 2023 |
| Boonda Inc Ltd | Information & communication | 2021 |
| Booni Consultancy Ltd | Professional & scientific | 2020 |
| Boorman Heating Ltd | Construction | 2016 |
| Boost + Learning Limited | Education | 2024 |
| Boost Asset Finance Ltd | Financial services | 2022 |
| Boost Boozy Ltd | Wholesale & retail | 2018 |
| Boost Box Prep Meals Ltd | Hospitality | 2019 |
| Boost Leads Ltd | Professional & scientific | 2019 |
| Boost PMO Services Ltd | Information & communication | 2025 |
| Boost Property Group Limited | Real estate | 2024 |
| Boost Wellness Co Ltd | Wholesale & retail | 2020 |
| Boostmediapros Ltd | Professional & scientific | 2022 |
| Boote Edgar Esterkin Limited | Professional & scientific | 2012 |
| Bootee Buddy Ltd | Wholesale & retail | 2021 |
| Booth & Howarth Limited | Wholesale & retail | 2001 |
| Booth & Sons Garden Specialists Ltd | Other services | 2022 |
| Booth Anaesthesia & Medical Services Ltd | Health & social care | 2017 |
| Booth Autos Limited | Wholesale & retail | 2003 |
| Booth Cloud IT Ltd | Information & communication | 2017 |
| Booth Construction NW Ltd | Construction | 2025 |
| Booth GAS Heating and Plumbing Limited | Construction | 2020 |
| Booth Plastering Ltd | Construction | 2025 |
| Booth ST Estates Ltd | Extraterritorial | 2016 |
| Booth's Electrical Contractors Limited | Construction | 2012 |
| Booth's Plumbing and Heating Services Limited | Construction | 2012 |
| Boothstown Dent Ltd | Health & social care | 2022 |
| Boothstown GIN Limited | Hospitality | 2019 |
| Boothstown Village Hall Association | Health & social care | 2012 |
| Bootle Development Limited | Real estate | 2024 |
| Bootstrap Company (Blackburn) Limited | Administrative & support | 1987 |
| Booze Express Manchester Limited | Wholesale & retail | 2022 |