| Bofad Ventures Ltd | Health & social care | 2012 |
| Bogan Transport Limited | Transport & logistics | 2018 |
| Bogdan Feher Ltd | Wholesale & retail | 2017 |
| Bogoma Heathcare Ltd | Health & social care | 2023 |
| Bogsim Ltd | Transport & logistics | 2023 |
| Bogvic Ltd | Real estate | 2025 |
| Boiler Boost Ltd | Construction | 2022 |
| Boiler Fusion Limited | Construction | 2011 |
| Boiler Guard Midlands Limited | Construction | 2023 |
| Boiler Plumbing Installations Ltd | Construction | 2022 |
| Boiler Spares Centre (Leic) Ltd | Wholesale & retail | 2022 |
| Boka Limited | Wholesale & retail | 2025 |
| Bokhiria Homes Ltd | Health & social care | 2024 |
| Bokhiria Investments Limited | Real estate | 2025 |
| Bokhiria Properties Ltd | Real estate | 2024 |
| Bokken Boxing Ltd | Arts & recreation | 2025 |
| Bold Crest Ltd | Wholesale & retail | 2026 |
| Bold Spaces Interiors Limited | Wholesale & retail | 2021 |
| Boldgrayn Ltd | Professional & scientific | 2025 |
| Boldmere Properties Limited | Real estate | 2016 |
| Bolia Consultancy Services Ltd | Health & social care | 2012 |
| Bolley Management Limited | Professional & scientific | 2019 |
| Bolley Pubs Limited | Hospitality | 2018 |
| Bollin Stone Company Limited | Construction | 1955 |
| Bollyarkk Dance Ltd | Arts & recreation | 2023 |
| Bollywood Boys Club Ltd | Wholesale & retail | 2025 |
| Bolsover Optical Limited | Manufacturing | 2022 |
| Bolt and Beam Trades Limited | Construction | 2025 |
| Bolventor Ltd | Transport & logistics | 2015 |
| Bombay Biryani Limited | Hospitality | 2024 |
| Bombay Biryanii Limited | Hospitality | 2025 |
| Bombay Bistro Ltd | Hospitality | 2024 |
| Bombay Bites Bite Ltd | Hospitality | 2024 |
| Bombay Bites Lesta Ltd | Hospitality | 2025 |
| Bombay Bites Limited | Hospitality | 2022 |
| Bombay Kebab Biryani House Ltd | Hospitality | 2024 |
| Bombay Street Food Leicester Ltd | Hospitality | 2025 |
| Bombayfusion Ltd | Hospitality | 2025 |
| Bometrics Limited | Professional & scientific | 2022 |
| Bomi Group Ltd | Real estate | 2015 |
| Bomiro Ltd | Transport & logistics | 2020 |
| Bonanza Enterprises Limited | Real estate | 2017 |
| Bonar Rotaform Limited | Professional & scientific | 1979 |
| Bonar Silver Limited | Professional & scientific | 1980 |
| Bond Adam Limited | Professional & scientific | 2007 |
| Bond Adams LLP | | 2007 |
| Bond Legal Investments Limited | Real estate | 2025 |
| Bond Legal Limited | Professional & scientific | 2018 |
| Bond Marketing Ltd | Professional & scientific | 2025 |
| Bond Street Nursery School Limited | Education | 2025 |
| Bond Transport Ltd | Transport & logistics | 2026 |
| Bondus Ltd | Information & communication | 2022 |
| Bongo Flavours Ltd | Hospitality | 2021 |
| Bongo Flavourz Limited | Hospitality | 2020 |
| Bongo Limited | Other services | 2017 |
| Bonham Developers Limited | Real estate | 2018 |
| Bonham Estates Ltd | Real estate | 2018 |
| Bonham Real Estate Ltd | Real estate | 2016 |
| Bonito Solutions Limited | Administrative & support | 2025 |
| Bonjour Properties Limited | Real estate | 2021 |
| Bonney Care Agency Ltd | Health & social care | 2014 |
| Bonney & Associates Housing Solutions Ltd | Hospitality | 2013 |
| Bonney Fish & Chips Limited | Hospitality | 2023 |
| Bonnie Business Ltd | Professional & scientific | 2023 |
| Bonnie Hotel Limited | Hospitality | 2024 |
| Bonningate Ltd | Transport & logistics | 2015 |
| Bono London Limited | Hospitality | 2019 |
| Bonumtek Ltd | Other services | 2025 |
| Bonza ZEN Limited | Professional & scientific | 2006 |
| BOO Furniture Limited | Wholesale & retail | 2019 |
| Booboos Fashion Ltd | Manufacturing | 2020 |
| Book My Cart Ltd | Wholesale & retail | 2026 |
| Book of Torah Jewish Food London Ltd | Hospitality | 2019 |
| Booker FIC Ltd | Real estate | 2020 |
| Booking Whizz Limited | Information & communication | 2012 |
| Bookish App Limited | Other services | 2023 |
| Bookkeeping Services (Leicester) Ltd | Professional & scientific | 2008 |
| Books 2 Door Limited | Wholesale & retail | 2004 |
| Books Wise Publications Limited | Information & communication | 2011 |
| Boom Boom Sports Management Limited | Wholesale & retail | 2018 |
| Boom Box Vape Ltd | Wholesale & retail | 2024 |
| Boom Property Group Ltd | Real estate | 2021 |
| Boom TCG Ltd | Wholesale & retail | 2026 |
| Boomer Transport Ltd | Transport & logistics | 2013 |
| Boomeround Limited | Administrative & support | 2025 |
| Boomhug Limited | Manufacturing | 2025 |
| Boon Training Academy Limited | Other services | 2025 |
| Booska Limited | Hospitality | 2017 |
| Boost Commerce UK Ltd | Financial services | 2023 |
| Boost Hub Ltd | Wholesale & retail | 2025 |
| Boost International Ltd | Professional & scientific | 2022 |
| Boost Liquid Labs Ltd | Wholesale & retail | 2019 |
| Boota Ltd | Real estate | 2024 |
| Booth's Motor Spares Ltd | Wholesale & retail | 2010 |
| Boothroyd Haulage Ltd | Transport & logistics | 2014 |
| BOP Consulting Ltd | Professional & scientific | 2024 |
| Border Plastics Recycling Limited | Water & waste | 2020 |
| Borderless Global Ltd | Wholesale & retail | 2026 |
| Bordosa Ltd | Construction | 2018 |
| Borecki Limited | Construction | 2018 |