| Bodydrop Ltd | Health & social care | 2021 |
| Bodymindtherapy Clinic Ltd | Health & social care | 2015 |
| Bogarts Barbershop Limited | Other services | 2017 |
| Bogdan B Ltd | Transport & logistics | 2019 |
| Boggett Mechanical Ltd | Professional & scientific | 2025 |
| Bogofshop Limited | Wholesale & retail | 2012 |
| Bohemy Hair Co Ltd | Other services | 2022 |
| Boho Weddings Ltd | Other services | 2012 |
| Bohokasbah Ltd | Wholesale & retail | 2024 |
| Boie Healthcare Ltd | Wholesale & retail | 2025 |
| Boiler + Install Limited | Construction | 2024 |
| Boiler Central Ltd | Wholesale & retail | 2016 |
| Boiler ED Ltd | Administrative & support | 2023 |
| Boilerbeat Ltd | Construction | 2024 |
| Boilerplate Limited | Information & communication | 2008 |
| Boja (Holdings) Limited | Financial services | 2019 |
| Boktor Medical Ltd | Health & social care | 2026 |
| Bola Cleaning Solutions Limited | Administrative & support | 2023 |
| Boldspirit Enterprise Limited | Wholesale & retail | 2021 |
| Bole Hill Management Limited | Households | 1979 |
| Bolehill Wood Co Ltd | Manufacturing | 2022 |
| Bolger Holdings Limited | Professional & scientific | 2005 |
| Bolsover Management Co Ltd | Households | 2023 |
| Bolt on Plus Ltd | Professional & scientific | 2023 |
| Bolthole Properties Limited | Hospitality | 2014 |
| Bolton and District Hospital Saturday Council | Financial services | 1953 |
| Bolton Building Surveying Limited | Professional & scientific | 2014 |
| Bolton Group Holdings Limited | Financial services | 2020 |
| Bolton Reed Limited | Professional & scientific | 2017 |
| Bolton Surgical Limited | Manufacturing | 1982 |
| Bolton Surgical Trust Limited | Financial services | 2026 |
| Bomar Properties Ltd | Real estate | 2009 |
| Bombdigital Limited | Other services | 2006 |
| BON Coffee Limited | Hospitality | 2023 |
| Bond Bryan Architects (Holdings) Limited | Professional & scientific | 2010 |
| Bond Bryan Architects Limited | Professional & scientific | 2007 |
| Bond Precision Grinding Limited | Wholesale & retail | 1985 |
| Bond Street Car Rentals Ltd | Administrative & support | 2024 |
| Bond Street Riviera Limited | Real estate | 2015 |
| Bondco 628 Limited | Arts & recreation | 1996 |
| Bondify Ltd | Wholesale & retail | 2024 |
| Bondy Holdings Ltd | Financial services | 2025 |
| Bondy Property Holdings Ltd | Financial services | 2026 |
| Bonelisse Limited | Wholesale & retail | 2025 |
| Boneloaf Limited | Information & communication | 2011 |
| Bonenanza Limited | Wholesale & retail | 2025 |
| Boney's Housekeeping Ltd | Hospitality | 2026 |
| Bonlec Electrical Ltd | Construction | 2022 |
| Bonnett Security Systems Ltd | Administrative & support | 2002 |
| Bonster Inc Ltd | Information & communication | 2025 |
| BOO Sales Limited | Wholesale & retail | 2016 |
| Boobot Electrical Installations Ltd | Construction | 2018 |
| Booh Media Limited | Administrative & support | 2011 |
| Bookflyers Ltd | Information & communication | 2024 |
| Bookkeepping Genie Services Ltd | Professional & scientific | 2019 |
| Bookmyself Ltd | Information & communication | 2025 |
| Books for Schools Limited | Wholesale & retail | 2016 |
| Bookwise Global Ltd | Professional & scientific | 2023 |
| Boomhaus Limited | Construction | 2022 |
| Boomstick Trading Ltd | Information & communication | 2025 |
| Boost Finance Ltd | Financial services | 2026 |
| Boost Publications Limited | Wholesale & retail | 2013 |
| Boost Vehicle Inspection Limited | Wholesale & retail | 2025 |
| Boost Your Grades Ltd | Education | 2025 |
| Boostsup Ltd | Education | 2025 |
| Booth & Sons Property Management Ltd | Real estate | 2023 |
| Booth & Starkiss Ltd | Manufacturing | 2025 |
| Booth Bros. Printing Limited | Manufacturing | 1988 |
| Booth Rail Ltd | Professional & scientific | 2026 |
| Boothby Property Limited | Real estate | 2003 |
| Booze Brothers Limited | Wholesale & retail | 1967 |
| Boozenet Ltd | Information & communication | 2019 |
| Boozy DO Limited | Extraterritorial | 2021 |
| BOP Property Limited | Real estate | 2026 |
| Boph Ltd | Education | 2023 |
| Bord Collective Limited | Professional & scientific | 2026 |
| Borden Electrics Ltd | Construction | 2011 |
| Borden Village Investments Ltd | Hospitality | 2025 |
| Bordo Properties Ltd | Real estate | 2025 |
| Bored Bar Engineering Limited | Manufacturing | 1973 |
| Bornballers Limited | Arts & recreation | 2022 |
| Borri Limited | Information & communication | 2015 |
| Boru Estates Limited | Real estate | 2016 |
| Boscobel Estates Limited | Real estate | 1996 |
| Bosko Properties Ltd | Real estate | 2023 |
| Bosphorus Property Ltd | Real estate | 2018 |
| Boss Developments Limited | Wholesale & retail | 2018 |
| Boss Labour Ltd | Construction | 2014 |
| Boss Plastering Limited | Construction | 2022 |
| Boss Prop Limited | Real estate | 2015 |
| Bostock Construction Ltd | Construction | 2019 |
| Bostock Scaffolding (UK) Limited | Wholesale & retail | 2004 |
| Boston Cartar Ltd | Manufacturing | 2023 |
| Boston Carter Limited | Wholesale & retail | 2022 |
| Botanic Bath Limited | Wholesale & retail | 2024 |
| Botanical Health Oils Hardware Ltd | Professional & scientific | 2015 |
| Botanical House Limited | Households | 2021 |
| Botanical View Limited | Real estate | 2009 |
| Bothrealities Ltd | Information & communication | 2010 |
| Botrix Ltd | Extraterritorial | 2020 |