| BMF Contracts Limited | Administrative & support | 2016 |
| BMG Architects Ltd | Professional & scientific | 2024 |
| Bmould Civils Ltd | Construction | 2020 |
| BMP Electrical Engineering Services Limited | Other services | 2012 |
| BMS Design Ltd | Professional & scientific | 2007 |
| BMS Progress Group Ltd | Education | 2020 |
| BMS Progress LLP | | 2004 |
| Bmvit Ltd | Arts & recreation | 2024 |
| Bmvm Properties Ltd | Real estate | 2024 |
| BMW Homes Limited | Other services | 1996 |
| Bmxbounty Ltd | Wholesale & retail | 2025 |
| BN Express Ltd | Transport & logistics | 2023 |
| Bnet Ultra Limited | Information & communication | 2015 |
| Bngaway Ltd | Water & waste | 2026 |
| BNK Property Ltd | Real estate | 2026 |
| BNT Associates Limited | Administrative & support | 2023 |
| Bnza Consulting Limited | Professional & scientific | 2018 |
| Board North Ltd | Information & communication | 2025 |
| Boateng Consulting Limited | Information & communication | 2003 |
| Boatmeter Ltd | Wholesale & retail | 2021 |
| BOB Hindhaugh Associates Limited | Construction | 2010 |
| Bobby Young Ltd | Professional & scientific | 2015 |
| Bobkat Properties Limited | Real estate | 2022 |
| BOC Plumbing & Heating Limited | Construction | 2023 |
| Boddeel Technologies (UK) Limited | Information & communication | 2025 |
| Bode Clinic Limited | Health & social care | 2014 |
| Bode Education Limited | Education | 2020 |
| Bode Management Limited | Professional & scientific | 2019 |
| Body & Paint Repairs Limited | Wholesale & retail | 2008 |
| Body Symmetry Ltd | Health & social care | 2014 |
| Bodykind Holdings Limited | Wholesale & retail | 2017 |
| Bodykind Ltd | Health & social care | 2004 |
| Bodykind Trustees Limited | Administrative & support | 2025 |
| Bodyproject Calisthenics Limited | Arts & recreation | 2024 |
| Bodysculpt Transformation Centres Ltd | Arts & recreation | 2017 |
| Bodytech Warrington Ltd | Wholesale & retail | 2017 |
| Boeland Consultancy Limited | Administrative & support | 2025 |
| BOF Business Analysis Limited | Other services | 2018 |
| Bogso Ltd | Wholesale & retail | 2023 |
| Boilam Limited | Administrative & support | 2015 |
| Boiler Finance UK Limited | Construction | 2024 |
| Boiler Hive Ltd | Construction | 2021 |
| Boiler Minders Limited | Administrative & support | 2015 |
| Boiler Repair & Boiler Installation Limited | Construction | 2024 |
| Boilerable Limited | Construction | 2023 |
| Bokan ABC Ltd | Other services | 2025 |
| Bokan Easy Shop Ltd | Wholesale & retail | 2025 |
| Bold Lettings Limited | Real estate | 2023 |
| Bold Projects North West Limited | Construction | 2005 |
| Bold Street Piercing Limited | Wholesale & retail | 2011 |
| Bolden Cost Consulting Limited | Administrative & support | 2013 |
| Boldora Ltd | Wholesale & retail | 2026 |
| Bollinger Solutions Ltd | Construction | 2025 |
| Bolt Engineering Limited | Professional & scientific | 2018 |
| Bolting Darts Ltd | Wholesale & retail | 2015 |
| Bolton Maintenance Services Ltd | Administrative & support | 2014 |
| Bolton Marathon Ltd | Arts & recreation | 2019 |
| Bolton Plastics Limited | Professional & scientific | 1988 |
| Bolton Sports TV Ltd | Arts & recreation | 2023 |
| Bolton Stadium Hotel Ltd | Hospitality | 2022 |
| Bolton Structures Limited | Construction | 2003 |
| Bolton TV Ltd | Arts & recreation | 2023 |
| Bolton Wanderers Football Academy Limited | Extraterritorial | 2019 |
| Bolton Wanderers Football Club Academy Limited | Extraterritorial | 2019 |
| Bolton Wanderers Football Club Limited | Extraterritorial | 2019 |
| Bolton Wanderers Football Club Merchandising Limited | Extraterritorial | 2019 |
| Bolton Wanderers Football Club Sports TV Ltd | Arts & recreation | 2023 |
| Bolton Wanderers Football Club Stadium Hotel Ltd | Hospitality | 2022 |
| Bolton Wanderers Football Club Stadium Ltd | Hospitality | 2022 |
| Bolton Wanderers Football Club Travel Limited | Extraterritorial | 2019 |
| Bolton Wanderers Football Club TV Ltd | Arts & recreation | 2023 |
| Bolton Wanderers Ladies Football Club Limited | Extraterritorial | 2019 |
| Bolton Wanderers Limited | Extraterritorial | 2019 |
| Bolton Wanderers Stadium Hotel Ltd | Hospitality | 2022 |
| Bolton Wanderers Stadium Ltd | Hospitality | 2022 |
| Bolton Wanderers TV Ltd | Arts & recreation | 2023 |
| Bolton Wanderers Women Football Club Ltd | Arts & recreation | 2025 |
| Bolzoni Ltd. | Wholesale & retail | 1985 |
| Bonar Diving Consultancy (BDC) Ltd | Professional & scientific | 2023 |
| Bonbon Coffee Limited | Hospitality | 2023 |
| Bondbay Development Limited | Real estate | 2016 |
| Bondbay Investments Limited | Real estate | 2017 |
| Bondbay Limited | Real estate | 2014 |
| Bonfiglioli U.K. Limited | Manufacturing | 1981 |
| Boni Transporting Ltd | Transport & logistics | 2023 |
| Bonner Investments Limited | Real estate | 2020 |
| Bonnybridge Consulting Ltd | Administrative & support | 2025 |
| Bonruss Limited | Real estate | 1976 |
| Bonsai Property Group Ltd | Real estate | 2021 |
| Bonsall Services Limited | Professional & scientific | 2017 |
| BOO Cosmetics Limited | Wholesale & retail | 2010 |
| Boodee Sisters Limited | Wholesale & retail | 2025 |
| Bookmypaws Limited | Professional & scientific | 2025 |
| Boomerang Support Services Limited | Administrative & support | 2012 |
| Boost 2 Business Limited | Administrative & support | 2014 |
| Boost My Social Ltd | Information & communication | 2024 |
| Booth Golf & Leisure Limited | Construction | 2021 |
| Booth Group Holdings Limited | Financial services | 2020 |
| Booth Plant Company Holdings Limited | Other services | 2020 |
| Booth Soils and Aggregates Limited | Extraterritorial | 2020 |