| Bourne Harris LLP | | 2016 |
| Bourne Hospitality Limited | Hospitality | 2011 |
| Bourne to FRY Ltd | Hospitality | 2025 |
| Bournemouth Language School Limited | Education | 2021 |
| Bourneville Property Group Ltd | Real estate | 2024 |
| Bournville Accounting Services Ltd | Professional & scientific | 2019 |
| Bournville Beekeepers | Agriculture & fishing | 2016 |
| Bournville Catering Holdings Limited | Financial services | 2026 |
| Bournville College Ltd | Education | 2019 |
| Bournville Drive and Patio Cleaning Ltd | Administrative & support | 2022 |
| Bournville Flowers and Plants Limited | Wholesale & retail | 2025 |
| Bournville Grange Limited | Health & social care | 2003 |
| Bournville Hair Limited | Other services | 2001 |
| Bournville Healthcare Limited | Health & social care | 2024 |
| Bournville House Ltd | Hospitality | 2011 |
| Bournville Landscaping & Garden Services Ltd | Administrative & support | 2019 |
| Bournville MOT and Service Centre Ltd | Wholesale & retail | 2025 |
| Bournville Property Maintenance Ltd | Real estate | 2016 |
| Bournville Solicitors Ltd | Other services | 2019 |
| Bournville Van Centre Ltd | Wholesale & retail | 2011 |
| Bournville Village Cricket Club Limited | Arts & recreation | 2025 |
| Bournville Village Developments Limited | Real estate | 1986 |
| Bournville Village Enterprises Limited | Real estate | 2021 |
| Bournz Property Services Limited | Construction | 2022 |
| Boutique Business Development Ltd | Administrative & support | 2020 |
| Boutique Documents Montessori Ltd | Education | 2017 |
| Boutique Enterprise Ltd | Administrative & support | 2015 |
| Boutique Hair Ltd | Other services | 2013 |
| Boutique Homes (Midlands) Ltd | Administrative & support | 2016 |
| BOV Management Limited | Real estate | 2007 |
| Bovieran UK Limited | Real estate | 2022 |
| BOW Consultancy Ltd | Professional & scientific | 2020 |
| BOW Investments Limited | Real estate | 2025 |
| BOW Leasehold Ltd | Professional & scientific | 2014 |
| Bowafoud Plaster Ltd | Construction | 2021 |
| Bowbrook Investments Limited | Financial services | 2005 |
| Bowen 80 Ltd | Wholesale & retail | 2023 |
| Bowers and Blair Limited | Wholesale & retail | 2018 |
| Bowler HAT Internet Services Limited | Information & communication | 2007 |
| Bowling Green Mews Limited | Households | 2017 |
| Bowne & Shaw Limited | Extraterritorial | 1921 |
| Bowse Space Limited | Hospitality | 2024 |
| Box 24 Ltd | Professional & scientific | 2023 |
| Box Fit Coaching Ltd | Information & communication | 2020 |
| Box Go Limited | Transport & logistics | 2026 |
| Box in Box JQ Ltd | Arts & recreation | 2025 |
| Box on Logistics Ltd | Other services | 2012 |
| Box Orange (Commercial) Ltd | Construction | 2023 |
| Box Orange (Maulden) Limited | Real estate | 2024 |
| Box Orange (Wellingborough) Ltd | Construction | 2023 |
| Box Orange Property Ltd | Construction | 2019 |
| Box Telematics Limited | Extraterritorial | 2000 |
| BOX4YOU Lettings & Management Ltd | Real estate | 2021 |
| Boxall Carpentry Ltd | Manufacturing | 2022 |
| Boxbag Ltd | Wholesale & retail | 2024 |
| Boxd Foods Ltd | Wholesale & retail | 2019 |
| Boxd Storage Solutions Ltd | Wholesale & retail | 2022 |
| Boxed Studios Ltd | Professional & scientific | 2022 |
| Boxedup Limited | Real estate | 1978 |
| Boxer Consulting Limited | Professional & scientific | 2004 |
| Boxes and Packaging (Birmingham) Limited | Administrative & support | 2005 |
| Boxes and Packaging (Bristol) Limited | Administrative & support | 2005 |
| Boxes and Packaging (Cambridge) Limited | Administrative & support | 1999 |
| Boxes and Packaging (Doncaster) Limited | Administrative & support | 2007 |
| Boxes and Packaging (Dumbarton) Limited | Administrative & support | 2009 |
| Boxes and Packaging (Leicester) Limited | Administrative & support | 2005 |
| Boxes and Packaging (Manchester) Limited | Administrative & support | 2005 |
| Boxes and Packaging (Merseyside) Limited | Administrative & support | 2005 |
| Boxes and Packaging (Oxford) Limited | Administrative & support | 2005 |
| Boxes and Packaging (Swindon) Limited | Administrative & support | 1988 |
| Boxes and Packaging (UK) Limited | Administrative & support | 2005 |
| Boxes and Packaging Limited | Professional & scientific | 2004 |
| Boxes-Uk Ltd | Professional & scientific | 2022 |
| Boxify Limited | Wholesale & retail | 2015 |
| Boxon Holdings Limited | Wholesale & retail | 2017 |
| Boxon Last Mile Services Limited | Transport & logistics | 2019 |
| Boxon Logistics (UK) Ltd | Transport & logistics | 2022 |
| Boxtree Consulting Ltd | Professional & scientific | 2026 |
| Boxvibe Apparel Limited | Manufacturing | 2025 |
| Boxworks Freehold Limited | Households | 2022 |
| Boxxed Ltd | Real estate | 2013 |
| Boxy Couriers Limited | Transport & logistics | 2025 |
| Boyd Family Property Ltd | Real estate | 2024 |
| Boyd Homes Ltd | Real estate | 2019 |
| Boyds Roofing Services Ltd | Construction | 2019 |
| Boythorpe Fryer Ltd | Hospitality | 2025 |
| BP Capital Investments Ltd | Financial services | 2025 |
| BP Holdings Ltd | Real estate | 2026 |
| BP Lincoln Limited | Hospitality | 2025 |
| BP Restaurant Ltd | Hospitality | 2022 |
| Bpas Trustee Limited | Professional & scientific | 2025 |
| BPB Hosiery Limited | Wholesale & retail | 2015 |
| BPC Builders Ltd | Construction | 2019 |
| BPC Foods Limited | Hospitality | 2022 |
| BPC Property Birmingham Limited | Real estate | 2018 |
| BPD Mail Ltd | Wholesale & retail | 2022 |
| BPG Estates Ltd | Real estate | 2025 |
| BPH Cakes Ltd | Wholesale & retail | 2021 |
| BPI Advisory Ltd | Information & communication | 2023 |
| BPI Holdings Limited | Real estate | 2022 |