| Botherless Consultants Ltd. | Real estate | 2019 |
| Bothwell Assets Limited | Extraterritorial | 2020 |
| Bothy & Bloom Ltd | Professional & scientific | 2025 |
| Botnas Ltd | Information & communication | 2024 |
| Botta Limited | Health & social care | 2019 |
| Bottle Safe Limited | Extraterritorial | 2014 |
| Bottled Imagination Holdings Ltd | Professional & scientific | 2025 |
| Bottled Imagination Ltd | Professional & scientific | 2022 |
| Bottlehawk Limited | Real estate | 2025 |
| Bouazza Driver Solutions Ltd | Transport & logistics | 2026 |
| Bouba & Morane Ltd | Health & social care | 2015 |
| Boudicca Estates Ltd | Real estate | 2020 |
| Boughbridge Ltd | Administrative & support | 2023 |
| Boughton Burger Ltd | Hospitality | 2025 |
| Bouirigue Global Services Ltd | Manufacturing | 2025 |
| Boukeffa Ltd | Health & social care | 2025 |
| Boulbonne Ltd | Financial services | 2022 |
| Boulder Trustee Limited | Financial services | 2018 |
| Boulevard View Management Limited | Real estate | 2020 |
| Boulton Enterprises Limited | Wholesale & retail | 2018 |
| Boulton Trade Ltd | Wholesale & retail | 2024 |
| Bounce Beyond Manchester Limited | Arts & recreation | 2019 |
| Bounce Engineering Management Services Ltd | Professional & scientific | 2022 |
| Bounce Healthcare Ltd | Administrative & support | 2010 |
| Bouncy Castle Hire Manchester Ltd | Administrative & support | 2023 |
| Boundary Park Holdings Ltd | Real estate | 2024 |
| Boundless Co PTY Ltd | Wholesale & retail | 2026 |
| Boundless Skies Ltd | Wholesale & retail | 2025 |
| Bouquet & Balloons Ltd | Wholesale & retail | 2024 |
| Bourdon Street (BC) Limited | Real estate | 2021 |
| Bourne END LP | | 2023 |
| Bourne END Nominees 1 Limited | Real estate | 2023 |
| Bourne END Nominees 2 Limited | Real estate | 2023 |
| Bourne Lettings Limited | Real estate | 2011 |
| Bourne Recruitment Limited | Administrative & support | 2019 |
| Bournedell Limited | Construction | 1993 |
| Bournedge Limited | Real estate | 1992 |
| Bournemouth Beach GP LLP | | 2022 |
| Bournemouth Beach LP | | 2022 |
| Bournemouth Beach Nominees 1 Limited | Real estate | 2022 |
| Bournemouth Beach Nominees 2 Limited | Real estate | 2022 |
| Bournemouth Estates Limited | Extraterritorial | 2016 |
| Bournemouth Quarter LP | | 2023 |
| Bourton Civils Ltd | Construction | 2026 |
| Boutinique Exquisite Ltd | Extraterritorial | 2021 |
| Boutique Connect Ltd | Real estate | 2026 |
| Boutique Sales Limited | Wholesale & retail | 2022 |
| Boutique Smokes Ltd | Wholesale & retail | 2017 |
| Bovis House Business Centre (NO.2) Limited | Professional & scientific | 2015 |
| Bovis House Business Centre Limited | Professional & scientific | 2007 |
| BOW Media & Production Limited | Other services | 2004 |
| BOW Street Properties Limited | Extraterritorial | 2014 |
| Bowden Lane Management Limited | Households | 2022 |
| Bowdon Accounting Services Ltd | Professional & scientific | 2023 |
| Bowdon Athletic FC CIC | Arts & recreation | 2025 |
| Bowdon Developments GB Limited | Construction | 2018 |
| Bowdon Estates Ltd | Real estate | 2019 |
| Bowdon Medical and Aviation Services Limited | Transport & logistics | 2002 |
| Bowdon Medical Services Ltd | Health & social care | 2022 |
| Bowdons Limited | Wholesale & retail | 2024 |
| Bowen & Richards Properties Ltd | Real estate | 2023 |
| Bowen Education CIC | Education | 2020 |
| Bowen Engineering (MCR) Limited | Construction | 2025 |
| Bower Property Developments Ltd | Real estate | 2024 |
| Bowers Mill Hotel Ltd | Hospitality | 2018 |
| Bowfell Brook Limited | Construction | 2022 |
| Bowie's Buddies Limited | Hospitality | 2019 |
| Bowke International Limited | | 1980 |
| Bowland Estates Limited | Real estate | 2003 |
| Bowland Projects Limited | Construction | 2020 |
| Bowland Property Development Limited | Construction | 2024 |
| Bowland Property Holdings Limited | Real estate | 2025 |
| Bowland Property Management Limited | Real estate | 2022 |
| Bowlee Court Management Limited | Households | 1992 |
| Bowlee Properties Ltd | Real estate | 2022 |
| Bowling-Ryan Prestige Specialists Limited | Wholesale & retail | 2023 |
| Bowman Specialised Liquids Limited | Manufacturing | 2013 |
| Bowman Travel Services Ltd | Administrative & support | 2015 |
| Bowmed Ibisqus Limited | Wholesale & retail | 2007 |
| Bowness Theatre Festival Limited | Arts & recreation | 2001 |
| Bowring Engineering Ltd | Professional & scientific | 2006 |
| Bowser Property Ltd | Real estate | 2019 |
| Box and Brand Limited | Wholesale & retail | 2025 |
| Box Bearings Ltd | Professional & scientific | 2022 |
| Box Clever Consulting Limited | Construction | 2015 |
| Box Code Ltd | Wholesale & retail | 2020 |
| Box Leisure Recruitment Ltd | Administrative & support | 2020 |
| Box Living Ltd | Real estate | 2020 |
| Box N Papers Ltd | Wholesale & retail | 2020 |
| Box of Desires Ltd | Wholesale & retail | 2021 |
| Box of Tricks Theatre Company | Education | 2011 |
| Box Recruitment Group Limited | Administrative & support | 2026 |
| Box Services Ltd | Transport & logistics | 2020 |
| Box Wholesale Limited | Wholesale & retail | 2025 |
| Box Works Management Limited | Households | 2000 |
| Boxed Accounting Limited | Professional & scientific | 2022 |
| Boxed OFF Grips Ltd | Information & communication | 2013 |
| Boxeley Limited | Financial services | 2022 |
| Boxelo Ltd | Wholesale & retail | 2026 |
| Boxertricks Gaming Ltd | Arts & recreation | 2022 |