| Boing Midco Limited | Wholesale & retail | 2014 |
| Bokhari Property Ltd | Construction | 2016 |
| Bolagskonsulten Sweden Limited | Administrative & support | 2019 |
| Bolda Trading Limited | Information & communication | 2018 |
| Boldon James Limited | Information & communication | 1985 |
| Bolland & Bolland Limited | Information & communication | 2024 |
| Bolland and Lowe Limited | Professional & scientific | 2003 |
| Bollin Grange (Management) Limited | Households | 1982 |
| Bollin Homes Limited | Construction | 2012 |
| Bollin Kitchen Limited | Hospitality | 2023 |
| Bollin Way Ltd | Professional & scientific | 2025 |
| Bolt Cracker Limited | Manufacturing | 2011 |
| Bolt Walks Ltd | Agriculture & fishing | 2025 |
| Bombay Music Limited | Information & communication | 2020 |
| Bonded Welded Jewellery Ltd | Manufacturing | 2024 |
| Bonds Technical Couriers Ltd | Transport & logistics | 1995 |
| Bonds Worldwide Express Limited | Transport & logistics | 1985 |
| Bonds Worldwide Holdings Limited | Professional & scientific | 2002 |
| BOO Foods Ltd | Extraterritorial | 2023 |
| Boosnoo Limited | Information & communication | 2022 |
| Boost Finance Group Ltd | Financial services | 2026 |
| Booth BED Barns Management Company Limited | Households | 2016 |
| Boothbay Management UK LLP | | 2024 |
| Bootneck Building and Renovation Specialists Ltd | Construction | 2025 |
| Boots and Beyond Football Ltd | Arts & recreation | 2025 |
| Borlum House Farm Limited | Agriculture & fishing | 2020 |
| Borlum Properties (WY) Limited | Real estate | 2024 |
| Borlum Reay Limited | Real estate | 2026 |
| Borneo Consulting Limited | Administrative & support | 2013 |
| Bornheim Limited | Professional & scientific | 2023 |
| Borrow My Husband Ltd | Construction | 2020 |
| Borthers Limited | Arts & recreation | 2005 |
| Bosco Consulting Limited | Professional & scientific | 2025 |
| Boss Construction Resources Limited | Construction | 2025 |
| Bossy Homes Ltd | Construction | 2024 |
| Boston Spa Accountancy Ltd | Professional & scientific | 2017 |
| Boujee Boxes Limited | Wholesale & retail | 2020 |
| BOW Chambers Management Company Limited | Real estate | 2013 |
| BOW Green Mews (Bowdon) Limited | Households | 1972 |
| Bowcock Property Ltd | Real estate | 2003 |
| Bowden Norwood Park Management Co. Limited | Households | 1974 |
| Bowdenlake Consulting Limited | Professional & scientific | 2023 |
| Bowdon (Richmond Court) Management Company Limited | Households | 1973 |
| Bowdon 7 Ltd | Hospitality | 2023 |
| Bowdon AWP Limited | Arts & recreation | 2026 |
| Bowdon Bowling and Lawn Tennis Club (1873) Ltd | Arts & recreation | 1873 |
| Bowdon Bowling and Lawn Tennis Club Ltd | Arts & recreation | 2014 |
| Bowdon Builders Limited | Construction | 2005 |
| Bowdon Building Commercial Limited | Construction | 2022 |
| Bowdon Building Contractors Limited | Construction | 2016 |
| Bowdon Business Solutions Ltd | Information & communication | 2013 |
| Bowdon Club Ltd | Arts & recreation | 2022 |
| Bowdon Construction Limited | Construction | 2006 |
| Bowdon Consulting Ltd | Professional & scientific | 2002 |
| Bowdon Facilities Management Limited | Real estate | 2020 |
| Bowdon Financial Limited | Information & communication | 2015 |
| Bowdon Geological Services Limited | Professional & scientific | 2009 |
| Bowdon Holdings Ltd | Arts & recreation | 2022 |
| Bowdon Industrial Services Limited | Professional & scientific | 2018 |
| Bowdon Industries Limited | Professional & scientific | 2007 |
| Bowdon Lawn Tennis Club Limited | Arts & recreation | 2026 |
| Bowdon Oaks Limited | Real estate | 2022 |
| Bowdon Oaktree Limited | Real estate | 2022 |
| Bowdon Place Management Company Limited | Households | 2011 |
| Bowdon Preparatory School | Education | 2011 |
| Bowdon Projects Limited | Professional & scientific | 2016 |
| Bowdon Properties Limited | Real estate | 2003 |
| Bowdon Property Services Limited | Real estate | 2019 |
| Bowdon Townhouses Ltd | Construction | 2024 |
| Bowdon Townhouses Management Company Limited | Households | 2026 |
| Bowdon View Farm Limited | Agriculture & fishing | 2022 |
| Bowdon Villas (Management Company) Limited | Real estate | 2013 |
| Bower Rentals Limited | Real estate | 2017 |
| Bowfell Property Management Limited | Households | 2002 |
| Bowling Green Management Company Limited | Households | 1984 |
| Bowman & Evans Legal Recruitment Limited | Administrative & support | 2015 |
| Box Investment Property Limited | Real estate | 2023 |
| Box Law Limited | Administrative & support | 2020 |
| Box Madness Ltd | Other services | 2021 |
| Boxmate Ltd | Information & communication | 2016 |
| Boxsail Limited | Information & communication | 2001 |
| BPK Holdings GB LLP | | 2021 |
| BPK Test Solutions Limited | Administrative & support | 2013 |
| BPR Consultancy Ltd | Professional & scientific | 2014 |
| Bracket Venture Consulting Limited | Financial services | 2024 |
| Bradley Edge LLP | | 2011 |
| Bradley Property Ltd | Real estate | 2017 |
| Bradley Recruitment Ltd | Administrative & support | 2023 |
| Bradwood Flats (Services) Limited | Households | 1975 |
| Braemar Mortgage Services Limited | Financial services | 2009 |
| Brain Cell Industries Limited | Information & communication | 2017 |
| Brambletye Properties Ltd | Real estate | 2022 |
| Brand Evangelists for Beauty Limited | Wholesale & retail | 2017 |
| Brand Growth Partners Ltd | Professional & scientific | 2023 |
| Brand Love Solutions Limited | Professional & scientific | 2018 |
| Brandari Limited | Professional & scientific | 2020 |
| Bravo Alpha Lima Limited | Professional & scientific | 2019 |
| Bravo Breaks Ltd | Professional & scientific | 2025 |
| Bravozulu Solutions Limited | Professional & scientific | 2025 |
| Brazil Street Investments Limited | Extraterritorial | 2016 |