| Brighter Buying Ltd | Professional & scientific | 2010 |
| Brighter Care Agency Limited | Health & social care | 2013 |
| Brighter Electrical Limited | Construction | 2019 |
| Brighter Smile Dental Surgery Ltd | Health & social care | 2023 |
| Brighter Smile Family Dental Centre LP | | 2012 |
| Brightoak Consultancy Limited | Information & communication | 2010 |
| Brighton Beautiful (Cosmetic Medicine) Limited | Health & social care | 2007 |
| Brightriver Homes Limited | Construction | 2022 |
| Brightsidept Limited | Arts & recreation | 2010 |
| Brightsidept Whiteley Limited | Arts & recreation | 2023 |
| Brightview Property Group Ltd | Real estate | 2018 |
| Brilent Delivery Service Ltd | Transport & logistics | 2023 |
| Brilliant Estates Ltd | Real estate | 2025 |
| Brilliant Fade Ltd | Other services | 2025 |
| Brip 3 (Highcliffe) LLP | | 2020 |
| Bristol Coffee House Ltd | Hospitality | 2025 |
| Bristol Sundaes Ltd | Hospitality | 2016 |
| Bristowe Fire Ltd | Public administration | 2019 |
| Brit Expo Limited | Wholesale & retail | 2023 |
| Brit Online Retail Ltd | Wholesale & retail | 2025 |
| Britannia Taxi Services Limited | Transport & logistics | 2023 |
| Britannia Transportation Services Ltd | Transport & logistics | 2024 |
| Britindia Ltd | Professional & scientific | 2022 |
| Britinvest Properties Ltd | Real estate | 2024 |
| British Association of Medical Aesthetic Nurses | Other services | 2013 |
| British Cultural Bridge Publishing Ltd | Wholesale & retail | 2025 |
| British Marine Federation | Other services | 1991 |
| British Schools in the Middle East | Education | 2012 |
| Brits Digital Ltd | Information & communication | 2015 |
| Britstone Finance Ltd | Professional & scientific | 2025 |
| Briwill Carpentry & Building Ltd | Construction | 2008 |
| Brixham Yacht Harbour Limited | Professional & scientific | 1978 |
| Broad Leys Publications Limited | Information & communication | 2002 |
| Broad Meadows Hampshire Ltd | Agriculture & fishing | 2024 |
| Broad Reach Projects Limited | Arts & recreation | 2010 |
| Broadbeach Limited | Wholesale & retail | 2020 |
| Broadcast Electronics Ltd | Information & communication | 2010 |
| Broadgate Farm Management Company Limited | Households | 2015 |
| Broadhalfpenny Down Preservation Trust | Arts & recreation | 2010 |
| Broadlands Vehicles Limited | Wholesale & retail | 2017 |
| Broadleaf Community Learning C.I.C. | Health & social care | 2023 |
| Broadleaf Digital Solutions Ltd | Information & communication | 2024 |
| Broadleaf Ecology Limited | Professional & scientific | 2021 |
| Broadoak Property Management Ltd | Real estate | 2001 |
| Broadside Property Management Limited | Real estate | 2017 |
| Broadstone Holdings (Trowbridge) SPV Ltd | Real estate | 2025 |
| Broadstone Holdings Ltd | Real estate | 2025 |
| Broadsword Fire Protection Limited | Construction | 2019 |
| Broadsword Group Limited | Other services | 2016 |
| Broadsword Projects Limited | Construction | 1998 |
| Broadsword Property Holdings Limited | Real estate | 2009 |
| Broadsword Residential Limited | Construction | 2014 |
| Broadsword Screeding Limited | Construction | 2012 |
| Broadview Consultancy and Training Ltd | Professional & scientific | 2015 |
| Broadway Fisheries Limited | Hospitality | 2011 |
| Broccoli Hair Limited | Other services | 2015 |
| Brockbuild Holdings Limited | Financial services | 2021 |
| Brockbuild Ltd | Construction | 2013 |
| Brockway Solutions Ltd | Construction | 2024 |
| Brogan's Fire & Electrical Installations Ltd | Construction | 2018 |
| Brogue Homes Ltd | Real estate | 2025 |
| Brokenford Court Management Company Limited | Households | 2002 |
| Bronsea Ltd | Wholesale & retail | 2025 |
| Bronte Way 1964 Limited | Extraterritorial | 2014 |
| Brook Avenue Management Company Limited | Households | 2024 |
| Brook Contract Flooring Ltd | Construction | 2011 |
| Brook Court Owners Company Limited | Households | 1996 |
| Brook Flooring Ltd | Wholesale & retail | 2010 |
| Brook House Country Club (Hampshire) Limited | Other services | 1968 |
| Brook Lane Homes Limited | Construction | 2025 |
| Brook Marine Ltd | Transport & logistics | 2022 |
| Brook Park Warsash Limited | Households | 2000 |
| Brookavon Properties Limited | Real estate | 1962 |
| Brooker's Property Ltd | Real estate | 2019 |
| Brookerkelly Limited | Wholesale & retail | 2002 |
| Brookes & Gatehouse Limited | Extraterritorial | 2024 |
| Brookfield Heating Ltd | Construction | 2025 |
| Brooklady Ltd | Hospitality | 1996 |
| Brookley Civil Engineering Limited | Construction | 2006 |
| Brooklyn Lodges Ltd | Hospitality | 2023 |
| Brooklyn PSV Homes Limited | Real estate | 2003 |
| Brooklynn Consultancy Limited | Professional & scientific | 2011 |
| Brookmill Services Limited | Professional & scientific | 2020 |
| Brookrose Limited | Water & waste | 2013 |
| Brooks Construction Solutions Ltd | Construction | 2023 |
| Brooks Lawn Care Ltd | Administrative & support | 2023 |
| Brooks Sauramba Ltd | Information & communication | 2024 |
| Brookson (5380J) Limited | Administrative & support | 2007 |
| Brookspeed Automotive Group Limited | Financial services | 2017 |
| Brookspeed International Motorsport Limited | Arts & recreation | 2008 |
| Brookspeed Limited | Manufacturing | 1982 |
| Brookton 2000 Limited | Real estate | 1990 |
| Brookvale Care Homes Limited | Health & social care | 2014 |
| Brookvale Court (Management) Limited | Real estate | 1964 |
| Brookvale Property Ltd | Real estate | 2024 |
| Broomfield Construction & Development Ltd | Construction | 2004 |
| Bros Cleaning Ltd | Administrative & support | 2026 |
| Brotecs Technologies Ltd | Information & communication | 2024 |
| Brothers Carpentry & Joinery Ltd | Manufacturing | 2023 |
| Brow Formulations (Portswood) Limited | Other services | 2021 |