| Brdnown Ltd | Health & social care | 2026 |
| Bread & Butter Productions Ltd | Information & communication | 2022 |
| Brearley Plastering Ltd | Construction | 2022 |
| Breathe First Ltd | Wholesale & retail | 2025 |
| Breeze Communications Ltd | Professional & scientific | 2025 |
| Bremang Consultancy Limited | Professional & scientific | 2021 |
| Brennen Consultancy Limited | Administrative & support | 2011 |
| Brex Fintech UK Limited | Financial services | 2019 |
| Brex Technologies UK Limited | Financial services | 2023 |
| BRF Foods UK Ltd. | Wholesale & retail | 2023 |
| Brian Wall Management Services Ltd | Construction | 2014 |
| Briana Tane Limited | Health & social care | 2026 |
| Briarcroft Holdings Limited | Financial services | 2026 |
| Briarmoon Hospitality Ltd | Hospitality | 2026 |
| Brickwork Developments Ltd | Construction | 2021 |
| Bridal Path Limited | Wholesale & retail | 2019 |
| Bridge CMC Limited | Information & communication | 2025 |
| Bridge Waters Associates Limited | Professional & scientific | 2016 |
| Bridgecap Corperate Partners Ltd | Construction | 2020 |
| Bridgefield Building Services Limited | Administrative & support | 2004 |
| Bridgefield Ltd | Construction | 2021 |
| Bridgegate Clothing Limited | Manufacturing | 1994 |
| Bridgeman Coaching Consultancy Ltd | Professional & scientific | 2021 |
| Bridgend Court RTM Company Limited | Households | 2025 |
| Bridgewater Developments (Property Solutions) Limited | Construction | 2011 |
| Bridgewater Financial Services Ltd | Financial services | 2006 |
| Bridgewater Financial Solutions Limited | Financial services | 2002 |
| Bridgewater Nursery Limited | Education | 2024 |
| Bridgewater Point Management Ltd | Households | 2015 |
| Bridgewater Wealth Protection Ltd | Financial services | 2015 |
| Bridgewater Wharf Ltd | Construction | 2015 |
| Bridgfords Limited | Professional & scientific | 1991 |
| Brief Case Limited | Administrative & support | 2008 |
| Briella Group Consulting Limited | Professional & scientific | 2026 |
| Bright Acre Consulting Ltd | Professional & scientific | 2026 |
| Bright Dental Agency Ltd | Health & social care | 2019 |
| Bright Horizon Globe Ltd | Hospitality | 2021 |
| Bright Ocean Care Limited | Health & social care | 2026 |
| Bright Partnership Limited | Professional & scientific | 2022 |
| Bright Star Merchants Ltd | Wholesale & retail | 2025 |
| Brighter Foods Limited | Manufacturing | 2013 |
| Brightlights Lighting Limited | Wholesale & retail | 2017 |
| Brightnewme Limited | Professional & scientific | 2012 |
| Brighton Property Holdings LLP | | 2018 |
| Brightrock Property Limited | Real estate | 2019 |
| Brightwave LED Limited | Wholesale & retail | 2024 |
| Brightwell Transport Limited | Transport & logistics | 2018 |
| Brilliant HR Limited | Professional & scientific | 2022 |
| Brinkley Propeller Services Limited | Professional & scientific | 2007 |
| Brinscall Care (NW) Group Limited | Financial services | 2022 |
| Brinscall Care (NW) Limited | Health & social care | 2021 |
| Brinscall Care (Propco) Limited | Financial services | 2020 |
| Bristol Bidco Limited | Financial services | 2019 |
| Bristol Holdco Limited | Construction | 2019 |
| Brit Jinky UK Ltd | Hospitality | 2023 |
| Britaly Ventures Ltd | Financial services | 2016 |
| Britannia Hotel (Coventry) Services Limited | Administrative & support | 1997 |
| Britannia Hotels NO3 Limited | Extraterritorial | 2023 |
| Britespark Productions Limited | Administrative & support | 2008 |
| British Football School Limited | Education | 2012 |
| Britonics Limited | Wholesale & retail | 2013 |
| Brival Properties Ltd | Real estate | 2019 |
| Brnb Limited | Professional & scientific | 2023 |
| Broad Lane Management Limited | Households | 1986 |
| Broadfield Business Park Ltd | Financial services | 2025 |
| Broadheath Builders Limited | Construction | 2022 |
| Broadheath Community Association | Other services | 2011 |
| Broadheath Development Projects Limited | Real estate | 2022 |
| Broadheath Developments Limited | Financial services | 2020 |
| Broadheath Holdings Limited | Construction | 2022 |
| Broadheath Land and New Homes Limited | Construction | 2022 |
| Broadsource Europe Limited | Information & communication | 2016 |
| Broadsword Consultancy Limited | Professional & scientific | 2021 |
| Broadway Realty Limited | Real estate | 2016 |
| Brockhurst Hall Management Limited | Households | 1989 |
| Brockley Square Management Company Limited | Real estate | 2014 |
| Brodan Property & Developments Ltd | Real estate | 2021 |
| Brogan Consultancy Limited | Administrative & support | 2017 |
| Brokensquare Limited | Administrative & support | 2010 |
| Brook Green Consulting Limited | Professional & scientific | 2010 |
| Brook Meade Insolvency Limited | Professional & scientific | 2022 |
| Brook Valley (Congleton) Management Limited | Households | 2011 |
| Brookdale Capital Limited | Real estate | 2013 |
| Brooke Capital Ltd | Financial services | 2026 |
| Brookfield Financial Planning Ltd | Financial services | 2001 |
| Brooklands (Hayfield) Management Company Limited | Households | 2002 |
| Brooklands Childcare (NW) Limited | Education | 2025 |
| Brooklands Childcare Ltd. | Education | 2004 |
| Brooklands Day Nurseries Ltd. | Professional & scientific | 2001 |
| Brooklands Dental Clinic Limited | Health & social care | 2007 |
| Brooklands Pizza Limited | Hospitality | 2021 |
| Brooks Drive Residents Association Ltd | Real estate | 2013 |
| Brookside Court (Upton) Limited | Households | 1962 |
| Brookside Residential Services Ltd | Hospitality | 2024 |
| Brookson (5019F) Limited | Professional & scientific | 2007 |
| Brookson (5149F) Limited | Professional & scientific | 2007 |
| Brookson (5189C) Limited | Professional & scientific | 2007 |
| Brookson (5234K) Limited | Professional & scientific | 2007 |
| Brookson (5240C) Limited | Administrative & support | 2007 |
| Brookson (5254E) Limited | Administrative & support | 2007 |