| Brannach Film Ltd | Information & communication | 2019 |
| Brar Investments (NW) Ltd | Financial services | 2023 |
| Brassbuttonz Ltd | Administrative & support | 2010 |
| Bravejoin Company Limited | Construction | 1993 |
| Bravo Global Trading Ltd | Wholesale & retail | 2025 |
| Bravose Ltd | Wholesale & retail | 2018 |
| Bray Engineering Consultancy Ltd | Professional & scientific | 2024 |
| Bray Holdings Limited | Financial services | 2025 |
| Braymale Limited | Administrative & support | 1978 |
| Brazilian Slate and Stone Import Limited | Wholesale & retail | 2017 |
| BRC Groundworks Limited | Construction | 2005 |
| Bread Foundry Ltd | Extraterritorial | 2019 |
| Breakfree Stoke Ltd | Arts & recreation | 2026 |
| Brearb Tree Services Ltd | Administrative & support | 2022 |
| Brec Limited | Administrative & support | 1975 |
| Breck Developments Limited | Construction | 2014 |
| Breck Holdings Limited | Construction | 2017 |
| Breck Homes Limited | Construction | 2017 |
| Bremholdings Limited | Other services | 2023 |
| Brendan Anderton Butchers Limited | Wholesale & retail | 2003 |
| Brendan Fisher Limited | Wholesale & retail | 2004 |
| Brennard Textiles Limited | Wholesale & retail | 2015 |
| Brent Barrett Limited | Real estate | 2004 |
| Brentwood Clothing Ltd | Wholesale & retail | 2024 |
| Bretherton Homes Limited | Financial services | 2006 |
| Bretherton Horseboxes International Ltd | Wholesale & retail | 2024 |
| Brethertons Gold Line Tours Limited | Wholesale & retail | 2003 |
| Bretherton’S Bespoke Shooting Services Limited | Arts & recreation | 2025 |
| Brew Wise Ltd | Hospitality | 2024 |
| Brexit Dover Freight Forwarders Ltd | Transport & logistics | 2021 |
| BRG Holdco Limited | Administrative & support | 2022 |
| Brian Fairclough (Heating) Limited | Manufacturing | 2003 |
| Brian Hodgson Limited | Construction | 1960 |
| Brian Jackson Limited | Construction | 2011 |
| Brian Parkinson Plumbing and Heating Ltd | Construction | 2017 |
| Brian Rainford Construction Ltd | Construction | 2003 |
| Briar Dene Nursery School Limited | Education | 2000 |
| Briarfield Medical Limited | Health & social care | 2017 |
| Briarfield Properties Limited | Real estate | 2020 |
| Briarswood Garage Ltd | Wholesale & retail | 2019 |
| Brick FIX Ltd | Construction | 2022 |
| BRICK3D Printing Ltd | Manufacturing | 2025 |
| Brickhouse Gardens Limited | Administrative & support | 1997 |
| Brickhouse Media Group Limited | Information & communication | 2014 |
| Bricking IT Limited | Construction | 2020 |
| Bricks & Co Holdings Ltd | Real estate | 2025 |
| Bricz Supply Chain Ltd | Information & communication | 2019 |
| Bridal Chapters Ltd | Other services | 2026 |
| Bridge Business Associates Limited | Professional & scientific | 2016 |
| Bridge Care Recruitment Ltd | Transport & logistics | 2025 |
| Bridge Cottage Studio Ltd | Other services | 2021 |
| Bridge Mortgages and Protection Ltd | Financial services | 2024 |
| Bridge Stores Limited | Wholesale & retail | 1984 |
| Bridge Traders and Consultants Ltd | Professional & scientific | 2020 |
| Bridgedale Medical Services Limited | Health & social care | 2017 |
| Bridgeman Property Ltd | Real estate | 2015 |
| Bridgepoint Power Consulting Ltd | Professional & scientific | 2025 |
| Bridgeside Property Management Limited | Real estate | 2014 |
| Bridgeway Care Ltd | Health & social care | 2026 |
| Bridgeway Slope Builds Ltd | Construction | 2021 |
| Bridgewell Partners Limited | Professional & scientific | 2026 |
| Bridging Deals Limited | Financial services | 2015 |
| Brierley Park Ltd | Arts & recreation | 2021 |
| Briganti & Bartley Ltd | Real estate | 2025 |
| Briggaid Limited | Public administration | 2019 |
| Brigger Beer Limited | Hospitality | 2018 |
| Briggs Coaching Ltd | Education | 2025 |
| Bright Distribution Ltd | Wholesale & retail | 2025 |
| Bright Star IT Limited | Information & communication | 2017 |
| Bright Start Homes Community Interest Company | Health & social care | 2020 |
| Bright Start Homes Recovery Services Ltd | Health & social care | 2024 |
| Brightelm Properties Limited | Real estate | 2001 |
| Brighter Tomorrows (NW) Limited | Health & social care | 2025 |
| Brighter Wash Ltd | Other services | 2018 |
| Brightprint Ltd | Manufacturing | 2012 |
| Brightwaycareagency Ltd | Health & social care | 2023 |
| Brigid Investments Limited | Financial services | 2021 |
| Brigid Investments NO.5 Limited | Real estate | 2021 |
| Brigid UK Holdings Limited | Financial services | 2021 |
| Briks and Mortar Ltd | Real estate | 2020 |
| Briliam Consulting Limited | Professional & scientific | 2023 |
| Brilliant Horizons Lancashire Ltd. | Professional & scientific | 2018 |
| Brilliant Minds Preston Limited | Education | 2022 |
| Brilliantwave Ltd | Manufacturing | 2024 |
| Brimar Lettings and Management Limited | Real estate | 2000 |
| Brimston Group Limited | Education | 2019 |
| Brindle & PYE Limited | Professional & scientific | 1961 |
| Brindle (Petroleum) Limited | Wholesale & retail | 2012 |
| Brindle Homes Limited | Construction | 2009 |
| Brindle Limited | Other services | 2019 |
| Brindle Plumbing & Heating Limited | Professional & scientific | 2024 |
| Brindle Supported Housing Assosiation Ltd | Health & social care | 2025 |
| Bring YER Wellies Ltd | Arts & recreation | 2012 |
| Brinscall Interiors Limited | Wholesale & retail | 2019 |
| Brinscall Store Ltd | Wholesale & retail | 2025 |
| Bristol Drivers Club Limited | Extraterritorial | 2014 |
| Bristol Motor Cars Limited | Professional & scientific | 2020 |
| Bristol Motors (2020) Limited | Professional & scientific | 2020 |
| Bristol Owners Limited | Extraterritorial | 2014 |
| Bristol Owners Parts Supplies Ltd | Professional & scientific | 2020 |