| Bridetree Partners Limited | Financial services | 2023 |
| Bridge & Co Investments Ltd | Wholesale & retail | 2023 |
| Bridge Barbershop Ltd | Other services | 2026 |
| Bridge Engineering Limited | Manufacturing | 1984 |
| Bridge in the Sky Ltd | Information & communication | 2022 |
| Bridge View Oundle Management Company Limited | Households | 2005 |
| Bridgenet Ltd | Information & communication | 2025 |
| Bridgeport Construction Ltd | Construction | 2021 |
| Bridges FS Holdings Limited | Extraterritorial | 2018 |
| Bridgestock Property Limited | Real estate | 2026 |
| Bridgeway Family Support Services Ltd | Health & social care | 2026 |
| Briggate Service Centre Ltd | Wholesale & retail | 2025 |
| Briggs & Wortley (Anglia) Limited | Real estate | 1974 |
| Bright Business Advice Limited | Information & communication | 2005 |
| Bright Chameleon Limited | Wholesale & retail | 2013 |
| Bright Choice Support Ltd | Health & social care | 2024 |
| Bright DS Limited | Real estate | 2011 |
| Bright Fast Services Ltd | Transport & logistics | 2022 |
| Bright Hoodie Games Limited | Arts & recreation | 2021 |
| Bright Insight Estate Planning Limited | Professional & scientific | 2016 |
| Bright Ledger (Peterborough) Ltd | Professional & scientific | 2025 |
| Bright Line Developments Ltd | Construction | 2023 |
| Bright Lives Care Ltd | Administrative & support | 2023 |
| Bright PE1 Ltd | Households | 2019 |
| Bright Plan Services Ltd | Administrative & support | 2020 |
| Bright Professional Security Ltd | Administrative & support | 2022 |
| Bright Red Anchor Ltd | Professional & scientific | 2024 |
| Bright Star 13 Ltd | Transport & logistics | 2023 |
| Bright Street Ltd | Construction | 2023 |
| Bright Training Centre Ltd | Education | 2025 |
| Brighter Days Property Maintenance Limited | Construction | 2025 |
| Brighter Inspirations Limited | Information & communication | 2016 |
| Brighthire Ltd | Administrative & support | 2026 |
| Brightpath Staffing Ltd | Information & communication | 2010 |
| Brightsine Limited | Professional & scientific | 2022 |
| Brightway Consulting and Psychotherapy Ltd | Health & social care | 2025 |
| Brightwild Limited | Professional & scientific | 2024 |
| Briian Gardening Ltd | Administrative & support | 2022 |
| Brill Properties Limited | Real estate | 2017 |
| Brillanz Limited | Manufacturing | 2018 |
| Brillanz Technology Services Ltd | Construction | 2022 |
| Brimstone Close Property Management Company Limited | Real estate | 2022 |
| Brindleyclarke Property Ltd | Real estate | 2019 |
| Brisamar Corporate Solutions Limited | Professional & scientific | 2005 |
| Briss Property Group UK Ltd | Real estate | 2025 |
| Bristow Coffee Company Ltd | Hospitality | 2024 |
| Brit Industrial Services Group Limited | Professional & scientific | 2026 |
| Britannia Business Association Limited | Other services | 2026 |
| Britannia Crescent Residents Company Limited | Households | 2000 |
| Britannia Fire & Security (Holdings) Limited | Professional & scientific | 2005 |
| Britannia Fire & Security Limited | Administrative & support | 1997 |
| Britcoin Limited | Information & communication | 2021 |
| Britcommerce Ltd | Wholesale & retail | 2025 |
| Britedge Ventures Ltd | Wholesale & retail | 2024 |
| British EPC Limited | Administrative & support | 2009 |
| Britway AMB LLP | | 2026 |
| Brixenta Ltd | Wholesale & retail | 2026 |
| Brixie Logistics Ltd | Transport & logistics | 2026 |
| Brize (Kenley Avenue) Residents Company Limited | Households | 2026 |
| Brjt Ltd | Professional & scientific | 2025 |
| Brjt UK + LLP | | 2025 |
| BRK Trans Limited | Transport & logistics | 2019 |
| Broadbent Habitats Ltd | Agriculture & fishing | 2022 |
| Broadgate Weston Developments Ltd | Construction | 2024 |
| Broadsage Limited | Administrative & support | 2016 |
| Broadstone Strategic Holdings Limited | Financial services | 2026 |
| Broadview Building Services Limited | Real estate | 2003 |
| Broadway BAO CIC | Arts & recreation | 2025 |
| Broadway Developments (Peterborough) Limited | Construction | 1998 |
| Broadway Developments Yaxley Limited | Construction | 2019 |
| Broadway Garage Crowland Limited | Wholesale & retail | 2023 |
| Broadway Garage Yaxley Limited | Wholesale & retail | 2017 |
| Broadway Glass & Locks Ltd | Construction | 2017 |
| Broadway Grill Limited | Hospitality | 2021 |
| Broadway Investments Cambs Ltd | Real estate | 2025 |
| Broadway Pizza Palace Ltd | Hospitality | 2026 |
| Broadway Properties (Peterborough) Limited | Real estate | 1959 |
| Broadway Shipping Ltd | Transport & logistics | 2020 |
| Brocco Property Services Ltd | Construction | 2025 |
| Brock Close Limited | Households | 2020 |
| Brodie and Stone Holdings Ltd | Manufacturing | 1999 |
| Brodie and Stone International Ltd | Manufacturing | 1999 |
| Broken Holmes Limited | Arts & recreation | 2022 |
| Broken Inns Ltd | Hospitality | 2024 |
| Broker Development Limited | Financial services | 2011 |
| Broker Development Property Limited | Real estate | 2014 |
| Broker Services Solution Ltd | Information & communication | 2025 |
| Broker Solutions Services Ltd | Information & communication | 2025 |
| Bromco Property Rentals Limited | Real estate | 2011 |
| Bromham Road Development LLP | | 2014 |
| Brompton 360 Limited | Financial services | 2008 |
| Bronze Street Management Company Limited | Households | 2006 |
| Brook Green Numismatics Limited | Professional & scientific | 2018 |
| Brook Holding Ltd | Financial services | 2022 |
| Brook Invest Co Ltd | Real estate | 2022 |
| Brooke Farm Alpacas Ltd | Agriculture & fishing | 2021 |
| Brooke HR Services Ltd | Administrative & support | 2022 |
| Brooke Telecoms Ltd | Information & communication | 2016 |
| Brookhaven Consultants Ltd | Professional & scientific | 2025 |
| Brookman Properties Ltd | Real estate | 2025 |