| Brighton Holistics Online Ltd | Education | 2022 |
| Brightpath Accommodation Ltd | Real estate | 2025 |
| Brightpath Education Ltd | Education | 2026 |
| Brightpaths Support C.I.C. | Administrative & support | 2021 |
| Brightside Contracting Services (Bedford) Ltd | Construction | 2012 |
| Brightside Housing (Three Counties) C.I.C. | Real estate | 2022 |
| Brillianz Limited | Professional & scientific | 2003 |
| Brilliome Ltd | Construction | 2025 |
| Brim-Build Ltd | Construction | 2023 |
| Brimham Resources Limited | Administrative & support | 2010 |
| Bring Express UK Limited | Transport & logistics | 2023 |
| Bringing Performance Alive in Education LLP | | 2025 |
| Bringoods Ltd | Wholesale & retail | 2021 |
| Brink Collective Ltd | Wholesale & retail | 2014 |
| Brinklow Films Ltd | Construction | 2022 |
| Brisca Limited | Wholesale & retail | 2023 |
| Brit Bangla Properties Ltd | Real estate | 2024 |
| Britannia Pro Abseiling Ltd | Construction | 2023 |
| Britballerz Ltd | Wholesale & retail | 2016 |
| Britheat Installations Ltd | Construction | 2025 |
| British Llama Society | Administrative & support | 2003 |
| British Pakistani Welfare Association Limited | Health & social care | 2023 |
| British Society of Soil Science | Other services | 2009 |
| British Thomson-Houston Company Limited(The) | Professional & scientific | 1960 |
| Britmal Ltd | Wholesale & retail | 2011 |
| Britnett MK Limited | Hospitality | 2009 |
| Briton OIL Ltd | Wholesale & retail | 2020 |
| Britton Transport Ltd | Transport & logistics | 2015 |
| Broad Reach (Bedford) Ltd | Households | 2000 |
| Broadlands Music Management Ltd | Information & communication | 2021 |
| Broadmead Business Park Services Limited | Households | 1989 |
| Broadway Mercantile Trust (Bedford) Limited | Real estate | 1936 |
| Broadway Vision Ltd | Wholesale & retail | 2018 |
| Brockhall Services Ltd | Construction | 2017 |
| Brokenness to Hope CIC | Education | 2026 |
| Broler Construction Limited | Construction | 1978 |
| Bromfield Ltd | Construction | 2002 |
| Bromham Autos Limited | Other services | 2016 |
| Bromham Corp Ltd | Wholesale & retail | 2022 |
| Bromham Estate Management Limited | Wholesale & retail | 2022 |
| Bromham Holdings Limited | Financial services | 1958 |
| Bromham House Management Company Limited | Real estate | 2015 |
| Bromham Road News - Cost Cutters Limited | Wholesale & retail | 2004 |
| Bromham Windows & Home Improvements Ltd | Construction | 2016 |
| Bromoco International Ltd | Wholesale & retail | 2015 |
| Bromoco Ltd | Construction | 2021 |
| Bronny Ready Ltd | Wholesale & retail | 2026 |
| Brook Farm Bund Ltd | Construction | 2017 |
| Brook Harris Ltd | Wholesale & retail | 2022 |
| Brook Stables Limited | Arts & recreation | 2018 |
| Brookes Automotive Services Limited | Other services | 2026 |
| Brookes Plumbing Limited | Construction | 2017 |
| Brookfield Brewing Company Limited | Professional & scientific | 2016 |
| Brookfield Road Bedford Ltd | Construction | 2018 |
| Brooklea Limited | Other services | 2016 |
| Brookridge Ltd | Real estate | 2025 |
| Brooks Health and Care Limited | Administrative & support | 2018 |
| Brooks House Property Management Ltd | Real estate | 2022 |
| Brookview Property Management Limited | Households | 2022 |
| Bros Distribution Ltd | Transport & logistics | 2022 |
| Brotherhood Investments Limited | Real estate | 2025 |
| Brothers Building and Maintenance Limited | Construction | 2019 |
| Brothers in Time Ltd | Wholesale & retail | 2021 |
| Brown COW Property Ltd | Real estate | 2025 |
| Brown Enterprises Ltd | Information & communication | 2020 |
| Brown's Building Development Limited | Construction | 2021 |
| Brown's Carpentry Ltd | Construction | 2025 |
| Browning Consulting Ltd | Professional & scientific | 2018 |
| BRS Enterprise Ltd | Real estate | 2018 |
| BRS Express Ltd | Wholesale & retail | 2012 |
| BRS Express RD Ltd | Real estate | 2019 |
| Bruce Wallond Electrical Ltd | Construction | 2023 |
| Brumble Limited | Extraterritorial | 2025 |
| Brunswick Place (Biggleswade) Limited | Households | 2011 |
| Bruschetta Ltd | Hospitality | 2022 |
| Bryan Pickering Construction Limited | | 1989 |
| Bryantheo Ltd | Administrative & support | 2023 |
| Bryt Ventures Ltd | Professional & scientific | 2026 |
| Brûler Candles Ltd | Wholesale & retail | 2021 |
| BS1212 Electrical Service Ltd | Construction | 2025 |
| Bsauk Limited | Education | 2016 |
| Bsbhamra Limited | Wholesale & retail | 2023 |
| Bsjs Properties Limited | Real estate | 2022 |
| Bsmm Ltd | Information & communication | 2023 |
| Bsop Holdings Limited | Financial services | 2023 |
| BSP Pro Flooring Ltd | Construction | 2023 |
| BT General Builders Ltd | Construction | 2019 |
| BT Ross & Co Limited | Administrative & support | 2014 |
| BTB Property Management Ltd | Real estate | 2021 |
| Btfc (Youth Development) Limited | Arts & recreation | 2020 |
| Btfc Investors Ltd | Arts & recreation | 2018 |
| BTH Components Limited | Manufacturing | 2011 |
| BTP Environmental Services Limited | Administrative & support | 2009 |
| BTS Ceiling Ltd | Administrative & support | 2017 |
| Bu.Kh. Construction Ltd | Construction | 2024 |
| Buason Holdings Ltd | Wholesale & retail | 2025 |
| Bubak Services Limited | Hospitality | 2024 |
| Bubble Land Splash Limited | Administrative & support | 2015 |
| Bubblegum Studio Ltd | Other services | 2025 |
| Bubbles Lighting Limited | Administrative & support | 2003 |