| Barretts Properties Ltd | Real estate | 2010 |
| Barrie Reynolds Plumbing & Heating Limited | Construction | 2019 |
| Bartley Green Shared Supported Living Limited | Real estate | 2021 |
| Barton Court Property Management Company Limited | Households | 2014 |
| Barton Properties Ltd | Real estate | 2011 |
| Baschurch Vale Management Company Limited | Households | 2017 |
| Baschurch Walk Management Company Limited | Households | 2018 |
| Base (Brentwood) Management Company Limited | Households | 2005 |
| Base Architects Limited | Professional & scientific | 2023 |
| Base Architecture and Design Limited | Professional & scientific | 2003 |
| Base Architecture Limited | Professional & scientific | 2023 |
| Basop Ltd | Professional & scientific | 2024 |
| Bates & Co Shrewsbury Limited | Professional & scientific | 2003 |
| Bates Properties Services Ltd | Real estate | 2025 |
| Bates Services Limited | Construction | 2024 |
| Batharms Limited | Real estate | 2018 |
| Battersea Aviation Ltd | Transport & logistics | 2024 |
| Battery Storage Box Limited | Transport & logistics | 2022 |
| Battlefield 1403 Limited | Hospitality | 2007 |
| Battlefield Construction Limited | Construction | 2014 |
| Battlefield Glass Limited | Manufacturing | 2016 |
| Battlefield Healthcare Limited | Health & social care | 2009 |
| Battlefield Land Surveys Ltd | Professional & scientific | 2008 |
| Battlefield Landscapes Ltd | Administrative & support | 2014 |
| Battlefield Machinery Limited | Wholesale & retail | 2016 |
| Battlefield Properties Limited | Real estate | 2013 |
| Battlefield Real Estate Holdings Limited | Financial services | 2022 |
| Battlefields Court Management Company Limited | Households | 2009 |
| Baumhouse Building & Renovation Limited | Construction | 2019 |
| Bawden Geary Limited | Administrative & support | 2016 |
| Bayhillcars Ltd | Wholesale & retail | 2019 |
| Baynton Services Limited | Professional & scientific | 2014 |
| Bayston Hill Storage Ltd | Transport & logistics | 2023 |
| Bazdel Home UK Limited | Construction | 2002 |
| Bazekamp Limited | Information & communication | 2026 |
| BB Hire Ltd | Construction | 2020 |
| BBD Marketing Ltd | Professional & scientific | 2019 |
| BBN International Limited | Professional & scientific | 2005 |
| BC Arrow Limited | Administrative & support | 1997 |
| BC Media Ltd | Information & communication | 2022 |
| Bchn Architects LLP | | 2022 |
| BE 2 H Limited | Health & social care | 2026 |
| BE Scientific Holdings Limited | Financial services | 2026 |
| BE Scientific Limited | Wholesale & retail | 2025 |
| BE YOU Housing Ltd | Hospitality | 2024 |
| Beach House Holiday Homes Ltd | Hospitality | 2023 |
| Beach U.K. Limited | Financial services | 1988 |
| Beacon View (Streetly) Management Company Limited | Households | 2006 |
| Beacon Wood (Walsall) Management Limited | Households | 2007 |
| Beacons Clinical Research Consultants Ltd. | Health & social care | 2000 |
| Beafresh Limited | Wholesale & retail | 2002 |
| Beamer Gardens Management Company Limited | Real estate | 2022 |
| Beans of Baschurch Ltd | Wholesale & retail | 2026 |
| Beau-T Clinic Shop Ltd | Wholesale & retail | 2025 |
| Beau-T Clinic Stockton Heath Ltd | Other services | 2025 |
| Beaufort Court (Chester) Management Company Limited | Real estate | 2018 |
| Beaufort Ridge Management Company Ltd | Extraterritorial | 2017 |
| Beaumont Rise Management Company Limited | Households | 2013 |
| Beautifill Cosmetic Limited | Other services | 2019 |
| Beauty and Beast Limited | Real estate | 2020 |
| Beaver Bridge Hire Ltd | Construction | 2012 |
| Beaver Bridges Limited | Construction | 2015 |
| Beaver Rail Limited | Construction | 2017 |
| Beckett Construction & Groundworks Limited | Construction | 2019 |
| BED Supermarket Online Ltd | Wholesale & retail | 2024 |
| Beech Jones Associates Limited | Health & social care | 2010 |
| Beechfield Stays Limited | Real estate | 2024 |
| Beechwood House (Wyllyotts) Management Ltd | Real estate | 2016 |
| Beeline Personnel Limited | Administrative & support | 2021 |
| Beemount Limited | Financial services | 2010 |
| Beeson Property Holding Limited | Real estate | 2017 |
| Belgrave Riverside Management Limited | Real estate | 2017 |
| Bell Concord Educational Trust Limited(The) | Education | 1980 |
| Bella Style Limited | Wholesale & retail | 2025 |
| Belle Domaine Ltd | Other services | 2023 |
| Belle Vale (Halesowen) Management Limited | Households | 2008 |
| Belle VUE Gardens Property Management Limited | Households | 2013 |
| Belle VUE Prestige Limited | Wholesale & retail | 2026 |
| Belle VUE Restorations Limited | Manufacturing | 2006 |
| Bellforge Capital Partners Limited | Professional & scientific | 2008 |
| Bellstone Live Limited | Arts & recreation | 2026 |
| Belmont Private Parking Ltd | Other services | 2010 |
| Belmont Properties (Shrewsbury) Limited | Real estate | 2013 |
| Belmont Security Limited | Administrative & support | 2016 |
| Belmont Services (Shropshire) Ltd | Manufacturing | 2006 |
| Beltam Limited | Wholesale & retail | 2024 |
| Belvidere Construction Limited | Construction | 2023 |
| Belvidere Financial Ltd | Financial services | 2017 |
| Belvidere Heating and Plumbing Limited | Construction | 2013 |
| Belvidere Lifts Ltd | Construction | 2003 |
| BEN Jones Properties Limited | Real estate | 2019 |
| BEN Morris Electrical Limited | Construction | 2009 |
| BEN Osborne Photography Limited | Professional & scientific | 2003 |
| BEN Parker Property Developments Ltd | Construction | 2022 |
| BEN Parker Property Investments Ltd | Real estate | 2022 |
| BEN Weaver Removals Ltd | Transport & logistics | 2020 |
| BEN Young Brickwork Ltd | Construction | 2024 |
| Benadé Ltd | Construction | 2022 |
| Benbow Bros (Holdings) Limited | Financial services | 2025 |
| Benbow Bros (Property) Limited | Real estate | 2025 |