| Belforte Ltd | Other services | 2017 |
| Belgrade Partners LLP | | 2012 |
| Belief Botanicals Ltd | Manufacturing | 2022 |
| Belimmo Ltd | Real estate | 2018 |
| Belinda Budge Limited | Professional & scientific | 2014 |
| Bell Construction Managers LLP | | 2007 |
| Bella Vista Swanage LLP | | 2017 |
| Belle Civil Engineering Limited | Construction | 2016 |
| Belle VUE 56 Limited | Households | 2009 |
| Bellerose Properties Ltd | Real estate | 2021 |
| Bellissimo Events Limited | Other services | 2009 |
| Bellmark Creations Ltd | Wholesale & retail | 2019 |
| Bellori Limited | Wholesale & retail | 2025 |
| Bells Intumescent Coatings Ltd | Construction | 2023 |
| Bells of Steel UK Ltd | Wholesale & retail | 2025 |
| Bellsbands Ltd | Manufacturing | 2025 |
| Belmont Lacey Limited | Real estate | 2015 |
| Belmont Rise Management Limited | Households | 2004 |
| Belmour Lodge (Bournemouth) Limited | Households | 1971 |
| Belog BR Limited | Wholesale & retail | 2025 |
| Belvedere Management (NO.2) Limited | Real estate | 2002 |
| BEN Atkins Tree Care Ltd | Agriculture & fishing | 2023 |
| BEN Clarke Bespoke Ltd | Manufacturing | 2023 |
| BEN Cornish Sailing Limited | Arts & recreation | 2018 |
| Benamor Ltd | Hospitality | 2022 |
| Benamor Properties Winchester Ltd | Real estate | 2024 |
| Bencarla Limited | Real estate | 1976 |
| Benchmarque Designs Limited | Construction | 1998 |
| Bendall's Boxing Limited | Other services | 2020 |
| Benington Commercial Ltd | Construction | 2014 |
| Benjo&Co Ltd | Wholesale & retail | 2025 |
| Benjosbarbers Limited | Other services | 2022 |
| Benko Direct Ltd | Wholesale & retail | 2024 |
| Benko Solutions Ltd | Wholesale & retail | 2025 |
| Bennett Projects Ltd | Construction | 2015 |
| Bennetts Mini Coaches Limited | Transport & logistics | 2010 |
| Bennetts Traditional Marquees Limited | Extraterritorial | 1988 |
| Bennington Green Contracting Limited | Construction | 2021 |
| Bennington Green Holdings Limited | Professional & scientific | 2019 |
| Bennington Green Ltd | Professional & scientific | 2005 |
| Benson Specialist Projects Ltd | Professional & scientific | 2022 |
| Bentek Cloud Ltd | Information & communication | 2015 |
| Benussi Design Ltd | Professional & scientific | 2024 |
| Beowulf FDN Ltd | Information & communication | 2025 |
| Beracah Media Group Ltd | Information & communication | 2024 |
| Berelucent Ltd | Information & communication | 2016 |
| Berg International Limited | Manufacturing | 2025 |
| Bergson Court Residents' Association Limited | Real estate | 1994 |
| Berm Developments Ltd | Real estate | 2021 |
| Bermudez Investment Group Limited | Extraterritorial | 2021 |
| Berrans Court Limited | Real estate | 1962 |
| Berryhead Ltd | Real estate | 2016 |
| Bertley Limited | Wholesale & retail | 2018 |
| Bescent Limited | Wholesale & retail | 2022 |
| Besgi Limited | Hospitality | 2018 |
| Bespoke 4 Business Limited | Information & communication | 2008 |
| Bespoke 4 Business Marketing Ltd. | Professional & scientific | 2011 |
| Bespoke Electricz Limited | Construction | 2015 |
| Bespoke Garages Limited | Construction | 2023 |
| Bespoke Marketing Solutions Limited | Professional & scientific | 2024 |
| Bespoke Outdoor Buildings Ltd | Construction | 2020 |
| Bespoke Therapism Limited | Health & social care | 2010 |
| Best Build (Southern) Limited | Construction | 2017 |
| Best Immune International Ltd | Wholesale & retail | 2023 |
| Best Life Effective Support Services Ltd | Construction | 2024 |
| Best Management Services Ltd | Wholesale & retail | 2016 |
| Best Performance Limited | Professional & scientific | 2008 |
| Best Performance MB Ltd | Health & social care | 2025 |
| Best Tennis & Mortgages Ltd | Financial services | 2016 |
| Bet-Media Ltd | Professional & scientific | 2020 |
| Beth-Funfun Ltd | Manufacturing | 2023 |
| Bethel International Groups Ltd | Health & social care | 2025 |
| Better Health Homecare Ltd | Health & social care | 2024 |
| Betterdiscord Limited | Information & communication | 2021 |
| Bettersvat Limited | Wholesale & retail | 2018 |
| Bev's Beverages Ltd | Hospitality | 2019 |
| Bevan Residential Limited | Real estate | 2024 |
| Beverley Grange Freehold Limited | Households | 2004 |
| Beverley Grange Residents' Association Limited | Households | 1969 |
| Beximco Ltd | Hospitality | 2015 |
| Bextra Limited | Wholesale & retail | 2023 |
| Beyond Wild Meats Limited | Manufacturing | 2026 |
| Beyondme Enterprises Ltd | Information & communication | 2022 |
| Bfmckenna Ltd | Health & social care | 2022 |
| Bfpo Ventures Ltd | Financial services | 2026 |
| BGH Holdco Ltd | Financial services | 2025 |
| BGJ Building Specialist Ltd | Construction | 2023 |
| BH Capital Holdings Limited | Administrative & support | 2019 |
| BH Carpet Cleaning Limited | Administrative & support | 2023 |
| BH Clothing Ltd | Wholesale & retail | 2016 |
| BH Consultancy South Ltd | Information & communication | 2025 |
| BH Firewood Ltd | Wholesale & retail | 2026 |
| BH Haus II Limited | Construction | 2018 |
| BH Haus Limited | Construction | 2018 |
| BH Home Improvements Ltd | Construction | 2019 |
| BH Market Ltd | Wholesale & retail | 2026 |
| BH Million Hair Ltd | Other services | 2024 |
| BH Prime Rentals Limited | Real estate | 2024 |
| BH Property Maintenance & Management Ltd | Construction | 2025 |
| BH10 Consultancy Limited | Professional & scientific | 2020 |