| Belbertson Srietta Ltd | Wholesale & retail | 2025 |
| Belgian Umico Chemical Group Ltd | Manufacturing | 2025 |
| Belgium Hosdandon Chemical Industry Group Limited | Extraterritorial | 2025 |
| Belgium Primeax Stock Limited | Extraterritorial | 2024 |
| Belief Bloom Trade Ltd | Wholesale & retail | 2024 |
| Believe Energy Ltd. | Education | 2012 |
| Beliz Independent Living Ltd | Health & social care | 2026 |
| Belle Ligne Ltd | Wholesale & retail | 2025 |
| Bellecour Global Trading Limited | Wholesale & retail | 2026 |
| Bellek Labs Ltd | Information & communication | 2025 |
| Belletips Shop Ltd | Wholesale & retail | 2025 |
| Belluova Ltd | Wholesale & retail | 2024 |
| Beloveds World Limited | Information & communication | 2024 |
| Below Retail Ltd | Wholesale & retail | 2026 |
| Belvedere Interiors Limited | Wholesale & retail | 2023 |
| Bemas Gates EVO Ltd | Wholesale & retail | 2024 |
| BEN Blackburn Golf Hospitality & Leisure Limited | Arts & recreation | 2017 |
| BEN Delport Ltd | Wholesale & retail | 2025 |
| BEN Stephens Tuition Limited | Education | 2022 |
| Benchmark Cableglands Limited | Wholesale & retail | 2006 |
| Benefit Cosmetics CC Ltd | Wholesale & retail | 2025 |
| Bengaliness Research Initiative (BRI) Ltd | Information & communication | 2023 |
| Benjamin Wallington Tailoring Ltd | Wholesale & retail | 2023 |
| Bennu Trade Limited | Wholesale & retail | 2022 |
| Benny Marketing Limited | Wholesale & retail | 2026 |
| Benova HR Limited | Administrative & support | 2025 |
| Benovate Ltd | Construction | 2022 |
| Bentex Limited | Health & social care | 2022 |
| Bentours Ltd | Administrative & support | 2025 |
| Bentracy Limited | Real estate | 2022 |
| Benway Jerottineau Ltd | Wholesale & retail | 2025 |
| Benz Softwash Limited | Administrative & support | 2015 |
| Beremo Studios Ltd | Information & communication | 2025 |
| Beren & Denton Ltd | Manufacturing | 2021 |
| Berit International Chemical Group Co., Ltd | Extraterritorial | 2025 |
| Berkeley Hub Limited | Administrative & support | 2020 |
| Berkeley Mews CIC | Households | 2012 |
| Berkshire Health Clinic Ltd. | Health & social care | 2013 |
| Bernard & Cuthbert’S Ltd | Health & social care | 2018 |
| Bernstein Hoffman Ltd | Real estate | 2022 |
| Berraboi Ltd | Wholesale & retail | 2025 |
| Berry WU Limited | Wholesale & retail | 2024 |
| Berrybyte Limited | Information & communication | 2022 |
| Bertin Trading 786 Ltd | Wholesale & retail | 2021 |
| Berubik Limited | Extraterritorial | 2021 |
| Bese Trading Co., Ltd | Administrative & support | 2012 |
| Bespoke Bedroom Designs Ltd | Construction | 2019 |
| Bespoke Web Apps Limited | Information & communication | 2024 |
| Bessarabia Asset Management Ltd | Transport & logistics | 2022 |
| Bessent Trade Co., Ltd | Administrative & support | 2020 |
| Best Boilers Limited | Construction | 2021 |
| Best Crest Group Ltd | Information & communication | 2025 |
| Best Dragon Co., Ltd | Administrative & support | 2020 |
| Best Family Helper Media Co., Ltd | Wholesale & retail | 2025 |
| Best Hong Ltd | Wholesale & retail | 2025 |
| Best Immune Ltd | Wholesale & retail | 2017 |
| Best Marketing Service Ltd | Information & communication | 2025 |
| Best Music Video & Image Maker Limited | Administrative & support | 2018 |
| Best-Skins Ltd | Wholesale & retail | 2021 |
| Bestar LLK Ltd | Wholesale & retail | 2025 |
| Bestatternotruf (C) Selbsthilfeeinrichtung Guenstige Bestattungen E.V. | Professional & scientific | 2022 |
| Bestcodevista Ltd | Information & communication | 2025 |
| Bestext UK Ltd | Wholesale & retail | 2023 |
| Bestiewraps Ltd | Wholesale & retail | 2025 |
| Betensh UK Limited | Wholesale & retail | 2025 |
| Bethaneveslt Ltd | Health & social care | 2025 |
| Bethel Children's Care Limited | Health & social care | 2018 |
| Bethel Rental Property Limited | Real estate | 2024 |
| Better Business Communication Ltd. | Professional & scientific | 2005 |
| Better by Benee Ltd | Information & communication | 2022 |
| Better International Trade Co., Ltd | Administrative & support | 2015 |
| Better Patch Ltd | Wholesale & retail | 2024 |
| Better YOU Therapies Ltd | Other services | 2025 |
| Betton Mews Residents Association Ltd | Households | 2024 |
| Betula Innovations Limited | Professional & scientific | 2020 |
| Beutech Ltd | Information & communication | 2017 |
| Beverlaif LLP | | 2011 |
| Bevington Hill Estates Ltd | Construction | 2025 |
| Bewl Limited | Real estate | 2013 |
| Bexi Mani Trading Limited | Wholesale & retail | 2025 |
| Beyond Beauty & Nails Ltd | Administrative & support | 2017 |
| Beyond Borders IT Limited | Information & communication | 2023 |
| Beyond Bulk Buying Ltd | Wholesale & retail | 2025 |
| Beyond the Words Socials Limited | Professional & scientific | 2025 |
| Beyondrevelation Music Limited | Information & communication | 2025 |
| Beyondthespectrum Limited | Information & communication | 2016 |
| BF3 Ltd | Information & communication | 2026 |
| Bfitnesscollection Ltd | Wholesale & retail | 2026 |
| BG Culture Media Ltd | Wholesale & retail | 2025 |
| BG Soria Ltd | Wholesale & retail | 2025 |
| BGV Holdco Ltd | Financial services | 2025 |
| BHA Global Ltd | Professional & scientific | 2025 |
| Bha-Medical Limited | Professional & scientific | 2019 |
| Bhamber Estates Limited | Real estate | 2010 |
| Bhamber Properties Limited | Real estate | 2012 |
| BHS Landscapes and Driveways Ltd | Professional & scientific | 2026 |
| Biaccon Limited | Information & communication | 2017 |
| Bianconi Limited | Administrative & support | 2001 |
| BIB Network CIC | Other services | 2020 |
| Bidfocus Ltd | Professional & scientific | 2025 |