| Belor and Sons Ltd | Administrative & support | 2016 |
| Beltrambini Ltd | Information & communication | 2024 |
| Bema Care Limited | Health & social care | 2020 |
| BEN & BEN Ltd | Administrative & support | 2024 |
| BEN Global Group Ltd | Transport & logistics | 2025 |
| Benatronix Home Limited | Wholesale & retail | 2024 |
| Benchmark Building Ltd | Construction | 2026 |
| Benco DEN NIG Ltd | Construction | 2019 |
| Benevolence Clothing Ltd | Wholesale & retail | 2025 |
| Bengal Bazar Ltd | Wholesale & retail | 2025 |
| Bengal Distributions Ltd | Wholesale & retail | 2015 |
| Bengal Enterprises London Ltd | Wholesale & retail | 2010 |
| Bengál Verde Limited | Wholesale & retail | 2026 |
| Beni-Vladi Ltd | Construction | 2022 |
| Benz Enterprise Limited | Wholesale & retail | 2022 |
| Berens Food and Wine Ltd | Wholesale & retail | 2023 |
| Beris Place Limited | Hospitality | 2026 |
| Berisha Prime Construction Ltd | Construction | 2026 |
| Berny Lanz Ltd | Real estate | 2009 |
| Berwick Harvey’S Ltd | Construction | 2024 |
| Besa Contractors Ltd | Construction | 2014 |
| Bespoke Trend Ltd | Other services | 2017 |
| Best at Less Store Ltd | Wholesale & retail | 2021 |
| Best Car Solutions Ltd | Wholesale & retail | 2021 |
| Best Care JS Limited | Health & social care | 2018 |
| Best Cash & Carry Limited | Wholesale & retail | 2018 |
| Best Eco Green Cleaning Service Ltd | Administrative & support | 2024 |
| Best Fish & Chips Essex Ltd | Hospitality | 2018 |
| Best Group of Companies Ltd | Real estate | 2024 |
| Best Quality Plumbing Ltd | Construction | 2024 |
| Best Ready Ltd | Wholesale & retail | 2021 |
| Best Smart Solution Ltd | Construction | 2015 |
| Bestfood Wholesale Ltd | Wholesale & retail | 2025 |
| Bestieclean Limited | Administrative & support | 2026 |
| Bestiecleaners Limited | Administrative & support | 2025 |
| Bestro Management Limited | Hospitality | 2022 |
| Beta Klean Limited | Real estate | 2015 |
| Beta Utility Ltd | Construction | 2020 |
| Bethel Groceries Ltd | Wholesale & retail | 2025 |
| Betterlife Financial Services Ltd | Financial services | 2020 |
| Betty's Unisex Hair Studio Limited | Other services | 2019 |
| Beulah Concept Limited | Other services | 2021 |
| Beyliss Enterprise Ltd | Real estate | 2021 |
| Beyond Foreigners Limited | Wholesale & retail | 2025 |
| Beyond Talent Development C.I.C. | Professional & scientific | 2025 |
| BFK Cleaning Service Ltd | Administrative & support | 2025 |
| BFL Star Ltd | Information & communication | 2023 |
| BG Mart Limited | Wholesale & retail | 2026 |
| BGC Reinforcement Ltd | Construction | 2011 |
| Bhad Group 4 Ltd | Real estate | 2025 |
| Bhangal Capital Ltd | Real estate | 2026 |
| Bheem Security Services Limited | Administrative & support | 2023 |
| BHG Global Limited | Wholesale & retail | 2010 |
| Bhogalhomes Ltd | Real estate | 2025 |
| Biadmat Ltd | Wholesale & retail | 2022 |
| Bianca Service Ltd | Administrative & support | 2025 |
| Bibi E&Aa Properties Ltd | Real estate | 2019 |
| Bibi Properties Holding Ltd | Real estate | 2025 |
| Bibis Bolts & Nuts Ltd | Construction | 2025 |
| Bidcraft Solutions Ltd | Professional & scientific | 2026 |
| Bifex Limited | Professional & scientific | 1998 |
| Big Boss Services (UK) Ltd | Construction | 2013 |
| Bihan Solutions Ltd | Health & social care | 2021 |
| Bilat Bangla Ltd | Wholesale & retail | 2025 |
| Bilingual RS Limited | Professional & scientific | 2024 |
| Billericay Phones & Gadgets Ltd | Wholesale & retail | 2021 |
| Billymax Holdings Ltd | Wholesale & retail | 2026 |
| Bilo Kitchen Ltd | Wholesale & retail | 2023 |
| Bilquies Welfare Ltd | Health & social care | 2023 |
| Bimmer Navigation and Tech Ltd | Wholesale & retail | 2026 |
| Bimpe AI Labs Ltd | Information & communication | 2025 |
| Binary Professionals Limited | Information & communication | 2016 |
| Bionomics UK Ltd | Wholesale & retail | 2020 |
| Bionubs Health Services Limited | Health & social care | 2009 |
| Bioplast Limited | Wholesale & retail | 2021 |
| Biosphere Properties Limited | Real estate | 2020 |
| Biotalent International LP | | 2017 |
| BIR Contractors Ltd | Construction | 2024 |
| Birch Wharf Holdings Limited | Financial services | 2026 |
| Bismill Limited | Construction | 2025 |
| Bismillah Management Ltd | Hospitality | 2016 |
| Bismillahhomes Limited | Real estate | 2023 |
| Bits N Bobs E-Com Ltd | Wholesale & retail | 2024 |
| BIZ Hedge Ltd | Information & communication | 2025 |
| BIZ4UONLINE Limited | Wholesale & retail | 2004 |
| Bizbuy Trade Ltd | Wholesale & retail | 2023 |
| Bizmentor Ltd | Information & communication | 2020 |
| Biznessonly Limited | Real estate | 2021 |
| Biztechsols Ltd | Information & communication | 2022 |
| Bizzy Mamaz Limited | Hospitality | 2020 |
| BK Automotives Ltd | Wholesale & retail | 2017 |
| BK Mohd Limited | Wholesale & retail | 2024 |
| BK Pro Construction Ltd | Construction | 2017 |
| BK Transport & Moving Limited | Transport & logistics | 2019 |
| Bk.Leather Limited | Wholesale & retail | 2023 |
| BKS Medical Services Ltd | Health & social care | 2025 |
| BKS Security Consultants Ltd | Administrative & support | 2025 |
| BKS Training Ltd | Education | 2012 |
| BL Solutions Ltd | Wholesale & retail | 2023 |
| BL3 Transport Ltd | Transport & logistics | 2025 |