| Benii Ltd | Construction | 2023 |
| Benjamin and David's Ltd | Information & communication | 2025 |
| Benjamin Jacob Ltd | Professional & scientific | 2014 |
| Bennet Sidhu Builders Ltd | Construction | 2020 |
| Bennett's Castle Butchers Limited | Wholesale & retail | 2025 |
| Benning Construction Limited | Construction | 2000 |
| Benning Developments Limited | Construction | 2016 |
| Benpicks Ltd | Wholesale & retail | 2026 |
| Benson & Co. London Ltd | Administrative & support | 2022 |
| Bento Box T/A Little Tokyo Ltd | Hospitality | 2017 |
| Benton Road Consultancy Limited | Financial services | 2018 |
| Beny Drive Ltd | Transport & logistics | 2024 |
| Benylmconstruction Limited | Construction | 2026 |
| Benzoo Ltd | Wholesale & retail | 2021 |
| Beonetrading Ltd | Wholesale & retail | 2022 |
| Bepel Stratford Limited | Wholesale & retail | 2015 |
| Bepu Limited | Health & social care | 2014 |
| Bera Group Limited | Construction | 2017 |
| Berescu & Sons Ltd | Construction | 2020 |
| Bermiana Investment Ltd | Real estate | 2023 |
| Bermiana Properties Ltd | Real estate | 2026 |
| Bermiana Property Management LLP | | 2023 |
| Bernina Limited | Extraterritorial | 1988 |
| Bernina Sewing Machines Limited | Extraterritorial | 1988 |
| Berose DRY Cleaners Limited | Other services | 2013 |
| Berson Ltd | Transport & logistics | 2026 |
| Besafe Electric Limited | Construction | 2016 |
| Besidely Ltd | Information & communication | 2026 |
| Bespire Learning Limited | Education | 2020 |
| Bespoke & Tailoring Limited | Other services | 2018 |
| Bespoke Aluminium Solutions Ltd | Construction | 2020 |
| Bespoke Automotive London Ltd | Wholesale & retail | 2024 |
| Bespoke Business Limited | Professional & scientific | 2022 |
| Bespoke Executive Travel Limited | Transport & logistics | 2022 |
| Bespoke Financial Solutions Ltd | Financial services | 2018 |
| Bespoke Homes (Essex) Ltd | Construction | 2017 |
| Bespoke Parts Ltd | Wholesale & retail | 2018 |
| Bespoke Placement Ltd | Administrative & support | 2017 |
| Bespoke Plus HR Ltd | Administrative & support | 2014 |
| Bespoke Working Solutions Ltd | Information & communication | 2023 |
| Best 79 UK Limited | Wholesale & retail | 2019 |
| Best Catering London Ltd | Hospitality | 2026 |
| Best Choice Property Ltd | Real estate | 2025 |
| Best Ebuy Ltd | Wholesale & retail | 2022 |
| Best Facilities and Management Ltd | Administrative & support | 2021 |
| Best Global Services Ltd | Administrative & support | 2024 |
| Best Goodies Ltd | Wholesale & retail | 2019 |
| Best Group Services Ltd | Real estate | 2023 |
| Best Halal Butchers Ltd | Wholesale & retail | 2021 |
| Best in Hotel Ltd | Hospitality | 2024 |
| Best Inn Welfare Trust Ltd | Financial services | 2025 |
| Best Line Construction Ltd | Construction | 2017 |
| Best Luxury Cars Ltd | Wholesale & retail | 2021 |
| Best Moon Shop Ltd | Wholesale & retail | 2013 |
| Best of Construction Limited | Construction | 2026 |
| Best of Kebabish Limited | Hospitality | 2022 |
| Best Pest Control Services Ltd | Administrative & support | 2023 |
| Best Standard Properties Ltd | Real estate | 2023 |
| Best Travel Ltd | Professional & scientific | 2012 |
| Best UK Services Ltd | Professional & scientific | 2020 |
| Best Value Real Estate Ltd | Construction | 2025 |
| Best View Homes Ltd | Real estate | 2020 |
| Best Wheels Cars Limited | Other services | 2020 |
| Best-Uk Transport Limited | Transport & logistics | 2011 |
| BEST1 Security Services Ltd | Administrative & support | 2018 |
| BEST4LIFE Limited | Wholesale & retail | 2015 |
| Bestcom Limited | Wholesale & retail | 2024 |
| Bestech Private Ltd | Information & communication | 2014 |
| Bestgear Ltd | Wholesale & retail | 2026 |
| Bestgrade Ltd | Administrative & support | 2016 |
| Bestline Enterprises Ltd | Real estate | 1994 |
| Bestone Services Ltd | Agriculture & fishing | 2024 |
| Bestway Construction Ltd | Construction | 2020 |
| Bestway Investments Limited | Financial services | 2026 |
| Beswa Cargo Transport Ltd | Transport & logistics | 2022 |
| Beta Global Consultants Ltd | Professional & scientific | 2026 |
| Beth Living Support Ltd | Health & social care | 2026 |
| Better Gates Ltd | Manufacturing | 2025 |
| Better Homes Construction Ltd | Construction | 2017 |
| Better Impact Commerce Ltd | Wholesale & retail | 2025 |
| Betterhealthuk Ltd | Health & social care | 2022 |
| Betts Project LLP | | 2012 |
| Between Glass Blinds Limited | Manufacturing | 2013 |
| Bevan Maintenance Limited | Construction | 1997 |
| Beverages and Foods Ltd | Wholesale & retail | 2021 |
| Bexci Ltd | Wholesale & retail | 2026 |
| Bexfort Limited | Real estate | 2009 |
| Bexley Property Investments Ltd | Construction | 2016 |
| Bexley Superstore Ltd | Wholesale & retail | 2025 |
| BEY Mart Limited | Wholesale & retail | 2026 |
| Beyond Boba Ltd | Hospitality | 2021 |
| Beyond Business Trading Ltd | Wholesale & retail | 2020 |
| Beyond Eminence Ltd | Information & communication | 2022 |
| Beyond Zero Harm Ltd | Professional & scientific | 2025 |
| Beyondnowuk C.I.C. | Health & social care | 2026 |
| Beyound Limits Private Limited | Wholesale & retail | 2025 |
| Bezal Trading Ltd | Wholesale & retail | 2022 |
| BFC Contracts Ltd | Construction | 2023 |
| Bfcenterprises Limited | Professional & scientific | 2025 |
| BFI FIX Ltd | Construction | 2018 |