| Beaver Road PUB Ltd | Hospitality | 2023 |
| Bebelo Ltd | Information & communication | 2021 |
| Bebs Limited | Administrative & support | 2023 |
| Becee Ltd | Health & social care | 2023 |
| Beckenham Theatre Trust | Arts & recreation | 1959 |
| Bedazzled Events Limited | Arts & recreation | 2010 |
| Beddlestone Limited | Real estate | 2002 |
| Bedfordshire Coffee Ltd | Hospitality | 2018 |
| BEE Drylining Ltd | Construction | 2024 |
| BEE Free on the Farm Ltd | Education | 2023 |
| BEE Mechanical Ltd | Professional & scientific | 2023 |
| BEE Tidy Limited | Manufacturing | 2026 |
| Beechwood Tree Surgery & Landscape Services Limited | Administrative & support | 2015 |
| Beeliever Limited | Manufacturing | 2015 |
| Beep - Financial Advice Service Ltd | Financial services | 2019 |
| Begold Limited | Professional & scientific | 2016 |
| Behappy Maintenance Ltd | Construction | 2023 |
| Beheart Creative Limited | Professional & scientific | 2025 |
| Behre Dolbear Emea Limited | Extraterritorial | 2024 |
| Behre Dolbear Engineering Services Limited | Mining & quarrying | 2009 |
| Behre Dolbear International Limited | Mining & quarrying | 2017 |
| Behre Dolbear UK Limited | Mining & quarrying | 1997 |
| Beila Bros Limited | Construction | 2010 |
| Being Taoist Ltd | Financial services | 2019 |
| Bekely Investments Limited | Construction | 2018 |
| Beldom Commercials Limited | Administrative & support | 1995 |
| Belgravia Bliss Limited | Construction | 2019 |
| Bell Construction South East Ltd | Construction | 2017 |
| Bell Grove Stud Farm Limited | Agriculture & fishing | 2022 |
| Bell House Foods Limited | Manufacturing | 2001 |
| Bella Vida Hairdressing Ltd | Other services | 2023 |
| Bella's Little Beauty Boutique Limited | Other services | 2020 |
| Belladonna Design Limited | Construction | 2015 |
| Belle & Co Studios Limited | Other services | 2024 |
| Belleplates Limited | Wholesale & retail | 2001 |
| Bellissima (Sunbury-On-Thames) Limited | Other services | 2012 |
| Bellnash Limited | Real estate | 2021 |
| Bells Garages (Richmond) Limited | Hospitality | 1967 |
| Bells Investments Limited | Real estate | 1998 |
| Bells of Revival Worldwide Ministries | Health & social care | 2008 |
| Belogic Systems Limited | Information & communication | 2016 |
| BEN Cheeseman Ltd | Manufacturing | 2023 |
| BEN J Brockwell Ltd | Construction | 2014 |
| BEN Robertson Props Ltd | Information & communication | 2022 |
| BEN Tarlton Ltd | Construction | 2013 |
| Ben-Gg Ltd | Wholesale & retail | 2018 |
| Benbenco Ltd | Information & communication | 2025 |
| Benchworks Dover Limited | Real estate | 2026 |
| Benham Carpentry Ltd | Construction | 2016 |
| Bens Dog Walking Services Limited | Other services | 2023 |
| Bens Reporting Online Ltd | Health & social care | 2022 |
| Beqo Cafe Ltd | Hospitality | 2025 |
| Bercarhurob Limited | Wholesale & retail | 2024 |
| Berch Investments Limited | Construction | 2020 |
| Beresford Hamilton Limited | Information & communication | 2018 |
| Beresfords Motor Company Limited | Wholesale & retail | 2020 |
| Bergamia Tea Ltd | Wholesale & retail | 2016 |
| Berkane Trade Ltd | Wholesale & retail | 2022 |
| Berkeley Hand Car Wash Heathrow Limited | Other services | 2022 |
| Berkeley Hand Carwash Ashford Ltd | Administrative & support | 2025 |
| Berkeley Square Property Group Limited | Construction | 2020 |
| Berkshire Building Solutions Limited | Construction | 2012 |
| Berkshire Turnaround Management Ltd | Professional & scientific | 2023 |
| Beroni Foods Ltd | Wholesale & retail | 2020 |
| Berry Nice Touch Limited | Construction | 2021 |
| Besa Meis Limited | Real estate | 2021 |
| Bespoke Construction&Co. Ltd | Construction | 2018 |
| Bespoke Financial Planning Kent Limited | Financial services | 2015 |
| Best Car 4 YOU Ltd | Wholesale & retail | 2017 |
| Best Dressed Group Ltd | Wholesale & retail | 2022 |
| Best Fish & Chips Ashford Ltd | Hospitality | 2025 |
| Best London Concrete Ltd | Manufacturing | 2022 |
| Best Natural Remedies Limited | Wholesale & retail | 2013 |
| Best of British Limited | Administrative & support | 2008 |
| Best of South Africa Travel Limited | Administrative & support | 2015 |
| Best Placed Services Ltd | Professional & scientific | 2018 |
| Best SAP Solutions Ltd | Wholesale & retail | 2012 |
| Best Touch Afro Braids Ltd | Other services | 2023 |
| Best Wealth Network UK Ltd | Professional & scientific | 2024 |
| Best Western Food Ltd | Wholesale & retail | 2019 |
| Bestalexcompany Ltd | Transport & logistics | 2017 |
| Bethel Consulting and Allied Services Ltd | Health & social care | 2024 |
| Bethersden Cars Limited | Wholesale & retail | 2021 |
| Bethersden Playschool Limited | Education | 1999 |
| Bethersden Property Company Limited | Real estate | 2010 |
| Betimes Marketing Limited | Professional & scientific | 2024 |
| Betta Coach Limited | Education | 2024 |
| Better Growth Ventures Ltd | Professional & scientific | 2017 |
| Better Sounds Consultancy Limited | Professional & scientific | 2002 |
| Bettercare Mental Health Ltd | Health & social care | 2026 |
| Betts & Co Solicitors Limited | Professional & scientific | 2009 |
| Betty's Bikes Limited | Wholesale & retail | 2009 |
| Beult Plumbing and Heating Limited | Construction | 2025 |
| Beverley Winston Limited | Information & communication | 2005 |
| Bewley Twenty Two Ltd | Professional & scientific | 2021 |
| Bexley Health Neighbourhood Care C.I.C. | Health & social care | 2015 |
| Beyond Fear Therapy Limited | Health & social care | 2025 |
| Beyond Stitching Ltd | Wholesale & retail | 2019 |
| Beyond the Brink Limited | Information & communication | 2000 |
| Beyond Zero (Global) Limited | Administrative & support | 2023 |