| BE More YOU Ltd | Professional & scientific | 2016 |
| Be-It Consultants Limited | Health & social care | 2023 |
| Beacon I.T. Security Ltd | Information & communication | 2010 |
| Beacons House Limited | Real estate | 2018 |
| Bead Properties Limited | Real estate | 2008 |
| Beale's (Caterers) Limited | Hospitality | 1937 |
| Beale's Hotels Limited | Hospitality | 2010 |
| Bean and Brew London Ltd | Hospitality | 2018 |
| Bean Bistro Limited | Hospitality | 2023 |
| Bean Cafe Ltd | Hospitality | 2024 |
| Beanie Productions Ltd | Information & communication | 2014 |
| Bear Access Road Limited | Real estate | 2014 |
| Bear Distribution Ltd | Wholesale & retail | 2022 |
| Bear in Mind Group Ltd | Information & communication | 2022 |
| Bear Sets Ltd | Professional & scientific | 2021 |
| Bearcat Digital Ltd | Professional & scientific | 2012 |
| Beatrice Ecaterina Ltd | Transport & logistics | 2025 |
| Beau DU Pont Housing Limited | Other services | 2016 |
| Beau Visage London Ltd | Other services | 2017 |
| Beaucare Drycleaners Limited | Other services | 2001 |
| Beauchamp Court Management Limited | Professional & scientific | 1990 |
| Beauchamp Court Properties 2 Ltd | Real estate | 2020 |
| Beauchamp Court Properties Ltd | Real estate | 2019 |
| Beaufort Bridge Ltd | Professional & scientific | 2021 |
| Beaufort Care Limited | Health & social care | 2004 |
| Beaufort Court Residents Association (New Barnet) Limited | Real estate | 1990 |
| Beaulieu Group Limited | Manufacturing | 2015 |
| Beaulieu Limited | Financial services | 2015 |
| Beaumaris (Brownlow Road) Management Company Limited | Households | 1967 |
| Beaumonde Consultancy Limited | Professional & scientific | 2013 |
| Beautecamp Limited | Hospitality | 2020 |
| Beautiful Data Ltd | Information & communication | 2019 |
| Beautiful Perfect Dream Ltd | Wholesale & retail | 2016 |
| Beauty Babes Barnet Ltd | Other services | 2024 |
| Beauty Bar Products Ltd | Wholesale & retail | 2020 |
| Beauty Jabs Aesthetics Ltd | Health & social care | 2025 |
| Beauty Mama Limited | Wholesale & retail | 2024 |
| Beauty Zone Laser Clinic Ltd | Other services | 2019 |
| Beautymax Ltd | Wholesale & retail | 2019 |
| Beau’S Bubblebath Boutique Ltd | Wholesale & retail | 2023 |
| Beaver Build House Ltd | Construction | 2020 |
| Becca Hair and Beauty Ltd | Other services | 2020 |
| Becketts Brokers Limited | Administrative & support | 2020 |
| Beckos Invest Limited | Transport & logistics | 2015 |
| Bedford Close Management Limited | Households | 1971 |
| Bedford ROW Capital PLC | Professional & scientific | 2016 |
| Bedfordbury (Covent Garden) LLP | | 2011 |
| Bedfords Surveyors Limited | Administrative & support | 2009 |
| Bedros Properties Limited | Real estate | 2019 |
| BEE Focused Consultancy Limited | Professional & scientific | 2019 |
| Beech Grove Audio Ltd | Information & communication | 2018 |
| Beech Hill (Beulah) Management Company Limited | Households | 2006 |
| BEECH7 Properties Limited | Households | 2021 |
| Beechfame Limited | Professional & scientific | 1995 |
| Beechwood Consultancy (Berkshire) Ltd | Professional & scientific | 2007 |
| Beegee Investments Ltd | Real estate | 2022 |
| Befootball Academy Limited | Arts & recreation | 2024 |
| Behind the Glass London Ltd | Hospitality | 2012 |
| Behnefit Personal Training Limited | Education | 2025 |
| Beirut Box Ltd | Hospitality | 2024 |
| Belcor Asset Management Ltd | Administrative & support | 2019 |
| Belcor Property Management Ltd | Administrative & support | 2025 |
| Belfast Capital Limited | Professional & scientific | 2011 |
| Belfont Hotels Ltd | Hospitality | 2020 |
| Belgravia (Barnet) Residents Association Limited | Households | 1997 |
| Bell Brook Rise Estate Management Ltd | Real estate | 2026 |
| Bell Maison Limited | Professional & scientific | 2000 |
| Bell Maison Probate Services Ltd | Professional & scientific | 2011 |
| Bell Maison Trustee Services Ltd | Administrative & support | 2017 |
| Bell Maison Wealth Management Ltd | Professional & scientific | 2014 |
| Bell View Training Limited | Education | 2017 |
| Bella BOO Bijou Ltd | Wholesale & retail | 2019 |
| Bella Cafe Ltd | Hospitality | 2022 |
| Bellavia Limited | Hospitality | 2019 |
| Bellcrown Associates Limited | Professional & scientific | 2004 |
| Belle Secrets Limited | Administrative & support | 2010 |
| Bellman Orthodontics Ltd | Health & social care | 2017 |
| Belsize Park Management Company 2017 Limited | Real estate | 2017 |
| Belslov Limited | Real estate | 2017 |
| Bema Ltd | Other services | 2020 |
| BEN and David Property Limited | Real estate | 2021 |
| BEN Levy Art Limited | Arts & recreation | 2014 |
| BEN Morris Property Limited | Real estate | 2024 |
| Bendam Visual Limited | Real estate | 2018 |
| Benedict Court Management Limited | Households | 1989 |
| Benjamins Events Ltd | Hospitality | 2022 |
| Bennett & Tiller Limited | Wholesale & retail | 2004 |
| Bennett UK Trading Limited | Other services | 2014 |
| Bens Bouncy Castle Ltd | Arts & recreation | 2025 |
| Benstrong Ltd | Professional & scientific | 2019 |
| Bentley Properties Solutions Limited | Real estate | 2024 |
| Berberouche Ltd | Extraterritorial | 2018 |
| Berkar Limited | Real estate | 1963 |
| Berkeley Genetics Limited | Financial services | 2023 |
| Berkshire London Ltd | Education | 2017 |
| Berkshires Holdings Limited | Professional & scientific | 2021 |
| Bernard Weatherill Limited | Manufacturing | 1920 |
| Bernard Weatherill Trading Ltd | Wholesale & retail | 2016 |
| Bero Fish Ltd | Hospitality | 2026 |
| Beronmoor Limited | Hospitality | 1998 |