| BE Hectic Ltd | Wholesale & retail | 2022 |
| BE More Studio Limited | Arts & recreation | 2018 |
| BE Persistent 1OF1 Ltd | Wholesale & retail | 2025 |
| BE Secure Alarms Ltd | Construction | 2015 |
| BEA Smart Heating Ltd | Construction | 2021 |
| Beagle Airmech Ltd | Manufacturing | 2020 |
| Beam Creation Ltd | Professional & scientific | 2022 |
| Beambridge Limited | Wholesale & retail | 2024 |
| Beas Catering Ltd | Hospitality | 2018 |
| Beast Fighting Gears Ltd | Wholesale & retail | 2023 |
| Beata Construction Ltd | Construction | 2026 |
| Beau-Jolly Limited | Administrative & support | 1983 |
| Beauty Bar Ruxley Ltd | Other services | 2025 |
| Beauty Bar Surrey Ltd | Other services | 2020 |
| Beauty Hause Ltd | Other services | 2024 |
| Beauty Maison London Ltd | Other services | 2025 |
| Beautyshelf Ltd | Wholesale & retail | 2024 |
| Beddington Park Residents Association Limited | Households | 1986 |
| Bedford Terrace (Sutton) Management Limited | Households | 1988 |
| Bedford Terrace Freehold Limited | Households | 2000 |
| BEE Inclusive CIC | Health & social care | 2019 |
| Beech Management Company Limited | Households | 1994 |
| Beeches Biomass Limited | Wholesale & retail | 2017 |
| Beeches Building Ltd | Construction | 2023 |
| Beeches Property Investment Ltd | Households | 2017 |
| Beeches Tree Care Limited | Administrative & support | 2003 |
| Beeches Tree Care Services Limited | Administrative & support | 2011 |
| Beechmore Construction Ltd | Construction | 2013 |
| Beej Investments Limited | Real estate | 2026 |
| Bees Nest Services Ltd | Administrative & support | 2012 |
| Befresh Solutions Ltd | Professional & scientific | 2013 |
| Begzadeh Barbers Ltd | Other services | 2025 |
| Behind Pixels Ltd | Information & communication | 2013 |
| Beignet Beignet Ltd | Wholesale & retail | 2025 |
| Beijing Garden Ltd | Hospitality | 2023 |
| Bekai Ltd | Financial services | 2019 |
| Bekinwari Properties Limited | Real estate | 2026 |
| Bekolink UK Ltd | Real estate | 2012 |
| BEL Steel Ltd | Manufacturing | 2019 |
| Belfonic Limited | Information & communication | 2019 |
| Believe.U Ltd | Wholesale & retail | 2025 |
| Bella & Hana Limited | Real estate | 2026 |
| Belle Epoque Vintique Rentals Limited | Administrative & support | 2024 |
| Bellevue of London Ltd. | Wholesale & retail | 2015 |
| Bellikli Group Ltd | Real estate | 2019 |
| Belloz Ltd | Other services | 2025 |
| Bellsbuses Limited | Transport & logistics | 2019 |
| Bellwether Solicitors Ltd | Professional & scientific | 2016 |
| Belmont Express Ltd | Wholesale & retail | 2024 |
| Belmont Foods and Wines Ltd | Wholesale & retail | 2018 |
| Belmont Multi Estates Limited | Real estate | 2021 |
| Belmont Point Limited | Professional & scientific | 2015 |
| Belvedere Hill Ltd | Financial services | 2005 |
| Bemrose Limited | Other services | 1989 |
| BEN Lannoy Landscapes Ltd | Administrative & support | 2015 |
| Bengal & Spice and My Sushi Limited | Hospitality | 2026 |
| Benguela Cove Investments Limited | Arts & recreation | 1936 |
| Benhilton Court Residents Association Limited | Households | 1994 |
| Bennett Holdings Ltd | Real estate | 2025 |
| Bennett Medical Limited | Health & social care | 2024 |
| Bennett's Building Company Ltd | Construction | 2017 |
| Beon Plastering Ltd | Construction | 2025 |
| Berachah Homes Ltd | Real estate | 2024 |
| Berfin Fish & Chips Limited | Hospitality | 2019 |
| Berkeley Food Equipment Limited | Extraterritorial | 1972 |
| Berkeley Projects International Limited | Extraterritorial | 1996 |
| Berkovi Consulting Limited | Professional & scientific | 2008 |
| Berkshire Aviation Limited | Wholesale & retail | 2021 |
| Berrite Limited | Real estate | 1990 |
| Bespoke Property Training Ltd | Extraterritorial | 2021 |
| Bespoke Transport Solutions Ltd | Transport & logistics | 2018 |
| Best Buy Skips Ltd | Water & waste | 2025 |
| Best Location Catering Ltd | Wholesale & retail | 2019 |
| Best Nests Dorset Limited | Real estate | 2023 |
| Best Rate Tyres Ltd | Wholesale & retail | 2024 |
| Best School of Driving Limited | Education | 2017 |
| Best Second Hand Ltd | Wholesale & retail | 2016 |
| Bestore Ltd | Wholesale & retail | 2023 |
| Betap Investments Ltd | Real estate | 2021 |
| Betchworth Close Management Limited | Households | 2009 |
| Beulah Links Limited | Health & social care | 2025 |
| Beverley Trading Estate Limited | Real estate | 1984 |
| Bexley Appliances Ltd | Wholesale & retail | 2026 |
| Beyond Borders Consultants Ltd | Other services | 2023 |
| Beyond Love Limited | Administrative & support | 2022 |
| Beyzade Ltd | Hospitality | 2020 |
| BFO Consortium Ltd | Education | 2017 |
| BG Jewellery Ltd | Wholesale & retail | 2026 |
| BGM Construction 2025 Ltd | Construction | 2025 |
| Bharathi Ltd | Information & communication | 2014 |
| Bhargava Limited | Real estate | 2019 |
| Bhatti Associate Ltd | Health & social care | 2026 |
| Bhnk 1 Limited | Real estate | 2024 |
| Bhupra Limited | Construction | 2019 |
| Bibitibop Ltd | Arts & recreation | 2025 |
| Bienvenuestays Ltd | Real estate | 2026 |
| Big Bada Properties Limited | Real estate | 2015 |
| Big City Beat Ltd | Administrative & support | 2023 |
| Big Clothing Ltd | Wholesale & retail | 2011 |
| Big Kebab Ltd | Hospitality | 2024 |