| Bcurri Apparel Ltd | Wholesale & retail | 2020 |
| BDM Property Advisors Ltd | Professional & scientific | 2025 |
| BDQ Interiors Ltd | Professional & scientific | 2017 |
| Bdr-Home Improvement Ltd | Construction | 2020 |
| BDS Aesthetics Ltd | Health & social care | 2025 |
| BDS Build Construction Ltd | Construction | 2019 |
| BDS Courier U.K. Ltd | Transport & logistics | 2026 |
| BDS Properties Improvement Ltd | Real estate | 2024 |
| BE Alert Security Ltd | Financial services | 2023 |
| BE Care Wise Ltd | Health & social care | 2024 |
| BE Care Wise.Com Ltd | Health & social care | 2024 |
| BE Social Wise.Com Ltd | Professional & scientific | 2024 |
| BE Stylish Hair Salon Limited | Administrative & support | 2016 |
| BE Wise Group Ltd | Wholesale & retail | 2024 |
| BE YOU Hair and Beauty Ltd | Other services | 2019 |
| Be-Tween Ltd | Wholesale & retail | 2016 |
| Be-You Crystal Clean Ltd | Wholesale & retail | 2024 |
| Beach Construction Ltd | Construction | 2002 |
| Beacon Fostering Limited | Health & social care | 2023 |
| Beaconsfield Blasting Services Ltd | Manufacturing | 2025 |
| Beaconsfield Practice Limited | Health & social care | 2014 |
| Beamline Structural Engineer Ltd | Professional & scientific | 2025 |
| Beamplot Limited | Households | 1983 |
| Beamsley Lodge Ltd | Hospitality | 2024 |
| Beanice Limited | Wholesale & retail | 2001 |
| Bearehill Care Limited | Health & social care | 2019 |
| Bearings and More-Langley Limited | Wholesale & retail | 2009 |
| Bears in the Park Pre-School Limited | Education | 2017 |
| Beat ALL Shopfronts & Shutters Ltd | Construction | 2019 |
| Beat Music Production Limited | Information & communication | 2022 |
| Beatbyhaddi Limited | Other services | 2026 |
| Beau CAP Limited | Financial services | 2025 |
| Beau&Co Limited | Real estate | 2023 |
| Beaumonts Executive Ltd | Transport & logistics | 2013 |
| Beauti-Full Ltd | Wholesale & retail | 2018 |
| Beauty Angel London Limited | Other services | 2014 |
| Beauty by Beauty Ltd | Other services | 2019 |
| Beauty by Saima Ltd | Other services | 2026 |
| Beauty by Salina Ltd | Other services | 2025 |
| Beauty Franchise Academy Ltd | Education | 2020 |
| Bebe Transport Ltd | Transport & logistics | 2026 |
| Bedford Precast Limited | Construction | 2016 |
| BEE AI Ltd | Wholesale & retail | 2024 |
| BEE Good Services Ltd | Transport & logistics | 2025 |
| BEE Sting Hospitality Ltd | Hospitality | 2026 |
| Beechgrove Care Homes Limited | Professional & scientific | 2007 |
| Beechwood Associates London Limited | Real estate | 2019 |
| Beechwood Lettings Limited | Professional & scientific | 1998 |
| Beehee Ltd | Wholesale & retail | 2023 |
| Beeps & Bells Ltd | Wholesale & retail | 2025 |
| Bees Development Ltd | Administrative & support | 2020 |
| Bees Hive Ltd | Real estate | 2023 |
| Behl's Caring Ltd | Health & social care | 2019 |
| Being Framed Limited | Arts & recreation | 2017 |
| Beirut Deli Limited | Hospitality | 2019 |
| Bejetrans Ltd | Transport & logistics | 2019 |
| Beko Enterprises Limited | Transport & logistics | 2010 |
| Belal BEN Ltd | Transport & logistics | 2019 |
| Belhadj Optical Solutions Ltd | Health & social care | 2023 |
| Beljis Limited | Wholesale & retail | 2022 |
| Bell Hire Ltd | Wholesale & retail | 2017 |
| Bell Services Limited | Administrative & support | 2026 |
| Bell Trans Ltd | Transport & logistics | 2020 |
| Bella Avanti Ltd | Other services | 2020 |
| Bellahouse Property Services Limited | Real estate | 2012 |
| Belle Housing Ltd | Real estate | 2025 |
| Bellevue Learning Center Ltd | Education | 2025 |
| Bellhouse Mews Ltd | Construction | 2013 |
| Belmont Homes Ltd | Construction | 2020 |
| Belsize Capital 1 Holdings Limited | Health & social care | 2025 |
| Belsize Capital 2 Holdings Limited | Health & social care | 2025 |
| Belsize HC14 Limited | Health & social care | 2020 |
| Belsize HC20 Limited | Health & social care | 2020 |
| Belsize HC26 Limited | Health & social care | 2020 |
| Belsize Healthcare (England) Limited | Health & social care | 2020 |
| Belsize Healthcare Capital 1 Limited | Health & social care | 2019 |
| Belsize Healthcare Capital 2 Limited | Health & social care | 2019 |
| Belsize Healthcare EA Limited | Health & social care | 2020 |
| Belsize Healthcare Holdco Limited | Health & social care | 2023 |
| Belsize Healthcare HPH Limited | Health & social care | 2020 |
| Belsize Healthcare Investco 2 Limited | Health & social care | 2024 |
| Belsize Healthcare Investco Limited | Health & social care | 2023 |
| Belsize Healthcare Limited | Health & social care | 2019 |
| Belsize Opco Holdings Limited | Health & social care | 2025 |
| BEN Clifford Ltd | Construction | 2025 |
| BEN R G Limited | Hospitality | 2019 |
| Benchgroup Solution Ltd | Information & communication | 2019 |
| Bendelow Ltd | Professional & scientific | 2019 |
| Bendish Limited | Wholesale & retail | 2018 |
| Bendit Soft Limited | Information & communication | 2010 |
| Benifacts Accountants Ltd | Professional & scientific | 2015 |
| Benjamin Moore UK Limited | Wholesale & retail | 2015 |
| Benjys Ltd | Hospitality | 2018 |
| Benmiller Financial Services Ltd | Professional & scientific | 2012 |
| Benning & Sons Limited | Real estate | 2015 |
| Benning Investments Limited | Real estate | 2021 |
| Benqui Limited | Information & communication | 2009 |
| Benros Care Services Limited | Health & social care | 2014 |
| Bens Fuels Ltd | Wholesale & retail | 2017 |
| Benson and Co Homes Ltd | Real estate | 2025 |