| BDS Direct Ltd | Real estate | 2020 |
| BDS Haulage Ltd | Transport & logistics | 2021 |
| BDS Transport Ltd | Transport & logistics | 2026 |
| Bdsj Construction Limited | Construction | 2023 |
| BE Clean London Limited | Administrative & support | 2016 |
| BE Safety Supply Ltd | Wholesale & retail | 2021 |
| BEA Partners Ltd | Information & communication | 2025 |
| Beacon Traders Ltd | Wholesale & retail | 2023 |
| Beaconsfield Assets Ltd | Real estate | 2021 |
| Beam Knight Ltd | Administrative & support | 2026 |
| Beaulaser Clinic Limited | Other services | 2025 |
| Beauty Connection Ltd | Wholesale & retail | 2019 |
| Beautytrack Investments Ltd | Real estate | 2021 |
| Beautytrack Ltd | Manufacturing | 2014 |
| Bedford Stores Ltd | Wholesale & retail | 2021 |
| Bedi Supermarket Limited | Wholesale & retail | 2024 |
| Bedican Ltd | Information & communication | 2013 |
| BEE Beauty Salon Ltd | Other services | 2026 |
| BEE Smart Engineering Ltd | Construction | 2023 |
| Beech Life Ltd | Wholesale & retail | 2021 |
| Beeko Solutions Ltd | Information & communication | 2024 |
| Beep Beep CAB Ltd | Transport & logistics | 2022 |
| Beepflow Ltd | Information & communication | 2025 |
| Before the Grind Limited | Wholesale & retail | 2024 |
| Behind the Trowel Ltd | Information & communication | 2021 |
| Behl Properties Ltd | Real estate | 2017 |
| Beks Builders Ltd | Construction | 2019 |
| Beks Heating & Plumbing Ltd | Construction | 2025 |
| Belgrave Logistics Limited | Transport & logistics | 2006 |
| Bell Ross Estates Ltd | Construction | 2025 |
| Bellaplush Co Ltd | Wholesale & retail | 2021 |
| Bellisse Aesthetics Ltd | Other services | 2026 |
| Belman Enterprises Ltd | Professional & scientific | 2024 |
| Belverdere Investments Ltd | Real estate | 2019 |
| BEN Astro Group Ltd | Administrative & support | 2025 |
| Benastro Global CIC | Real estate | 2025 |
| Benibeck UK Limited | Wholesale & retail | 2009 |
| Benipal Holdings Ltd | Financial services | 2026 |
| Benipal Logistics Ltd | Transport & logistics | 2023 |
| Benipal Trading Ltd | Wholesale & retail | 2026 |
| Benlow Tenants Co. (Hayes) Limited | | 1966 |
| Benyamin Trading Ltd | Financial services | 2017 |
| Benz Chauffeur Ltd | Transport & logistics | 2023 |
| Benzene Corporation Limited | Information & communication | 2025 |
| Berggren PC Store Ltd | Wholesale & retail | 2026 |
| Berico Food Distribution Limited | Wholesale & retail | 2011 |
| Berico Food Services Ltd | Wholesale & retail | 2025 |
| Berkeley Finance Ltd | Financial services | 2018 |
| Berks Home Solutions Ltd | Construction | 2016 |
| Beryl House Limited | Real estate | 2023 |
| Beskar Holdings Ltd | Financial services | 2025 |
| Besleaga Scaffolding Ltd | Construction | 2025 |
| Bespoke Bedrooms & Kitchens Limited | Manufacturing | 2018 |
| Besso Construction Ltd | Construction | 2026 |
| Best Aluminium Systems Limited | Manufacturing | 2023 |
| Best Brands General Trading Ltd | Wholesale & retail | 2025 |
| Best Choice Trading Limited | Wholesale & retail | 2003 |
| Best Food and Wine Limited | Wholesale & retail | 2012 |
| Best Image Contractors Ltd | Construction | 2019 |
| Best Learning Support Limited | Education | 2015 |
| Best Mortgage Ltd | Financial services | 2015 |
| Best Peri Peri Chicken Hemel Ltd | Hospitality | 2026 |
| Best Picks Ltd | Wholesale & retail | 2025 |
| Best Price Glazing Limited | Construction | 2009 |
| Best Roofing Solutions Ltd | Construction | 2023 |
| Best Travel Deals Ltd | Other services | 2026 |
| Best Water Solution Ltd | Construction | 2025 |
| Best-Inclusive-Cleaning-Service Ltd | Administrative & support | 2019 |
| Bestbuilt Building Solutions Limited | Construction | 2024 |
| Bestco PVT Ltd | Real estate | 2025 |
| Bestway & Investments UK Ltd | Real estate | 2022 |
| Beta Freight Services Ltd | Transport & logistics | 2025 |
| Bethel Cars Ltd | Administrative & support | 2020 |
| Better One Ltd | Wholesale & retail | 2021 |
| Beuxy Consulting Ltd | Professional & scientific | 2021 |
| Beverage Junction Ltd | Wholesale & retail | 2024 |
| Bewas Ltd | Real estate | 2023 |
| Bexley Investment Ltd | Construction | 2015 |
| Beyond Accountancy Ltd | Professional & scientific | 2014 |
| Beyond Financials Limited | Professional & scientific | 2022 |
| BFA Accountants Limited | Professional & scientific | 2013 |
| BG Dhillon Limited | Transport & logistics | 2025 |
| BG Housing Ltd | Real estate | 2023 |
| BG-011 Ltd | Construction | 2018 |
| BH Asset Management Limited | Real estate | 2025 |
| Bhail Building Services Ltd | Construction | 2024 |
| Bhal Investment Properties Ltd | Real estate | 2013 |
| Bhambra Properties Ltd | Real estate | 2015 |
| Bhandal Transport Ltd | Transport & logistics | 2016 |
| Bhanot Limited | Hospitality | 2024 |
| Bhatti Transport UK Ltd | Transport & logistics | 2025 |
| Bhilla Family Limited | Wholesale & retail | 2024 |
| Bhilowal Properties Ltd | Real estate | 2021 |
| Bhinder Builders Ltd | Construction | 2020 |
| Bhogal Energy & Renewables Ltd | Construction | 2026 |
| Bhojnalay Ltd | Wholesale & retail | 2019 |
| BHP Supplier Limited | Wholesale & retail | 2025 |
| Bhullar Constructions Ltd | Construction | 2015 |
| Bhullar Logistics Ltd | Transport & logistics | 2016 |
| Bhullar Roofing Ltd | Construction | 2025 |