| BEE Sweets Ltd | Construction | 2022 |
| Bee-Utifulgifts&More Limited | Wholesale & retail | 2022 |
| Beech Avenue 7 Limited | Real estate | 2022 |
| Beeches Management Co. (Ashvale) Limited(The) | Households | 1986 |
| Beehive HR Solutions Limited | Administrative & support | 2015 |
| Bega Rentals Limited | Transport & logistics | 2024 |
| Begley International Limited | Transport & logistics | 2018 |
| Behindagroove Ltd | Arts & recreation | 2017 |
| Bejoyful Consulting Limited | Health & social care | 2016 |
| BEJUSTFAB1 Limited | Wholesale & retail | 2018 |
| Beldent Ltd | Health & social care | 2021 |
| Belfrey Management Limited | Households | 1988 |
| Belgieco Import Ltd | Wholesale & retail | 2024 |
| Belgrave Court (Shooters Hill Road) Limited | Households | 1973 |
| Bell N Tell Electronics Ltd | Wholesale & retail | 2013 |
| Bell Security Systems Limited | Administrative & support | 2010 |
| Bella Maris Services Ltd | Health & social care | 2024 |
| Bella Rosa Properties Ltd | Real estate | 2021 |
| Bella's Property Ltd | Real estate | 2020 |
| Bella’S Medicals Limited | Health & social care | 2018 |
| Bellezza Services UK Limited | Health & social care | 2016 |
| Bello Skin Ltd | Other services | 2024 |
| Bellsik Subsea Limited | Professional & scientific | 2021 |
| Beloveth Outreach Limited | Education | 2022 |
| Beltan Trading Ltd | Hospitality | 2018 |
| BEN Aldridge Coaching Limited | Other services | 2018 |
| BEN S Scott Ltd | Real estate | 2023 |
| Ben-Jem Healthward Ltd | Health & social care | 2023 |
| Benaiah Ltd | Health & social care | 2022 |
| Bengoul Handcraft Corner Limited | Manufacturing | 2024 |
| Beniport Limited | Other services | 1995 |
| Benjamin Court (Rainham) Limited | Households | 2017 |
| Benjamin Griffin Limited | Health & social care | 2024 |
| Benoli 21 Ltd | Transport & logistics | 2021 |
| Benson Healthcare Ltd | Health & social care | 2017 |
| Benttonvilles International Limited | Professional & scientific | 2000 |
| Benzid Property Ltd | Real estate | 2022 |
| BEP Consulting Limited | Information & communication | 2014 |
| Berich Property Services Limited | Manufacturing | 2022 |
| Berit Enterprises Ltd | Health & social care | 2026 |
| Berkeley Data Strategists Limited | Professional & scientific | 2018 |
| Berla Transport Ltd | Transport & logistics | 2022 |
| Berry Acres (Paignton) Management Company Limited | Real estate | 2019 |
| Bertandflo Ltd | Professional & scientific | 2019 |
| Bertoni Services Limited | Construction | 2007 |
| Beru Ltd | Transport & logistics | 2018 |
| Berwick Court Management Limited | Households | 1999 |
| Beryl Group Limited | Administrative & support | 2023 |
| Beryl Services Ltd | Wholesale & retail | 2020 |
| Besafe Care Limited | Health & social care | 2023 |
| Bespoke Built in Furniture Ltd | Manufacturing | 2017 |
| Bespoke Car Services Ltd | Wholesale & retail | 2002 |
| Bespoke Electrical & Maintenance Limited | Extraterritorial | 2022 |
| Bespoke Estimating Services Limited | Professional & scientific | 2024 |
| Bespoke Finishes and Repairs Ltd | Manufacturing | 2021 |
| Bespoke Furniture Installations Limited | Construction | 2016 |
| Bespoke Network Services Ltd. | Construction | 2018 |
| Bespoke Work Surfaces Ltd | Manufacturing | 2017 |
| Best Beauty Laser Essex Limited | Other services | 2026 |
| Best Bride Beauty Ltd | Wholesale & retail | 2023 |
| Best FIX Roofing Services Ltd | Construction | 2025 |
| Best FLOOR2FLOORS Ltd | Construction | 2021 |
| Best Property Rentals Limited | Real estate | 2025 |
| Best Value Ltd | Health & social care | 2015 |
| Bestlane Ltd | Construction | 2020 |
| Bestleks Ltd | Health & social care | 2020 |
| Bestwayz Ltd | Wholesale & retail | 2020 |
| Beswick (Block B) Management Company Limited | Households | 2007 |
| Beswick (Block C) Management Company Limited | Households | 2007 |
| Beta Locum Services Ltd | Administrative & support | 2020 |
| Beta Service & Maintenance Ltd | Other services | 2019 |
| Bethel Builders Limited | Construction | 2024 |
| Betheluxe Limited | Health & social care | 2024 |
| Betini Limited | Information & communication | 2024 |
| Better Future Limited | Education | 2017 |
| Bettham Ltd | Households | 2019 |
| Beverley Fidgeon Real Estate Limited | Real estate | 2024 |
| Bevon Burke Ltd. | Information & communication | 2014 |
| Beyond Beauty Hertford Ltd | Other services | 2023 |
| Beyond Today Ltd | Professional & scientific | 2019 |
| BF Healthcare Solutions Limited | Health & social care | 2015 |
| BFK Hall Ltd | Health & social care | 2019 |
| BFP Ltd | Public administration | 2015 |
| BG & Co (London) Limited | Extraterritorial | 2015 |
| BG Accounting Limited | Professional & scientific | 2018 |
| BG Gold Fish Limited | Other services | 2016 |
| BG Hygienic Solutions Ltd | Construction | 2024 |
| BG Property Limited | Other services | 2016 |
| BG Trapeza Ltd | Wholesale & retail | 2018 |
| Bgmroofing Ltd | Construction | 2025 |
| BGU Trans Ltd | Transport & logistics | 2018 |
| BHA Project Solutions Limited | Professional & scientific | 2022 |
| Bhagedorn Enterprise Limited | Health & social care | 2022 |
| Bhan Trading and Investment Limited | Administrative & support | 2020 |
| Bhanwood Properties Limited | Real estate | 2023 |
| Bhawacare Solutions Consultancy Limited | Health & social care | 2021 |
| Bhowmick Limited | Health & social care | 2012 |
| Bifa Associates Ltd | Real estate | 2022 |
| Bifaan Ltd | Professional & scientific | 2020 |
| Biffboffvapes Ltd | Wholesale & retail | 2021 |