| Believe Change Management Consultancy Limited | Health & social care | 2014 |
| Bell & Associates Consulting Ltd | Professional & scientific | 2016 |
| Bell & Walker Groundworks Ltd | Construction | 2015 |
| Bell Bros. (Holdings) Limited | Professional & scientific | 2006 |
| Bell Bros. Settlement Limited | Extraterritorial | 2022 |
| Bell Bros.(Ashington)Limited | Real estate | 1942 |
| Bell Gibson Limited | Financial services | 2021 |
| Bell Motor Group Ltd | Wholesale & retail | 2018 |
| Bella Clothing Ltd | Wholesale & retail | 2022 |
| Bella Rose Flowers Ltd | Wholesale & retail | 2019 |
| BELLACARE19 Limited | Health & social care | 2025 |
| Belle Grove Estates Limited | Real estate | 1999 |
| Belle Grove Management Limited | Households | 2007 |
| Bellectrical Limited | Construction | 2017 |
| Bellefoodbydayurr Ltd | Hospitality | 2025 |
| Bellegrove Maintenance Limited | Professional & scientific | 1986 |
| Bellemark Ltd | Administrative & support | 2025 |
| Belleronuk Limited | Wholesale & retail | 2025 |
| Bellingham Craft Butchers Ltd | Manufacturing | 2016 |
| Bellmont Holdings Limited | Financial services | 2026 |
| Bellmont Management Services Limited | Other services | 2004 |
| Bello Newcastle Ltd | Hospitality | 2025 |
| Bells (Group Services) Limited | Transport & logistics | 1981 |
| Bells Holdings Group Ltd | Financial services | 2022 |
| Bellshiel Loch Choire Limited | Real estate | 2017 |
| Bellshill Bothy Limited | Real estate | 2023 |
| Bellsparkle Limited | Professional & scientific | 2004 |
| Bellway (Builders) Limited | Professional & scientific | 1946 |
| Bellway (Services) Limited | Administrative & support | 1964 |
| Bellway Financial Services Limited | Extraterritorial | 2011 |
| Bellway Home Space Limited | Construction | 2024 |
| Bellway Homes Limited | Construction | 1960 |
| Bellway Housing Trust Limited | Professional & scientific | 1930 |
| Bellway Joint Ventures Limited | Financial services | 2025 |
| Bellway Latimer Cherry Hinton LLP | | 2021 |
| Bellway London Limited | Extraterritorial | 2018 |
| Bellway P L C | Construction | 1978 |
| Bellway Properties Limited | Construction | 1983 |
| Bellway Trustee Company Limited | Professional & scientific | 1981 |
| Bellytops UK Limited | Other services | 2014 |
| Belmond &Co Claims Management Ltd | Professional & scientific | 2012 |
| Belmond Consultancy Limited | Professional & scientific | 2011 |
| Bels Flowers Styling Limited | Administrative & support | 2017 |
| Belsay Bridge Management Company Limited | Real estate | 2020 |
| Belsay Daycare Ltd | Education | 2007 |
| Belsay Estate LLP | | 2017 |
| Belsay Game Birds Limited | Agriculture & fishing | 2011 |
| Belsay Garage Limited | Wholesale & retail | 2020 |
| Belsay Shop Limited | Wholesale & retail | 2009 |
| Belsay Traders Ltd | Wholesale & retail | 2021 |
| Belt Technologies Europe Limited | Administrative & support | 2019 |
| Beluga Hairdressing Limited | Other services | 2004 |
| Beluga Seatech Ltd | Professional & scientific | 2019 |
| Belville 105 Ltd | Wholesale & retail | 2023 |
| Belville Consultancy Limited | Information & communication | 2017 |
| Bemco Limited | Wholesale & retail | 2025 |
| BEN Buys Houses Ltd | Real estate | 2016 |
| BEN Jackson Limited | Hospitality | 2026 |
| BEN Johnson Health Consultancy Ltd | Health & social care | 2023 |
| BEN Leighton Logistics Ltd | Transport & logistics | 2025 |
| BEN Melrose Garden Design Ltd | Administrative & support | 2023 |
| BEN Oliver Properties Limited | Administrative & support | 2021 |
| Benassi & Company Limited | Hospitality | 2013 |
| Benbecula Group Ltd | Financial services | 2016 |
| Bench Manor | Financial services | 2013 |
| Benedetti Logistics Ltd | Transport & logistics | 2025 |
| Benella Auto Electrical Services Limited | Wholesale & retail | 2003 |
| Benemi Properties Ltd | Real estate | 2023 |
| Benfield BED Centre Ltd | Wholesale & retail | 2024 |
| Benfield Football Club CIC | Arts & recreation | 2021 |
| Bengal Spice Newcastle Limited | Hospitality | 2023 |
| Benjamin Boutique Academy Ltd | Education | 2023 |
| Benjamin Grace Limited | Administrative & support | 2024 |
| Bennett Dental Limited | Health & social care | 2026 |
| Bennison Transport Limited | Transport & logistics | 2020 |
| Bens Direct Courier Ltd | Transport & logistics | 2023 |
| BENT2000 Ltd | Wholesale & retail | 2020 |
| Bentley Properties (UK) Limited | Real estate | 2013 |
| Bentobot Ltd | Information & communication | 2023 |
| Benton Auto Electrics Limited | Wholesale & retail | 2004 |
| Benton Auto Repairs Ltd | Wholesale & retail | 2021 |
| Benton Automotive Ltd | Wholesale & retail | 2025 |
| Benton Barbers Limited | Other services | 2017 |
| Benton Car Sales Limited | Real estate | 1961 |
| Benton Dene OUT of School Club CIC | Health & social care | 2025 |
| Benton Estates Ltd | Financial services | 2026 |
| Benton Pizza Ltd | Hospitality | 2025 |
| Benton Property Services Limited | Real estate | 2014 |
| Benton Road Barbers Ltd | Other services | 2025 |
| Benwell Bomber Limited | Real estate | 2019 |
| Benwell Films Ltd | Information & communication | 2022 |
| Benwell Halal Supermarket Limited | Wholesale & retail | 2024 |
| Benwell Hill Cricket Club C.I.C. | Arts & recreation | 2016 |
| Benwell Hill Limited | Arts & recreation | 2016 |
| Benwell Mini Market Limited | Hospitality | 2016 |
| Benwell Nails & Spa Ltd | Other services | 2026 |
| Benzali Ltd | Hospitality | 2022 |
| Beonhand Limited | Information & communication | 2019 |
| Berewood Estate Management Limited | Extraterritorial | 2017 |
| Bergamot Diagnostics Limited | Health & social care | 2021 |