| Bentley Operations Consultancy Ltd | Professional & scientific | 2024 |
| Bentley Property Renovations Ltd | Construction | 2026 |
| Bentley Residential Letting Ltd | Households | 2010 |
| Bentley Wedding Cars 2020 Ltd | Other services | 2024 |
| Benton Bros. Real Estate Holdings Ltd | Real estate | 2025 |
| Bentree Services Limited | Administrative & support | 2025 |
| Benz Bakery Ltd | Hospitality | 2025 |
| Benz Collective Limited | Arts & recreation | 2024 |
| Benz Food MCR Limited | Hospitality | 2025 |
| Benzest Properties Ltd | Real estate | 2023 |
| Beowulf Performance Products Limited | Manufacturing | 2003 |
| BEP Holdings Limited | Extraterritorial | 2008 |
| BEP Surface Technologies Limited | Manufacturing | 1978 |
| BEP Technologies Limited | Financial services | 2012 |
| Bepioneer Limited | Wholesale & retail | 2011 |
| BEQ Ltd | Wholesale & retail | 2023 |
| BEQ Properties Ltd | Real estate | 2021 |
| BEQ Properties V1 Ltd | Real estate | 2022 |
| BEQ Properties V3 Ltd | Real estate | 2026 |
| Bequia Property Services Ltd | Construction | 2019 |
| BER Transport Ltd | Transport & logistics | 2022 |
| Berachan Incorporation Ltd | Financial services | 2013 |
| Berbiche Brothers Ltd | Manufacturing | 2025 |
| Berbish Ltd | Manufacturing | 2022 |
| Beready Group Limited | Information & communication | 2014 |
| Bereavement Advice Centre | Health & social care | 2006 |
| Bereldexter Limited | Professional & scientific | 2018 |
| Beresford Court Limited | Households | 1971 |
| Beresford's Property Solutions Limited | Construction | 2023 |
| Berg Advisory Services Ltd | Professional & scientific | 2017 |
| Berg Corporate Advisory Ltd | Administrative & support | 2025 |
| Berg Store Limited | Wholesale & retail | 2026 |
| Bergatt Properties Limited | Real estate | 2024 |
| Bergen Capital Management Limited | Professional & scientific | 2011 |
| Bergen Transport (Holdings) Limited | Extraterritorial | 1979 |
| Berger Estates Ltd | Real estate | 2021 |
| Bergstein Ltd | Administrative & support | 2020 |
| Bergz Engineering Ltd | Manufacturing | 2019 |
| Beri Community Greater Manchester Ltd | Other services | 2021 |
| Bericorp Ltd | Wholesale & retail | 2017 |
| Beringer Holdings, LLP | | 2026 |
| Berkel Productions Limited | Administrative & support | 2024 |
| Berkeley Construction Services (UK) Limited | Construction | 2011 |
| Berkeley Foundation Limited | Administrative & support | 2007 |
| Berkeley House Property Management Limited | Households | 2016 |
| Berkeley Morgan Fullerton Limited | Real estate | 2011 |
| Berkeley Square Support Services Ltd | Administrative & support | 2019 |
| Berkeley Street (HH) Limited | Real estate | 2021 |
| Berkeley Towers Residents Company Limited | Households | 2006 |
| Berkley Heath Ltd | Professional & scientific | 2022 |
| Berkley Oak Ltd | Manufacturing | 2015 |
| Berko Projects Limited | Hospitality | 2021 |
| Berkshire Benson Limited | Hospitality | 2014 |
| Berkshire Commerce Ltd | Wholesale & retail | 2025 |
| Berkshire HLC Ltd | Other services | 2022 |
| Berleon Estates Limited | Professional & scientific | 1988 |
| Berlin Holdings 1 LP | | 2018 |
| Berlin Holdings 2 LP | | 2019 |
| Berlin Holdings 3 LP | | 2019 |
| Berlin International Logistik and Service Ltd. | Professional & scientific | 2004 |
| Berlyne Bailey & Company Limited | Real estate | 1989 |
| Berman & Co.Limited | Transport & logistics | 1969 |
| Berman Construction Ltd | Construction | 2023 |
| Bermin Investments Limited | Real estate | 1959 |
| Bernadem Ltd | Health & social care | 2017 |
| Bernadette Delaney Photography Limited | Professional & scientific | 2018 |
| Bernard Flowers & Company Limited | Real estate | 1996 |
| Bernard Sheridan Consultancy Limited | Professional & scientific | 2017 |
| Bernard Stott (Decorators) Limited | Arts & recreation | 1962 |
| Bernardi Ports Ltd | Wholesale & retail | 2025 |
| Bernice Consulting Limited | Health & social care | 2013 |
| Bernie Ryan Consultant Ltd | Health & social care | 2017 |
| Bernies Workshop Limited | Manufacturing | 2025 |
| Berods UK Limited | Health & social care | 2014 |
| Berozan for Wholesale and Retail Trading Ltd | Wholesale & retail | 2026 |
| Berridon Engineering Services Limited | | 1977 |
| Berrob Estates Ltd | Real estate | 2021 |
| Berry Electrical Services (UK) Ltd | Construction | 2018 |
| Berry Systems UK Limited | Construction | 2023 |
| Berry's Limited | Wholesale & retail | 2004 |
| Berrybitezz Ltd | Hospitality | 2024 |
| Berrys of Unsworth Limited | Wholesale & retail | 2014 |
| Berrytown Properties Ltd | Real estate | 2019 |
| Bershuv Estates Ltd | Real estate | 2025 |
| Bersu Property Ltd | Real estate | 2025 |
| Bert Malm Ltd | Wholesale & retail | 2025 |
| Bertenshaw Ltd | Information & communication | 2023 |
| Bertenshaw Software Consultancy Ltd | Information & communication | 2017 |
| Bertey Ltd | Information & communication | 2010 |
| BERTIES25 Ltd | Hospitality | 2025 |
| Bertman Limited | Real estate | 2025 |
| Bertscap | Professional & scientific | 2026 |
| Berwick Care Supplies Ltd | Health & social care | 2020 |
| Beryl Legal Limited | Information & communication | 2018 |
| Beryl Ventures Limited | Information & communication | 2018 |
| Beryllium I GP Limited | Financial services | 2020 |
| Beryllium I Investing UK LP | | 2020 |
| Beryllium II GP Limited | Financial services | 2020 |
| Beryllium II Investing UK LP | | 2020 |
| BES Group Limited | Education | 2017 |