| Beck Racing Limited | Arts & recreation | 2023 |
| Beckles Medical Services Ltd | Health & social care | 2005 |
| Becksitch Lane Management Company Ltd | Households | 2025 |
| BEE & BO Limited | Professional & scientific | 2023 |
| BEE Clean Spaces Limited | Administrative & support | 2025 |
| BEE Strong Clothing Ltd | Extraterritorial | 2020 |
| BEE Strong Ltd | Extraterritorial | 2020 |
| BEE Strong MCR Ltd | Extraterritorial | 2020 |
| BEE Wise Trusted Trades Ltd | Professional & scientific | 2025 |
| Beech Court (Fallowfield Flats) Limited | Households | 1973 |
| Beech Hurst (1873) Management Co Ltd | Households | 1979 |
| Beeches (Bowdon) Management Limited(The) | Real estate | 1986 |
| Beechfields Management Limited | Extraterritorial | 2022 |
| Beechlawn Management (Altrincham) Limited | Households | 1985 |
| Beemtec Limited | Professional & scientific | 2016 |
| Beere Cloud Ltd | Extraterritorial | 2022 |
| Bees and Honey Consultancy Ltd | Administrative & support | 2019 |
| Beesley Bridge Consultants Limited | Professional & scientific | 2020 |
| Beew Limited | Wholesale & retail | 2025 |
| Beewisepaints Ltd | Manufacturing | 2023 |
| Behra & Behra Limited | Professional & scientific | 2023 |
| Beig Ltd | Education | 2013 |
| Bekitech Consultancy Limited | Professional & scientific | 1997 |
| Belattar Ltd | Health & social care | 2015 |
| Belgen Investco LLP | | 2017 |
| Belgian Bar & Restaurant Ltd | Hospitality | 2020 |
| Belgravia Holdings UK Limited | Professional & scientific | 1996 |
| Belgravia House (Hale) Management Limited | Households | 2002 |
| Belgravia Real Estate Properties Ltd | Real estate | 2021 |
| Bell Crew Ltd | Administrative & support | 2012 |
| Bell Field Limited | Households | 2004 |
| Bellco Limited | Wholesale & retail | 2014 |
| Belle Newco Limited | Information & communication | 2017 |
| Belle VUE Stud Ltd | Agriculture & fishing | 2021 |
| Bellevue Medical Solutions Limited | Manufacturing | 2024 |
| Bellino International Limited | Wholesale & retail | 1994 |
| Bellott Ltd. | Real estate | 2000 |
| Bells Commercial Services Limited | Professional & scientific | 2021 |
| Belmont Homes (GR) Limited | Construction | 2015 |
| Belmont Homes (HB) Limited | Construction | 2014 |
| Belmont Homes (North West) Limited | Construction | 2014 |
| Belmont Medical (UK) Holdings Limited | Financial services | 2018 |
| Belmont Medical Technologies Ltd | Other services | 2016 |
| Belmont Property Investments Limited | Real estate | 2016 |
| Belmont Ventures Limited | Professional & scientific | 2023 |
| Belora Ltd | Health & social care | 2025 |
| Belsize Consultancy Limited | Professional & scientific | 2021 |
| Beltodam Ltd | Education | 2008 |
| Bemis Associates UK Limited | Manufacturing | 1996 |
| BEN Appleyard Limited | Administrative & support | 2015 |
| BEN Wild Studios Limited | Arts & recreation | 2020 |
| Benedetto MCG Limited | Hospitality | 2019 |
| Benevolus Limited | Health & social care | 2023 |
| Benford Intellectual Property Limited | Information & communication | 2023 |
| Benginemedia Limited | Administrative & support | 2012 |
| Benjamin Samuel Taylor Limited | Administrative & support | 2011 |
| Benn Consultancy Limited | Information & communication | 2018 |
| Bennett Family Law Limited | Professional & scientific | 2020 |
| Benpigotttech Limited | Professional & scientific | 2025 |
| Bentham Solutions Limited | Professional & scientific | 2011 |
| Bentley Investments (Bowdon) Limited | Real estate | 2024 |
| Bentley Management & Consulting Limited | Administrative & support | 2014 |
| Benz Sarah Ryan Ltd | Public administration | 2018 |
| Beranger Property Services Limited | Hospitality | 2019 |
| Bereco Group Holdings Limited | Financial services | 2022 |
| Beresford Adams Limited | Professional & scientific | 1994 |
| Berkeley Accountancy Services Limited | Administrative & support | 2011 |
| Berkeley Resourcing Limited | Administrative & support | 2016 |
| Bern Haus Ltd | Arts & recreation | 2026 |
| Bernard King Limited | Construction | 2019 |
| Bertram Limited | Professional & scientific | 2018 |
| Bespoke Bridals Ltd | Other services | 2019 |
| Bespoke Dentures Ltd | Health & social care | 2024 |
| Bespoke Homes Group Ltd | Administrative & support | 2023 |
| Bespoke Inns (White Hart) Limited | Hospitality | 2009 |
| Bespoke Promotional Products Limited | Wholesale & retail | 2013 |
| Bespoke Solutions Dotnet Ltd | Information & communication | 2018 |
| Bespoke Workplace Solutions Limited | Hospitality | 2019 |
| Best at Home Adult Care Private Limited | Health & social care | 2016 |
| Best Consultancy Management Services Limited | Professional & scientific | 2020 |
| Best Discount Trading Ltd | Wholesale & retail | 2025 |
| Best of Suffolk Ltd | Hospitality | 2007 |
| Best Tailor Limited | Wholesale & retail | 2017 |
| Beswick Estate (City East) Management Limited | Households | 2007 |
| Beta Intelligence Limited | Information & communication | 2019 |
| Beth Richardson Orthodontics Ltd | Health & social care | 2013 |
| Better Dreams Ltd | Administrative & support | 2008 |
| Better Finance Ltd | Administrative & support | 2020 |
| Better Recruitment Services Limited | Administrative & support | 2015 |
| Better Sparkle Ltd | Water & waste | 2013 |
| Betts Consultants Ltd | Information & communication | 2011 |
| Bevan Consultants Group Ltd | Professional & scientific | 2024 |
| Bexbuild Developments Limited | Real estate | 1983 |
| Beyond Barriers CIC | Health & social care | 2020 |
| Beyond Barriers Psychology Ltd | Health & social care | 2019 |
| Beyond Car Hire Limited | Administrative & support | 2018 |
| Beyond Dark Limited | Manufacturing | 2024 |
| Beyond INT Consultancy Limited | Professional & scientific | 2023 |
| Beyond INT Ltd | Wholesale & retail | 2008 |
| Beyond International Ltd | Wholesale & retail | 2019 |