| Beachcomber Technology Limited | Information & communication | 2009 |
| Beachwillow Limited | Real estate | 2004 |
| Beamish Blueprint Ltd | Wholesale & retail | 2025 |
| Beara Brewing and Fitness Limited | Manufacturing | 2022 |
| Bearn Real Estate Investments Limited | Real estate | 2000 |
| Beat School Uniforms.Co.Uk Limited | Wholesale & retail | 2006 |
| Beaufort and Cheyne Freehold Company Limited | Households | 1999 |
| Beaufort Law Ltd | Professional & scientific | 2023 |
| Beaumont Court Freehold Limited | Households | 2014 |
| Beaumont Court Management (RTM Company) Limited | Households | 2010 |
| Beauregard Productions Ltd | Information & communication | 2024 |
| Beaut Aesthetics Limited | Health & social care | 2021 |
| Beauty and the Yeast Ltd | Financial services | 2021 |
| Beauty by Jenu Ltd | Other services | 2022 |
| Beauty by Magdalena Limited | Construction | 2025 |
| Beauty for YOU Limited | Other services | 1974 |
| Beauty Globe Cosmetics Ltd | Wholesale & retail | 2024 |
| Beauty Thai Spa Ltd | Other services | 2021 |
| Beautybyralucaa Ltd | Other services | 2024 |
| Beautyessentialshub Limited | Wholesale & retail | 2024 |
| Beckenham Building Supplies Ltd | Manufacturing | 2010 |
| Beckett Place Management Limited | Households | 2012 |
| Bede Court Management Company Limited | Households | 2008 |
| Bedford Bearings Limited | Manufacturing | 1997 |
| Bedford Court Limited | Real estate | 1998 |
| Bedford Team UK Ltd | Wholesale & retail | 2021 |
| BEE Logistics Terminal LLP | | 2013 |
| BEE ZEE Limited | Other services | 2007 |
| Beech ROW Interior Design Ltd | Professional & scientific | 2025 |
| Beechcroft House Management Limited | Households | 1995 |
| Beeches (Trinder Road) Residents Association Limited(The) | Households | 1984 |
| Beechwood Management (Ealing) Ltd | Real estate | 2019 |
| Beechwood Rise Freehold Limited | Extraterritorial | 2008 |
| Beechwoodthree Limited | Real estate | 2024 |
| Beef King (Watford) Ltd | Hospitality | 2025 |
| Beegene Healthcare Limited | Health & social care | 2025 |
| Beeline Projects Limited | Professional & scientific | 2026 |
| Beeline Solutions Limited | Wholesale & retail | 2025 |
| Beeoptics Ltd | Health & social care | 2018 |
| Beep Training Ltd | Information & communication | 2021 |
| Bees-X Limited | Information & communication | 2021 |
| Beesante Ltd | Manufacturing | 2022 |
| Beetee Cleaning Limited | Administrative & support | 2026 |
| Beeveejay Ltd | Wholesale & retail | 1995 |
| Beewood Wardrobes Ltd | Manufacturing | 2020 |
| Beezee College Ltd | Education | 2019 |
| Beezee Marketing Solutions Ltd | Professional & scientific | 2013 |
| Befirst.One Limited | Professional & scientific | 2017 |
| Behan Consulting Limited | Professional & scientific | 2023 |
| Behindbras Fashion Academy CIC | Administrative & support | 2019 |
| Behram Properties Limited | Real estate | 2024 |
| Being Sure Ltd | Professional & scientific | 2015 |
| Beit Bunzl Limited | Real estate | 2025 |
| Beko PLC | Manufacturing | 1989 |
| Belgaum Medical Centre Ltd | Health & social care | 2013 |
| Belgrano Properties Ltd | Real estate | 2020 |
| Belgrave Land (Armley) Limited | Construction | 2004 |
| Belgrave Land (Chesterfield) Limited | Construction | 2003 |
| Belgrave Land (Kettering Autos) Limited | Construction | 2005 |
| Belgrave Land (Northern) NO 2 Limited | Construction | 2003 |
| Belgrave Land (Northfield Avenue) Limited | Construction | 1997 |
| Belgrave Land (Perth) Limited | Construction | 2005 |
| Belgrave Land (Sheffield) Limited | Real estate | 2008 |
| Belgrave Land (Southern) Limited | Construction | 1997 |
| Belgrave Land (Victoria Street) Limited | Construction | 2004 |
| Belgrave Land (Wigan) Limited | Construction | 2004 |
| Belgrave Land Investments Limited | Construction | 2006 |
| Belgrave Land Limited | Real estate | 2017 |
| Belgravia Private Wealth Management Ltd | Professional & scientific | 2017 |
| Belimo Automation UK Limited | Wholesale & retail | 1980 |
| Belinda Memmott Ltd | Health & social care | 2016 |
| Belizel Ltd | Construction | 2024 |
| Belko Ltd | Construction | 2016 |
| Belkor Bay Limited | Manufacturing | 2018 |
| Bell PUB Limited | Construction | 2018 |
| Bell Technology M&A, Fundraising and Financial Global Advisory Ltd | Financial services | 2020 |
| Bella Blackburne Design Limited | Professional & scientific | 2016 |
| Bellamy Flats Management Limited | Households | 1985 |
| Bellatrix Network Communication Limited | Information & communication | 2022 |
| Bellatrix T&T Ltd | Wholesale & retail | 2021 |
| Bellavi Ltd | Real estate | 2022 |
| Belle Bloom Ltd | Other services | 2025 |
| Belleville Pharmaceutical Services Ltd | Health & social care | 2022 |
| Bellgold Limited | Real estate | 1978 |
| Belli Fuori Ltd | Other services | 2013 |
| Bellingdon Flats Management Limited | Households | 1983 |
| Bellosoft Limited | Information & communication | 2019 |
| Bellottifightingtolighting Ltd | Construction | 2022 |
| Belmarco Limited | Construction | 2020 |
| Belmon Cosmetics Limited | Extraterritorial | 2005 |
| Belmont Technology Limited | Information & communication | 2001 |
| Belsize Park Gardens Limited | Real estate | 1983 |
| Belstone Homes Bushey Limited | Real estate | 2006 |
| Beltball International Ltd | Arts & recreation | 2023 |
| Belvedere Court Residents Company Limited | Professional & scientific | 2006 |
| Belvedere Eyecare Ltd | Health & social care | 2024 |
| Belvedere Property & Designs Limited | Real estate | 2009 |
| Belvia Bright Services Ltd | Administrative & support | 2024 |
| Belvoir Equity Funding Limited | Financial services | 1994 |
| Belxander Limited | Information & communication | 2010 |