| Beale's Property Maintenance Ltd | Construction | 2003 |
| Beam Virtual Property Support Ltd | Administrative & support | 2022 |
| Bear Corporations Ltd | Real estate | 2017 |
| Bear Enterprise Properties Ltd | Real estate | 2018 |
| Bear Media Group Ltd | Information & communication | 2020 |
| Beardsley Consultants Limited | Professional & scientific | 2006 |
| Beardwell Construction Limited | Construction | 1986 |
| Bearer Limited | Real estate | 2026 |
| Bears Lane (Lavenham) Management Company Limited | Households | 2018 |
| Beatbush Fencing Ltd | Manufacturing | 2018 |
| Beats Catering Ltd | Hospitality | 2021 |
| Beaufort Place Management Company Limited | Households | 2005 |
| Beaulieu Barns Ltd | Real estate | 2021 |
| Beaulieu Radiology Limited | Health & social care | 2023 |
| Beaumont Seymour Limited | Professional & scientific | 2009 |
| Beautiful YOU Aesthetics Ltd | Other services | 2021 |
| Beauty at the Uber Ltd | Other services | 2018 |
| Beauty by Bina Ltd | Other services | 2025 |
| Beauty by Rebecca Ltd | Other services | 2013 |
| Beauty by Scarlett Ltd | Other services | 2025 |
| Beauty in the Bottle Ltd | Other services | 2023 |
| Beaver Lodge Prints Limited | Manufacturing | 2003 |
| Beavutha Limited | Health & social care | 2020 |
| Bebane Ltd | Health & social care | 2018 |
| BEC Consultancy UK Ltd | Administrative & support | 2016 |
| Beck Plumbing Services Ltd | Construction | 2007 |
| Beckett Consulting Limited | Professional & scientific | 2023 |
| Beckett Legal Limited | Administrative & support | 2008 |
| Becton Detailing Ltd | Wholesale & retail | 2025 |
| Becton Detailing Supplies Ltd | Wholesale & retail | 2022 |
| BED in a BAG Ltd | Administrative & support | 2021 |
| BED in a Box Ltd | Administrative & support | 2021 |
| Bedfont Estates Limited | Professional & scientific | 1935 |
| Bedrock Power Solutions Limited | Manufacturing | 2026 |
| BEE UN Limited | Education | 2025 |
| Beech International Limited | Financial services | 2000 |
| Beechall and Sons Consultancy and Building Services Ltd | Construction | 2017 |
| Beechrose Properties Limited | Administrative & support | 2002 |
| Beehive Road Limited | Real estate | 2015 |
| Beer Tent Ltd | Wholesale & retail | 2017 |
| Beerfantastic Ltd | Wholesale & retail | 2010 |
| Bees Tandoori Grill Ltd | Hospitality | 2024 |
| Behari Property Limited | Real estate | 2017 |
| Behind the Scenes Ltd | Wholesale & retail | 2011 |
| BEI Capelli Hair Company Ltd | Other services | 2014 |
| BEL Book Support Ltd | Professional & scientific | 2025 |
| Belforts Construction Ltd | Construction | 2014 |
| Belgrave Place (Freehold) Company Limited | Households | 2008 |
| Belgrave Place Management Company Limited | Households | 2007 |
| Belias Limited | Administrative & support | 2014 |
| Believe World Limited | Information & communication | 2024 |
| Belingual Ltd | Education | 2022 |
| Bell Green (Brightlingsea) Management Company Limited | Real estate | 1990 |
| Bell Mead Heights Management Company Limited | Professional & scientific | 2018 |
| Bell Yard Retail Ltd | Wholesale & retail | 2020 |
| Bellapais Restaurant Ltd | Hospitality | 2019 |
| Bellavida Studios Ltd | Information & communication | 2026 |
| Bellfords Mechanical Ltd | Construction | 2022 |
| Bellhouse GAS Services Ltd | Construction | 2015 |
| Bellsham Hall Consulting Ltd | Professional & scientific | 2023 |
| Bellstar Management Limited | Real estate | 1999 |
| Bellwest Ltd | Construction | 2011 |
| Belmont Maintenance Company Limited | Other services | 1988 |
| Belmont Place Residence Limited | Administrative & support | 1989 |
| Belmont Roofing & Cladding Limited | Construction | 2023 |
| Belmont Roofing (Holdings) Limited | Professional & scientific | 2002 |
| Belmont Roofing Group Holdings Limited | Construction | 2022 |
| Belmont Roofing Limited | Construction | 1986 |
| Beloved LDN Ltd | Wholesale & retail | 2024 |
| Belroy Ltd | Extraterritorial | 2008 |
| Belwether Consulting Ltd | Information & communication | 2010 |
| Belwether Properties Ltd | Real estate | 2019 |
| Belwood Foods Limited | Wholesale & retail | 1961 |
| BEN and Bill's Ltd | Manufacturing | 2009 |
| BEN Johnstone Consulting Limited | Professional & scientific | 2014 |
| BEN Molony Consulting Ltd | Professional & scientific | 2024 |
| BEN Sainty Court Limited | Real estate | 1998 |
| BEN Segeth Associates Limited | Professional & scientific | 2012 |
| BEN Smith Holdings Limited | Financial services | 2024 |
| BEN Thorns Limited | Information & communication | 2004 |
| BEN Wood Contracts Limited | Construction | 2023 |
| Ben's Fish Limited | Wholesale & retail | 2006 |
| Benark Tech Limited | Real estate | 2023 |
| Benbow Court (Orwell Green) Residents Association Limited | Households | 1990 |
| Benediction Property Management Ltd | Real estate | 2023 |
| Benems Carpet & Suite Centre Ltd | Wholesale & retail | 2001 |
| Benems Limited | Wholesale & retail | 2001 |
| Benevolence Global Limited | Other services | 2020 |
| Beniwal S Care Services Ltd | Health & social care | 2026 |
| Benjamin Austin Consulting Ltd | Professional & scientific | 2023 |
| Benjamin Charles Hair Limited | Other services | 2010 |
| Benjamin Holdings Ltd | Financial services | 2025 |
| Benjamin T Sands Carpenters and Builders Ltd | Construction | 2010 |
| Benji Shaw Ltd | Administrative & support | 2015 |
| Bennell Properties Ltd | Real estate | 2022 |
| Bennett & Co Investments Limited | Financial services | 2018 |
| Bennett Aerials Limited | Wholesale & retail | 1961 |
| Bennett Jones Construction Ltd | Construction | 2024 |
| Bennett Therapy Limited | Health & social care | 2018 |
| Bennett's Aerials Limited | Information & communication | 2012 |