| Berora Advisors Limited | Professional & scientific | 2006 |
| Berrington Place (Farncombe) Management Company Limited | Households | 2022 |
| Berrymist Limited | Real estate | 1999 |
| Bertiesoft Limited | Information & communication | 1996 |
| Berwyn Consultants Ltd | Professional & scientific | 2005 |
| Beryk Corporate Services Limited | Administrative & support | 1998 |
| Best Connect Limited | Wholesale & retail | 1997 |
| Bestbaron Limited | Construction | 1972 |
| Beta Product Works Ltd | Administrative & support | 2025 |
| Beta Systems Software Limited | Information & communication | 1987 |
| Beth-Ezra Trust | Health & social care | 1981 |
| Beyond Borders Limited | Administrative & support | 2004 |
| Beyond EAP Ltd | Administrative & support | 2014 |
| BGI Aviation Services UK LP | | 2013 |
| Bharati Ltd | Financial services | 1982 |
| Bhatti Financial Services Limited | Professional & scientific | 2003 |
| Bhbiz Consultants Ltd | Administrative & support | 1978 |
| Bhiemon Consultancy Limited | Professional & scientific | 2020 |
| Bhra Limited | Households | 2005 |
| Bhrs Worldwide Intermediaries Ltd | Financial services | 2005 |
| BIC Corporation Limited | Information & communication | 2005 |
| Bids Consulting Limited | Information & communication | 1997 |
| Big Brain Digital Ltd | Professional & scientific | 2022 |
| Big COD Pizza & Grill Ltd | Hospitality | 2024 |
| Big Yellow Self Storage Company 1 Limited | Financial services | 2002 |
| Big Yellow Self Storage Company 4 Limited | Financial services | 1999 |
| Bigfoot Media Limited | Administrative & support | 2006 |
| Bilham SOT Limited | Wholesale & retail | 1997 |
| Biltonmist Limited | Transport & logistics | 1983 |
| Biocharged Ltd | Health & social care | 2024 |
| Biohoc Group Ltd | Construction | 2021 |
| Birchgrove UK Limited | Real estate | 1999 |
| Birchwood Park Golf Centre Limited | Extraterritorial | 1997 |
| Bishop Properties Investments Ltd | Real estate | 2017 |
| Bishops House (Godalming) Management Company Limited | Professional & scientific | 2002 |
| Bishopsgate School Limited | Education | 1997 |
| Bisley Close Management Company Limited | Households | 1975 |
| Bissex Outfitters Limited | Wholesale & retail | 1959 |
| Bitcraft Limited | Information & communication | 2001 |
| Biters Croydon Limited | Hospitality | 2021 |
| Bitspec Limited | Information & communication | 1988 |
| Bitworks Limited | Information & communication | 2006 |
| Black Art Technologies Limited | Information & communication | 2007 |
| Black Horse Chauffeurs Ltd | Other services | 2025 |
| Blades Heating Limited | Construction | 1966 |
| Blaide Property Management Limited | Construction | 2001 |
| Blake 20 Ltd | Construction | 2022 |
| Blastair International Limited | | 1979 |
| Blitz Security Group | | 1997 |
| Blitz Security Limited | Administrative & support | 1996 |
| Blobcorp Limited | Households | 2004 |
| Blok Designs Ltd | Construction | 2003 |
| Bloomfields Service Stations Limited | Administrative & support | 1949 |
| Blue Mushroom Limited | Manufacturing | 2000 |
| Blue Properties Limited | Real estate | 2000 |
| Blue Sky Thinking Ltd | Real estate | 2002 |
| Blue Sky Tree Care Ltd | Administrative & support | 2013 |
| Bluefinity International Limited | Information & communication | 2005 |
| Blueprint Property Holdings Ltd | Real estate | 2023 |
| Blunight Enterprises Limited | Construction | 2022 |
| Bluntgate Limited | Households | 1987 |
| BMA Documentation Limited | Professional & scientific | 2000 |
| BMF Construction Limited | Wholesale & retail | 2006 |
| BMP Salfords Limited | Wholesale & retail | 2005 |
| BMS Victory Limited | Other services | 2001 |
| Boardcable Limited | Extraterritorial | 2004 |
| Bob.Britt Consultants Limited | Professional & scientific | 2003 |
| Bobkat Transport Limited | Professional & scientific | 2003 |
| Bodovi Ltd | Wholesale & retail | 2024 |
| BON Appetit Location Catering Limited | Hospitality | 2007 |
| Boogie Management Limited | Arts & recreation | 2006 |
| Bookspublication Ltd | Information & communication | 2025 |
| Boom Community Tennis CIC | Education | 2022 |
| Borahurst Limited | Construction | 1977 |
| Borahurst Trustee Company Limited | Administrative & support | 2023 |
| Borough Green Supplies Limited | Transport & logistics | 1988 |
| Bosco (UK) Limited | Manufacturing | 2008 |
| Botany Way Limited | Real estate | 2006 |
| Bourne Club,Limited(The) | Arts & recreation | 1923 |
| Bourne Estate Agents Limited | Real estate | 2005 |
| Bourne Press Limited | Professional & scientific | 1916 |
| Bower International Limited | Administrative & support | 2004 |
| Bowerland Limited | Wholesale & retail | 1997 |
| Bowerland Stone Limited | Construction | 2001 |
| Bowls Services (Tolworth) Limited | Arts & recreation | 1971 |
| Boyce Thornton Limited | Real estate | 1999 |
| Bpkat Trad Ltd | Wholesale & retail | 2024 |
| Bptak Trad Ltd | Wholesale & retail | 2024 |
| BR Golden Services Ltd | Real estate | 2020 |
| Brackendale Construction Limited | Construction | 2002 |
| Braes Mead (Hazyelm) Limited | Households | 2006 |
| Brambles (Ottershaw) NO. 2 Residents Company Limited(The) | Households | 1986 |
| Bramshott Residents Association Limited | Real estate | 1958 |
| Brand Steward Limited | Extraterritorial | 2007 |
| Brandis Limited | Professional & scientific | 2002 |
| Brass-Neck Enterprises Ltd | Information & communication | 2007 |
| Brassallied Limited | | 1998 |
| Bratza Limited | Construction | 2000 |
| Bredhurst Homes Limited | Real estate | 2001 |
| Breezeway Properties Ltd | Real estate | 2006 |