| Bluehold Director Ltd | Professional & scientific | 2020 |
| Bluelaurel Limited | Financial services | 2003 |
| Bluelight Consumer Services Limited | Professional & scientific | 2014 |
| Bluesun Consumers Brands Ltd | Wholesale & retail | 2024 |
| Blueview Consulting Limited | Administrative & support | 2019 |
| Bluu Square Moores Road LLP | | 2022 |
| Blyth Painting Services Ltd | Construction | 2023 |
| BM Podiatry Ltd | Health & social care | 2025 |
| BMS Capital Solutions Limited | Wholesale & retail | 2018 |
| BMS Performance Limited | Administrative & support | 2017 |
| BMS Secondbody Ltd | Financial services | 2025 |
| Boardelta Limited | Professional & scientific | 2014 |
| Boast Plumbing Supplies Limited | Wholesale & retail | 1976 |
| Bodd Limited | Administrative & support | 2022 |
| Bodiam Capital Ltd. | Financial services | 2017 |
| Bodmin Jail Spirits Limited | Manufacturing | 2026 |
| Boissevain Web LAB Ltd | Information & communication | 2018 |
| Bolivar Corporation UK Limited | Administrative & support | 2023 |
| Bomboni Ltd | Hospitality | 2021 |
| Boncee Ltd | Wholesale & retail | 2019 |
| Boncho People Ltd | Wholesale & retail | 2025 |
| Bond Clarke Limited | Professional & scientific | 2011 |
| Bonham Developments Limited | Other services | 2015 |
| Bonham Property Limited | Other services | 2013 |
| Bonniedoon Investments Limited | Real estate | 2025 |
| Booby Buckets Ltd | Wholesale & retail | 2020 |
| Bookhouse Films Limited | Information & communication | 2017 |
| Bookify Tech Solutions Ltd | Information & communication | 2022 |
| Bookrants Limited | Extraterritorial | 2008 |
| Boorman Group Ltd | Construction | 2020 |
| Boost Homes Ltd | Construction | 2011 |
| Boost Homes Property Management Ltd | Real estate | 2015 |
| Borch Associates Limited | Administrative & support | 1994 |
| Bose Associates Limited | Professional & scientific | 2019 |
| Boudene Consulting Ltd | Construction | 2026 |
| Bounce Medical Communications Ltd | Professional & scientific | 2024 |
| Bourne Court Byfleet Limited | Households | 2016 |
| Bourne Database Services Limited | Information & communication | 2002 |
| Bourse ML Ltd | Construction | 2019 |
| Boutique Camping Supplies Ltd | Wholesale & retail | 2010 |
| Bowdun Offshore Wind Farm Limited | Construction | 2022 |
| Bowerbird Developments Limited | Construction | 2019 |
| Bowman Energy Consulting Limited | Professional & scientific | 2019 |
| Bowman Properties Limited | Real estate | 2022 |
| Boxacre Finance Limited | Construction | 1975 |
| BP Culinary Ventures Ltd | Manufacturing | 2026 |
| BPI London Limited | Professional & scientific | 2021 |
| BPR Resourcing Limited | Administrative & support | 2014 |
| BPR Trade LP | | 2022 |
| Bracken Homes Ltd | Households | 2018 |
| Brackenbury Village Estate Limited | Real estate | 2020 |
| Brackenhurst (Weybridge) Limited | Households | 2006 |
| Bracknell Fencing Ltd | Construction | 2024 |
| Brainspot Limited | Construction | 2025 |
| Branching OUT Surrey Ltd | Administrative & support | 2022 |
| Brand Frontier Group Limited | Professional & scientific | 2001 |
| Brandesign Ltd | Professional & scientific | 2021 |
| Brandgaard Recruitment Limited | Administrative & support | 2015 |
| Bratley Limited | Real estate | 2021 |
| Bravequest Group Limited | Professional & scientific | 2002 |
| Bravequest Limited | Professional & scientific | 1989 |
| Bravequest Modus Operandi Limited | Professional & scientific | 2002 |
| Bravex Education Ltd | Education | 2026 |
| Bray Lodge Limited | Real estate | 2015 |
| Brencole LLP | | 2012 |
| Breton Crust Limited | Extraterritorial | 2010 |
| Bric Group Ltd | Information & communication | 2007 |
| Bric Investments Ltd | Information & communication | 2011 |
| Bricat Limited | Professional & scientific | 2004 |
| Bridge Media & Advertising Ltd | Information & communication | 2024 |
| Bridge Southern Developments Limited | Real estate | 1999 |
| Bridgedale Limited | Extraterritorial | 2018 |
| Bridgemore Land and Development Ltd | Construction | 2022 |
| Bridgescene Limited | Financial services | 2012 |
| Bridging & Commercial Finance Limited | Financial services | 2026 |
| Bright Ideas for Tennis | Arts & recreation | 2016 |
| Bright Marketing and Educational Services Ltd | Professional & scientific | 2017 |
| Bright Slate Ltd | Administrative & support | 2021 |
| Brighthampton (Weybridge) Residents Association Limited | Households | 1966 |
| Brightsign Digital Limited | Information & communication | 2005 |
| Brimson Mews Management Company Limited | Real estate | 2005 |
| Brindley Services Ltd | Manufacturing | 2021 |
| Briqs Studio Limited | Professional & scientific | 2023 |
| Bristol Mining Ltd | Mining & quarrying | 2016 |
| Brit Holdings Limited | Extraterritorial | 2015 |
| Britannia Photographic Limited | Real estate | 1988 |
| Britannia ROW Productions Limited | Administrative & support | 1984 |
| Britannia ROW Productions Training Limited | Other services | 2012 |
| Britflick Films Limited | Information & communication | 2021 |
| British Ceremonial Arts Limited | Information & communication | 1989 |
| Britlex UK Ltd | Health & social care | 2025 |
| Brix Development (Surbiton Hill) Limited | Construction | 2018 |
| Brixnwata Limited | Extraterritorial | 2011 |
| BRN Coffee Ltd | Hospitality | 2026 |
| Brnd Ltd | Professional & scientific | 2012 |
| Broad Water Park Management Company Limited | Households | 1976 |
| Broadband Connections Limited | Information & communication | 2002 |
| Broadlands Property Management Company Ltd | Households | 2018 |
| Broadpen Limited | Real estate | 2012 |
| Broadview Construction Limited | Construction | 2017 |