| Bechto Limited | Financial services | 2016 |
| Beckley's of Bookham Limited | Wholesale & retail | 1995 |
| Beckworth Place (Weybridge) Management Company Limited | Households | 1993 |
| Beechwood Residential Ltd | Real estate | 2009 |
| Beemarkt Limited | Administrative & support | 2014 |
| Beer & Young Limited | Professional & scientific | 1998 |
| Beers Wines & Spirits Limited | Wholesale & retail | 2006 |
| Before the OFF Ltd | Information & communication | 2015 |
| Beiverdi Ltd | Administrative & support | 2024 |
| Belgravia Security Holdings Limited | Financial services | 2009 |
| Belgravia Security Limited | Construction | 1989 |
| Bellevue London Ltd | Real estate | 2011 |
| Bellis & Sons Ltd | Extraterritorial | 2014 |
| Bellissima Days Ltd | Administrative & support | 2022 |
| Belmore Homes Ltd | Real estate | 2020 |
| Below the Shoulder Ltd | Wholesale & retail | 2025 |
| Belucent Limited | Professional & scientific | 2014 |
| BEN Tebbs Golf Professional Limited | Arts & recreation | 2016 |
| BEN Turner Limited | Professional & scientific | 1984 |
| Benutri Ltd | Wholesale & retail | 2025 |
| Bepar Ltd | Administrative & support | 2024 |
| Bergamot Consulting Limited | Professional & scientific | 2023 |
| Berkshire Homes Limited | Construction | 1997 |
| Bernau Estates LLP | | 2015 |
| Bespoke Build (Surrey) Ltd | Construction | 2020 |
| Best Electrical Installations Limited | Construction | 2011 |
| Best Gadgets Ltd | Wholesale & retail | 2018 |
| Best Parties Ever Limited | Extraterritorial | 2016 |
| Bestbikz UK Limited | Professional & scientific | 2016 |
| Better Than Paper Limited | Information & communication | 2009 |
| Bevan Property Limited | Real estate | 2024 |
| BG Hampshire Ltd | Hospitality | 2016 |
| Bhold Limited | Professional & scientific | 2013 |
| BID Recruitment Limited | Extraterritorial | 2019 |
| Big 5 Construction Ltd | Construction | 2018 |
| Big Blue Props Ltd | Information & communication | 2023 |
| Big Image Limited | Professional & scientific | 1994 |
| Big Image Photography Limited | Professional & scientific | 2015 |
| Big Screen Project Limited | Arts & recreation | 2026 |
| Big Shot Holdings Limited | Administrative & support | 2006 |
| Big Shot Productions Limited | Other services | 1991 |
| Big Spoon Brands Limited | Manufacturing | 2020 |
| Big Spoon Consulting Limited | Professional & scientific | 2021 |
| Big Spoon Limited | Real estate | 2018 |
| Big Spoon Property Limited | Real estate | 2022 |
| Big Three Property & Construction Limited | Real estate | 2023 |
| Bigfoot Learning Ltd | Administrative & support | 2016 |
| Bike Channel Limited | Professional & scientific | 2007 |
| Bike ME Around Limited | Administrative & support | 2025 |
| Bilbao Holdings Limited | Energy | 2024 |
| Bioexport Products Limited | Professional & scientific | 2009 |
| Biofloratech Ltd | Wholesale & retail | 2015 |
| Biomed Limited | Wholesale & retail | 1997 |
| Birch Grove Chalfont Management Limited | Households | 2023 |
| Birchwood Commercial Ltd | Real estate | 2001 |
| Birchwood Esher One Ltd | Extraterritorial | 2020 |
| Birchwood Esher Three Ltd | Extraterritorial | 2020 |
| Birchwood Esher Two Ltd | Extraterritorial | 2020 |
| Birchwood Homes (Esher) Limited | Construction | 2018 |
| Birchwood Homes Limited | Real estate | 1996 |
| Birchwood Road (Poole) Limited | Construction | 2018 |
| Bircroft Private Ltd | Financial services | 2009 |
| Bishop Search and Selection Ltd | Administrative & support | 2012 |
| Bishops Management Services Limited | Construction | 2023 |
| Bixbite BN Ltd | Hospitality | 2021 |
| Bixbite RG Ltd | Hospitality | 2020 |
| Black and White Digital Ltd | Information & communication | 2016 |
| Black and White Trading Ltd | Information & communication | 2011 |
| Black Forth 1 Limited | Construction | 2024 |
| Black Forth 2 Limited | Construction | 2024 |
| Black Forth 3 Limited | Construction | 2025 |
| Black Forth 4 Limited | Construction | 2025 |
| Black Forth 5 Limited | Construction | 2025 |
| Black PIG Investments Limited | Financial services | 2021 |
| Black Salamander Studios Ltd | Information & communication | 2025 |
| Blacksmiths Selsey Ltd | Real estate | 2021 |
| Blackthorn Energy Limited | Energy | 2020 |
| Blair Court Freehold Limited | Real estate | 2003 |
| Bling London Limited | Manufacturing | 2025 |
| Bloc Commercial Interiors Limited | Construction | 2017 |
| Bloodstock Media Limited | Other services | 2005 |
| Bloom Doctors Limited | Health & social care | 2025 |
| Bloomday Limited | Wholesale & retail | 2026 |
| Blossom and Berry Training Limited | Education | 2020 |
| BLP Waste Removal Services Ltd | Water & waste | 2022 |
| BLU Kube Contractors Limited | Construction | 2024 |
| Blue Begonia Ltd | Other services | 2017 |
| Blue Cloud Aviation Limited | Other services | 2024 |
| Blue Fairway Limited | Wholesale & retail | 2013 |
| Blue Forge Media Ltd | Professional & scientific | 2011 |
| Blue Logica Project Management Consultants Ltd | Professional & scientific | 2023 |
| Blue Media Group Limited | Arts & recreation | 1989 |
| Blue Mentality Limited | Extraterritorial | 2017 |
| Blue Mesh Solutions Limited | Manufacturing | 2020 |
| Blue Ocean Associates Limited | Extraterritorial | 2017 |
| Blue Ocean Weybridge Ltd | Hospitality | 2024 |
| Blue Shutters Limited | Other services | 2020 |
| BLUE24 Contracts Limited | Construction | 2024 |
| Bluebell 33 Ltd | Information & communication | 2003 |
| Bluecell Group Limited | Professional & scientific | 2001 |