| Beekeeping Supplies UK Ltd | Wholesale & retail | 2019 |
| Belgravia Trading Services Ltd | Administrative & support | 2018 |
| Bell & Beach Limited | Professional & scientific | 2014 |
| Belle Aesthetic Clinic Ltd | Health & social care | 2018 |
| Benbridge Electrical Ltd | Construction | 2025 |
| Bennison LEE Brickwork Limited | Construction | 2024 |
| Beqa Limited | Administrative & support | 2022 |
| Beres Art Limited | Manufacturing | 2018 |
| Berlain Limited | Administrative & support | 2015 |
| Berntsen Consulting Limited | Professional & scientific | 2010 |
| Berntsenrose Ltd | Other services | 2024 |
| Besco Wholesale Ltd | Wholesale & retail | 2017 |
| Bespoke Kitchens & Home Interiors Limited | Professional & scientific | 2017 |
| Bespoqa Ltd | Construction | 2023 |
| Best Ditton Kebab & Grill Ltd | Hospitality | 2026 |
| Betz Holdings Limited | Real estate | 2026 |
| Betz Limited | Real estate | 1998 |
| Bexrated Group Ltd | Financial services | 2026 |
| Bexrated Lifestyle Ltd | Construction | 2026 |
| Bexrated Ltd | Wholesale & retail | 2026 |
| Bhcc Property Limited | Real estate | 2015 |
| Bicknor Wood Residents Community Group Ltd | Agriculture & fishing | 2020 |
| Biggin Street Residences Ltd | Real estate | 2021 |
| Bilford Investments Limited | Administrative & support | 2003 |
| Bilklin Global Consults Ltd | Information & communication | 2023 |
| Billing.Social Ltd | Information & communication | 2015 |
| Bimac Limited | Administrative & support | 1998 |
| Bishops Services Limited | Construction | 1989 |
| Bishopsgate Consulting Limited | Professional & scientific | 2007 |
| Bison Consultants Ltd | Administrative & support | 2015 |
| BJ Burns Consulting Ltd | Professional & scientific | 2023 |
| Black Box Smart Data LLP | | 2009 |
| Black Saucers Ltd | Administrative & support | 2021 |
| Black Tuxedo Style - Bespoke Ltd | Wholesale & retail | 2025 |
| Blackrock Plumbing & Heating Ltd | Construction | 2025 |
| Blacktree Partners LLP | | 2008 |
| Blanc Textiles Agency Ltd | Wholesale & retail | 2024 |
| Blinc Light Ltd | Professional & scientific | 2023 |
| Blue Hire Ltd | Administrative & support | 2025 |
| Blue Pool Network Limited | Other services | 2021 |
| Bluebell Estates (Kent) Limited | Real estate | 2006 |
| Bluebell Hill Developments Limited | Construction | 2003 |
| Blueprint Steward Ltd | Professional & scientific | 2026 |
| Bodylinks Osteopathic Practice Limited | Health & social care | 2006 |
| Boiler AID Ltd | Energy | 2021 |
| Bookzat Publishing Ltd | Information & communication | 2017 |
| Boostonline UK Group Ltd | Professional & scientific | 2015 |
| Borrowed From Limited | Wholesale & retail | 2022 |
| Boss GEE Ltd | Wholesale & retail | 2024 |
| Bound 2 Shine Ltd | Administrative & support | 2025 |
| Bourne Capital Holdings Ltd | Professional & scientific | 2017 |
| Bowl Reed Enterprises Ltd | Wholesale & retail | 2005 |
| Bowman Ballard Distribution Company Limited(The) | Real estate | 1986 |
| Box Logistics Limited | Administrative & support | 2017 |
| Branching OUT Tree Surgery Ltd | Agriculture & fishing | 2021 |
| Breathe Consulting Limited | Administrative & support | 2016 |
| Brekkie Bar Ltd | Hospitality | 2025 |
| Brickwood Developments Ltd | Construction | 2023 |
| Bridle Intellectual Property Limited | Professional & scientific | 2007 |
| Bright Path Living Support Limited | Health & social care | 2026 |
| Brimstone Projects Limited | Professional & scientific | 2025 |
| Bring ME Pro Wrestling Ltd | Arts & recreation | 2023 |
| Britannia MOT & Repair Centre Limited | Wholesale & retail | 2004 |
| British Veterans Enterprise Ltd | Public administration | 2025 |
| Brooks Pubs & Bars Ltd | Hospitality | 2024 |
| Brownspring Consultancy Services Limited | Professional & scientific | 2009 |
| Brunswick Law Properties Ltd | Administrative & support | 2004 |
| BTB Resolutions Ltd | Information & communication | 2017 |
| Buckley Civils Limited | Administrative & support | 2014 |
| Build Unique Ltd | Construction | 2018 |
| Buildersolo Ltd | Construction | 2022 |
| Built for Marketing Limited | Professional & scientific | 2008 |
| Bulldog Electrical Ltd | Construction | 2025 |
| Bumps N Scuffs Ltd | Wholesale & retail | 2021 |
| Business Reporting Solutions Limited | Professional & scientific | 2006 |
| Business Tamer Limited | Administrative & support | 2019 |
| Butlers (Caterham) Kent Ltd | Wholesale & retail | 2024 |
| Buzz Trading Ltd | Administrative & support | 2020 |
| BY Fleur Limited | Wholesale & retail | 2022 |
| C and H Commercials Ltd | Wholesale & retail | 2025 |
| C&R Aesthetics Ltd | Other services | 2024 |
| C&Sj Limited | Administrative & support | 2002 |
| C.K.T & C Properties Limited | Administrative & support | 2005 |
| C.L. Fabrications Limited | Manufacturing | 2004 |
| C.N.V. Limited | Hospitality | 1983 |
| Caddy Group Ltd | Extraterritorial | 2018 |
| CAF Ceramics Limited | Wholesale & retail | 2005 |
| Cakal Ltd | Wholesale & retail | 2025 |
| Callow Locksmiths Limited | Wholesale & retail | 2007 |
| Camerascan Cctv Limited | Administrative & support | 1994 |
| Campayne Co Ltd | Real estate | 2019 |
| Canada CAB Maintenance Garage Ltd | Wholesale & retail | 2024 |
| Candles on the Web Limited | Wholesale & retail | 2000 |
| Capco Investments Limited | Professional & scientific | 2005 |
| Capital Cleaning (Kent) Limited | Administrative & support | 1985 |
| Capital Construction (Kent) Limited | Construction | 2026 |
| Capital Web Ltd | Information & communication | 2015 |
| Carbon Neutral Communities Limited | Construction | 2007 |
| Cargoware Ltd | Information & communication | 2019 |
| Carisco Property Solutions Limited | Real estate | 2023 |