| Brightlights Intellectual Property Limited | Professional & scientific | 2003 |
| Brightsoft Data Systems Ltd | Information & communication | 1980 |
| Brine Aspire Limited | Professional & scientific | 2010 |
| Brine Osorio Aspire Limited | Administrative & support | 2010 |
| Brinkworths Accounting Services Ltd | Professional & scientific | 2018 |
| Broadcrest Developments Limited | Real estate | 1985 |
| Broadplace Advertising Limited | Professional & scientific | 2005 |
| Brooklands 26 Limited | Construction | 2025 |
| Brooklyn Court and Close Woking Management Company Limited | Households | 2009 |
| Brooks and Rivers Limited | Professional & scientific | 1931 |
| Browns of Surrey Ltd | Wholesale & retail | 2018 |
| Brujass Ltd | Wholesale & retail | 2023 |
| Brunswick Consulting Limited | Professional & scientific | 2005 |
| Brush and Bubbles Ltd | Arts & recreation | 2018 |
| BSF Electrical Ltd | Construction | 2026 |
| BSW Consultancy Ltd | Professional & scientific | 2025 |
| Btech&Co Ltd | Information & communication | 2025 |
| Bubbles and Barks Fetcham Ltd | Wholesale & retail | 2026 |
| Buchanan & Curwen (Leatherhead) Limited | Construction | 1980 |
| Buchanan & Curwen Group Limited | Construction | 2008 |
| Budd Services Ltd | Transport & logistics | 2019 |
| Building Design Associates Limited | Professional & scientific | 2013 |
| Bumblebee Professional Services Ltd | Professional & scientific | 2015 |
| Bungalow OFF Licence & Newsagent Ltd | Wholesale & retail | 2022 |
| Burl & BOW Limited | Extraterritorial | 2019 |
| Burnhams Road (Bookham) Limited | Other services | 2024 |
| Bury Street Residents Company Limited | Households | 1970 |
| Bushwillow Homes (Crawley Down) Limited | Construction | 2024 |
| Bushwillow Homes (Ewhurst) Limited | Construction | 2023 |
| Bushwillow Homes (Franklands) Limited | Construction | 2023 |
| Bushwillow Homes (Real Estate) Limited | Real estate | 2023 |
| Bushwillow Homes Limited | Financial services | 2023 |
| Business Co-Ordination Limited | Information & communication | 1992 |
| Business Liaison Consulting Limited | Financial services | 2016 |
| Business Medical Ltd | Professional & scientific | 2023 |
| Businesspaye Limited | Professional & scientific | 2026 |
| Bussch Lion Limited | Information & communication | 2025 |
| Butlers Crescent (Dudley) Estate Management Company Limited | Households | 2016 |
| Bychurch END Residents Association Limited | Households | 1996 |
| Bylarys Ltd | Professional & scientific | 2025 |
| Byron Drake Holdings Limited | Construction | 2020 |
| Byron Drake Limited | Construction | 2000 |
| Bytes Security Partnerships Limited | Extraterritorial | 2001 |
| Bytes Software Services Limited | Information & communication | 1982 |
| Bytes Technology Group Holdings Limited | Extraterritorial | 2000 |
| Bytes Technology Group PLC | Financial services | 2020 |
| Bytes Technology Holdco Limited | Professional & scientific | 2020 |
| Bytes Technology Limited | Information & communication | 1998 |
| Bytes Technology Training Limited | Extraterritorial | 1992 |
| C Hillier Tree Contractors Ltd | Agriculture & fishing | 2025 |
| C Urwin Carpentry Limited | Manufacturing | 2021 |
| C3 Psychology Services Ltd | Health & social care | 2020 |
| Cadence Consultancy Ltd | Professional & scientific | 2025 |
| Caelum Property Maintenance Limited | Administrative & support | 2014 |
| Cageyenne Ltd | Wholesale & retail | 2021 |
| Cairn House (Freehold) Limited | Households | 2006 |
| Calbrook Coachworks Ltd | Manufacturing | 2023 |
| Calluna Management Company Limited | Households | 1980 |
| Calmont (Wishart Street) Limited | Construction | 2022 |
| Calmont Developments Limited | Real estate | 2014 |
| Calmont JR (Bulldale) Ltd | Construction | 2022 |
| Calmont Limited | Construction | 1999 |
| Calmont Management Limited | Professional & scientific | 1990 |
| Calmont Metro Limited | Construction | 2007 |
| Calmont Project Services Ltd | Construction | 2006 |
| Calmont Sugarhouse Ltd | Construction | 2007 |
| Camelia Close (Tadworth) Residents Management Company Limited | Households | 2021 |
| Cannon Mews Management Limited | Households | 2013 |
| Canterbury House RTM Company Limited | Real estate | 2011 |
| Canterbury Mews Management Company Limited | Households | 1995 |
| Cape Canary Limited | Wholesale & retail | 2021 |
| Cape Verde Capital Limited Partnership | | 2008 |
| Capel Alley Limited | Financial services | 2023 |
| Capel House Farm Management Company Limited | Households | 2008 |
| Caphi Consultancy Ltd | Professional & scientific | 2026 |
| Capital House Projects Limited | Construction | 2012 |
| Capitello Estates Limited | Real estate | 2007 |
| Capstead One Limited | Real estate | 2024 |
| Capstead Roban Limited | Real estate | 2026 |
| Cardgrove Limited | Households | 1984 |
| Cardiac Risk in the Young | Health & social care | 1995 |
| Care Management Group (Cymru) Limited | Health & social care | 1999 |
| Care Management Group Limited | Health & social care | 1994 |
| Care View Services Limited | Health & social care | 2005 |
| Caresara Ltd | Public administration | 2024 |
| Carlians Limited | Wholesale & retail | 1999 |
| Carlington Associates Ltd | Professional & scientific | 2005 |
| Carlington Ltd | Real estate | 2000 |
| Carlton Mews (West Hampstead) Limited | Households | 2000 |
| Carnbrae Property Management Limited | Real estate | 2000 |
| Carolyn Fiddes Limited | Information & communication | 2019 |
| Caron Warner Celebrancy Limited | Arts & recreation | 2026 |
| Carry on Designing Ltd | Professional & scientific | 2023 |
| Carters (Furnishings) Limited | Professional & scientific | 2005 |
| Carters Contract Flooring UK Limited | Construction | 1945 |
| Cartgate A303 LLP | | 2025 |
| Cartmel Limited | Real estate | 2026 |
| Carvista Pro Ltd | Wholesale & retail | 2025 |
| Casau Ltd | Information & communication | 2025 |
| Casbens Supported Living Community and Home Support Services Ltd | Health & social care | 2014 |