| Brennan & Partners Ltd | Administrative & support | 2016 |
| Brice Estate Agents Limited | Real estate | 2025 |
| Bright House Guttering and Roofing Ltd | Administrative & support | 2012 |
| Bright Houses Property Development Group Ltd | Construction | 2022 |
| Brightholmes Consultancy Limited | Health & social care | 2012 |
| Brightwell Homes Ltd | Construction | 2005 |
| Briosa Ltd | Construction | 2015 |
| Brisket and PIG Ltd | Hospitality | 2019 |
| Britannia Wills Limited | Other services | 1991 |
| Britekey Limited | Construction | 2009 |
| Brix Builders Limited | Construction | 1990 |
| Broadmead Technical Services Ltd | Professional & scientific | 2023 |
| Brooker Brother Investments Ltd | Hospitality | 2022 |
| Brooklands Farm Limited | Professional & scientific | 2025 |
| BS & Sons Holdings Ltd | Professional & scientific | 2025 |
| BSP (Halstead) Limited | Water & waste | 2022 |
| BT 2022 Ltd | Other services | 2022 |
| BTS Building Solutions Limited | Construction | 2015 |
| Buchymix Limited | Wholesale & retail | 2025 |
| Buckingham Promotions Limited | Administrative & support | 1997 |
| Buckingham Rental Properties Ltd | Real estate | 2020 |
| Budai Consulting Ltd | Financial services | 2022 |
| Budaors HQ Investment Ltd | Construction | 2025 |
| Buhmi Ltd | Financial services | 2019 |
| Build Elite Limited | Construction | 2016 |
| Bulger Wicks Decorating Limited | Construction | 1999 |
| Business Coaching Experts Limited | Professional & scientific | 2024 |
| Business Junction Inc Ltd | Administrative & support | 2010 |
| Busisoft Solutions Ltd | Information & communication | 2000 |
| Busy Lizzy Caterham & Coulsdon Ltd | Arts & recreation | 2018 |
| Butterfly Blue Ltd | Professional & scientific | 2011 |
| BY the Fountain Ltd | Hospitality | 2020 |
| C Antoniou Properties Ltd | Real estate | 2023 |
| C J Stuart Limited | Information & communication | 2024 |
| C M B Foods Ltd. | Wholesale & retail | 1996 |
| C.A.Projects Limited | Real estate | 1998 |
| Cage Scaffolding Ltd | Construction | 2015 |
| CAL Architects UK Limited | Financial services | 2023 |
| Callie Day Aesthetics Ltd | Other services | 2026 |
| Calvin Barden Limited | Construction | 2016 |
| Cambridge Music Shop Ltd | Wholesale & retail | 2014 |
| Cameron-Rees Limited | Professional & scientific | 2021 |
| Cannon Farms Inns Ltd | Hospitality | 2011 |
| Cantelupe Road (Management) Limited | Real estate | 2013 |
| Cantrill & Storey Ltd | Professional & scientific | 2025 |
| Capps Farming Partnersnip Ltd | Agriculture & fishing | 2022 |
| Caprichio Ltd | Hospitality | 2022 |
| Captag Solutions Ltd | Information & communication | 2015 |
| Car Sales Eastgrinstead Ltd | Wholesale & retail | 2025 |
| Caravan and Motorhome Club Limited | Extraterritorial | 2000 |
| Caravan Club Limited(The) | Other services | 1959 |
| Caravan Club of Great Britain and IRELAND(1935)LIMITED(THE) | Other services | 1935 |
| Carbyne One Limited | Real estate | 2018 |
| Carl Hulme Heating Limited | Construction | 2015 |
| Carlton Towers (East Grinstead) Limited | Households | 1988 |
| Casa Banana Ltd | Manufacturing | 2026 |
| Casarte Limited | Financial services | 2007 |
| Casemore Aviation Ltd | Manufacturing | 2014 |
| Cashflow Club Global Ltd. | Professional & scientific | 2016 |
| Cassaria Limited | Real estate | 2021 |
| CATALYST4TRANSFORMATION Ltd | Administrative & support | 2025 |
| Catmoon Production International Ltd | Information & communication | 2011 |
| Cavello Construction Limited | Construction | 2026 |
| Cavello Homes Ltd | Construction | 2021 |
| Caviar Phone (UK and NI) Limited | Wholesale & retail | 2026 |
| Cayton Village Caravan Park Limited | Hospitality | 2023 |
| CB Fitness Pilates Ltd | Arts & recreation | 2025 |
| CCE Sussex Ltd | Construction | 2018 |
| CCG Consulting Limited | Professional & scientific | 2022 |
| CE Hepher Ltd | Agriculture & fishing | 2025 |
| CEE TEE Ltd | Professional & scientific | 2022 |
| Celestar Limited | Financial services | 2022 |
| Celltarga Limited | Construction | 1983 |
| Centenary Mining Limited | Mining & quarrying | 2026 |
| Centre for Sight Limited | Health & social care | 1996 |
| Centre for Sight Trust | Health & social care | 2001 |
| Centrepoint Limited | Real estate | 1983 |
| Centurion Building Services Limited | Construction | 2021 |
| Centurion Trustee Limited | Other services | 1999 |
| Cerebros Enterprises Limited | Wholesale & retail | 2021 |
| Cerowski Architects Ltd | Professional & scientific | 2022 |
| Chalfont Flats Residents' Association (Lingfield) Limited | Households | 1989 |
| Chambers Secure Storage Limited | Professional & scientific | 2001 |
| Chambers Will Services Limited | Transport & logistics | 1996 |
| Chameleon Fridays Limited | Other services | 2006 |
| Change to Seeds Ltd | Professional & scientific | 2022 |
| Channel Network Development Limited | Information & communication | 2007 |
| Chantrill Mackenzie Limited | Professional & scientific | 2014 |
| Charge UP and Go Ltd | Information & communication | 2016 |
| Charisma Technology Limited | Professional & scientific | 1997 |
| Charles Avery Associates Ltd | Professional & scientific | 2026 |
| Charles Knowles Design Limited | Professional & scientific | 1996 |
| Charlheights Limited | Construction | 1973 |
| Charlotte Rhodes Films Ltd | Information & communication | 2014 |
| Chart Interiors Limited | Administrative & support | 2010 |
| Chartwell Court (EG) Management Limited | Real estate | 2009 |
| Chase Consulting Development Ltd | Administrative & support | 2015 |
| Cheeky Monkey Treehouses Ltd | Construction | 2008 |
| Chelsea Dogs Ltd | Wholesale & retail | 2013 |
| Cherish Blessing Limited | Wholesale & retail | 2020 |