| Cali Automotive Ltd | Wholesale & retail | 2025 |
| Calma Booths Ltd | Wholesale & retail | 2018 |
| Camilla FOY Ltd | Administrative & support | 2023 |
| Camp Forge Limited | Other services | 2023 |
| Cann Hall Limited | Real estate | 2015 |
| Capital City Training Limited | Education | 2010 |
| Capital Springs and Pressings Limited | Manufacturing | 1986 |
| Caritas Group Ltd | Health & social care | 2025 |
| Carpgrove Limited | Construction | 2001 |
| Cathedral Builders Limited | Construction | 1990 |
| Cattle Cream Cosmetics Ltd | Wholesale & retail | 2026 |
| CBR Electrical Supplies Limited | Wholesale & retail | 2007 |
| Celeris Trading Limited | Wholesale & retail | 2026 |
| Central Stonework Services Ltd | Manufacturing | 2024 |
| Certus Advisory Ltd | Information & communication | 2015 |
| Chadwick Court Management Limited | Households | 1981 |
| Champion Groundwork Services Ltd | Construction | 2026 |
| Charlie Food Ltd | Hospitality | 2023 |
| Charlotte Maslen Ltd | Professional & scientific | 2009 |
| Chartsfield Construction Ltd | Construction | 2025 |
| Chartsfield Group Ltd | Construction | 2025 |
| Chartsfield Interiors Ltd | Construction | 2025 |
| Chartside Design Ltd | Professional & scientific | 2023 |
| Chartwell (Redhill) Homes Ltd | Construction | 2024 |
| Chartwell Building Surveys Ltd | Professional & scientific | 2022 |
| Chartwell Commercial Properties Limited | Extraterritorial | 2008 |
| Chartwell Construction Group Ltd | Construction | 2023 |
| Chartwell Land & Development Ltd | Real estate | 2020 |
| Chartwell Land & New Homes (2) Limited | Construction | 2015 |
| Chartwell Land & New Homes Ltd | Construction | 2010 |
| Chartwell New Homes Limited | Extraterritorial | 2008 |
| Chartwell Property Group Limited | Construction | 2008 |
| Chasfar Estates Limited | Real estate | 1952 |
| Chichester Sailing Ltd | Other services | 2016 |
| Chiddingstone Church of England School | Education | 2011 |
| Chiddingstone Dairy Ltd | Manufacturing | 2022 |
| Chiddingstone Stores Ltd | Wholesale & retail | 2024 |
| Childs (Red House) Management Company Limited | Households | 1972 |
| Churchill Heritage Limited(The) | Administrative & support | 1984 |
| CJA Concrete Ltd | Manufacturing | 2025 |
| Clare Noden Consulting Limited | Professional & scientific | 2022 |
| Clariott Developments Limited | Construction | 2019 |
| Claritycraft Limited | Manufacturing | 2020 |
| Claritystamp Limited | Manufacturing | 2005 |
| CLC Industries Ltd | Construction | 2025 |
| Clean ALL Crew Services Ltd | Administrative & support | 2018 |
| Cleantech Engineering Limited | Professional & scientific | 2017 |
| Cleared Technologies Ltd | Information & communication | 2026 |
| Cleeve Road Ltd | Construction | 2018 |
| Climate Component (Services) Limited | Professional & scientific | 1995 |
| Climate Components Ltd | Manufacturing | 2004 |
| Cloudberry House Ltd | Wholesale & retail | 2026 |
| CLS Displays Ltd | Manufacturing | 2008 |
| CLS Graphics Ltd | Professional & scientific | 1974 |
| CNK Services Ltd | Construction | 2015 |
| Coach Craig TT Ltd | Education | 2024 |
| Cojac Consultancy Limited | Professional & scientific | 2009 |
| Colestock Caravan Storage Ltd | Transport & logistics | 2018 |
| Collection Francaise Limited | Wholesale & retail | 2015 |
| Columba Solutions Limited | Professional & scientific | 2009 |
| Combe Bank Homes (Oakhurst) Limited | Construction | 2011 |
| Combe Homes (Borough Green) Ltd | Construction | 2014 |
| Commonwork Organic Farms Limited | Agriculture & fishing | 1986 |
| Commonwork Trust | Education | 2014 |
| Community Car Wash Ltd | Administrative & support | 2019 |
| Conduit Payroll Ltd. | Administrative & support | 2011 |
| Connect Plumbing Ltd | Construction | 2023 |
| Construction Solutions (South East) Limited | Construction | 2005 |
| Constructpro Ltd | Construction | 2023 |
| Consultify Saas Ltd | Information & communication | 2026 |
| Convert Wiring Systems Ltd | Manufacturing | 2019 |
| Coombe KP Limited | Wholesale & retail | 2007 |
| Cooper Farms Partnership LLP | | 2019 |
| Coppernose Brewery Limited | Manufacturing | 2026 |
| Core Balance Limited | Arts & recreation | 2024 |
| Cosmedic Laser Ltd | Wholesale & retail | 2023 |
| Cosmedic Supplies Limited | Wholesale & retail | 2018 |
| Cowden Mews Management Company Limited | Households | 1987 |
| Cranbrook Mews Limited | Households | 2006 |
| Cranstead Mill Limited | Professional & scientific | 2012 |
| Creative Workshop (UK) Ltd | Arts & recreation | 2004 |
| Crewpace Limited | Real estate | 1984 |
| Cricketers Walk Company Limited | Households | 2018 |
| Crockham Hill Consulting Ltd | Professional & scientific | 2014 |
| Crockhams Limited | Real estate | 1979 |
| Cronus Associates Limited | Administrative & support | 2014 |
| Crosslands Consultancy Limited | Professional & scientific | 2017 |
| Crouch House Limited | Households | 2000 |
| Crozz Rigging Limited | Construction | 2021 |
| CSO Group Limited | Manufacturing | 2018 |
| CTU Tactical Limited | Professional & scientific | 2019 |
| Culworth House Management Company Limited | Households | 1971 |
| Currie & Robertson Limited | Professional & scientific | 2024 |
| Currie Accountancy Limited | Professional & scientific | 2003 |
| D&D Golding-Wood (Partners) Limited | Health & social care | 2013 |
| Dalton Corp Ltd | Financial services | 2023 |
| Dalton Estate Properties Ltd | Real estate | 2020 |
| Danadam Financial Services Limited | Households | 1987 |
| Darren Lovell Lighting Limited | Information & communication | 2010 |
| Davids Repair & Maintenance Ltd | Construction | 2026 |