| Care Ones, Recruitment and Training Ltd | Education | 2014 |
| Carebridge Lodge Limited | Health & social care | 2026 |
| Carella Clothing Limited | Water & waste | 2019 |
| Caris Plumbing Services Limited | Construction | 2019 |
| Carl Barrand Consulting Limited | Real estate | 2020 |
| Carlton Accountancy and PR Limited | Professional & scientific | 2014 |
| Carma Studio Ltd | Education | 2026 |
| Carpet Clean Prokem Ltd | Administrative & support | 2016 |
| Carrick Inception Limited | Professional & scientific | 2019 |
| Casa Boccone Limited | Hospitality | 2026 |
| Casa Fabuloso Ltd | Real estate | 2020 |
| Casabase Limited | Administrative & support | 1996 |
| Casablanca Solutions Limited | Real estate | 2016 |
| Cascada Media Limited | Professional & scientific | 2005 |
| Casselle Digital Ltd | Professional & scientific | 2026 |
| Castellin Applied Systems Limited | Information & communication | 2026 |
| Casterly Limited | Real estate | 2017 |
| Castle Cleaning Services Limited | Administrative & support | 2019 |
| Castleacre Limited | Construction | 1993 |
| Castlegroom Limited | Households | 1999 |
| Caterpillar Arts Ltd | Information & communication | 2025 |
| Cathcart Media Ltd | Professional & scientific | 2021 |
| Cathrine Gwitirwa Physiotherapy Clinic Limited | Health & social care | 2018 |
| Cattle Brands Ltd | Arts & recreation | 2016 |
| Cavallo Consultancy Limited | Real estate | 2020 |
| Cavalry Investments Limited | Real estate | 1974 |
| Cavendish Court (Bromley Road) RTM Company Limited | Households | 2014 |
| Cavendish Industrial Solutions Ltd | Wholesale & retail | 2016 |
| CB Garden Designs Ltd | Professional & scientific | 2025 |
| CB Medical Aesthetics Ltd | Administrative & support | 2026 |
| CBF Solutions Ltd | Construction | 2022 |
| CC Legacy Ltd | Professional & scientific | 2025 |
| CC Supplies & Workwear Ltd | Construction | 2019 |
| Cctrev Ltd | Professional & scientific | 2026 |
| CD Homes Limited | Real estate | 2018 |
| CD Management Consultants Limited | Professional & scientific | 2012 |
| CDH Business Services Ltd | Professional & scientific | 2014 |
| CDT Property Investments Limited | Real estate | 2017 |
| Cearn Vending Limited | Wholesale & retail | 2015 |
| CEB Group Ltd | Households | 2021 |
| Cecile Healthcare UK Limited | Health & social care | 2021 |
| Cecile Real Estate Limited | Real estate | 2024 |
| Ceddichealthlivingproducts Ltd | Wholesale & retail | 2018 |
| CEE83 Ltd | Wholesale & retail | 2024 |
| CEK Group Ltd | Real estate | 2026 |
| Celeste Infinity Consulting Ltd | Administrative & support | 2025 |
| Celestial Adventures Ltd | Wholesale & retail | 2023 |
| Cell TEC Solutions Ltd | Wholesale & retail | 2024 |
| Celluloid Style Limited | Arts & recreation | 2007 |
| Cellvanta Ltd | Professional & scientific | 2026 |
| Celok Services Limited | Wholesale & retail | 2024 |
| Celsius Climate Systems Limited | Construction | 2025 |
| Celtic Cinema Ltd | Information & communication | 2023 |
| Cematac Pharm-Med Services Ltd | Administrative & support | 2019 |
| Cengo Electrical & Property Services Ltd | Construction | 2026 |
| Cenhealth Limited | Information & communication | 2015 |
| Central Auto Centre Ltd | Wholesale & retail | 2014 |
| Central Flooring Contracts Ltd | Construction | 2020 |
| Central Stonework Limited | Construction | 2020 |
| Central Thames Productions Limited | Information & communication | 2025 |
| Centre for Exploration and Performance of Greek Drama Limited | Arts & recreation | 2025 |
| Centre for Networking and Entrepreneurship Ltd | Wholesale & retail | 2026 |
| Centric Gateway Ltd | Financial services | 2013 |
| Cerint Limited | Wholesale & retail | 2010 |
| Cerint World Ltd | Professional & scientific | 2017 |
| Certsys Services Limited | Construction | 1996 |
| Cesc Capital Limited | Real estate | 2024 |
| Ceto Investment Limited | Financial services | 2022 |
| CFJ Ventures Ltd | Real estate | 2025 |
| CG Energy Services Ltd | Professional & scientific | 2020 |
| CGL Global Ltd | Wholesale & retail | 2026 |
| Chachamoon Group Limited | Hospitality | 2018 |
| Chachamoon Orpington Ltd | Hospitality | 2019 |
| Chacheer Ltd | Real estate | 2017 |
| Chai N Chat Limited | Hospitality | 2025 |
| Chamberlain Accounting Limited | Professional & scientific | 2015 |
| Chandler Electrical Limited | Construction | 2016 |
| Chantler Kent Investments Limited | Professional & scientific | 2004 |
| Chapal Lift Services Limited | Administrative & support | 2013 |
| Charem Property Ltd | Real estate | 2024 |
| Charmend Limited | Health & social care | 1984 |
| Charminster Gardens Limited | Construction | 2024 |
| Chart Estates Limited | Construction | 1985 |
| Charter Oaks Management Company Limited | Households | 1980 |
| Charterhouse Pre-School Ltd | Education | 2008 |
| Chartside Developments Limited | Financial services | 2017 |
| Chartways Consulting Limited | Professional & scientific | 2025 |
| Chase Motors Limited | Construction | 2015 |
| Chatsworth FD Ltd | Professional & scientific | 2007 |
| Chatsworth Restaurant Ltd | Hospitality | 2025 |
| Chauffeur & Executive Rentals Ltd | Transport & logistics | 2020 |
| Cheeta's Kitchen Ltd | Education | 2022 |
| Chelsea Capital Investments Limited | Real estate | 2026 |
| Chelsfield Aesthetics Ltd | Other services | 2023 |
| Chelsfield Allotment Limited | Arts & recreation | 2019 |
| Chelsfield Equestrian Centre (Kent) Limited | Administrative & support | 2010 |
| Chelsfield Park Residents Association Limited | Other services | 1951 |
| Chelsfield Pharm Ltd | Wholesale & retail | 2023 |
| Chelsfield Trading Limited | Wholesale & retail | 2016 |
| Chelsfield Village Fair C.I.C. | Administrative & support | 2018 |