| Campanile Consultants Ltd | Professional & scientific | 2023 |
| Camversation Online Limited | Other services | 2025 |
| Candy Rock Entertainment Ltd | Arts & recreation | 2010 |
| Canterbury Couriers Limited | Transport & logistics | 1988 |
| Canterbury Lawn Tennis Club Limited | Arts & recreation | 2022 |
| Canterbury Lawn Tennis Trading Ltd | Arts & recreation | 2026 |
| Canterbury Respiratory Ltd | Health & social care | 2019 |
| Canterbury Sound Projects Ltd | Professional & scientific | 2021 |
| Canterbury Urology Limited | Health & social care | 2016 |
| Cantium Land and Development Ltd | Professional & scientific | 2024 |
| Carley Coaching Ltd | Professional & scientific | 2020 |
| Carp Loader Ltd | Wholesale & retail | 2026 |
| Carrington Foods Ltd | Manufacturing | 2014 |
| Carter House Holdings Limited | Hospitality | 2020 |
| Case Welding Limited | Construction | 2026 |
| Caslocke Consult Ltd | Professional & scientific | 2019 |
| Castle Automotive & Engineering Supplies Limited | Wholesale & retail | 1993 |
| Castle Oare Limited | Hospitality | 2018 |
| Castle Woodworks Limited | Manufacturing | 2019 |
| Cataleya Group Ltd | Transport & logistics | 2021 |
| CD Engineering Group Ltd | Professional & scientific | 2025 |
| CDA Acquisition Ltd | Financial services | 2023 |
| Cedar Bookkeeping & Payroll Limited | Professional & scientific | 2017 |
| Cene Media Limited | Information & communication | 2016 |
| Centre for Outcomes of Care | Health & social care | 2017 |
| Century House (Faversham) Limited | Households | 2024 |
| Ceramics at Brenley Limited | Education | 2025 |
| Certling Ltd | Information & communication | 2023 |
| CES Cube Ltd | Manufacturing | 2022 |
| Cesoft Ltd | Information & communication | 2012 |
| Cetin Adem Ltd | Hospitality | 2023 |
| CF Estates Ltd | Hospitality | 2013 |
| CGL Granite Sales Limited | Construction | 2009 |
| CGS (Kent) Limited | Construction | 2016 |
| Changepen Ltd | Information & communication | 2020 |
| Chaplins Consultancy Limited | Professional & scientific | 2020 |
| Charina Management Ltd | Hospitality | 2025 |
| Charles Baxter Ltd | Professional & scientific | 2020 |
| Charleswood Homes Limited | Construction | 2009 |
| Charlotte Vince Marketing Limited | Professional & scientific | 2025 |
| Chartland Properties Limited | Real estate | 1998 |
| Chavereys 2018 Limited | Professional & scientific | 1998 |
| Chavereys Audit Limited | Professional & scientific | 2021 |
| Chavereys Holdings Limited | Financial services | 2023 |
| Chavereys Intelligent Systems Limited | Information & communication | 2021 |
| Chavereys Limited | Professional & scientific | 2018 |
| Chavereys Property Limited | Financial services | 2021 |
| Chelsea Yard Ltd | Wholesale & retail | 2024 |
| Cherry Tree Publishing Limited | Information & communication | 2018 |
| Chichester Crop Consultancy Limited | Professional & scientific | 1985 |
| Childs Plumbing & Electrical Contracting Ltd | Construction | 2022 |
| Chilmington Farms LLP | | 2018 |
| Chimney Farm Barns Management Limited | Households | 2025 |
| Chion Property Ltd | Real estate | 2019 |
| Chislet Court Limited | Agriculture & fishing | 2009 |
| Chris Hudson Electrical Installations Limited | Energy | 2017 |
| Chris Redman Associates PB Limited | Professional & scientific | 2018 |
| Christopher Buck Antiques Limited | Wholesale & retail | 2015 |
| Chrysalis Futures Limited | Real estate | 2001 |
| Churchman's Farm (Enterprises) Limited | Other services | 1998 |
| Cilfynydd Green Energy Limited | Energy | 2021 |
| Cinque Ports Rowing CIC | Manufacturing | 2020 |
| Civils Holding Company Limited | Financial services | 2008 |
| Civils Limited | Construction | 1997 |
| CJ Equestrian Training Ltd | Education | 2018 |
| CKK Solutions Ltd | Administrative & support | 2019 |
| Claire Cardy Associates Ltd | Professional & scientific | 2019 |
| Clarity Windows Doors & Conservatories Limited | Construction | 2021 |
| Clear Wisdom Limited | Extraterritorial | 2017 |
| Clements Moto Limited | Wholesale & retail | 2003 |
| Clevely & Stone LLP | | 2019 |
| Cliftonville Management Limited | Households | 2023 |
| Clinical Audiology Services Limited | Health & social care | 2011 |
| Clive Ackland (Canterbury) Limited | Wholesale & retail | 1962 |
| CLW Meters Ltd | Administrative & support | 2017 |
| CMD Engineering Limited | Manufacturing | 2016 |
| CMR Retail Ltd | Financial services | 2023 |
| Coast & Country Homes Limited | Real estate | 2020 |
| Coast & Country SUB Limited | Extraterritorial | 2020 |
| Coastal Creatives Ltd | Real estate | 2022 |
| Coastal Glow Beauty & Aesthetics Ltd | Other services | 2024 |
| Cobb and Co Consulting Ltd | Information & communication | 2018 |
| Cogent Pharma Limited | Wholesale & retail | 2023 |
| Coinflip Ventures Limited | Information & communication | 2014 |
| Coleby Grange Energy Reserve Ltd | Energy | 2025 |
| Colindale Ltd | Financial services | 2025 |
| Collarstone Limited | Real estate | 1979 |
| Collegia Ltd | Professional & scientific | 2025 |
| Collison Fire Ltd | Professional & scientific | 2018 |
| Colourbox Studio Limited | Manufacturing | 2018 |
| Combat Conditioning Ltd | Arts & recreation | 2019 |
| COMMIT2CARE Recruitment Ltd | Administrative & support | 2019 |
| Community Asset Management CIC | Health & social care | 2018 |
| Community Clothes CIC | Wholesale & retail | 2026 |
| Community Heritage Events Ltd | Arts & recreation | 2018 |
| Compass Recruitment Ltd | Administrative & support | 2011 |
| Complete Land Management Ltd | Professional & scientific | 2014 |
| Compliance Consult Group Ltd | Professional & scientific | 2025 |
| Compton’S Kitchens Ltd | Manufacturing | 2020 |
| Concert Theatre Works Ltd | Arts & recreation | 2020 |