| Chayora Capital Limited | Administrative & support | 2012 |
| Cheapscrews Ltd | Wholesale & retail | 2020 |
| Checkfair Limited | Real estate | 1973 |
| Cheetah Transport Limited | Administrative & support | 2006 |
| Chemjong Group Holdings Ltd | Hospitality | 2025 |
| Cherished Haven Ltd | Hospitality | 2025 |
| Cherry Three Property Ltd | Real estate | 2024 |
| Chhill Investments Ltd | Real estate | 2025 |
| Chichak Anaesthetic Services Ltd | Health & social care | 2026 |
| Chicken Dinner Games Ltd | Information & communication | 2020 |
| Chig Oasis Company Ltd | Health & social care | 2022 |
| Children's Eyes in London Limited | Health & social care | 2012 |
| Chilham 2017 Limited | Hospitality | 2017 |
| Chilham Castle Estate Group Limited | Financial services | 2022 |
| Chilham Castle Estate Limited | Arts & recreation | 2022 |
| Chimaera Ltd | Professional & scientific | 2024 |
| Chineham Tyres Limited | Administrative & support | 2009 |
| Chinese Learning Paradise Ltd | Education | 2019 |
| Chislet Brewery Ltd | Manufacturing | 2023 |
| Chom Chom Canterbury Limited | Hospitality | 2016 |
| Choose Leisure Holdings Limited | Financial services | 2020 |
| Choose Leisure Limited | Wholesale & retail | 2008 |
| Choosy Food Ltd | Hospitality | 2025 |
| Chop Africana Ltd | Hospitality | 2024 |
| Chopchop Chinese Food. Ltd | Hospitality | 2023 |
| Choumert Development Ltd | Real estate | 2025 |
| CHP Taxi and Chauffeur Services Limited | Transport & logistics | 2016 |
| Chris & Rose Ltd | Health & social care | 2016 |
| Chris Filmer Electrical Limited | Construction | 2012 |
| Chris Lovelace Surveys Ltd | Professional & scientific | 2024 |
| Chris Stephens Contracting Limited | Agriculture & fishing | 2015 |
| Chris White Property Ltd | Real estate | 2025 |
| Christ Apostolic Church, Bexley | Other services | 2010 |
| Christ Church Students' Union | Other services | 2011 |
| Christchurch Investment Management Limited | Financial services | 1988 |
| Christopher Hodgson Limited | Real estate | 2009 |
| Christopher Runciman Ltd | Professional & scientific | 2021 |
| Chronos AI Holdings Limited | Information & communication | 2025 |
| CHS Project Managers Limited | Professional & scientific | 2006 |
| Chuck and Blade Canterbury Limited | Hospitality | 2021 |
| Churchill House School Services Limited | Real estate | 1978 |
| Cideb Editrice S.R.L. | | 2000 |
| Cieo Ltd | Information & communication | 2019 |
| Ciko Estates Kent Ltd | Financial services | 2025 |
| Ciko Holding Kent Ltd | Financial services | 2025 |
| Cinars Property Ltd | Real estate | 2025 |
| Cinko Health Limited | Health & social care | 2018 |
| Cinque Ports Aggregates Ltd | Administrative & support | 2023 |
| CIO Investment Club Limited | Information & communication | 2024 |
| Circa 2007 Properties LLP | | 2007 |
| Circa Limited | Real estate | 1983 |
| Circuit Payments Limited | Administrative & support | 2024 |
| Cismaru Barber Ltd | Other services | 2026 |
| Citadel Grounds Clearance Ltd | Construction | 2024 |
| Citadel Properties Limited | Hospitality | 2018 |
| Citadel Restoration Limited | Professional & scientific | 2002 |
| Citi Group (Holdings) Ltd | Financial services | 2023 |
| Citi Group (Kent) Limited | Hospitality | 2020 |
| Citi Homes U.K Ltd | Real estate | 2024 |
| Citrus Construction Management Ltd | Professional & scientific | 2023 |
| Citrus Facilities Management Ltd | Construction | 2023 |
| City & Urban (Canterbury) Limited | Construction | 2011 |
| City and Coastal Property Management Ltd | Real estate | 2026 |
| City Arms Inn Limited | Hospitality | 2018 |
| City Core Creatives Limited | Wholesale & retail | 2022 |
| City Finance Partners Ltd | Real estate | 2017 |
| City Gardens Limited | Real estate | 2013 |
| City Prospect Canterbury Limited | Construction | 2025 |
| City Sound & Lighting Limited | Arts & recreation | 2018 |
| City Star Taxis Limited | Transport & logistics | 2024 |
| City View Pre-School & Nurseries Limited | Education | 2008 |
| City Wall Canterbury Limited | Construction | 2018 |
| Cityline Developments Limited | Construction | 2019 |
| Cityscape (Canterbury) Limited | Real estate | 2014 |
| Cityscape (Old Dover Road) Ltd | Construction | 2015 |
| Civi TAS DEI Healthcare Ltd | Health & social care | 2024 |
| Civil Building & Roofing Ltd | Construction | 2025 |
| Cj's 98 Limited | Wholesale & retail | 2019 |
| CJS Developments (Broadstairs) Limited | Construction | 2017 |
| CK Distributors UK Ltd | Wholesale & retail | 2026 |
| Cladv Limited | Health & social care | 2026 |
| Clague Architects Limited | Professional & scientific | 2019 |
| Clague Kent Limited | Professional & scientific | 2002 |
| Clague LLP | | 2008 |
| Claire DO Monte Weddings & Events Ltd | Other services | 2026 |
| Clarcon Property Leasing Ltd | Real estate | 2025 |
| Clarcon Property Ltd | Real estate | 2025 |
| Clare Court Management Company (Canterbury) Limited | Real estate | 1988 |
| Clarity Apps Ltd | Information & communication | 2024 |
| Clark's Cars Limited | Wholesale & retail | 2019 |
| Clarkes Property Investment Ltd | Real estate | 2022 |
| Clarks Homesmart Limited | Wholesale & retail | 2005 |
| Clarks of Canterbury Limited | Construction | 2015 |
| Classicus Estates Limited | Administrative & support | 2015 |
| Classy JAN Collection Ltd | Wholesale & retail | 2023 |
| Claymaid Interiors Limited | Construction | 2004 |
| Clean and Clear Property Services Limited | Wholesale & retail | 2020 |
| Clean Prop Ltd | Real estate | 2022 |
| Cleaning & Moore Ltd | Administrative & support | 2025 |
| Cleaning Buddy Ltd | Administrative & support | 2024 |