| Capital Connection Limited | Financial services | 2000 |
| Capital Maintenance Services Limited | Administrative & support | 2025 |
| Capital Projects Consulting Limited | Construction | 2015 |
| Capon Capital Limited | Financial services | 2021 |
| Capricorn Creative Ltd | Professional & scientific | 2022 |
| Caprixav Consulting Ltd | Information & communication | 2021 |
| Captivate Your Socials Ltd | Professional & scientific | 2025 |
| Car Storage in Kent Limited | Other services | 2015 |
| Carb Cutters Ltd | Education | 2019 |
| Carbon Africa Ltd | Professional & scientific | 2022 |
| Carbon Footprint Analysis UK Limited | Professional & scientific | 2023 |
| Carbonomy Limited | Administrative & support | 2021 |
| Cardiology Consulting (UK) Ltd. | Health & social care | 2011 |
| Cards Collective Ltd | Wholesale & retail | 2017 |
| Carducci Investments Limited | Real estate | 2005 |
| Care for YOU at Home Ltd | Health & social care | 2024 |
| Care Foundation Trust | Education | 2017 |
| Care in Kent Limited | Health & social care | 1997 |
| Care Insights Limited | Health & social care | 2019 |
| Care N Build Ltd | Construction | 2023 |
| Care Serene Ltd | Health & social care | 2022 |
| CARE4PATIENCE Limited | Health & social care | 2020 |
| Caredrive Solutions Limited | Health & social care | 2023 |
| Carefootly Ltd | Health & social care | 2024 |
| Carehoist Solutions Ltd | Manufacturing | 2025 |
| Careringtravel Ltd | Extraterritorial | 2024 |
| Caretalent Ltd | Administrative & support | 2015 |
| Carewise Ltd | Health & social care | 2007 |
| Carey Rail Ltd | Professional & scientific | 2021 |
| Cargo & Courier Support Services Limited | Transport & logistics | 1999 |
| Cargostars Ltd | Transport & logistics | 2025 |
| Caring VET Ltd | Professional & scientific | 2023 |
| Carlson Gracie Ashford Acadamy Ltd | Arts & recreation | 2016 |
| Carlton Leas Residents Association Limited | Households | 1989 |
| Carnalea Limited | Administrative & support | 2010 |
| Carp Angling Adventures Limited | Agriculture & fishing | 2025 |
| Carpenter Wealth Management Limited | Financial services | 2015 |
| Carpet Shine Ltd | Administrative & support | 2024 |
| Carr & Stellar Ltd | Real estate | 2025 |
| Carrie Kershaw Landy Ltd | Education | 2024 |
| Carrier Investments UK Limited | Professional & scientific | 2009 |
| Carrier UK Holdings Limited | Financial services | 2008 |
| Carroll Electrical Limited | Manufacturing | 2015 |
| Cars of Kent Ltd | Wholesale & retail | 2026 |
| Carsbrook Ltd | Other services | 2013 |
| Carving Futures C.I.C. | Manufacturing | 2023 |
| Cas-Uk Ltd | Manufacturing | 2026 |
| Casa Olivia Ltd | Wholesale & retail | 2019 |
| Cascade Insurance Services Limited | Financial services | 2014 |
| Cascadia Ltd | Transport & logistics | 2025 |
| Caspell Carpentry Limited | Construction | 2004 |
| Casper Chan Ltd | Arts & recreation | 2023 |
| Cassian Consulting Limited | Administrative & support | 2012 |
| Cassidys Limited | Professional & scientific | 2007 |
| Cassidys Secretarial Services Limited | Administrative & support | 2008 |
| Cassymore African Caribbean Shop Ltd | Wholesale & retail | 2023 |
| Cassymore Ltd | Health & social care | 2019 |
| Castle Engineering Management Limited | Professional & scientific | 2022 |
| Castle Inc Ltd | Administrative & support | 2025 |
| Castleford Homes Ltd | Real estate | 2023 |
| Cat Services Ltd | Other services | 2016 |
| Catc Consulting Ltd | Information & communication | 2023 |
| Catch Catering Ltd | Hospitality | 2025 |
| Catchpole & RYE Limited | Wholesale & retail | 1998 |
| Category Edge Solutions Ltd | Professional & scientific | 2018 |
| Catersafe Consultants Limited | Hospitality | 2011 |
| Cathedral Cleaning Ltd | Administrative & support | 2019 |
| Catt Accountancy Limited | Professional & scientific | 2013 |
| Caumont Ltd | Professional & scientific | 2020 |
| Cave Electrical Services Ltd | Construction | 2014 |
| Cavendish and Solomon Properties Ltd | Real estate | 2016 |
| Cavo's Coffee Shop Limited | Hospitality | 2017 |
| Caxton Property Company Limited | Real estate | 1996 |
| Cayena Resources Limited | Professional & scientific | 2015 |
| CB Electrical South East Ltd | Construction | 2024 |
| CB Projectx Ltd | Information & communication | 2023 |
| CBF Special Projects Ltd | Administrative & support | 2021 |
| CBG Universal Services Ltd | Wholesale & retail | 2024 |
| Cbls Consultants Ltd | Construction | 2017 |
| CC Eco Ltd | Information & communication | 2019 |
| CC Print Services Ltd | Manufacturing | 2018 |
| CC Transport Ltd | Transport & logistics | 2019 |
| CC2 Consulting Limited | Professional & scientific | 2014 |
| Ccares Limited | Health & social care | 2019 |
| CCL Label (Ashford) Limited | Manufacturing | 1964 |
| CCM Scenic Decorating Ltd | Manufacturing | 2025 |
| CCS Kent Ltd | Other services | 2011 |
| CCS Roofing and Gutters Ltd | Construction | 2024 |
| CD Creates Ltd | Information & communication | 2021 |
| CDE International Limited | Education | 2007 |
| CDN Consular Services Limited | Public administration | 2010 |
| CDN Holdings Limited | Extraterritorial | 2023 |
| CDN Property Design & Interiors Ltd | Households | 2022 |
| Cdpartridge Consulting Limited | Information & communication | 2010 |
| CDR International UK Ltd | Professional & scientific | 2016 |
| Cdsltd Ltd | Construction | 2023 |
| Ce&Mw Management Limited | Hospitality | 2022 |
| Cedar 77 Ltd | Real estate | 2007 |
| Cedar Blooms Limited | Real estate | 2022 |
| Cedar Consultancy Services & Associates Limited | Administrative & support | 2019 |