| CG Nail Bar Ltd | Other services | 2026 |
| CGS Blinds and Shutters Ltd | Construction | 2015 |
| CGS Blinds Ltd | Wholesale & retail | 2021 |
| CGS Shutters Ltd | Wholesale & retail | 2021 |
| CH Sales Solutions Ltd | Wholesale & retail | 2025 |
| Chalcroft Management Company Limited (the) | Households | 1971 |
| Chambers Electrical Contractors Ltd | Construction | 2020 |
| Change Design Limited | Administrative & support | 2010 |
| Chapel Property Investments LLP | | 2006 |
| Chappell Contemporary Limited | Wholesale & retail | 2021 |
| Charlie Browns Auto Centres Ltd | Extraterritorial | 2021 |
| Chartfields Management (Ashford) Limited | Households | 2005 |
| Chartfields Residents Association (Phase 3) Limited | Households | 2001 |
| Chatterbox Events Ltd | Hospitality | 2025 |
| Chauffeur Cars Ltd | Transport & logistics | 2009 |
| Cheech Miller Limited | Manufacturing | 2007 |
| Chelwood Gardens Limited | Professional & scientific | 2017 |
| Chesapeake Build Management Ltd | Professional & scientific | 2026 |
| Chestfield Car Wash Limited | Wholesale & retail | 2015 |
| Chestfield Cars Ltd | Transport & logistics | 2022 |
| Chestfield Holdings Limited | Financial services | 2021 |
| Chestfield Manor Golf Club Limited | Arts & recreation | 1964 |
| Chil Fire and Property Management Ltd | Public administration | 2024 |
| Childs Roofing Kent Ltd | Construction | 2024 |
| Chinnus Properties Ltd | Real estate | 2020 |
| Choclete Ltd | Wholesale & retail | 2026 |
| Chocolit Limited | Wholesale & retail | 2022 |
| Chop Chop Busy Busy Work Work Bang Bang Ltd. | Professional & scientific | 2014 |
| Chores and Paws Ltd | Administrative & support | 2024 |
| Churchwood Park (Chestfield) Management Limited | Households | 2000 |
| Ciofaction Ltd | Information & communication | 2023 |
| Circular Kitchens CIC | Professional & scientific | 2026 |
| Cirillo Productions Ltd | Information & communication | 2022 |
| City Commercial Finance Ltd | Financial services | 2019 |
| City Construction (Longcroft) Limited | Construction | 1986 |
| Clarity Curve Ltd | Information & communication | 2024 |
| Classic Renovations and Conversions Limited | Construction | 2009 |
| Claudio Campo Parfums Ltd | Manufacturing | 2024 |
| Claus Mcnulty Ltd | Households | 2025 |
| Claydon Aviation Services Limited | Transport & logistics | 2023 |
| Cleansite Services Limited | Administrative & support | 2025 |
| Clear and Tidy Services Ltd | Transport & logistics | 2025 |
| Clear Safety Services Ltd | Public administration | 2016 |
| Clewer Lodge RTM Company Limited | Households | 2023 |
| Click for Collectables Limited | Wholesale & retail | 2021 |
| Clima Gate Railing & Fencing Limited | Administrative & support | 2007 |
| Climate Combat Renewable Heating and Power Ltd | Construction | 2024 |
| Clio Hope Films Ltd | Arts & recreation | 2015 |
| Clip N Climb High Wycombe (Eden) Ltd | Arts & recreation | 2024 |
| Clip N Climb Thanet Ltd | Arts & recreation | 2020 |
| CLM Management Ltd | Real estate | 2017 |
| Clover and Tide Limited | Wholesale & retail | 2025 |
| Clover Living Ltd | Real estate | 2018 |
| CMB Kitchens & Bathrooms Ltd | Construction | 2016 |
| Coach House Joinery Partnership Limited | Manufacturing | 2017 |
| Coast & City Drivers Limited | Transport & logistics | 2026 |
| Coastal Alliance Co-Operative Trust | Education | 2016 |
| Coastal Glazing Services Ltd | Construction | 2017 |
| Coastal Rooms and Refurbs Ltd | Construction | 2025 |
| Coastal Sheet Metal &Fabrication Ltd | Professional & scientific | 2018 |
| Cobdean Limited | Administrative & support | 2015 |
| Cobilham Property Ltd | Real estate | 2023 |
| Codling Ltd | Financial services | 2026 |
| Collections by Hayley Limited | Administrative & support | 2014 |
| Colombia Street Food Cartel Ltd | Wholesale & retail | 2024 |
| Colonels Cafe Ltd | Hospitality | 2022 |
| Colourwave Printers Limited | Arts & recreation | 2006 |
| Columbine Heights Management Company Limited | Households | 2004 |
| Commercial AL13 Ltd | Manufacturing | 2016 |
| Commercial Recoveries (UK) Ltd | Administrative & support | 2012 |
| Commercial Space Limited | Real estate | 2015 |
| Communication Science Group Ltd. | Professional & scientific | 2016 |
| Community Resilience and Empowerment (CRE) CIC | Education | 2025 |
| Company a Works Ltd | Arts & recreation | 2025 |
| Compass & Cocktails Travel Ltd | Administrative & support | 2024 |
| Complete Fibre Connection Ltd | Information & communication | 2021 |
| Complete Motor Care Ltd | Wholesale & retail | 2010 |
| Complete Roofing Contractors Ltd. | Construction | 2000 |
| Complete Trades Recruitment Construction Ltd | Administrative & support | 2019 |
| Complete Trades Recruitment Engineering Ltd | Administrative & support | 2021 |
| Conceptiv Ltd | Professional & scientific | 2020 |
| Conditioned Air Limited | Construction | 1992 |
| Condor Clubhouse Limited | Arts & recreation | 2026 |
| Connect Publisher Services Ltd | Information & communication | 2025 |
| Connected Social Work Limited | Health & social care | 2023 |
| Constructive Talent Limited | Professional & scientific | 2025 |
| Conterra Group Ltd | Information & communication | 2026 |
| Coolflex Limited | Wholesale & retail | 2009 |
| Coopers (Lamberhurst) Management Company Limited | Households | 2004 |
| Copperfields (Whitstable) Limited | Administrative & support | 2014 |
| Counselling by the Sea Ltd | Professional & scientific | 2018 |
| Country Hire and Go Electric Bikes Ltd | Wholesale & retail | 2022 |
| Country Hire and Go Ltd | Transport & logistics | 2019 |
| Country Hire and Go Private Hire Ltd | Transport & logistics | 2023 |
| Coveney and Allday Properties Ltd | Administrative & support | 2025 |
| CPC (Kent) Limited | Construction | 2018 |
| CPM Services (UK) Limited | Professional & scientific | 2011 |
| Cranleigh Court (Management Company) Limited | Real estate | 1990 |
| CRC (Thanet) Ltd | Construction | 2023 |
| Creative OPS Consulting Ltd | Professional & scientific | 2024 |