| Chrysalis Care Consultancy Limited | Extraterritorial | 2023 |
| Chrysalis Care Counselling Limited | Extraterritorial | 2023 |
| Chrysalis Care Courses Limited | Extraterritorial | 2023 |
| Chrysalis Cottages Ltd | Real estate | 2021 |
| Chrysalis Effect Health Limited | Education | 2017 |
| Chunky BUM Ltd. | Wholesale & retail | 2012 |
| Chêne Ltd | Arts & recreation | 2019 |
| Circe Technologies Ltd | Health & social care | 2026 |
| Ciseed Limited | Professional & scientific | 2017 |
| Citrus Financial Management Limited | Financial services | 2002 |
| Citrus Wills and Trusts Limited | Professional & scientific | 2013 |
| City Arts Trust Limited(The) | Arts & recreation | 1962 |
| City Digital Limited | Administrative & support | 1998 |
| City Hideaways Ltd | Hospitality | 2023 |
| City Search Group Ltd | Administrative & support | 2018 |
| Citymead Ltd | Administrative & support | 2023 |
| Cityscope Solutions Limited | Construction | 2017 |
| CJC Travel Consultancy Limited | Professional & scientific | 2014 |
| CJG Construction Management Ltd | Professional & scientific | 2024 |
| Cjrc Limited | Health & social care | 2007 |
| Cjsb Consulting Limited | Administrative & support | 2019 |
| CKE Genetic Services Ltd | Information & communication | 2026 |
| CKS Recycling Limited | Water & waste | 2015 |
| CL Event Management Ltd | Arts & recreation | 2022 |
| Clacketts Wood Limited | Construction | 2020 |
| Claddagh Productions Ltd | Arts & recreation | 2020 |
| Clade Investments Limited | Real estate | 2021 |
| Claims Deflect Limited | Professional & scientific | 2010 |
| Clan House (Sevenoaks) Residents Limited | Households | 1977 |
| Clare Edmead Photography Limited | Administrative & support | 2011 |
| Claredon Investment Ltd | Financial services | 2019 |
| Clarendon Court (Sevenoaks) Management Company Limited | Households | 1980 |
| Clarendon House Residents Maintenance Society Limited | Real estate | 1977 |
| Clarendon Place (1993) Limited | Real estate | 1994 |
| Claret House Residents Limited | Households | 1971 |
| Clario Health Ltd | Health & social care | 2026 |
| Clariti Counselling Limited | Health & social care | 2026 |
| Clarity (Kent) Ltd | Health & social care | 2016 |
| Clarity Capital Ltd | Professional & scientific | 2010 |
| Clark Consultancy & Accounting Services Limited | Professional & scientific | 2020 |
| Clarke Design & Build Limited | Construction | 2008 |
| Classic Car Parts Direct Limited | Professional & scientific | 2010 |
| Claudia Sebire Limited | Wholesale & retail | 2017 |
| Claylands Court Limited | Other services | 2019 |
| Clean by Drone Ltd | Administrative & support | 2025 |
| Cleansave Limited | Wholesale & retail | 2010 |
| Clear Edge Communications Limited | Professional & scientific | 2011 |
| Clear IT Solutions (UK) Limited | Administrative & support | 2013 |
| Clear Space Clearance Ltd | Water & waste | 2025 |
| Clear the Brand Limited | Manufacturing | 2024 |
| Clearview Consulting Services Ltd | Professional & scientific | 2015 |
| Clearwater Bay Land Limited | Administrative & support | 2016 |
| Clearways Services Limited | Wholesale & retail | 2017 |
| Clearzone Pest Control Ltd | Administrative & support | 2024 |
| Cledco Limited | Real estate | 2017 |
| Clic Accounting Ltd | Professional & scientific | 2016 |
| Click Clear Group Limited | Water & waste | 2024 |
| Clickabyte Ltd | Information & communication | 2025 |
| Climate Finance Group Limited | Professional & scientific | 2024 |
| CLM Fire Consultancy Limited | Professional & scientific | 2021 |
| CLM Fireproofing Limited | Construction | 2002 |
| CLM Group Limited | Real estate | 2019 |
| Clomp Ltd | Manufacturing | 2024 |
| Cloud Discovery Limited | Professional & scientific | 2019 |
| CM Suffolk Holdings Limited | Financial services | 2019 |
| Cmacs Limited | Information & communication | 1991 |
| CMB E-Commerce Ltd | Wholesale & retail | 2025 |
| CMG Tiling Ltd | Construction | 2012 |
| CNM Partners LLP | | 2009 |
| Co Sound Ltd | Information & communication | 2018 |
| CO-CR8 Ltd | Professional & scientific | 2025 |
| Coach Associates Ltd | Professional & scientific | 2015 |
| Coaching Watershed Ltd | Professional & scientific | 2020 |
| Coachos Ltd | Information & communication | 2026 |
| Coastal Cooks Ltd | Hospitality | 2020 |
| Coax Software UK Ltd | Information & communication | 2018 |
| Cobden (Architectural Design) Ltd | Professional & scientific | 2001 |
| Cobden Holdings Limited | Professional & scientific | 2001 |
| Coco Hair & Beauty (Kent) Limited | Other services | 2019 |
| Cocovini Construction Ltd | Manufacturing | 2013 |
| COD Hole LLP | | 2014 |
| Code Fission Ltd | Information & communication | 2020 |
| Cods Corner Management Limited | Agriculture & fishing | 1981 |
| Coelus Flight Services Limited | Information & communication | 2011 |
| Cogitare Advisors Limited | Professional & scientific | 2023 |
| Cohesion Design Studio Ltd | Professional & scientific | 2025 |
| Colbear Consulting Limited | Professional & scientific | 2025 |
| Colco Holdings Limited | Financial services | 1963 |
| Colin Toms and Partners LLP | | 2008 |
| Collabity Media Ltd | Information & communication | 2024 |
| Collective Psychology (Surrey) Limited | Real estate | 2023 |
| Collective Psychology Limited | Health & social care | 2018 |
| Collective Schools Ltd | Health & social care | 2026 |
| Collet Creations Ltd | Manufacturing | 2025 |
| Collette&Son Limited | Hospitality | 2024 |
| Colnet Construction Ltd | Construction | 2001 |
| Colourcell Limited | Administrative & support | 1998 |
| Comex Catering Service Ltd | Manufacturing | 2020 |
| Comfort Click Limited | Wholesale & retail | 2005 |
| Comley Strategic Advisory Ltd | Professional & scientific | 2025 |