| Celeris Partners International Limited | Administrative & support | 2024 |
| Celestia PP (Pension Partnership) LLP | | 2018 |
| Celestial Solar Ltd | Construction | 2022 |
| Cellarium Consulting Limited | Administrative & support | 2006 |
| Celtic Healthcare Ltd | Health & social care | 2024 |
| CEM Electrical Services Ltd | Construction | 2017 |
| Cemeng Consulting Ltd | Professional & scientific | 2021 |
| Cenlery Ltd | Information & communication | 2024 |
| Censory Limited | Wholesale & retail | 2024 |
| Cent'Anni Ltd | Construction | 2012 |
| Centauri Health Limited | Public administration | 2021 |
| Centauri Homes Ltd | Real estate | 2022 |
| Central Air Ltd | Construction | 2022 |
| Central Facilities Services Limited | Administrative & support | 2018 |
| Central London Holdings Ltd | Real estate | 2019 |
| Central Property Services (Southern) Ltd | Construction | 1989 |
| Central Site Security Ltd | Administrative & support | 2020 |
| Central Surgical Company Limited | Manufacturing | 1966 |
| Centre for Human Development CIC | Wholesale & retail | 2021 |
| Centre of Polish Culture and Education in Ashford (Kent) | Education | 2024 |
| Centre Secure Group Ltd | Administrative & support | 2025 |
| Centrobed Limited | Health & social care | 2007 |
| Centroller Limited | Manufacturing | 1995 |
| Centromed International Limited | Professional & scientific | 1995 |
| Centurian Media Limited | Information & communication | 2018 |
| Centurion Media Limited | Administrative & support | 2021 |
| Centurion Plumbing & Heating Ltd | Construction | 2015 |
| Cerineas LLP | | 2026 |
| Cerra & Gioviale Partner Ltd | Professional & scientific | 2026 |
| Certisense Limited | Education | 2025 |
| CES Security Solutions Ltd | Manufacturing | 2009 |
| Cetivo Limited | Information & communication | 2024 |
| Cetty LLP | | 2023 |
| Ceylon Travelex UK Limited | Administrative & support | 2023 |
| Ceyndulgent UK Ltd | Wholesale & retail | 2021 |
| Ceyted Nutracare Ltd | Wholesale & retail | 2024 |
| CF Management Consultancy Limited | Professional & scientific | 2025 |
| CF2 Holdings Ltd | Financial services | 2024 |
| Cfmp Limited | Professional & scientific | 2016 |
| CFP Fisheries Ltd | Agriculture & fishing | 2024 |
| CFX Capital Ltd | Hospitality | 2022 |
| CGM Building and Restoration Ltd | Construction | 2020 |
| CGM Properties Limited | Real estate | 2020 |
| CGR Dairy Services Limited | Wholesale & retail | 2014 |
| CGR Maintenance Ltd | Construction | 2026 |
| CH Accountancy Ltd | Professional & scientific | 2016 |
| CH Roofing & Building Contractors Ltd | Construction | 2025 |
| CH Studio Ltd | Professional & scientific | 2024 |
| CH4 Heating Ltd | Administrative & support | 2016 |
| Chaarge Ltd | Information & communication | 2019 |
| Chakkal Transport Limited | Transport & logistics | 2023 |
| Chammare Global Logistics Ltd | Transport & logistics | 2022 |
| Championn Roofing Limited | Construction | 2025 |
| Champneys Family Ltd | Extraterritorial | 2025 |
| Chandler Carpentry & Construction Limited | Construction | 2019 |
| Chandler Link Limited | Professional & scientific | 1997 |
| Chandler Skip Hire Ltd | Water & waste | 2018 |
| Chandler Tuck Limited | Professional & scientific | 2002 |
| Changemaker Associates Limited | Professional & scientific | 2017 |
| Channel Commercials Holdings Limited | Professional & scientific | 2000 |
| Channel Commercials Kent Ltd | Professional & scientific | 2006 |
| Channel Commercials PLC | Wholesale & retail | 1987 |
| Channel MEP Limited | Professional & scientific | 2022 |
| Channel Woodcraft 2005 Limited | Real estate | 1938 |
| Channel Woodcraft Limited | Real estate | 2005 |
| Chantelle Morgan Limited | Wholesale & retail | 2020 |
| Chaos to Calm Coaching Ltd | Health & social care | 2026 |
| Chaplin Homes and Investments Limited | Real estate | 2024 |
| Chapter Enterprises Limited | Real estate | 2017 |
| Charcoal Grill Ashford Ltd | Hospitality | 2019 |
| Charing Practice Limited | Wholesale & retail | 1997 |
| Charing Spice Limited | Hospitality | 2023 |
| Charles Lake Limited | Real estate | 2011 |
| Charles Oliver Consultancy Ltd | Professional & scientific | 2021 |
| Charm Sports Ltd | Education | 2024 |
| Charmille Court (Ashford) Management Limited | Households | 2002 |
| Chart Arenas Limited | Construction | 2021 |
| Chart Fabrication Engineers Limited | Professional & scientific | 1985 |
| Chart Garages Limited | Extraterritorial | 2011 |
| Chart Stables Limited | Manufacturing | 1994 |
| Chart Timber Buildings Limited | Extraterritorial | 2011 |
| Chartac Management Limited | Real estate | 2007 |
| Chartaless Ltd | Information & communication | 2026 |
| Chartam Tech Limited | Wholesale & retail | 2020 |
| Chartered Developments (Surrey) Limited | Construction | 2007 |
| Chartered Financial Planners Limited | Professional & scientific | 2007 |
| Chartfield (Kent) Limited | Real estate | 2024 |
| Chartway Janitorial Limited | Wholesale & retail | 2001 |
| Chartwood Design Limited | Manufacturing | 2009 |
| Chasara Holdings Limited | Extraterritorial | 2019 |
| Chatfield Medical Ltd | Professional & scientific | 2017 |
| Chatsworth Construction Limited | Construction | 1996 |
| Chatu LK Limited | Information & communication | 2015 |
| Chaucer Way (South) Residents Association Limited | Households | 1979 |
| Chaya Living Ltd | Administrative & support | 2017 |
| Chayareign Couriers Ltd | Transport & logistics | 2025 |
| CHC Concepts Ltd | Construction | 2025 |
| Check My Label Limited | Administrative & support | 2019 |
| Cheesemans Farm Ltd | Other services | 2018 |
| Cheffrey Court (Freehold) Ltd | Real estate | 2004 |