| Campion Launches Limited | Transport & logistics | 2001 |
| Caney Networks Ltd | Information & communication | 2024 |
| Cannalytics Limited | Professional & scientific | 2023 |
| Cannon Cars Limited | Transport & logistics | 1996 |
| Canterbury Archaeological Trust Limited | Education | 1979 |
| Canterbury Insurance Brokers Limited | | 1969 |
| Canterbury Lambs Property Investment Company Limited | Real estate | 2007 |
| Canterbury Lighting Limited | Wholesale & retail | 1996 |
| Canterbury Masala Ltd | Extraterritorial | 2019 |
| Canterbury Masonic Charities Association Limited | Health & social care | 1992 |
| Canterbury Takeaway Ltd | Hospitality | 2024 |
| Canó Healthcare Ltd | Wholesale & retail | 2022 |
| Cape Verde Property Limited | Professional & scientific | 2005 |
| Capel Cladding Limited | Construction | 2003 |
| Capero Limited | Hospitality | 2022 |
| Capital Building Services (Kent) Limited | Wholesale & retail | 2006 |
| Capital City Property Investments Ltd | Construction | 2016 |
| Capital Property UK Limited | Construction | 2007 |
| Capsa Accounting Limited | Professional & scientific | 2006 |
| Captain Crikey Limited | Professional & scientific | 2000 |
| Captain's Cabin Sevenoaks Limited | Wholesale & retail | 2002 |
| Car Designs | Manufacturing | 2004 |
| Care & Quality Electrical Limited | Construction | 2018 |
| Care Catalyst Limited | Administrative & support | 2024 |
| Care Pro (South East) Limited | Health & social care | 2006 |
| Care Prop 2 Ltd | Real estate | 2026 |
| Care Prop Ltd | Real estate | 2026 |
| CARE591 Ltd | Professional & scientific | 2019 |
| Carholme Properties Limited | Construction | 1987 |
| Caringcove Ltd | Health & social care | 2023 |
| Carlin Music Delaware LLC | | 2017 |
| Carlin Music Delaware LLC | | 2023 |
| Carlton Motors Limited | Transport & logistics | 1984 |
| Carnelian Business Services Limited | Administrative & support | 2003 |
| Carp Limited | Administrative & support | 1998 |
| Carpe Diem 2001 Ltd | Wholesale & retail | 2001 |
| Carpet Supplies London Limited | Wholesale & retail | 1997 |
| Carson & Sons Limited | Real estate | 2002 |
| Carstairs Psychological Associates Limited | Health & social care | 2005 |
| Cartel Consulting Ltd | Real estate | 1995 |
| Carter Manning Ltd | Real estate | 2023 |
| Cartref Homes UK Limited | Health & social care | 2003 |
| Casama Care Ltd | Health & social care | 2019 |
| Casscon Limited | Manufacturing | 1981 |
| Castdove Limited | | 1983 |
| Castelli Milano 1938 Limited | Other services | 1994 |
| Castle Green (Dagenham) Management Company Limited | Households | 1989 |
| Castle Terrace (Beckenham) Management Limited | Professional & scientific | 2000 |
| Castlehurst Properties Limited | Real estate | 2003 |
| Castlewall Limited | Financial services | 1992 |
| Caststream 07 Limited | Real estate | 2007 |
| Catalyst Trades Limited | Wholesale & retail | 2023 |
| Catsheba Limited | Real estate | 1978 |
| Cavern Electrical and Mechanical Services Limited | Construction | 2005 |
| CC Cousins Limited | Construction | 2000 |
| CCS Scaffolding Trustee Ltd | Other services | 2024 |
| CED BJ Vigo Limited | Real estate | 2016 |
| Cedarsquare Limited | Real estate | 2002 |
| Cedrus Homes Ltd | Construction | 2004 |
| Ceejay Electrical Limited | | 1980 |
| Celtic Tigress Limited | Administrative & support | 2005 |
| Cempa Ltd | Administrative & support | 2025 |
| Central European News Limited | Information & communication | 1997 |
| Central Property Holdings Limited | Professional & scientific | 1964 |
| Centurion Park Ltd | Wholesale & retail | 1997 |
| CEO Business Consultancy Limited | Professional & scientific | 2014 |
| Certified CPD Ltd | Professional & scientific | 2023 |
| Certified Systems Ltd | Information & communication | 1997 |
| Certsys Ltd | Extraterritorial | 2004 |
| CFJ Jewellery Limited | Administrative & support | 2025 |
| CGC Partners | | 1991 |
| Cgrs Properties Limited | Construction | 2004 |
| CH Properties Limited | Real estate | 2002 |
| Chadwell Heath "a" Flat Management Limited | Professional & scientific | 1987 |
| Chadwell Heath "B" Flat Management Limited | Professional & scientific | 1987 |
| Chadwell Heath "B" Management Limited | Professional & scientific | 1984 |
| Chadwell Heath "C" Management Limited | Professional & scientific | 1984 |
| Chadwell Heath "D" Management Limited | Professional & scientific | 1985 |
| Chadwell Heath "E" Management Limited | Professional & scientific | 1985 |
| Chadwell Heath "F" Management Limited | Professional & scientific | 1985 |
| Chadwicks (Faversham) Limited | Other services | 1994 |
| Chaletline Limited | Professional & scientific | 2000 |
| Chalk Limited | Professional & scientific | 2011 |
| Chamlaw (Bexleyheath) Limited | Real estate | 1961 |
| Champion Financial Advisors Limited | Financial services | 1999 |
| Chandos Road Residents Limited | Households | 1998 |
| Channel Tunnel Group Limited(The) | Transport & logistics | 1984 |
| Chanon Financial Services Limited | Arts & recreation | 1985 |
| Chantry Place Management Company (Sevenoaks) Limited | Households | 2004 |
| Chapel Place Management Limited | Households | 2001 |
| Chapelton Board Sales Limited | Wholesale & retail | 1985 |
| Chapta Consultancy Limited | Professional & scientific | 2007 |
| Chapter One Residential Lettings and Property Management Ltd | Real estate | 2015 |
| Chargeguard Limited | Real estate | 1996 |
| Charles D Smith & Associates Ltd | Professional & scientific | 2004 |
| Charles Dean Developments Limited | Construction | 2004 |
| Charles Drive Management Company Limited | Professional & scientific | 2005 |
| Charles Edward London Ltd | Professional & scientific | 2019 |
| Charles River Laboratories Holdings Limited | Professional & scientific | 1999 |
| Charles River U.K. Limited | Professional & scientific | 1969 |