| Chelm Homes Limited | Construction | 2025 |
| Chelm Limited | Construction | 2023 |
| Chelsea Nails Art Ltd | Other services | 2025 |
| Chelsea Trackers Limited | Construction | 2025 |
| Chennick Limited | Construction | 2024 |
| Chequers (Kent) Limited | Professional & scientific | 1988 |
| Chequers Park Management Limited | Households | 1969 |
| Cheri Nails Bar Ltd | Other services | 2021 |
| Cherry Gardens Residents Company Limited | Real estate | 2005 |
| Cherry Tree Farm Salads & Herbs Ltd | Agriculture & fishing | 2010 |
| Cherrymark Ltd | Wholesale & retail | 2025 |
| Cherrys Carpentry Ltd | Construction | 2022 |
| Cherrytree Nursery School Limited | Education | 2003 |
| Chertsey Masonic Hall Management Committee Limited | Other services | 2015 |
| Chevre CLO Ltd | Wholesale & retail | 2024 |
| CHI Productions Limited | Information & communication | 2021 |
| Chicken City Ashford Ltd | Hospitality | 2022 |
| Chieftain Investments Limited | Professional & scientific | 2003 |
| Chiesa Property Limited | Real estate | 2008 |
| Chilbolton Logistics Ltd | Transport & logistics | 2014 |
| Childale Limited | Professional & scientific | 2002 |
| Children First Ltd | Health & social care | 2025 |
| Chill Pill Management LLP | | 2021 |
| Chilmington Management Organisation | Professional & scientific | 2019 |
| Chilton Buckthorpe Consulting Limited | Other services | 2019 |
| Chimney Cake Shop Ltd | Hospitality | 2019 |
| Chimney Power Sweeping Berkshire Ltd | Administrative & support | 2026 |
| Chindit Limited | Other services | 2011 |
| Chinta Group (Kent) Ltd | Construction | 2023 |
| Chinwag Communications Ltd | Professional & scientific | 2017 |
| Chiply Financial Services Limited | Financial services | 2026 |
| Chipstead Property Holding Kent (JC) Limited | Real estate | 2021 |
| Chique Beauty Limited | Other services | 2006 |
| Chit (Caring Hands Independent Team) Ltd | Health & social care | 2025 |
| Chitimawill Ltd | Health & social care | 2023 |
| Chiznon Ltd | Administrative & support | 2025 |
| Chongbang Ltd | Real estate | 2025 |
| Chopra Newsagent Limited | Wholesale & retail | 2007 |
| Chops Hospitality Limited | Professional & scientific | 2023 |
| Chris Canderton & SON Limited | Construction | 2002 |
| Chris Derby Limited | Professional & scientific | 2015 |
| Chris Wells Electrical Services Ltd | Construction | 2015 |
| Chris Wiggins Shoeing Limited | Agriculture & fishing | 2003 |
| Chris Wood Golf Ltd | Arts & recreation | 2010 |
| Chrismay Management Services Ltd | Administrative & support | 2021 |
| Christian Builders (Margate) Limited | Construction | 2019 |
| Christian Estates (Margate) Ltd | Real estate | 2026 |
| Christian Lawrence Architects Limited | Professional & scientific | 2015 |
| Christine Court Residents Association Ashford Limited | Households | 2011 |
| Christlike Events Limited | Hospitality | 2024 |
| Christopher Ball & Daughters Ltd | Water & waste | 2013 |
| Christopher Ball & SON Ltd | Wholesale & retail | 2013 |
| Christopher Court (Ashford) Management Co. Ltd. | Professional & scientific | 1990 |
| Christopher James Events Ltd | Administrative & support | 2015 |
| Christopher Smith Communications Limited | Information & communication | 2004 |
| Chroma Controls Ltd | Professional & scientific | 2013 |
| Chronos Management Consultants Ltd | Information & communication | 2006 |
| Chrysalis Computer Solutions Limited | Information & communication | 2000 |
| Chuchuro Limited | Information & communication | 2017 |
| Chun WAH (JL) Limited | Hospitality | 2022 |
| Church Court (Seasalter) Limited | Households | 2020 |
| Church Hill House Ltd | Financial services | 2020 |
| Church Meadow (Management) Limited | Hospitality | 1981 |
| Churchbury Place Property Management Limited | Real estate | 2002 |
| Ciao Publishing Limited | Information & communication | 2020 |
| CIG Commodities Ltd | Wholesale & retail | 2026 |
| Cinque Ports Magazines RYE Limited | Information & communication | 2011 |
| Cinque Ports Mobility Limited | Administrative & support | 1998 |
| Cinque Ports Sailing Club CIC | Education | 2025 |
| Cinque Ports Sailing Limited | Education | 2014 |
| CIRCA1990 Ltd | Wholesale & retail | 2016 |
| Circainvestment Limited | Real estate | 2020 |
| Citi Nests Boughton Limited | Real estate | 2018 |
| Citi Nests Developments Limited | Real estate | 2018 |
| Citi Nests Goose Farm Limited | Real estate | 2018 |
| Citi Nests Staple Limited | Real estate | 2015 |
| Citi Nests Sturry Limited | Real estate | 2017 |
| Citta Care Ltd | Health & social care | 2020 |
| Citta Group Holdings Limited | Financial services | 2024 |
| Citta Housing Limited | Real estate | 2022 |
| Citta Properties Kent Ltd | Real estate | 2024 |
| City Cribs Global Limited | Real estate | 2019 |
| City Escapes Limited | Administrative & support | 2018 |
| City Escapes Sussex LLP | | 2004 |
| Citygo Cars Ltd | Transport & logistics | 2016 |
| Citylearn Ltd | Real estate | 2025 |
| Civicare (Beds Herts & Bucks) Ltd | Administrative & support | 1999 |
| Civicare Ltd | Administrative & support | 2024 |
| Civilink Limited | Professional & scientific | 2024 |
| Civilogics International Ltd | Construction | 2019 |
| CJ Collection London Limited | Wholesale & retail | 2020 |
| CJ Diamond Consulting Ltd | Professional & scientific | 2019 |
| CJ LEE Services Ltd | Administrative & support | 2019 |
| CJ Scaffolding Ltd | Construction | 2022 |
| CJ Smith Groundworks & Civil Engineering Limited | Construction | 2022 |
| CJ Wellings Ltd | Information & communication | 2004 |
| Cjcp Ltd | Administrative & support | 2025 |
| CJE Systems Ltd | Construction | 2019 |
| CJH Electrical Ltd. | Professional & scientific | 2017 |
| CJL Electrical&Controls Ltd | Construction | 2025 |