| Charlie Innes Limited | Construction | 2014 |
| Charlie's Angels Kitchens C.I.C. | Hospitality | 2020 |
| Charlwood Property Improvements Limited | Construction | 2008 |
| Chartway (Holdings) Limited | Administrative & support | 1997 |
| Charupe Consulting Limited | Professional & scientific | 2024 |
| Charupe Holdings LLP | | 2024 |
| Chaseoption Limited | Real estate | 1997 |
| Chasing Threads Ltd | Professional & scientific | 2018 |
| Chat EAU Consulting Ltd | Information & communication | 2023 |
| Chatagit Ltd | Administrative & support | 2012 |
| Chatelaine (UK) Ltd | Real estate | 2014 |
| Chater Consultants Limited | Professional & scientific | 2020 |
| Chater Enterprises LLP | | 2020 |
| Chatleadz Limited | Information & communication | 2020 |
| Chattell Developments Limited | Construction | 2014 |
| Chattell Estates Ltd | Real estate | 2005 |
| Chattell Holdings Limited | Real estate | 1994 |
| Chatterback Communications Ltd | Professional & scientific | 2015 |
| Checkgate Solutions Ltd. | Information & communication | 2020 |
| Cheeky Communications Limited | Professional & scientific | 2013 |
| Cheese Pizza Tunbridge Wells Limited | Hospitality | 2026 |
| Cheesious Pizza Ltd | Hospitality | 2026 |
| Chemicals Corporate Development Limited | Professional & scientific | 2018 |
| Cherry Gardens Farm Limited | Agriculture & fishing | 2016 |
| Cherry UK Limited | Information & communication | 2005 |
| Chesterfield House (Maintenance) Limited | Households | 1978 |
| Chests and Drawers (Kent) Ltd | Wholesale & retail | 2019 |
| CHI Labs Ltd | Information & communication | 2023 |
| Chichester Gardens Residents Association Limited | Households | 1967 |
| Chilcraft Interior Designs Limited | Professional & scientific | 2015 |
| Childrensalon Group Limited | Wholesale & retail | 2013 |
| Childrensalon Limited | Wholesale & retail | 2003 |
| Childrensalon Team Limited | Administrative & support | 2013 |
| Chillibang Media Limited | Information & communication | 2010 |
| Chilston House Residents Association Limited | Households | 2002 |
| Chilton Kite Consultants Limited | Professional & scientific | 2012 |
| Chimera Climbing Community CIC | Arts & recreation | 2025 |
| Chimera Climbing Holdings Limited | Arts & recreation | 2023 |
| Chinyatsi Limited | Health & social care | 2014 |
| Chislehurst Commercials Limited | Professional & scientific | 2001 |
| Chloe Newell Ltd | Real estate | 2021 |
| Choi Consulting Ltd | Information & communication | 2015 |
| Chops.E Limited | Information & communication | 2025 |
| Chris Arnold Builders Limited | Construction | 2014 |
| Chris Carter Ltd | Information & communication | 2025 |
| Chris Horseman Consulting Ltd | Arts & recreation | 2021 |
| Chris Hutchinson Consultants Ltd | Information & communication | 2019 |
| Chris Potter Country Sports Limited | Wholesale & retail | 2002 |
| Chris Scoble Limited | Administrative & support | 2017 |
| Chris Tarry Aviation Industry Research and Advisory Limited | Professional & scientific | 2002 |
| Chris-Manager Engineering Limited | Professional & scientific | 2025 |
| Christopher Sims Ltd | Real estate | 2023 |
| Christos Kampouris Ltd | Information & communication | 2020 |
| Chroma Vision Holdings Limited | Financial services | 2020 |
| Chronos Capital Limited | Financial services | 2022 |
| Chronos IT Consultancy Services Limited | Information & communication | 2011 |
| Church END Consultancy Ltd | Professional & scientific | 2018 |
| Cibum Limited | Other services | 2014 |
| CIBUS21 Engineering & Development Ltd | Professional & scientific | 2021 |
| CIBUS21 UK Limited | Manufacturing | 2021 |
| CIBUS25 H2 Ltd | Professional & scientific | 2025 |
| Cinder Track Productions Ltd | Information & communication | 2022 |
| Circa Group Limited | Administrative & support | 2009 |
| Circe Development Limited | Professional & scientific | 2011 |
| Circle Property Solutions Ltd | Real estate | 2019 |
| Cirrus Technologies Ltd | Information & communication | 2019 |
| Cite Building Services Southern Ltd | Construction | 2015 |
| Citrus Circle Accountancy Limited | Professional & scientific | 2019 |
| Citrus Group Hospitality Ltd | Hospitality | 2022 |
| City Planning Limited | Administrative & support | 2009 |
| City Security Council Community Interest Company | Administrative & support | 2022 |
| Ciurea Transport Ltd | Administrative & support | 2020 |
| Civil and Build Solutions Limited | Professional & scientific | 2016 |
| Ciya Ltd | Hospitality | 2021 |
| CJ Wood Consulting Limited | Professional & scientific | 2017 |
| CJM Plumbing & Heating Ltd | Construction | 2023 |
| CJS Property Ltd | Professional & scientific | 2025 |
| CJT Wedding Photography Ltd | Professional & scientific | 2024 |
| CK Resource Ltd | Administrative & support | 2021 |
| Cla-Val UK Ltd | Manufacturing | 1965 |
| Claire Marshall Ltd | Health & social care | 2018 |
| Clan & Coast Property Limited | Real estate | 2025 |
| Clan Asset Management Limited | Professional & scientific | 2018 |
| Clanricarde Gardens Ltd | Households | 2019 |
| Clare Court Management (Cambridge Gardens) Limited | Real estate | 2004 |
| Clareabelles Property Management Limited | Administrative & support | 2016 |
| Claremont Court (Tunbridge Wells) Management Limited | Households | 2003 |
| Clarence & Partners Ltd | Construction | 2025 |
| Clarendon Way (Green) Limited | Real estate | 2013 |
| Clarety Marketing Ltd | Professional & scientific | 2023 |
| Clarion Engineering Ltd | Professional & scientific | 2026 |
| Clarityuk Limited | Professional & scientific | 2012 |
| Clarkson Builders Limited | Construction | 1997 |
| Clarkson Joinery & Furniture Ltd | Manufacturing | 2013 |
| Clasp Holdings Ltd | Financial services | 2018 |
| Clatterford Holdings Limited | Financial services | 2019 |
| Claude Hooper Holdings Limited | Financial services | 2020 |
| Claude Hooper Investments Limited | Real estate | 2019 |
| Claude Hooper Limited | Construction | 1971 |
| Clausegate Limited | Professional & scientific | 1980 |