| Celebrations London Limited | Hospitality | 2014 |
| Celestial Living Co Ltd | Hospitality | 2015 |
| Celestrion Circle Ltd | Professional & scientific | 2025 |
| Celledge Ltd | Information & communication | 2017 |
| Celltechuk Limited | Wholesale & retail | 2022 |
| Celsius London Limited | Administrative & support | 2025 |
| Cendre & OR Ltd | Information & communication | 2025 |
| Centari Limited | Information & communication | 2010 |
| Central Learner Ltd | Administrative & support | 2026 |
| Central Smirk Ltd | Arts & recreation | 2026 |
| Central Southern Vintage Agricultural Club | Other services | 2004 |
| Central Stores Family Ltd | Administrative & support | 2017 |
| Centre Caterers Limited | Hospitality | 2019 |
| Centred Care Ltd | Health & social care | 2025 |
| Century Cars Limited | Other services | 2013 |
| Cerebro Services Ltd | Construction | 2025 |
| Certa Electrical Limited | Construction | 2015 |
| Certus Freight Forwarding Ltd | Transport & logistics | 2026 |
| CFI Academy CIC | Information & communication | 2020 |
| CFI Media Ltd | Information & communication | 2025 |
| CG Control Services Ltd | Professional & scientific | 2025 |
| Cgcco Ltd | Other services | 2025 |
| CGG Services (UK) Limited | Professional & scientific | 2009 |
| Chadcombe Healthcare Limited | Health & social care | 2020 |
| Chagossian Artistic Legacy (CAL) CIC | Information & communication | 2024 |
| Chagossian Empowerment Development Office CIC | Hospitality | 2025 |
| Chai Neten Vitamin Ltd | Wholesale & retail | 2025 |
| Chaiistan Ltd | Hospitality | 2023 |
| Chameleon Education Consultancy Ltd | Professional & scientific | 2018 |
| Chameleon Properties Limited | Construction | 2006 |
| Champion Garage Ltd | Wholesale & retail | 2024 |
| Chandlers Forecourt Limited | Wholesale & retail | 2017 |
| Chanelle Gray Inclusion Ltd | Administrative & support | 2023 |
| Change Connectors Limited | Administrative & support | 2024 |
| Change Management Partners UK Ltd | Information & communication | 2023 |
| Changefirst Limited | Administrative & support | 1995 |
| Channelplast Limited | Wholesale & retail | 2013 |
| Chaou Services Limited | Construction | 2025 |
| Chapel Lane Residents Ltd | Households | 2020 |
| Charasam Care Limited | Health & social care | 2014 |
| Charcoal Burner Limited | Hospitality | 2006 |
| Chard Services Limited | Extraterritorial | 1978 |
| Charge Electrical Solutions Ltd | Construction | 2020 |
| Charis Services for Children Ltd | Health & social care | 2020 |
| Charisma Leisure Limited | Arts & recreation | 2001 |
| Charles Ashley Kitchens Limited | Construction | 2021 |
| Charles at Stilwells Ltd | Wholesale & retail | 2023 |
| Charlie Car Wash Limited | Other services | 2007 |
| Charlie Hobbs Ltd | Manufacturing | 2023 |
| Charlotte Saunders Interiors Limited | Other services | 2018 |
| Charlton Dental Care Limited | Health & social care | 2007 |
| Charlton Industrial Services Limited | | 1965 |
| Charlwood Close Residents Association Limited | Households | 2000 |
| Charmajesty Limited | Wholesale & retail | 2014 |
| Charnwood Pet Products Limited | Manufacturing | 2025 |
| Charson Electrical Ltd | Construction | 2022 |
| Charvi Panvi Hospitality Ltd | Hospitality | 2025 |
| Chase Bookkeeping Services Ltd | Professional & scientific | 2026 |
| Chase Leasehold Management Ltd | Real estate | 2016 |
| Chase&Simpson Ltd | Professional & scientific | 2020 |
| Chatham Distribution Ltd | Hospitality | 2024 |
| Chatsworth Drive Management Company Limited | Households | 2004 |
| Chaudhari Pizza Limited | Hospitality | 2026 |
| Chauffeurology Limited | Transport & logistics | 2024 |
| Chavasse Apartments RTM Company Limited | Households | 2024 |
| Cheap Deal Center Limited | Administrative & support | 2023 |
| Cheeky PUB Company Limited | Hospitality | 2015 |
| Cheers Mate Productions Limited | Information & communication | 2018 |
| Chefnest Ltd | Wholesale & retail | 2026 |
| Chemigraphic (Bidco) Limited | Financial services | 2019 |
| Chemigraphic (Topco) Limited | Financial services | 2019 |
| Chemigraphic Limited | Manufacturing | 1972 |
| Chemiplast Ltd | Other services | 2025 |
| Chequer Mead Trading Ltd | Wholesale & retail | 2019 |
| Cherry B Consulting Limited | Professional & scientific | 2009 |
| Chesworths Estates Limited | Real estate | 2025 |
| Chettinad Mandarin Restaurant PVT Ltd | Hospitality | 2025 |
| Chibooks C.I.C. | Information & communication | 2023 |
| Chibs Entertainments Limited | Information & communication | 2025 |
| Chief Chicken Ltd | Hospitality | 2021 |
| Chikitos Crawley Ltd | Hospitality | 2023 |
| Chilworth Communications Ltd | Real estate | 1988 |
| China and Glass Direct Limited | Extraterritorial | 2004 |
| Chips Cane Ltd | Hospitality | 2022 |
| CHL Legacy Limited | Administrative & support | 2017 |
| Chloe's Emporium Ltd | Wholesale & retail | 2025 |
| Choice Courier Ltd | Transport & logistics | 2015 |
| Choices Acquisitions Limited | Real estate | 2002 |
| Choices Estate Agents Limited | Real estate | 1989 |
| Choices Home Sales (Crawley) Limited | Real estate | 1989 |
| Choices Home Sales Limited | Real estate | 2020 |
| Choices Lettings Limited | Real estate | 2020 |
| Choices New Homes Limited | Real estate | 2016 |
| Chopstix Brighton Limited | Real estate | 2014 |
| Chopstix Maidstone Limited | Real estate | 2014 |
| Chris Hopkins Electrical Ltd | Energy | 2012 |
| Chris-Dix-Chef Ltd | Professional & scientific | 2025 |
| Christensen Plastering Limited | Construction | 2024 |
| Christopher George Limited | Professional & scientific | 2011 |
| Chritel Healthcare Limited | Health & social care | 2008 |