| CB Developments South East Limited | Construction | 2021 |
| CB Property Maintenance Limited | Construction | 2019 |
| CB ST Leonards Limited | Wholesale & retail | 2026 |
| Cbct UK Limited | Wholesale & retail | 2024 |
| CBL Fastenings Limited | Wholesale & retail | 2014 |
| CBT Sales & Marketing Consulting Ltd | Professional & scientific | 2024 |
| Cbwindowcleaning Ltd | Administrative & support | 2025 |
| CC Chauffeurs Ltd | Transport & logistics | 2020 |
| CC Countryside Ltd | Agriculture & fishing | 2022 |
| CC Mortgage Solutions Ltd | Financial services | 2024 |
| Ccconsultancy Ltd | Professional & scientific | 2023 |
| CCM Interiors Limited | Construction | 2016 |
| CCM Investments Limited | Households | 1995 |
| CCM Project Services Limited | Professional & scientific | 2000 |
| CD Automation UK Ltd | Wholesale & retail | 2008 |
| CDG Holdings Limited | Real estate | 2021 |
| Cearu Limited | Health & social care | 2025 |
| Cecil Court (Eastbourne) Limited | Households | 2023 |
| Ced/Arz Ltd | Hospitality | 2022 |
| Cedar Clinic Limited | Health & social care | 2006 |
| CEE VEE Engineering Limited | Professional & scientific | 1973 |
| Celtic Dental Specialists Ltd | Health & social care | 2026 |
| Cemed Limited | Health & social care | 2014 |
| Cemedhub Limited | Financial services | 2021 |
| Cemprop Ltd | Real estate | 2021 |
| Cento Consulting Ltd | Professional & scientific | 2024 |
| Central Advertising Limited | Professional & scientific | 2006 |
| Central Software Management Ltd | Information & communication | 2010 |
| Centre for Sport and Human Rights Limited | Other services | 2018 |
| Centre for Sport and Human Rights Trading Limited | Professional & scientific | 2021 |
| Cerberex Limited | Professional & scientific | 2003 |
| Certitude Projects Ltd | Construction | 2021 |
| Cerulisia Ltd | Administrative & support | 2024 |
| CF & EW Properties Ltd | Real estate | 2021 |
| Cffm Limited | Professional & scientific | 2001 |
| CFI Charitable Trust | Education | 2003 |
| CG Cafe & Foods Ltd | Hospitality | 2025 |
| CG Group Holdings Ltd | Financial services | 2023 |
| CG Investment Properties Ltd | Real estate | 2023 |
| CG Roofing and Cladding Ltd | Construction | 2019 |
| CG Stores Ltd | Wholesale & retail | 2021 |
| CG Traders Ltd | Wholesale & retail | 2023 |
| CGC2 Limited | Real estate | 2006 |
| CGM Project Management Ltd | Construction | 2021 |
| CGS Digital Ltd | Information & communication | 2014 |
| Chabra Estates Ltd | Real estate | 2023 |
| Chadwick Event Hire Limited | Administrative & support | 2025 |
| Chalk Architectural Services Ltd | Professional & scientific | 2026 |
| Chalk Dust Limited | Manufacturing | 2025 |
| Challenger Sails UK Ltd | Wholesale & retail | 2021 |
| Challinor Hall Ltd | Professional & scientific | 2014 |
| Chalumu Ltd | Wholesale & retail | 2025 |
| Chambers Medical Care Ltd. | Extraterritorial | 1996 |
| Chamonix Chalet Management Limited | Real estate | 2014 |
| Chancery Court Flat Management Limited | Extraterritorial | 2002 |
| Chancery Lane Leasehold Services Ltd | Other services | 2010 |
| Chandroday Estates Limited | Real estate | 2019 |
| Changing Places Developments Limited | Construction | 2020 |
| Chanh Limited | Other services | 2025 |
| Channel Graphic Communication Ltd | Information & communication | 2001 |
| Channel Graphic Ltd | Information & communication | 2024 |
| Channel View 21 Albany Road Seaford Limited | Households | 2005 |
| Chanteloupe Ltd. | Professional & scientific | 2008 |
| Chaos Media Ltd | Information & communication | 2011 |
| Chapman Wine Merchants Limited | Wholesale & retail | 2019 |
| Chaps (Polegate) Limited | Other services | 2007 |
| Chari T Solutions Limited | Professional & scientific | 1994 |
| Charisma Knot Ltd | Other services | 2019 |
| Charisse Cooke Associates Ltd | Other services | 2012 |
| Charles Alan Consulting Ltd | Real estate | 2016 |
| Charles Brocchi Limited | Manufacturing | 2023 |
| Charles COX Assets Limited | Real estate | 2020 |
| Charles COX Capital Limited | Real estate | 2020 |
| Charles COX Group Limited | Financial services | 2022 |
| Charles COX Lettings Limited | Real estate | 2022 |
| Charles COX Surveying Limited | Real estate | 2022 |
| Charles FOX Estate Agents Limited | Real estate | 2005 |
| Charles Orthopaedics Limited | Health & social care | 2018 |
| Charlewood Homes Ltd | Construction | 2026 |
| Charminster Dental Care Limited | Health & social care | 2019 |
| Charminster House Holdings Limited | Financial services | 2021 |
| Charminster House Properties Limited | Real estate | 2019 |
| Charter Investments Limited | Real estate | 2023 |
| Chartham Estates Limited Liability Partnership | | 2008 |
| Chartwell House (Eastbourne) RTM Company Limited | Households | 2008 |
| Chatsworth House (Devonshire Place) Limited | Households | 1992 |
| Chatu Properties Limited | Real estate | 2023 |
| Chawbrook Mews Management Company Limited | Households | 2001 |
| Chdp Limited | Health & social care | 2011 |
| Cheeky Smoke Lancing Limited | Wholesale & retail | 2017 |
| Cheeky Swank Ltd | Wholesale & retail | 2023 |
| Cheers Food Ltd | Hospitality | 2019 |
| Cheers Local MK Ltd | Wholesale & retail | 2018 |
| Cheesman Consulting Limited | Professional & scientific | 2018 |
| Chefbay Ltd | Hospitality | 2019 |
| Chefs Pantry Limited | Manufacturing | 2001 |
| Chelmsford Court Limited | Households | 1995 |
| Chelsea Court (Eastbourne) Residents Management Company Limited | Households | 2010 |
| Chelsea Lettings Ltd | Real estate | 2017 |
| Chemassist Limited | Transport & logistics | 2000 |