| Century Cars Limited | Crawley | 2013 |
| Century Contracting Ltd | Redditch | 2024 |
| Century Galleries Limited | Henley-On-Thames | 1970 |
| Century Properties International Ltd | Croydon | 2012 |
| Century Restorations Ltd | Sidcup | 2019 |
| Century Watch Repairs Ltd | Stevenage | 2021 |
| Century Windows Limited | Uxbridge | 2003 |
| CEO African Caribbean Foods Limited | Camberley | 2026 |
| CEO CF Ltd | Cambridge | 2022 |
| CEO Club Global Ltd | London | 2023 |
| CEO Club London Ltd | London | 2023 |
| CEO Culture Exchange Inc Ltd | London | 2025 |
| CEO Cutz Ltd | Sheffield | 2024 |
| CEO Hair London Ltd | London | 2025 |
| CEO Investment Holdings Ltd | London | 2025 |
| CEO Sports Limited | Aberdeen | 2026 |
| Ceoclub Limited | Daventry | 2021 |
| Ceos Holdings Ltd | Doncaster | 2020 |
| Ceosignatures Ltd | Croydon | 2023 |
| Cepa Solutions Ltd | London | 2025 |
| Cepflo Limited | London | 2025 |
| Cephas Care Limited | Ipswich | 2003 |
| Cephas Resourcing Solutions Group Limited | London | 2016 |
| Ceramic City Stories C.I.C. | Crewe | 2015 |
| Ceramic Restoration Studios Limited | Newcastle | 2004 |
| Ceramica Elegance Limited | Gateshead | 2007 |
| Ceramick GAS & Property Care Ltd | Scunthorpe | 2018 |
| Cerastes Ltd | London | 2011 |
| Cerasus Munro Limited | London | 2020 |
| Ceravella Aesthetics Ltd | Dronfield | 2026 |
| Cerberus Enterprises Ltd | Darlington | 2015 |
| Cercle Entrepreneur Franco Tamoul | London | 2024 |
| Cercle Prive Limited | London | 2023 |
| Cercle Ruby Ltd | London | 2026 |
| Cerco Group Limited | Edinburgh | 2021 |
| Ceremo Ltd | St. Austell | 2025 |
| Ceremonial Events Ltd | Birmingham | 2023 |
| Ceremonies by Eunice Ltd | Brentford | 2026 |
| Ceremonies by FLY Limited | London | 2024 |
| Ceremony Beverage Company Limited | Harrow | 2019 |
| Ceren Barbers Ltd | Wantage | 2024 |
| Ceres & District Community Trust | Cupar | 2017 |
| Ceresmoh Ltd | Portsmouth | 2025 |
| Cereus Integrated Security Ltd. | Soham | 2019 |
| Cereus Nights Ltd | London | 2022 |
| Cereus Ultrasonics Limited | Aberdeen | 2018 |
| Ceri Davies, HV & Substation Services Limited | Neath | 2015 |
| Ceric Holdings Ltd | London | 2023 |
| Cerise Aesthetics & Beauty Ltd | Colchester | 2021 |
| Cernobbio Limited | Holywood | 2015 |
| Cerotreees Ltd | Whitehills Business Park | 2013 |
| Cerrajeros Valencia Origin-Go Ltd | London | 2024 |
| Cerri Hand Car Wash Ltd | Northampton | 2026 |
| Cerrito Services Ltd | Haverfordwest | 2023 |
| Cert Assist Limited | Bury | 2022 |
| Certa Global Ltd | London | 2024 |
| Certabuild Ltd. | Godalming | 2021 |
| Certainhome Property Management Limited | London | 1995 |
| Certainly Secure Limited | Newport | 2019 |
| Certainseek Limited | Staffordshire | 1987 |
| Certass Limited | Newcastle Upon Tyne | 2002 |
| Certass TA Limited | Newcastle Upon Tyne | 2018 |
| Certax Accounting (S.Bucks) Limited | Chesham | 2006 |
| Certex (Africa) Equatorial Guinea Limited | London | 2023 |
| Certi Cuts Ltd | Halifax | 2020 |
| Certi Fades Ltd | Rotherham | 2025 |
| Certi Fadez Ltd | Barking, London | 2021 |
| Certibuild Ltd | York | 2019 |
| Certifa Aesthetics Limited | Morden | 2019 |
| Certification Courses Ltd | London | 2017 |
| Certification Partner Global (UK) Ltd | Clitheroe | 2006 |
| Certified Accountants Educational Trustees Limited (the) | London | 1972 |
| Certified Cars Limited | High Wycombe | 2011 |
| Certified Collectibles Group - International UK Limited | Bloomsbury, London | 2018 |
| Certified Cuts Limited | Bristol | 2016 |
| Certified Cutz Limited | London | 2023 |
| Certified Drone Services Limited | Chelmsford | 2025 |
| Certified Public Accountants Association | Bolton | 1997 |
| Certified Restoration DRY Cleaning Network (Europe) Limited | Manchester | 2010 |
| Certified Restoration DRY Cleaning Network Limited | Manchester | 2010 |
| Certifiedads Digital Ltd | Cardiff | 2022 |
| Certisafe Ltd | London | 2026 |
| Certitude Consultants Limited | Manchester | 2014 |
| Certm Services Limited | Warrington | 2017 |
| Certo Interiors Ltd | Loughton | 2021 |
| Certora Limited | Chesterfield | 2017 |
| Certra Assist Limited | Arnold | 2024 |
| Certus Security UK Limited | Wrotham Heath | 2008 |
| Cerulean D&C Ltd | Bexley | 2021 |
| Cerulean Holdings Ltd | Bromley | 2025 |
| Cerulean Ventures Limited | Great Doddington | 2025 |
| Cervell Limited | Horsham | 2012 |
| Cerys Keneally Ltd | Bristol | 2011 |
| Cerys Stonefield Coaching Ltd | Dewsbury | 2025 |
| Cerys Tattoo Ltd | Altrincham | 2026 |
| Cesa Limited | London | 2008 |
| Cesar & Co Dog Walking Ltd | Peterborough | 2025 |
| Cesari Holdings Ltd | Wolverhampton | 2022 |
| Cesarverse Ltd | London | 2025 |
| Ceso Limited | Essex | 2000 |