| Centretrade Limited | Wholesale & retail | 1993 |
| Centring Ltd | Construction | 2024 |
| Centro Galego (Social and Cultural Society) DE Londres Limited | Other services | 2002 |
| Centro Galego Restaurant Limited | Hospitality | 2025 |
| Centrum Care Limited | Information & communication | 2021 |
| Centrum International Limited | Wholesale & retail | 2021 |
| Centum Law Limited | Professional & scientific | 2023 |
| Centurion Health Care Limited | Health & social care | 2004 |
| Centurion SB Ltd | Real estate | 2017 |
| Century Agile Ltd | Information & communication | 2025 |
| Century Cricket Hub Limited | Wholesale & retail | 2021 |
| Century Group Ltd | Administrative & support | 2019 |
| Century Hire Limited | Hospitality | 2014 |
| Century House Management Limited | Households | 1989 |
| Centuryscents Limited | Wholesale & retail | 2025 |
| CEO Construction Ltd | Construction | 2022 |
| CEP UK Properties Limited | Real estate | 2026 |
| Cequens LLP | | 2014 |
| Ceraconstruct Ltd | Construction | 2026 |
| Cercis Investments LLP | | 2024 |
| Ceremony Beverage Company Limited | Other services | 2019 |
| Certified Renewable Solutions Limited | Construction | 2024 |
| Ceutabio Limited | Health & social care | 2005 |
| Ceylon Advertising Limited | Information & communication | 2018 |
| Ceylon Choice Ltd | Hospitality | 2018 |
| Ceylon Exclusive Ltd | Wholesale & retail | 2024 |
| Ceylon Hopper Ltd | Hospitality | 2025 |
| Ceylon Products UK Ltd | Wholesale & retail | 2016 |
| Ceylon Samayal Ltd | Hospitality | 2022 |
| Ceylon Sizzle Ltd | Hospitality | 2022 |
| Ceylon Spice Limited | Hospitality | 2023 |
| Ceylon Tea Market Limited | Manufacturing | 2024 |
| Ceylonz Origin Limited | Manufacturing | 2025 |
| Ceylura Ltd | Wholesale & retail | 2025 |
| Cf.Superior Ltd | Real estate | 2021 |
| CFA Construction Ltd | Construction | 2020 |
| CFA Property Services Limited | Construction | 2014 |
| CFH Holdings Limited | Financial services | 1990 |
| Cfig Limited | Financial services | 2025 |
| CFO Hub Services Limited | Professional & scientific | 2022 |
| CFS DRY Ltd | Construction | 2019 |
| Cfssas Ltd | Information & communication | 2020 |
| CFV Direct Limited | Wholesale & retail | 2013 |
| CG Comms Limited | Administrative & support | 2025 |
| CG Knight Consultancy Limited | Professional & scientific | 2015 |
| CG Plumbing (Herts) Limited | Construction | 2021 |
| CG Power Services Ltd | Construction | 2025 |
| CG786 Limited | Hospitality | 2024 |
| Cgsc Galacticos Ltd | Financial services | 2013 |
| CH2 Solutions Ltd | Construction | 2015 |
| CHA CHA DUM DUM Ltd | Wholesale & retail | 2025 |
| Chacha Bhatija Ltd | Manufacturing | 2025 |
| Chada Properties Ltd | Real estate | 2016 |
| Chadley Electrical Ltd | Manufacturing | 2024 |
| Chadley Estate Management Ltd | Administrative & support | 2017 |
| Chadley Group Limited | Construction | 2015 |
| Chadley Holdings Ltd | Professional & scientific | 2025 |
| Chadley Investments Ltd | Real estate | 2025 |
| Chadley Wolfson Properties Limited | Real estate | 2021 |
| Chaga Properties Limited | Real estate | 1964 |
| Chahal (London) Ltd | Transport & logistics | 2019 |
| Chai Biryani Ltd | Hospitality | 2024 |
| Chai Patti Limited | Wholesale & retail | 2020 |
| Chai Sutta Bar UK Limited | Hospitality | 2021 |
| Chai Tea N Spice Ltd | Manufacturing | 2021 |
| Chai Veda Limited | Manufacturing | 2025 |
| Chainkey Limited | Real estate | 2004 |
| Chainnelize Solutions Ltd | Professional & scientific | 2012 |
| Chairman Corporation Ltd | Professional & scientific | 2025 |
| Chaitanya Invest Ltd | Real estate | 2019 |
| Chak HAN Food Limited | Wholesale & retail | 2025 |
| Chakaboom Ltd | Information & communication | 2026 |
| Chalk & Cheese Design Ltd | Professional & scientific | 2009 |
| Chalo Holiday Limited | Administrative & support | 2010 |
| Chalukya Limited | Wholesale & retail | 2025 |
| Chamak Business Services Ltd | Wholesale & retail | 2022 |
| Chamarel Community Care Ltd | Health & social care | 2025 |
| Chamarel Healthcare Ltd | Health & social care | 2017 |
| Chamarel Holdings Ltd | Real estate | 2017 |
| Chamarel Support Ltd | Health & social care | 2025 |
| Chamberlain Commercial (UK) Limited | Administrative & support | 2005 |
| Chamberlain Estates Limited | Real estate | 1989 |
| Chameleon Systems Holdings Limited | Financial services | 2018 |
| Chameleon Systems Ltd. | Construction | 1993 |
| Champ & Champion’S Company Ltd | Wholesale & retail | 2019 |
| Champ Together Limited | Education | 2024 |
| Champagne Celebrations Limited | Administrative & support | 2002 |
| Chancellors Financial Services Limited | Extraterritorial | 2000 |
| Chancerygate (Colnbrook) Management Company Limited | Professional & scientific | 2006 |
| Chanctonbury Rights Limited | Information & communication | 2020 |
| Chandlers (GB) Limited | Construction | 2013 |
| Chandra Meals Ltd | Hospitality | 2025 |
| CHANDRAKUMAR20 Limited | Wholesale & retail | 2026 |
| Change and Go Limited | Other services | 2020 |
| Change Fashion UK Ltd | Wholesale & retail | 2022 |
| Change Sphere Advisors Ltd | Professional & scientific | 2025 |
| Changing Gardens Limited | Administrative & support | 2025 |
| Chania Construction Limited | Construction | 2016 |
| Channa Developments Limited | Construction | 2025 |
| Chanos Pro Ltd | Wholesale & retail | 2025 |