| Crimson Peak Limited | Professional & scientific | 2012 |
| Crimson Social Ltd | Arts & recreation | 2023 |
| Crimson Wave Limited | Administrative & support | 2025 |
| Crimsonfall Ltd | Transport & logistics | 2019 |
| Cringate Engineering Limited | Manufacturing | 1973 |
| Cringle Corporation Limited | Real estate | 1946 |
| Cringle Green Limited | Real estate | 2025 |
| Cringle Investment Limited | Real estate | 1985 |
| Crismarco Ltd | Professional & scientific | 2019 |
| Crisp Addict UK Ltd | Extraterritorial | 2025 |
| Crisp.Pint PUB Co Ltd | Hospitality | 2025 |
| Crisper's Fried Chicken Ltd | Hospitality | 2023 |
| Crispin Invest (1) Ltd | Real estate | 2022 |
| Crispin Invest (2) Ltd | Real estate | 2022 |
| Crispin Medical UK Ltd | Wholesale & retail | 2022 |
| Crisplink Limited | Hospitality | 2001 |
| Crispy Bites Limited | Hospitality | 2020 |
| Crispy Chicken & Pizza Bite Ltd | Hospitality | 2026 |
| Crispy COD Denton Ltd | Hospitality | 2019 |
| Crispy COD Town Lane Ltd | Hospitality | 2019 |
| Crispy Way Ltd | Hospitality | 2025 |
| Crista Galli Ltd | Real estate | 2021 |
| Cristian Company Group Ltd | Wholesale & retail | 2019 |
| Cristian Corporation Limited | Wholesale & retail | 2019 |
| Cristian Stefan Ltd | Transport & logistics | 2026 |
| Cristin Ltd | Construction | 2017 |
| Crit Think Limited | Education | 2024 |
| Critchcorp Computers Ltd | Information & communication | 2006 |
| Critchley Hygiene Limited | Health & social care | 2026 |
| Criterion Solutions Limited | Information & communication | 2005 |
| Critical Brain Limited | Health & social care | 2019 |
| Critical Cleaning Ltd | Administrative & support | 2025 |
| Critical Path Management Solutions Ltd | Professional & scientific | 2021 |
| Critical Practical Ltd | Education | 2021 |
| Critical Social Policy Limited | Information & communication | 1981 |
| Crixtal Limited | Health & social care | 2006 |
| CRK Catering Ltd | Hospitality | 2022 |
| CRL Homes Ltd | Real estate | 2022 |
| CRL SPV 2 Limited | Construction | 2019 |
| CRM Advisory Services Ltd | Professional & scientific | 2023 |
| CRO Property Limited | Real estate | 2025 |
| Croagh Tara Investments Ltd | Other services | 2019 |
| Crocus Prime Ltd | Hospitality | 2025 |
| Crocushawk Limited | Real estate | 2025 |
| Croesus Digital Marketing Limited | Information & communication | 2016 |
| Croft END Equestrian Centre Limited | Arts & recreation | 2012 |
| Croft House Ltd | Financial services | 2023 |
| Croft Market Ltd | Wholesale & retail | 2021 |
| Croft Mill Properties Ltd | Real estate | 2020 |
| Croft Sports & Classics Ltd | Wholesale & retail | 2021 |
| Croftex Engineering Ltd | Wholesale & retail | 1998 |
| Crofton House Ltd | Real estate | 2014 |
| Crofts B Road 3 Ltd | Extraterritorial | 2024 |
| Crofts Gardens Ltd | Administrative & support | 2026 |
| Crofts Property Management Services Limited | Real estate | 1993 |
| Croftvale Homes Limited | Extraterritorial | 2024 |
| Croi Counselling UK Ltd | Health & social care | 2025 |
| Croissance PR Ltd | Professional & scientific | 2025 |
| Croma Pizza Limited | Financial services | 2025 |
| Crombouke Media Ltd | Information & communication | 2025 |
| Cromer Management Ltd | Households | 2024 |
| Cromie Goods Limited | Wholesale & retail | 2025 |
| Cromie Limited | Financial services | 2003 |
| Cromley Estates Ltd | Real estate | 2024 |
| Crompton Care Ltd | Health & social care | 2025 |
| Crompton Estates & Investments Ltd | Real estate | 2025 |
| Crompton Facilities Maintenance Ltd | Construction | 2025 |
| Crompton Gate (Management) Limited | Households | 2009 |
| Crompton TV Limited | Administrative & support | 2014 |
| Cromptons Limited | Hospitality | 2001 |
| Cromwell Family Investment Company Limited | Financial services | 2025 |
| Croner Taxwise Limited | Extraterritorial | 1995 |
| Croner-I Limited | Extraterritorial | 2025 |
| Cronix Ltd | Wholesale & retail | 2017 |
| Cronus Building Solutions Ltd | Construction | 2020 |
| Cronys Foundation | Public administration | 2020 |
| Crookedtie UK Ltd | Wholesale & retail | 2025 |
| Crookes Technologies Limited | Information & communication | 2023 |
| Crookes Walker Consulting Limited | Construction | 2004 |
| Crookes Walker Trustees Limited | Other services | 2020 |
| Crookies and Creme Ltd | Hospitality | 2025 |
| Crop Radio Ltd | Information & communication | 2024 |
| Crop Spraying Ltd | Agriculture & fishing | 2018 |
| Cropcompass Limited | Wholesale & retail | 2018 |
| Crosbie Medical Limited | Health & social care | 2019 |
| Crosby Evans Limited | Administrative & support | 2019 |
| Crosby Practice Limited | Health & social care | 2023 |
| Crosby Private Hospital Ltd. | Professional & scientific | 2009 |
| Crosbyfba Ltd | Wholesale & retail | 2026 |
| Crosland SDS Limited | Manufacturing | 2013 |
| Crosland VK Limited | Water & waste | 1990 |
| Cross Club Events Ltd | Administrative & support | 2026 |
| Cross Keys Developments Ltd | Real estate | 2020 |
| Cross Lane Convenience Store Ltd | Wholesale & retail | 2013 |
| Cross Roar Limited | Wholesale & retail | 2024 |
| Cross Street Management Limited | Administrative & support | 1965 |
| Cross Street Properties 1 Ltd | Professional & scientific | 2018 |
| Cross Street Properties 2 Ltd | Professional & scientific | 2018 |
| Crossacres Holding Limited | Real estate | 2025 |
| Crossacres Primary Academy | Education | 2014 |