| Crestwell Business Support Ltd | Administrative & support | 2026 |
| Crestwood Developments Ltd | Construction | 2024 |
| Crestwynn Limited | Construction | 2024 |
| Crestyle Ltd | Wholesale & retail | 2025 |
| Cresuna Ltd | Wholesale & retail | 2024 |
| Creswell Properties Limited | Real estate | 2015 |
| Cretec Limited | Wholesale & retail | 2024 |
| Creu Geiriau CYF. | Information & communication | 2026 |
| Crewbook Solutions Ltd | Information & communication | 2020 |
| Crewe PUB Co Ltd | Hospitality | 2017 |
| Crewline Haulage Ltd | Transport & logistics | 2023 |
| Crewnado Ltd | Information & communication | 2024 |
| CRH Pubs Ltd | Hospitality | 2022 |
| Cribiedi Ltd | Real estate | 2025 |
| Cribyn Capital Limited | Construction | 2026 |
| Crichton House RTM Company Limited | Households | 2012 |
| Crickdental Ltd | Health & social care | 2020 |
| Cricket Players Association of Moulvibazar UK | Arts & recreation | 2021 |
| Cricketwales Limited | Arts & recreation | 2007 |
| Crickhowell Contractors Limited | Construction | 1995 |
| Crigio Services Ltd | Public administration | 2020 |
| Crikem Consulting Ltd | Financial services | 2015 |
| Crimson Grey Limited | Professional & scientific | 2023 |
| Crimson Path Saas Ltd | Information & communication | 2025 |
| Crinicle Aesthetics Ltd | Other services | 2024 |
| Cripple Creek Limited | Hospitality | 2006 |
| Cris Building Ltd | Other services | 2018 |
| Cris Express Ltd | Transport & logistics | 2016 |
| Criseren Capital Limited | Professional & scientific | 2010 |
| Criseren Engineering Limited | Professional & scientific | 2019 |
| Criseren Foods 2 Limited | Manufacturing | 2017 |
| Criseren Foods Limited | Manufacturing | 2010 |
| Criseren Investments Limited | Financial services | 2006 |
| Criseren Limited | Professional & scientific | 2010 |
| Criseren Management Limited | Professional & scientific | 2013 |
| Criseren Properties 2 Limited | Professional & scientific | 2023 |
| Criseren Properties Limited | Professional & scientific | 2002 |
| Criseren Treasury Limited | Financial services | 2026 |
| Crisisloop Limited | Information & communication | 2025 |
| Crisp & Clean Cardiff Ltd | Administrative & support | 2025 |
| Crispin Commercial Limited | Construction | 2014 |
| Crispy Shirts Ltd | Other services | 2023 |
| Crispy Wings Ltd | Hospitality | 2026 |
| Cristian Global Limited | Transport & logistics | 2019 |
| Cristiana Nails Ltd | Transport & logistics | 2025 |
| Cristofaro Retail Ltd | Wholesale & retail | 2013 |
| Critchcraft Limited | Wholesale & retail | 1965 |
| Criterion Civils and Structures Ltd | Construction | 2014 |
| Criterion Investments Ltd | Administrative & support | 2016 |
| Critical Cloud Limited | Information & communication | 2024 |
| Critical Stages Ltd | Arts & recreation | 2023 |
| Criticalnet Limited | Information & communication | 2015 |
| Criw Perfformio CYF | Arts & recreation | 2023 |
| CRJ Homes Ltd | Real estate | 2024 |
| CRK Consultancy Services Ltd | Information & communication | 2025 |
| CRL Creative Ltd | Construction | 2017 |
| Crockherbtown Estates Limited | Real estate | 2004 |
| Crocodile Health Limited | Health & social care | 2024 |
| Crocotive Limited | Information & communication | 2025 |
| Crocs Mart Ltd | Wholesale & retail | 2025 |
| Croeso Caerdydd CYF | Hospitality | 2025 |
| Croeso Cardiff Ltd | Hospitality | 2025 |
| Croeso Coffee Ltd | Hospitality | 2026 |
| Croeso Home Limited | Real estate | 2025 |
| Croeso Pubs Ltd | Arts & recreation | 2016 |
| Croeso Staff Limited | Arts & recreation | 2016 |
| Croffee Street Ltd | Hospitality | 2026 |
| Croflo&Motors Ltd | Wholesale & retail | 2025 |
| Croft Estate (Manorbier) Limited | Real estate | 1989 |
| Croft Street Warehouse Limited | Wholesale & retail | 2006 |
| Croftcloud Limited | Health & social care | 2012 |
| Crofton and Hall Limited | Wholesale & retail | 2017 |
| Croftshare Limited | Real estate | 2004 |
| Croke (South Bucks) Limited | Real estate | 2006 |
| Cromatix Group PC | | 2018 |
| Crombie Taggart Limited | Manufacturing | 2019 |
| Crome Ford Ltd | Wholesale & retail | 2025 |
| Cromhouse Management Ltd | Professional & scientific | 2010 |
| Cromwell Clean Ltd | Administrative & support | 2013 |
| Cronan Property Limited | Construction | 2026 |
| Crongan Ltd | Wholesale & retail | 2026 |
| Cronos Construction Ltd | Construction | 2019 |
| Cronos Consultancy Services Limited | Professional & scientific | 2014 |
| Cronva CYF. | Real estate | 2018 |
| Cros Platinum Luxury Cars Limited | Administrative & support | 2023 |
| Croscom Ltd | Information & communication | 2007 |
| Crosland Holdings Limited | Real estate | 2016 |
| Cross Accounting and Payroll Service Limited | Professional & scientific | 2011 |
| Cross Border Domains Ltd | Information & communication | 2021 |
| Cross Brickwork and Construction Ltd | Construction | 2022 |
| Cross Group Building Works Ltd | Construction | 2018 |
| Cross Hands Dental Care Limited | Health & social care | 2015 |
| Cross Housing Limited | Hospitality | 2017 |
| Cross Keys Consultants Limited | Professional & scientific | 1987 |
| Cross Subsea Services Limited | Professional & scientific | 2015 |
| Cross-Flow Energy Company Limited | Manufacturing | 2007 |
| Crossbow Shareholder Ltd | Administrative & support | 2022 |
| Crossbridge Advisory Ltd | Professional & scientific | 2025 |
| Crossfit Ancoats Limited | Arts & recreation | 2019 |
| Crossford Limited | Wholesale & retail | 2019 |