| Chester Brickwork Ltd | Construction | 2024 |
| Chester Centurions Rugby Union Football Club Ltd | Arts & recreation | 2022 |
| Chester Finance & Leasing (Environmental) Limited | Water & waste | 2018 |
| Chester Finance & Leasing (Group) Limited | Administrative & support | 2018 |
| Chester Finance & Leasing (Licencing) Limited | Real estate | 2018 |
| Chester Finance & Leasing Limited | Wholesale & retail | 2002 |
| Chester Roast Ritual Limited | Hospitality | 2025 |
| Chester SA Limited | Hospitality | 2017 |
| Chester Sparks Electrical Services Ltd | Manufacturing | 2025 |
| Chestnut House Healthcare Limited | Health & social care | 2011 |
| Chestnut House Holdings Limited | Health & social care | 2017 |
| Chestnut House Nursing Home Limited | Health & social care | 1997 |
| Chestnut Roofing Solutions Limited | Construction | 2024 |
| Chesworth Plastering Ltd | Construction | 2023 |
| Chetwood Financial Limited | Financial services | 2016 |
| Chetwood Lloyd Ltd | Financial services | 2004 |
| Chetwood Lloyd Mortgages Ltd | Financial services | 2020 |
| CHF Investments Ltd | Real estate | 2019 |
| Chigili's Ltd | Real estate | 2024 |
| Chip Happens Ltd | Hospitality | 2025 |
| Chip-O-Dee Limited | Hospitality | 2025 |
| Chirk Airfield CIC | Transport & logistics | 2026 |
| Chirk Autopaints Limited | Wholesale & retail | 2002 |
| Chirk Mill Paranormal Ltd | Arts & recreation | 2024 |
| CHL Mortgages for Intermediaries Limited | Financial services | 2020 |
| Cholmondeley Castle Farm Shop Ltd | Wholesale & retail | 2023 |
| Cholmondeley Tearooms Ltd | Hospitality | 2024 |
| Chompee Ltd | Manufacturing | 2025 |
| Choudhery Ltd | Wholesale & retail | 2019 |
| Chris Edwards Limited | Real estate | 1987 |
| Chris Evans Digital Health Consultant Ltd | Professional & scientific | 2024 |
| Chrism Construction Management Consultancy Limited | Construction | 2007 |
| Chuspeace Limited | Financial services | 2022 |
| Cibor Machinery Limited | Wholesale & retail | 2024 |
| Cibor Woodworking Machinery Ltd. | Manufacturing | 2020 |
| Cici Active Limited | Wholesale & retail | 2018 |
| Cici Clothing Limited | Wholesale & retail | 2026 |
| CIG Group Properties Ltd | Financial services | 2023 |
| Cillus Ltd | Other services | 2017 |
| Cillus Solutions Ltd | Professional & scientific | 2025 |
| Circus Newt Ltd | Information & communication | 2026 |
| Civils & Construction UK Ltd | Construction | 2014 |
| CJ Civils Ltd | Construction | 2020 |
| CJB Aero Limited | Information & communication | 2008 |
| CJE Joinery and Building Ltd | Construction | 2022 |
| CJR Network LLP | | 2025 |
| CJV Builds Ltd | Real estate | 2026 |
| Cj’S BBQ & Smokehouse Limited | Hospitality | 2024 |
| CK Engineering Services Ltd | Professional & scientific | 2025 |
| CL Products (Wrexham) Ltd | Professional & scientific | 2023 |
| Clare's Cleaning Services Ltd | Administrative & support | 2014 |
| Clarendons Kitchens Ltd | Manufacturing | 2021 |
| Clayton-Brown Financial Ltd | Financial services | 2025 |
| Clayton-Brown Solutions Ltd | Administrative & support | 2025 |
| Clde Limited | Professional & scientific | 2009 |
| Clean & Green Utilities Limited | Professional & scientific | 2021 |
| Clean and Green Utility Services Limited | Professional & scientific | 2025 |
| Cleaning Promotions Limited | Professional & scientific | 2020 |
| Cleanliness Services Limited | Administrative & support | 2026 |
| Clear Concise Accounting Limited | Professional & scientific | 2021 |
| Clear Sky Marketing Ltd | Professional & scientific | 2018 |
| Clear Steps Consulting Limited | Professional & scientific | 2025 |
| Clearer Hearing Solutions Ltd | Health & social care | 2025 |
| Click Convert Marketing Ltd | Information & communication | 2022 |
| Clickleadx Ltd | Professional & scientific | 2023 |
| Client Informatics Limited | Information & communication | 2017 |
| Clifford & Co. Limited | Wholesale & retail | 2023 |
| Climac Organization Limited | Extraterritorial | 2024 |
| Clinic Courses Ltd | Education | 2022 |
| CLO Electrical Limited | Manufacturing | 2017 |
| Close Properties 2014 LLP | | 2013 |
| Cloudcair (Holdings) Limited | Professional & scientific | 2016 |
| Cloudcair Limited | Manufacturing | 2018 |
| Cloudcom 365 Ltd | Administrative & support | 2021 |
| Clpl Limited | Wholesale & retail | 2022 |
| Clpw C.I.C. | Health & social care | 2016 |
| CLS Electrical Solutions Ltd | Construction | 2025 |
| CLS Properties NW Ltd | Real estate | 2025 |
| Clutton Construction Group Ltd | Construction | 2026 |
| Clwb Rygbi Rhos CYF | Arts & recreation | 2018 |
| Clwyd Caravan and Leisure Limited | Wholesale & retail | 1990 |
| Clwyd Compounders Limited | Manufacturing | 1978 |
| Clwyd Concrete Products Limited | Manufacturing | 2010 |
| Clwyd Construction & Maintenance Ltd | Construction | 2021 |
| Clwyd Consultants Limited | Professional & scientific | 2010 |
| Clwyd Contracting Ltd | Construction | 2025 |
| Clwyd Equestrian & Country Ltd | Wholesale & retail | 2012 |
| Clwyd Industrial Cladding Limited | Real estate | 1985 |
| Clwyd Ltd | Construction | 2021 |
| Clwyd Special Riding Centre Limited | Health & social care | 2006 |
| Clwyd Steel Limited | Wholesale & retail | 2011 |
| Clwydian Group Limited | Professional & scientific | 2010 |
| CM Building & Joinery Ltd | Construction | 2022 |
| CMR Engineering Limited | Professional & scientific | 2017 |
| CMS Wrexham Limited | Manufacturing | 2005 |
| Coabode Consultancy Limited | Information & communication | 2024 |
| Coabode Investments Ltd | Real estate | 2021 |
| Coach House Coffee Lodge Ltd | Wholesale & retail | 2025 |
| Coach House Rentals Ltd | Real estate | 2025 |
| Coachhouse Country K9 Ltd | Wholesale & retail | 2023 |