| Care Forum Wales | Other services | 1999 |
| Care Forum Wales Care Awards Limited | Administrative & support | 2006 |
| Carecircuit Ltd | Health & social care | 2026 |
| Caregenius Ltd | Information & communication | 2020 |
| Carekind Limited | Health & social care | 2013 |
| Cargoclips Limited | Professional & scientific | 2021 |
| Cariad Care North Wales Ltd | Health & social care | 2023 |
| Cariblue Limited | Health & social care | 2022 |
| Caring Companions (UK) Limited | Administrative & support | 2005 |
| Carl Holden Legal Limited | Administrative & support | 2019 |
| Carl Morris Building Services Ltd | Construction | 2024 |
| Carlematt Ltd | Construction | 2007 |
| Carlos the Builder Limited | Administrative & support | 2024 |
| Carmora Ltd | Wholesale & retail | 2025 |
| Carolyn Hinds Clin Psych Limited | Health & social care | 2020 |
| Carpite Limited | Professional & scientific | 2021 |
| Carrick Technical Solutions Limited | Professional & scientific | 2007 |
| Carter & Haines (Rossett) Limited | Wholesale & retail | 2020 |
| Carter & Haines Ltd | Wholesale & retail | 2018 |
| Cartion Ltd | Wholesale & retail | 2005 |
| Cartre Ltd | Health & social care | 2024 |
| Cartrefi G.O. (Rhiwabon) CYF. | Construction | 2018 |
| Caru Wedding Videography Ltd | Information & communication | 2016 |
| Casitex Ltd | Transport & logistics | 2021 |
| Castec Engineering Ltd | Manufacturing | 2025 |
| Castle Mews Windows Ltd | Construction | 2019 |
| Castle View Car Sales Ltd | Wholesale & retail | 2025 |
| Castle View Holidays Ltd | Hospitality | 2024 |
| Castlemead Developments Limited | Construction | 1990 |
| Castlemead Group Limited | Construction | 1994 |
| Castlemead Limited | Construction | 1984 |
| Castor Engineering Design & Management Ltd | Construction | 2007 |
| Casual Essentials Ltd | Wholesale & retail | 2018 |
| Catalyst Interiors Ltd | Professional & scientific | 1999 |
| Catch the Fire Ministries (UK) | Other services | 2006 |
| Cate Property Ltd | Real estate | 2025 |
| Cathian Regina Limited | Wholesale & retail | 2024 |
| Cave Dog Ltd | Wholesale & retail | 2018 |
| Cavendish Property Services Limited | Real estate | 2017 |
| CB & MD Properties Limited | Real estate | 2025 |
| CB Empire Roofing Ltd | Construction | 2022 |
| CBS Driveways and Landscaping Ltd | Construction | 2018 |
| CC Wellness Limited | Other services | 2019 |
| CCP Aggregates Limited | Mining & quarrying | 1955 |
| CCP Building Products Limited | Manufacturing | 2005 |
| Ccsp Ltd | Health & social care | 2025 |
| CDC Accounting Limited | Professional & scientific | 2004 |
| CDL Services Limited | Professional & scientific | 2026 |
| CDS IT Solutions Limited | Agriculture & fishing | 2010 |
| CE Technical Solutions Limited | Manufacturing | 2018 |
| Cecil S. Allen & Sons Limited | Extraterritorial | 1997 |
| Cedar Joinery & Building Ltd | Construction | 2010 |
| Cefn Mawr Driveways Ltd | Construction | 2021 |
| Cefn Park Developments Limited | Construction | 1972 |
| Cefn Park Management Ltd | Real estate | 2022 |
| Ceiriog Computers Limited | Wholesale & retail | 2025 |
| Celixer Ltd | Wholesale & retail | 2023 |
| Cellan Wrexham Limited | Wholesale & retail | 2008 |
| Celmer Ltd | Transport & logistics | 2024 |
| Celt Installations Ltd | Other services | 2016 |
| Celtic Industrial Estates (Wrexham) Limited | Real estate | 1967 |
| Celtic Travel Limited | Transport & logistics | 2022 |
| Central Cars Llay Limited | Transport & logistics | 2013 |
| Central Wrexham Ltd | Hospitality | 2020 |
| Centre for Justice and Liberty Limited | Professional & scientific | 2001 |
| Centre for Work Based Learning Limited | Education | 2019 |
| Centre-Mid Limited | Arts & recreation | 2006 |
| Centurian Design Limited | Construction | 2017 |
| CER Fitness Limited | Arts & recreation | 2023 |
| Ceridwen Theatre Company Ltd | Arts & recreation | 2014 |
| Cerise Properties Ltd | Real estate | 2024 |
| Cerney Properties Ltd | Real estate | 2025 |
| Cerrysd Rentals Ltd | Administrative & support | 2026 |
| Ceylon WOK Limited | Hospitality | 2026 |
| CGS Auto Worx Ltd | Wholesale & retail | 2026 |
| CH Power Ltd | Energy | 2025 |
| CH Solutions Chester Limited | Wholesale & retail | 2019 |
| Chaha Limited | Real estate | 2020 |
| Chalk 2 the Hand Ltd. | Wholesale & retail | 2020 |
| Chalk Tables Ltd | Professional & scientific | 2023 |
| Chameleon IT Limited | Information & communication | 2007 |
| Champion Sports Elite UK Limited | Education | 2021 |
| Chandran Limited | Health & social care | 2013 |
| Charisma Trophies Ltd | Wholesale & retail | 2015 |
| Charles Marie Ltd | Hospitality | 2024 |
| Charlies Car Wash Limited | Administrative & support | 2012 |
| Chaudhary Umair Ecom Ltd | Wholesale & retail | 2025 |
| Chauffeur North Wales Ltd | Transport & logistics | 2024 |
| Chawkes Civil Engineering Ltd | Construction | 2007 |
| Cheap Tyres Wrexham Limited | Extraterritorial | 2013 |
| Checksfield Engineering Services Limited | Construction | 2007 |
| Cherrysource Limited | Manufacturing | 2004 |
| Cherubic Alchemist Limited | Wholesale & retail | 2024 |
| Cheshire 1963 Limited | Extraterritorial | 2014 |
| Cheshire Concrete Products Limited | Manufacturing | 2016 |
| Cheshire Luxury Watches Ltd | Wholesale & retail | 2022 |
| Cheshire Vehicle Hire Limited | Wholesale & retail | 2017 |
| Chester Finance & Leasing (Assets) Limited | Wholesale & retail | 2021 |
| Chester & North Wales Multilingual Tours Ltd | Administrative & support | 2026 |
| Chester Body Mechanic Limited | Health & social care | 2016 |