| Crewe Storage Limited | Administrative & support | 2025 |
| Croes Foel Estates Limited | Households | 2012 |
| Cromarty Edge Limited | Administrative & support | 2007 |
| Crossley Contract Services Ltd | Professional & scientific | 2000 |
| Crown Central Malpas Limited | Hospitality | 2024 |
| Crown SNR Limited | Hospitality | 2024 |
| Crownstone Deepak Limited | Wholesale & retail | 2025 |
| CRS (22) Ltd | Real estate | 2022 |
| CRS Holdco Limited | Financial services | 2022 |
| CRS Rents Ltd | Real estate | 2022 |
| Crugmor Ltd | Real estate | 2012 |
| Cryo Link Ltd | | 2011 |
| Cryospec Inspection Services Ltd | Construction | 2013 |
| Crystle Magic Limited | Information & communication | 2025 |
| Crystle Management Ltd | Real estate | 2026 |
| CS Advertisement Ltd | Professional & scientific | 2024 |
| CS Detail Limited | Administrative & support | 2022 |
| CS Ecology Ltd | Professional & scientific | 2026 |
| CS Glass & Aluminium Specialists Ltd | Manufacturing | 2017 |
| CS Utilities NW Ltd | Construction | 2025 |
| Cshc Limited | Extraterritorial | 2014 |
| Cslr Limited | Hospitality | 2016 |
| CT Gastro Services Limited | Health & social care | 2016 |
| CT Homes Limited | Professional & scientific | 2004 |
| Ctif Limited | Wholesale & retail | 2013 |
| Culcheth Medical Limited | Health & social care | 2022 |
| Cullen Brooke Associates Limited | Administrative & support | 2021 |
| Cultivar Greenhouses Limited | Manufacturing | 2019 |
| Cultivar Limited | Manufacturing | 2009 |
| Culver Consultancy Limited | Administrative & support | 1997 |
| Cunnah Aviation Services Ltd | Manufacturing | 2025 |
| Curegp Limited | Health & social care | 2025 |
| Curradine Holdings Limited | Real estate | 2012 |
| Current Connect NW LLP | | 2025 |
| Curry on the Go Wrexham Ltd | Wholesale & retail | 2018 |
| Custom Craft Shapes Ltd | Wholesale & retail | 2015 |
| Customer Acquisition Services Ltd | Wholesale & retail | 2025 |
| Cutcam Ltd | Information & communication | 2009 |
| Cutting Edge Landscapes (WM) Limited | Administrative & support | 2008 |
| CVM Enterprises Limited | Health & social care | 2023 |
| CVS Retail Ltd | Wholesale & retail | 2023 |
| CW Building & Plastering Ltd | Construction | 2018 |
| Cweng Building Services Ltd | Construction | 2017 |
| CWT Holdings Limited | Administrative & support | 2020 |
| Cyberwarden Ltd. | Information & communication | 2025 |
| Cycling 4 ALL | Arts & recreation | 2015 |
| CYG Partners Limited | Wholesale & retail | 2024 |
| Cymro Property Ltd | Real estate | 2025 |
| Cynefin Associates Limited | Administrative & support | 2025 |
| Cyril Jones Ltd | Construction | 2007 |
| Cytec Engineered Materials Limited | Manufacturing | 1993 |
| Cytec UK Holdings Limited | Professional & scientific | 1993 |
| D & K Home Improvements Limited | Construction | 2006 |
| D & L Interim Solutions Ltd | Information & communication | 2022 |
| D a Hopkins Ltd | Professional & scientific | 2025 |
| D a Hull Consulting Ltd | Information & communication | 2018 |
| D a Jones International Ltd | Transport & logistics | 2025 |
| D Akrigg Limited | Professional & scientific | 2015 |
| D and D NW Brickwork Limited | Construction | 2017 |
| D and S Hair Limited | Other services | 2019 |
| D B Thermal Insulation Limited | Construction | 1994 |
| D C Burton Limited | Construction | 2007 |
| D Domagala Ltd | Transport & logistics | 2017 |
| D Ferrari Roofing Limited | Construction | 2008 |
| D H Paving & Groundworks Ltd | Construction | 2004 |
| D H Sanger Ltd | Construction | 2019 |
| D Hughes Automotive Ltd | Wholesale & retail | 2019 |
| D J Electrical Consultants Ltd | Manufacturing | 2005 |
| D J Roberts Limited | Extraterritorial | 2013 |
| D Jones Accounting Services Ltd | Professional & scientific | 2017 |
| D M Owens Limited | Construction | 2003 |
| D Nixon Plumbing Services Limited | Construction | 2014 |
| D S J Electrics Limited | Construction | 2015 |
| D S L Mobility Ltd | Manufacturing | 1999 |
| D T Building Contractors Limited | Construction | 2017 |
| D Wynne Haulage Limited | Transport & logistics | 2012 |
| D&G Automotive Ltd | Wholesale & retail | 2018 |
| D&J Property Group Ltd | Real estate | 2024 |
| D&P Air Conditioning Ltd | Construction | 2023 |
| D&P Project Management Ltd | Construction | 2025 |
| D. S. Holmes Builders Limited | Construction | 1976 |
| D. Simons Building & Joinery Ltd | Construction | 2012 |
| D.L.R. Engineering Services Limited | Construction | 2007 |
| D.Millington Plumbing and Heating Ltd | Construction | 2019 |
| D.Pritchard Property Ltd | Real estate | 2026 |
| D.S. Holmes Properties Limited | Construction | 1975 |
| D.T.(Automotives)Limited | Wholesale & retail | 1972 |
| Dace Consultancy Limited | Professional & scientific | 2015 |
| Dacrf Ltd | Health & social care | 2026 |
| Daikatana Limited | Manufacturing | 2017 |
| Dairy Lane Ltd | Agriculture & fishing | 2022 |
| Daisy Manor Limited | Hospitality | 2015 |
| Dale Farm (GB) Limited | Wholesale & retail | 2003 |
| Dale Roberts Construction Ltd | Construction | 2006 |
| Damwiki Scaffolding Ltd | Construction | 2018 |
| DAN Baker Technical Services, Surveying and Engineering Limited | Construction | 2007 |
| DAN Evans Groundworks Limited | Construction | 2014 |
| Danar Property and Land Management Limited | Administrative & support | 2009 |
| Daniel Taylor Productions Limited | Arts & recreation | 2014 |
| Danjar Auto Ltd | Wholesale & retail | 2021 |