| Comtek Group Ltd | Information & communication | 2018 |
| Comtek Network Systems (UK) Limited | Information & communication | 2006 |
| Connahs Quay Dental Practice Ltd | Health & social care | 2009 |
| Controlright Property Management Limited | Households | 1999 |
| Convatec Accessories Limited | Manufacturing | 2009 |
| Convatec Limited | Manufacturing | 1977 |
| Convatec Management Holdings Limited | Other services | 2016 |
| Convatec NAP Limited | Health & social care | 2023 |
| Convatec Speciality Fibres Limited | Manufacturing | 1999 |
| Cooper Civil Engineering & Design Ltd | Professional & scientific | 2018 |
| Corbett Bookmakers Limited | Arts & recreation | 1971 |
| Corbett Holdings Limited | Professional & scientific | 1993 |
| Corbett-Line Limited | Extraterritorial | 2000 |
| Corbuild Ltd | Construction | 2016 |
| Core Resource & Consulting Limited | Professional & scientific | 2017 |
| Corporate Food Company Limited | Hospitality | 2007 |
| Costelloe and Kelly Ltd | Real estate | 2014 |
| County Investment Holdings Limited | Real estate | 2020 |
| County Town Estates Limited | Real estate | 2020 |
| Courtyard Management Company (Hawarden) Limited | Real estate | 2014 |
| Cracked Coffee Limited | Hospitality | 2021 |
| Cream Properties (NW) Limited | Real estate | 2020 |
| Creative History Media Limited | Arts & recreation | 2025 |
| Cristi Logistic Services Limited | Transport & logistics | 2020 |
| Cristian Goga Ltd | Transport & logistics | 2023 |
| Croftmount Associates Ltd | Professional & scientific | 2002 |
| Cross Solicitors LLP | | 2016 |
| Crossley Roofing Limited | Construction | 2014 |
| Cryoniss Ltd. | Professional & scientific | 2018 |
| CT Ice Acquisitions Limited | Professional & scientific | 2005 |
| CT Ice Limited | Wholesale & retail | 2001 |
| CVO Project Management Limited | Financial services | 2012 |
| D & K Lindop Holdings Limited | Extraterritorial | 1980 |
| D a Utility Services Limited | Construction | 2005 |
| D Booth Consultancy Ltd | Information & communication | 2021 |
| D C M Glass & Glazing Ltd | Construction | 2002 |
| D&D Operator Ltd | Wholesale & retail | 2024 |
| D&T Solutions Ltd | Administrative & support | 2023 |
| Dale's Travel (North Wales) Ltd | Transport & logistics | 2019 |
| Dampshield UK Ltd | Construction | 2015 |
| Dance Fever Limited | Administrative & support | 2015 |
| Darband Ltd | Real estate | 2022 |
| Darflav Trans Ltd | Transport & logistics | 2024 |
| Data Housewares Limited | Wholesale & retail | 2001 |
| Data Safe Recycling Limited | Information & communication | 2026 |
| Dave Bonner Joinery Limited | Construction | 2006 |
| Dave Lupi Building and Renovations Ltd | Construction | 2021 |
| David Clement Properties Limited | Real estate | 2017 |
| David Liles Properties Limited | Real estate | 2017 |
| Dealsta Ltd | Wholesale & retail | 2025 |
| DEE Ciders Limited | Manufacturing | 2014 |
| DEE Coastal Catch Ltd | Agriculture & fishing | 2023 |
| DEE Deliveries Ltd | Transport & logistics | 2014 |
| DEE Landscapes Limited | Administrative & support | 1999 |
| Deecare Limited | Health & social care | 2003 |
| Deefab Limited | Wholesale & retail | 1996 |
| Deepack Limited | Manufacturing | 1994 |
| Deeside 4 X 4 Limited | Wholesale & retail | 1998 |
| Deeside 4 X 4 Workshop Limited | Wholesale & retail | 2023 |
| Deeside Autorefinishing Limited | Manufacturing | 2017 |
| Deeside Business Forum Limited | Professional & scientific | 2016 |
| Deeside Creameries Ltd. | Manufacturing | 2004 |
| Deeside Darts Limited | Wholesale & retail | 2025 |
| Deeside Engineering Ltd | Manufacturing | 2008 |
| Deeside Fight Club Ltd | Arts & recreation | 2018 |
| Deeside Garden Limited | Hospitality | 2024 |
| Deeside Home Care Ltd | Health & social care | 2019 |
| Deeside Insurance Brokers Limited | Financial services | 1959 |
| Deeside Interiors Ltd | Construction | 2026 |
| Deeside Motorcycle Centre Ltd | Wholesale & retail | 2019 |
| Deeside Outlet Limited | Wholesale & retail | 2017 |
| Deeside SIX Properties Limited | Real estate | 2021 |
| Deeside Storage Limited | Transport & logistics | 1981 |
| Deft Drainage Solutions Ltd | Water & waste | 2024 |
| Delphin Consulting Limited | Professional & scientific | 2025 |
| Delta Mechanical UK Ltd | Construction | 2020 |
| Delta Rock Services Ltd | Administrative & support | 2023 |
| DESIDE41 Ltd | Transport & logistics | 2025 |
| Design Trade Windows and Doors Ltd | Manufacturing | 2024 |
| Deva Exhibitions Limited | Administrative & support | 2025 |
| Deva Inns and Taverns Limited | Wholesale & retail | 1992 |
| Deva Scaffolding Limited | Construction | 2016 |
| Devtutor Ltd | Education | 2016 |
| DG Arboriculture Ltd | Agriculture & fishing | 2025 |
| DG Traders Ltd | Wholesale & retail | 2024 |
| Dh&M Engineering Ltd | Professional & scientific | 2023 |
| DIB IT Limited | Information & communication | 2008 |
| Dids Inc. Limited | Other services | 2024 |
| Digital Tuning Services Ltd | Professional & scientific | 2021 |
| Direct Interiors North West Limited | Construction | 2002 |
| Discount Concrete Garages Ltd | Manufacturing | 2019 |
| Div-Hub Ltd | Wholesale & retail | 2023 |
| Diversify Your Talent CIC | Administrative & support | 2020 |
| DK Deeside Real Estate Limited | Real estate | 2023 |
| Dojavictor Services Ltd | Health & social care | 2022 |
| Domestic Abuse Safety Unit North Wales Ltd | Hospitality | 2005 |
| Double Click Design and Print CIC | Manufacturing | 2015 |
| Dragon Event Crew CYF | Administrative & support | 2022 |
| Dragonfly Care Limited | Health & social care | 2023 |
| Dream Space Staging Limited | Information & communication | 2024 |