| Cartrefi Clwyd Ltd | Real estate | 2024 |
| Casa Redditus Ltd | Real estate | 2023 |
| Castle Hotel (Windermere) Limited | Hospitality | 2009 |
| Celo Food Limited | Hospitality | 2025 |
| Celtick Comms Ltd | Professional & scientific | 2025 |
| Central Dental Care Ltd | Health & social care | 2022 |
| CH1 Barbers Ltd | Other services | 2019 |
| Charged Agency Limited | Professional & scientific | 2026 |
| Chawa Barber Ltd | Other services | 2025 |
| Chelsea & Hall Solutions Ltd | Professional & scientific | 2022 |
| Cheshire Tarmacadum & Driveways Ltd | Construction | 2011 |
| Cimelli Heating Ltd | Construction | 2013 |
| CJM Smith Limited | Manufacturing | 2013 |
| Clayton Associates Group Ltd | Administrative & support | 2024 |
| CLB Online Ltd | Arts & recreation | 2025 |
| Clement Hughes & Co LLP | | 2023 |
| Clewistion Cars Limited | Wholesale & retail | 2021 |
| CLJ Home Renovations Ltd | Manufacturing | 2023 |
| Clwb Penmorfa Community Interest Company | Education | 2020 |
| Clwyd Canines Limited | Other services | 2025 |
| Clwyd Eats Ltd | Hospitality | 2021 |
| Co-Options Ltd. | Health & social care | 1989 |
| Coach to Group Ltd | Transport & logistics | 2026 |
| Coastal Construction (North Wales) Ltd | Construction | 2019 |
| Coastal Drainage Solutions Ltd | Water & waste | 2010 |
| Coastal Properties and Lettings Ltd | Real estate | 2026 |
| Coltmans Kitchen Ltd | Hospitality | 2023 |
| Commodore Finance Limited | Financial services | 2006 |
| COMPANIES4EWE Limited | Administrative & support | 2024 |
| Conform Direct Ltd | Construction | 2025 |
| Contento Media Ltd | Information & communication | 2025 |
| COQ D'Or (Backford Cross) Limited(The) | | 1963 |
| Costless Windows & Doors Limited | Construction | 2018 |
| CP Motors Ltd | Wholesale & retail | 2018 |
| CRC Equine Ltd | Agriculture & fishing | 2026 |
| Crimson SAP Consult Ltd | Information & communication | 2019 |
| Cronk Commercials Limited | Manufacturing | 2026 |
| Cruze Hairdressing Limited | Other services | 2003 |
| CS Public Houses Ltd | Hospitality | 2025 |
| Custom ID Ltd | Wholesale & retail | 2020 |
| CW Applied Arts Events Limited | Manufacturing | 2023 |
| Cyprotec Ltd | Information & communication | 2018 |
| D & G Millard Ltd | Hospitality | 2026 |
| D Bailey Tiling Ltd | Construction | 2020 |
| D J Barber Ltd | Construction | 2024 |
| Daisy Chains Prestatyn Limited | Health & social care | 2012 |
| Danielle Jade Aesthetics and Skin Ltd | Education | 2021 |
| Daniels Construction Ltd | Construction | 2025 |
| David Holmes (N.W) Ltd | Construction | 2019 |
| David Joseph Chimney Care Ltd | Administrative & support | 2023 |
| David Walker Training Ltd | Professional & scientific | 2016 |
| David. J. Jones Furniture Craftsmen Ltd. | Manufacturing | 2001 |
| DD Lining Services Ltd | Construction | 2022 |
| Deeside Management Services Ltd | Real estate | 2010 |
| Delight Roofing Ltd | Construction | 2025 |
| Delmark Enterprises Ltd | Other services | 2019 |
| Denbighshire Direct Cremations Ltd | Other services | 2025 |
| Denbighshire Taekwondo Academy Ltd | Education | 2023 |
| Dewi Roberts & SON Ltd | Administrative & support | 2024 |
| Dfnd Ltd | Wholesale & retail | 2026 |
| Dinbych Properties Limited | Real estate | 1997 |
| Dirtbusters Skip Hire Ltd | Water & waste | 2023 |
| Divine Retreats (NW) Ltd | Other services | 2024 |
| Dragon Caravans Limited | Hospitality | 2020 |
| Drinkeleven Ltd | Wholesale & retail | 2026 |
| Dyslexia Duets Ltd | Education | 2024 |
| E.T.A. Mechanical Services Ltd | Construction | 2023 |
| EBA Property Rentals Ltd | Real estate | 2023 |
| Eco Home Installations NW Ltd | Construction | 2023 |
| EDE Official Ltd | Wholesale & retail | 2021 |
| Edwardian Joinery Ltd | Construction | 2020 |
| Egypt Overseas Investment Group Limited | Wholesale & retail | 2020 |
| Egyptian Delight Ltd | Hospitality | 2026 |
| Elwy Vintage Limited | Wholesale & retail | 2017 |
| Empr (UK) Ltd | Arts & recreation | 2015 |
| Emre Consultancy Limited | Professional & scientific | 2012 |
| Enchanted Wishing Tree Limited | Wholesale & retail | 2018 |
| Envirohawk Ltd | Administrative & support | 2023 |
| Erelis Solutions Limited | Administrative & support | 2012 |
| ET Cetera Distribution Limited | Wholesale & retail | 2005 |
| Evansongs Limited | Extraterritorial | 2002 |
| Everything Fresh Catering Ltd | Hospitality | 2021 |
| Ewing Automation Limited | Manufacturing | 2025 |
| EWX Bars Ltd | Hospitality | 2023 |
| Explore North Wales Ltd | Real estate | 2022 |
| F E Jones and Sons Limited | Wholesale & retail | 2012 |
| Fairway Haulage Ltd | Transport & logistics | 2024 |
| Falconhurst Technologies Limited | Information & communication | 2023 |
| Farnsworth Court LLP | | 2013 |
| Feed ME Sista Ltd | Professional & scientific | 2021 |
| Ffrith Trading Ltd | Wholesale & retail | 2025 |
| Fight Back Cyber Ltd | Information & communication | 2023 |
| FIN Cabs Ltd | Transport & logistics | 2025 |
| First Trade Windows Ltd | Manufacturing | 2024 |
| Flame on GAS Services Ltd | Construction | 2021 |
| Fleettec Contracting Limited | Wholesale & retail | 2019 |
| Flint Mountain Beverage Limited | Hospitality | 2025 |
| Flint Mountain Functions Limited | Hospitality | 2025 |
| Flintshire Printing Ltd | Wholesale & retail | 2019 |
| Flintshire Property Services Ltd | Construction | 2017 |