| 106 Ymddeol Limited | Financial services | 2021 |
| 3 D Motorsport Limited | Manufacturing | 2005 |
| 3D Accountancy Ltd | Professional & scientific | 2014 |
| 48HASHM Traditional Barber Ltd | Other services | 2025 |
| 5 Star Consultancy BW Ltd | Professional & scientific | 2023 |
| A & M Metals Holdings Limited | Financial services | 2024 |
| A & M Metals Limited | Water & waste | 2004 |
| A & R Facilities Limited | Construction | 2012 |
| A L Williams Electrical Ltd | Construction | 2017 |
| Aber Wills Ltd | Other services | 2021 |
| Academic Digital Limited | Information & communication | 2014 |
| Adams Future Ltd | Wholesale & retail | 2025 |
| AE Autolabs Limited | Professional & scientific | 2025 |
| Afterfall Studios Ltd | Information & communication | 2026 |
| AFW Construction Ltd | Construction | 2021 |
| AJG Energy Solutions Ltd | Professional & scientific | 2024 |
| AKS Financial Consultancy Limited | Financial services | 2012 |
| Al.Cool Products Ltd | Wholesale & retail | 2013 |
| Alaw CYF. | Professional & scientific | 2021 |
| Aloe Retreat Ltd | Other services | 2025 |
| Alun Smith Surveying Services Ltd | Professional & scientific | 2017 |
| Amazehotels Ltd | Professional & scientific | 2019 |
| Annedd WEN Ltd | Information & communication | 2025 |
| AOB Associates Limited | Water & waste | 2014 |
| APM Professional Services Limited | Administrative & support | 2018 |
| Artemis Therapies Ltd | Other services | 2024 |
| Ashley Business Consultants Limited | Professional & scientific | 2016 |
| Atlas World Food Ruthin Ltd | Hospitality | 2026 |
| Aurum CJ Ltd | Wholesale & retail | 2025 |
| Autoventive Ltd | Information & communication | 2017 |
| Awel Homecare Ltd | Health & social care | 2021 |
| Aydins 53 Ltd | Hospitality | 2025 |
| Baker Excellence in Construction Ltd | Construction | 2025 |
| Baker Roberts - Church Street Limited | Hospitality | 2024 |
| Baker Roberts Ltd | Professional & scientific | 2013 |
| Barker-Mayne Ltd | Manufacturing | 2023 |
| Beatroute Music Ltd | Education | 2003 |
| Beki Eakins Ltd | Professional & scientific | 2024 |
| Bellol Ltd | Real estate | 2015 |
| Bespoke Home Innovations Limited | Construction | 2023 |
| Bespoke One Creative Ltd | Arts & recreation | 2025 |
| Big House by the Sea Ltd | Hospitality | 2017 |
| Birch House Business Centre Limited | Real estate | 2008 |
| Birch House Business Park Ltd | Real estate | 2021 |
| Birchall Reality Ltd | Information & communication | 2020 |
| Black Gates Group Ltd | Hospitality | 2026 |
| Book of YOU C.I.C. | Other services | 2011 |
| Border Groundworks and Construction Ltd | Construction | 2025 |
| Borthwen Property Investments Limited | Real estate | 2021 |
| Boyns Information Systems Limited | Information & communication | 2003 |
| BPS Trading Limited | Real estate | 1995 |
| Brewer Enterprises Limited | Professional & scientific | 2011 |
| Brightside Education Ltd | Education | 2025 |
| Broster Horbury Ltd | Hospitality | 2019 |
| Bryn Cegin Limited | Real estate | 2025 |
| Buildboss Ltd | Information & communication | 2024 |
| Bulgarian Homes Limited | Real estate | 2021 |
| Bush Assessment and Analysis Ltd | Health & social care | 2024 |
| BVJ Property Ltd | Households | 2024 |
| C & L Investments (NW) Ltd | Extraterritorial | 2024 |
| C FF G & G CYF | Real estate | 2012 |
| C.H. Whittingham Services Limited | Professional & scientific | 2023 |
| Calveley Services Ltd | Professional & scientific | 2017 |
| Cambrian Fusion Technology Ltd | Professional & scientific | 2010 |
| Cambrian Services Limited | Mining & quarrying | 2018 |
| Capture IT Photobooth Ltd | Professional & scientific | 2023 |
| Cardamom Holidays Limited | Administrative & support | 2002 |
| Carroll Limited | Construction | 1997 |
| Carter's (NW) CIC | Health & social care | 2024 |
| Castle Mews Ruthin Ltd | Real estate | 2024 |
| Castle Plumbing and Bathrooms Ltd | Construction | 2024 |
| Ceafinancials Ltd | Financial services | 2022 |
| Celtic Dispute Resolution Ltd | Professional & scientific | 2018 |
| Celtic Strength Commercial Ltd | Real estate | 2021 |
| Celtic Strength Ltd | Arts & recreation | 2021 |
| CFR Strategy Ltd | Professional & scientific | 2022 |
| Charlotte Owen Cosmetics Ltd | Other services | 2021 |
| Chilly COW Ice Cream Ltd | Manufacturing | 2013 |
| Choo Choo ETC ETC Ltd | Wholesale & retail | 2010 |
| Christopher J Jones Wealth Management Ltd. | Financial services | 2017 |
| Chwarel Bryncir Quarry Prosesu Dwyfach Processing CYF | Mining & quarrying | 2008 |
| Cjss Property Ltd | Real estate | 2023 |
| Clive Hurt Anglesey Limited | Mining & quarrying | 2009 |
| Clough & Co Ltd | Other services | 2025 |
| Clwb Rygbi Rhuthun CYF | Arts & recreation | 2015 |
| Clwyd Innovations Limited | Professional & scientific | 2025 |
| Clwyd Taverns Limited | Hospitality | 2024 |
| Clwyd Wood Products Ltd | Extraterritorial | 2015 |
| Clwydian Holidays Limited | Hospitality | 2019 |
| Clwydian Properties Limited | Real estate | 2005 |
| Clwydian Range Tourism Group CIC | Administrative & support | 2012 |
| Coach & Classic Limited | Wholesale & retail | 2015 |
| Constructeco UK Ltd | Wholesale & retail | 2014 |
| Container Yards Storage Ltd | Real estate | 2017 |
| Creu Limited | Professional & scientific | 2007 |
| Custom Canopy Limited | Financial services | 2021 |
| Cuthill Williams Limited | Construction | 2019 |
| Cutting Hedge Landscapes Commercial Limited | Administrative & support | 2026 |
| Cutting Hedge Landscapes Limited | Administrative & support | 2010 |
| Cwmni Ynni CYF | Extraterritorial | 2019 |