| 1-10 Llys Rhostrefor RTM Company Ltd | Administrative & support | 2015 |
| 11-18 Llys Rhostrefor RTM Company Ltd | Administrative & support | 2015 |
| 115 Station Road Management Limited | Extraterritorial | 2021 |
| 1CONWY Ltd | Professional & scientific | 2024 |
| 2020 Vision Pro Ltd | Health & social care | 2020 |
| 22 Caroline Road Management Company Limited | Households | 2006 |
| 2805 Developments and Plant Hire Limited | Construction | 2025 |
| 2805 Developments Limited | Construction | 2025 |
| 3 Gates Management Company Limited | Households | 2012 |
| 4 Mental Health Ltd | Other services | 2017 |
| 51 Madoc Street Llandudno Limited | Households | 2007 |
| A & I Holdings Limited | Real estate | 2020 |
| A55 Plumbing and Heating Ltd | Other services | 2019 |
| Abbeyfield Colwyn Bay Society Limited(The) | Hospitality | 1961 |
| Abeko Dredging & Marine Contractors Ltd | Construction | 2010 |
| Abeko Marine Ltd | Construction | 2020 |
| Aberconwy Alltrades Ltd | Construction | 2024 |
| Aberconwy Septic Tanks Limited | Extraterritorial | 2001 |
| Abergele Golf Club Limited | Arts & recreation | 1967 |
| Absolute Venues Limited | Administrative & support | 2002 |
| Absolute Venues Worldwide Limited | Administrative & support | 2009 |
| Active Health and Performance Consultancy Ltd | Wholesale & retail | 2022 |
| Adaptiv Solutions Ltd | Professional & scientific | 2023 |
| Admiral House West Shore (Llandudno) Freehold Company Limited | Households | 2021 |
| Adventurous EWE Limited | Arts & recreation | 2011 |
| Afrm Limited | Information & communication | 2012 |
| Albion ALE House CYF | Hospitality | 2011 |
| Alcock Jones Financial Planning Limited | Financial services | 1996 |
| Alder Electrical Insulation (Tyldesley) Limited | Wholesale & retail | 1984 |
| Alexander Grace Bathroom Designs Ltd | Construction | 2021 |
| Alice Kate Architects Ltd | Professional & scientific | 2018 |
| Allcare Nursing Agency Ltd | Health & social care | 2005 |
| Alnwick Springs Ltd | Hospitality | 2023 |
| Alwyn Jones Property Developments Ltd | Construction | 2019 |
| Amanda Jackson Psychological Therapist Ltd | Health & social care | 2022 |
| Ameera Accountancy Limited | Professional & scientific | 2025 |
| Ameera Developments Limited | Construction | 2023 |
| Ammatti.Uk Ltd | Education | 2021 |
| Amphletts Solicitors Limited | Professional & scientific | 2010 |
| Ancient Arts Limited | Arts & recreation | 2007 |
| APL Rentals LLP | | 2022 |
| Applied Petroleum Technology (UK) Ltd. | Professional & scientific | 2006 |
| Archaeotect Limited | Arts & recreation | 2007 |
| Aria Instruments Ltd | Professional & scientific | 2015 |
| Arterium Hub CIC | Education | 2023 |
| Ashe Retrofit Ltd | Other services | 2022 |
| Ashley Forbes-Herbert Limited | Extraterritorial | 2024 |
| Aslets the Letting Agents Ltd | Real estate | 2008 |
| Association of Mountaineering Instructors | Other services | 2012 |
| Astro NAV UK Ltd | Education | 2023 |
| Atlas Healthcare Solutions Limited | Health & social care | 2024 |
| Autotop Limited | Wholesale & retail | 2002 |
| Auxilium TM Ltd | Transport & logistics | 2022 |
| Baravelli's Ltd | Manufacturing | 2011 |
| Barnwell Parker Geoscience Limited | Professional & scientific | 2006 |
| Barr Surveys Limited | Construction | 2015 |
| Bay View (Deganwy) Management Company Limited | Real estate | 2015 |
| Beach House (Rhos on Sea) Management Company Limited | Households | 2020 |
| Beaumont Court (Rhos-On-Sea) Limited | Real estate | 1983 |
| Beauty Bar NW Ltd | Other services | 2021 |
| Beehive Coaching and Leadership Development Ltd. | Professional & scientific | 2005 |
| BEN Walker Photography Ltd | Professional & scientific | 2015 |
| Beta Technical Services Limited | Information & communication | 2003 |
| Betwsycoed Golf Club Limited | Arts & recreation | 1976 |
| Birchwood Hire Limited | Administrative & support | 2025 |
| Birmingham House Retail Limited | Wholesale & retail | 2013 |
| Birtan Ltd | Hospitality | 2018 |
| BIT Anvil Ltd | Information & communication | 2025 |
| Black Lamb Ltd | Arts & recreation | 2014 |
| BLC Safety Advisor Ltd | Public administration | 2023 |
| Blue Blimp Films Limited | Information & communication | 2018 |
| BOB Parry Estate Agents Limited | Real estate | 2017 |
| BOB Parry Lettings Ltd | Real estate | 2012 |
| Bodlondeb Accommodation Ltd | Hospitality | 2025 |
| Bodlondeb Castle Management Limited | Households | 2005 |
| Bodlondeb Innovation Ltd | Financial services | 2025 |
| Bodlondeb Parking Ltd | Transport & logistics | 2025 |
| Bonaire Leisure Ltd | Hospitality | 2016 |
| Bone & Payne LLP | | 2007 |
| Boom Sailing Limited | Education | 2016 |
| Breeze & Co (Llandudno) Ltd | Professional & scientific | 2004 |
| British Association of Mountain Guides | Other services | 1996 |
| Bron Derw Property Management Limited | Households | 2017 |
| Bron Derw Storage Limited | Hospitality | 2012 |
| Bron Derw Touring Caravan Park Limited | Hospitality | 2012 |
| Bryn Cregin Management Limited | Households | 1999 |
| Bryn Morfa Ltd | Wholesale & retail | 1965 |
| Bryn Tyrch Inn Limited | Hospitality | 2007 |
| BT North West Holdings Limited | Administrative & support | 2010 |
| Butterworths Accountants (North Wales) Limited | Extraterritorial | 2013 |
| Bwlch Farm (Deganwy) Limited | Arts & recreation | 1966 |
| C S Investment Properties Limited | Real estate | 2001 |
| C&S Technology Ltd | Information & communication | 2009 |
| Calvary Chapel Warrington | Other services | 2011 |
| Cambrian Press Ltd | Manufacturing | 2020 |
| Capture Production Studios Limited | Information & communication | 2011 |
| Caremed B2B (Europe) Limited | Wholesale & retail | 2009 |
| Caring Holidays Ltd | Hospitality | 2019 |
| Casacartref Limited | Real estate | 2014 |
| Castle Cabs (Conwy) Limited | Transport & logistics | 2001 |