| 08 UK Ltd | Information & communication | 2007 |
| 1 Victoria Street Management Company Limited | Professional & scientific | 2001 |
| 121 Technology Ltd | Information & communication | 1996 |
| 138 Lower Cheltenham Place Management Company Limited | Households | 2013 |
| 17CH Ltd | Hospitality | 2022 |
| 18 Caroline Road Limited | Households | 2017 |
| 18 Lloyd Street Management Company Limited | Real estate | 2008 |
| 1862 Great Orme Water Ltd | Manufacturing | 2023 |
| 2 Clifton Road (Llandudno) Limited | Professional & scientific | 2010 |
| 24-26 Deganwy Avenue RTM Company Limited | Households | 2016 |
| 27 Deganwy Avenue Limited | Professional & scientific | 2008 |
| 29 Warden Road Management Company Ltd | Households | 2012 |
| 2ME Group Ltd | Administrative & support | 2025 |
| 3 & 3A Maelgwyn Road Limited | Real estate | 2018 |
| 3 Point Management Systems Ltd | Professional & scientific | 2021 |
| 32 Mostyn Avenue Limited | Real estate | 1991 |
| 34 Lloyd Street Limited | Households | 2009 |
| 39 Abbey Road (Llandudno) Management Company Limited | Households | 2004 |
| 3D Investment Property Limited | Construction | 2019 |
| 4 Smart (Cheltenham) Limited | Wholesale & retail | 2023 |
| 4.1 Trading Ltd | Construction | 2025 |
| 5 Howard Road (Llandudno) Limited | Real estate | 2016 |
| 6 York Road Management Limited | Households | 2018 |
| 7 Clement Avenue Management Company Limited | Households | 2008 |
| 78 Church Walks Management Company Limited | Households | 2004 |
| 8 Upper Promenade Management Limited | Households | 2007 |
| 8M2 Limited | Administrative & support | 2013 |
| 9 Bodhyfryd Road Management Company Limited | Hospitality | 2018 |
| A D Lease Ltd | Real estate | 2019 |
| A Khalifa Limited | Health & social care | 2022 |
| A Piece of Cake (Gogledd Cymru) CYF | Hospitality | 2018 |
| A to B Digital Marketing Ltd | Professional & scientific | 2017 |
| A Toner Limited | Construction | 2013 |
| A V C Security Ltd. | Administrative & support | 2021 |
| A&A Removals Ltd | Transport & logistics | 2020 |
| A55 Asbestos Ltd | Professional & scientific | 2019 |
| AB Risk Limited | Professional & scientific | 2008 |
| Aberconway Consulting Limited | Professional & scientific | 2018 |
| Aberconwy Properties Ltd | Real estate | 2016 |
| About YOU Boutique Ltd | Wholesale & retail | 2017 |
| Accurate Roofing (Wales) Limited | Construction | 2006 |
| ACT Electrical NW Ltd | Construction | 2020 |
| Activiz Ltd | Manufacturing | 2020 |
| Aczel Limited | Extraterritorial | 2023 |
| Adam Fairbrother Consultancy Limited | Professional & scientific | 2017 |
| Adam Parkinson Ltd | Extraterritorial | 2021 |
| Adamson Jones the Salon Ltd | Administrative & support | 2018 |
| Adapt Behaviour Ltd | Education | 2024 |
| Addlan Properties Limited | Real estate | 2024 |
| Adenydd LLP | | 2008 |
| Adil Hatay Ltd | Hospitality | 2025 |
| Airfix Limited | Professional & scientific | 1988 |
| AJJ Driver Solution Ltd | Other services | 2015 |
| Alan Lawrie Consulting Limited | Administrative & support | 2025 |
| Alexander Moore (NW) Ltd | Financial services | 2026 |
| Alfred Samuel Hairdressing Ltd | Other services | 2024 |
| ALL Things Air (ATA) Ltd | Construction | 2012 |
| Alliance Fitness Limited | Arts & recreation | 2019 |
| Altgaming Ltd | Information & communication | 2020 |
| Alwyn L Parry Limited | Health & social care | 2016 |
| Amacc (INT) Limited | Professional & scientific | 2009 |
| Amaeth Hafod Limited | Manufacturing | 2011 |
| Amalfi Court Management Limited | Households | 1989 |
| Amerex Limited | Manufacturing | 1997 |
| Amerex Services Limited | Manufacturing | 1979 |
| Amesmount Management Limited | Households | 1994 |
| Amethyst Jewellery Workshop Ltd. | Wholesale & retail | 2002 |
| AMJ Power Installation Ltd | Construction | 2023 |
| AMX Energy Services Limited | Energy | 2021 |
| AMX Services Limited | Manufacturing | 2001 |
| Anarkali.Rhyl Limited | Hospitality | 2025 |
| Andy Turvey Limited | Information & communication | 2015 |
| Andygoodman Limited | Professional & scientific | 2019 |
| Anex Limited | Financial services | 2026 |
| Annan Holidays Ltd | Administrative & support | 2018 |
| Antena Cyfyngedig | Information & communication | 1998 |
| Antur Adventures Ltd | Transport & logistics | 2019 |
| Apegg Solutions Limited | Energy | 2017 |
| Aperire Ltd | Education | 2014 |
| Apparent Properties Limited | Real estate | 2008 |
| APR Heating Limited | Construction | 2021 |
| Aqualogik Ltd | Wholesale & retail | 2019 |
| Aquareach Limited | Administrative & support | 2008 |
| Aran Roberts Kitchen & Bedrooms Ltd | Wholesale & retail | 2018 |
| Arcturian Consultancy Limited | Professional & scientific | 2015 |
| Arundel Vinste Ltd | Hospitality | 2021 |
| Asbestos Solutions (North Wales) Limited | Extraterritorial | 2006 |
| Ascardo Ltd | Professional & scientific | 2011 |
| Ascot Court (Llandudno) Limited | Households | 1981 |
| Ashcroft Family Vets Ltd | Extraterritorial | 2024 |
| Ashworth Civil Engineering Ltd | Construction | 2024 |
| Aspect Esports Ltd | Manufacturing | 2025 |
| Atei Consulting Ltd | Information & communication | 2014 |
| ATL Professional Services Limited | Professional & scientific | 2018 |
| ATL Property Holdings Ltd | Real estate | 2020 |
| Atom Scaffolding Ltd | Construction | 2019 |
| Auhay Holdings Limited | Real estate | 2023 |
| Autolevel Ltd | Construction | 2015 |
| Aviation Admin Ltd | Administrative & support | 2023 |
| Avixor Limited | Financial services | 2026 |