| A T L Heating Ltd | Construction | 2012 |
| A1 Electrical Testing & Installation Limited | Construction | 2011 |
| Adam Hoyle Associates Limited | Administrative & support | 2016 |
| ALE Plumbing & Heating Ltd | Construction | 2020 |
| AYE Software Limited | Information & communication | 2014 |
| BSE Projects Ltd | Professional & scientific | 2024 |
| Buzzways Ltd | Transport & logistics | 2025 |
| C & K B Properties Limited | Real estate | 2002 |
| Castle Cottage (Harlech) Limited | Hospitality | 2003 |
| Castle Cottage Inn Limited | Hospitality | 2020 |
| Charlotte Samuels Ltd | Health & social care | 2013 |
| Coastal-Lets Ltd | Hospitality | 2020 |
| Coleg Harlech Ltd | Real estate | 2020 |
| Colin Pugh Properties Limited | Households | 2025 |
| Criccieth Beach House Limited | Hospitality | 2021 |
| Crown Lodge Harlech Limited | Hospitality | 2019 |
| Damsel in This Dress Limited | Wholesale & retail | 2016 |
| EIN TAI Ltd | Real estate | 2025 |
| FFA DA Ltd | Manufacturing | 2020 |
| FOLIO50 Ltd | Wholesale & retail | 2014 |
| Furnex Ltd | Administrative & support | 2016 |
| GMH Financial Consultants Ltd | Administrative & support | 2017 |
| Green Mill Building Services Limited | Construction | 2010 |
| Gwyllt S Wilderness Limited | Hospitality | 2019 |
| Harlech and Ardudwy Leisure | Arts & recreation | 2010 |
| Harlech Community Investment CIC | Construction | 2026 |
| Harlech House Ltd | Hospitality | 2021 |
| Iridium HRD Consulting Limited | Professional & scientific | 2003 |
| JPJ Author - Technical Services Ltd | Professional & scientific | 2024 |
| Kbax Limited | Professional & scientific | 2021 |
| KJI Developments Ltd | Professional & scientific | 2023 |
| Llyr Roberts Construction Limited | Construction | 2024 |
| Locker Enterprises Ltd | Hospitality | 2005 |
| Lucy Freeman Limited | Professional & scientific | 2012 |
| M L Property Homes LLP | | 2013 |
| Merthyr Farm Campsite Ltd | Hospitality | 2019 |
| Murmur Y MOR Limited | Manufacturing | 2022 |
| Nextgen Energi Ltd | Construction | 2026 |
| Parkright Enterprise Ltd | Administrative & support | 2025 |
| Perch-Jones Ltd | Construction | 2025 |
| Phil Hughes Stoves Ltd | Construction | 2022 |
| Re-Gen Exterior Cleaning Ltd | Administrative & support | 2026 |
| Rissbrook Solutions Limited | Mining & quarrying | 2024 |
| Royal ST David's Golf Club Limited | Hospitality | 2017 |
| Royal ST. David's Golf Club Trading Limited | Arts & recreation | 2016 |
| Sawyer and Family Limited | Households | 2025 |
| SD Golf Ltd | Wholesale & retail | 2025 |
| Space Group UK Limited | Construction | 1995 |
| Space Living Limited | Real estate | 2002 |
| Special Places Harlech Ltd | Hospitality | 2014 |
| Stainless Design Llanbedr Limited | Other services | 2014 |
| Subscription Golf Clubs Ltd | Wholesale & retail | 2025 |
| Teach Health 4 Kids Ltd | Education | 2015 |
| THE Harlech Grocer Limited | Wholesale & retail | 2020 |
| THE Natural Advantage Limited | Extraterritorial | 2011 |
| Theatr Ardudwy Limited | Arts & recreation | 2021 |
| Uwchglan Glamping Limited | Hospitality | 2024 |
| Wildworks Limited | Hospitality | 2002 |
| Y Copa Ltd | Hospitality | 2025 |