| Anglesey Creations Ltd | Extraterritorial | 2021 |
| Anglesey Electrician Ltd | Construction | 2025 |
| Anglesey GIN Company Ltd | Extraterritorial | 2017 |
| Anglesey Van's Ltd | Manufacturing | 2021 |
| Applied Intelligence Limited | Extraterritorial | 2016 |
| Arena Motor Company Limited | | 1979 |
| B and M Contracts Ltd | Agriculture & fishing | 2025 |
| Brefu CYF | Agriculture & fishing | 2021 |
| Dalylake Limited | | 1981 |
| Fairwey Hire Cars (Weybridge) Limited | | 1978 |
| Forrest-Owen Ltd | Hospitality | 2023 |
| GER Y MOR Developments Ltd | Construction | 2025 |
| HRH Contractors Limited | Construction | 2016 |
| I T Edwards Building Contractors Limited | Construction | 2009 |
| Intuition Healthcare Ltd | Professional & scientific | 2020 |
| J Ellis Williams & Sons (Rhosneigr) Limited | Construction | 2000 |
| Kingsway Safety Systems Limited | | 1983 |
| Kite Management Services Limited | Professional & scientific | 2015 |
| Lisa Fowlie Health & Safety Consultants Ltd | Public administration | 2015 |
| Llanddwyn Ice Cream Ltd | Hospitality | 2026 |
| Llewelyn Berffro CYF | Hospitality | 2025 |
| Magnuggit Livery CYF. | Agriculture & fishing | 2024 |
| Mead Deliveries Ltd | Transport & logistics | 2025 |
| Mon-Ot Ltd | Health & social care | 2009 |
| Money Mindset Partners CIC | Health & social care | 2026 |
| O.J.Roberts & Co Ltd | Agriculture & fishing | 2013 |
| Patapata Ltd | Manufacturing | 2023 |
| Raybridge Brickwork Limited | | 1979 |
| Raynes Park Service Station Limited | | 1962 |
| RDO Pest Management Ltd | Administrative & support | 2023 |
| S. & M.J. Quinn Enterprises Limited | | 1979 |
| Security Financial Services Ltd | Financial services | 1995 |
| Shema Westwell Ltd | Administrative & support | 2025 |
| SPC Venture Ltd | Professional & scientific | 2015 |
| Stow Couriers Ltd | Transport & logistics | 2025 |
| Stuart Sons & Daughters Ltd | Agriculture & fishing | 2025 |
| Trac MON Ltd | Education | 2003 |
| W. & C. Craig Limited | | 1976 |
| West Street Engineering (Woking) Limited | | 1962 |
| Wilffing IT Ltd | Information & communication | 2026 |