| Marcw Ltd | Construction | 2020 |
| Masnach Canolfan CYF | Other services | 2023 |
| Matt Ward Property Services Limited | Construction | 2025 |
| MDF Recovery Limited | Water & waste | 2009 |
| Mdfr Natural Fibres Ltd | Water & waste | 2011 |
| MEG Doyle Limited | Wholesale & retail | 2025 |
| Meghna (N.W) Limited | Hospitality | 2019 |
| Menai Homes Ltd | Real estate | 2024 |
| Mission Resilience LLP | | 2024 |
| Mjmco Ltd | Transport & logistics | 2025 |
| MR & MRS S Ltd | Wholesale & retail | 2019 |
| Nick Parker Consulting Limited | Professional & scientific | 2002 |
| North Menswear Limited | Wholesale & retail | 2003 |
| North West Venturers Yacht Club Limited | Arts & recreation | 2020 |
| Obouo Music Limited | Information & communication | 2011 |
| Olivers Hospitality Ltd | Hospitality | 2024 |
| P D Rentals Limited | Real estate | 2007 |
| Parys Uchaf Management Ltd | Households | 2022 |
| Pentraeth Green Limited | Extraterritorial | 2003 |
| Pentraeth Green Management Limited | Real estate | 2006 |
| Pfpm Limited | Professional & scientific | 2003 |
| Philip Woodward Electrical Services Ltd | Construction | 2019 |
| Pier House Properties Limited | Hospitality | 2004 |
| Pippa Thomas Associates Limited | Information & communication | 2005 |
| Pippa Thomas Property Limited | Construction | 2019 |
| PK Box Ltd | Manufacturing | 2021 |
| Plas Bodfa Projects CIC | Arts & recreation | 2023 |
| POB LWC Ltd | Construction | 2025 |
| Poplars Homes Ltd | Construction | 2026 |
| Prestige People Ltd | Administrative & support | 2024 |
| Puffin Events Limited | Hospitality | 2009 |
| PYE Scholes Limited | Agriculture & fishing | 2018 |
| R & C Newton Beaumaris Limited | Wholesale & retail | 2014 |
| R G Hughes Groundworks Limited | Construction | 2022 |
| Raglan Street Management Company Ltd | Households | 2017 |
| Red Squirrels Trust Wales Ltd | Other services | 2007 |
| Requidex Limited | Information & communication | 2023 |
| Roadrider Despatch Limited | Transport & logistics | 1986 |
| Rockbird Ltd | Hospitality | 2026 |
| Roger Booth & Company Limited | Financial services | 1970 |
| Roger Richards Film & TV Production Limited | Information & communication | 2003 |
| Rope Properties Limited | Real estate | 2026 |
| Ruby Maes Limited | Hospitality | 2021 |
| Saith Punt Investments Ltd | Hospitality | 2023 |
| Sarisa Kitchen Beaumaris Limited | Hospitality | 2025 |
| Screen First Limited | Information & communication | 1984 |
| Seascape Healthcare Solutions Ltd | Professional & scientific | 2025 |
| Second Star Marketing Ltd | Professional & scientific | 2025 |
| Seguin Consulting Ltd | Professional & scientific | 2021 |
| Shaws Technical Services Ltd | Construction | 2013 |
| Sourceconnect Exchange Limited | Hospitality | 2015 |
| South Klein Property Ltd | Households | 2019 |
| SP Sigma Projects Ltd | Professional & scientific | 2026 |
| Stanford Corporate Services Ltd | Professional & scientific | 2014 |
| Straight Development Ltd | Construction | 2018 |
| Stuart F Consultancy Ltd | Professional & scientific | 2025 |
| Surma Beaumaris Limited | Hospitality | 2022 |
| Syrcas - Circus Ltd. | Education | 1996 |
| TE Renewables Ltd | Manufacturing | 2023 |
| THE Beau Book Nook Ltd | Wholesale & retail | 2025 |
| THE Bulkeley Anglesey Ltd | Hospitality | 2025 |
| THE Curated Studio SET Ltd | Professional & scientific | 2026 |
| THE Exchange (Beaumaris) Ltd | Wholesale & retail | 2021 |
| THE Farmhouse Benllech Ltd | Hospitality | 2024 |
| THE Penpot Quill and Red Ship Trading Company Limited | Other services | 1995 |
| THE Pilot House Cafe Limited | Hospitality | 2022 |
| Tinkers & Belles Ltd | Wholesale & retail | 2012 |
| TJW Management Consulting Ltd. | Professional & scientific | 2013 |
| TM Business Ventures Ltd | Hospitality | 2021 |
| Topa Ltd | Administrative & support | 2021 |
| Trading Skills Limited | Professional & scientific | 2001 |
| VAS Worldwide Consultancy Limited | Information & communication | 1997 |
| Welsbyhoward Ltd | Wholesale & retail | 2024 |
| Wern Hall Management Company Limited | Households | 1998 |
| Wern Y Wylan Maintenance Limited | Real estate | 2005 |
| West Didsbury Village Limited | Real estate | 2006 |
| West Didsbury Village Management (1) Limited | Households | 2019 |
| Wexham Place Ltd | Households | 2011 |
| Whirly Lollies Ltd | Wholesale & retail | 2015 |
| White Beach Limited | Hospitality | 2011 |
| Wildside Food Ltd | Manufacturing | 2019 |
| Wylan Ltd | Households | 2015 |
| XWC Limited | Manufacturing | 2024 |