| 34CASTLE Limited | Manufacturing | 2023 |
| 6IX Creative Ltd | Professional & scientific | 2020 |
| 92 Mill Lane (Macclesfield) Management Company Limited | Real estate | 2021 |
| A-Z Lettings Ltd | Real estate | 2021 |
| A-Z Painting Ltd | Construction | 2016 |
| Abacus 2012 Limited | Wholesale & retail | 2011 |
| ABC Upvc Windows Ltd | Other services | 2025 |
| Aber Flats Management Company Limited | Real estate | 2015 |
| AED Cloud Limited | Real estate | 2014 |
| Agsv Hold.Co Limited | Financial services | 2025 |
| Alice Field Ltd | Other services | 2025 |
| Amanzi Marine Services Limited | Wholesale & retail | 2017 |
| Amanzi Safety Advisory Ltd | Professional & scientific | 2022 |
| Amanzi Safety and Rescue Limited | Education | 2016 |
| Amplia Consulting Limited | Professional & scientific | 2005 |
| Anglesey Aquaculture Limited | Agriculture & fishing | 2011 |
| Anglesey Bike Repairs Limited | Wholesale & retail | 2017 |
| Anglesey Engineering & Design Ltd. | Hospitality | 2013 |
| Article Store Limited | Wholesale & retail | 2022 |
| Attila Balog Ltd | Construction | 2013 |
| Audacious Marine Services Ltd | Manufacturing | 2018 |
| Bangor Market Company Limited | Professional & scientific | 1977 |
| Beaumaris Baths Limited | Hospitality | 2021 |
| Beaumaris Nuclear Limited | Professional & scientific | 2023 |
| Beaumaris Property Ltd | Real estate | 2016 |
| Bodfa Limited | Hospitality | 2015 |
| Bomo Cottages Ltd | Hospitality | 2023 |
| Breezy Island Ltd | Wholesale & retail | 2025 |
| Bryn Gwyn Estates Ltd | Real estate | 2021 |
| Building Dreams Limited | Real estate | 2012 |
| Bullen Conservation (Wales) Ltd | Construction | 2022 |
| Cadnant Court (Beaumaris) Limited | Households | 1990 |
| Cadrod CYF | Construction | 2005 |
| CAN Punt Limited | Real estate | 2023 |
| Can-Do Connections CIC | Education | 2024 |
| Can-Do IP Holdings Ltd | Information & communication | 2026 |
| Canolfan Hamdden Beaumaris A'R Cylch | Arts & recreation | 2012 |
| Carpiog Ltd | Professional & scientific | 2017 |
| Castell Lleiniog Homes Ltd | Construction | 2021 |
| Castle Square Apartments Limited | Hospitality | 2006 |
| Chapel Court Management (Beaumaris) Limited | Real estate | 1998 |
| CJT Developments Limited | Wholesale & retail | 2002 |
| Clementjoesimonnet Limited | Wholesale & retail | 2025 |
| Criador Investments Limited | Real estate | 2002 |
| Crosswindtech Ltd | Construction | 2025 |
| Cwmni Tafarn Cymru Limited | Hospitality | 2006 |
| CWW Consulting Ltd | Professional & scientific | 2012 |
| Cyclo Music Limited | Information & communication | 1997 |
| D.Hallett Consulting Ltd | Construction | 2014 |
| David W Rowlands Limited | Real estate | 2007 |
| DDJ Capital Partners Ltd | Real estate | 2025 |
| Dessert Cafe Ltd | Hospitality | 2026 |
| Dicko & Co Limited | Real estate | 2006 |
| Digital Credentials Limited | Education | 2021 |
| Dixons Realty Ltd | Construction | 2014 |
| Draig Data Centres Ltd | Information & communication | 2025 |
| Eastern Origin Restaurant Ltd. | Hospitality | 2003 |
| Emily Knowles Limited | Information & communication | 2020 |
| Eventus Europe Limited | Information & communication | 2020 |
| F J Developments (Anglesey) Limited | Real estate | 2004 |
| Factmere Limited | Hospitality | 1981 |
| Fianchetto Assets Ltd | Real estate | 2025 |
| Four Esthers Ltd | Hospitality | 2025 |
| Future Wave Consulting Ltd | Information & communication | 2013 |
| G & H Brant Ltd | Information & communication | 2013 |
| Gorwell TKF Ltd | Real estate | 2021 |
| Grŵp Natur Seiriol C.B.C. | Professional & scientific | 2024 |
| Gwyl Beaumaris Festival | Arts & recreation | 1994 |
| H-Digital Ltd | Information & communication | 2013 |
| Herb Garden (Anglesey) Management Co Ltd | Real estate | 2019 |
| HEY Advice Ltd | Financial services | 2014 |
| HEY Property 1 Ltd | Real estate | 2015 |
| HEY Squirrel Property Ltd | Real estate | 2021 |
| Hobbs Design & Developments Ltd | Administrative & support | 2015 |
| Home and Cruise Limited | Administrative & support | 2010 |
| Home Collect Limited | Wholesale & retail | 2020 |
| Home From Home Transitions Ltd | Professional & scientific | 2026 |
| Hydeout Menai Ltd | Hospitality | 2026 |
| Inndex Limited | Information & communication | 2017 |
| Janet Bell Art Ltd | Wholesale & retail | 2007 |
| JMS Double Glazing Ltd | Construction | 2017 |
| Joanne Jones Online Limited | Health & social care | 2021 |
| John Wood Holdings Limited | Real estate | 2006 |
| John Wood Property Limited | Agriculture & fishing | 1971 |
| Jolie Consultancy Ltd | Administrative & support | 2014 |
| Jollys Coffee Limited | Hospitality | 2021 |
| K.R.H. Properties Limited | Real estate | 1991 |
| Klein Consultancy & Advice Ltd | Professional & scientific | 2019 |
| L29 Limited | Professional & scientific | 2007 |
| LH Offshore Limited | Agriculture & fishing | 2026 |
| Libertine Enterprises Limited | Manufacturing | 2018 |
| Libertine Limited | Hospitality | 2015 |
| Lime & Flower Limited | Wholesale & retail | 2021 |
| Little Lane Stores Ltd | Wholesale & retail | 2019 |
| Little Yellow House Limited | Professional & scientific | 2020 |
| Llyn Jane Limited | Real estate | 2010 |
| Lotti Summers Fine Art and Ceramics Ltd. | Wholesale & retail | 2020 |
| Lotti Summers Ltd | Professional & scientific | 2006 |
| LSC Catering Beaumaris Ltd | Hospitality | 2026 |
| Management, Build and Design Ltd | Construction | 2003 |