| MDW Group Holdings Limited | Financial services | 2018 |
| MEE Builders Ltd | Construction | 2024 |
| Melody Jane Dolls Houses Ltd | Wholesale & retail | 2014 |
| Menter BRO Cernyw CYF | Other services | 2016 |
| Mevo Inc Limited | Arts & recreation | 2016 |
| Microbitz Computers Ltd | Wholesale & retail | 2011 |
| Mike Overthrow & Company Limited | Construction | 2010 |
| Millburn Properties NW Ltd | Real estate | 2024 |
| Milly & Milo Limited | Wholesale & retail | 2018 |
| MJS Training Limited | Administrative & support | 2017 |
| MK1 Hairdressing Ltd | Other services | 2021 |
| Mohyuddin Limited | Health & social care | 2011 |
| Montie-Leisure Ltd | Hospitality | 2019 |
| Montie-Sway Limited | Wholesale & retail | 2016 |
| Moonflower Investments 1 Ltd | Transport & logistics | 2021 |
| Moonflower Leasing Ltd | Administrative & support | 2026 |
| Morgan Lewis Limited | Real estate | 2004 |
| MSA Sales Consultancy Ltd | Administrative & support | 2025 |
| Murrays Heating Limited | Construction | 2020 |
| Nayla Counselling Academy and Therapeutic Services Ltd | Health & social care | 2023 |
| Neuadd Goffa Llanfairtalhaiarn | Arts & recreation | 2005 |
| New General Engineering Limited | Extraterritorial | 2010 |
| Newham's Fabric Maintenance Ltd | Professional & scientific | 2025 |
| Nico Chapman Limited | Professional & scientific | 2021 |
| Nicole MAY Art and Interiors Ltd | Wholesale & retail | 2022 |
| Noct Holding Limited | Health & social care | 2025 |
| Nocturnal Training & Consultancy Solutions Ltd | Wholesale & retail | 2018 |
| North Shore Funding Ltd | Professional & scientific | 2026 |
| North Wales Amusements Limited | Professional & scientific | 2007 |
| North Wales Car Sales (UK) Ltd | Wholesale & retail | 2020 |
| North Wales Holiday Homes Ltd | Hospitality | 2024 |
| North Wales Padel Ltd | Arts & recreation | 2025 |
| North Wales Security Ltd | Other services | 2018 |
| North Wales Technology Park Limited | Real estate | 2000 |
| North Wales Van Sales Limited | Wholesale & retail | 2005 |
| North West Power Ltd | Construction | 2025 |
| Northwalessparkleandclean Ltd | Administrative & support | 2026 |
| Nuzeal Ltd | Transport & logistics | 2025 |
| Nvuk Ltd | Real estate | 2022 |
| NVUK1 Ltd | Real estate | 2025 |
| NW Exterior Cleaning Ltd | Administrative & support | 2026 |
| NW Fire Sprinklers Ltd | Administrative & support | 2016 |
| NW Funeral Services Ltd | Other services | 2020 |
| O Davies Echo Ltd | Health & social care | 2024 |
| O.L.G Marquee Ltd | Hospitality | 2022 |
| Oakhome Construction NW Ltd | Construction | 2024 |
| Ocean Blue One Ltd | Construction | 2013 |
| OH Property Solutions Limited | Construction | 2019 |
| ON the Glass Limited | Administrative & support | 2024 |
| One North Medical Limited | Health & social care | 2015 |
| One North RM Ltd | Real estate | 2024 |
| Onnen Limited | Construction | 2023 |
| Onyxbox Solutions Ltd | Information & communication | 2025 |
| Optiwind Energy Ltd | Energy | 2025 |
| Oral Care Innovations Limited | Manufacturing | 2016 |
| Osian Williams Ltd | Construction | 2021 |
| Otmertold Limited | Wholesale & retail | 1965 |
| Outlaw Sailing Co Ltd | Wholesale & retail | 2015 |
| OWENSCONTRACTINGLTD25 Ltd | Transport & logistics | 2025 |
| Ozan Style Ltd | Other services | 2021 |
| P & H NW Ltd | Construction | 2023 |
| Paintek Cleaning and Maintenance Services Ltd | Administrative & support | 2015 |
| Pant Developments Limited | Real estate | 2024 |
| Paprikathyme Ltd | Hospitality | 2019 |
| Parry Davies Architects Limited | Professional & scientific | 2005 |
| Paul Onions Heating Limited | Construction | 2010 |
| PCS Domestics Ltd | Construction | 2023 |
| PCS Lettings Limited | Real estate | 2018 |
| PDP Investments Limited | Real estate | 2022 |
| PEN Y Bont Abergele Ltd | Hospitality | 2023 |
| People Thrive HR Solutions Ltd | Administrative & support | 2024 |
| PER Commercial Services Limited | Professional & scientific | 2026 |
| Peridot Signature Ltd | Health & social care | 2026 |
| Phoenix RUG and Carpet Cleaning Ltd | Administrative & support | 2023 |
| Phutping Limited | Manufacturing | 2015 |
| Pilgrim Fitness Ltd | Arts & recreation | 2015 |
| Pippaspaws Ltd | Wholesale & retail | 2020 |
| PNS Window Cleaning Limited | Administrative & support | 2018 |
| Pods-Cymru Ltd | Manufacturing | 2022 |
| Pont Y Gwyddel CYF | Hospitality | 2021 |
| PQF Holdings Limited | Financial services | 1999 |
| Premier Pizza and Kebab Ltd | Hospitality | 2024 |
| Primeclicks Limited | Wholesale & retail | 2020 |
| Proarb Tree Care Ltd | Administrative & support | 2025 |
| Professional Coating Services Ltd | Construction | 2016 |
| PTS Energy Properties Ltd | Real estate | 2024 |
| PTW Utilities Limited | Construction | 2023 |
| Quirky Huts Ltd | Administrative & support | 2017 |
| Rainbows & Dragons Ltd | Wholesale & retail | 2020 |
| Rangmahol Limited | Real estate | 2021 |
| Raycom Surveying Limited | Information & communication | 2002 |
| Red Daffodils Ltd | Professional & scientific | 2012 |
| Red Dragon Deals Ltd | Real estate | 2024 |
| Refresh Renovations Ltd | Construction | 2023 |
| Response Medical & Event Medics Limited | Health & social care | 2025 |
| Rhos Point Limited | Arts & recreation | 2020 |
| Rhos Point Trading Limited | Arts & recreation | 2020 |
| Richardson Builders & Joiners Limited | Construction | 2015 |
| Rising Edge Control Solutions Limited | Professional & scientific | 2005 |
| RJR Kitchen & Bedroom Designs Ltd | Wholesale & retail | 2024 |