| Monk Farms Ltd | Agriculture & fishing | 2010 |
| Monk Transport Group Limited | Agriculture & fishing | 2012 |
| Moore & SON (Holywell) Limited | Construction | 2000 |
| Moore & SON Real Estate Ltd | Real estate | 2021 |
| Moore Bros Tiling Contractors Limited | Construction | 2007 |
| Morris Grant Ltd | Construction | 2023 |
| MOS Heating Ltd | Other services | 2023 |
| Mostech Energy Services Limited | Transport & logistics | 2013 |
| Mostyn Docks Limited | Transport & logistics | 1980 |
| Mostyn Farm Ride Limited | Arts & recreation | 2011 |
| Mostyn Industrials Ltd. | Wholesale & retail | 2023 |
| Mostyn Maritime Services Limited | Transport & logistics | 1994 |
| Mostyn Terminals Limited | Transport & logistics | 2003 |
| MPM (NW) Limited | Financial services | 2019 |
| MR J Enterprises Ltd | Manufacturing | 2020 |
| MSG Electrical Services Ltd | Construction | 2021 |
| MUNCHIES(LUDLOW)2019 Limited | Hospitality | 2019 |
| MVC Electrical Limited | Construction | 2014 |
| My Compliance Alliance Limited | Extraterritorial | 2022 |
| My Other ME Ltd | Information & communication | 2024 |
| Myers Couriers Ltd | Transport & logistics | 2024 |
| Mytra Limited | Construction | 2010 |
| N a Cochran Limited | Construction | 2024 |
| N R Windows Limited | Construction | 2009 |
| N S J S Associates Limited | Professional & scientific | 2013 |
| N.W.C. Business Forms Limited | Administrative & support | 1987 |
| Nannerch Heights Ltd | Hospitality | 2019 |
| Nant Bach Caravan Site Limited | Hospitality | 2023 |
| National Holiday & Home Parks Alliance Limited | Information & communication | 2017 |
| Nationwide Insulation & Plastering Ltd | Construction | 2025 |
| Nayeke Limited | Real estate | 2024 |
| NB PPM Consultants Ltd | Professional & scientific | 2023 |
| Neil Lynchehaun Consulting Ltd | Professional & scientific | 2017 |
| Neil Lynchehaun Photography Ltd | Professional & scientific | 2019 |
| NEO Redshift Limited | Real estate | 2021 |
| Nerdy Neanderthals Ltd | Manufacturing | 2023 |
| Newfoundland (Holywell) Limited | Real estate | 2005 |
| Newfoundland (Pandy) Ltd | Real estate | 2021 |
| Newstrike Limited | Professional & scientific | 1986 |
| Next Day Hedges Ltd | Agriculture & fishing | 2017 |
| Next Level Insulation Ltd | Construction | 2025 |
| Next Network Ltd | Information & communication | 2023 |
| Nexus Creative Spaces Ltd | Administrative & support | 2024 |
| Nimbul Systems Limited | Information & communication | 2025 |
| Noah's Wood Limited | Wholesale & retail | 2016 |
| North Wales Advanced Motorcyclists Ltd | Other services | 2004 |
| North Wales Paving & Landscaping Ltd | Administrative & support | 2024 |
| North Wales Properties Limited | Hospitality | 2016 |
| North Wales Radiators Limited | Manufacturing | 2013 |
| North Wales Technical Services Limited | Information & communication | 2000 |
| North West Lifting Specialists Limited | Construction | 2023 |
| North West Supported Community Housing Limited | Health & social care | 2008 |
| Northwest Brick and Stone Limited | Wholesale & retail | 2004 |
| Nourished PAW Ltd | Wholesale & retail | 2025 |
| Nuage Technology Ltd | Other services | 2011 |
| NW Cozy Retreats Ltd | Hospitality | 2021 |
| NW Getaways Ltd | Hospitality | 2025 |
| NW Mortgage Advice Limited | Financial services | 2018 |
| NW Trade Centre Limited | Wholesale & retail | 2021 |
| NWC Cleaning Services Ltd | Administrative & support | 2025 |
| O35TOUR International Ltd | Arts & recreation | 2025 |
| Oak Evolution Ltd | Professional & scientific | 2023 |
| OF Welding Solution Ltd | Manufacturing | 2024 |
| Offshore Energy Services Limited | Administrative & support | 2016 |
| One Martial Arts Ltd | Education | 2020 |
| One Plas Wales Limited | Real estate | 2025 |
| One Step Holywell CIC | Education | 2022 |
| Optical Tools for Industry Limited | Manufacturing | 2005 |
| Orbital Equipment Group Limited | Financial services | 2021 |
| Orbital Equipment Limited | Administrative & support | 1999 |
| Orca Integrated Systems Ltd | Manufacturing | 2020 |
| OSG Limited | Wholesale & retail | 2008 |
| Outer Pixels Ltd | Information & communication | 2023 |
| Owen & Pierce Garages Limited | Wholesale & retail | 2002 |
| Owens Bryn 0382 Limited | Transport & logistics | 2014 |
| P D and Sons Roofing and Building Ltd | Construction | 2026 |
| P80 Consulting Limited | Administrative & support | 2023 |
| Paint IT Green CIC | Construction | 2025 |
| Pangborn (UK) Limited | Manufacturing | 1991 |
| Pangborn Limited | Manufacturing | 2006 |
| Parkinson & Crossley Brickworks Ltd | Construction | 2015 |
| Paws & Whistle Ltd | Wholesale & retail | 2026 |
| PB Housing Ltd | Real estate | 2015 |
| Pen-Y-Glol Limited | Hospitality | 2008 |
| Pen-Y-Pyllau Management Company Limited | Households | 2016 |
| Pennant Resort Limited | Hospitality | 2023 |
| Peter Anton Limited | Transport & logistics | 2013 |
| Peter James & Sons Ltd | Transport & logistics | 2014 |
| Peter Moss Limited | Wholesale & retail | 1988 |
| Phil Roberts Auto Repairs Ltd | Wholesale & retail | 2005 |
| Phil Spencer Engineering Limited | Manufacturing | 2012 |
| Phill Clayton Plumbing & Heating Ltd | Construction | 2015 |
| Pistyll Company Limited | Real estate | 2022 |
| Pistyll Developments Limited | Real estate | 2022 |
| Pitstone Homes Ltd | Real estate | 2025 |
| Point of AYR FC CIC | Education | 2025 |
| Poole and Parry Properties Ltd | Real estate | 2025 |
| Pools to Schools NW Ltd | Education | 2026 |
| Pottles Premier Plants Ltd | Agriculture & fishing | 2002 |
| Pragmatica Web Solutions Ltd | Information & communication | 2010 |