| Neil Barlow Ltd | Construction | 2014 |
| Neil Corking Ltd | Professional & scientific | 2023 |
| Neil Picton Ltd | Construction | 2026 |
| Nerth DY BEN Cyfyngedig | Information & communication | 2021 |
| Network Energy Group Limited | Construction | 2023 |
| Newo Tyres Limited | Wholesale & retail | 2023 |
| Nexus Connect Limited | Wholesale & retail | 2012 |
| Ngwatt Limited | Professional & scientific | 2014 |
| NH Property (N.Wales) Limited | Real estate | 2017 |
| Nicotech Limited | Manufacturing | 2017 |
| Nigel Heckman Limited | Financial services | 2016 |
| Njplanning Ltd | Professional & scientific | 2022 |
| NK Strategy Limited | Administrative & support | 2022 |
| Noah's ARK! Ltd | Wholesale & retail | 2026 |
| Nook Equestrian Ltd | Agriculture & fishing | 2025 |
| North Coast Heating and Renewables Ltd | Construction | 2026 |
| North PB Limited | Information & communication | 2004 |
| North Shore Holdings Ltd | Real estate | 2018 |
| North Wales Construction Services Limited | Construction | 2009 |
| North Wales Fire Protection Limited | Professional & scientific | 2001 |
| North Wales Foot Care Limited | Health & social care | 2012 |
| North Wales Hot TUB Services Ltd | Administrative & support | 2015 |
| North Wales International Music Festival Limited | Arts & recreation | 1979 |
| North Wales Offshore Services Ltd | Administrative & support | 2017 |
| North Wales Orthopaedics and Health LLP | | 2019 |
| North Wales Resin Drives Ltd | Construction | 2002 |
| North Wales Resin Solutions Ltd | Administrative & support | 2025 |
| North Wales Shutters & Blinds Ltd | Other services | 2016 |
| North Wales Stoves Limited | Wholesale & retail | 2009 |
| North Wales Tutor Hub Ltd | Education | 2025 |
| Northern Light Tarot Limited | Information & communication | 2018 |
| Nowak Services Ltd | Administrative & support | 2010 |
| Nprocure Ltd | Professional & scientific | 2016 |
| Nuffield Medical Ltd | Health & social care | 2019 |
| NW Commercial Property Solutions Ltd | Administrative & support | 2021 |
| Nwish Ltd | Health & social care | 2015 |
| O'Brien Medical Ltd | Health & social care | 2026 |
| Oak Mortgage & Protection Limited | Financial services | 2025 |
| OAR Developments Limited | Real estate | 2024 |
| Obstetrica Ltd | Health & social care | 2020 |
| Ocean Marine Research Limited | Professional & scientific | 2002 |
| Ocean Marine Services Limited | Transport & logistics | 2003 |
| Oceanic Green Ltd | Professional & scientific | 2020 |
| OFF Road Tyres & Wheels UK Limited | Wholesale & retail | 2019 |
| Offshore Wind Power Marine Services Limited | Transport & logistics | 2006 |
| OIL Analysis Laboratories Ltd | Professional & scientific | 2018 |
| OJP Enterprises Limited | Financial services | 2021 |
| OLI Powell Tour Services Ltd | Professional & scientific | 2013 |
| Olive Offshore Energy Ltd | Professional & scientific | 2026 |
| Openside Management Services Ltd | Professional & scientific | 2017 |
| OPH Strength & Conditioning Ltd | Other services | 2026 |
| Opplestone Holdings Ltd | Financial services | 2026 |
| Orbiss Ltd | Information & communication | 2006 |
| Orhan Electrical Limited | Manufacturing | 2007 |
| Osdane Ltd | Hospitality | 2024 |
| Oshwash Limited | Wholesale & retail | 2014 |
| Otis Barbershop Ltd | Other services | 2022 |
| P L Properties Limited | Real estate | 2014 |
| P Marshall Electrical Contractors Ltd | Construction | 2019 |
| P P a Limited | Manufacturing | 1997 |
| Padcouriers 68 Ltd | Other services | 2018 |
| Panorama Pods Limited | Hospitality | 2017 |
| Panoramic Llandudno Limited | Extraterritorial | 2006 |
| Papillon Sisters Ltd | Real estate | 2026 |
| Parkcity Multitrade Ltd | Construction | 2012 |
| Parkcity Painting Limited | Construction | 2019 |
| Parker Equine & Tuition Ltd | Agriculture & fishing | 2014 |
| Parkers Automatic Supplies Limited | Real estate | 1958 |
| Parkers Leisure (Holdings) Limited | Arts & recreation | 1958 |
| Parry Scholes & Co Ltd | Professional & scientific | 1994 |
| Parven Limited | Professional & scientific | 2014 |
| Passion for Property Chester Limited | Real estate | 2018 |
| Pathum Limited | Wholesale & retail | 2020 |
| Patricia Goodwin Skinaesthetics Ltd | Other services | 2011 |
| Paul Allen's Taxi's Ltd | Other services | 2018 |
| Paul Jennings Surveys Ltd | Professional & scientific | 2014 |
| Paul O'Donoghue Consultancy Limited | Information & communication | 2018 |
| PB AIM Ltd | Professional & scientific | 2016 |
| Peake Transport Ltd | Transport & logistics | 2021 |
| Pencadlys Gogledd Cymru CYF | Hospitality | 2023 |
| Penelope Webb Ltd | Professional & scientific | 2012 |
| Pengwern Agri Limited | Agriculture & fishing | 2017 |
| Penisa'R Mynydd Caravan Park Ltd | Hospitality | 2013 |
| Penlington Brickworks Limited | Construction | 2011 |
| Pennant Farm Management Company Limited | Real estate | 2010 |
| Penrhyn Architecture Limited | Professional & scientific | 2026 |
| People in Progress Limited | Information & communication | 1996 |
| Perfect Dreams (Llandudno) Ltd | Other services | 2014 |
| Perham Apparel Ltd | Manufacturing | 2021 |
| Perham Prints Ltd | Manufacturing | 2018 |
| Persicle Limited | Agriculture & fishing | 1997 |
| Peruvian Secrets Limited | Administrative & support | 2000 |
| Pet Funeral Services Limited | Other services | 1999 |
| PFS Holdings Ltd | Financial services | 2025 |
| Phaisarn Ltd | Other services | 2020 |
| Pheasant Fields Holiday Lodges Limited | Hospitality | 2022 |
| Phil Brereton Consultancy Limited | Professional & scientific | 2021 |
| Phoenix Optical Glass Limited | Manufacturing | 1991 |
| Photon Labs Ltd | Information & communication | 2026 |
| Pine & Pasture Ltd | Agriculture & fishing | 2026 |