| Natural UK Ltd | Water & waste | 2003 |
| Nature Expeditions India (U.K.) Limited | Administrative & support | 1994 |
| Neil Robinson PPC Ltd | Professional & scientific | 2025 |
| NEM Estates Ltd | Real estate | 2025 |
| Neoluddite.Co.Uk Limited | Other services | 2002 |
| Nesty Web Design Ltd | Professional & scientific | 2023 |
| New Frontiers Holdings Limited | Financial services | 2025 |
| New Garnant Ltd | Wholesale & retail | 2023 |
| New Glanamman Ltd | Wholesale & retail | 2023 |
| Next-Gen Plumbing and Heating Limited | Construction | 2020 |
| Ng-Motorworx Limited | Wholesale & retail | 2022 |
| Nick Jenkins Upvc Ltd | Construction | 2023 |
| Nigel Evans Limited | Construction | 2015 |
| Niwan Limited | Real estate | 2024 |
| NJ Educational Services Limited | Education | 2014 |
| NJ Plant Hire Ltd | Administrative & support | 2024 |
| NM Holdings Ltd | Professional & scientific | 2016 |
| NON - Ferrous Alliance Limited | Other services | 2006 |
| NON Stop Trials Ltd | Wholesale & retail | 2024 |
| Normal Group Ltd | Professional & scientific | 2025 |
| NRW Healthcare International Limited | Health & social care | 2017 |
| NUK Investment Holding Company Limited | Financial services | 2022 |
| Nurturing Wild Hearts Ltd | Health & social care | 2025 |
| Oakwood Timberframe Limited | Construction | 2007 |
| Octerly Ltd | Information & communication | 2025 |
| OER Health Ltd | Other services | 2025 |
| OJR Solutions Ltd | Real estate | 2018 |
| Omaru Limited | Professional & scientific | 2003 |
| One OFF Kitchens Ltd. | Wholesale & retail | 2012 |
| One Stop Check Limited | Wholesale & retail | 2007 |
| Oneways Contractors Limited | Construction | 2026 |
| Order Uniform UK Ltd | Wholesale & retail | 2016 |
| Organised Kaos Youth Circus Ltd | Other services | 2010 |
| Orjin Foods Ltd | Hospitality | 2024 |
| Osborne Building Contractors Ltd | Construction | 2020 |
| Outlet GRP Enclosures Ltd | Manufacturing | 2026 |
| Outset Think Ltd | Construction | 2019 |
| OX Retreat Limited | Professional & scientific | 2006 |
| P & S Biggs Ltd | Manufacturing | 2013 |
| Papa's Grill (Orignal) Limited | Hospitality | 2019 |
| Paul Taylor Building Services Limited | Construction | 2010 |
| Paulcroker.Com Ltd | Information & communication | 2025 |
| PCS Motoring Group Limited | Wholesale & retail | 2021 |
| Peaky Blinds Ltd | Manufacturing | 2025 |
| Peart Assessors Limited | Health & social care | 2021 |
| Pemchurch Properties Limited | Real estate | 1956 |
| Pendragon Accounting Services Limited | Professional & scientific | 2003 |
| Penllwyn Properties Limited | Real estate | 2004 |
| Pentre TY Gwyn Service Station Limited | Wholesale & retail | 2003 |
| Penybanc RFC Limited | Arts & recreation | 2018 |
| Peoplefirsthr Limited | Information & communication | 2009 |
| Persona Partnership Limited Liability Partnership | | 2002 |
| Pet Pals R US Ltd | Agriculture & fishing | 2022 |
| Peter Gravelle Services Limited | Construction | 2009 |
| PFM Training Limited | Professional & scientific | 2013 |
| Phase Connections Limited | Construction | 2022 |
| Phillips Rental Properties Ltd | Real estate | 2019 |
| Phira-Science CIC | Professional & scientific | 2024 |
| Physiotherapy Wales Limited | Health & social care | 2007 |
| Pikes Fabrication Ltd | Professional & scientific | 2024 |
| Pikes Houses Ltd | Real estate | 2025 |
| Pillar Safety Ltd | Construction | 2025 |
| Pipeline Power Ltd | Professional & scientific | 2025 |
| Pitchfork & Provision Limited | Hospitality | 2021 |
| Pizza Point Food Ltd | Hospitality | 2024 |
| Platinum Pavers Ltd | Construction | 2025 |
| Playtime Pals Party Hire Ltd | Arts & recreation | 2024 |
| Plcm Properties Ltd | Real estate | 2024 |
| Pneumatic Solutions Ltd | Manufacturing | 2003 |
| Pontamman Property Services Limited | Financial services | 2025 |
| Pontiets Laundry Ltd | Other services | 2023 |
| Pooch Hooch UK Limited | Manufacturing | 2024 |
| Powell Property Partners Ltd | Real estate | 2024 |
| Power Project UK Limited | Administrative & support | 2023 |
| Powerzone Sustainable Energy Ltd | Administrative & support | 2023 |
| Poyer Investment Holdings Limited | Other services | 2017 |
| PR Creative Ltd | Wholesale & retail | 2020 |
| Precision Cost Consultants Ltd | Professional & scientific | 2022 |
| Premier Express Llandybie Ltd | Wholesale & retail | 2024 |
| Preseli Property Limited | Real estate | 2021 |
| Preventapest Holdings Limited | Financial services | 2024 |
| Preventapest Limited | Administrative & support | 2005 |
| Price Carpentry & Construction Ltd | Construction | 2017 |
| Primal Forest Ltd | Health & social care | 2025 |
| Prime One Consultancy Limited | Administrative & support | 2022 |
| Pro-Stone Interiors (Holdings) Limited | Financial services | 2023 |
| Pro-Stone Interiors Limited | Construction | 2005 |
| PRO7 Construction Ltd | Construction | 2026 |
| Proclimber ARB Ltd | Other services | 2019 |
| Property Plus Land Developments Ltd | Real estate | 2002 |
| Protex Restoration Limited | Administrative & support | 2019 |
| Provide Agency Ltd | Information & communication | 2026 |
| Provide Global Services Limited | Information & communication | 2026 |
| Pure Process Consultancy Ltd | Professional & scientific | 2026 |
| Purpleye Investments Ltd | Financial services | 2022 |
| PW Aviation Consulting Ltd | Wholesale & retail | 2026 |
| Pyramid Resourcing Limited | Administrative & support | 2016 |
| Quality Fuels Ltd | Mining & quarrying | 2003 |
| Quick Wills & Family Protection Ltd | Professional & scientific | 2026 |
| Quinshield Limited | Manufacturing | 1992 |