| Platinum Decorating & Spraying Services Ltd | Construction | 2024 |
| Platinum Luxury Transportation Ltd | Transport & logistics | 2024 |
| Platinum Property Services (Wales) Limited | Construction | 2010 |
| Platinum SW Cleaning Services Ltd | Administrative & support | 2018 |
| Platinum Total Services Ltd | Construction | 2018 |
| Platinum Van Conversions Ltd | Manufacturing | 2020 |
| Play & Bloom Ltd. | Arts & recreation | 2025 |
| Play 2 WIN Group Ltd | Wholesale & retail | 2019 |
| Play Plush Ltd | Arts & recreation | 2025 |
| Play-Ex International Limited | Administrative & support | 2015 |
| Playcraft Ltd | Manufacturing | 2017 |
| Players Containers Limited | Transport & logistics | 2024 |
| Players Estates Limited | Real estate | 2019 |
| Players Industrial Estate LLP | | 2008 |
| Playground Projects Consultancy Ltd | Professional & scientific | 2012 |
| Playjoy Ltd | Real estate | 2023 |
| Playlist and Radio Services Limited | Information & communication | 1993 |
| Plazatheme Limited | Construction | 1994 |
| Pleasant Property Management Limited | Real estate | 2018 |
| Plemont Day Ltd | Health & social care | 2021 |
| Plexus High Security Limited | Administrative & support | 2019 |
| Plnsight Ltd | Manufacturing | 2025 |
| Plough & Harrow (Swansea) Limited | Hospitality | 2017 |
| Plough Colts Football Club C.I.C. | Education | 2024 |
| PLP Systems UK Ltd | Wholesale & retail | 2021 |
| Plrigging Limited | Construction | 2012 |
| Plumb-Rite Plumbing Services Ltd | Construction | 2010 |
| Plumbtec GAS Ltd | Construction | 2013 |
| Plus Automotive Solutions and Parts Ltd | Wholesale & retail | 2020 |
| Plus PAY Limited | Wholesale & retail | 2023 |
| PLV Solutions Limited | Professional & scientific | 2024 |
| Plymouth Art Gallery Community Interest Company | Wholesale & retail | 2025 |
| PM Beverages Ltd | Professional & scientific | 2025 |
| PM Coatings & Blastings Ltd | Construction | 2023 |
| PM Commercial Property Ltd | Real estate | 2025 |
| PM Facilities Ltd | Manufacturing | 2025 |
| PM Properties and Maintenance Limited | Construction | 2022 |
| PM Staffing Ltd | Administrative & support | 2025 |
| PM7 Limited | Real estate | 2017 |
| PMA Control Limited | Professional & scientific | 2024 |
| Pmcf Propco Ltd | Financial services | 2021 |
| Pmiller Holdings Ltd | Financial services | 2025 |
| Pobbles Limited | Information & communication | 2008 |
| Pobl Bach Limited | Health & social care | 2007 |
| Pobl Bach Nurseries Limited | Health & social care | 2003 |
| Pobren Limited | Health & social care | 2019 |
| Podium Home Improvement Ltd | Manufacturing | 2020 |
| Poetry Into Light CIC | Information & communication | 2025 |
| Poiesis Developments Ltd. | Wholesale & retail | 1997 |
| Point to Point Services Limited | Health & social care | 2019 |
| Pokipulls Ltd | Wholesale & retail | 2025 |
| Polar Bear 1 Limited | Arts & recreation | 2005 |
| Polaric UK Ltd | Manufacturing | 2026 |
| Polaris Engineering Services Ltd | Construction | 2022 |
| Polaris Vehicle Solutions Limited | Construction | 2018 |
| Pole to Pole Climate Control Ltd | Energy | 2008 |
| Polebear Custom Conversion Limited | Wholesale & retail | 2019 |
| Polson Creative Limited | Professional & scientific | 2026 |
| Polson Twins Ltd | Arts & recreation | 2021 |
| Pompei Limited | Other services | 2003 |
| Poneke Ltd | Real estate | 2021 |
| Pont Steffan Ltd | Health & social care | 2023 |
| Pontardawe Apothecary Limited | Health & social care | 2022 |
| Pontardawe Enterprise Limited | Transport & logistics | 2016 |
| Pontardawe Golf Club Ltd | Arts & recreation | 2020 |
| Pontardawe Inn Limited | Hospitality | 2022 |
| Pontardawe Town Football Club Ltd | Arts & recreation | 2025 |
| Pontardawe Vape Ltd | Wholesale & retail | 2024 |
| Pontarddulais Landscaping & Building Services Ltd | Construction | 2025 |
| Pontardulais Skip Hire Limited | Water & waste | 2017 |
| Ponty Butchers 2018 Ltd | Wholesale & retail | 2018 |
| Ponty Ltd | Hospitality | 2023 |
| Pontypridd Developments SPV 1 Ltd | Construction | 2020 |
| POP UP OPS Limited | Hospitality | 2020 |
| Pope Jones Medical Company Limited | Health & social care | 2012 |
| Popeth Facilities Management & Maintenance Ltd | Professional & scientific | 2024 |
| Poplars Pontlliw Management Limited | Real estate | 2025 |
| Poppy Court Property Ltd | Real estate | 2026 |
| Port Airconditioning and Refrigeration Limited | Manufacturing | 2006 |
| Port Talbot Developments SPV 1 Ltd | Construction | 2022 |
| Port Talbot Motor Club Limited | Other services | 1980 |
| Port Talbot Urban Adventure Centre C.I.C. | Arts & recreation | 2019 |
| Port Tennant Colts Football Club Limited | Arts & recreation | 2023 |
| Port Tennant Properties Ltd | Real estate | 2002 |
| Portfolio X Ltd | Real estate | 2020 |
| Porth Design Ltd | Information & communication | 2020 |
| Porth-Y-Deri Developments Limited | Professional & scientific | 2002 |
| Porthmadog Property Investments Limited | Real estate | 1998 |
| Portside Coffee & Kitchen Limited | Hospitality | 2026 |
| Poseidon Medical Ltd | Health & social care | 2024 |
| Poseidon Swim School Ltd | Arts & recreation | 2003 |
| Posh Signs Peterborough Ltd | Manufacturing | 2013 |
| Posies Florists Limited | Wholesale & retail | 2016 |
| Positano Swansea Ltd | Hospitality | 2018 |
| Positive Action Cymru CIC | Professional & scientific | 2021 |
| Potpay Limited | Hospitality | 2008 |
| Poundpalm Limited | Arts & recreation | 1981 |
| Poverty to Purpose Christian Venture C.I.C. | Hospitality | 2011 |
| Powder Monkeez Limited | Construction | 2020 |
| Powdermill Construction Ltd | Construction | 2002 |