| Pass Catering Ltd | Hospitality | 2025 |
| Pathways Support Specialists Ltd | Administrative & support | 2023 |
| Patrick Partridge Photography Ltd | Professional & scientific | 2024 |
| Patworld Limited | Professional & scientific | 2018 |
| Paul Motorrepairs Ltd | Wholesale & retail | 2026 |
| Paul Weeks Plant and Demolition Services Ltd | Construction | 2025 |
| Pavia Court Limited | Households | 1996 |
| Payne Productions Ltd | Arts & recreation | 2020 |
| PC Tasty Limited | Hospitality | 2025 |
| PCR Project Solutions Limited | Professional & scientific | 2024 |
| Peak Practice Support Limited | Professional & scientific | 2019 |
| Peakluv Trading Ltd | Wholesale & retail | 2026 |
| Pearce and Chapman Ltd | Other services | 2020 |
| Pearce Family Foot Clinic Ltd | Health & social care | 2023 |
| Pearson&Broughton Ltd | Wholesale & retail | 2025 |
| Pembrokeshire DC Ltd | Health & social care | 2025 |
| Penally Paddock Management Company Ltd | Real estate | 2021 |
| Penarth Carpet & Flooring Limited | Construction | 2018 |
| Pencerrig Developments Limited | Construction | 2007 |
| Pengelli Ltd | Real estate | 2015 |
| Pennington & White GAS Engineering Services Ltd | Construction | 2025 |
| Pennington & White Motors Ltd | Wholesale & retail | 2026 |
| Penrhos Care Home Limited | Hospitality | 1985 |
| Penrhys Properties Limited | Real estate | 2002 |
| Penthouse Aesthetics Ltd | Health & social care | 2021 |
| Pentwyn Care Limited | Health & social care | 2006 |
| Pentyrch Nursery Limited | Health & social care | 2023 |
| Peppyprep Ltd | Wholesale & retail | 2022 |
| Perform IO Ltd | Information & communication | 2022 |
| Performance Physiotherapy Ltd | Health & social care | 2006 |
| Pete and Sons Limited | Administrative & support | 2025 |
| Peter Simmons Surfacing Ltd | Construction | 2014 |
| Peter Sutton on Course Ltd | Arts & recreation | 2018 |
| Peterson & Co (Wales) Limited | Professional & scientific | 2011 |
| Petwise Aquatics Limited | Wholesale & retail | 2006 |
| PGV Holdings Limited | Professional & scientific | 2021 |
| Phase Contractors DCI Ltd | Construction | 2025 |
| Phase Property Investments Ltd | Real estate | 2025 |
| PHD Building Ltd | Construction | 2015 |
| Phil Anslow Limited | Transport & logistics | 2015 |
| Phillips Property Management (South Wales) Limited | Construction | 2012 |
| Phoenix Decoration Academy Limited | Construction | 2025 |
| Phoenix Decorators Limited | Construction | 2024 |
| Phoenix Fitness Gym Ltd | Education | 2023 |
| Phone Doctor Pontypridd Ltd | Other services | 2023 |
| Phub Ltd | Construction | 2025 |
| Pica Property Limited | Real estate | 2022 |
| Pico Shop Ltd | Wholesale & retail | 2026 |
| Picton Minibus & Taxi Transport Limited | Transport & logistics | 2019 |
| Picton-Jones IFA Ltd | Professional & scientific | 2021 |
| Pietras Services Ltd | Professional & scientific | 2026 |
| Pinebeam (Wales) Limited | Extraterritorial | 2000 |
| Pinebeam Ltd | Construction | 1994 |
| Pinetree Aviation Ltd | Manufacturing | 2026 |
| Pink Nail 20 Ltd | Other services | 2026 |
| Pinkspiration C.I.C. | Construction | 2009 |
| PIT Stop Service Centre Ltd | Wholesale & retail | 2015 |
| PJJ Property Ltd | Real estate | 2023 |
| PK Drylining Ltd | Construction | 2023 |
| Place Hapus Limited | Health & social care | 2022 |
| Plantara Ltd | Agriculture & fishing | 2025 |
| PLATFORM11 Pontypridd Ltd | Wholesale & retail | 2019 |
| Platinum Darts Limited | Wholesale & retail | 2025 |
| Pleasant View Homes Limited | Real estate | 2026 |
| Plectra Ltd | Information & communication | 2023 |
| PMC Engineering Limited | Professional & scientific | 1995 |
| PMC Specialist Maintenance Ltd | Professional & scientific | 2024 |
| PMW Specialist Services Ltd | Professional & scientific | 2017 |
| PNP POD Ltd | Manufacturing | 2026 |
| Polka DOT Consulting Limited | Information & communication | 2017 |
| Polski Sklep Pontypridd Ltd | Wholesale & retail | 2026 |
| PONDS4U Ltd | Administrative & support | 2018 |
| Ponty Foods Centre Ltd | Hospitality | 2025 |
| Ponty Pizza BOY Ltd | Hospitality | 2025 |
| Ponty Post Stores Limited | Wholesale & retail | 2023 |
| Ponty Rugby Limited | Arts & recreation | 2003 |
| Pontydysgu Limited | Education | 1999 |
| Pontypridd Arts Ltd | Wholesale & retail | 2025 |
| Pontypridd Auctions Limited | Professional & scientific | 2002 |
| Pontypridd Car Wash Ltd | Wholesale & retail | 2025 |
| Pontypridd Carpets Limited | Wholesale & retail | 2023 |
| Pontypridd Ceilings Ltd | Construction | 2024 |
| Pontypridd Children's Contact Centre Limited | Health & social care | 2009 |
| Pontypridd Chiropractic Ltd | Other services | 2013 |
| Pontypridd Damproofing Limited | Construction | 2009 |
| Pontypridd Funeral Services Limited | Other services | 2015 |
| Pontypridd Golf Club House Limited(The) | Arts & recreation | 1926 |
| Pontypridd Markets Fairs and Town Hall Company Limited | Construction | 1985 |
| Pontypridd Masonic Hall Company Limited | Other services | 1885 |
| Pontypridd MOT Centre Ltd | Professional & scientific | 2023 |
| Pontypridd Osteopathic Clinic Limited | Other services | 2003 |
| Pontypridd Plastics Supplies Limited | Wholesale & retail | 2022 |
| Pontypridd Plumbing and Home Improvements Ltd | Construction | 2025 |
| Pontypridd Print Solutions Limited | Manufacturing | 2019 |
| Pontypridd Renovations Ltd | Real estate | 2005 |
| Pontypridd Stores Limited | Wholesale & retail | 2020 |
| Pontypridd Van Hire Limited | Administrative & support | 2025 |
| Pontypridd Young Men's Christian Association | Other services | 2011 |
| POP N Pour Ltd | Hospitality | 2024 |
| Porth Plumbing & Heating Limited | Construction | 2003 |