| Piccoline Parenting Education Ltd | Health & social care | 2023 |
| Piccolo Bar Ltd | Hospitality | 2016 |
| Pick Hicks Property Ltd | Real estate | 2025 |
| Pickering Architectural Joinery Limited | Manufacturing | 2024 |
| Picket Fences Properties Ltd | Real estate | 2025 |
| Picton Arcade (Swansea) Limited | Real estate | 1982 |
| Pictons Hotel and Restaurant Ltd | Hospitality | 2023 |
| Picture a Gift Ltd | Wholesale & retail | 2023 |
| PIDGE88VINTAGE Ltd | Wholesale & retail | 2025 |
| Pier Hill Properties Limited | Real estate | 1986 |
| Pierre Blanche Ltd | Real estate | 2018 |
| Pigsty Property Ltd | Real estate | 2021 |
| Pilates Swansea Limited | Other services | 2015 |
| Pilipala Farm Limited | Agriculture & fishing | 2021 |
| Pillbox Media Limited | Information & communication | 2022 |
| Pilot Wharf Limited | Manufacturing | 2017 |
| Pine Point Ltd | Health & social care | 2022 |
| Pine Tree Court Management Limited | Households | 1986 |
| Pines Country Club (Swansea) Limited(The) | Real estate | 1960 |
| Pinetree Car Superstore Ltd | Wholesale & retail | 2002 |
| Pinetree Cars Limited | Other services | 2000 |
| Pink and Blue Hair Salon Ltd | Other services | 2024 |
| Pink Cat Shop Ltd | Extraterritorial | 2003 |
| Pink Cleaning Swansea Ltd | Administrative & support | 2012 |
| Pink Flamingo Events Swansea Ltd | Arts & recreation | 2023 |
| Pink Ribbons Entertainment Limited | Arts & recreation | 2021 |
| Pink Soup Investments Ltd | Financial services | 2025 |
| Pinkgold Ltd | Professional & scientific | 2022 |
| Pinkwaveuk Limited | Wholesale & retail | 2025 |
| Pinn Services Limited | Information & communication | 1997 |
| Pinnacle RTK Limited | Professional & scientific | 2005 |
| Pinnacle Services Group Ltd | Health & social care | 2022 |
| Pinpoint Manufacturing Limited | Manufacturing | 2009 |
| Pinto Foods Ltd | Hospitality | 2015 |
| Pinwin Ltd | Wholesale & retail | 2023 |
| Pioneer Electrical Installations Limited | Construction | 2008 |
| Pioneers Consultancy Group Limited | Information & communication | 2024 |
| Pis-Mar Limited | Transport & logistics | 2019 |
| Pitch Entertainment Limited | Wholesale & retail | 2019 |
| Pitney Fabrication Company Limited | Construction | 1992 |
| Pitsworthy Property Limited | Real estate | 2024 |
| Pitter Patter Day Nursery Limited | Administrative & support | 2003 |
| Pitton Cross Farm Ltd | Hospitality | 2021 |
| Pittsburgh (Holdings) Limited | Real estate | 2001 |
| Pivot 21 Limited | Professional & scientific | 2015 |
| Pixel & PEN Studios Limited | Information & communication | 2025 |
| Pixel PAD Limited | Real estate | 2025 |
| Pixel Property Limited | Real estate | 2021 |
| Pixelore Ltd | Health & social care | 2025 |
| Pixie Cakes Ltd | Hospitality | 2025 |
| Pixie Creative Limited | Information & communication | 2024 |
| Pixiefoto Ltd | Professional & scientific | 2023 |
| Pizza Antonio Ltd | Hospitality | 2019 |
| Pizza Malak Ltd | Hospitality | 2023 |
| Pizza Napoli (JA) Ltd | Hospitality | 2019 |
| Pizza Napoli (RBJ) Limited | Hospitality | 2020 |
| Pizza P Limited | Hospitality | 2026 |
| Pizza PAN Limited | Hospitality | 2025 |
| Pizza Planet (Kingsbridge) Ltd | Hospitality | 2017 |
| Pizza Pompeii (Gorseinon) Limited | Hospitality | 2021 |
| Pizza Venice (Swansea) Limited | Hospitality | 2021 |
| Pizza Venice 2024 Ltd | Hospitality | 2024 |
| Pizza Venice SA1 Limited | Hospitality | 2026 |
| Pizzaboyz to Go Ltd | Hospitality | 2022 |
| PJ & P Williams Properties Ltd | Real estate | 2022 |
| PJ Day Coffee Co Limited | Hospitality | 2020 |
| PJ Stays Ltd | Real estate | 2025 |
| PJD Media Ltd | Professional & scientific | 2026 |
| PJD Pro Ltd | Information & communication | 2022 |
| PJG Recovery Limited | Financial services | 2012 |
| Pjme Holdings Ltd | Financial services | 2024 |
| PJN Mentoring and Interventions Limited | Other services | 2017 |
| PKJ Consulting Ltd | Professional & scientific | 2019 |
| Place Change Ltd | Construction | 2019 |
| Place Estates Ltd | Real estate | 2025 |
| Place of Victory Limited | Other services | 2010 |
| Placetown Property Management Limited | Real estate | 1991 |
| Plan a Glazing & Construction Services Limited | Construction | 2018 |
| Plane Music Limited | Information & communication | 1978 |
| Plane Trading Limited | Wholesale & retail | 2024 |
| Planet 3 Wealth Limited | Financial services | 2015 |
| Planet Earth Properties Ltd | Real estate | 2020 |
| Planet Sounds (UK) Limited | Arts & recreation | 2006 |
| Planetart Ltd | Manufacturing | 2012 |
| Planeweighs Limited | Manufacturing | 1977 |
| Planning Your Future Ltd | Professional & scientific | 2019 |
| Plant Ecology Beyond Land (Pebl) CIC | Agriculture & fishing | 2019 |
| Plant Repair Direct Limited | Manufacturing | 2025 |
| Plant TEC Services Limited | Manufacturing | 2004 |
| Plants and Papers Ltd | Wholesale & retail | 2021 |
| Plas Newydd Care Limited | Health & social care | 2002 |
| Plastic Advertising Ltd | Professional & scientific | 2016 |
| Platcon Limited | Professional & scientific | 2010 |
| Plate Mania Limited | Wholesale & retail | 2020 |
| Platfform Consulting Ltd | Education | 2026 |
| Platfform for Change | Health & social care | 1990 |
| Platinau Ltd | Real estate | 2021 |
| Platinum Audiology Ltd | Professional & scientific | 2019 |
| Platinum Bricklaying Limited | Construction | 2022 |
| Platinum Controls Installations Limited | Administrative & support | 2008 |