| Peeloff Masks Limited | Wholesale & retail | 2017 |
| Peepsa (Prevent Educate Eradicate Post Separation Abuse) Ltd | Education | 2025 |
| Pegas Cooperation Ltd | Professional & scientific | 2026 |
| Pegasus Garden Rooms Limited | Manufacturing | 2022 |
| Pegasus Maintenance Ltd | Construction | 2018 |
| Pegasus Maintenance Services Limited | Administrative & support | 2005 |
| Pegasus Media Ltd | Wholesale & retail | 2024 |
| Pegasus Project Solutions & Management Ltd | Other services | 2019 |
| Pegasus Traditional Restorations Limited | Construction | 2018 |
| Pegasus Whirlpool Baths Limited | Manufacturing | 2001 |
| Peggys Pots Limited | Arts & recreation | 2021 |
| Pegwn Finance Ltd | Financial services | 2015 |
| Peima Ltd | Hospitality | 2026 |
| Peksig Limited | Professional & scientific | 2008 |
| Pekso Ltd | Wholesale & retail | 2025 |
| Pelham Leisure Ltd | Hospitality | 2025 |
| Peli Peli Foods Ltd | Hospitality | 2019 |
| Pelican Healthcare Limited | Manufacturing | 1991 |
| Pelican Partners Film Distribution Limited | Information & communication | 2019 |
| Pellegrino Wine and Food Distribution Ltd | Wholesale & retail | 2017 |
| Pelmore Limited | Health & social care | 2006 |
| Pels Properties Limited | Real estate | 2019 |
| Pemari Consulting Limited | Information & communication | 2007 |
| Pembridge Limited | Real estate | 2018 |
| Pembroke Mews Management Limited | Households | 1987 |
| Pembrokeshire Film Development Limited | Information & communication | 2017 |
| Pembrokeshire Foods Limited | Hospitality | 1992 |
| Pembrokeshire Mortgage Centre Limited | Financial services | 2003 |
| Pembrokeshire Resource Centre Limited | Health & social care | 2003 |
| Pembury Food Manufacturing Ltd | Manufacturing | 2024 |
| PEN a Gwddf Limited | Health & social care | 2016 |
| PEN Events Ltd | Arts & recreation | 2020 |
| PEN Y FAL Chapel Management Limited | Households | 2020 |
| PEN Y Wain Property Management Ltd | Administrative & support | 2017 |
| Pen-Y-Bryn Services Limited | Construction | 2026 |
| Pen-Y-Lan Pantry Ltd | Hospitality | 2021 |
| Penallta Building Supplies Limited | Transport & logistics | 2008 |
| Penarth Autocare Ltd | Wholesale & retail | 2015 |
| Penarth Building Services Limited | Construction | 2003 |
| Penarth Commercial Properties (Holdings) Limited | Professional & scientific | 2004 |
| Penarth Commercial Properties Limited | Professional & scientific | 1960 |
| Penarth Dental Healthcare Ltd | Health & social care | 2014 |
| Penarth Gardeners Ltd | Arts & recreation | 2024 |
| Penarth Industrial Services Limited | Financial services | 1974 |
| Penarth Joinery Ltd | Construction | 2015 |
| Penarth Management Limited | Professional & scientific | 2006 |
| Penarth Property Developments Ltd | Real estate | 2022 |
| Penarth Property Maintenance Limited | Construction | 2012 |
| Penarth Road Stores Ltd | Wholesale & retail | 2025 |
| Penbrae & Co Ltd | Manufacturing | 2026 |
| Penbrae Ecopack Ltd | Manufacturing | 2026 |
| Pencisely Properties Limited | Real estate | 1988 |
| Penclawdd Shellfish Processing Co. Limited | Manufacturing | 1992 |
| Penda 1ST Limited | Transport & logistics | 2024 |
| Pendelton Ltd | Real estate | 2014 |
| Penders Spray Painting Solutions Ltd | Wholesale & retail | 2019 |
| Pendine Ltd | Real estate | 2020 |
| Pendle Schoolwear Limited | Manufacturing | 2002 |
| Pendragon Enterprises Limited | Hospitality | 2024 |
| Pendragon Peptides Ltd | Professional & scientific | 2025 |
| Pendragon Wales Limited | Wholesale & retail | 2000 |
| Pendrix Consulting Limited | Wholesale & retail | 2025 |
| Penduline Properties Limited | Real estate | 2023 |
| Penetrating Intellect Limited | Wholesale & retail | 2025 |
| Penforth Ltd | Other services | 2018 |
| Peng Global Holdings Limited | Professional & scientific | 2013 |
| Peng Real Estate (U.K.) Limited | Real estate | 2017 |
| Pengam Productions Ltd | Information & communication | 2021 |
| Pengch Limited | Wholesale & retail | 2025 |
| Pengjie Culture Media Co., Ltd | Wholesale & retail | 2025 |
| Penguin Cooling Ltd | Energy | 2024 |
| Penguin Internet Ltd | Information & communication | 2005 |
| Penguin Legal Services Limited | Professional & scientific | 2017 |
| Penguin Portals Limited | Information & communication | 2018 |
| Penguin Property Development Limited | Construction | 2018 |
| Penguin Tax Planning Limited | Professional & scientific | 2007 |
| Penguin Wealth Planners Limited | Financial services | 2018 |
| Pengwin Friends Ltd | Information & communication | 2025 |
| Pengwq Limited | Wholesale & retail | 2024 |
| Peniel Doxa Consulting UK Limited | Professional & scientific | 2019 |
| Peniel General Trading Limited | Wholesale & retail | 2023 |
| Penigamp CYF | Administrative & support | 2018 |
| Peninsula Cancer Care Limited | Health & social care | 2019 |
| Peninsula Distributors Limited | Administrative & support | 2016 |
| Penk International Service | Information & communication | 2023 |
| Penlan Construction Ltd | Construction | 2006 |
| Penman Civil Engineering Limited | Construction | 2014 |
| Penman Electrical STD Ltd | Construction | 2016 |
| Penn Pharma Group Limited | Manufacturing | 2007 |
| Penn Pharmaceutical Services Limited | Manufacturing | 1977 |
| Pennant Crescent Management Company Limited | Real estate | 2000 |
| Pennant Legal Services Ltd | Professional & scientific | 2020 |
| Pennard Investments Limited | Real estate | 2016 |
| Pennawd Cyfyngedig | Professional & scientific | 2001 |
| Pennich Limited | Wholesale & retail | 2024 |
| Pennington Place Ltd | Real estate | 2021 |
| Pennington Technical Services Limited | Professional & scientific | 2006 |
| Penningtons Professional Services Limited | Professional & scientific | 1995 |
| Pennrise Properties Limited | Real estate | 2015 |
| Penny Savers Ltd | Wholesale & retail | 2017 |