| Paycraft Limited | Financial services | 2025 |
| Payne Corporations Ltd | Real estate | 2014 |
| Payra Trading Ltd | Hospitality | 2023 |
| Payroll Heaven Limited | Administrative & support | 2017 |
| PAZ Properties Limited | Real estate | 2025 |
| Pazazz Ltd | Wholesale & retail | 2025 |
| Pazco Associates Ltd | Public administration | 2023 |
| PB Fabrications Limited | Manufacturing | 2016 |
| PB Fitness Gym Ltd | Arts & recreation | 2020 |
| PB Heating & Plumbing Limited | Construction | 2015 |
| PB Property Lettings Ltd | Real estate | 2020 |
| PC Homecall Limited | Other services | 2005 |
| PC Installations Limited | Construction | 2026 |
| PC1 Limited | Information & communication | 1999 |
| PCB Global Tech Limited | Information & communication | 2020 |
| Pcbmr Ltd | Wholesale & retail | 2023 |
| PCC Engineering Limited | Professional & scientific | 2024 |
| PCL & Co Holdings Ltd | Financial services | 2020 |
| PCL Building Consultancy Ltd | Professional & scientific | 2014 |
| Pcmac Limited | Other services | 2014 |
| PCR Global Group Limited | Financial services | 2023 |
| Pcsl Solutions Limited | Information & communication | 2015 |
| Pcwm Holdings Limited | Financial services | 2024 |
| PD Property and Rental Limited | Real estate | 2018 |
| PDC Smile Ltd | Health & social care | 2024 |
| PDG UK Properties Ltd | Real estate | 2024 |
| Peace Mala | Administrative & support | 2004 |
| Peacer Ltd | Hospitality | 2018 |
| Peacock and Palm Limited | Wholesale & retail | 2026 |
| Peak Cart Ltd | Wholesale & retail | 2025 |
| Peak Composition Coaching Ltd | Other services | 2026 |
| Peakism Ltd | Professional & scientific | 2026 |
| Pear Properties Ltd | Real estate | 2023 |
| Pearl Thai Limited | Hospitality | 2023 |
| Pebbles Coaching & Well-Being Consultancy Ltd | Other services | 2017 |
| PEC Management Ltd | Financial services | 2016 |
| Pedwar Ltd | Information & communication | 2020 |
| PEE CEE Mechanical & Electrical Limited | Wholesale & retail | 1970 |
| Peerbyte Ltd | Information & communication | 2021 |
| Peerless Skinco Ltd | Wholesale & retail | 2026 |
| Pegasus Renovations Limited | Real estate | 2017 |
| Pelagonisi Limited | Financial services | 2023 |
| Pelfasged CYF | Arts & recreation | 2012 |
| Pellwood Limited | Real estate | 2010 |
| Peloton Running Community Interest Company | Arts & recreation | 2019 |
| Pelydr CYF | Health & social care | 2024 |
| Pembrey Leisure Limited | Hospitality | 2017 |
| Pembroke Building RTM Company Limited | Other services | 2005 |
| Pembrokeshire Developments SPV 1 Ltd | Construction | 2024 |
| Pembrokeshire GIN Co. Limited | Wholesale & retail | 2019 |
| Pembrokeshire Kitchens Ltd | Construction | 2018 |
| Pembrokeshire Property Maintenance Ltd | Administrative & support | 2022 |
| Pembs Clothing Limited | Wholesale & retail | 2017 |
| Pemj Consultancy Limited | Extraterritorial | 2011 |
| PEN Y CWM Properties Ltd | Real estate | 2025 |
| PEN Y Waun Farm Rare Breed Meats Ltd | Agriculture & fishing | 2024 |
| Pen-Y-Bont Court Limited | Health & social care | 2007 |
| Pen-Y-Bryn Property Management Company Limited | Real estate | 2011 |
| Pena Holdings Ltd | Financial services | 2024 |
| Penby Ltd | Information & communication | 2015 |
| Pencefnarda Farms Limited | Agriculture & fishing | 2022 |
| Penclawdd RFC Limited | Arts & recreation | 2017 |
| Pencwm CYF | Hospitality | 2018 |
| Pendine Education Ltd | Education | 2025 |
| Pendleton Financial Planning Limited | Financial services | 2022 |
| Pendleway Ltd | Hospitality | 2018 |
| Pendra AI Ltd | Information & communication | 2026 |
| Pendragon Drafting Limited | Professional & scientific | 2011 |
| Pendragon Electrical Ltd | Construction | 2022 |
| Penfro Construction Ltd | Construction | 2017 |
| Pengelli Sports and Social Club Ltd | Hospitality | 2016 |
| Penguin Culture Co. Ltd | Information & communication | 2006 |
| Penguin Facilities Management Ltd | Real estate | 2023 |
| Penguin Inns Ltd | Hospitality | 2025 |
| Penguin Recruitment Ltd | Administrative & support | 2003 |
| Peninsula Artistic Ltd | Arts & recreation | 2026 |
| Peninsula Exterior Cleaning Swansea Ltd | Administrative & support | 2024 |
| Peninsula Homes Limited | Real estate | 2025 |
| Peninsula Storage Solutions Ltd | Administrative & support | 2023 |
| Penlan Pizza Ltd | Hospitality | 2018 |
| Penllergaer Car Sales Limited | Real estate | 1999 |
| Penllergaer Estates Limited | Real estate | 1978 |
| Penllergaer M.O.T. Centre Ltd | Wholesale & retail | 2008 |
| Penllergaer Motor Company Ltd | Wholesale & retail | 2024 |
| Penllergaer Properties Ltd | Real estate | 2008 |
| Penllergare Valley Woods Trading Ltd | Arts & recreation | 2025 |
| Penman Properties Ltd. | Construction | 1998 |
| Pennant Holdings Limited | Financial services | 2022 |
| Pennard Golf Club Limited | Arts & recreation | 2026 |
| Pennod Limited | Real estate | 2004 |
| Penny Loubong Ltd | Real estate | 2023 |
| Pennywise Holdings Ltd | Financial services | 2026 |
| Pennywise Home Refurbs Ltd | Real estate | 2026 |
| Penryce Court Management Company Limited | Households | 1983 |
| Pension Administration Services Limited | Administrative & support | 2017 |
| Pentagon Design Limited | Professional & scientific | 2007 |
| Pentre 891 Ltd | Financial services | 2020 |
| Pentre Cribarth Farm Ltd | Agriculture & fishing | 2020 |
| Pentre Efail Ltd | Construction | 2020 |
| Pentre Riding & Trekking Centre Ltd | Arts & recreation | 2012 |