| Porthcawl PUB Co Limited | Hospitality | 2018 |
| Porthcwlis Limited | Construction | 2012 |
| Posh Outdoor Living Ltd | Wholesale & retail | 2025 |
| Positive Programmes C.I.C. | Education | 2022 |
| Positive Programmes Education Ltd | Education | 2022 |
| Pound Farm Limited | Agriculture & fishing | 2022 |
| Powell Commercial Property Limited | Real estate | 2018 |
| Powell Developments Ltd | Construction | 2025 |
| Powell Property Holdings Limited | Real estate | 2018 |
| Powell Residential Property Limited | Real estate | 2024 |
| Powell Student Property Limited | Real estate | 2024 |
| Power Ballad Productions Ltd | Arts & recreation | 2023 |
| PPD (Cardiff) Limited | Real estate | 2014 |
| PPD Decorating Services Ltd | Construction | 2018 |
| Ppdd Limited | Professional & scientific | 2018 |
| Prameetha Subash Limited | Construction | 2020 |
| Prbg Environmental Ltd | Construction | 2025 |
| Pre-Hospital Emergency Care Medical Ltd | Education | 2024 |
| Precision Smart Repairs Ltd | Wholesale & retail | 2020 |
| Preecision Limited | Construction | 2020 |
| Premier Land Holdings Limited | Real estate | 2026 |
| Premier Roofing and Building Group Ltd | Construction | 2024 |
| Price Cartref Residential Limited | Real estate | 2015 |
| Price Mckain Properties Ltd | Real estate | 2024 |
| Primary Plumbing & Heating Ltd | Construction | 2026 |
| Principle Lifting and Safety Limited | Construction | 2016 |
| Pro Carpentry Specialists LLP | | 2025 |
| Pro Clear Services Ltd | Water & waste | 2024 |
| Pro Health and Performance Limited | Health & social care | 2016 |
| Pro Landscaping & Construction Specialists Ltd | Construction | 2026 |
| Pro-Lec Electricians Limited | Construction | 2017 |
| Pro-Vision Landscapes Ltd | Construction | 2025 |
| PRO2GO Ltd | Construction | 2014 |
| Proact Construct Ltd | Administrative & support | 2017 |
| Probate Practitioners Services Limited | Other services | 1992 |
| Procrew Limited | Construction | 1998 |
| Professional and Support Services Limited | Education | 2003 |
| Profit Agent Limited | Other services | 2021 |
| Promark International Co., Limited | Extraterritorial | 2023 |
| Properties 23 Ltd | Real estate | 2025 |
| Property Investment Simplified Ltd | Education | 2026 |
| Propmarket Limited | Construction | 1972 |
| Protean Technical Solutions Limited | Professional & scientific | 2024 |
| PSE Services Limited | Wholesale & retail | 2021 |
| Pterete Intelligent Sanitary Ware Ltd | Wholesale & retail | 2024 |
| PUB Market Limited | Hospitality | 1987 |
| Pullman Rail Limited | Manufacturing | 1993 |
| Purevanta Facilities Limited | Administrative & support | 2026 |
| Purple Products Ltd | Wholesale & retail | 2018 |
| Purple Shoots Business Lending Limited | Financial services | 2013 |
| PVR Construction Ltd | Construction | 2010 |
| PW Transformation Limited | Transport & logistics | 2021 |
| Pwllgwanu Stores Ltd | Wholesale & retail | 2021 |
| Quantum Eng&Pm Services Ltd | Professional & scientific | 2024 |
| Quark Electronics Ltd. | Manufacturing | 2003 |
| Quarxery Ltd | Wholesale & retail | 2025 |
| Quirk IT Limited | Administrative & support | 2025 |
| Quirke & Co Hairdressers Ltd | Other services | 2023 |
| R & P Windows Limited | Manufacturing | 2002 |
| R & S Residential Limited | Real estate | 2019 |
| R and H Dixon Jones Hair Lounge Limited | Other services | 2007 |
| R J Webb Commercials Limited | Wholesale & retail | 2006 |
| R Perry Consultancy Ltd | Information & communication | 2018 |
| R&D Waste Recycling Ltd | Water & waste | 2025 |
| R&O Sims Accident Repair Centre Ltd | Wholesale & retail | 2020 |
| R&P Window Installations Limited | Construction | 2020 |
| R&S Energy Solutions Limited | Construction | 2013 |
| R-Free Limited | Professional & scientific | 2025 |
| R. H. Jeffs & Rowe Limited | Professional & scientific | 1997 |
| R2 Plumbing and Heating Ltd | Construction | 2018 |
| Radyr DC Ltd | Health & social care | 2023 |
| Rail Maintenance Services Limited | Administrative & support | 2008 |
| Railroad Engineering Ltd | Manufacturing | 2024 |
| Rainbow Creations Limited | Manufacturing | 2026 |
| Rajathurai & Sons Ltd | Wholesale & retail | 2024 |
| Rania Little Empires Ltd | Wholesale & retail | 2025 |
| Ransack Dance Company Ltd | Arts & recreation | 2019 |
| Rapid Commercial & Plant Limited | Manufacturing | 2026 |
| Raratonga Limited | Education | 2010 |
| Raven Flooring Supplies Limited | Construction | 2019 |
| RAY Digital Ltd | Information & communication | 2026 |
| RAY Lounge Ltd | Other services | 2019 |
| Raydeny Trade Corporate Limited | Wholesale & retail | 2024 |
| RCD Trans Ltd | Transport & logistics | 2018 |
| RCT Blinds Limited | Construction | 2025 |
| RCT Leisure Ltd | Hospitality | 2026 |
| RCT Property Services Ltd | Construction | 2025 |
| RDB Software Limited | Information & communication | 2007 |
| RDD Holding Ltd | Real estate | 2018 |
| RDG Transport Ltd | Transport & logistics | 2026 |
| RDM Design & Build Ltd | Construction | 2021 |
| RE & DP Groundworks Ltd | Construction | 2022 |
| Readychain Property Management Limited | Households | 1988 |
| Reazen Tech Limited | Wholesale & retail | 2023 |
| Rebecca's Mortgage & Protection Solutions Ltd | Financial services | 2025 |
| Rebisca Ltd | Real estate | 2017 |
| Red Valley Drivers Limited | Transport & logistics | 2017 |
| Redbrick Studio Castings Limited | Information & communication | 2012 |
| Reel Angling Supplies Limited | Wholesale & retail | 2017 |
| Reel Minds CIC | Education | 2022 |