| Pickford’S Hospitality Penarth Ltd | Hospitality | 2022 |
| Piece of Cardboard Productions Limited | Arts & recreation | 2013 |
| Pink Floyd Bar Ltd | Hospitality | 2017 |
| Pink PIG Loans Limited | Financial services | 2006 |
| Pink Rose BUD Limited | Administrative & support | 2011 |
| Pipa Consulting Ltd | Information & communication | 2011 |
| Pivotal CFO Limited | Professional & scientific | 2025 |
| PJS Construct Ltd | Construction | 2022 |
| PJT Media Limited | Information & communication | 2021 |
| Plas ST POL DE Leon (Penarth) Limited | Households | 2006 |
| Play With Purpose Ltd | Professional & scientific | 2023 |
| Plugjam Ltd | Arts & recreation | 2024 |
| Pocket Publications Cardiff LLP | | 2008 |
| Pogchampcapital Ltd | Education | 2022 |
| Point Made Agency Ltd | Information & communication | 2024 |
| Poplars Pontlliw Limited | Construction | 2020 |
| Porter House Limited | Professional & scientific | 2019 |
| Portland Place (Penarth) Management Limited | Administrative & support | 2001 |
| Pppphysio Ltd | Health & social care | 2018 |
| Premier Pest Management Ltd | Professional & scientific | 2017 |
| Premier Staffing Solutions Ltd | Education | 2020 |
| Pricedown Store Ltd | Wholesale & retail | 2006 |
| Pride in Your Car Limited | Manufacturing | 2001 |
| Prime Hair & Beauty Limited | Wholesale & retail | 2026 |
| Principality Property Transfer Services Limited | Professional & scientific | 1983 |
| Principle Force Consulting Services Ltd | Professional & scientific | 2009 |
| Printmet Limited | Manufacturing | 1960 |
| Prism Technology Wales Ltd | Information & communication | 2009 |
| Pro-Delta MGT Consulting Ltd | Extraterritorial | 2024 |
| Profile Woodwork Ltd | Construction | 2018 |
| Project Solutions 98 Limited | Wholesale & retail | 2021 |
| Projects Aligned Limited | Professional & scientific | 2013 |
| Propco Developments Limited | Real estate | 2003 |
| Proper Red Props Limited | Administrative & support | 2015 |
| Properties Unlocked Ltd | Real estate | 2022 |
| Property Investment Futures Limited | Administrative & support | 2009 |
| Property Presentation & Maintenance Limited | Construction | 2013 |
| Propstuff Ltd | Information & communication | 2013 |
| Proud Home Renovations Ltd | Construction | 2022 |
| PRS Property Ltd | Real estate | 2022 |
| PSC Acquisitions Ltd | Real estate | 2024 |
| Psych Pree Ltd | Health & social care | 2022 |
| PT Building & Property Ltd | Construction | 2018 |
| Pura Vida Boardriders Ltd | Wholesale & retail | 2010 |
| Purpose Chiropractic Ltd | Health & social care | 2019 |
| Qualia Law CIC | Information & communication | 2021 |
| Quantt CYF. | Construction | 2025 |
| Quantum Earth Ltd | Information & communication | 2025 |
| Quoraishi Limited | Real estate | 2015 |
| Quorum Project Management Limited | Professional & scientific | 1999 |
| R & P Truck Cleaning Limited | Transport & logistics | 2017 |
| R B Fixing Limited | Professional & scientific | 2013 |
| R One Investment Limited | Real estate | 2016 |
| R W Mott & Partner Limited | Financial services | 2013 |
| R-Ox International Ltd | Wholesale & retail | 2023 |
| Rabaiotti Business Services Limited | Professional & scientific | 2020 |
| Rabaiotti Group Limited | Extraterritorial | 2010 |
| Rabaiotti Professional Services Limited | Professional & scientific | 2021 |
| Rachael Thomas Mortgages Limited | Financial services | 2026 |
| Radhe Shyam Properties Limited | Real estate | 2024 |
| Ragado Ltd | Wholesale & retail | 2024 |
| Rainhill Heritage Limited | Extraterritorial | 2005 |
| Raise Collective Limited | Other services | 2025 |
| Razor Rentals Ltd | Real estate | 2025 |
| RB Consultancy & Services Ltd | Professional & scientific | 2024 |
| RC Property Investments Limited | Construction | 2020 |
| RE Project Consultant Limited | Construction | 2024 |
| Re-Cognition Training CIC | Administrative & support | 2019 |
| Reachal Ltd | Information & communication | 2013 |
| Real Property NFT Limited | Information & communication | 2024 |
| Real World Insights Ltd | Information & communication | 2015 |
| Realtech Aviation Services Ltd | Professional & scientific | 2024 |
| Rebecca Oakley Limited | Professional & scientific | 2012 |
| Recordimage Limited | Construction | 1990 |
| Recycled Solutions Limited | Construction | 2016 |
| Red Pine Box Ltd | Arts & recreation | 2011 |
| Red Sky Resourcing Ltd | Administrative & support | 2024 |
| Redimo Ltd | Transport & logistics | 2026 |
| Redlands Associates Limited | Professional & scientific | 2021 |
| Redlands Store Ltd | Wholesale & retail | 2019 |
| Rednology UK Ltd | Wholesale & retail | 2024 |
| Redrink Ltd | Administrative & support | 2020 |
| Redrup Motors Limited | Real estate | 2001 |
| Reel Cinema Experience Limited | Hospitality | 2023 |
| Rees IT Services Limited | Administrative & support | 2015 |
| Reflective Source Translations Ltd | Professional & scientific | 2009 |
| Refresh Juice Bar Limited | Wholesale & retail | 2025 |
| Regattas Asia Ltd. | Arts & recreation | 2017 |
| Regentsway Limited | Real estate | 1997 |
| Rejuvenate Cardiff Limited | Other services | 2025 |
| Rejuvenate Developments Group Limited | Construction | 2025 |
| Rejuvenate Groundworks Development Group Limited | Construction | 2025 |
| Rejuvenate Skin Experts Training Academy Ltd | Other services | 2026 |
| Relish Property Development Ltd | Construction | 2025 |
| Remarkable Events LLP | | 2017 |
| Rena Limited | Professional & scientific | 2019 |
| Renovate Penarth Limited | Construction | 2021 |
| Resabe Ltd | Information & communication | 2023 |
| Ressj Ltd | Health & social care | 2022 |
| Rest Space Floatation Rooms Ltd | Other services | 2024 |