| Printson Limited | Manufacturing | 2012 |
| Printsorted Ltd | Administrative & support | 2017 |
| Priorbrand Limited | Wholesale & retail | 2023 |
| Priority Childcare Limited | Health & social care | 2009 |
| Priority Protect Limited | Administrative & support | 2019 |
| Priory Building & Construction Limited | Construction | 2006 |
| Priory Building & Engineering Ltd | Construction | 2018 |
| Priory Street Monmouth Ltd | Real estate | 2023 |
| Prisam Properties Limited | Real estate | 2000 |
| Prisan Limited | Professional & scientific | 2019 |
| Priscilla's Play Cafe Ltd | Hospitality | 2018 |
| Prism Beauty Ltd | Manufacturing | 2016 |
| Prism Independent Financial Advisers Limited | Financial services | 2000 |
| Prism Mortgage & Protection Advice Ltd | Financial services | 2023 |
| Prisma Corporation Ltd. | Professional & scientific | 2015 |
| Prismatic Environmental Limited | Professional & scientific | 2020 |
| Prismweld Nexus Limited | Information & communication | 2024 |
| Pristine Consults International Limited | Professional & scientific | 2017 |
| Pristine Polishers Mobile Services Ltd | Administrative & support | 2026 |
| Pritchard Court RTM Company Limited | Households | 2025 |
| Pritchard Rivers Developments Limited | Real estate | 2024 |
| Pritchards Embroidery Limited | Other services | 2010 |
| Private Health Consultation Ltd | Health & social care | 2018 |
| Private Hire & Taxi Cars Limited | Administrative & support | 2017 |
| Private-Berg Ltd | Wholesale & retail | 2018 |
| Privatlocker Ltd | Information & communication | 2022 |
| Privatus Secure Limited | Transport & logistics | 2021 |
| Prive Global Sports Ltd | Administrative & support | 2020 |
| Privinet Limited | Information & communication | 2020 |
| Priya Healthcare Limited | Information & communication | 2011 |
| Prize Pictures Limited | Other services | 2019 |
| Prjct One Ltd | Information & communication | 2019 |
| Prmal Ltd | Wholesale & retail | 2025 |
| Pro Actif Consulting Ltd | Professional & scientific | 2025 |
| Pro Air Deicing Limited | Administrative & support | 2019 |
| Pro Auto Wholesale Limited | Wholesale & retail | 2020 |
| Pro Build SW Ltd | Construction | 2025 |
| Pro Connect Recruits Ltd | Manufacturing | 2021 |
| Pro Event Global Solutions Limited | Hospitality | 2018 |
| Pro Finance Solutions Ltd | Financial services | 2024 |
| Pro Financial Limited | Financial services | 2018 |
| Pro Fitness Ltd | Arts & recreation | 2015 |
| Pro Generation Plans Ltd | Information & communication | 2019 |
| Pro Life Sciences Limited | Professional & scientific | 2017 |
| Pro Marquee Events Limited | Administrative & support | 2012 |
| Pro Payments Ltd | Professional & scientific | 2019 |
| Pro Practice Management Ltd | Administrative & support | 2025 |
| Pro Publico Bono Limited | Professional & scientific | 2008 |
| Pro Relocation Lets Ltd | Real estate | 2019 |
| Pro Render Facades Ltd | Construction | 2024 |
| Pro Roofing Limited | Construction | 2013 |
| Pro SD. Ltd | Transport & logistics | 2019 |
| Pro SEO Services Ltd | Professional & scientific | 2020 |
| Pro Serves International Ltd | Administrative & support | 2016 |
| Pro Services ( Midlands) Limited | Administrative & support | 2017 |
| Pro Smart Cardiff Ltd | Construction | 2024 |
| Pro Sports Consultancy Ltd | Professional & scientific | 2017 |
| Pro Tax and Accounting Ltd | Professional & scientific | 2003 |
| Pro'Spur Holdings Limited | Wholesale & retail | 2023 |
| Pro'Tech Rugby Ltd | Manufacturing | 2025 |
| PRO-18 Ltd | Arts & recreation | 2016 |
| PRO-23 Ltd | Professional & scientific | 2025 |
| PRO-3D Limited | Wholesale & retail | 2024 |
| PRO-4D Limited | Wholesale & retail | 2026 |
| Pro-Eq Ltd | Professional & scientific | 2019 |
| Pro-Gas South Wales Limited | Construction | 2015 |
| Pro-Standard Construction Ltd | Construction | 2025 |
| Pro-Tec Plus Limited | | 1988 |
| Pro-Tech Maintenance Ltd | Construction | 2019 |
| Pro-Tekt Roofing Ltd | Construction | 2018 |
| Proactive First AID Solutions Ltd | Education | 2017 |
| Proactive Physiotherapy Services Ltd | Other services | 2024 |
| Probert & Mumford Limited | Construction | 2005 |
| Probovat Limited | Information & communication | 2019 |
| Procare MSK Limited | Administrative & support | 2019 |
| Procare Nursing Agency Ltd. | Health & social care | 1997 |
| Procare Nursing Limited | Extraterritorial | 2003 |
| Procare Uniforms Ltd | Wholesale & retail | 2024 |
| Proceeding Limited | Wholesale & retail | 2023 |
| Process Engineering Consultants Ltd | Professional & scientific | 2015 |
| Processing IT Limited | Information & communication | 2014 |
| Procol UK Ltd | Extraterritorial | 2008 |
| Procured Cars Group Ltd | Information & communication | 2019 |
| Prod Abroad Ltd | Information & communication | 2022 |
| Prodem Fire & Safety Limited | Wholesale & retail | 1981 |
| Prodem Properties Limited | Real estate | 2021 |
| Prodev Ltd | Other services | 1985 |
| Prodevel Ltd | Information & communication | 2018 |
| Prodigy Avia Solutions Limited | Professional & scientific | 2014 |
| Prodikta Technologies Limited | Professional & scientific | 2018 |
| Product GUY Ltd | Professional & scientific | 2015 |
| Product Market HIT Ltd | Education | 2023 |
| Product Styling Ltd | Professional & scientific | 2019 |
| PRODUCT85 Ltd | Arts & recreation | 2024 |
| Production Safety Ltd | Professional & scientific | 2003 |
| Productive Elements Group Ltd | Arts & recreation | 2018 |
| Productivity Genius PTY Ltd | Administrative & support | 2025 |
| Products Retail Limited | Wholesale & retail | 2025 |
| Profectum Technologies Limited | Manufacturing | 2016 |
| Profectus Global Ltd | Professional & scientific | 2019 |