| Plumbing Heating GAS Solar Limited | Construction | 2018 |
| Plumblec UK Ltd | Construction | 2017 |
| Plume School | Education | 2011 |
| Plume Trading Limited | Education | 2012 |
| Plush Clubb Limited | Wholesale & retail | 2024 |
| Plyo UK Limited | Construction | 2026 |
| PM Investigations Limited | Administrative & support | 2014 |
| PMC Cars Limited | Wholesale & retail | 2022 |
| PMD Financial Planning Ltd | Professional & scientific | 2019 |
| Pmel Holdings Limited | Financial services | 2021 |
| PMS Norwich Limited | Other services | 2025 |
| Pocknells Accountants Limited | Professional & scientific | 2026 |
| Pocknells Advisory Limited | Professional & scientific | 2026 |
| Pocknells Holdings Limited | Financial services | 2023 |
| Pocknells Wealth Management Limited | Financial services | 2023 |
| Podium Search Limited | Professional & scientific | 2025 |
| Point Graphics Limited | Manufacturing | 2005 |
| Pointer Agencies Limited | Professional & scientific | 2009 |
| Pointlink Limited | Financial services | 2006 |
| POINTS4PLANET Ltd | Energy | 2014 |
| Polar Brite Limited | Other services | 2010 |
| Polarcool Refrigeration Limited | Manufacturing | 1997 |
| Polaris Co. Ltd | Professional & scientific | 2024 |
| Polzeath Group Holdings Limited | Financial services | 2022 |
| Polzeath Property Limited | Financial services | 2022 |
| Pomodoro Italian Ltd | Hospitality | 2025 |
| PON Bars Ltd | Hospitality | 2025 |
| Poolman Leisure Group Ltd | Administrative & support | 2009 |
| Popden Ltd | Construction | 2017 |
| Popper and Carter Limited | Construction | 2009 |
| Port Express (UK) Limited | Transport & logistics | 2007 |
| Portfolio Management Limited | Real estate | 2023 |
| Portlist Ltd | Real estate | 2019 |
| Poscog Group Limited | Information & communication | 2020 |
| Poseidon Cleaning Services Ltd | Construction | 2021 |
| Posture Partnership Limited | Health & social care | 2025 |
| Potter & Whitrow Developments Ltd | Real estate | 2021 |
| Potters Forge (Holdings) Limited | Real estate | 2023 |
| Potters Forge Ltd | Construction | 2013 |
| Potters Paint Repairs Limited | Wholesale & retail | 2017 |
| Poulson Creative Limited | Wholesale & retail | 2018 |
| Poulton Portables Limited | Manufacturing | 2002 |
| Power Cheer Limited | Arts & recreation | 2019 |
| Power Dance Essex Ltd | Education | 2025 |
| Power Forwarding Ltd | Transport & logistics | 2013 |
| Power Sprouts Ltd | Education | 2025 |
| Powerlite Products Limited | Wholesale & retail | 2003 |
| PPC Live UK CIC | Education | 2023 |
| PPP Security Specialist Ltd | Financial services | 2022 |
| PRC Disposables Limited | Wholesale & retail | 2009 |
| Precision Fitness Coaching Ltd | Arts & recreation | 2026 |
| Premier Building Services Company Limited | Construction | 1996 |
| Premier Consultancy Construction Limited | Construction | 2008 |
| Premier Fleet Installations Limited | Wholesale & retail | 2016 |
| Premier Parks Services Limited | Administrative & support | 2007 |
| Premier Piling and Foundations Limited | Construction | 2003 |
| Premier Piling Holdings Limited | Administrative & support | 2009 |
| Premier Sports Surfaces Ltd | Construction | 1992 |
| Prestige Homecare 24/7 Ltd | Health & social care | 2021 |
| Prestige Nationwide Limited | Real estate | 2017 |
| Prestige Payroll & Bookkeeping Services Ltd | Professional & scientific | 2021 |
| Prestige Vehicle Repairs Limited | Wholesale & retail | 2011 |
| Pretty Bean Coffee Co Ltd | Hospitality | 2020 |
| Prfi Limited | Professional & scientific | 2015 |
| PRG Advice Limited | Professional & scientific | 2025 |
| Primal Group Holdings Limited | Financial services | 2025 |
| Primary Asset Finance Limited | Financial services | 2017 |
| Primary Business Finance Limited | Financial services | 2017 |
| Primary Corporate Finance Limited | Financial services | 2017 |
| Primary Sports Group Ltd | Education | 2023 |
| Prime Reach Advertising Limited | Professional & scientific | 2026 |
| Prince Medical Ltd | Other services | 2024 |
| Priority Legal Limited | Professional & scientific | 2008 |
| Priors Pest Control Ltd | Health & social care | 2024 |
| Prizes in Motion Ltd | Wholesale & retail | 2024 |
| Pro Plastering Essex Limited | Construction | 2024 |
| Pro Trading Rada Ltd | Education | 2022 |
| Pro-Right Plumbing and Heating Limited | Construction | 2021 |
| Process Line Ltd | Professional & scientific | 2020 |
| Professional Cleaning Solutions Limited | Administrative & support | 2025 |
| Professional Medcare Services Ltd | Other services | 2024 |
| Professional Medcare Solutions Ltd. | Other services | 2023 |
| Progressive Living Limited | Wholesale & retail | 2007 |
| Project Consulting & Construction Limited | Construction | 2004 |
| Project Plan Agency Limited | Administrative & support | 2025 |
| Proper EGG and Beans Limited | Hospitality | 2019 |
| Propiteer Capital Solutions Limited | Real estate | 2018 |
| Propiteer CS Limited | Real estate | 2019 |
| Propiteer Hotel Development NO.2 Limited | Real estate | 2018 |
| Propiteer Hotels Duxford Limited | Hospitality | 2018 |
| Propiteer Hotels Portfolio Limited | Hospitality | 2019 |
| Propiteer Park Lane Limited | Construction | 2018 |
| Propursuit Careers Limited | Administrative & support | 2025 |
| Providence Garage (H Camp & SON 1946) Limited | Wholesale & retail | 2008 |
| PSC Contracts Limited | Construction | 2006 |
| Psychology Outside the Box Ltd | Health & social care | 2023 |
| Ptfe Midco Limited | Financial services | 2023 |
| Ptlt Ltd | Real estate | 2023 |
| Pump IT Consultancy Ltd | Administrative & support | 2023 |
| Purleigh Wash Farm Limited | Agriculture & fishing | 2025 |