| Prism Trade Ltd | Wholesale & retail | 2024 |
| Prisma IT Solutions Ltd | Information & communication | 2026 |
| Prisma Systems Limited | Wholesale & retail | 2024 |
| Pritpal Dhillon Limited | Transport & logistics | 2015 |
| Private English Class Ltd | Education | 2011 |
| Prizolla PVT Ltd | Health & social care | 2020 |
| Pro Advice Financial Services Limited | Financial services | 2010 |
| Pro Builders Team Limited | Construction | 2018 |
| Pro Gym Supplements Ltd | Wholesale & retail | 2022 |
| Pro Modifications Ltd | Other services | 2024 |
| Pro Motor Service Limited | Wholesale & retail | 2024 |
| Pro Padel Limited | Administrative & support | 2024 |
| Pro SE Solutions Limited | Professional & scientific | 2025 |
| Pro Tax Plus Leyton Ltd | Professional & scientific | 2023 |
| Procapital Partners Ltd | Professional & scientific | 2013 |
| Proclean Professional Ltd | Administrative & support | 2025 |
| PROCLEAN24 Ltd | Administrative & support | 2024 |
| Procure PPM Ltd | Professional & scientific | 2021 |
| Professional Asset Finance Limited | Professional & scientific | 2003 |
| Professional Care Service Company Limited | Administrative & support | 2025 |
| Professionlx Ltd | Professional & scientific | 2021 |
| Profily Limited | Information & communication | 2026 |
| Profinish Interior Solusions Ltd. | Construction | 2021 |
| Progress Motor Group Limited | Wholesale & retail | 2020 |
| Progression Events Limited | Professional & scientific | 2020 |
| Progrowth Accounting Limited | Professional & scientific | 2024 |
| Proheat Contracts Limited | Construction | 2018 |
| Prohr Solutions Ltd | Professional & scientific | 2024 |
| Project & Procurement Consultancy Ltd | Professional & scientific | 2013 |
| Project 21/11 Limited | Real estate | 2013 |
| Project Jupiter Limited | Administrative & support | 2016 |
| Project Management Inc Ltd | Professional & scientific | 2015 |
| Projectlead Global Ltd | Professional & scientific | 2025 |
| Prolixus Capital One Ltd | Professional & scientific | 2023 |
| Promenade Services Ltd | Hospitality | 2022 |
| Promptus Limited | Professional & scientific | 2019 |
| Pronixnova UK Ltd | Administrative & support | 2020 |
| Pronto Investments Ltd | Extraterritorial | 2021 |
| Property and Building Ltd | Information & communication | 2023 |
| Property With Paige Ltd | Real estate | 2026 |
| Prosaw Holdings Limited | Financial services | 2021 |
| Prospect Brigstock Consultancy Limited | Professional & scientific | 2020 |
| Prospect Brigstock Developments Limited | Hospitality | 2008 |
| Prospect Brigstock Ltd | Administrative & support | 2008 |
| Prospect Brigstock Services Limited | Professional & scientific | 2018 |
| Prosper Housing Services Ltd | Hospitality | 2017 |
| Prosperitas Investment Group Ltd | Professional & scientific | 2023 |
| Prosports Brand Ltd | Administrative & support | 2021 |
| Protap Traditional Ltd | Hospitality | 2019 |
| Provident Homes Ltd | Real estate | 2018 |
| Provident Homes Rushton Road Ltd | Construction | 2020 |
| PSALM23 Care Services Ltd | Health & social care | 2022 |
| PSB Carpets & Flooring Ltd | Construction | 2021 |
| PSG Care Limited | Health & social care | 2025 |
| PSG Properties Limited | Real estate | 2015 |
| Psmeintjes Consulting Limited | Information & communication | 2013 |
| Psychology Keys Ltd | Health & social care | 2020 |
| Ptsl Ltd | Wholesale & retail | 2022 |
| Pualugu Limited | Transport & logistics | 2024 |
| Pudding Digital Ltd | Information & communication | 2025 |
| Punni Investment Limited | Real estate | 2025 |
| Purbeck Consultancy Services Limited | Professional & scientific | 2019 |
| Pure Hawa Limited | Manufacturing | 2025 |
| Purewal Waste Collection Ltd | Water & waste | 2017 |
| Purley Green Ltd | Health & social care | 2021 |
| Purley Ltd | Health & social care | 2014 |
| Purple Box Land and Commercial Sourcing Ltd | Professional & scientific | 2018 |
| Purple HAT Care Services Limited | Health & social care | 2025 |
| Purple HAT Limited | Administrative & support | 2024 |
| Purpose Elevated Ltd | Professional & scientific | 2025 |
| Purrchester Ltd | Professional & scientific | 2025 |
| Push Global Ltd | Administrative & support | 2014 |
| PV Removals Ltd | Transport & logistics | 2026 |
| PVA Transport Ltd | Transport & logistics | 2023 |
| PWM Training (London) Limited | Information & communication | 2012 |
| PWM Training (Midlands) Limited | Information & communication | 2012 |
| PWM Training (UK) Limited | Information & communication | 2012 |
| PWM Training (Wales & West) Limited | Information & communication | 2012 |
| Pytchley Allotments & Small Holdings Association Limited | Real estate | 1941 |
| Pytchley Farming Company Limited | Financial services | 2004 |
| Pytchley Farms Limited | Agriculture & fishing | 1960 |
| Pytchley House Estate Limited | Professional & scientific | 1973 |
| Pytchley House Limited | Households | 2019 |
| Pytchley Renewables Limited | Energy | 2015 |
| Q Hair Salon Limited | Other services | 2015 |
| Q-Nar Limited | Real estate | 2021 |
| Qaila Medicals Limited | Health & social care | 2025 |
| QAM Services Ltd | Other services | 2021 |
| QBF Limited | Wholesale & retail | 2018 |
| QDY Ltd | Construction | 2024 |
| QI (CF) Limited | Professional & scientific | 2023 |
| Qoob Limited | Professional & scientific | 2021 |
| Quality and Innovation Trading Limited | Wholesale & retail | 2020 |
| Quality Food 4 YOU Ltd | Wholesale & retail | 2019 |
| Quality Plus Services Ltd | Professional & scientific | 2018 |
| Quantum Property Lettings Ltd | Real estate | 2020 |
| Quarteryard Limited | Real estate | 2025 |
| Quartz Distribution Limited | Professional & scientific | 2004 |
| Quattro Pillars Ltd | Real estate | 2025 |
| Queensberry Dental Laboratory Limited | Health & social care | 2013 |