| Praman Ltd | Real estate | 2023 |
| Pramint Limited | Real estate | 2019 |
| Praxis Professional Services Ltd | Professional & scientific | 2014 |
| Precious 4 Pearls Ltd | Health & social care | 2022 |
| Precision Plumbing and Heating Services Ltd | Construction | 2018 |
| Prem Kumar Keshri Limited | Health & social care | 2023 |
| Premier Fish at Home Limited | Wholesale & retail | 2021 |
| Premier Fish Limited | Administrative & support | 2000 |
| Premier OFF License Limited | Wholesale & retail | 2008 |
| Premier Pitches Limited | Administrative & support | 1997 |
| Premier Seeds Investment Company Limited | Financial services | 2023 |
| Presentation Online Ltd | Education | 2012 |
| Prestige Aesthetics (Salisbury) Ltd | Health & social care | 2022 |
| Prestige Payroll Limited | Administrative & support | 2011 |
| Prestige Personal Training & Nutrition Ltd | Education | 2020 |
| Prestwick Property Services Ltd | Real estate | 2024 |
| Pretty Kitty Fashion Ltd | Wholesale & retail | 2016 |
| Pride Garage Doors Limited | Construction | 2017 |
| Priest Hill Heights (Epsom) Management Company Limited | Households | 2015 |
| Primary Tutor Online Ltd | Education | 2024 |
| Prime Care Associates Ltd | Health & social care | 2026 |
| Prime Music Publishing Limited | Information & communication | 2014 |
| Prime Promotions Limited | Wholesale & retail | 2024 |
| Primed Invest Ltd | Real estate | 2024 |
| Primenode Ltd | Information & communication | 2025 |
| Prince of Wales Mansions (Harrogate) Limited(The) | Hospitality | 1959 |
| Principal System Solutions Ltd | Information & communication | 2003 |
| Prior Park Property Ltd | Households | 2018 |
| Priory Beau Limited | Wholesale & retail | 2021 |
| Priory Lodge (Salisbury) Limited | Households | 1983 |
| Priory Walk Management Company Limited | Households | 2011 |
| Pristine Pressure Washing Limited | Administrative & support | 2015 |
| Pritchetts Limited | Wholesale & retail | 2002 |
| Pritchetts Property Limited | Real estate | 2022 |
| Private Pain Limited | Professional & scientific | 2024 |
| Private Secretarial Services Ltd | Administrative & support | 2020 |
| Pro Finish Fiberglass Weymouth Ltd | Construction | 2026 |
| Pro-Dec Decorating South Limited | Construction | 2012 |
| Pro-Fire (UK) Ltd | Administrative & support | 2002 |
| Pro-Insulate & Loft Boarding Ltd | Construction | 2023 |
| Processcrunch Limited | Professional & scientific | 2021 |
| Proconcord Limited | Administrative & support | 2017 |
| Prodan Hospitality Limited | Hospitality | 2025 |
| Professional Pensions and Investments Limited | Financial services | 2001 |
| Project 1000 Ltd | Professional & scientific | 2019 |
| Project London Limited | Construction | 2013 |
| Project Manna CIC | Agriculture & fishing | 2019 |
| Project Naturebound CIC | Wholesale & retail | 2025 |
| Promec Group Ltd | Construction | 2025 |
| Propel Collective Ltd | Professional & scientific | 2020 |
| Propeller-Tech Ltd | Professional & scientific | 2020 |
| Property Development (Wilts) Ltd | Construction | 2004 |
| Property Management Services UK Limited | Real estate | 2002 |
| Propliner Magazine (1985) Limited | Information & communication | 1984 |
| Propower Systems Limited | Information & communication | 1994 |
| Proreach Ltd | Information & communication | 2019 |
| Prosport Performance Limited | Wholesale & retail | 2012 |
| Proteome Limited | Professional & scientific | 2017 |
| Protome Scientifica Limited | Professional & scientific | 2018 |
| Providers of Integrated Medicine in Sarum Limited | Health & social care | 2015 |
| Provigilance Limited | Administrative & support | 2006 |
| Proxigean Ltd | Administrative & support | 2018 |
| Prune N Kutt Ltd | Administrative & support | 2017 |
| PSMITH64.COM Limited | Professional & scientific | 2026 |
| PSR Bromley Limited | Wholesale & retail | 1993 |
| PSR Contracts Limited | Wholesale & retail | 2009 |
| Psyched Ltd | Health & social care | 2011 |
| PT Realisations 2020 Limited | Administrative & support | 1989 |
| PT2 Realisations 2020 Limited | Administrative & support | 2016 |
| PUB Door Company (Security) Ltd | Administrative & support | 2015 |
| PUB Heritage Limited | Hospitality | 2015 |
| PUB Tokens Limited | Administrative & support | 1997 |
| Publishing LAB Ltd | Information & communication | 2025 |
| Puddleducks Early Years Ltd | Education | 2021 |
| Puff of Logic Ltd | Information & communication | 2025 |
| Puffinxpress Limited | Wholesale & retail | 2025 |
| Pugland Limited | Professional & scientific | 2015 |
| Pugtech Racing Ltd. | Wholesale & retail | 2015 |
| Pulcher Development (Drayson Mews) Limited | Construction | 2024 |
| Pulcher Development (Salisbury Road) Limited | Construction | 2023 |
| Pulcher Development Holdings Limited | Construction | 2017 |
| Pulp and Paper Fundamental Research Society(The) | Professional & scientific | 1985 |
| Pulse on Prosperity Ltd | Administrative & support | 2012 |
| Pulse on Prosperity Working Together C.I.C. | Administrative & support | 2023 |
| Pulukelia Limited | Health & social care | 2019 |
| Pure Furniture Ltd | Wholesale & retail | 2006 |
| Pure Practice Management Ltd | Health & social care | 2022 |
| Purelypaper Ltd | Wholesale & retail | 2004 |
| Purple Panda Jobs Ltd | Administrative & support | 2018 |
| Pusser's Wharf Ltd | Hospitality | 2026 |
| PWP Carpentry & Joinery Limited | Construction | 2019 |
| Pygmalion London Limited | Wholesale & retail | 2024 |
| Pylewell Park Events Ltd | Other services | 2017 |
| Pyramid Contracting Limited | Construction | 2023 |
| Pyramid Services (South) Ltd | Construction | 2019 |
| PYT Collective Limited | Arts & recreation | 2025 |
| Pythouse Organics Ltd | Administrative & support | 2016 |
| Q Factor Limited | Professional & scientific | 2007 |
| Q.E.M (2024) Ltd | Other services | 2024 |
| QA Offshore Limited | Professional & scientific | 2012 |