| Primehill Care Ltd | Health & social care | 2024 |
| Primeview Ltd | Real estate | 2023 |
| Primewatch Monitoring Limited | Administrative & support | 2014 |
| Primewatch Security Limited | Administrative & support | 2012 |
| Primex Global Logistics Ltd | Transport & logistics | 2026 |
| Primo Grill UK Limited | Wholesale & retail | 2014 |
| Primrose Lane Intercontinental Limited | Construction | 2021 |
| Principle Personnel Ltd | Other services | 2015 |
| Printech Group Ltd | Manufacturing | 2025 |
| Prior and Bailey Limited | Professional & scientific | 2019 |
| Prior Construction Limited | Construction | 2015 |
| Priority Move Lettings Ltd | Real estate | 2016 |
| Priority Powder Coating Limited | Construction | 2020 |
| Priorsteps Ltd | Information & communication | 2019 |
| Priory Approved Motors Ltd | Wholesale & retail | 2023 |
| Prisha Wedding Services Ltd | Other services | 2026 |
| Prism 7 Education Ltd | Administrative & support | 2025 |
| Prism 7 Resourcing Ltd | Professional & scientific | 2019 |
| Prism Ceramics Limited | Construction | 2023 |
| Pristine Roofing & Solar Ltd | Energy | 2023 |
| Private Chef Events Limited | Hospitality | 2023 |
| Pro Auto (Essex) Limited | Wholesale & retail | 2022 |
| Pro Builds Essex Limited | Construction | 2025 |
| Pro Drain Inspections Limited | Water & waste | 2026 |
| Pro Globe Ltd. | Information & communication | 2010 |
| Pro Interior Solutions Ltd | Construction | 2023 |
| Pro IT Services Limited | Energy | 2002 |
| Pro Property Buyers Ltd | Real estate | 2021 |
| Pro-Fix K&B Installations Ltd | Construction | 2021 |
| PRO50 Ltd | Construction | 2025 |
| Probe Management & Consultancy Services Limited | Professional & scientific | 2026 |
| Processflows (UK) Limited | Information & communication | 1987 |
| Processflows Holdings Limited | Professional & scientific | 2014 |
| Prodinamic Ltd | Transport & logistics | 2014 |
| Product Plumbing & Heating Ltd | Construction | 2018 |
| Product Property Investments Limited | Real estate | 2023 |
| Proelectrum Ltd | Construction | 2025 |
| Proexcel Limited | Construction | 2023 |
| Profcladd Ltd | Construction | 2019 |
| Professional Assured SEC Limited | Administrative & support | 2021 |
| Professional Lifting Ltd | Construction | 2021 |
| Professional MAN and Van Ltd | Transport & logistics | 2025 |
| Profit Advisors Ltd | Professional & scientific | 2022 |
| Profitmind Ltd | Professional & scientific | 2015 |
| Profy Experts Ltd | Professional & scientific | 2017 |
| Progress Teaching Agency Ltd | Education | 2025 |
| Project Development & Management Ltd | Construction | 2022 |
| Project Innovations Limited | Professional & scientific | 2019 |
| Project M3 Limited | Construction | 2013 |
| Project Percy Midco Limited | Information & communication | 2024 |
| Project Portofino Bidco Limited | Manufacturing | 2023 |
| Project Portofino Midco 1 Limited | Manufacturing | 2023 |
| Project Portofino Midco 2 Limited | Manufacturing | 2023 |
| Project Portofino Topco Limited | Manufacturing | 2023 |
| Project Safety Services Ltd | Professional & scientific | 2026 |
| Project Skills Solutions Limited | Construction | 2004 |
| Promax Limited | Administrative & support | 2016 |
| Promotion Ideas Limited | Other services | 2000 |
| Prompt Healthcare Staffing Ltd | Real estate | 2013 |
| Prompt Mechanical Limited | Construction | 2020 |
| Proof of Work Ltd | Administrative & support | 2014 |
| Propelair Limited | Extraterritorial | 2001 |
| Property by Danny Ltd | Real estate | 2021 |
| Property Defender Limited | Financial services | 2024 |
| Property Development Maintenance Limited | Real estate | 2022 |
| Property Gold Limited | Construction | 2023 |
| Property GP Ltd | Real estate | 2025 |
| Property Letting Furniture Solutions Limited | Wholesale & retail | 2005 |
| Property Scope Commercial Ltd | Real estate | 2024 |
| Property Scope Limited | Real estate | 2020 |
| Property&Capital Management Group Ltd | Real estate | 2020 |
| Propertybold Limited | Households | 2025 |
| Proponn Limited | Real estate | 2026 |
| Proptech Holdings Limited | Real estate | 2022 |
| Prospect 33 Consulting Limited | Information & communication | 2010 |
| PROSPECT76 Mental Health CIC | Education | 2025 |
| PROSPECT76EVENTS Limited | Hospitality | 2020 |
| Prospects Learning Foundation Limited | Education | 1969 |
| Prospects Training Solutions Limited | Education | 1990 |
| Prospero Equity Ltd | Real estate | 2025 |
| Protection Screens Ltd | Manufacturing | 2020 |
| Protek(Uk) Ltd | Construction | 2016 |
| Proton PM Ltd | Construction | 2020 |
| Proton Technical Solutions Ltd | Construction | 2018 |
| Providence Global Finance Ltd | Financial services | 2021 |
| Providence Ministry (PM) | Other services | 2024 |
| Providence Personnels Recruitment Limited | Administrative & support | 2024 |
| Provizen Limited | Administrative & support | 2021 |
| Proxima Software Solutions Limited | Information & communication | 2009 |
| Proximity Financial Ltd | Financial services | 2020 |
| PRS Construction Limited | Construction | 2008 |
| Prudentis Computantis Limited | Professional & scientific | 2018 |
| Prut Ltd | Construction | 2020 |
| Pryma Fit Ltd | Wholesale & retail | 2025 |
| PS Golf Studio Ltd | Arts & recreation | 2021 |
| PS36 Limited | Real estate | 2006 |
| PS39 Limited | Extraterritorial | 2006 |
| PS47 Limited | Real estate | 2007 |
| PSA Trading Limited | Professional & scientific | 1994 |
| PSF Ilford Ltd | Hospitality | 2026 |