| Principle Contract Limited | Administrative & support | 2009 |
| Principle Europe Limited | Extraterritorial | 2014 |
| Principle Fabrications Limited | Manufacturing | 1988 |
| Principle Global Limited | Professional & scientific | 2006 |
| Principle Graphics Limited | Administrative & support | 1989 |
| Principle Holdings Limited | Extraterritorial | 2018 |
| Principle Secure Limited | Construction | 1992 |
| Principle Spira Limited | Extraterritorial | 2020 |
| Print ERA Limited | Information & communication | 2025 |
| Prism AG Limited | Extraterritorial | 2020 |
| Prism Agriculture Ltd | Professional & scientific | 2014 |
| Pristine P V Limited | Construction | 2019 |
| Pristine Panes Window Cleaning Limited | Administrative & support | 2023 |
| Pritchard's Quality Meats Ltd | Wholesale & retail | 2021 |
| Privacy Film Installations Limited | Professional & scientific | 2024 |
| Private Dning Club Ltd | Hospitality | 2021 |
| Priya Trading Limited | Wholesale & retail | 2025 |
| Prize Pots Ltd | Wholesale & retail | 2026 |
| PRK GAS & Plumbing 247 Ltd | Energy | 2018 |
| PRM Energy Solution Ltd | Construction | 2025 |
| Pro Carpet Cleaner and Upholstery Ltd | Administrative & support | 2024 |
| Pro Codes Solutions Ltd | Wholesale & retail | 2024 |
| Pro Crews Ltd | Administrative & support | 2009 |
| Pro Direct Consulting Ltd | Professional & scientific | 2025 |
| Pro Finish Cleaning Ltd | Administrative & support | 2021 |
| Pro Fit Physio Limited | Wholesale & retail | 2017 |
| Pro Paint Products Ltd | Wholesale & retail | 2014 |
| Pro Plumbing Yorkshire Ltd | Construction | 2021 |
| Pro Rentals & Claims Ltd | Administrative & support | 2025 |
| Pro Sport Support Ltd | Education | 2013 |
| Pro Squad Security Ltd | Administrative & support | 2021 |
| Pro Tax Partners Ltd | Extraterritorial | 2025 |
| Pro Value Construction Ltd | Construction | 2025 |
| Pro Weee Ltd | Information & communication | 2017 |
| Pro-Moi Ltd | Other services | 2018 |
| Pro-Reliability Solutions Ltd | Administrative & support | 2018 |
| Pro-Window Clean Limited | Households | 2018 |
| PRO23 Marketing Limited | Manufacturing | 2020 |
| Proactive Lodging Ltd | Real estate | 2020 |
| Proambient Ltd | Real estate | 2007 |
| Proambient Properties LLP | | 2026 |
| Probado Ltd | Information & communication | 2007 |
| Process Measurement & Analysis Limited | Manufacturing | 1971 |
| Process, Instrumentation and Design Limited | Manufacturing | 1991 |
| Procommerce Ltd | Wholesale & retail | 2020 |
| Procure Advantage Limited | Real estate | 2020 |
| Procure Recruitment Group Limited | Administrative & support | 2018 |
| Product House Ltd | Wholesale & retail | 2015 |
| Productivv Consulting Limited | Information & communication | 2019 |
| Products by A&S Ltd | Wholesale & retail | 2025 |
| Profeci Corporati Limited | Real estate | 2024 |
| Professional Clean Company Ltd | Administrative & support | 2026 |
| Professional Compliance Solutions Ltd | Other services | 2014 |
| Professional Finance Broking Limited | Other services | 2017 |
| Professional Global Advisory Services Ltd | Professional & scientific | 2024 |
| Professional Primary Care Ltd. | Professional & scientific | 2014 |
| Proform Analytics Ltd | Information & communication | 2019 |
| Proform Data Science Ltd | Information & communication | 2018 |
| Programmed Environmental Maintenance Limited | Professional & scientific | 1990 |
| Progress Centre Ltd | Arts & recreation | 2025 |
| Progress Packaging Limited | Wholesale & retail | 1997 |
| Progressive Design and Build Limited | Professional & scientific | 2009 |
| Progressive Improvement Limited | Professional & scientific | 2026 |
| Progressive Resourcing Limited | Administrative & support | 2006 |
| Progro Nutrition Limited | Wholesale & retail | 2022 |
| Prohold Limited | Real estate | 2009 |
| Project 17 Display & Exhibition Solutions Limited | Construction | 2013 |
| Project Communities CIC | Public administration | 2020 |
| Project Consulting Yorkshire Ltd | Construction | 2021 |
| Project Eight Newco Limited | Financial services | 2024 |
| Project Logistics Ltd | Transport & logistics | 2025 |
| Project Management Matters Limited | Professional & scientific | 2014 |
| Project Newcastle Private Limited | Hospitality | 2023 |
| Project Phoenix Ltd. | Health & social care | 2017 |
| Project Sport Limited | Education | 2013 |
| Project Youth Cancer | Health & social care | 2008 |
| Projects Beyond Borders Ltd | Education | 2014 |
| Propack Direct Mail Limited | Administrative & support | 2000 |
| Propark Limited | Hospitality | 2016 |
| Propel Estates Holdings Ltd | Real estate | 2025 |
| Proper Golf Colne Valley Ltd | Arts & recreation | 2026 |
| Proper Golf Limited | Arts & recreation | 2025 |
| Proper JOB Theatre Company | Arts & recreation | 2001 |
| Proper JOB Training Community Interest Company | Arts & recreation | 1985 |
| Proper Takeaways UK Limited | Hospitality | 2024 |
| Properly Managed Ltd | Real estate | 2025 |
| Properties HM Ltd | Real estate | 2023 |
| Properties Investment JP Ltd | Real estate | 2025 |
| Property 203 Ltd | Households | 2021 |
| Property by Williams Ltd | Real estate | 2025 |
| Property Hussle Ltd | Real estate | 2024 |
| Property Leeds Ltd | Real estate | 2022 |
| Property Rise Ltd | Real estate | 2023 |
| Property Scout Ltd | Administrative & support | 2025 |
| Property Solutions Huddersfield Ltd | Real estate | 2025 |
| Property Tax Specialists Limited | Professional & scientific | 2024 |
| Prophets Grandchildren AHL AL Bayt Centre CIC | Education | 2023 |
| Proposal Partners Limited | Administrative & support | 2025 |
| Props Yorkshire Ltd | Construction | 2020 |
| Proremaps Ltd | Wholesale & retail | 2023 |