| Principle Homes Limited | Construction | 2016 |
| Principles Coaching and Consulting Limited | Professional & scientific | 2020 |
| Print Cartridge Refill Ltd | Wholesale & retail | 2025 |
| Printed Polythene Holdings Ltd | Financial services | 2023 |
| Printed Polythene Limited | Wholesale & retail | 2007 |
| Printing Box Ltd | Manufacturing | 2022 |
| Printing Colour UK Limited | Manufacturing | 2013 |
| Printing for Industry Ltd | Manufacturing | 2015 |
| Printitude Limited | Manufacturing | 2025 |
| Prinwest Limited | Wholesale & retail | 1998 |
| Priority Financial Services Limited | Other services | 2017 |
| Priority Mortgages Ltd | Financial services | 2020 |
| Priority Wealth Ltd | Financial services | 2022 |
| Priory ABC Holdings Ltd | Hospitality | 2024 |
| Priory Global Ltd | Information & communication | 2024 |
| Prism 339 Ltd | Information & communication | 2022 |
| Prism Medtech Ltd | Professional & scientific | 2024 |
| Prism Pathways Limited | Administrative & support | 2024 |
| Prismadeals Limited | Wholesale & retail | 2022 |
| Pristine Investments Limited | Real estate | 2010 |
| Pristine Management Limited | Real estate | 2010 |
| Pristine Pro Services Ltd | Administrative & support | 2025 |
| Pristine Professionals Limited | Administrative & support | 2025 |
| Pristine Sprinkler Systems Limited | Public administration | 2025 |
| Pritey Glam Ltd | Wholesale & retail | 2025 |
| PRJ Ltd | Transport & logistics | 2022 |
| PRN Enterprise Ltd | Hospitality | 2019 |
| Pro Build Supplies Preston Ltd | Wholesale & retail | 2025 |
| Pro Caterquip Ltd | Construction | 2023 |
| Pro CRM Solutions Ltd | Administrative & support | 2022 |
| Pro Golf Ventures Ltd | Arts & recreation | 2025 |
| Pro LB Limited | Administrative & support | 2024 |
| Pro LED Lighting Ltd | Wholesale & retail | 2025 |
| Pro Partitioning Limited | Construction | 2024 |
| Pro PDR Limited | Wholesale & retail | 2025 |
| Pro Performance Electrical Ltd | Construction | 2019 |
| Pro PRP Clinic Ltd | Other services | 2022 |
| Pro QS Services Ltd | Professional & scientific | 2023 |
| Pro Social Partners Ltd | Administrative & support | 2024 |
| Pro Staff Ltd | Health & social care | 2021 |
| Pro TEC HGV & Plant Services Ltd | Manufacturing | 2026 |
| Pro Vista Homes & Gardens Ltd | Construction | 2026 |
| Pro-Build Plumbing & Heating Limited | Construction | 2014 |
| Pro-Stance Sports Ltd | Wholesale & retail | 2026 |
| Pro-Stone Masonry Ltd | Construction | 2019 |
| Pro-Tec Installations UK Ltd | Manufacturing | 2011 |
| Pro-Tect Security & Fire Ltd | Administrative & support | 2019 |
| Proact (Bolton) Holdings Limited | Financial services | 2018 |
| Proact Bolton Client Services Limited | Financial services | 2019 |
| Proact Financial (Bolton) Limited | Financial services | 2009 |
| Proact Occupational Health and Wellness Services Ltd | Health & social care | 2011 |
| Proact Properties Ltd | Real estate | 2018 |
| Proactive Dental Ltd | Health & social care | 2022 |
| Proair Heating & Cooling Ltd | Energy | 2025 |
| Proamix Ltd | Professional & scientific | 2014 |
| Problem Solved Property Maintenance Ltd | Construction | 2024 |
| Probuk Construction Limited | Construction | 2001 |
| Process & Manufacturing Services Installations Ltd | Administrative & support | 2023 |
| Process Safety Executive Ltd | Professional & scientific | 2026 |
| Process Seal Solutions Ltd | Administrative & support | 2026 |
| Prochamp Merch Limited | Wholesale & retail | 2025 |
| Proclean (1987) Limited | Administrative & support | 2010 |
| Procraft Flooring UK Ltd | Construction | 2025 |
| Procure Muster Ltd | Information & communication | 2025 |
| Procurement and Supply Chain Services Limited | Professional & scientific | 2012 |
| Procurement Assisted Solutions Ltd | Wholesale & retail | 2018 |
| Procurement Consultancy (GKD) Ltd | Professional & scientific | 2015 |
| Procurement Growth Group Limited | Financial services | 2026 |
| Produce UK (Fruit & VEG) Ltd | Wholesale & retail | 2024 |
| Produce UK (Manchester) Limited | Wholesale & retail | 2016 |
| Product Analytics Ltd | Information & communication | 2024 |
| Product Source Group Limited | Wholesale & retail | 2006 |
| Product Stewardship Ltd | Professional & scientific | 2019 |
| Productecom Limited | Real estate | 2025 |
| Productify Limited | Information & communication | 2021 |
| Production Equipment Hydraulics Limited | Professional & scientific | 2002 |
| Production Tooling Limited | Professional & scientific | 2022 |
| Professional and Dependable Ltd | Real estate | 2014 |
| Professional ASM Properties Ltd | Real estate | 2024 |
| Professional Assistance Ltd | Professional & scientific | 2010 |
| Professional Concrete Cutting and Coring Limited | Construction | 2010 |
| Professional Entertainments Ltd | Arts & recreation | 2022 |
| Professional Insight Marketing Ltd | Other services | 2006 |
| Professional Mobiles and Services Ltd | Wholesale & retail | 2023 |
| Profix & Build Ltd | Construction | 2025 |
| Profix NW Ltd | Construction | 2019 |
| Proform Laser Services Ltd | Manufacturing | 2016 |
| Profulfil Ltd | Wholesale & retail | 2026 |
| Programme Integrity Consulting Limited | Administrative & support | 2016 |
| Progress Health Partnerships Limited | Health & social care | 2012 |
| Progressed Clothing Limited | Wholesale & retail | 2016 |
| Progressive Holdings (NW) Limited | Financial services | 2023 |
| Progressive Sports South Lancashire Limited | Professional & scientific | 2024 |
| Progressive Technology Transformation Limited | Administrative & support | 2016 |
| Prohibition NINETEEN20 Limited | Hospitality | 2018 |
| Prohomes Properties Ltd | Real estate | 2022 |
| Project 3 Construction Ltd | Construction | 2026 |
| Project 92 Limited | Financial services | 2014 |
| Project Developments (NW) Ltd | Real estate | 2020 |
| Project Finland Bidco Limited | Financial services | 2016 |