| Pristine Barbers Ltd | Other services | 2024 |
| Prisum Ltd | Wholesale & retail | 2012 |
| Privacy Limited | Wholesale & retail | 2019 |
| Private Health University Hospitals Dorset Limited | Health & social care | 2007 |
| Private Office Legal Services Limited | Professional & scientific | 2014 |
| Privatint Ltd | Professional & scientific | 2019 |
| Prize Oasis Ltd | Arts & recreation | 2024 |
| PRM Medical Limited | Health & social care | 2022 |
| Pro ACC Group Ltd | Professional & scientific | 2024 |
| Pro ACC Ltd | Professional & scientific | 2022 |
| Pro Boost Auto Ltd | Wholesale & retail | 2025 |
| Pro Build South Limited | Construction | 2014 |
| Pro Homes Subcontractors Ltd | Construction | 2025 |
| Pro Methods Ltd | Information & communication | 2022 |
| Pro Seal Roof Care Ltd | Construction | 2025 |
| Pro Studio L&B Ltd | Other services | 2023 |
| Pro Training Company Limited Ltd | Administrative & support | 2022 |
| Pro UK Services Ltd | Administrative & support | 2025 |
| Pro-Clean Services Limited | Administrative & support | 2003 |
| Pro-Line Brickwork Limited | Construction | 2015 |
| Pro-Line Homes Ltd | Real estate | 2021 |
| Pro-Mitra Ltd | Construction | 2025 |
| Pro-Roofrestoration Ltd | Construction | 2017 |
| Pro-Tekt Scaffolding Solutions Limited | Construction | 2012 |
| Proactive (South) Limited | Professional & scientific | 2001 |
| Probeachbum Ltd | Manufacturing | 2020 |
| Probio Kombucha Ltd | Wholesale & retail | 2020 |
| Procool Solutions Ltd | Professional & scientific | 2021 |
| Procter Properties Ltd | Real estate | 2025 |
| Procyber Limited | Information & communication | 2025 |
| Procyon Holdings Limited | Financial services | 2025 |
| Prodigy Property Group Ltd | Real estate | 2021 |
| Prodis International Ltd | Construction | 2021 |
| Prodryuk Ltd | Construction | 2019 |
| Product by Design Limited | Professional & scientific | 2011 |
| Product Manufacturing Solutions Ltd | Manufacturing | 2019 |
| Professional Elena Cleaning Limited | Administrative & support | 2013 |
| Professional Property Management Ltd. | Real estate | 1980 |
| Professional Resilience Limited | Professional & scientific | 2019 |
| Professional Software Design Limited | Wholesale & retail | 1983 |
| Professions Loans Limited | Financial services | 2014 |
| Profit 4 Future Ltd | Financial services | 2016 |
| Proformance Clinics Limited | Public administration | 2018 |
| Profuse Marketing Limited | Administrative & support | 2017 |
| Progress English Ltd | Education | 2024 |
| Progress Health and Wellness Limited | Health & social care | 2021 |
| Progressive Marketing Ltd | Professional & scientific | 2021 |
| Progresso Interim Limited | Administrative & support | 2020 |
| Progresso Limited | Administrative & support | 2017 |
| Project 22 Ltd | Professional & scientific | 2016 |
| Project 664 Ltd | Construction | 2023 |
| Project Ceres Bidco Limited | Financial services | 2022 |
| Project Ceres Midco 1 Limited | Financial services | 2022 |
| Project Ceres Midco 2 Limited | Financial services | 2022 |
| Project Ceres Topco Limited | Financial services | 2022 |
| Project City Marketing Ltd | Water & waste | 2017 |
| Project Guard Ltd | Information & communication | 2023 |
| Project Industrial Solutions Ltd | Manufacturing | 2014 |
| Project Solutions Southern Limited | Construction | 2022 |
| Project Thirty Limited | Arts & recreation | 2020 |
| Project World Ltd | Wholesale & retail | 2024 |
| Project YOU Online Ltd | Other services | 2021 |
| Project, Technology and Education Services Ltd | Information & communication | 2019 |
| PROJECT24 Design Limited | Information & communication | 2002 |
| Projectsr Ltd | Professional & scientific | 2024 |
| Prokil Holdings Limited | Professional & scientific | 2015 |
| Prokil Limited | Construction | 2002 |
| Prolectrical Southern Ltd | Manufacturing | 2011 |
| Prometheus X Limited | Professional & scientific | 2021 |
| Promiseland Ltd | Information & communication | 2013 |
| Promo Paul Limited | Manufacturing | 2025 |
| Promote Children & Young People Ltd | Professional & scientific | 2025 |
| Promotional Resources and Logistics Limited | Wholesale & retail | 2015 |
| Pronto Service Solutions Limited | Administrative & support | 2025 |
| Proofterior Group Limited | Construction | 2024 |
| Prop Mark Estates Limited | Real estate | 2022 |
| Propelite Limited | Professional & scientific | 2023 |
| Property Black Box Limited | Real estate | 2022 |
| Property Build Limited | Construction | 2010 |
| Property by Pearl Ltd | Real estate | 2024 |
| Property Clean & Maintenance Ltd | Administrative & support | 2026 |
| Property Efficiency Group Ltd | Construction | 2026 |
| Property NV Limited | Real estate | 2021 |
| Property Possibilities Ltd | Real estate | 2022 |
| Property Shop (South) Ltd | Real estate | 2015 |
| Property Wave Investments Ltd | Real estate | 2016 |
| Proplus Marketing Limited | Extraterritorial | 2018 |
| Propport Limited | Information & communication | 2023 |
| Proprietary Managements Limited | Households | 1955 |
| Proprofit Limited | Extraterritorial | 1981 |
| Prorento Limited | Real estate | 2024 |
| Prosolar Renewables Ltd | Construction | 2019 |
| Prosper Accountancy & Tax Ltd | Professional & scientific | 2021 |
| Prosperity Automotive Ltd | Wholesale & retail | 2026 |
| Prostar Energy Ltd | Construction | 2019 |
| Prostay Solutions Limited | Hospitality | 2025 |
| Protea Solutions Limited | Administrative & support | 2015 |
| Protecnet Limited | Information & communication | 2025 |
| Protected Payment Services Ltd | Administrative & support | 2017 |
| Protected Travel Services Ltd | Administrative & support | 2005 |