| Platinum Electrical Solutions Limited | Construction | 2011 |
| Platinum Garden Services Ltd | Administrative & support | 2026 |
| Platinum Props Limited | Other services | 2010 |
| Platinum Renewable Solutions Limited | Energy | 2023 |
| Platinum Tree Services Ltd | Administrative & support | 2022 |
| Platinum World Investments Limited | Financial services | 2016 |
| Plaza on Hyde Park Limited | Hospitality | 1997 |
| Plenham Limited | Information & communication | 1988 |
| Plum Tree Services Ltd | Administrative & support | 2026 |
| Plumbing SMS Ltd | Other services | 2024 |
| PME Land Limited | Construction | 2026 |
| Pocr Holdings Ltd | Real estate | 2022 |
| Poet Studio Limited | Other services | 2019 |
| Polias Ltd | Construction | 2024 |
| Polograd Investments Limited | Administrative & support | 2021 |
| Polykin Limited | Information & communication | 2023 |
| Polymath Media Ltd | Information & communication | 2012 |
| Pondok Properties Limited | Real estate | 2020 |
| Pondwater Films Ltd | Information & communication | 2024 |
| Popeswood Construction Ltd | Professional & scientific | 2014 |
| Port Meadow Limited | Real estate | 2000 |
| Portmay Properties Limited | Real estate | 1982 |
| PP Technical Ltd | Information & communication | 2020 |
| Practical Safety Services Limited | Professional & scientific | 2015 |
| Praxis Coach Consulting Limited | Education | 2014 |
| Precision Cleaning Team Ltd | Administrative & support | 2025 |
| Precision Survey Technologies Ltd | Professional & scientific | 2023 |
| Precision Vision Limited | Health & social care | 2018 |
| Predictable Delivery Ltd | Professional & scientific | 2024 |
| Premium Home Properties Limited | Real estate | 2023 |
| Prestige Hygiene Services Limited | Water & waste | 1998 |
| Pretty Arty Limited | Extraterritorial | 2007 |
| Pride Construction & Development Ltd | Construction | 2019 |
| Prim Line Ltd | Transport & logistics | 2026 |
| Prime Executives Ltd | Administrative & support | 2024 |
| Prism Construction Management Ltd | Other services | 2014 |
| Prismek Ltd | Information & communication | 2018 |
| Privategate Residents Management Limited | Households | 1987 |
| Pro Cargo Limited | Transport & logistics | 2023 |
| Pro Negotium Limited | Information & communication | 2016 |
| Proactive Public Affairs Limited | Professional & scientific | 2017 |
| Probabilitas Consulting Limited | Professional & scientific | 2014 |
| Procare Women Health Limited | Wholesale & retail | 2016 |
| Process Tech Ltd | Information & communication | 2011 |
| Product Seventeen Ltd | Professional & scientific | 2023 |
| Productivity Kick Ltd | Information & communication | 2024 |
| Profile Technology Services Limited | Information & communication | 1988 |
| Proform Contractors Limited | Real estate | 2021 |
| Proform Holdco Ltd | Financial services | 2026 |
| Proform Holdings Ltd | Financial services | 2026 |
| Proformance Global Limited | Arts & recreation | 2016 |
| Proformance Pathways CIC | Arts & recreation | 2021 |
| Profound Digital Limited | Administrative & support | 2016 |
| Project Lennon Limited | Financial services | 2013 |
| Project Point AI Ltd | Extraterritorial | 2024 |
| Project Point Ltd | Professional & scientific | 2024 |
| Project Simplicity Limited | Professional & scientific | 2023 |
| Promain Group Ltd | Wholesale & retail | 2022 |
| Promotional Works Ltd | Professional & scientific | 2012 |
| Pronto Medical Communications Limited | Professional & scientific | 2024 |
| Proper Tebo Limited | Other services | 2024 |
| Properties at Thurlestone Limited | Real estate | 1986 |
| Propped UP Limited | Arts & recreation | 2000 |
| Protea PM Ltd | Households | 2025 |
| Protein Ltd | Health & social care | 2025 |
| Psiotec Limited | Administrative & support | 2004 |
| Psychological Hub Ltd | Health & social care | 2022 |
| PUB on the Pond 24 Ltd | Hospitality | 2026 |
| PUP Paradise Ltd | Other services | 2024 |
| Puppy Worldwide Ltd | Extraterritorial | 2022 |
| Purajit Constructiions Ltd | Construction | 2024 |
| Pure Acoustic Limited | Manufacturing | 2011 |
| Purespark Cleaners Ltd | Administrative & support | 2020 |
| Purple Mango Education Limited | Administrative & support | 2023 |
| Purple Patch Events London Ltd. | Professional & scientific | 2004 |
| Pwzw Partnership Limited | Professional & scientific | 2025 |
| PY Psychology Ltd | Professional & scientific | 2025 |
| Pyne Retail Limited | Real estate | 2015 |
| QCS Group Holdings Limited | Financial services | 2022 |
| QCS Staffing Group Ltd | Professional & scientific | 2017 |
| QCS Staffing Ltd | Professional & scientific | 1992 |
| Quail Homes Ltd | Real estate | 2016 |
| Qualified Talent Limited | Administrative & support | 2017 |
| Qualifix Installations J.C Ltd | Construction | 2024 |
| Quality Blueprint Ltd | Professional & scientific | 2022 |
| Quality Plasterwork & Rendering Ltd | Construction | 2021 |
| Quanta Consultancy Services Limited | Extraterritorial | 2024 |
| Quantum Professional Services Limited | Professional & scientific | 1995 |
| Quincey Consulting Ltd | Professional & scientific | 2024 |
| R & D Electrical Limited | Other services | 2002 |
| R and R Electrical Ltd | Construction | 2021 |
| R R Tompkins Plumbing & Heating Contractors Limited | Construction | 2011 |
| R&A Education Solutions Ltd | Administrative & support | 2025 |
| R&A Soccer Ltd | Education | 2026 |
| R&P Painting and Decorating Limited | Construction | 2019 |
| Rabbit Lane Limited | Real estate | 2020 |
| Rachael Lloyd Ltd | Health & social care | 2025 |
| Radford Building Services Limited | Construction | 2022 |
| Radford Developments Ltd | Construction | 2018 |
| Raglan House Kilfillan Gardens RTE Company Limited | Households | 2003 |