| Prestige London Academy Ltd | Other services | 2023 |
| Prestige Nails Limited | Other services | 2018 |
| Prestige PUB and Restaurant Ltd | Hospitality | 2017 |
| Prestige Wedding Cars Ltd | Administrative & support | 2025 |
| Preventive Medicine Ltd | Information & communication | 2025 |
| Price Property Holdings Limited | Real estate | 2019 |
| Price Property Investments Limited | Real estate | 2020 |
| Prim Intix Ltd | Wholesale & retail | 2026 |
| Primary Care Business Solutions Ltd | Public administration | 2025 |
| Primary Care Research Hub Ltd | Health & social care | 2026 |
| Primavera Investments Ltd | Real estate | 2025 |
| Primax Services Ltd | Administrative & support | 2025 |
| Prime Developments (UK) Ltd | Construction | 2013 |
| Prime Global Media Limited | Real estate | 2015 |
| Prime Knight Limited | Administrative & support | 2018 |
| Prime Living Care Ltd | Health & social care | 2025 |
| Prime Living Management Ltd | Health & social care | 2016 |
| Prime Motor World Ltd | Wholesale & retail | 2021 |
| Prime Protect Security Ltd | Administrative & support | 2024 |
| Prime Relocate Management Ltd | Professional & scientific | 2017 |
| Prime Towers Properties Limited | Real estate | 2024 |
| Prime Vantage UK Limited | Wholesale & retail | 2025 |
| Prime Way Chauffeurs Ltd | Transport & logistics | 2025 |
| Primegate Property Ltd | Real estate | 2025 |
| Primepoint Crown Realty UK Ltd | Real estate | 2025 |
| Primestone Properties Ltd | Real estate | 2025 |
| Primetrade Ventures Limited | Wholesale & retail | 2024 |
| Primo Mobili Limited | Wholesale & retail | 2024 |
| Primrose Investment Property Ltd | Real estate | 2026 |
| Primrose Partners Ltd | Financial services | 2012 |
| Principle Creative Services Ltd | Professional & scientific | 2022 |
| Prions Inc Limited | Information & communication | 2025 |
| Pristine Car Hire Limited | Administrative & support | 2013 |
| PRK Homes Ltd | Real estate | 2022 |
| Pro Estates London Ltd | Real estate | 2024 |
| Pro Scaff (London) Limited | Construction | 2011 |
| Pro-Com Computer Services (London) Limited | Other services | 1999 |
| Process Vehicle Ltd | Other services | 2025 |
| Procom Surrey Ltd | Other services | 2003 |
| Professional Care Support Services Ltd | Health & social care | 2013 |
| Professional Maids Cleaning Services Limited | Administrative & support | 2012 |
| Professional Psychiatric Services Ltd | Health & social care | 2025 |
| Professional Pulse Law Limited | Professional & scientific | 2023 |
| Professional Stage Services Limited | Information & communication | 2010 |
| Project CC Ltd | Professional & scientific | 2025 |
| Projects Bulk Piping Limited | Wholesale & retail | 2024 |
| Prokopi Limited | Construction | 2017 |
| Prolec Building Services(Surrey) Limited | Construction | 2013 |
| Promavic Ltd | Financial services | 2025 |
| Proper Services Ltd | Administrative & support | 2025 |
| Properarc Ltd | Professional & scientific | 2021 |
| Properties Development Ltd | Construction | 2018 |
| Property 110 Ltd | Construction | 2016 |
| Property Code Limited | Construction | 2017 |
| Property Excellence Holdings Ltd | Financial services | 2026 |
| Property Excellence London Ltd | Real estate | 2023 |
| Property Famous Ltd | Other services | 2019 |
| Property Masters International Ltd | Real estate | 2022 |
| Propets Grooming Ltd | Wholesale & retail | 2025 |
| Prospe Developments Limited | Other services | 2016 |
| Prospect to Grow Ltd | Information & communication | 2016 |
| Prowood Fencing UK Ltd | Administrative & support | 2024 |
| Prozine Ltd | Real estate | 2020 |
| Pryzm Marketing & Finance Ltd | Professional & scientific | 2018 |
| PS Exteriors Limited | Wholesale & retail | 2025 |
| PSB Asset Holding Ltd | Financial services | 2026 |
| PSB LEA Road Ltd | Construction | 2026 |
| Psouth Ltd | Hospitality | 2022 |
| Psv.Electromech Limited | Manufacturing | 2015 |
| PT Decorations Ltd | Construction | 2023 |
| PTI Trading Ltd | Wholesale & retail | 2020 |
| Publicus Solutions Ltd | Information & communication | 2007 |
| Puldin UK Ltd | Construction | 2007 |
| Pule UK Ltd | Administrative & support | 2023 |
| Pulsepoint Clinical Ltd | Professional & scientific | 2025 |
| Pure Planet DRY Cleaner Ltd | Other services | 2025 |
| Pure Tasty Food Ltd | Hospitality | 2024 |
| Purely Properties Limited | Real estate | 2021 |
| Putney Beat Limited | Arts & recreation | 2024 |
| PVV1977 Ltd | Transport & logistics | 2017 |
| PW Studio Ltd | Construction | 2023 |
| Pyramid (London) Construction Ltd | Construction | 2023 |
| Pyramid Security Solutions Ltd | Administrative & support | 2022 |
| Pyramids Refurbishment Ltd | Construction | 2025 |
| Q Group of Companies Ltd | Construction | 2020 |
| Qaimah Twin Peaks Global Company Ltd | Professional & scientific | 2025 |
| Qamar Javad Ltd | Transport & logistics | 2024 |
| Qarras Ltd | Information & communication | 2026 |
| Qasim ALI Naeem Ltd | Wholesale & retail | 2026 |
| Qd&B Ltd | Education | 2022 |
| Qesm Ltd | Professional & scientific | 2023 |
| QHC Trading Limited | Hospitality | 2015 |
| Qiang Construction Ltd | Construction | 2020 |
| QMC Medical Ltd | Health & social care | 2024 |
| QT Driving School Ltd | Education | 2024 |
| Quali Trading Ltd | Wholesale & retail | 2025 |
| Quality Care Enterprise Ltd | Health & social care | 2023 |
| Quantivex Solutions Ltd | Information & communication | 2026 |
| Quantum Aecd Group UK Ltd | Financial services | 2026 |
| Quantum Developments 1 Limited | Real estate | 2026 |