| Oxlearn Ltd | Education | 2024 |
| Oxycer London Global Business Ltd | Wholesale & retail | 2025 |
| P & P Morah Limited | Real estate | 2009 |
| P&I Construction Ltd | Construction | 2014 |
| P&I Properties Ltd | Real estate | 2018 |
| PA Hospitality Services Ltd | Professional & scientific | 2024 |
| Pacific Commercial Ltd | Real estate | 2006 |
| Pacific Residential Ltd | Real estate | 2006 |
| Padel Devco Ltd | Construction | 2026 |
| Palladium Construction Ltd | Construction | 2025 |
| Palmer's Plants & Gardening LP | | 2018 |
| Pals Accountants Ltd | Professional & scientific | 2023 |
| Paluca Construction Ltd | Construction | 2021 |
| Panache Ladieswear Limited | Real estate | 1975 |
| Parcela Investments Limited | Real estate | 2017 |
| Paresh Limited | Wholesale & retail | 2004 |
| Parkside Developers Ltd | Construction | 2016 |
| Parsons on Film Ltd | Information & communication | 2026 |
| Parveen Estates Limited | Real estate | 2018 |
| Patrimonyvr Limited | Information & communication | 2014 |
| Paulo Cutin Ltd | Education | 2022 |
| PBS Capital Education Ltd | Education | 2024 |
| PBS Care Homes Ltd | Health & social care | 2018 |
| PBS Investment Group Ltd | Real estate | 2017 |
| Peerless Health Ltd | Financial services | 2019 |
| Penguin Blue Communications Ltd | Professional & scientific | 2025 |
| Penther Solar Ltd | Construction | 2023 |
| Pepper Cloud Solutions Ltd | Information & communication | 2016 |
| Peppergold Limited | Real estate | 2003 |
| Petals Care Agency Limited | Professional & scientific | 2019 |
| PGS Groundwork Solution Ltd | Construction | 2024 |
| Phalkam UK Ltd | Real estate | 2025 |
| Phase Electric Contractors Limited | Construction | 2018 |
| PHB Plumbing Services Limited | Construction | 2011 |
| Phoenix Mahomed Limited | Financial services | 2012 |
| Phoenix Properties (SE) Limited | Real estate | 2015 |
| Pink Peppercorn Investments Ltd | Real estate | 2023 |
| Pinnacle Films and Studio Limited | Information & communication | 2021 |
| Pioneering Properties Ltd | Real estate | 2018 |
| Pipmedia Limited | Administrative & support | 2018 |
| PJ London Ltd | Construction | 2019 |
| PJ Manor Holdings Limited | Financial services | 2025 |
| Plam-Gas Ltd | Construction | 2011 |
| Plant Shack Ltd | Administrative & support | 2015 |
| Plantworlduk Limited | Wholesale & retail | 2024 |
| Platinum POD Limited | Real estate | 2006 |
| Playzone Day Nursery Limited | Extraterritorial | 2007 |
| Plexcroft Limited | Real estate | 2014 |
| Plumbcentral Plumbing & Heating Ltd | Construction | 2025 |
| Plumbing and Heating Medics Ltd | Construction | 2018 |
| PM GAS Ltd | Construction | 2018 |
| Pointview Property Limited | Real estate | 2024 |
| Poiss London Limited | Manufacturing | 2013 |
| Pomegranate International Pictures Limited | Arts & recreation | 2019 |
| Pony Riding for the Disabled Trustee (Chigwell) Company | Education | 1992 |
| Popular Hair Studio Ltd | Other services | 2023 |
| Praxis Digital Services Limited | Information & communication | 2020 |
| Precision Worldwide Limited | Information & communication | 2012 |
| Prekean Essential Ltd | Wholesale & retail | 2026 |
| Premier Automated Systems Ltd | Construction | 2015 |
| Presidential Asset Management Limited | Real estate | 2020 |
| Presidential Removal Ltd | Transport & logistics | 2021 |
| Prigger Limited | Wholesale & retail | 2022 |
| Primeview Prop Limited | Real estate | 2024 |
| Prisoners ØF Hope Ltd | Manufacturing | 2025 |
| Pro Cladding&Lifting Ltd | Construction | 2022 |
| Proceed Engineering Limited | Manufacturing | 2022 |
| Procezo Ltd | Information & communication | 2025 |
| Professional Accountants Ltd | Professional & scientific | 2007 |
| Professional Anaesthesia Limited | Health & social care | 2012 |
| Professional Icon Limited | Professional & scientific | 2025 |
| Professional Idiot Records Ltd | Information & communication | 2022 |
| Profumo the Musical Limited | Professional & scientific | 2012 |
| Prop Siteland Limited | Real estate | 2023 |
| Propdoor Limited | Real estate | 2025 |
| Propelled Group Ltd | Other services | 2023 |
| Propelled Holdings Ltd | Other services | 2024 |
| Property and Development Limited | Real estate | 2006 |
| Prophold Estates Ltd | Real estate | 2024 |
| Propkey Ventures Limited | Real estate | 2024 |
| Proprim Ltd | Construction | 2017 |
| Propstone Co Limited | Real estate | 2024 |
| Providus Developments Limited | Construction | 2002 |
| Proxima Properties Ltd | Real estate | 2018 |
| PRX Enterprise Limited | Information & communication | 2024 |
| PSR Supply Ltd | Wholesale & retail | 2025 |
| Psychii Ltd | Information & communication | 2017 |
| Public Homes Ltd | Real estate | 2025 |
| Pure Luxe Clean Ltd | Administrative & support | 2026 |
| Purple COW Media Ltd | Information & communication | 2009 |
| Purple Flag Limited | Professional & scientific | 2022 |
| PVP Installation Ltd | Construction | 2019 |
| Pycress Properties Limited | Real estate | 2002 |
| PYR Topco Limited | Financial services | 2024 |
| Q.S. Offshore Associates Limited | Administrative & support | 2020 |
| QCS Construction Ltd | Construction | 2023 |
| QR Consultants Ltd | Administrative & support | 2025 |
| Qrip IT Ltd | Information & communication | 2023 |
| Qualigrowth Limited | Professional & scientific | 2025 |
| Quick Services Ltd | Construction | 2024 |