| P.S.S. Building Services Ltd | Construction | 2014 |
| Pack Developments Ltd | Construction | 2022 |
| Packham Safety Consulting Limited | Professional & scientific | 2017 |
| Pagoda Building & Maintenance Limited | Construction | 2005 |
| Pagoman Ltd | Real estate | 2025 |
| Paige Starbucks School of Dance Limited | Arts & recreation | 2023 |
| Paine Brothers Limited | Administrative & support | 2012 |
| Palace Group Erith Limited | Wholesale & retail | 2019 |
| Palace Lifts Ltd | Manufacturing | 2010 |
| Paldron Limited | Professional & scientific | 2006 |
| Palm Beech Ltd | Construction | 2026 |
| Palmer & Greenwood Ltd | Administrative & support | 2016 |
| PAM59 Limited | Real estate | 2017 |
| Pana Property Ltd | Administrative & support | 2024 |
| Panpi Ltd | Real estate | 2020 |
| Papadam Indian Sidcup Ltd | Hospitality | 2019 |
| Paper Avenue Limited | Manufacturing | 2018 |
| Paragon Electrical Installations Limited | Construction | 2021 |
| Paragon Production Services Ltd | Other services | 2021 |
| Paramount Elevator Services Limited | Construction | 2021 |
| Parchment Crafted Interiors Limited | Construction | 2025 |
| Paris Daley Limited | Professional & scientific | 2025 |
| Park Health Ltd | Wholesale & retail | 2010 |
| Park Hill Properties (Southern) Ltd | Administrative & support | 2006 |
| Park View Building Investments Limited | Financial services | 2017 |
| Parkfield Controls Limited | Construction | 2026 |
| Parkside Cafe Limited | Hospitality | 2007 |
| Parlour Maids Limited | Administrative & support | 2026 |
| Parsonage Woodlands Limited | Hospitality | 2023 |
| Parsons Inc Ltd | Other services | 2025 |
| Pasifull Assessing Construction Management Ltd | Education | 2025 |
| Pask Holdings Limited | Financial services | 2014 |
| Pathfinder Consultancy Limited | Administrative & support | 2015 |
| Pathfinder Vehicle Solutions Ltd | Transport & logistics | 2025 |
| Patientway Ltd | Transport & logistics | 2026 |
| Patsimbu Ltd. | Health & social care | 2012 |
| Pattern Development Limited | Other services | 2012 |
| Pattern Wright Ltd | Administrative & support | 2006 |
| Paul Booker Utilities Limited | Administrative & support | 2018 |
| Paul Creed (Building Services) Limited | Construction | 1998 |
| Paul Eastwood Ltd. | Arts & recreation | 2010 |
| Paul Hazell Consulting Ltd | Administrative & support | 2024 |
| Paula Clean Contractors Limited | Administrative & support | 2009 |
| Paula Clean Ltd | Administrative & support | 2006 |
| Paulus Holdings Limited | Real estate | 2025 |
| Pawfect Dogs Ltd | Other services | 2016 |
| Paynes Properties Limited | Real estate | 2018 |
| PB Inc Property Maintenance Limited | Financial services | 2015 |
| PC Printing & Mailing Services Limited | Administrative & support | 2010 |
| PCB Mechanical & Electrical Contractors Ltd | Construction | 2025 |
| PDH Creative Services Limited | Arts & recreation | 2015 |
| Peachy Projects Limited | Administrative & support | 2017 |
| Peakpoint Limited | Administrative & support | 2016 |
| Pearline Events Ltd | Other services | 2018 |
| Pearson Property Management Limited | Real estate | 2019 |
| Peatfield (Management Company) Limited | Households | 1987 |
| Peerless Installation Services Limited | Administrative & support | 2017 |
| PEF 1 Limited | Real estate | 2026 |
| Pegasus SPV Ltd | Financial services | 2022 |
| Pelham Point Limited | Administrative & support | 2021 |
| Pelmondo Holdings Limited | Financial services | 2021 |
| Penshurst Plastering Ltd | Construction | 2010 |
| People Focused Consulting Limited | Administrative & support | 2024 |
| People Work (Consulting) Ltd | Professional & scientific | 2007 |
| Pepe Y Pepa Limited | Hospitality | 2013 |
| Pepo LA Tumaini | Health & social care | 2015 |
| PER JU Properties Limited | Real estate | 2024 |
| Perfect Circle Construction Ltd | Construction | 2023 |
| Perfect Glow Services Limited | Construction | 2018 |
| Perfect Grass Limited | Administrative & support | 2008 |
| Perfect Power Electrical Solutions Ltd | Construction | 2020 |
| Performance Interpreting Limited | Administrative & support | 2017 |
| Permanent Way Engineering Services Limited | Construction | 2020 |
| Perry Vale 1 Limited | Real estate | 2022 |
| Personal and Professional Development Limited | Extraterritorial | 2018 |
| Personal Transformation Limited | Administrative & support | 1999 |
| Pest Control Group Ltd | Other services | 2026 |
| Peter ELY Plumbing and Heating Limited | Construction | 2014 |
| Petra Molnar Limited | Health & social care | 2015 |
| Petrie Creative Limited | Administrative & support | 2020 |
| Petroleum Seals and Systems Limited | Manufacturing | 2001 |
| Pets on Road Ltd | Transport & logistics | 2018 |
| Petty Freeman Estates Limited | Real estate | 2004 |
| PFE Direct Limited | Construction | 2018 |
| PGA Advisory Limited | Professional & scientific | 2026 |
| PGM Consultancy Services Limited | Professional & scientific | 2018 |
| PH Ventures Ltd | Manufacturing | 2022 |
| PH83 Limited | Construction | 2026 |
| Phacta Ltd | Real estate | 2019 |
| Pharma Rite Limited | Wholesale & retail | 2023 |
| Pharmacloud Limited | Professional & scientific | 2009 |
| Pharmtrack Limited | Health & social care | 2019 |
| Phase Two Artists Limited | Professional & scientific | 2010 |
| Phidel BSL Limited | Administrative & support | 2020 |
| Philipp Ertl Design Limited | Professional & scientific | 2010 |
| Phillips Property Consultants Limited | Administrative & support | 2016 |
| PHK Ventures Limited | Real estate | 2025 |
| PHM Medical Limited | Health & social care | 2016 |
| Phoenix Building Consultancy Limited | Professional & scientific | 2011 |
| Phoenix Decorating Services (London) Limited | Administrative & support | 2010 |