| Pearce Accounts Limited | Professional & scientific | 2013 |
| Peerless Street Residents Limited | Real estate | 2013 |
| PEG Digital Design Limited | Information & communication | 2013 |
| Pegwell Bay Development One Limited | Construction | 2018 |
| Pegwell Bay Property Consultants Limited | Construction | 2018 |
| Pennant Property Holdings & Co. Limited | Real estate | 2001 |
| Penny Kennedy Limited | Extraterritorial | 2003 |
| Pentagon Developments South East Ltd | Other services | 2016 |
| Perry Vale Developments Limited | Construction | 2019 |
| Pestel Accountancy Ltd | Professional & scientific | 2025 |
| Peter Schive Limited | Transport & logistics | 2003 |
| Peterborough (Progress Health) Holdings Limited | Financial services | 2007 |
| Peterborough (Progress Health) Nominee Limited | Financial services | 2007 |
| Peterborough (Progress Health) PLC | Construction | 2007 |
| PFA Neptune Holding (UK) Limited | Financial services | 2017 |
| PFT Holdings Limited | Financial services | 2025 |
| Phantom Bridge IS Ltd | Financial services | 2026 |
| Phase Properties Ltd | Real estate | 2018 |
| Phil DE Phil UK Ltd | Administrative & support | 2014 |
| Philip&Co Limited | Professional & scientific | 2024 |
| Phirst Precision Carbide Limited | Manufacturing | 2005 |
| Phoenix Lifts Ltd | Professional & scientific | 2018 |
| Phox Ltd | Real estate | 2022 |
| Pierrepoint Limited | Real estate | 2022 |
| Piie Technologies Limited | Information & communication | 2026 |
| Pike & Chapman Limited | Construction | 2020 |
| Pilaforma Ltd | Information & communication | 2026 |
| Pinnacle Homes South East Limited | Construction | 2016 |
| Pinnacle Paving Co Limited | Administrative & support | 2009 |
| Pinnacle Property Southeast Limited | Real estate | 2022 |
| Pinnacle White Consulting Ltd | Information & communication | 2019 |
| Pipeline Utilities Ltd | Construction | 2010 |
| Pivotal Logic Limited | Information & communication | 2020 |
| Pivotal Logic Properties Limited | Real estate | 2023 |
| PK Mortgage Services Limited | Administrative & support | 2006 |
| PKA Teesrep Holding (UK) Limited | Administrative & support | 2016 |
| PKA Wlwf Holding (UK) Limited | Financial services | 2017 |
| Planet of the Grapes Ltd | Hospitality | 2007 |
| Plantation Shutters and Blinds Ltd | Manufacturing | 2025 |
| Plastertec Solutions Limited | Construction | 2024 |
| Platinum Development Southern Ltd | Construction | 2025 |
| Platinum Plant Supplies Limited | Administrative & support | 2016 |
| Platinum Plus Property Ltd | Real estate | 2018 |
| Player Value Limited | Information & communication | 2023 |
| PLT Services Limited | Other services | 2007 |
| Plumbing Innovation Wizards Limited | Wholesale & retail | 2024 |
| Plus Training Limited | Education | 2024 |
| PNP Agency Ltd | Health & social care | 2023 |
| PNS Interior Ltd | Construction | 2017 |
| Popbitch Limited | Information & communication | 2014 |
| Popdog Limited | Information & communication | 2000 |
| Port Meadow Estates Limited | Real estate | 2020 |
| Porte Noire Kings Cross Ltd | Wholesale & retail | 2020 |
| Porters Print Ltd | Manufacturing | 2022 |
| Portfolio Homes BW Limited | Professional & scientific | 2024 |
| Portfolio Homes Grassy Lane Limited | Construction | 2021 |
| Portfolio Project Management Limited | Information & communication | 2017 |
| Portfolio Rentals Surrey Ltd | Real estate | 2021 |
| Power Build Solutions Ltd | Construction | 2024 |
| Powermind Solutions Limited | Information & communication | 2019 |
| PRB Estates Limited | Construction | 2000 |
| Premtek Limited | Wholesale & retail | 2015 |
| Prestige Autos Surrey Ltd | Wholesale & retail | 2023 |
| Prestige Security Systems Limited | Administrative & support | 2004 |
| Prichard Court (Management) Limited | Households | 2021 |
| Primrose Lettings Ltd | Real estate | 2015 |
| Primus Security Solutions Ltd | Administrative & support | 2016 |
| Prive Elite Global Limited | Transport & logistics | 2025 |
| Pro Lavish Landscapes Ltd | Administrative & support | 2025 |
| Proclaim Construction and Waterproofing Limited | Construction | 2025 |
| Prodrive Hub Ltd | Wholesale & retail | 2023 |
| Production Zync Ltd | Arts & recreation | 2013 |
| Professional Training Solutions Limited | Education | 2006 |
| Profix Services Ltd | Real estate | 2021 |
| Project Consultant Services Limited | Administrative & support | 2004 |
| Project YEN Ltd | Information & communication | 2016 |
| Prolec Engineering (London) Ltd | Construction | 2017 |
| Proper Fundraising Ltd | Other services | 2026 |
| Property Retrievers Ltd | Construction | 2021 |
| Prospect Healthcare (Hairmyres) Group Limited | Professional & scientific | 2003 |
| Prospect Healthcare (Hairmyres) Holdings Limited | Professional & scientific | 1998 |
| Prospect Healthcare (Hairmyres) Limited | Health & social care | 1998 |
| Prospect Healthcare (Hairmyres) Resources | Financial services | 2004 |
| Prospect Healthcare (Hinchingbrooke) Holdings Limited | Administrative & support | 2003 |
| Prospect Healthcare (Hinchingbrooke) Limited | Administrative & support | 2003 |
| Prospect Healthcare (Reading) Holdings Limited | Professional & scientific | 2001 |
| Prospect Healthcare (Reading) Limited | Administrative & support | 1999 |
| Prospect Pubs (the Coast Inn) Limited | Real estate | 2025 |
| Provender Nurseries Limited | Wholesale & retail | 2003 |
| PRS Southeast Limited | Wholesale & retail | 2020 |
| Psdl Limited | Financial services | 2023 |
| PSM Pharm Ltd | Wholesale & retail | 2024 |
| PT Cranes Services Ltd | Construction | 2015 |
| Pump Service Engineers Limited | Professional & scientific | 2018 |
| Pure Funding Solutions Limited | Extraterritorial | 2011 |
| Purlman Associates Limited | Real estate | 2016 |
| Purpose & Bliss Consultancy Limited | Professional & scientific | 2025 |
| PW Maintenance Services Limited | Construction | 2024 |
| Pybus Properties Limited | Households | 2024 |
| Pyramid Schools (Sheffield) Limited | Administrative & support | 2000 |