| PROPCORP201 Ltd | Real estate | 2026 |
| Propel Hospitality Limited | Professional & scientific | 2012 |
| Propel Info Limited | Professional & scientific | 2011 |
| Propel International Ltd | Other services | 2022 |
| Propel Property Finance Ltd | Financial services | 2025 |
| Proper Ideas Limited | Manufacturing | 2020 |
| Properlytics Limited | Information & communication | 2012 |
| Property Asset Management Long-Term Investment Company Ltd | Real estate | 2017 |
| Property Choice Limited | Real estate | 1997 |
| Property Dreams Come True Limited | Real estate | 2014 |
| Property for the People LLP | | 2014 |
| Property Intellects Limited | Real estate | 2020 |
| Property Investors Academy Ltd | Education | 2017 |
| Property Nationwide Developments Limited | Real estate | 2023 |
| Property Nationwide Ltd | Real estate | 2019 |
| Property People Dealing Limited | Real estate | 2025 |
| Property People Investments Limited | Construction | 2014 |
| Property TIE Ltd | Construction | 2022 |
| Propmor Limited | Real estate | 2025 |
| Propor Ltd | Real estate | 2005 |
| Proposal Document Management Limited | Other services | 2007 |
| Propriety Scope Limited | Information & communication | 2016 |
| Propserv Group Ltd | Manufacturing | 2018 |
| Proscribe Ltd | Professional & scientific | 2012 |
| Prosperion Holdings Ltd | Financial services | 2026 |
| Prosperous Homes Ltd | Real estate | 2019 |
| Prospray London Limited | Construction | 2011 |
| Protagonistech Ltd | Professional & scientific | 2023 |
| Protea Care Homes (Kent) Ltd | Health & social care | 2013 |
| Protea Gardens Herts Ltd | Real estate | 2021 |
| Protea Impilo Ltd | Health & social care | 2012 |
| Protea Propco Ltd | Real estate | 2020 |
| Protea Radlett Ltd | Real estate | 2020 |
| Protea Staffing Ltd | Other services | 2020 |
| Protech AC Ltd | Energy | 2014 |
| Protek PAY Ltd | Administrative & support | 2021 |
| Protem Solutions Ltd | Construction | 2021 |
| Proteq Security Ltd | Administrative & support | 2011 |
| Proton Products International Limited | Administrative & support | 2005 |
| Proton Projects Limited | Administrative & support | 1996 |
| Prototype Design Agency Limited | Professional & scientific | 2010 |
| Proud Bodywork Ltd | Wholesale & retail | 2018 |
| Provide PAY Limited | Administrative & support | 2019 |
| Providence Consulting Ltd | Professional & scientific | 2021 |
| Prowell Partners LLP | | 2010 |
| Proxter Limited | Information & communication | 2016 |
| PRP Advisory Limited | Professional & scientific | 2019 |
| Pruzone Healthcare Ltd | Professional & scientific | 2026 |
| PRV Partners Limited | Real estate | 2024 |
| PRV Professionals Ltd | Information & communication | 2025 |
| Pryskrouz Ltd | Wholesale & retail | 2024 |
| Prysm Credit Ltd | Information & communication | 2026 |
| PS Atelier Limited | Manufacturing | 2026 |
| PS Holdco Limited | Financial services | 2019 |
| PS Tyre Brigade Limited | Wholesale & retail | 2014 |
| PSA Consultants Ltd | Information & communication | 2018 |
| PSC Health Care Ltd | Health & social care | 2022 |
| PSD Wills & Trusts Limited | Administrative & support | 2010 |
| Psel Ltd | Other services | 2016 |
| PSI Metals UK Limited | Information & communication | 2002 |
| PSM Commercial Enterprises Ltd | Real estate | 2018 |
| PSM Informatics Limited | Information & communication | 2020 |
| PSM Logistics Ltd | Transport & logistics | 2016 |
| PSP Engineering Ltd | Financial services | 2026 |
| PSQ Limited | Professional & scientific | 2014 |
| Psycho Logic Solutions Limited | Health & social care | 2019 |
| Psychologia Ltd | Health & social care | 2011 |
| PT1 Venture Services UK Ltd | Professional & scientific | 2022 |
| Ptechelectrics Ltd | Construction | 2024 |
| PTN Consultancy Limited | Professional & scientific | 2013 |
| PUB Food London Ltd | Hospitality | 2025 |
| Publicity Studio Limited(The) | Professional & scientific | 1980 |
| Puckatucka Ltd | Hospitality | 2014 |
| Puckrup Hall Hotel Limited | Hospitality | 1997 |
| Pudding Lane Limited | Hospitality | 2017 |
| Pulcris Plumbing Services Limited | Construction | 2022 |
| Pulo Training Ltd | Education | 2022 |
| Pulse PCO Hire Ltd | Administrative & support | 2025 |
| Pulse Real Estate Ltd | Real estate | 2022 |
| Pumba Ventures Ltd | Real estate | 2025 |
| Pump House Theatre and Arts Trust Limited (the) | Arts & recreation | 1973 |
| Pumpkin House Limited | Wholesale & retail | 2025 |
| Pumps Ventures Ltd | Wholesale & retail | 2025 |
| Pumpsmart Limited | Wholesale & retail | 2011 |
| PUP Limited | Real estate | 2020 |
| Pupa Services Ltd | Wholesale & retail | 2011 |
| Purcell School(The) | Education | 1963 |
| Purcla Limited | Real estate | 2012 |
| Purcom Consulting Limited | Administrative & support | 2007 |
| Pure & Unblemished Ltd | Extraterritorial | 2020 |
| Pure Carpet and Sofa Cleaning Limited | Administrative & support | 2025 |
| Pure Design Ltd | Construction | 2025 |
| Pure Embrace Ltd | Wholesale & retail | 2025 |
| Pure Energi Limited | Information & communication | 2000 |
| Pure Investment Property Ltd | Real estate | 2023 |
| Pure Invt Ltd | Professional & scientific | 2020 |
| Pure Music Management Limited | Information & communication | 2006 |
| Pure Plum PROPERTY1 Ltd | Real estate | 2017 |
| Pure Vice Ltd | Wholesale & retail | 2026 |
| Pureglow Cleaning Co Ltd | Administrative & support | 2026 |