| Primore Properties Ltd | Administrative & support | 2020 |
| Print Salford Ltd | Manufacturing | 2025 |
| Print-It Ltd | Information & communication | 2015 |
| Priors Hall Park Corby SPV Limited | Real estate | 2024 |
| Prismique Glidd Ltd | Wholesale & retail | 2025 |
| Prisyec Ltd | Health & social care | 2022 |
| Private Clouds Ltd | Information & communication | 2012 |
| Private White Limited | Financial services | 2017 |
| Private White VC Limited | Wholesale & retail | 2010 |
| Privatelink Limited | Real estate | 2003 |
| Privatelink Property Ltd | Real estate | 2005 |
| Privstar Limited | Wholesale & retail | 2018 |
| Prixell Limited | Information & communication | 2015 |
| Prize Consultants Ltd | Administrative & support | 2017 |
| PRM Productions Ltd | Information & communication | 2023 |
| Pro Active Environmental Services Limited | Water & waste | 2021 |
| Pro Active FM Limited | Other services | 2014 |
| Pro Business Consult Ltd | Professional & scientific | 2022 |
| Pro Fire Systems Manchester Ltd | Construction | 2021 |
| Proaid Health & Nutrition Ltd | Wholesale & retail | 2020 |
| Proassure Mortgage Solutions Limited | Financial services | 2013 |
| Probus Recruitment Ltd | Administrative & support | 2021 |
| Procaffeinated Ltd | Hospitality | 2020 |
| Procare 7 Limited | Administrative & support | 2020 |
| Prodent Solutions Ltd | Health & social care | 2026 |
| Prodigious Hands Ltd | Other services | 2018 |
| Profectus Town Planning Limited | Professional & scientific | 2024 |
| Professional Skills Academy | Education | 2014 |
| Profil-Property Limited | Real estate | 2012 |
| Profinder Limited | Professional & scientific | 2006 |
| Profinder Media Limited | Information & communication | 2012 |
| Proflex Massage Ltd | Arts & recreation | 2023 |
| Project Benevolence I Ltd | Extraterritorial | 2018 |
| Project Benevolence II Ltd | Other services | 2018 |
| Project Career Ltd | Information & communication | 2022 |
| Project Charisma Ltd | Administrative & support | 2022 |
| Project Consultancy Services Limited | Information & communication | 2021 |
| Project Delivery Partners Ltd | Information & communication | 2022 |
| Project Mango Limited | Professional & scientific | 2018 |
| Project Thor Bidco Limited | Financial services | 2023 |
| Project Thor Midco Limited | Financial services | 2023 |
| Project Thor Noteco Limited | Financial services | 2023 |
| Project Thor Topco Limited | Financial services | 2023 |
| Project Waterloo Bidco Limited | Financial services | 2020 |
| Project Winston Propco Limited | Financial services | 2019 |
| Projectmaster Home Specialists Ltd | Construction | 2024 |
| Prolific Global Properties Ltd | Real estate | 2025 |
| Promark Media Ltd. | Information & communication | 2013 |
| Promenaut AI Limited | Information & communication | 2026 |
| Promisedpharmaceutics Limited | Health & social care | 2018 |
| Promocean UK Ltd | Wholesale & retail | 2000 |
| Proofid Acquisition Ltd | Financial services | 2021 |
| Proofid Holdings Ltd | Financial services | 2021 |
| Proofid Investments Ltd | Financial services | 2021 |
| Proofid Limited | Information & communication | 2008 |
| Prop-Edge Limited | Information & communication | 2025 |
| PROPA4 Limited | Real estate | 2017 |
| Propack Plus Ltd | Wholesale & retail | 2018 |
| Propacle Homes Ltd | Real estate | 2025 |
| Propent Management Consultancy Ltd | Health & social care | 2015 |
| Proper Books Ltd | Professional & scientific | 2020 |
| Proper Protection Ltd | Administrative & support | 2022 |
| Proper Tilling Limited | Construction | 2025 |
| Properestates Ltd | Real estate | 2020 |
| Propergy Ltd | Professional & scientific | 2025 |
| Properties Northwest Ltd | Real estate | 2019 |
| Property Dispute Solutions Limited | Professional & scientific | 2025 |
| Property Doctor Group Limited | Construction | 2024 |
| Property for Life (London) Limited | Health & social care | 2019 |
| Property Improvement Surveys Ltd | Administrative & support | 2025 |
| Property Investment Nominees Ltd | Extraterritorial | 2002 |
| Property Management Manchester Ltd | Real estate | 2024 |
| Property Near ME Ltd | Real estate | 2022 |
| Property Partners & Brothers Ltd. | Real estate | 2025 |
| Property Plaza Limited | Real estate | 2019 |
| Property Wrap Ltd | Real estate | 2024 |
| Propertyology Limited | Real estate | 2020 |
| Proportion Productions Ltd. | Information & communication | 2015 |
| Propti Ltd | Real estate | 2024 |
| Propworld Investments Ltd | Real estate | 2025 |
| Prorend Tech Ltd | Construction | 2016 |
| Prosafe AI Limited | Information & communication | 2024 |
| Proshield Fire Engineering Limited | Hospitality | 2020 |
| Prospect Mill Estates Ltd | Construction | 2022 |
| Prospercap Subholdco Limited | Financial services | 2017 |
| Prospercap UK Management Services Ltd | Hospitality | 2015 |
| Prospero Caring Services (PCS) Ltd | Health & social care | 2022 |
| Prosquadz Ltd | Information & communication | 2026 |
| Protect My Products Limited | Other services | 2023 |
| Protego Group Limited | Financial services | 2003 |
| Proteus Training Ltd | Health & social care | 2023 |
| Protonix Limited | Other services | 2017 |
| Proud City Academy | Health & social care | 2012 |
| Provy Construction Services Limited | Construction | 2025 |
| Prowood Holdings Limited | Financial services | 2020 |
| Prowood Limited | Manufacturing | 1996 |
| Proximad Limited | Professional & scientific | 2015 |
| Prudens Ltd | Professional & scientific | 2018 |
| Prudent Ltd | Other services | 2015 |
| Prudhoe Property Estates Limited | Other services | 2023 |