| Project Finland Topco Limited | Financial services | 2016 |
| Project Golden Homes Limited | Construction | 2022 |
| Project Investments Limited | Hospitality | 2023 |
| Project JIU Jitsu NW Ltd | Arts & recreation | 2022 |
| Project Noah Ltd | Professional & scientific | 2025 |
| Project North Ltd | Construction | 2026 |
| Project SIX Pillars Ltd | Administrative & support | 2017 |
| Project SY12 CIC | Wholesale & retail | 2023 |
| Project Virtus Ltd | Wholesale & retail | 2023 |
| PROJECT101 Limited | Wholesale & retail | 2025 |
| Projectco 2024 Limited | Financial services | 2024 |
| Projectco SUB 2024 Limited | Real estate | 2024 |
| Projectec Engineering Ltd | Professional & scientific | 2022 |
| Prolead Contracting Ltd | Information & communication | 2011 |
| Proleeds Ltd | Information & communication | 2022 |
| Prolink Coordinated Facilites Solution Ltd | Real estate | 2024 |
| Prolink Renovations Ltd | Construction | 2024 |
| Promatick Ltd | Administrative & support | 2023 |
| Promax Cleaning Service Ltd | Administrative & support | 2025 |
| Promedix Labs Ltd | Professional & scientific | 2024 |
| Promethean Group Ltd | Information & communication | 2025 |
| Promexic Ltd | Administrative & support | 2013 |
| Prominence Business Solutions Limited | Professional & scientific | 2014 |
| Prominence Services UK Limited | Professional & scientific | 2023 |
| Prominence Technology & Finance Ltd | Energy | 2002 |
| Promise 24 Seven Limited | Health & social care | 2014 |
| Promise Bears Ltd | Wholesale & retail | 2025 |
| Promise Consults Ltd | Wholesale & retail | 2025 |
| Promon Ltd | Wholesale & retail | 2021 |
| Promotech (Bolton) Limited | Wholesale & retail | 2011 |
| Prop Care (NW) Ltd | Administrative & support | 2026 |
| Propco 2 Ltd | Real estate | 2022 |
| Propconsult Ltd | Real estate | 2020 |
| Propel Actor Training Ltd | Arts & recreation | 2013 |
| Propel Ecommerce Ltd | Professional & scientific | 2026 |
| Proper Ltd | Financial services | 2024 |
| Proper Security Limited | Construction | 2020 |
| Properg Ltd | Real estate | 2020 |
| Properise Ltd | Real estate | 2025 |
| Properkey Properties Limited | Real estate | 2023 |
| Properties ADE 1 Limited | Real estate | 2022 |
| Properties ADE 2 Ltd | Real estate | 2022 |
| Properties ADE 3 Limited | Real estate | 2022 |
| Properties ADE 4 Limited | Real estate | 2022 |
| Properties ADE 5 Limited | Real estate | 2022 |
| Properties ADE 6 Limited | Real estate | 2022 |
| Properties ADE 7 Limited | Real estate | 2024 |
| Properties ADE Limited | Real estate | 2022 |
| Properties by P&P Limited | Real estate | 2026 |
| Properties for US Ltd | Real estate | 2018 |
| Property 2 Life Ltd | Financial services | 2024 |
| Property Avenue Trading Ltd | Real estate | 2025 |
| Property Bolton Ltd | Real estate | 2018 |
| Property Capital Limited | Real estate | 2006 |
| Property Dealer Ltd | Real estate | 2018 |
| Property Design & Acquisitions Ltd | Construction | 2024 |
| Property Development Experts Limited | Real estate | 2017 |
| Property Doctor SPV Ltd | Real estate | 2025 |
| Property Investor Assets Limited | Real estate | 2020 |
| Property Matters (Chorley) Limited | Financial services | 2001 |
| Property Mindset Ltd | Professional & scientific | 2026 |
| Property Partnership Programme Ltd | Professional & scientific | 2025 |
| Property People (N W) Limited | Real estate | 2003 |
| Property R US Ltd | Construction | 2025 |
| Property Sector Services Ltd | Real estate | 2018 |
| Property Services Northwest Ltd | Administrative & support | 2021 |
| Property Smith Investments Limited | Real estate | 2016 |
| Property-Fixx Ltd | Households | 2018 |
| Propertycompany Limited | Real estate | 2026 |
| Propharma Auditing Limited | Administrative & support | 2016 |
| Prophet Entertainment Group Ltd | Arts & recreation | 2025 |
| Prophetic Healing Ltd | Health & social care | 2024 |
| Prophius Ltd | Information & communication | 2020 |
| Propipeheating Ltd | Construction | 2025 |
| Propiry Ltd | Real estate | 2024 |
| Proplandia Estates Ltd | Construction | 2026 |
| Proprietary 1 Limited | Extraterritorial | 2020 |
| Prorigo Software Limited | Information & communication | 2023 |
| Prorobotics Limited | Administrative & support | 2014 |
| Proscan NDT Limited | Professional & scientific | 2023 |
| Prospat Limited | Information & communication | 2019 |
| Prospect Connect Limited | Administrative & support | 2017 |
| Prospect Consulting Ltd | Construction | 2022 |
| Prospect Living C.I.C. | Administrative & support | 2023 |
| Prospect REC Ltd | Administrative & support | 2024 |
| Prosper Multi Academy Trust | Education | 2016 |
| Prospero Legal and Business Solutions Limited | Professional & scientific | 2024 |
| Prosser Safety Consultants Limited | Professional & scientific | 2003 |
| Prosurance Solutions Ltd | Information & communication | 2017 |
| Prosys Computing Limited | Information & communication | 1990 |
| Protectafile Ltd | Manufacturing | 2020 |
| Protecting Animals With Schools Limited | Education | 2024 |
| Protection Security Limited | Administrative & support | 2024 |
| Protective Coating Solutions Limited | Construction | 2008 |
| Protective Insights Ltd | Administrative & support | 2025 |
| Protecto K9 Security Limited | Administrative & support | 2025 |
| Protive Construction Services Ltd | Professional & scientific | 2020 |
| Proto Dsgn Limited | Professional & scientific | 2025 |
| Protocom Ltd | Construction | 2024 |
| Protostar Ltd | Wholesale & retail | 2026 |