| Primrose Hill Court Management Company Limited | Real estate | 2006 |
| Princess Impersonations Limited | Arts & recreation | 2015 |
| Princeton Grange Limited | | 1983 |
| Principal Energy Solutions Limited | Administrative & support | 2013 |
| Prineza Ltd | Wholesale & retail | 2026 |
| Prins & Booth Ltd | Other services | 2016 |
| Print Clothing Ltd | Manufacturing | 2025 |
| Print Find Limited | Manufacturing | 2006 |
| Print Rocket Ltd | Administrative & support | 2014 |
| Printer Wizard Limited | Wholesale & retail | 2014 |
| Printright (Oldham) Limited | Manufacturing | 2015 |
| Prints and Needles Ltd | Manufacturing | 2021 |
| Printserve PS Pro Ltd | Manufacturing | 2011 |
| Prismo Limited | Manufacturing | 2000 |
| Pristine Contracts Ltd | Administrative & support | 2025 |
| Pristine Solutions Ltd | Administrative & support | 2022 |
| Prius R US Ltd | Wholesale & retail | 2025 |
| Private Accommodations Marketing Ltd | Professional & scientific | 2022 |
| Private Property Finance Group Limited | Financial services | 2025 |
| PRN Research Ltd | Health & social care | 2021 |
| Pro Binary Ltd | Administrative & support | 2023 |
| Pro Esthe Ltd. | Wholesale & retail | 2017 |
| Pro Guard Security Limited | Administrative & support | 2014 |
| Pro Home Decor Ltd | Manufacturing | 2024 |
| Pro MAC Pave Contractors Ltd | Administrative & support | 2025 |
| Pro MAC Pave Ltd | Construction | 2021 |
| Pro Performance Group Ltd | Wholesale & retail | 2025 |
| Pro-Cam Systems Limited | Administrative & support | 2002 |
| Pro-Drive Motors Ltd | Wholesale & retail | 2026 |
| Pro-Fit Joinery Limited | Construction | 2017 |
| Pro-Service Group Ltd | Administrative & support | 2008 |
| Proactive Fire Ltd | Public administration | 2024 |
| Proactive Innovations Ltd | Extraterritorial | 2023 |
| PROB2B Limited | Education | 2010 |
| Probuild & Clean Ltd | Construction | 2025 |
| Producer Jones Ltd | Professional & scientific | 2025 |
| Production Stuff Ltd | Professional & scientific | 2014 |
| Profal Limited | Administrative & support | 1991 |
| Profal Property and Lettings Limited | Administrative & support | 2017 |
| Professional Chauffeur Services Ltd | Transport & logistics | 2025 |
| Professional Cleaning Solutions (NW) Ltd | Administrative & support | 2015 |
| Professional Computer Support Limited | Information & communication | 2017 |
| Professional Events Management Limited | Other services | 2002 |
| Professional Futures Limited | Professional & scientific | 2015 |
| Professional Teachers Ltd | Education | 2021 |
| Profileglue Ltd | Professional & scientific | 2015 |
| Profisourcing Ltd. | Information & communication | 2023 |
| Profit Driven Marketing Limited | Professional & scientific | 2021 |
| Profit Reality Ltd. | Real estate | 2006 |
| Profit Tyre Group Ltd | Wholesale & retail | 2019 |
| Profitall Ltd | Information & communication | 2022 |
| Profitmesh AI Limited | Wholesale & retail | 2025 |
| Profix Roofing & Groundworks Ltd | Construction | 2025 |
| Proflight-Ng Ltd. | Transport & logistics | 2024 |
| Progress Education Limited | Education | 2015 |
| Progress Education Trust Limited | Education | 2016 |
| Progress Pulse Consulting CIC | Professional & scientific | 2024 |
| Progress Tutors Limited | Education | 2021 |
| Progression Building Contractors (NW) Ltd | Administrative & support | 2017 |
| Project Africa Ltd | Financial services | 2024 |
| Project Consultancy & Management Ltd | Agriculture & fishing | 2004 |
| Project Interim Limited | Administrative & support | 2023 |
| Project KPI Holdco Limited | Financial services | 2024 |
| Project Painters Limited | Construction | 2026 |
| Project Paradise Property Ltd | Professional & scientific | 2019 |
| Project Solutions OL8 Ltd | Construction | 2025 |
| Projexa Technology Ltd | Information & communication | 2026 |
| Prolata Group Ltd | Professional & scientific | 2017 |
| Proline Components Limited | Manufacturing | 2004 |
| Proline Plumbing & GAS Ltd | Construction | 2025 |
| Prolivia Ltd | Real estate | 2020 |
| Promota Logo Ltd | Manufacturing | 2020 |
| Promotional Choice Limited | Administrative & support | 1997 |
| Prompt Pros Services Ltd | Transport & logistics | 2025 |
| Promptara AI Limited | Wholesale & retail | 2025 |
| Promptive AI Limited | Wholesale & retail | 2025 |
| Prop Share Hub Ltd | Real estate | 2023 |
| PROP181 Ltd | Administrative & support | 2008 |
| Propane Fitness Ltd. | Other services | 2011 |
| Propaw Consulting UK Ltd | Administrative & support | 2025 |
| Propeller Property Investments Ltd | Real estate | 2016 |
| Proper Desi UK Limited | Wholesale & retail | 2023 |
| Proper Tea (NW) Limited | Real estate | 2018 |
| Properties AZ Ltd | Real estate | 2025 |
| Properties AZF Ltd | Real estate | 2025 |
| Properties by JM Ltd | Real estate | 2024 |
| Properties Estate Ltd | Real estate | 2025 |
| Properties Holding Limited | Professional & scientific | 2015 |
| Properties Investment (NW) Ltd | Real estate | 2019 |
| Properties Investment MCR Ltd | Real estate | 2024 |
| Properties Under the Hammer Auctions (Nationwide) Ltd | Real estate | 2023 |
| Property FIX Driveways & Roofing Ltd | Construction | 2021 |
| Property Hub Specialist Ltd | Real estate | 2022 |
| Property Investment Consultants (GB) Limited | Real estate | 2006 |
| Property Locator Limited | Real estate | 2013 |
| Property Maintenance & Management Ltd | Real estate | 2021 |
| Property Movers Limited | Real estate | 2018 |
| Property Qubed Limited | Education | 2016 |
| Property Roost Ltd | Real estate | 2023 |
| Property Route Empire Ltd | Construction | 2024 |