| Power of Idea Limited | Information & communication | 2025 |
| Power Performance London Ltd | Transport & logistics | 2016 |
| Power Rangers Electrical Limited | Construction | 2023 |
| Power Recruitment Solutions SW Ltd | Administrative & support | 2026 |
| Power Rowlands Training Limited | Information & communication | 2026 |
| Power Source General Trading Limited | Wholesale & retail | 2025 |
| Power UP Fitness Ltd. | Education | 2023 |
| Power Wise Systems (UK) Limited | Manufacturing | 2003 |
| Power-Lec Building Services Ltd | Construction | 2024 |
| Powerbrain Solutions Ltd | Information & communication | 2019 |
| Powered by Elevate Ltd | Other services | 2022 |
| Powered by Ledwear Limited | Professional & scientific | 2011 |
| Powerfix Electrical Limited | Construction | 2026 |
| Powerful Root Ltd | Wholesale & retail | 2024 |
| Powerfull Electrical Ltd. | Construction | 2021 |
| Powerfullypure Trading Limited | Health & social care | 2025 |
| Powerhouse Cars Limited | Wholesale & retail | 2019 |
| Powerline CTG Ltd | Wholesale & retail | 2025 |
| Powermaps Ltd | Professional & scientific | 2013 |
| Powerplay by Untapped Ltd | Information & communication | 2021 |
| Powerpools (Carmarthen) Limited | Wholesale & retail | 2020 |
| Powerpost Marketing Limited | Professional & scientific | 2016 |
| Powerprong Ltd | Administrative & support | 2020 |
| Powerprops Ltd | Information & communication | 2016 |
| Powerscourt Property Ltd | Real estate | 2021 |
| Powertech Auto Services Ltd | Wholesale & retail | 2020 |
| Powerwired Ltd | Construction | 2025 |
| Powles Radiology Reporting Ltd | Health & social care | 2022 |
| Powys Construction Limited | Construction | 2021 |
| Poyraz London Limited | Wholesale & retail | 2019 |
| PP LND Ltd | Arts & recreation | 2018 |
| PP London Recruitment Limited | Administrative & support | 2019 |
| PP Security Ltd | Administrative & support | 2025 |
| PPA Consulting Ltd | Professional & scientific | 2015 |
| PPA Engineering Group Ltd | Manufacturing | 2019 |
| PPC Healthcare Services Limited | Administrative & support | 2018 |
| Ppcl Holdings Limited | Professional & scientific | 2017 |
| PPF QA Limited | Financial services | 2019 |
| PPF QCA Limited | Financial services | 2022 |
| PPG Macro Limited | Financial services | 2020 |
| PPI Gary Limited | Professional & scientific | 2017 |
| PPJ Group Limited | Households | 2020 |
| PPM Expertise Ltd | Real estate | 2025 |
| PPM Locksmiths Limited | Administrative & support | 2002 |
| PPM Renewables Limited | Construction | 2023 |
| Ppmt Technologies Limited | Professional & scientific | 2014 |
| Ppmv Holdings Ltd | Financial services | 2022 |
| PPO Recruitment Ltd | Administrative & support | 2020 |
| PPP Logistics Services Limited | Transport & logistics | 2024 |
| PPR Housing Ltd | Real estate | 2025 |
| PPR Limited | Real estate | 2001 |
| Ppsa Limited | Education | 2010 |
| Ppsm Holdings Ltd | Financial services | 2020 |
| PPT Change Management & Consultancy Ltd | Professional & scientific | 2015 |
| PPW Consultancy Limited | Professional & scientific | 2012 |
| Ppwr Copilot Ltd | Administrative & support | 2025 |
| PQM Services Limited | Manufacturing | 2016 |
| PR Accountancy Ltd | Professional & scientific | 2022 |
| PR Electrical Solutions Limited | Construction | 2022 |
| PR Finance Outsourcing Ltd | Professional & scientific | 2024 |
| PR Innovations Ltd | Hospitality | 2011 |
| PR Points Fitters Limited | Transport & logistics | 2018 |
| PR RGN Ltd | Health & social care | 2018 |
| PR S7VEN Limited | Wholesale & retail | 2025 |
| Practical HR Solutions Ltd | Professional & scientific | 2011 |
| Practical Learn Ltd | Education | 2024 |
| Practical Planet Saving Solutions Limited | Wholesale & retail | 2020 |
| Practical School Ltd | Education | 2024 |
| Practical Services (UK) Ltd | Transport & logistics | 2018 |
| Practice Autopilot Ltd | Administrative & support | 2022 |
| Practice NET Limited | Information & communication | 1965 |
| Practice Professionals Ltd | Administrative & support | 2011 |
| Practiceopolis Ltd | Professional & scientific | 2023 |
| Practise What YOU Breach Limited | Information & communication | 2019 |
| Prad Glass Limited | Construction | 2013 |
| Pradeep Ruhela Ltd | Wholesale & retail | 2025 |
| Pradiso Realty Ltd | Real estate | 2019 |
| Pragmacert Ltd | Professional & scientific | 2025 |
| Praia Wellness Ltd | Health & social care | 2025 |
| Praise Healthcare Recruitment Ltd | Public administration | 2022 |
| Praise Psalm Cleaners Ltd | Administrative & support | 2025 |
| Prajapati Consulting Ltd | Health & social care | 2022 |
| Prajapati Investments Ltd | Real estate | 2025 |
| Pranaav Technologies Limited | Professional & scientific | 2007 |
| Pras Tech Solutions Ltd | Information & communication | 2025 |
| Prashant Singh Ltd | Wholesale & retail | 2025 |
| Praskozorje Agency Ltd | Professional & scientific | 2024 |
| Pratham Software Ltd | Information & communication | 2007 |
| Prats Power Limited | Professional & scientific | 2025 |
| Pratt London Limited | Manufacturing | 2016 |
| Praviona Ltd | Wholesale & retail | 2025 |
| Praxis Change Ltd | Information & communication | 2020 |
| PRD Business Ltd | Other services | 2025 |
| PRD Group Ltd | Financial services | 2026 |
| Pre-Venge Limited | Information & communication | 2015 |
| Prebro Ltd | Information & communication | 2021 |
| Precamber Ltd | Arts & recreation | 1955 |
| Precedent Technologies Ltd | Information & communication | 2023 |
| Precep Investment Company Limited | Other services | 2014 |
| Precious Move Ltd | Health & social care | 2012 |