| Project Possible | Health & social care | 1998 |
| PROJECT242 Ltd | Real estate | 2024 |
| Projekt Consulting Ltd | Professional & scientific | 2013 |
| Prolife Physiotherapy Ltd | Health & social care | 2011 |
| Proline Construction Ltd | Construction | 2018 |
| Prolink (GB) Limited | Professional & scientific | 2006 |
| Promac Locksmiths UK Limited | Administrative & support | 2009 |
| Promo IT Solutions Ltd | Information & communication | 2014 |
| Promote People Global Limited | Information & communication | 2023 |
| Pronotix Solutions Ltd | Information & communication | 2022 |
| Properties by L & S Ltd | Real estate | 2021 |
| Property 2U Limited | Real estate | 2023 |
| Property BEE Limited | Real estate | 2018 |
| Property Electrical Limited | Manufacturing | 2015 |
| Property KJ Ltd | Construction | 2025 |
| Property Nerd Limited | Real estate | 2025 |
| Property Services Bucks Ltd | Real estate | 2024 |
| Property Solutions (HW) Limited | Real estate | 2026 |
| Propertyisland Ltd | Real estate | 2020 |
| Propsanddrops Ltd | Administrative & support | 2022 |
| Propshan Ltd | Real estate | 2023 |
| Prosanta Ltd | Wholesale & retail | 2024 |
| Prosolar Installations Ltd | Construction | 2022 |
| Prospect Environmental Planning Ltd | Construction | 2018 |
| Prospect Land & Property Ltd | Real estate | 2024 |
| Prospects Land Acquisitions Limited | Construction | 2005 |
| Prosper Infinity Limited | Construction | 2013 |
| Prospera Land Ltd | Real estate | 2024 |
| Prosperity Care Group Ltd | Health & social care | 2024 |
| Prospero Stock & Accounting Solutions Limited | Professional & scientific | 2011 |
| Prosure Solutions Limited | Financial services | 2012 |
| Protasys Limited | Information & communication | 2015 |
| Protect Property Gutters Ltd | Administrative & support | 2022 |
| Prototypic Labs Ltd | Information & communication | 2026 |
| Provent Solutions Ltd | Public administration | 2022 |
| PRS Property Services Ltd | Real estate | 2019 |
| Prudent Technical Production Limited | Information & communication | 2019 |
| PS Consultancy Limited | Information & communication | 2025 |
| PS Consultancy Services (UK) Ltd. | Professional & scientific | 2008 |
| Psag Technologies Ltd | Information & communication | 2021 |
| PSC Construction & Home Services Ltd | Construction | 2020 |
| Psdj Property Ltd | Real estate | 2021 |
| Psirbu Ltd | Construction | 2026 |
| PSV Glass & Glazing Limited | Transport & logistics | 2014 |
| PSV Glass LLP | | 2008 |
| Psvgg Properties Limited | Real estate | 2021 |
| PT & SB Property Ltd | Real estate | 2023 |
| PTW Consulting Limited | Professional & scientific | 2021 |
| PUB Locums Limited | Administrative & support | 1995 |
| Puffdaddyvapes Limited | Wholesale & retail | 2021 |
| Pukidesigns Ltd | Professional & scientific | 2019 |
| Pulse Engineering Limited | Manufacturing | 2007 |
| Pulsemap Ltd | Information & communication | 2021 |
| Pulzars Investment Projects Ltd | Real estate | 2025 |
| PUN Intended Marketing Limited | Information & communication | 2019 |
| Punk Industries Ltd | Professional & scientific | 2024 |
| Punnami Limited | Information & communication | 2009 |
| Pure & Co Cleaning Ltd | Administrative & support | 2026 |
| Pure Cross Media Limited Liability Partnership | | 2020 |
| Pure Glazing Solutions Limited | Construction | 2011 |
| Pure Technology (UK) Limited | Information & communication | 2003 |
| Puredigi Limited | Administrative & support | 1988 |
| Pureseal Ltd | Manufacturing | 2025 |
| Puring Ltd | Administrative & support | 2020 |
| Puritas Limited | Administrative & support | 2025 |
| Purnell Transformation Ltd | Professional & scientific | 2022 |
| Puroptima Limited | Extraterritorial | 2023 |
| Purple Consulting Ltd | Professional & scientific | 2002 |
| Purple Orange Properties Limited | Real estate | 2025 |
| Purple Orchid Property Investments Ltd | Households | 2023 |
| Purpose Health Limited | Administrative & support | 2021 |
| Purring Patch Ltd | Agriculture & fishing | 2025 |
| Pursuing Excellence Ltd | Information & communication | 2024 |
| Puzzlemetrics Limited | Information & communication | 2025 |
| Pvcj Management Ltd | Professional & scientific | 2014 |
| Pvcj Solutions Ltd | Administrative & support | 2014 |
| Pvpa Consultancy Limited | Administrative & support | 2018 |
| PW Advisory Ltd | Professional & scientific | 2025 |
| PWB Limited | Construction | 2019 |
| Pwmmc Consultancy Ltd | Information & communication | 2010 |
| PWP Heating & Electric Ltd | Construction | 2018 |
| Pyari Skin Limited | Other services | 2021 |
| Pygmalion Effects Ltd | Manufacturing | 2026 |
| Pyramid Electrical Solutions Ltd | Construction | 2019 |
| Pyramid Health & Fitness Limited | Arts & recreation | 2011 |
| Q & Y International Ltd | Wholesale & retail | 2011 |
| Q Corp Ltd | Information & communication | 2025 |
| Q&F Holdings Ltd | Real estate | 2023 |
| Q&Z Real Estate Ltd | Construction | 2022 |
| Q.S. Services Nationwide Limited | Professional & scientific | 2010 |
| Q2 Group International Limited | Administrative & support | 2022 |
| Q2 Investments Limited | Real estate | 2021 |
| Q2 Pharma Limited | Wholesale & retail | 2018 |
| Q2 Salon Ltd | Other services | 2017 |
| Qahef and SON Limited | Wholesale & retail | 2019 |
| Qahwa Imports Ltd | Wholesale & retail | 2025 |
| Qalam Enterprise Limited | Construction | 2020 |
| Qaralua Fashions Limited | Wholesale & retail | 2025 |
| Qard Al-Hasan Ltd | Health & social care | 2025 |
| Qaswa Sports Ltd | Wholesale & retail | 2025 |