| Prime Oak Developments Ltd | Construction | 2019 |
| Prime Plastering Limited | Construction | 2015 |
| Prime UK Homes Ltd | Real estate | 2022 |
| Primehaven Global Ltd | Wholesale & retail | 2025 |
| Primelife Supported Living Limited | Health & social care | 2026 |
| Primus IT Consultancy Ltd | Information & communication | 2017 |
| Prince Serendipity Limited | Extraterritorial | 1985 |
| Print IT for ME Ltd | Wholesale & retail | 2025 |
| PRINT7 City Limited | Manufacturing | 2010 |
| Printing Portal Limited | Manufacturing | 2015 |
| Prior Electrical Limited | Construction | 2023 |
| Priority Design & Installation Ltd | Construction | 2018 |
| Priority Plumbing & Heating Services Ltd | Construction | 2016 |
| Priscilla Bamgbose Limited | Information & communication | 2015 |
| Prisma Construction Ltd | Construction | 2020 |
| Prisma Recruitment Limited | Administrative & support | 1988 |
| Pristine Pro Ltd | Administrative & support | 2024 |
| Privatas Ltd | Transport & logistics | 2024 |
| Private Ambulance Hire Ltd | Administrative & support | 2020 |
| Private Equity Recruitment Ltd | Administrative & support | 1986 |
| Prive Vision Ltd | Information & communication | 2019 |
| Privilege PHA Limited | Manufacturing | 2012 |
| Prmdc Limited | Administrative & support | 2025 |
| PRN Management Limited | Professional & scientific | 2022 |
| PRN Pumps Ltd | Construction | 2026 |
| Pro Builders London Ltd | Construction | 2025 |
| Pro Film Security Ltd | Administrative & support | 2025 |
| Pro Futures Soccer Schools Limited | Arts & recreation | 2006 |
| Pro Futures Sports & Physical Education Ltd | Education | 2014 |
| Pro R & G Ltd | Construction | 2026 |
| Pro R & I Ltd | Construction | 2025 |
| Pro Roofing & Guttering Ltd | Construction | 2025 |
| Pro Roofing Installations Ltd | Construction | 2024 |
| Pro Soccer Centres Limited | Arts & recreation | 2021 |
| Pro UK Education Limited | Professional & scientific | 2024 |
| Pro UK Property Limited | Real estate | 2024 |
| Pro-Mind Resourcing Limited | Extraterritorial | 2023 |
| Pro-Plumb London Services Ltd | Construction | 2024 |
| Pro-Point Fire and Security Ltd | Construction | 2022 |
| Proact Solutions Limited | Professional & scientific | 2002 |
| Proactive Project Officer Limited | Other services | 2016 |
| Prochoice Ltd | Extraterritorial | 2006 |
| Prockter Properties Limited | Real estate | 2018 |
| Proclaim Ltd | Extraterritorial | 2006 |
| Procote Ltd | Construction | 2011 |
| Production Trunk Limited | Professional & scientific | 2012 |
| Profind Ltd | Extraterritorial | 2006 |
| Profit From Order Ltd | Information & communication | 2008 |
| Progran Health Limited | Manufacturing | 2022 |
| Progressive Gaming Developers Ltd | Information & communication | 2023 |
| Progressive Glass Partitions Limited | Construction | 2021 |
| Project S.E.C Limited | Administrative & support | 2020 |
| Project Vocal Ltd | Education | 2025 |
| Promedia Consulting Limited | Information & communication | 2004 |
| Promind Logistics Limited | Construction | 2018 |
| Proper Music Distribution Limited | Wholesale & retail | 1993 |
| Proper Music Publishing Limited | Administrative & support | 1999 |
| Proper Networks Limited | Information & communication | 2007 |
| Proper Note Limited | Extraterritorial | 2009 |
| Proper Records Limited | Information & communication | 1995 |
| Propermusic.Com Limited | Information & communication | 2011 |
| Properties K Ltd | Real estate | 2024 |
| Properties SAK Limited | Real estate | 2019 |
| Property Alliance London Ltd | Financial services | 2023 |
| Property Cloud Ltd | Real estate | 2021 |
| Property Investments Global Ltd | Real estate | 2022 |
| Property IS Limited | Real estate | 2004 |
| Property King & DEO Developments Ltd | Real estate | 2023 |
| Property King & Rungien Developments Ltd | Real estate | 2025 |
| Property King Developments Ltd | Real estate | 2021 |
| Property King Kent Limited | Real estate | 2017 |
| Property Lord Estates Ltd | Real estate | 2017 |
| Property Wealth Invest Limited | Real estate | 2021 |
| Property Xchange Limited | Administrative & support | 2021 |
| Propertypod Ltd | Real estate | 2021 |
| Propertyresponsegroup Ltd | Construction | 2020 |
| Propko Ltd | Construction | 2023 |
| Prosmelt Limited | Professional & scientific | 2015 |
| Prospero Compliance Solutions Ltd | Administrative & support | 2019 |
| Prostruct Designs Ltd | Professional & scientific | 2022 |
| Protask Limited | Construction | 2004 |
| Protocol Business Communications Ltd | Information & communication | 2000 |
| Protocol Labs Limited | Hospitality | 2025 |
| Protogy Limited | Professional & scientific | 2009 |
| Prototec Property Co Ltd | Real estate | 2025 |
| Prototec Security Limited | Administrative & support | 2017 |
| Proud One Ltd | Real estate | 2024 |
| Proudtech Projects Ltd | Energy | 2026 |
| Proventis Corporate Services Ltd | Professional & scientific | 2024 |
| PS Properties (UK) Limited | Real estate | 2011 |
| PS Quick Stop Limited | Wholesale & retail | 2025 |
| PS Virtual Assistants Limited | Administrative & support | 2014 |
| Ps&Ck Properties Ltd | Real estate | 2022 |
| PS72 Ltd | Real estate | 2025 |
| PSB Services (Southern) Limited | Administrative & support | 2014 |
| PSE Build Ltd | Construction | 2018 |
| PSM Accountancy Limited | Professional & scientific | 2020 |
| PSN & Sons Properties Ltd | Construction | 2025 |
| PSS Consultancy Ltd | Real estate | 2018 |
| Psychcare Online Ltd | Real estate | 2020 |