| Plumbtech Property Services Ltd | Construction | 2026 |
| Plusb Ltd | Other services | 2020 |
| PM Specialist Builders (London) Limited | | 1973 |
| PMC Alumni UK CIC | Other services | 2023 |
| PMD Mortgage Services Limited | Financial services | 2020 |
| Pmsc Holdings Ltd | Professional & scientific | 2022 |
| PN Patel & Co Limited | Wholesale & retail | 2024 |
| Pnac Services Limited | Administrative & support | 2012 |
| Poditrade Limited | Other services | 2009 |
| Polbath Ltd | Construction | 2008 |
| Polymorphic Tech Ltd | Education | 2026 |
| Polymorphous Publishing Ltd | Information & communication | 2021 |
| Popbit Ltd | Information & communication | 2023 |
| Poplar Carpentry and Joinery Ltd | Manufacturing | 2022 |
| Portland Decorating Surrey Ltd | Construction | 2018 |
| Portsoken Properties Ltd | Real estate | 2011 |
| Poshmeup Limited | Wholesale & retail | 2020 |
| Positive Moves IT Limited | Information & communication | 2012 |
| Positive Projections Ltd | Wholesale & retail | 2016 |
| Possible Avenue Ltd | Real estate | 2022 |
| Post Machine Ltd | Information & communication | 2017 |
| Postlanding Ltd | Professional & scientific | 2022 |
| Power on Installations Limited | Construction | 2008 |
| Power Paint Limited | Construction | 2024 |
| Powerpoint Electrics Limited | Wholesale & retail | 2000 |
| PP AR Limited | Hospitality | 2023 |
| Ppbh Ltd | Extraterritorial | 2025 |
| Ppet Global Ltd | Information & communication | 2022 |
| Ppiri Ltd | Hospitality | 2026 |
| PR Building London Ltd | Construction | 2014 |
| PR Design and Construction Ltd | Construction | 2025 |
| PR03CAF London Ltd | Construction | 2026 |
| PR2024 Ltd. | Professional & scientific | 2015 |
| Praba Machine CUT Ltd | Manufacturing | 2024 |
| Practical Edge Academy Limited | Education | 2026 |
| Practical Enterprises Limited | Extraterritorial | 1991 |
| Pramukhpharm Ltd | Wholesale & retail | 2022 |
| Prarambh Ltd | Information & communication | 2015 |
| Pratham Solutions Limited | Administrative & support | 2005 |
| Prats Private Limited | Professional & scientific | 2023 |
| Prbulleros Cardiac Screening Ltd | Health & social care | 2023 |
| Precision Ophthalmics Ltd | Administrative & support | 2022 |
| Precision Venetian Ltd | Construction | 2024 |
| Predator Pest Solutions Ltd | Administrative & support | 2012 |
| Predest Services and Solution Limited | Administrative & support | 2025 |
| Premetals Ltd | Water & waste | 2024 |
| Premier Homes Surrey Ltd | Construction | 2020 |
| Premier Installations (UK) Limited | Construction | 2007 |
| Premier Land and Developments Ltd | Real estate | 2003 |
| Premier London Building Projects Ltd | Construction | 2018 |
| Premier Trading GB Limited | Water & waste | 2005 |
| Premium Entertainment and Events Ltd | Hospitality | 2025 |
| Premium Property Estate Ltd | Real estate | 2023 |
| Prentice Finance Ltd | Financial services | 2016 |
| Prepstar Limited | Wholesale & retail | 2023 |
| Present Decoration & Maintenance Co. Ltd | Construction | 2023 |
| Presentto Limited | Hospitality | 2014 |
| Pressed Group Ltd | Other services | 2016 |
| Prestige Construction Management Limited | Construction | 2018 |
| Prestige Land Ltd | Real estate | 2021 |
| Prestige Luxury Developments Ltd | Construction | 2021 |
| Prestige Maison Ltd | Construction | 2026 |
| Prestige Pressure Cleaning Ltd | Administrative & support | 2024 |
| Prestige Realty Limited | Real estate | 2024 |
| Prestige Services London Limited | Administrative & support | 1995 |
| Prestige Services Surrey Limited | Administrative & support | 2018 |
| Pretty Panther Clothing Limited | Wholesale & retail | 2016 |
| PRG Developments Ltd | Real estate | 2022 |
| Prima Lofts Limited | | 2004 |
| Primatek Construction Ltd | Construction | 2016 |
| Prime and Naturals (Sutton) Limited | Health & social care | 2022 |
| Prime Choice Foods Limited | Wholesale & retail | 2026 |
| Prime Developments (Surrey) Ltd | Construction | 2014 |
| Prime Home Automation Ltd | Construction | 2025 |
| Prime Living Estates Limited | Real estate | 2022 |
| Prime Precision Dental Laboratory Ltd | Manufacturing | 2019 |
| Prime Provisions London Ltd | Wholesale & retail | 2026 |
| Prime Steps Services Ltd | Professional & scientific | 2022 |
| Prime Tyres Sutton Ltd | Wholesale & retail | 2026 |
| Prime Vinyl Prints Limited | Manufacturing | 2025 |
| Primecore Groundworks Ltd | Construction | 2026 |
| Primes Mart Ltd | Construction | 2021 |
| Primestone London Ltd | Manufacturing | 2025 |
| Principle Building and Decorating Services Limited | Construction | 2004 |
| Printing Capital Limited | Financial services | 2024 |
| Prisla Designs Limited | Professional & scientific | 2017 |
| Prism Epsom Limited | Professional & scientific | 2005 |
| Prism IT Consulting Limited | Professional & scientific | 2012 |
| Prismus Infotech Limited | Information & communication | 2016 |
| Prisoft Ltd | Information & communication | 2018 |
| Pristinears Ltd | Health & social care | 2025 |
| Private Cabs Ltd | Transport & logistics | 2026 |
| Private Genetics Clinics UK Limited | Health & social care | 2025 |
| Private Room Restaurant Ltd | Hospitality | 2021 |
| Privity Partners Ltd | Professional & scientific | 2023 |
| Prizelawn Developments Limited | Construction | 1992 |
| Pro-Paint Refinishing Ltd | Construction | 2022 |
| Pro-Tennis Consultancy Ltd | Arts & recreation | 2008 |
| Pro-Tools (UK) Limited | Construction | 1991 |
| Proagro Limited | Wholesale & retail | 1999 |