| Pleeseshakes Limited | Manufacturing | 2018 |
| Plmason Limited | Real estate | 2024 |
| Plot F, Springfield Village Management Company Limited | Households | 2023 |
| Plot G, Springfield Village Management Company Limited | Households | 2023 |
| Plot P&Q, Springfield Village Management Company Limited | Households | 2023 |
| Plowright Holdings Ltd | Real estate | 2025 |
| Plumrose Limited | Extraterritorial | 1949 |
| Plutus Financial Sevices Ltd | Professional & scientific | 2012 |
| PM Digitronics Ltd | Information & communication | 2010 |
| Pmca Limited | Professional & scientific | 2011 |
| Pmme Ltd | Professional & scientific | 2024 |
| Pmps Consulting Ltd | Professional & scientific | 2013 |
| Pmse Distribution Limited | Construction | 2024 |
| Pmse Holdings Limited | Real estate | 2019 |
| Pmse London Ltd | Real estate | 2020 |
| Pmse Property Investments Ltd | Real estate | 2018 |
| Pmse Real Estate Limited | Real estate | 2024 |
| PNS Ventures 2 Limited | Arts & recreation | 2024 |
| PNS Ventures Limited | Wholesale & retail | 2023 |
| Pnsc Limited | Health & social care | 2016 |
| Poalsons Enterprise Ltd | Wholesale & retail | 2026 |
| POD Building and Landscaping Limited | Construction | 2012 |
| POD People (UK) Limited | Administrative & support | 2008 |
| Pod-Trak (Holdings) Limited | Professional & scientific | 2012 |
| Pod-Trak Energy Solutions Limited | Construction | 2025 |
| Pod-Trak Limited | Construction | 2007 |
| Pod-Trak Networks Limited | Construction | 2013 |
| Pod-Trak Plant Limited | Construction | 2013 |
| Poesia Cruise Limited | Transport & logistics | 2025 |
| Pokita Ltd | Wholesale & retail | 2020 |
| Polikai Onriyam | Public administration | 2016 |
| Polish International Movers Ltd | Transport & logistics | 2024 |
| Polish MAN & Van - Removals and Storage Ltd | Transport & logistics | 2023 |
| Polish MAN and Van Ltd | Transport & logistics | 2017 |
| Polish Waste Movers Ltd | Water & waste | 2023 |
| Polski Supermarket London Limited | Wholesale & retail | 2019 |
| Polymer in Stock Limited | Wholesale & retail | 2020 |
| Pome Ltd | Hospitality | 2021 |
| Ponnuraj Properties Limited | Real estate | 2026 |
| POP the Q Proposals and Events Ltd | Hospitality | 2025 |
| Poplars Residents Association Limited(The) | Households | 1974 |
| Poppy Nursing and Care Services Ltd | Administrative & support | 2014 |
| Porr Slovakia Ltd | Financial services | 2016 |
| Porr UK Ltd | Construction | 2015 |
| Porsche Torque Ltd | Wholesale & retail | 2011 |
| Portalia Real Estate Ltd | Real estate | 2024 |
| Portcullis Site Security Limited | Administrative & support | 2025 |
| Portmans Decorators Limited | | 1987 |
| Portobello Realty Group Limited | Real estate | 2024 |
| Portsmouth Court Freehold Company Limited | Households | 2020 |
| POS Central Limited | Information & communication | 2024 |
| Poseidon Plumbing & Heating Care Limited | Construction | 2013 |
| Positive Global Ltd | Other services | 2012 |
| Posture Perfect Limited | Health & social care | 2006 |
| Pouyesh Limited | Education | 2008 |
| POW TV Ltd | Information & communication | 2019 |
| Powar Enterprise Solutions Ltd | Construction | 2015 |
| Power British Investments Limited | Real estate | 2021 |
| Power British Limited | Manufacturing | 2010 |
| Power Business Management Limited | Construction | 2003 |
| Power Plus Services Ltd | Manufacturing | 2023 |
| Powerduel Limited | Real estate | 2003 |
| Powerful Concepts Ltd | Information & communication | 2024 |
| Powergrass UK Limited | Administrative & support | 2017 |
| Powergreen Energy Services Limited | Professional & scientific | 2015 |
| Powton and Co Services Ltd | Information & communication | 2022 |
| PP Developments Limited | Real estate | 2020 |
| Ppav Limited | Information & communication | 2011 |
| PPF Construction Ltd | Construction | 2025 |
| PPI Recruitment Ltd | Administrative & support | 2009 |
| PPV BS Limited | Wholesale & retail | 2025 |
| PR Solutions Limited | Professional & scientific | 2025 |
| Praba Property Limited | Real estate | 2025 |
| Prabh UK Transport Ltd | Transport & logistics | 2019 |
| Prabhakar Investments Limited | Real estate | 2018 |
| Praiza Care Limited | Health & social care | 2021 |
| Prancing Pony Holdings Limited | Financial services | 2023 |
| Pranda U.K. Limited | Wholesale & retail | 1993 |
| Pratts (Long Lane) | Real estate | 1959 |
| Prebend Express Ltd | Wholesale & retail | 2018 |
| Precision Ballistics Ltd | Manufacturing | 2021 |
| Preddon LEE Limited | Other services | 2011 |
| Prehabpro Performance Ltd | Other services | 2023 |
| Premia Holdings Ltd | Wholesale & retail | 2018 |
| Premier Couriers Nationwide Ltd | Transport & logistics | 2023 |
| Premier Executive Travel Limited | Wholesale & retail | 2017 |
| Premier Homes International Ltd | Administrative & support | 2005 |
| Premier Law Solicitors Ltd | Professional & scientific | 2025 |
| Premier People Recruitment Ltd | Administrative & support | 2004 |
| Premier Property Cowley Road Limited | Real estate | 2022 |
| Premier Services International Ltd | Administrative & support | 2010 |
| Premier Tickets Limited | Information & communication | 2024 |
| Premier Vision Care Limited | Health & social care | 2019 |
| Premii Ltd | Wholesale & retail | 2026 |
| Premium Car Services Ltd | Administrative & support | 2022 |
| Premium Emart Limited | Wholesale & retail | 2025 |
| Premium Home Renovations Ltd | Construction | 2016 |
| Premium Mortgage Services Ltd | Financial services | 2024 |
| Premiumfix Ltd | Construction | 2019 |
| Prenew Phones Ltd | Wholesale & retail | 2024 |