| PJM Developments (London) Ltd | Real estate | 2023 |
| PJM Installations (London) Ltd | Construction | 2016 |
| Pjwfc Limited | Hospitality | 2024 |
| Pjwwc Limited | Hospitality | 2025 |
| PK Fried Chicken Ltd | Hospitality | 2026 |
| PK Moore Recruitment Ltd | Administrative & support | 2025 |
| PK Property Investor Ltd | Real estate | 2019 |
| PKM Medics Ltd | Administrative & support | 2019 |
| Pkpd Limited | Construction | 2004 |
| Place Marketing Ltd | Hospitality | 2012 |
| Plaistow Lane Management Services Ltd | Households | 2022 |
| Plan 28 | Manufacturing | 2011 |
| Plan IT Group Limited | Manufacturing | 2003 |
| Plane Construction Limited | Construction | 2015 |
| Planet Computers Limited | Manufacturing | 2016 |
| Planet Hoop Ltd | Other services | 2023 |
| Planning Property Services Ltd | Professional & scientific | 2023 |
| Plant Based Flavours Ltd | Hospitality | 2023 |
| Plantazia Limited | Administrative & support | 2000 |
| Plantcurious Limited | Hospitality | 2017 |
| Plastopaint Ltd | Construction | 2013 |
| Platform Services Limited | Real estate | 2015 |
| Platinium Builders Limited | Construction | 2017 |
| Platinum Flat Roofing Ltd | Construction | 2026 |
| Platinum Pool Service Ltd | Professional & scientific | 2018 |
| Playgroup Ventures Limited | Information & communication | 2017 |
| Pleasantly Limited | Health & social care | 1984 |
| PLM Media Limited | Information & communication | 2007 |
| Plumbher Ltd | Construction | 2026 |
| Pluris Tech Ltd | Information & communication | 2017 |
| Plus One Music Limited | Arts & recreation | 2009 |
| Plush Sales & Licensing Ltd | Wholesale & retail | 2015 |
| Pluto One Limited | Construction | 2019 |
| Plutus Commerce Ltd | Wholesale & retail | 2024 |
| Plutus International Ltd | Manufacturing | 2023 |
| PM Vision Consulting Limited | Professional & scientific | 2023 |
| PMW Properties Limited | Real estate | 2017 |
| PNB Holdings Limited | Financial services | 2022 |
| Pneuma Art Ltd | Other services | 2023 |
| PNT Europe Consulting Limited | Administrative & support | 2018 |
| PNT Europe Investments Limited | Real estate | 2015 |
| Pntcb Healthcare UK Ltd | Other services | 2015 |
| Poached Bromley Ltd | Hospitality | 2022 |
| Pobvacu Co., Ltd | Extraterritorial | 2018 |
| Podge Events Limited | Arts & recreation | 2013 |
| Poetica Ltd | Information & communication | 2025 |
| Point Edge Ltd | Information & communication | 2021 |
| Pointblanc Limited | Information & communication | 2025 |
| Polarising Consulting Limited | Information & communication | 2019 |
| Polatoglu Metal Limited | Construction | 2019 |
| Polirom Ltd | Administrative & support | 2023 |
| Polish Cuisine Ltd | Hospitality | 2025 |
| Polish Local Plumber Ltd | Construction | 2023 |
| Polished Projects Limited | Professional & scientific | 2024 |
| Polkaspots Limited | Information & communication | 2005 |
| Polo Market (UK) Ltd | Construction | 2014 |
| Pond Group Limited | Wholesale & retail | 1999 |
| Pond Netsite Limited | Professional & scientific | 2000 |
| Pond Recruit Ltd | Administrative & support | 2017 |
| Pond Solutions Limited | Professional & scientific | 2000 |
| Pony & Panda Bilingual Education Ltd | Education | 2018 |
| Poolbeg Investments Limited | Construction | 2018 |
| Poolman Ltd | Extraterritorial | 2025 |
| Pope Property Projects Ltd | Construction | 2018 |
| Popsey Coffee Ltd | Hospitality | 2022 |
| Pop’Ology London Ltd | Wholesale & retail | 2025 |
| Porcellus Management Ltd | Real estate | 2021 |
| Porcupine Project Services Ltd | Professional & scientific | 2025 |
| Porters Wood House (ST Albans) RTM Company Limited | Real estate | 2023 |
| Porthcawe Ltd | Real estate | 2018 |
| Portlane Express Co., Ltd | Wholesale & retail | 2025 |
| Portmanor House (SE25) RTM Company Ltd | Households | 2024 |
| Portside Exports Ltd | Wholesale & retail | 2024 |
| Portunus Building (London) RTM Company Limited | Real estate | 2018 |
| Posse Motorcycles Limited | Transport & logistics | 2025 |
| Post Grad Pads Ltd | Real estate | 2015 |
| Posthaus London Ltd | Information & communication | 2023 |
| Potato Streams Ltd | Information & communication | 2022 |
| Potential to BE Ltd | Administrative & support | 2016 |
| Powell Court RTM Company Limited | Households | 2024 |
| Powell I.P. Limited | Administrative & support | 2013 |
| Power From Potential Ltd. | Health & social care | 2018 |
| Power in People Ltd | Professional & scientific | 2024 |
| Power of Power Publishing Ltd | Information & communication | 2025 |
| Power Point Electrical Ltd. | Construction | 1998 |
| Powerbox (Beckenham) Limited | Arts & recreation | 2026 |
| Powerful MAG Company Limited | Health & social care | 2017 |
| Powerlete Ltd | Wholesale & retail | 2020 |
| Powers of Persuasion Limited | Professional & scientific | 2008 |
| Powley Property (Swanley) Limited | Real estate | 2020 |
| Powley Property Limited | Other services | 2018 |
| Powpow Productions Limited | Information & communication | 2014 |
| Pozitive Media Ltd | Extraterritorial | 2015 |
| PP Building Construction Ltd | Construction | 2024 |
| Ppap Property Limited | Real estate | 2020 |
| PPC Kingdom Ltd | Information & communication | 2024 |
| PPH Consultancy Services Limited | Professional & scientific | 2002 |
| PPP International Consultants Ltd | Financial services | 2020 |
| PR & DL Constructions Limited | Construction | 2014 |
| PR Commercial Services Ltd | Real estate | 2015 |