| Pennymatters Limited | Professional & scientific | 2010 |
| Pentasync Solutions Ltd | Administrative & support | 2024 |
| People and Animal Wellbeing Services CIC | Education | 2020 |
| Peopledoc UK Ltd | Information & communication | 2015 |
| Peptrx Ltd | Wholesale & retail | 2025 |
| Perceptive EYE Limited | Real estate | 2013 |
| Peregrine Fortitude Ltd | Information & communication | 2017 |
| Perfect Lovely Limited | Manufacturing | 2016 |
| Perfection Elite Clean Limited | Water & waste | 2025 |
| Perfectly Human Ltd | Information & communication | 2013 |
| Perfecto Mobile UK Limited | Professional & scientific | 2013 |
| Perfecto Wayz Limited | Wholesale & retail | 2020 |
| Perforce Software UK Limited | Information & communication | 1999 |
| Performance Property & Development Limited | Real estate | 2016 |
| Performance Solutions 14 Limited | Professional & scientific | 2014 |
| Perilla Dining Ltd | Hospitality | 2014 |
| Perseuspartners Ltd | Administrative & support | 2014 |
| Persona.Florist Ltd | Wholesale & retail | 2025 |
| Peter Attwood Limited | Construction | 1997 |
| Petrow Harley Limited | Professional & scientific | 2011 |
| PFC ASH Limited | Real estate | 2008 |
| PFL UK Holdings Group Limited | Arts & recreation | 2025 |
| PFL UK Holdings Limited | Arts & recreation | 2023 |
| PGA Group Limited | Real estate | 2023 |
| PGR Cars Ltd | Wholesale & retail | 2010 |
| PGS Installations Limited | Construction | 1999 |
| Pharma Regulatory Affairs Consulting Ltd | Professional & scientific | 2010 |
| Phasera Limited | Agriculture & fishing | 2012 |
| PHE Consultants Ltd | Construction | 2020 |
| Pheonix Ecom Ltd | Wholesale & retail | 2025 |
| PHG Asset Holdings Ltd | Real estate | 2016 |
| Phil Turner Productions Ltd | Information & communication | 2003 |
| Philip Brennan Engineering Consultancy Ltd | Professional & scientific | 2020 |
| Phoenix Development Projects Ltd | Construction | 2026 |
| Phoenix Nature Ltd | Construction | 2024 |
| Phoenix Transformation Partners Ltd | Professional & scientific | 2025 |
| Phyllaac Limited | Administrative & support | 2019 |
| Pickndrop Logistics Limited | Transport & logistics | 2025 |
| Piec Investments Limited | Real estate | 2025 |
| Pillars Development Ltd | Real estate | 2024 |
| Pilon Construction Group Limited | Construction | 2009 |
| Pilon Limited | Construction | 2004 |
| Pilu Construction Ltd | Construction | 2019 |
| Pinewood Property Investments Ltd | Real estate | 2022 |
| Pink Pumpkin Design Ltd | Manufacturing | 2020 |
| Pinkblue Cleaning Services Limited | Administrative & support | 2023 |
| Pinnacle Location Services Limited | Information & communication | 2021 |
| Pinnacle Media Partnerships Limited | Professional & scientific | 2017 |
| Pinnocks Management Ltd | Professional & scientific | 2015 |
| Pinoy Nars Ltd | Professional & scientific | 2022 |
| Pioleaners Property Investment Ltd | Real estate | 2017 |
| Pioneer Clothing Ltd | Wholesale & retail | 2023 |
| Pioneer FM Ltd | Other services | 2016 |
| Pioneer Golf Limited | Wholesale & retail | 2024 |
| Pipehouse GIN Limited | Wholesale & retail | 2017 |
| Pipelinepro Limited | Information & communication | 2025 |
| Pirai Infotech Limited | Information & communication | 2019 |
| Pistachio Design Ltd | Administrative & support | 2008 |
| Pistis Property Investment Ltd | Real estate | 2019 |
| Pithos Limited | Professional & scientific | 2015 |
| Pittway Systems Technology Group Europe Limited | Administrative & support | 1988 |
| Pius Technologies Ltd | Information & communication | 2020 |
| PKD Finance Limited | Professional & scientific | 2019 |
| PKU Services Ltd | Construction | 2021 |
| Planforce Ltd | Professional & scientific | 2013 |
| Platform Perk Ltd | Hospitality | 2024 |
| Platinium Expedition Ltd | Transport & logistics | 2021 |
| Platinum Exterior Solutions Limited | Administrative & support | 2026 |
| Play Polo Limited | Arts & recreation | 2017 |
| Playball Camps Limited | Arts & recreation | 2021 |
| Playball Hammersmith Limited | Arts & recreation | 2017 |
| Playball Putney Limited | Arts & recreation | 2017 |
| Plough and Arrow Gastro PUB Ltd | Hospitality | 2023 |
| Plum Design & Publishing Ltd | Information & communication | 2013 |
| Plumb&Plumber Limited | Other services | 2013 |
| Plumbheat Group Ltd | Construction | 2018 |
| Plumbworld Installations Limited | Wholesale & retail | 2010 |
| Plumstead Consulting Limited | Administrative & support | 2008 |
| Plumstead Holdings Limited | Administrative & support | 2013 |
| Plus Kebabs Limited | Hospitality | 2019 |
| Pm-Net Limited | Information & communication | 2016 |
| Pmcollectablesuk Ltd | Wholesale & retail | 2026 |
| Pnmk Vocational Consultants Ltd | Professional & scientific | 2020 |
| POD 7 Consultancy Limited | Administrative & support | 2016 |
| POD 7 Property Limited | Real estate | 2018 |
| Pohs Practice Ltd | Administrative & support | 2017 |
| Polar Pilates Ltd | Arts & recreation | 2025 |
| Polish Saturday School Limited | Education | 2012 |
| Polo Medics Ltd | Administrative & support | 2012 |
| Polo Radio Ltd | Information & communication | 2024 |
| Poly Developments Limited | Construction | 2000 |
| Pools Plus Ltd. | Other services | 1988 |
| Pools Plus Tony & Co LLP | | 2008 |
| Poolside Construction UK LLP | | 2019 |
| POP UP Inns Limited | Hospitality | 2026 |
| Popeswood Homes Limited | Construction | 2020 |
| Posco Ltd | Information & communication | 2015 |
| Potential Grocers Ltd | Wholesale & retail | 2020 |
| Potential Retail Ltd | Wholesale & retail | 2020 |
| Poundnote Ltd | Information & communication | 2021 |