| Pierhouse Business Solutions Limited | Information & communication | 1997 |
| Piffers Consulting Ltd | Manufacturing | 2020 |
| PIG FX Ltd | Administrative & support | 2022 |
| Pikin Limited | Administrative & support | 2007 |
| PIL Sung DO Limited | Arts & recreation | 2009 |
| Pile Test Limited | Extraterritorial | 1999 |
| Pilgrims Forensic & Medical Sciences Limited | Professional & scientific | 2015 |
| Pilgrims Group Limited | Administrative & support | 1998 |
| Pilgrims Risk Management Consultancy Services Limited | Information & communication | 2020 |
| Pilgrims Risk Management Group Limited | Other services | 2020 |
| Pilgrims Security Services Limited | Extraterritorial | 2005 |
| Pinball Republic London Limited | Other services | 2021 |
| Pindi Bazaar Ltd | Wholesale & retail | 2024 |
| Pine Acre Court Limited | Households | 1992 |
| Pine Close Management (Horsell) Limited | Households | 1981 |
| Pineacre (Sunningdale) Management Limited | Households | 1976 |
| Pinelogik Solutions Private Limited | Information & communication | 2021 |
| Pink Parsnip Computers Ltd | Wholesale & retail | 2025 |
| Pink Parsnip Ltd | Information & communication | 2020 |
| Pinkies Beauty Ltd | Other services | 2025 |
| Pinky Nails Woking Limited | Other services | 2019 |
| Pinnacle Elite Ltd | Health & social care | 2025 |
| Pinnacle Innovation Limited | Information & communication | 2017 |
| Pinnamaneni Global Trust Ltd | Professional & scientific | 2024 |
| Pinnocks Coffee Ltd | Wholesale & retail | 2012 |
| Pinseeker Community Golf Limited | Arts & recreation | 2025 |
| Pioneer Financial Services Limited | Financial services | 2011 |
| Pioneer Homez Ltd | Real estate | 2015 |
| Pioneered Athlete Performance (Global) Ltd | Other services | 2023 |
| Pioneered Athlete Performance Limited | Other services | 2015 |
| Pioneering Services Limited | Other services | 2007 |
| PIP Innovation Limited | Professional & scientific | 2012 |
| Piping Hot Digital Ltd | Professional & scientific | 2023 |
| Piping Hot Plumbing Ltd | Construction | 2010 |
| Pippins Maintenance Limited | Households | 2016 |
| Pirbright Consulting Limited | Professional & scientific | 2013 |
| Pirbright Innovations Limited | Construction | 2002 |
| Pixel Plus Limited | Extraterritorial | 2012 |
| Pixies Properties Ltd | Real estate | 2016 |
| Pizza HUT Asia Franchising, LP | | 2019 |
| Pizza Woking Ltd | Hospitality | 2020 |
| Pizzabab Grill Limited | Hospitality | 2026 |
| PJP Carpentry Ltd | Construction | 2013 |
| PJP Homes Ltd | Construction | 2019 |
| PJP Partner Group Ltd | Financial services | 2020 |
| Placeably Ltd | Real estate | 2026 |
| Placide Places Ltd | Health & social care | 2022 |
| Plaidy Holdings Limited | Real estate | 2019 |
| Plan Limited | Other services | 1994 |
| Planesayling Aviation Limited | Wholesale & retail | 2010 |
| Planexa Consulting Ltd | Professional & scientific | 2026 |
| Plant Heritage | Information & communication | 1988 |
| Plants Limited | Wholesale & retail | 1986 |
| Planwise AI Ltd | Information & communication | 2026 |
| Platform Technology Services Limited | Information & communication | 1996 |
| PLATFORM4 Advisory Ltd | Professional & scientific | 2025 |
| Platinum Classics Car Restoration Limited | Wholesale & retail | 2022 |
| Platinum Parts Limited | Wholesale & retail | 2024 |
| Platinum Plus Soccer Centres Ltd | Arts & recreation | 2025 |
| Platinum Soccer Centres Hampshire Limited | Arts & recreation | 2021 |
| Platinum Soccer Centres Middlesex Limited | Arts & recreation | 2023 |
| Platomic Tech Ltd | Information & communication | 2023 |
| Plaxbury Properties Limited | Real estate | 1999 |
| Playball Clapham Limited | Arts & recreation | 2015 |
| Playball Dulwich Ltd | Arts & recreation | 2018 |
| Playball Fulham Limited | Arts & recreation | 2015 |
| Playball South West Limited | Education | 2007 |
| Playball Thames Ditton Ltd | Education | 2020 |
| Playhouse Theatre Limited | Arts & recreation | 2002 |
| Playpinion Limited | Information & communication | 2009 |
| Pleiades Leisure Limited | Arts & recreation | 2012 |
| Plenty Paws Ltd | Other services | 2023 |
| Plotholders Land Management Group Limited | Real estate | 2012 |
| Plouton Consulting Ltd | Professional & scientific | 2025 |
| PLU3 Ltd | Professional & scientific | 2025 |
| Plum Content Ltd | Information & communication | 2022 |
| Plum Houses Limited | Construction | 1999 |
| Plum Retreats Ltd | Real estate | 2024 |
| Plumber Geeks UK Ltd | Construction | 2025 |
| Plumbing & Heating Surrey Ltd | Construction | 2025 |
| Plumbline Heating Ltd | Construction | 2020 |
| Plusberry Ltd | Wholesale & retail | 2009 |
| Plush Beauty Studio Limited | Other services | 2021 |
| Plusproperties Investments Ltd | Real estate | 2020 |
| Plyra Ltd | Wholesale & retail | 2024 |
| PM Staff Ltd | Transport & logistics | 2016 |
| PMC Properties Ltd | Professional & scientific | 2001 |
| Pmis Global Solutions Limited | Information & communication | 2025 |
| Pmis-Uk Investments Limited | Real estate | 2021 |
| Pmis-Uk Limited | Information & communication | 2018 |
| PMPS2 Limited | Real estate | 2019 |
| PNW Enterprises Limited | Information & communication | 2006 |
| Pochettino Limited | Hospitality | 2023 |
| Pocket of Pearls Limited | Wholesale & retail | 2025 |
| Polaris Accounting Limited | Professional & scientific | 2025 |
| Polibuild Limited | Construction | 2024 |
| Police Care UK | Health & social care | 2013 |
| Polly Adams Advisory Limited | Administrative & support | 2026 |
| Polo Sports PR Ltd | Agriculture & fishing | 2018 |
| Polska Wedzarnia/Polish Smokehouse Limited | Manufacturing | 2022 |