| PERSEUS3 Properties Limited | Real estate | 2022 |
| Personal Touch Events LLP | | 2015 |
| Personnel Resource Solutions Limited | Administrative & support | 2010 |
| Perspecto Limited | Information & communication | 2024 |
| Pesc Limited | Professional & scientific | 2024 |
| PET-M8 Limited | Wholesale & retail | 2017 |
| Petaholic London Limited | Wholesale & retail | 2025 |
| Petch Ltd | Wholesale & retail | 2025 |
| Pete's Chippy Limited | Hospitality | 2002 |
| Peter Birch Projects Limited | Professional & scientific | 2026 |
| Peter J Quinn Ltd | Extraterritorial | 2006 |
| Peter Lawrence Developments Limited | | 1984 |
| Peter Mark Limited | Professional & scientific | 1988 |
| Peter Wrenshall Limited | Administrative & support | 2014 |
| Peterson Ventures Ltd | Information & communication | 2026 |
| Petoria Properties Ltd | Real estate | 2021 |
| Petre Group Ltd | Extraterritorial | 2015 |
| Petre Properties Ltd | Real estate | 2015 |
| Petrie Limited | Real estate | 2025 |
| Petrikaitis Ltd | Real estate | 2021 |
| Petro-Canada Europe Lubricants Limited | Wholesale & retail | 2005 |
| Petrodeal Ltd | Professional & scientific | 2025 |
| Pettener Holdings Limited | Real estate | 2021 |
| Pexhill Limited | Wholesale & retail | 2024 |
| PFC Law Limited | Professional & scientific | 2017 |
| Pfeiffin Limited | Professional & scientific | 2022 |
| Pgap Limited | Information & communication | 2017 |
| PGD Consulting Ltd | Professional & scientific | 2025 |
| PGM Property Maintenance Ltd | Construction | 2024 |
| PGP Cars Limited | | 2007 |
| Phab Build Ltd | Manufacturing | 2019 |
| Phadia International Holdings LP | | 2022 |
| Phaidra, Ltd. | Information & communication | 2022 |
| Pharezfest UK C.I.C. | Health & social care | 2020 |
| Pharma Design Limited | Professional & scientific | 2022 |
| Pharma Locum Private Ltd | Health & social care | 2014 |
| Pharmahive Ltd | Wholesale & retail | 2023 |
| Pharmaron (UK) Investments Limited | Financial services | 2020 |
| Pharmaron Biologics (UK) Holdings Limited | Financial services | 2020 |
| Pharmaxone Limited | Professional & scientific | 2018 |
| Pharon Consulting Limited | Real estate | 2025 |
| Phasear Ltd | Professional & scientific | 2018 |
| Phat Club Altrincham Ltd | Hospitality | 2025 |
| PHB Home Improvements Ltd | Construction | 2024 |
| Phidini Ltd | Health & social care | 2021 |
| Phidini Properties Ltd | Real estate | 2022 |
| Phil Burt Innovation Ltd | Professional & scientific | 2018 |
| Phil Burt Ltd | Wholesale & retail | 2018 |
| Phil Johnson Ltd | Professional & scientific | 2017 |
| Phil Kenny Limited | Health & social care | 2020 |
| Phil Peers Professional Services Ltd | Professional & scientific | 2020 |
| Phildsc.Com SEO & PPC Ltd | Administrative & support | 2020 |
| Philip H. Jones, Medico-Legal Reports Ltd | Health & social care | 2010 |
| Philip Shapiro Limited | Professional & scientific | 1991 |
| Philipp Consulting Limited | Administrative & support | 2016 |
| Phillips Brown Limited | Professional & scientific | 1989 |
| Phobos Engineering Limited | Professional & scientific | 2022 |
| Phoenix Academy Ltd | Education | 2025 |
| Phoenix Cacao Ltd | Wholesale & retail | 2022 |
| Phoenix Estate & Investment Ltd | Real estate | 2019 |
| Phoenix Inspection Systems Limited | Manufacturing | 1983 |
| Phoenix Projectsx Limited | Professional & scientific | 2022 |
| Phoenix Properties (Manchester) Limited | Construction | 2026 |
| Phoenix Shadow Limited | Administrative & support | 2015 |
| Phoenix Software Solutions Ltd | Information & communication | 2015 |
| Photography Today Ltd | Professional & scientific | 2026 |
| PHR Qual-Itworks Limited | Administrative & support | 2013 |
| Phronesium Ltd | Professional & scientific | 2026 |
| PHV Ltd | Transport & logistics | 2019 |
| Physio Matters Plus Limited | Education | 2021 |
| PI Computing Limited | Professional & scientific | 1990 |
| PI Specialist Finishing Limited | Manufacturing | 2016 |
| PI Squared Consulting Limited | Professional & scientific | 2005 |
| PIC BR Limited | Construction | 2022 |
| PIC Brook Close Limited | Construction | 2023 |
| PIC Dobfield Limited | Construction | 2022 |
| PIC Grove Lane Limited | Construction | 2019 |
| PIC Mags Limited | Construction | 2024 |
| PIC Park Road 2 Limited | Construction | 2023 |
| PIC Park Road Limited | Construction | 2021 |
| PIC Refurbs Limited | Real estate | 2019 |
| Piccadilly 23 Ltd | Real estate | 2021 |
| Piccadilly Properties (Manchester) Limited | Financial services | 2019 |
| Pickerings Investments Limited | Real estate | 2025 |
| Pierce Assets Limited | Information & communication | 2011 |
| Pierce Management Services Limited | Information & communication | 2010 |
| Pietra Illuminata Limited | Wholesale & retail | 2025 |
| Pigment Global Limited | Information & communication | 2020 |
| Pilot Group NET Zero Solutions Limited | Extraterritorial | 2025 |
| Pinchpoint Engineering Limited | Administrative & support | 2011 |
| Pine Court Management (Bramhall) Limited | Real estate | 1973 |
| Pinevalley Developments Limited | Construction | 2020 |
| Pinewood Court (Sale) Limited | Households | 1973 |
| Pink Five Limited | Information & communication | 2023 |
| Pink Productions Limited | Arts & recreation | 2014 |
| Pinnacle Consulting (EA) Ltd | Administrative & support | 2015 |
| Pinnacle Contracting Solutions Limited | Professional & scientific | 2023 |
| Pinnacle Engineering & Equipment Ltd | Administrative & support | 2025 |
| Pinnacle International Sports and Media Management Limited | Professional & scientific | 2023 |
| Pinnacle IT Consulting Limited | Information & communication | 2023 |