| Pomeroy IT Solutions UK Limited | Information & communication | 1996 |
| Pond Management & Investments Limited | Real estate | 1994 |
| Ponte Bridge Limited | Real estate | 2023 |
| Pooja & Vinay Limited | Professional & scientific | 2021 |
| Pool Bank Consultancy Limited | Construction | 2021 |
| Poolman Administration Services Limited | Administrative & support | 2021 |
| Poolman Harlow Limited | Professional & scientific | 1991 |
| Poolman Property Management Ltd | Real estate | 2019 |
| Poolman Property Transfer Services Ltd | Real estate | 2024 |
| Popcorn Pass Limited | Other services | 2018 |
| Popcorn Pass Rewards Limited | Other services | 2018 |
| Poplar House Limited | Real estate | 2000 |
| Poplar Tree Digital Limited | Administrative & support | 2017 |
| Poppies Day Nursery (Knutsford) Limited | Education | 2012 |
| Populo Limited | Financial services | 2015 |
| Portdual Limited | Real estate | 1999 |
| Portfolio Growth Management Ltd | Real estate | 2017 |
| Portfolio Kitchens and Bathrooms Ltd | Wholesale & retail | 2015 |
| Portfolio Management Best Practice Limited | Administrative & support | 2014 |
| Porthcawl Court RTM Company Limited | Households | 2025 |
| Portkey Properties Ltd | Real estate | 2023 |
| Portland Imaging Limited | Professional & scientific | 2023 |
| Portland Place (Hale) Management Company Limited | Households | 2003 |
| Portland Street Estates Limited | Real estate | 2007 |
| Portland Wine Company Limited | Wholesale & retail | 2011 |
| Positive EV Ltd | Professional & scientific | 2012 |
| Positive Finance Ltd | Financial services | 2007 |
| Positive Impact Events | Education | 2007 |
| Positive Partnerships Ltd | Professional & scientific | 2023 |
| Post My JOB Ltd | Professional & scientific | 2015 |
| Posterity Property Developments Limited | Real estate | 2020 |
| Posture Care Limited | Wholesale & retail | 2012 |
| Posyrooms Ltd | Real estate | 2023 |
| Potation 1 Limited | Extraterritorial | 2021 |
| Potation 2 Limited | Extraterritorial | 2021 |
| Potation 3 Limited | Extraterritorial | 2022 |
| Potent Investments Ltd | Real estate | 2020 |
| Potter Topco Limited | Real estate | 2017 |
| Poverty Global Centre | Health & social care | 2018 |
| Power Construction (NW) Ltd | Extraterritorial | 2012 |
| Power Droid Limited | Construction | 2021 |
| Power on Electrical Services UK Ltd | Manufacturing | 2021 |
| Power Properties Group Limited | Real estate | 2022 |
| Power Your Points Holdings Limited | Information & communication | 2023 |
| Powergolf Ltd. | Professional & scientific | 2005 |
| Powerhub Solutions Ltd | Construction | 2021 |
| Powermail Limited | Financial services | 1995 |
| Pownall Court Management Limited | Households | 1971 |
| Pownall Place (Apartments) Management Company Limited | Households | 2005 |
| Pownall Plant Ltd | Administrative & support | 2012 |
| Pozzoni Architecture Limited | Professional & scientific | 2015 |
| PP Altrincham Management Company Limited | Real estate | 2015 |
| PP BOW Chambers Limited | Real estate | 2022 |
| PP Bowdon Holco Limited | Financial services | 2023 |
| PP Cheadle CP Limited | Financial services | 2022 |
| PP Cheadle LLP | | 2022 |
| PP Cheadle Thorpe Limited | Financial services | 2022 |
| PP Hale Management Company Limited | Real estate | 2018 |
| PP Vaccine Limited | Professional & scientific | 2021 |
| Pp&H Group Limited | Financial services | 2017 |
| PPC Protect Limited | Information & communication | 2016 |
| PPJ Property Management Ltd | Construction | 2025 |
| Pprs Consulting Limited | Professional & scientific | 2016 |
| PQ Ventures LLP | | 2016 |
| Pragma UK Financial Services Ltd | Professional & scientific | 2024 |
| Pragmatic People Ltd | Health & social care | 2024 |
| Pragmatic Pictures Limited | Information & communication | 2011 |
| Prahal Consultancy Limited | Information & communication | 2018 |
| Prahal Properties Limited | Real estate | 2023 |
| Prajapati Foods Limited | Hospitality | 2025 |
| Pralish Ltd | Wholesale & retail | 2025 |
| Prana F&B Limited | Hospitality | 2024 |
| Pravasi Collections Ltd | Wholesale & retail | 2024 |
| Praveenchand Limited | Information & communication | 2025 |
| Praxic Limited | Information & communication | 2026 |
| PRE Chasm Research Limited | Professional & scientific | 2009 |
| PRECI5ION Limited | Professional & scientific | 2018 |
| Precision Analogue Digital Limited | Professional & scientific | 2012 |
| Precision Football Coaching Ltd | Arts & recreation | 2025 |
| Precision Imaging Healthcare Limited | Health & social care | 2021 |
| Precision Investment Castings Limited | Manufacturing | 2013 |
| Precision Path Aero Limited | Professional & scientific | 2026 |
| Precision Programming Limited | Information & communication | 2019 |
| Precision Repair Group Ltd | Financial services | 2025 |
| Preemo Flooring Limited | Wholesale & retail | 2025 |
| Preeti Smiles Ltd | Health & social care | 2018 |
| Pregistry Holdings Limited | Financial services | 2023 |
| Premier Building Group Finance Limited | Financial services | 2023 |
| Premier Building Group Holdings Limited | Financial services | 2023 |
| Premier Conservatory Supplies Limited | Wholesale & retail | 2011 |
| Premier Golf Management Limited | Arts & recreation | 2010 |
| Premier Home Repairs and Improvements Ltd | Construction | 2025 |
| Premier Information Security Services Limited | Professional & scientific | 2017 |
| Premier Pest Control Services Ltd | Administrative & support | 2018 |
| Premier Sourcing Limited | Transport & logistics | 2015 |
| Premiere Finance Limited | Financial services | 2025 |
| Premiere Post Production Limited | Professional & scientific | 2015 |
| Premium Collections Group Limited | Administrative & support | 2015 |
| Premium Collections Limited | Administrative & support | 2002 |
| Premium Collections Northern Limited | Administrative & support | 2011 |