| Penlynn Investments | Professional & scientific | 2018 |
| Pennine Stoves Limited | Construction | 2015 |
| Pennivision Limited | Information & communication | 2008 |
| Pension Trace Limited | Financial services | 2023 |
| Pension Works Limited | Financial services | 2015 |
| People Place Technology Ltd | Professional & scientific | 2026 |
| Peover Property Limited | Real estate | 2020 |
| Peover Property Services Limited | Real estate | 2011 |
| PEP Futures Ltd | Professional & scientific | 2026 |
| Peplertech Limited | Wholesale & retail | 2002 |
| Pepper POT Properties Limited | Real estate | 2024 |
| Pepper Street Properties Limited | Real estate | 2020 |
| Perera Homes Ltd | Real estate | 2025 |
| Perera Properties Ltd | Real estate | 2019 |
| Perform BA Services Limited | Information & communication | 2014 |
| Performance Acoustics Ltd | Professional & scientific | 2024 |
| Perryworld Limited | Professional & scientific | 1985 |
| Persei Management Ltd | Administrative & support | 2019 |
| Persia Tech Ltd | Wholesale & retail | 2023 |
| Personalitee Ltd | Wholesale & retail | 2019 |
| Peter Collins (Classic Motor Cycles) Limited | Wholesale & retail | 1986 |
| Peterloo Hotels Limited | Hospitality | 2001 |
| Petone LLP | | 2005 |
| Petrenko Limited | Health & social care | 2016 |
| Petrichor Bulbs Ltd | Wholesale & retail | 2026 |
| Petscript Limited | Information & communication | 2026 |
| Phase AI Ltd | Information & communication | 2025 |
| Philbeach Crescent Group Limited | Households | 2018 |
| Philipe Marques Interior Design Limited | Wholesale & retail | 2009 |
| Phoenix Accounting and Bookkeeping Services Limited | Professional & scientific | 2022 |
| Pickmere Investments Limited | Construction | 2026 |
| Piedaj Limited | Extraterritorial | 2023 |
| Piggy Peter Limited | Information & communication | 2003 |
| Pike Studio Limited | Administrative & support | 2024 |
| Pillar Heights Ltd | Real estate | 2023 |
| PIN High Developments Limited | Construction | 2021 |
| Pink Salt Care Ltd | Real estate | 2017 |
| Pink Salt Limited | Real estate | 2019 |
| Pinter Properties Limited | Real estate | 2019 |
| Pioneer Civil Engineering Ltd | Construction | 2019 |
| Pioneer Rail Limited | Construction | 2021 |
| Pixel Air Limited | Information & communication | 1998 |
| Placeability Limited | Administrative & support | 2010 |
| Places With a Purpose Limited | Administrative & support | 2018 |
| Plan Architect Studio Ltd | Professional & scientific | 2022 |
| Planet Amazing Ltd | Information & communication | 2016 |
| Planetree Homes Limited | Real estate | 2000 |
| Planned Developments Limited | Arts & recreation | 1990 |
| Plasmergy Limited | Professional & scientific | 2024 |
| Plate & Locate Limited | Manufacturing | 2002 |
| Platewave Limited | Information & communication | 2018 |
| Platinum Plastering NW Ltd | Construction | 2017 |
| Platts Consulting Limited | Professional & scientific | 2020 |
| Play Fuel Nutrition Ltd | Health & social care | 2026 |
| PLT Developments Limited | Construction | 2015 |
| PLT Properties Limited | Construction | 2016 |
| Plum PR Limited | Professional & scientific | 2025 |
| Plumleys Cafe Ltd. | Hospitality | 2017 |
| Plumleys Plant and Garden Centre Ltd. | Wholesale & retail | 2017 |
| Plus-Project EOT Ltd | Information & communication | 2019 |
| Plus-Project Ltd | Information & communication | 2011 |
| Plymouth Electrical Wholesalers Limited | Extraterritorial | 1998 |
| PM Cheshire Ltd | Construction | 2025 |
| PNK Limited | Wholesale & retail | 2018 |
| Pollywaffle Limited | Professional & scientific | 2024 |
| Poojadil Limited | Real estate | 2025 |
| Pookie Candles Ltd | Manufacturing | 2023 |
| Port Electrical Services Ltd | Construction | 2016 |
| Porth Helaeth Holdings Limited | Real estate | 2018 |
| Portswigger Ltd | Information & communication | 2008 |
| Positive Outcomes RPM Limited | Education | 2025 |
| POT Master Holdings Limited | Manufacturing | 2010 |
| POT of Gold Ltd | Wholesale & retail | 2021 |
| POW Slap Ltd | Other services | 2025 |
| Power Wholesale Limited | Extraterritorial | 1964 |
| Pownall Farm Management Company Limited | Real estate | 2014 |
| PPM Surveying Limited | Professional & scientific | 2017 |
| PPS Cheshire Ltd | Real estate | 2012 |
| Praetora Ltd | Professional & scientific | 2025 |
| Praevo Partners Limited | Professional & scientific | 2025 |
| Precast Design (MCR) Limited | Professional & scientific | 2000 |
| Premier Coaching and Consultancy Ltd | Information & communication | 2022 |
| Premier Construction Limited | Construction | 2016 |
| Press Construction Limited | Extraterritorial | 1949 |
| Prevolution Health Limited | Professional & scientific | 2023 |
| Pride in People Limited | Administrative & support | 2011 |
| Prime Fit OUT Ltd | Construction | 2021 |
| Prime Global Medical Communications Ltd. | Professional & scientific | 1998 |
| Prime Market Access Limited | Professional & scientific | 1998 |
| Prime Medica Limited | Professional & scientific | 1997 |
| Primrose Residential Investments LLP | | 2013 |
| Pro Design Consultancy Ltd | Information & communication | 2006 |
| Probuild Cheshire Ltd | Construction | 2025 |
| Process Plants Suppliers Limited | Professional & scientific | 1969 |
| Production Services Network Bangladesh Limited | Professional & scientific | 1988 |
| Profitspiral Limited | Households | 1987 |
| Prognosis Advisory Limited | Professional & scientific | 2026 |
| Progress Safety Ltd | Professional & scientific | 2014 |
| Project Chess Midco Limited | Financial services | 2024 |
| Project Chess Nominee Limited | Financial services | 2024 |