| Pantiles Securities Limited | Real estate | 2004 |
| Papa Dean Properties Limited | Real estate | 2017 |
| Papa Family Centre Ltd | Health & social care | 2024 |
| Papa Home Care Ltd | Health & social care | 2024 |
| Papalogistic Ltd | Transport & logistics | 2020 |
| Paper Mill Lock Cruises Limited | Arts & recreation | 2006 |
| Papis Limited | Wholesale & retail | 2017 |
| Papworth Fleet Services Limited | Wholesale & retail | 2017 |
| Paraclate UK Ltd | Health & social care | 2026 |
| Parade 39 Limited | Financial services | 2019 |
| Paradise Lodge Care Home Limited | Health & social care | 2003 |
| Paradise Workplace Solutions Ltd | Professional & scientific | 2025 |
| Paragon Paving & Resin Surfaces Ltd | Construction | 2019 |
| Parah Services Limited | Real estate | 2025 |
| Paramdhan IT Limited | Information & communication | 2014 |
| Parametrik Limited | Professional & scientific | 2017 |
| Paramount Foods Limited | Wholesale & retail | 2023 |
| Pare Consultancy Limited | Professional & scientific | 2012 |
| Parikh Capital Investment Ltd | Real estate | 2024 |
| Park Electrix Ltd | Construction | 2021 |
| Park Farm Estate Ltd | Real estate | 2025 |
| Park Investment Marketing Limited | Financial services | 2012 |
| Park Lane Securities Limited | Construction | 2014 |
| Park LET Limited | Administrative & support | 2004 |
| Park Plumbing Ltd | Construction | 2023 |
| Parkdale Consulting Limited | Administrative & support | 2019 |
| Parker Industries Ltd | Wholesale & retail | 2020 |
| Parkes Plastering Limited | Construction | 2025 |
| Parkfront Properties Ltd | Real estate | 2020 |
| Parkgate Consulting Limited | Professional & scientific | 2011 |
| Parkgate Retail Limited | Wholesale & retail | 2023 |
| Parking Perspectives Limited | Professional & scientific | 2017 |
| Parklands Trading Ltd | Wholesale & retail | 2026 |
| Parklife Innovations Holdings Limited | Financial services | 2021 |
| Parklife Innovations Ltd | Wholesale & retail | 2011 |
| Parkview Court (Wickford) RTM Company Limited | Households | 2008 |
| Parradine Ltd | Construction | 2020 |
| Parravox Limited | Administrative & support | 2022 |
| Parrocomm Limited | Construction | 2001 |
| Parrott and Parkin Construction Limited | Construction | 2022 |
| Parry Cohen Limited | Real estate | 2011 |
| Parry Residential Limited | Real estate | 2023 |
| Parsley Electrical Ltd | Construction | 2021 |
| Parsons Legal Search Ltd | Administrative & support | 2020 |
| Parsons Property Developments Limited | Construction | 2004 |
| Partners for Independence Ltd | Education | 2019 |
| Partnership Link Limited | Professional & scientific | 2016 |
| Partybits Limited | Extraterritorial | 2012 |
| Partyman Group Limited | Administrative & support | 2017 |
| Partyman World (Lakeside) Limited | Health & social care | 2009 |
| Paseana Limited | Wholesale & retail | 1992 |
| Pasini Property Co. Ltd | Real estate | 2025 |
| Passion Tree Care Services Ltd | Health & social care | 2016 |
| Patca Limited | Information & communication | 2017 |
| Patching Hall Management Company Limited | Households | 1981 |
| Patel Capital Limited | Real estate | 2020 |
| Pathway Medical Limited | Health & social care | 1995 |
| Patina Portfolio Management Ltd | Wholesale & retail | 2025 |
| Patrick John O'Callaghan Limited | Extraterritorial | 2024 |
| Patrick Stroud Designs Ltd | Professional & scientific | 2017 |
| Pats Cakes Ltd | Manufacturing | 2025 |
| Paul Barker Rigging Ltd | Construction | 2009 |
| Paul Cockrell Consultancy Ltd | Professional & scientific | 2017 |
| Paul Frain Taxis Ltd | Transport & logistics | 2020 |
| Paul Hadley Limited | Agriculture & fishing | 1949 |
| Paul Haythornthwaite Holdings Ltd | Financial services | 2024 |
| Paul Robins Ltd | Real estate | 2025 |
| Paul Weedon Limited | Professional & scientific | 2016 |
| PAV Construction Engineering Limited | Professional & scientific | 2011 |
| Paving Sales Limited | Wholesale & retail | 2024 |
| Pavitech Limited | Financial services | 2025 |
| Paxar Engineering & Survey Solutions Limited | Professional & scientific | 2024 |
| Payeasy Limited | Professional & scientific | 1999 |
| Payne Fitness Ltd | Arts & recreation | 2025 |
| Payroll by Simply Ltd | Professional & scientific | 2022 |
| Payrolled Limited | Administrative & support | 2025 |
| Paysys Limited | Information & communication | 2025 |
| Payton and Sons Limited | Construction | 2019 |
| PB & OB Ltd | Hospitality | 2024 |
| PB Finishers Limited | Administrative & support | 2018 |
| PB Lock and Auto Keys Limited | Manufacturing | 2018 |
| PB Sealants Limited | Construction | 2003 |
| PB VET Limited | Professional & scientific | 2016 |
| PBD Prop Co Limited | Real estate | 2016 |
| PC Build (South East) Limited | Construction | 2021 |
| PC Groundworks (South East) Limited | Construction | 2017 |
| PCS Construction & Maintenance Ltd | Construction | 2020 |
| PD Plant & Vehicle Services Ltd | Manufacturing | 2025 |
| Pdcd Limited | Professional & scientific | 2024 |
| PDG147 Ltd | Real estate | 2025 |
| PDS Flatworks Ltd | Real estate | 2011 |
| PDS Homeworks Ltd | Real estate | 2017 |
| Pe.Tv Ltd | Professional & scientific | 2023 |
| Peace Productions Ltd | Information & communication | 2020 |
| Peaceful Staying Ltd | Real estate | 2025 |
| PEACHTREE1279 Limited | Financial services | 2004 |
| Peah Care Services Ltd | Health & social care | 2022 |
| Peak Elite Pro Limited | Health & social care | 2025 |
| Peak Skills Limited | Health & social care | 2000 |
| Pearce Landscapes Limited | Administrative & support | 2023 |