| Phoenix Collective Ltd | Professional & scientific | 2022 |
| Phone Repair Zone Ltd | Other services | 2025 |
| Photobook Genius Limited | Wholesale & retail | 2017 |
| Physioconnect Limited | Health & social care | 2020 |
| Picklescott Homes Limited | Real estate | 2013 |
| Picklescott Properties Ltd | Real estate | 2021 |
| Piexpertise Limited | Hospitality | 2016 |
| Pifpaf Design Ltd | Professional & scientific | 2024 |
| Pigeon Enterprises Limited | Administrative & support | 2014 |
| Pigeon Enterprises Services Limited | Administrative & support | 2023 |
| Pika Homes Ltd | Real estate | 2019 |
| Pilgrim Works Limited | Extraterritorial | 2015 |
| Pillarpoint Construction Consultancy Ltd | Construction | 2025 |
| Pimlico Homes (Station Road Henley) Limited | Construction | 2006 |
| Pink Sky Properties Ltd | Construction | 2021 |
| Pinky's Salon Ltd | Other services | 2019 |
| Pinson Close Management Company Limited | Households | 2011 |
| Piper Resources Limited | Professional & scientific | 2003 |
| PIT 13 Ltd | Extraterritorial | 2023 |
| Pivot RPO Limited | Administrative & support | 2008 |
| Pivotal Recovery CIC | Health & social care | 2021 |
| Pivotpoint Pro Ltd | Professional & scientific | 2025 |
| Pixel Games Ltd | Extraterritorial | 2021 |
| Pixel Smash Games Ltd | Information & communication | 2022 |
| Pixel Toys Ltd | Information & communication | 2012 |
| Pizza BOI Ltd | Wholesale & retail | 2023 |
| Pizzarestaurant Ltd | Hospitality | 2023 |
| Pjds Holdings Limited | Professional & scientific | 2008 |
| PJF Farming Limited | Agriculture & fishing | 2015 |
| PJT Community Science Community Interest Company | Education | 2011 |
| PJT Property Group Ltd | Real estate | 2025 |
| PJT Science Limited | Education | 2006 |
| Plainsman Limited | Wholesale & retail | 2024 |
| Planet Collaboration Limited | Professional & scientific | 2022 |
| Planit Planning and Development Limited | Other services | 2012 |
| Planned-Scapes Ltd | Water & waste | 2016 |
| Plasgran Limited | Manufacturing | 1999 |
| Plastic Lifecycling Limited | Other services | 2019 |
| Plates of Plants Limited | Wholesale & retail | 2020 |
| Platinum Boiler Services (Leam Spa) Ltd | Construction | 2024 |
| Platinum Ventures Limited | Real estate | 1995 |
| Playback Frames Limited | Wholesale & retail | 2010 |
| Playbook Advisory Group Limited | Professional & scientific | 2026 |
| Plus 8 Industries Limited | Wholesale & retail | 2009 |
| Plus Tools Limited | Manufacturing | 2018 |
| Plusprinting Ltd | Manufacturing | 2023 |
| PMD Data Solutions Limited | Wholesale & retail | 1977 |
| Po'Sh Creative Limited | Professional & scientific | 2013 |
| Poise Studios Ltd | Education | 2025 |
| Polar Electro (UK) Limited | Wholesale & retail | 2005 |
| Polar Properties Limited | Real estate | 1988 |
| Polcomm Training & Development Limited | Professional & scientific | 2020 |
| Pomona Properties Limited | Real estate | 2021 |
| Pooni Medical Services Limited | Professional & scientific | 2010 |
| Porpola Ltd | Wholesale & retail | 2026 |
| Portable Ltd | Professional & scientific | 2011 |
| Portenza Ltd | Wholesale & retail | 2025 |
| Portiahealth Limited | Public administration | 2024 |
| Portland Flats Limited | Real estate | 2019 |
| Portley Properties Ltd | Real estate | 2018 |
| Portobello Bridge Residents Association Limited | Households | 1965 |
| Portofino Cafe Limited | Hospitality | 2019 |
| Portuguese Flavours & Cuisine Ltd | Wholesale & retail | 2024 |
| Poseidon Concepts Ltd | Hospitality | 2024 |
| Positive Mind Space Limited | Health & social care | 2013 |
| Positive Science People Limited | Wholesale & retail | 2019 |
| Posseder Limited | Wholesale & retail | 2020 |
| Possessio Property Ltd | Real estate | 2020 |
| Pottaway Ltd | Real estate | 2019 |
| Potterne Eggs Ltd | Agriculture & fishing | 2025 |
| Potters Home Improvements UK Ltd | Construction | 2026 |
| Power & Water Alliance Limited | Professional & scientific | 2016 |
| Power Size Technologies Ltd | Information & communication | 2026 |
| Powerfour Holdings Ltd | Financial services | 2019 |
| Powerhouse Marketing Limited | Professional & scientific | 2026 |
| Powis SFR Ltd | Transport & logistics | 2025 |
| Poynter Associates Ltd | Professional & scientific | 2011 |
| PP EMU Limited | Other services | 2025 |
| PPE Pacs Limited | Wholesale & retail | 2020 |
| PPH Consultants Ltd | Professional & scientific | 2023 |
| PPH Management Limited | Construction | 2015 |
| PPJ Healthcare Ltd | Health & social care | 2013 |
| PR Finishings Ltd | Construction | 2024 |
| Pramila Technical Services Limited | Professional & scientific | 2014 |
| Prebay Limited | Extraterritorial | 2018 |
| Precious Support Services Limited | Health & social care | 2015 |
| Precision Digital Limited | Professional & scientific | 2013 |
| Predictednow Limited | Other services | 2016 |
| Preecepools Ltd | Construction | 2021 |
| Preeti Developers Ltd | Information & communication | 2018 |
| Prem Short Stays Ltd | Real estate | 2025 |
| Premea Limited | Professional & scientific | 2006 |
| PREMI3R Solutions Ltd | Real estate | 2017 |
| Premier Student Halls Limited | Construction | 2011 |
| Presdec Investments Limited | Financial services | 2024 |
| Prestige Components Ltd | Wholesale & retail | 2025 |
| Prestige Floor Sanding Ltd | Construction | 2022 |
| Presto Classical (Holdings) Limited | Professional & scientific | 2017 |
| Presto Classical Limited | Wholesale & retail | 2010 |
| Preston Executive Performance Ltd | Professional & scientific | 2019 |