| Paul Clark Strategy Consulting Limited | Education | 2024 |
| Paul Lamond Games Limited | Manufacturing | 2007 |
| Paul Lamond Toys and Games Limited | Professional & scientific | 2000 |
| Paul Whiffin Holdings Limited | Financial services | 2018 |
| Paymán Construction Ltd | Construction | 2016 |
| Paymán Group Ltd | Financial services | 2016 |
| Paymán Holdings 14 Ltd | Hospitality | 2021 |
| Paymán Holdings 15 Ltd | Hospitality | 2024 |
| Paymán Holdings 5 Ltd | Hospitality | 2020 |
| Paymán Holdings 6 Ltd | Hospitality | 2020 |
| PBH Engineering Limited | Manufacturing | 1996 |
| Pblk Limited | Information & communication | 2007 |
| PD Groundworks & Construction Limited | Construction | 2021 |
| PDI Retail Services Limited | Professional & scientific | 2017 |
| PDS (Direct Services) Ltd | Transport & logistics | 2016 |
| PE GMP & QP Services Ltd | Professional & scientific | 2024 |
| Peace of Mind by SAM Ltd | Other services | 2021 |
| Pear Plumbing and Heating Limited | Construction | 2024 |
| PEC2 Limited | Hospitality | 2021 |
| Pechorin Limited | Professional & scientific | 2008 |
| Peek Estates Ltd | Real estate | 2022 |
| PEG Basher Ltd | Construction | 2016 |
| Pejorative Investments Squared Limited | Financial services | 2025 |
| Pelmark Consultancy Ltd | Professional & scientific | 2023 |
| Penn Art Ltd | Wholesale & retail | 2025 |
| Penny Deer Developments (a) Limited | Construction | 2021 |
| Penny Deer Developments Limited | Real estate | 2021 |
| Penny Rigging Ltd | Construction | 2023 |
| Performance Squared Limited | Professional & scientific | 2021 |
| Petanyo Limited | Professional & scientific | 2018 |
| Peter Jackson-Main Ltd | Professional & scientific | 2012 |
| Peterinary Care Ltd | Manufacturing | 2020 |
| PF Camprop Limited | Construction | 2016 |
| PF Legacy Ltd | Real estate | 2017 |
| Pfertec Limited | Manufacturing | 1996 |
| Pfylori Limited | Manufacturing | 1999 |
| Phil Bedford Limited | Professional & scientific | 2005 |
| Phoenix Clearance Ltd | Water & waste | 2022 |
| Phoenix Exhumations Limited | Professional & scientific | 2008 |
| Phoenix HR Management Limited | Administrative & support | 2023 |
| Phoenix Property Development Group Limited | Real estate | 2023 |
| Phoibos Consulting Limited | Information & communication | 2013 |
| Picbox Ltd | Professional & scientific | 2026 |
| Pied Bull Yard Management Company Limited | Households | 2006 |
| Pilatesfit Ltd | Other services | 2014 |
| Pings-Dl Limited | Wholesale & retail | 2021 |
| Pings-Hitchin Limited | Hospitality | 2026 |
| Pink Diamond Trading Company Limited | Wholesale & retail | 2021 |
| Pinset Limited | Information & communication | 1995 |
| Pioszpo Ltd | Transport & logistics | 2025 |
| Pirton Grange Farms Limited | Agriculture & fishing | 2017 |
| Plantdecor Limited | Administrative & support | 1990 |
| Plastic Turned Parts Limited | Manufacturing | 2004 |
| Plumnail Holding Company Limited | Financial services | 2023 |
| PMC Heating and Plumbing Ltd | Construction | 2017 |
| PNH Property Letchworth Limited | Real estate | 2011 |
| Polaris Financial Planning Ltd | Financial services | 2019 |
| Pomegranate Soup Limited | Extraterritorial | 2014 |
| Pond Park Limited | Agriculture & fishing | 1999 |
| Pooch Wellness Ltd | Other services | 2020 |
| Port Folio Yield Limited | Professional & scientific | 2011 |
| Portcullis Security Consulting Ltd | Professional & scientific | 2023 |
| Portland Heights Freehold Company Limited | Households | 2020 |
| Portland Heights RTM Company Limited | Households | 2012 |
| Post Connect Play Limited | Information & communication | 2016 |
| Potters Bar Flooring Contractors Ltd | Wholesale & retail | 2010 |
| Potters Bar Flooring Contracts Limited | Construction | 2017 |
| Potters Bar Flooring Solutions Limited | Wholesale & retail | 2015 |
| Power Build Construction Ltd | Construction | 2021 |
| Powerfall Ltd | Extraterritorial | 2014 |
| Praesidium Estates Ltd. | Real estate | 2016 |
| Praetor Forum Ltd | Households | 2024 |
| Pre-Owned (Gallus) Machinery Limited | Wholesale & retail | 2005 |
| Precision for Medicine (UK Labs) Limited | Professional & scientific | 2012 |
| Precision Prototype Solutions Ltd | Manufacturing | 2023 |
| Premier CPC Training Ltd | Administrative & support | 2014 |
| Prestige ARC & Sales Ltd | Wholesale & retail | 2026 |
| Prestine Orchid Cleaning and Household Services Ltd | Administrative & support | 2026 |
| Prevco Moving Group Ltd | Water & waste | 2025 |
| Price Arthur Ltd | Professional & scientific | 2011 |
| Primley Holdings Limited | Financial services | 2021 |
| Prince Property Improvements Limited | Construction | 2010 |
| Pringle Productions Limited | Information & communication | 2006 |
| Priors Hill Limited | Agriculture & fishing | 2017 |
| Prism Carpets & Flooring Limited | Construction | 2016 |
| Prism Projects (Newmarket) Limited | Real estate | 2000 |
| Prism Projects (South) Limited | Professional & scientific | 1998 |
| Pro Skin & Beauty School Ltd | Other services | 2025 |
| Pro-Cure Consulting Limited | Professional & scientific | 2014 |
| PRO100 Build Ltd | Construction | 2022 |
| Proactive Pathways Ltd | Health & social care | 2024 |
| Proampac Security Products Limited | Manufacturing | 2006 |
| Professional Blind and Curtain Installation Ltd | Administrative & support | 2011 |
| Progravitas Limited | Information & communication | 2007 |
| Project 5 Architecture LLP | | 2007 |
| Project Cancelled Limited | Arts & recreation | 2012 |
| Prolectronics Limited | Manufacturing | 2014 |
| Promotor Industries International Limited | Extraterritorial | 1997 |
| Proportional Ltd | Professional & scientific | 2014 |
| Prospect Heating Services Limited | Construction | 2024 |