| PJN Developments Limited | Construction | 2013 |
| PJW Technical Services Limited | Professional & scientific | 2016 |
| PK Escapes Limited | Administrative & support | 2020 |
| PKG Management Limited | Extraterritorial | 2002 |
| PKT Project Management Ltd | Construction | 2025 |
| Place London Ltd | Information & communication | 2024 |
| Plan a UK Ltd | Professional & scientific | 2005 |
| Plan G Ltd | Other services | 2011 |
| Plan IT Tidy Ltd | Information & communication | 2012 |
| Plan My Pension Limited | Financial services | 2007 |
| Planet 101 Ltd | Information & communication | 2019 |
| Planet BEE Ltd | Other services | 2012 |
| Planfacade Ltd | Administrative & support | 2020 |
| Planhorse International Limited | Wholesale & retail | 2024 |
| Planners & Arkitects Ltd | Professional & scientific | 2022 |
| Plans With Purpose Ltd | Professional & scientific | 2017 |
| Planters Engineering Company Limited(The) | Real estate | 1912 |
| Plate One Ltd | Hospitality | 2021 |
| Platinum FOX Business Consultants Ltd | Professional & scientific | 2023 |
| Platinum Kebabs & Meat Ltd | Manufacturing | 2023 |
| PLAY360.AI Ltd | Information & communication | 2024 |
| Playdemic Limited | Information & communication | 2009 |
| Plenti Hire Guildford Limited | Administrative & support | 2024 |
| Pljw Trading | Professional & scientific | 2012 |
| Plot Unlock Land Solutions Ltd | Real estate | 2025 |
| PLU Europe Group Ltd | Financial services | 2025 |
| PLU Group Holdings Limited | Financial services | 2024 |
| Plug and Play (UK) Group Limited | Professional & scientific | 2014 |
| Plug and Play Design Ltd | Information & communication | 2009 |
| Plumbing Associates Ltd | Construction | 2025 |
| Plumbing Express Limited | Extraterritorial | 1989 |
| Plusideas Ltd. | Administrative & support | 2013 |
| Pluto Trading Limited | Financial services | 2024 |
| Plutus Crest Limited | Professional & scientific | 2024 |
| PM Landscapes Ltd | Administrative & support | 2002 |
| PNK Distributions Ltd | Wholesale & retail | 2018 |
| Pocket Hospitality Limited | Hospitality | 2025 |
| Pocus Frimley Emergency & Procedures Ltd | Education | 2023 |
| Podium Bathrooms Limited | Wholesale & retail | 2025 |
| Point Cleaning Ltd | Administrative & support | 2020 |
| Point Engineering Company Limited | Real estate | 1954 |
| Pole Star EAM Limited | Manufacturing | 2017 |
| Pole Star Group Investments Ltd | Real estate | 2024 |
| Polesden Properties Limited | Construction | 2004 |
| Polestar CF LLP | | 2006 |
| Polestar Corporate Finance Limited | Financial services | 2010 |
| Polish IT OFF Ltd | Hospitality | 2024 |
| Pollaa Limited | Other services | 2026 |
| Pollard Properties (Surrey) Ltd | Construction | 2026 |
| Polly Turnill Fitness Ltd | Arts & recreation | 2026 |
| Polstore Storage Systems Limited | Wholesale & retail | 1994 |
| Polymer Clay PIT Ltd | Wholesale & retail | 2008 |
| Pond Meadow Academy Trust | Education | 2014 |
| Pond Trading | Professional & scientific | 2012 |
| Pondfield Management Limited | Households | 2017 |
| POP + Bark Ltd | Professional & scientific | 2020 |
| Popbas Limited | Hospitality | 2025 |
| Popcambo Limited | Hospitality | 2026 |
| Poplar Garage (Sussex) Limited | Real estate | 1989 |
| Poplar Resourcing Limited | Information & communication | 2013 |
| Popsot Limited | Hospitality | 2025 |
| Popular Kitchen Limited | Hospitality | 2021 |
| Porigama Ltd | Information & communication | 2025 |
| Port-Cros Limited | Administrative & support | 2007 |
| Porta Health Ltd | Administrative & support | 2026 |
| Portal Biotech Limited | Professional & scientific | 2021 |
| Portchester Design and Build Limited | Construction | 2014 |
| Portchester Estates Limited | Administrative & support | 2011 |
| Portchester Homes Limited | Construction | 2017 |
| Portchester Limited | Construction | 2017 |
| Portpop Holding Limited | Real estate | 2024 |
| Portsdown MOT Test Centre Limited | Administrative & support | 2004 |
| Postford Mill Management Company Limited | Households | 1996 |
| Potentialu Education Ltd | Education | 2026 |
| Pottsmr Limited | Professional & scientific | 2026 |
| Poujoulat (UK) Limited | Manufacturing | 1986 |
| Pound Close Management Limited | Households | 2006 |
| Pound Field (Guildford) Management Company Limited | Households | 1989 |
| Powell Creative Studios Limited | Professional & scientific | 2020 |
| Power Back International Capital Limited | Manufacturing | 2023 |
| Power Cable Consulting Limited | Professional & scientific | 2019 |
| Power of Attorney Online Ltd | Other services | 2024 |
| Power Optics Ltd | Manufacturing | 2026 |
| Power Systems Service Limited | Administrative & support | 2011 |
| Power Systems Service Projects Limited | Professional & scientific | 2017 |
| Powerback Ltd | Construction | 2009 |
| Poyle Terrace Management Company Limited | Households | 2017 |
| PP Academy Limited | Education | 2013 |
| PP2 Ltd | Real estate | 2009 |
| PPC Stars Limited | Professional & scientific | 2014 |
| PPL Consultancy Limited | Information & communication | 2025 |
| PPM Services Ltd | Construction | 2024 |
| Practical Approach Limited | Professional & scientific | 2019 |
| Practice Management & Development Ltd | Professional & scientific | 1995 |
| Praeco Limited | Information & communication | 2019 |
| Prbk Ltd | Professional & scientific | 2018 |
| Precision Car Service Ltd. | Wholesale & retail | 2017 |
| Precision Cooling Solutions Ltd | Construction | 2026 |
| Prees Daily Ltd | Wholesale & retail | 2026 |
| Premier Cars (Surrey) Ltd | Transport & logistics | 2013 |