| PFS Engineering Services Ltd | Professional & scientific | 2017 |
| PG Auto Repairs Ltd | Wholesale & retail | 2012 |
| PG Quantity Surveying Limited | Professional & scientific | 2019 |
| PG Telecoms Services Limited | Information & communication | 2019 |
| PGB Ventures Limited | Hospitality | 2020 |
| PGL Consulting Ltd | Information & communication | 2019 |
| PGM Big Data Limited | Information & communication | 2016 |
| PH Bloodstock Ltd | Professional & scientific | 2022 |
| PH3 GAS Limited | Construction | 2026 |
| Phaeris Consulting Limited | Information & communication | 2017 |
| Pharma-Eng Consulting Limited | Professional & scientific | 2021 |
| Pharmaceutical Technology Centre Ltd | Manufacturing | 2022 |
| Pharmascribe Limited | Administrative & support | 2024 |
| Pharmatesh Ltd | Administrative & support | 2023 |
| Pharmhero Ltd | Health & social care | 2017 |
| Pharminspire Ltd | Administrative & support | 2017 |
| Phase Engineering Ltd | Administrative & support | 2011 |
| Phat Beauty Cosmetics Ltd | Wholesale & retail | 2023 |
| Phat Beauty Ltd | Wholesale & retail | 2019 |
| PHD (Nominees) Limited | Financial services | 2008 |
| PHD Equity Partners DPM Debt SPV NO.1 LP | | 2012 |
| PHD Equity Partners Fund NO. 2A LP | | 2015 |
| PHD Equity Partners Fund NO. 2B LP | | 2015 |
| PHD Equity Partners Fund NO. 2C LP | | 2015 |
| PHD Equity Partners Fund NO. 2D LP | | 2015 |
| PHD Equity Partners Fund NO. 2E LP | | 2015 |
| PHD Equity Partners Fund NO. 2F LP | | 2015 |
| PHD Equity Partners Fund NO.1 L.P. | | 2008 |
| PHD Industrial Holdings Limited | Financial services | 2021 |
| PHD Ventures 2 Limited | Financial services | 2020 |
| PHD Ventures LLP | | 2005 |
| Phicon Ltd | Professional & scientific | 2022 |
| Phil Archer Limited | Arts & recreation | 2006 |
| Phil Trew Consultancy Ltd | Professional & scientific | 2020 |
| Phil Warren Commissioning Services Limited | Professional & scientific | 2014 |
| Philcore Consulting UK Ltd | Professional & scientific | 2017 |
| Phileus Limited | Professional & scientific | 2018 |
| Philip Mcgucken Ltd | Health & social care | 2011 |
| Philip Norbury Limited | Information & communication | 2004 |
| Philip Rutter Ltd | Administrative & support | 2023 |
| Philip Watson Associates Ltd | Information & communication | 2022 |
| Philip Williams (G INS) Management Limited | Financial services | 2018 |
| Philippa Kirkpatrick Ltd | Administrative & support | 2022 |
| Philpro Drawing Services Limited | Professional & scientific | 1995 |
| Philsan Plumbing Limited | Construction | 2021 |
| Phoebe Allen Property Ltd | Real estate | 2025 |
| Phoenix Charm Ltd | Information & communication | 2015 |
| Phoenix Composite Services Ltd | Professional & scientific | 2018 |
| Phoenix Hire Safety Services Limited | Administrative & support | 2000 |
| Phoenix Labs Ltd. | Information & communication | 2017 |
| Phoenix Lofts and Property Maintenance Ltd | Construction | 2025 |
| Phoenix Safety Services Limited | Professional & scientific | 1996 |
| Phoenix Site Welfare Solutions Ltd | Administrative & support | 2022 |
| Phones Corner Ltd | Wholesale & retail | 2024 |
| Photech Limited | Professional & scientific | 2018 |
| Photoric Ltd | Information & communication | 2003 |
| Phyre Limited | Information & communication | 2010 |
| Physical Edge Investments Limited | Real estate | 2015 |
| PI Piping Inspection Limited | Administrative & support | 2015 |
| PIA Leisure Limited | Hospitality | 2026 |
| Piako Investments Limited | Financial services | 2017 |
| PIC Consulting Ltd | Professional & scientific | 2017 |
| Pick Engineering Limited | Professional & scientific | 2016 |
| Pickle JAR Property Ltd | Real estate | 2024 |
| Pickwick Cyber Limited | Information & communication | 2017 |
| Picow Developments Limited | Construction | 2022 |
| Picton Consulting Ltd | Administrative & support | 2025 |
| Pidgen Wood Ltd | Agriculture & fishing | 2025 |
| Piercings@Salsa Ltd | Other services | 2025 |
| Pierpoint Project Management Limited | Construction | 2020 |
| PIG Developments Limited | Real estate | 2022 |
| Pike Consulting Limited | Administrative & support | 2014 |
| Pilch Production Engineering Ltd | Professional & scientific | 2020 |
| Pili Pala Consulting Limited | Professional & scientific | 2012 |
| Pillo Ltd | Manufacturing | 2025 |
| Pillo Wood Fibre Ltd | Manufacturing | 2025 |
| Pimco Artificial Grass Company (UK) Limited | Administrative & support | 2020 |
| Pimco Contemporary Living Landscapes Limited | Professional & scientific | 2023 |
| Pineapple Landscapes Limited | Administrative & support | 2013 |
| Pines Apparel Limited | Wholesale & retail | 2026 |
| Pinetech IT Limited | Administrative & support | 2024 |
| Pineways (Appleton) Residents Association Limited | Households | 1974 |
| Pinfold Manor Farmhouse Management Company Limited | Households | 2025 |
| Ping-Hr Ltd | Administrative & support | 2020 |
| Pink Parrot.Co.Uk Limited | Wholesale & retail | 2003 |
| Pink Sky Communications Limited | Information & communication | 2024 |
| PINNACLE360 Limited | Real estate | 2016 |
| Pinnacley Limited | Wholesale & retail | 2025 |
| Pinpoint Group Recruitment Ltd | Administrative & support | 2020 |
| Piotr Grzelczak Transport Limited | Transport & logistics | 2017 |
| PIP Robyn Design Ltd | Administrative & support | 2023 |
| Pipe Engineering Support Limited | Administrative & support | 2013 |
| Pipeology Manchester Ltd | Construction | 2025 |
| Piper Boyd Project Management Limited | Administrative & support | 2023 |
| Pipesmart Plumbing and Heating Limited | Construction | 2021 |
| Pipesteam Limited | Arts & recreation | 2026 |
| Pipework & Mechanical Projects Limited | Construction | 2014 |
| Piping and Mechanical Engineering Ltd | Professional & scientific | 2020 |
| Piping Stress Services Ltd | Professional & scientific | 2023 |
| Pipp'Nbelle Dog Grooming Ltd | Other services | 2023 |