| Phil Pryor Consulting Ltd | Professional & scientific | 2014 |
| Philcrest Investments and Consulting Limited | Professional & scientific | 2006 |
| Philip Grahame International Limited | Manufacturing | 1982 |
| Philip Robarts Limited | Health & social care | 2012 |
| Philip Wilkinson Ltd | Professional & scientific | 2025 |
| Phillip Balne Sealants Limited | Construction | 2005 |
| Phillips Celebrants Limited | Administrative & support | 2016 |
| Phipps Contracting Ltd | Construction | 2018 |
| Phoelantis Limited | Information & communication | 2026 |
| Phoenix Academy of Acupuncture & Herbal Medicine Ltd | Education | 2015 |
| Phoenix Environmental Management Ltd | Water & waste | 2018 |
| Phoenix Financial Public Relations Limited | Professional & scientific | 2005 |
| Phoenix I Limited | Professional & scientific | 2020 |
| Phoenix II F&A Limited | Information & communication | 2021 |
| Phoenix III Limited | Information & communication | 2021 |
| Phoenix Independent Ophthalmics Limited | Administrative & support | 1997 |
| Phoenix Itech Limited | Information & communication | 2023 |
| Phoenix Knights Limited | Wholesale & retail | 2021 |
| Phoenix Medical Group Ltd | Manufacturing | 2013 |
| Phoenix Medical Ltd. | Wholesale & retail | 2014 |
| Phoenix Nutriscience Ltd. | Wholesale & retail | 2013 |
| Phoenix Park Property Investments Limited | Real estate | 2021 |
| Phoenix Partner Alliance Ltd | Administrative & support | 2024 |
| Phoenix Pet Cremations Limited | Other services | 2021 |
| Phoenix Properties (ENG) Ltd | Real estate | 2021 |
| Phoenix Property & Co Ltd | Real estate | 2024 |
| Phoenix Security (Essex) Limited | Administrative & support | 2008 |
| Phoenix Synergy Limited | Education | 2025 |
| Phoenix-Leonard Property Services Ltd | Real estate | 2021 |
| Phones & Gadgets Limited | Wholesale & retail | 2020 |
| Photonbikes Limited | Wholesale & retail | 2025 |
| Physio Nurture Ltd | Health & social care | 2014 |
| Physio Spec Ltd | Health & social care | 2024 |
| Physiofun Ltd | Health & social care | 2014 |
| Phytonic Ltd | Professional & scientific | 2024 |
| Pi'It Limited | Information & communication | 2018 |
| PIA Global Holdings Limited | Professional & scientific | 2021 |
| Piano Piano Drinks Ltd | Wholesale & retail | 2024 |
| PIC ME Entertainments Limited | Arts & recreation | 2016 |
| Piccadilly Property & Management Company Limited | Real estate | 2006 |
| Piccadilly Wealth Management Limited | Financial services | 2020 |
| Piccadilly Whip Catering Limited | Hospitality | 2001 |
| Piccolo Forno Ltd | Manufacturing | 2017 |
| Pickhurst Properties Limited | Real estate | 2013 |
| Pickperx Limited | Transport & logistics | 2020 |
| Pickstar Active Pathways Limited | Information & communication | 2020 |
| Picpix Limited | Professional & scientific | 2007 |
| Pics Global Consultants Ltd | Professional & scientific | 2021 |
| Pics Global Ltd | Information & communication | 2013 |
| Picture Frame Properties Ltd | Real estate | 2022 |
| Picturerex Limited | Professional & scientific | 2015 |
| PIE Growth Holdings Ltd | Information & communication | 2025 |
| PIG and Whistle Essex Holdings Limited | Real estate | 2021 |
| PIG and Whistle Essex Limited | Hospitality | 2016 |
| Piggin the Dream Ltd | Agriculture & fishing | 2010 |
| Piglets and Friends Preschool Ltd | Health & social care | 2023 |
| Pilgrims Baddow Limited | Professional & scientific | 2003 |
| Pillbox Limited | Wholesale & retail | 1991 |
| Pilotmaria Limited | Extraterritorial | 2017 |
| Pimento Technologies Limited | Transport & logistics | 2025 |
| PIN CM Ltd | Construction | 2016 |
| Pinder London Limited | Professional & scientific | 2026 |
| Pine Walk Properties Ltd | Real estate | 2025 |
| Pines and Hemlock Ltd | Administrative & support | 2024 |
| Pink Cloud Consulting Ltd | Information & communication | 2018 |
| Pink Door Properties Ltd | Real estate | 2013 |
| Pink Hall Creative Services Limited | Administrative & support | 2020 |
| Pink Marketing Consultancy Limited | Information & communication | 2020 |
| Pink Mortgage Solutions Limited | Financial services | 2022 |
| Pink Rose Limited | Real estate | 2010 |
| Pinkfishes Limited | Wholesale & retail | 2017 |
| Pinnacle Care and Support Services Ltd | Health & social care | 2018 |
| Pinnacle Supported Accommodation Ltd | Hospitality | 2023 |
| Pinnacle Wholesale Ltd | Wholesale & retail | 2024 |
| Pinpaluk Ltd | Wholesale & retail | 2023 |
| Pinto's M.B Limited | Real estate | 2009 |
| Pioneer Fabrications Limited | Manufacturing | 2004 |
| PIP Sportswear Ltd | Wholesale & retail | 2024 |
| Pipeline Drain Solutions Ltd | Water & waste | 2008 |
| Piper Property Maintenance Ltd | Construction | 2018 |
| Piper Property Management Ltd | Households | 2018 |
| Pipers of Danbury Limited | Other services | 2020 |
| Pixelworks Creative Ltd | Information & communication | 2025 |
| Pixsoo Limited | Hospitality | 2025 |
| Pizza Hot Trading Ltd | Hospitality | 2023 |
| Pizza Stop Essex Ltd | Hospitality | 2025 |
| Pizzaroo Ltd | Hospitality | 2025 |
| PJ Groceries Ltd | Wholesale & retail | 2011 |
| PJ Investment Consultants Ltd | Real estate | 2014 |
| PJC Brickwork Ltd | Construction | 2025 |
| PJL Scaffolding Limited | Construction | 2014 |
| PJP Property Investments Limited | Financial services | 2014 |
| PJR Plumbing & Heating Limited | Construction | 2018 |
| Pkafl Prop Limited | Real estate | 2016 |
| PKC Retail Ltd | Wholesale & retail | 2010 |
| PL Worldwebs Ltd | Information & communication | 2023 |
| PLACE4ME Limited | Construction | 2004 |
| Plain Sight Projects Ltd | Administrative & support | 2024 |
| Plane Justice Limited | Other services | 2017 |
| Plane Properties Limited | Real estate | 1998 |