| Pair Date Limited | Information & communication | 2026 |
| Palmac Limited | Construction | 2014 |
| Pantaloon Interactive Ltd | Information & communication | 2024 |
| Papyrus Studios Limited | Information & communication | 2018 |
| Paramount Packaging Property Limited | Real estate | 2022 |
| Paramount Packaging Systems Limited | Wholesale & retail | 1993 |
| Parco Brands Limited | Manufacturing | 2026 |
| Park Corner Cleaning Services Limited | Administrative & support | 2022 |
| Parson ASH Limited | Construction | 1975 |
| Parsons Avenue Flat Management Company Limited | Households | 2006 |
| Part-Time Finance Director Ltd | Administrative & support | 2016 |
| Partee Pieces (Ppbb) Limited | Manufacturing | 2013 |
| Passfield Industrial Estates LLP | | 2006 |
| Pathzi Ltd | Information & communication | 2025 |
| Pattersongs Ltd. | Information & communication | 2017 |
| Payroll Executive Limited | Professional & scientific | 2012 |
| Pear Electrical Limited | Construction | 2012 |
| Pearsy Property Limited | Hospitality | 2023 |
| People Inspired Ltd | Professional & scientific | 2019 |
| Perception IT Limited | Information & communication | 2010 |
| Pereiro Netech Limited | Information & communication | 2026 |
| Perfect Balance Bookkeeping and Accounting Services Limited | Professional & scientific | 2014 |
| Pet Bereavement Services Ltd | Professional & scientific | 2019 |
| Petals and Blooms Garden Design Ltd | Administrative & support | 2017 |
| PG Lettings & Management Limited | Real estate | 2017 |
| PG Property and Lettings Ltd | Real estate | 2023 |
| PGC Education Consultancy Ltd | Education | 2024 |
| Phat Koala Ltd | Information & communication | 2019 |
| Pheasant Copse Residents Association Ltd | Households | 2014 |
| Phenix Limited | Professional & scientific | 2024 |
| Phils Drainage Services Limited | Water & waste | 2024 |
| Phineas Health Ltd | Health & social care | 2023 |
| Phoenix Footwear Ltd | Administrative & support | 2009 |
| Phoenixc Holdings Limited | Financial services | 2026 |
| Phoenixc Ltd | Construction | 2015 |
| Phoenixc North & Midlands Limited | Construction | 2017 |
| PI 4 PI Limited | Information & communication | 2009 |
| Piercing Nomad Ltd | Other services | 2025 |
| Pinewood Holdings Limited | Financial services | 2017 |
| Pinky & the Brain Ltd | Hospitality | 2025 |
| Piper Joinery Limited | Manufacturing | 2011 |
| Pivot Insight Limited | Professional & scientific | 2023 |
| Pivotal Play Paediatric Physiotherapy Ltd | Health & social care | 2025 |
| Pizza Delight Fleet Ltd | Hospitality | 2020 |
| PJB Roofing Specialists Ltd | Construction | 2021 |
| PJM Building Surveyors Ltd | Professional & scientific | 2018 |
| PJP Management Limited | Construction | 2008 |
| PJS Networks Ltd | Information & communication | 2003 |
| PK Absolute Carpentry & Joinery Ltd | Manufacturing | 2018 |
| Pk's Pet Supplies Limited | Wholesale & retail | 2024 |
| Place of Peace Ltd | Health & social care | 2024 |
| Plaice of Sole Fish and Chips Fleet Limited | Hospitality | 2025 |
| Planet Wide City Limited | Information & communication | 2010 |
| Plant Powered Babies Ltd | Manufacturing | 2018 |
| Platinum Construction and Civil Engineering Limited | Construction | 2026 |
| Platinum Crest Global Limited | Professional & scientific | 2019 |
| Platinum Property Services South Limited | Administrative & support | 2010 |
| Play Plan Ltd | Information & communication | 2026 |
| Playeristic Ltd | Information & communication | 2015 |
| PLM Associates Limited | Administrative & support | 2017 |
| Plumridge Garden Services Ltd | Administrative & support | 2024 |
| PM Meats Limited | Wholesale & retail | 2024 |
| PMO Support Ltd | Professional & scientific | 2016 |
| Policy Library Limited | Financial services | 2013 |
| Polynominal Ltd | Information & communication | 2023 |
| Pont Technologies Ltd | Information & communication | 2023 |
| Poplar Property Holdings Limited | Real estate | 2016 |
| Port Engineering Solutions Limited | Professional & scientific | 2008 |
| Porter Services (Croyde) Limited | Real estate | 1997 |
| Porter's Golf Ltd | Arts & recreation | 2014 |
| Portsmouth Apartments Group Limited | Extraterritorial | 2015 |
| POS Utilities Limited | Construction | 2022 |
| Posetiv Cloud Ltd | Information & communication | 2019 |
| Posetiv Ltd | Information & communication | 2026 |
| Pospect Medics Ltd | Health & social care | 2013 |
| Potters PUB Co Ltd | Hospitality | 2018 |
| Power Property Electrical Ltd | Construction | 2015 |
| PPB Consultancy Limited | Professional & scientific | 2024 |
| Ppbb (Doodles) Limited | Information & communication | 2013 |
| PPP Global Solutions Ltd | Administrative & support | 2025 |
| PPS Professional Property Services Limited | Administrative & support | 2005 |
| Prajñā Merakigai Ltd | Professional & scientific | 2022 |
| Pratash Consultancy Limited | Information & communication | 2022 |
| Pratchett Property Ltd | Real estate | 2021 |
| Precise Mortgages Limited | Financial services | 2012 |
| Precision Power Switches Ltd | Manufacturing | 2024 |
| Precision Staffing Limited | Health & social care | 2022 |
| Prem IT Solutions Limited | Information & communication | 2021 |
| Premiair Ventilation Limited | Construction | 2025 |
| Premium Vehicles Ltd | Wholesale & retail | 2020 |
| Prestige Education Consulting Ltd | Professional & scientific | 2023 |
| Prestige Handyman Services Ltd | Construction | 2025 |
| Preston Productions Limited | Information & communication | 2004 |
| Primal Movement Solutions Ltd | Other services | 2019 |
| Prime PC Services Ltd | Information & communication | 2025 |
| Prime Pick Collection Ltd | Wholesale & retail | 2026 |
| Primehold App Limited | Information & communication | 2026 |
| Primeshelf Ltd | Wholesale & retail | 2026 |
| Primex Business Ltd | Administrative & support | 2024 |
| Primex Cleaning Limited | Administrative & support | 2020 |