| PCC Traffic Information Consultancy Limited | Other services | 2006 |
| Pcctic Holdings Limited | Professional & scientific | 2012 |
| Peachey Telecoms Ltd | Information & communication | 2025 |
| Peak HSE Limited | Professional & scientific | 2010 |
| Peaks Lane Management Co. Ltd | Households | 2017 |
| Pearl Analytics Limited | Information & communication | 2015 |
| Peckover Homes Ltd | Real estate | 2026 |
| Pecunia Capital Partners Limited | Professional & scientific | 2026 |
| Peggy RAY Holding Limited | Financial services | 2024 |
| PEI Yang House Ltd | Hospitality | 2026 |
| PEK Consultancy UK Ltd | Professional & scientific | 2025 |
| Penam Ltd | Other services | 2024 |
| Penam Properties Ltd. | Real estate | 2012 |
| Pendery Architecture & Heritage Ltd | Professional & scientific | 2015 |
| Penny Carter Consultancy Limited | Professional & scientific | 2024 |
| Penny Waterman School of Dance Ltd | Administrative & support | 2009 |
| Peony Alexander Limited | Manufacturing | 2025 |
| People Momentum Limited | Administrative & support | 2026 |
| People Spark Limited | Professional & scientific | 2020 |
| People Welfare Association UK | Health & social care | 2018 |
| People's Theatre Collective Ltd | Arts & recreation | 2009 |
| Peoples Place Management Company Limited | Households | 2004 |
| Peoples Roofing Limited | Construction | 2026 |
| Pepperprint Banbury Limited | Manufacturing | 2011 |
| Peptalk Training & Development Limited | Professional & scientific | 2008 |
| Pereira-Newton Ltd | Transport & logistics | 2025 |
| Perfect Storm Ltd | Information & communication | 2018 |
| Performance Refinishing Limited | Wholesale & retail | 2009 |
| Perimeter Plus Ltd | Real estate | 2025 |
| Periscope Group Limited | Administrative & support | 2001 |
| Perjink Research & Editorial Services Ltd | Information & communication | 2010 |
| Permanent Shuttering Systems Limited | Construction | 1993 |
| Perpetual Group Limited | Professional & scientific | 2018 |
| Pete's Banbury Ltd | Transport & logistics | 2014 |
| Peter & S Building Services Ltd | Construction | 2025 |
| Peter French Mechanical Services Ltd | Wholesale & retail | 2024 |
| Peyrouat Ltd | Professional & scientific | 2020 |
| PGC Holdings Limited | Real estate | 1988 |
| PGD Intl Limited | Transport & logistics | 2020 |
| Pharmaforce Recruitment Limited | Administrative & support | 2022 |
| Pharmed UK Ltd | Health & social care | 2023 |
| Phatum Cleaning Services Ltd | Administrative & support | 2026 |
| Phil Charles Engineering and Management Services Ltd | Professional & scientific | 2023 |
| Phil Oliver Solutions Limited | Professional & scientific | 2010 |
| Philip Picking Procurement Services Limited | Professional & scientific | 2024 |
| Philip T English International Financial Services Limited | Financial services | 1986 |
| Philips Farm Ltd | Wholesale & retail | 2023 |
| Phillips Joinery Holdings Ltd | Financial services | 2025 |
| PHK Property Ltd | Real estate | 2019 |
| Phoenix Sport and Exercise Medicine Limited | Health & social care | 2011 |
| Phoenixx Cars Ltd | Transport & logistics | 2012 |
| Photon Lines Limited | Professional & scientific | 2003 |
| Phrontis Limited | Information & communication | 1994 |
| Phynova Group Limited | Professional & scientific | 2004 |
| Phynova Innovation Limited | Professional & scientific | 2017 |
| Phynova Limited | Professional & scientific | 2002 |
| Phynova PRC Ltd | Professional & scientific | 2025 |
| Pickle Ultrasound Ltd | Health & social care | 2025 |
| Pigeon PR Limited | Professional & scientific | 2020 |
| Pilio Limited | Information & communication | 2011 |
| PIM Electrical Ltd | Manufacturing | 2019 |
| Pimes PBM Limited | Professional & scientific | 2025 |
| Pineapple BUN UK Ltd | Wholesale & retail | 2022 |
| Pinhill Freehold Management Limited | Households | 2011 |
| Pink & White Nail HA Ltd | Other services | 2024 |
| Pink Flamingo Social Limited | Professional & scientific | 2024 |
| Pinkwells Limited | Real estate | 2020 |
| Pinnacle Carpentry Services Ltd | Construction | 2015 |
| Pinnacle Financial Ltd | Professional & scientific | 2015 |
| PIP and Pantalaimon Limited | Manufacturing | 2016 |
| Pip's Finds Limited | Professional & scientific | 2014 |
| Piste Consulting Limited | Information & communication | 2019 |
| Pitbitz Limited | Administrative & support | 2006 |
| Pitlane Development Ltd | Education | 2022 |
| Pitlane Links Ltd | Arts & recreation | 2017 |
| Pitstop Digital Limited | Information & communication | 2002 |
| Pixant Limited | Professional & scientific | 2018 |
| Pizza Calzone Limited | Hospitality | 2020 |
| Pizza Trading Co Limited | Extraterritorial | 2014 |
| PJ Brown Consulting Ltd | Professional & scientific | 2015 |
| PJW Properties Limited | Real estate | 2009 |
| PKC Business Leadership Ltd | Professional & scientific | 2016 |
| PL Tran-S Ltd | Transport & logistics | 2019 |
| Plant Management Consultancy Limited | Professional & scientific | 2007 |
| Plant Property Investments Limited | Real estate | 2010 |
| Plastic Parts Direct Limited | Manufacturing | 2003 |
| Plastic Parts Medical Limited | Manufacturing | 2021 |
| Play More Golf Limited | Arts & recreation | 2013 |
| Playcode Tech Ltd | Information & communication | 2025 |
| Playko Limited | Information & communication | 2000 |
| PLG Management Consulting Limited | Professional & scientific | 2010 |
| Plume Consultancy Limited | Professional & scientific | 2013 |
| Plumstead Atelier Ltd | Wholesale & retail | 2025 |
| Pluris AI Limited | Information & communication | 2024 |
| Plus TEN Care Limited | Information & communication | 2024 |
| PMC Music Enterprises Limited | Arts & recreation | 2019 |
| PMC Safety Limited | Construction | 2025 |
| Pmcp Asset Management Limited | Real estate | 2024 |
| Pmincheva Ltd | Transport & logistics | 2025 |
| Pnjm Properties Ltd | Real estate | 2021 |