| Penhill Court RTM Company Limited | Households | 2020 |
| Pennell Hart Limited | Administrative & support | 2015 |
| Pennells Creative Holdings Ltd | Real estate | 2016 |
| Penney Technical Services Ltd | Professional & scientific | 2014 |
| Penny Farthing Club Ltd | Administrative & support | 2019 |
| Penny Gore Ltd | Information & communication | 2011 |
| Penrose Fern Ltd | Real estate | 2025 |
| Pension Legacy Ltd | Financial services | 2025 |
| Penton (UK) Holdings Limited | Professional & scientific | 2007 |
| Penza Ltd | Information & communication | 2014 |
| People Finding Consultancy Limited | Administrative & support | 2024 |
| Peoplelikeyou Limited | Professional & scientific | 2004 |
| Pepperfish Limited | Extraterritorial | 2012 |
| Pepperlec Limited | Construction | 2014 |
| Peppermint Dental Limited | Health & social care | 2018 |
| Percept Imagery Ltd | Information & communication | 2018 |
| Perch Digital Limited | Information & communication | 2010 |
| Perfect Lofts Ltd | Construction | 2024 |
| Perfect Student Property Limited | Real estate | 2024 |
| Perfectly Floored Limited | Construction | 2004 |
| Perficio Solutions Limited | Administrative & support | 2009 |
| Performa Cleaning Services Limited | Administrative & support | 2010 |
| Performance Trampoline Gymnastics Academy Limited | Education | 2025 |
| Performance Warranties Limited | Other services | 2020 |
| Pericles Real Estate Ltd | Real estate | 2021 |
| Perigordean Limited | Real estate | 1986 |
| Perimeter Building Services Limited | Construction | 2016 |
| Periworld Limited | Real estate | 1986 |
| Permetech Limited | Construction | 2016 |
| Perry Kitchen Installations Limited | Construction | 2019 |
| Perry the Carpenter Limited | Manufacturing | 2011 |
| Perryair Limited | Education | 2009 |
| Persaud Silver Kravitz Limited | Real estate | 2005 |
| Person First Ltd | Professional & scientific | 2009 |
| Pet Moves Limited | Transport & logistics | 2014 |
| Pete's Pool Club Ltd | Arts & recreation | 2022 |
| Peter Camillin Transport Limited | Information & communication | 1999 |
| Peter Deadman Ltd | Information & communication | 2019 |
| Peter Evans & Associates Limited | Information & communication | 1984 |
| Peter Regan Electrical Limited | Construction | 2010 |
| Peter Woolgar Financial Planning Ltd | Financial services | 2016 |
| Peter's Hub Ltd | Wholesale & retail | 2025 |
| Peters and Co Waste Removals Ltd | Other services | 2019 |
| Peters Dean Care Ltd | Administrative & support | 2016 |
| Peters Dean Connect Ltd | Extraterritorial | 2026 |
| Peters Dean Holdings Ltd | Financial services | 2019 |
| Petra Billings Woodland Consultancy Limited | Administrative & support | 2016 |
| Petrel Furniture Limited | Manufacturing | 2013 |
| Petworth Places Limited | Professional & scientific | 2018 |
| Pewdie Productions UK Limited | Professional & scientific | 2015 |
| Pewdie UK Limited | Professional & scientific | 2015 |
| Pezzco Ltd | Information & communication | 2012 |
| PF Plumbing Services Limited | Construction | 2006 |
| PGB Acquisitions Ltd | Real estate | 2022 |
| Pgmp Limited | Professional & scientific | 2012 |
| PGS Hvac Limited | Energy | 2024 |
| Pharma Quality Services Limited | Professional & scientific | 2019 |
| PHH Accountancy Limited | Professional & scientific | 2007 |
| PHH Secretaries Limited | Administrative & support | 2022 |
| PHH Taxation Limited | Professional & scientific | 2017 |
| Phil Fessey Ltd | Manufacturing | 2014 |
| Philip Goacher Associates Limited | Professional & scientific | 2010 |
| Philip Goacher Holdings Limited | Financial services | 2020 |
| Philip Smith Finance Limited | Financial services | 2020 |
| Philip Stone Properties Limited | Real estate | 2000 |
| Phillip James Estates Ltd | Real estate | 2008 |
| Phillips Flooring (South) Ltd | Construction | 2026 |
| Phixion Media Ltd | Financial services | 2022 |
| Phoeberry Limited | Information & communication | 2022 |
| Phoenix Banquets Ltd | Hospitality | 2012 |
| Phoenix Business Limited | Administrative & support | 2007 |
| Phoenix Digital Systems (London & South West) Limited | Administrative & support | 2023 |
| Phoenix Digital Systems Limited | Administrative & support | 2016 |
| Phoenix Emergency Response Solutions Limited | Administrative & support | 2018 |
| Phoenix Mortgage Solutions (Sussex) Limited | Financial services | 2012 |
| Phoenix Nails Ltd | Other services | 2026 |
| Phoenix Software Consultants Ltd | Information & communication | 2022 |
| Photocert Limited | Information & communication | 2016 |
| Photover Ltd | Administrative & support | 2016 |
| Physical Revolution Limited | Health & social care | 2023 |
| Physio& Ltd | Health & social care | 2021 |
| Physiodent Ltd | Professional & scientific | 2006 |
| Pianuki Limited | Professional & scientific | 2022 |
| Piciu's Ltd | Transport & logistics | 2025 |
| Pickfords Organisation Limited | Information & communication | 2018 |
| Picture (UK) Limited | Wholesale & retail | 2000 |
| Pide TAS Firin Ltd | Hospitality | 2025 |
| PIE and Tech Ltd | Information & communication | 2025 |
| Pier & Pebble Stays Ltd | Hospitality | 2025 |
| Pier 2 Pier Recruitment Services Ltd | Administrative & support | 2025 |
| Pier Decorating Limited | Construction | 2023 |
| Pier to Pier Services Ltd | Extraterritorial | 2013 |
| Piersharna Ltd | Real estate | 2017 |
| Pierview Building Contractors Ltd | Manufacturing | 2014 |
| Pietra Property Limited | Real estate | 2003 |
| PIH Electrical Limited | Construction | 2019 |
| Pilgrims Accountancy Limited | Professional & scientific | 2005 |
| Pillar Visuals Ltd | Arts & recreation | 2019 |
| Pilot Light London Ltd | Arts & recreation | 2014 |
| Pinewood Preston Park Management Limited | Households | 2000 |