| PCC Healthcare Limited | Health & social care | 2014 |
| PCD Media (East Anglia) Limited | Manufacturing | 2004 |
| Pcgh Limited | Real estate | 2013 |
| Pci-Pal (U.K.) Limited | Information & communication | 2000 |
| Pci-Pal PLC | Information & communication | 1999 |
| PDM Events Ltd | Arts & recreation | 2008 |
| PDS Service Ltd | Transport & logistics | 2010 |
| Peabody Studio Ltd | Wholesale & retail | 2021 |
| Peach Box Limited | Professional & scientific | 2025 |
| PEAK13 Potential Ltd | Information & communication | 2024 |
| Peakmedia ADS Ltd | Information & communication | 2026 |
| Peaks Stays Limited | Real estate | 2023 |
| Pear Tree Mews (Finborough) Management Company Limited | Households | 2014 |
| Pearl and BOW Ltd | Wholesale & retail | 2019 |
| Pearl of Atlantis Ltd | Wholesale & retail | 2019 |
| Pearl of Care Limited | Health & social care | 2017 |
| Pearlly Limited | Health & social care | 2018 |
| Peartree & Brown Limited | Real estate | 2016 |
| Peartree Lettings & Property Management Ltd | Extraterritorial | 2023 |
| PEB Fire Protection Design Services Limited | Public administration | 2011 |
| Pebben Ltd | Professional & scientific | 2015 |
| Pebble Retreats Limited | Hospitality | 2025 |
| Peckuk Limited | Administrative & support | 2013 |
| Pedal Power Cycles Limited | Manufacturing | 2012 |
| Peekabooks Ltd | Administrative & support | 2025 |
| Peewit Caravans Limited | Hospitality | 1965 |
| Pegasus Developments (East Anglia) Limited | Construction | 1996 |
| PEGS2006 Limited | Transport & logistics | 2021 |
| Peking Palace 103 Ltd | Hospitality | 2024 |
| Pelhamwalk Limited | Professional & scientific | 1979 |
| Pelican Design & Solutions Ltd | Professional & scientific | 2025 |
| Penalty 2 Limited | Wholesale & retail | 2020 |
| Penang Investment Corporation Limited | Professional & scientific | 2000 |
| Penbale Limited | Administrative & support | 1994 |
| Pendella Ltd | Wholesale & retail | 2024 |
| Penguin London Ltd | Hospitality | 2015 |
| Penguinabc Ltd | Information & communication | 2025 |
| Penielsense Ltd | Manufacturing | 2025 |
| Peninsula (EA1) Management Company Limited | Households | 2009 |
| Peninsula Advisory Ltd | Professional & scientific | 2026 |
| Penn Packaging Limited | Administrative & support | 1996 |
| Penney Inns Ltd | Hospitality | 2023 |
| Pennikkity Limited | Arts & recreation | 2007 |
| Penny Corner Cafe Ltd | Hospitality | 2026 |
| Penny Jones Pilates Limited | Arts & recreation | 2009 |
| Penny Limited | Financial services | 2019 |
| Penrocs Limited | Education | 2025 |
| Penta Aspire Limited | Professional & scientific | 2025 |
| Penta Assets Limited | Real estate | 2026 |
| Penta Home Solutions Limited | Real estate | 2023 |
| Pentagon Transit Ltd | Transport & logistics | 2024 |
| Pentosoft UK Ltd | Information & communication | 2009 |
| Peoca Ltd | Professional & scientific | 2023 |
| People Machines Limited | Real estate | 2017 |
| People Value Research Ltd | Professional & scientific | 2022 |
| PEPI1966 Limited | Transport & logistics | 2021 |
| Peptigenlabs Ltd | Wholesale & retail | 2026 |
| PER Partners LLP | | 2009 |
| Perceptive IT Limited | Information & communication | 2017 |
| Percival Property Maintenance Ltd. | Construction | 2013 |
| Perfect 10 UK Limited | Hospitality | 2005 |
| Perfect Workplace Ltd | Administrative & support | 2019 |
| Perfection in Paint Ltd | Wholesale & retail | 2024 |
| Performancefixx Limited | Administrative & support | 2017 |
| Perite Building Company Limited | Construction | 2016 |
| Perite Properties Limited | Real estate | 2019 |
| Perkbest Limited | Professional & scientific | 1987 |
| Perpetua Wealth Partners Limited | Financial services | 2020 |
| Perpetual Star Properties Ltd | Real estate | 2024 |
| Perrin Freight Services Limited | Professional & scientific | 2004 |
| Perrin Group Holdings Limited | Transport & logistics | 1997 |
| Perry Equipment (UK) Ltd | Manufacturing | 1961 |
| Persephone Consulting Limited | Administrative & support | 2010 |
| Perseverance Farm Limited | Agriculture & fishing | 1997 |
| Persolo Ltd | Wholesale & retail | 2026 |
| Persona Toys Ltd | Wholesale & retail | 2019 |
| Personal Paper Limited | Wholesale & retail | 2009 |
| Personal Touch Property Management Ltd | Real estate | 2023 |
| Pertwee Estates Ltd | Real estate | 1934 |
| Pervasive PR Limited | Professional & scientific | 2002 |
| Pet Health & Wellness Centre Limited | Professional & scientific | 2013 |
| Pet Pros Ltd | Water & waste | 2024 |
| Petcris Transport Limited | Transport & logistics | 2020 |
| Pete Dadds Photography Ltd | Professional & scientific | 2004 |
| Pete Dale Ltd | Administrative & support | 2024 |
| Pete Miller 5 Limited | Information & communication | 2012 |
| Peter Ackermann Shop Ltd | Wholesale & retail | 2025 |
| Peter Collings Ltd. | Professional & scientific | 2018 |
| Peter Fenwick & Co Limited | Real estate | 2017 |
| Peter Frost Welding Ltd | Administrative & support | 2020 |
| Peter G Harper Associates Ltd | Construction | 2016 |
| Peter Nowosad Limited | Wholesale & retail | 2008 |
| Peter Tetley Accounting Services Ltd | Professional & scientific | 2018 |
| Peter Waring Limited | Professional & scientific | 1964 |
| Peterholland Ltd | Information & communication | 2020 |
| Petersfield House Ltd | Professional & scientific | 2018 |
| Petoria Homes Ltd | Manufacturing | 2025 |
| Petre Transporter Ltd | Administrative & support | 2016 |
| Petroshenko Ltd | Transport & logistics | 2025 |
| Pettit Property Partnership LLP | | 2022 |