| Penny Black Payroll & Bookkeeping Services Limited | Professional & scientific | 2017 |
| Penny Lane Management Company Limited | Real estate | 2008 |
| Penworth Property Ltd. | Real estate | 1995 |
| People Development Matters (International) Limited | Professional & scientific | 2017 |
| People Development Matters Limited | Professional & scientific | 1990 |
| People Express Taxis Rugby Limited | Transport & logistics | 2003 |
| Pepper Box (UK) Limited | Real estate | 2008 |
| Peptalk Limited | Extraterritorial | 2017 |
| Perched Cat Productions Ltd | Information & communication | 2026 |
| Perci Holdings Limited | Other services | 2017 |
| Perfect IT Limited | Information & communication | 2012 |
| Perfectly Pampered Pups and Pets Ltd | Agriculture & fishing | 2022 |
| Perfx Sports Ltd | Education | 2023 |
| Peri Limited | Wholesale & retail | 1989 |
| Perkins and Teare Limited | Hospitality | 2017 |
| Perkins Couriers Limited | Transport & logistics | 2023 |
| Pernamatic Engineering Limited | Manufacturing | 1986 |
| Perpetual Capital Management Ltd | Real estate | 2022 |
| Perpetual Construction Limited | Construction | 2016 |
| Perpetual Real Estate Limited | Construction | 2005 |
| Personal and Commercial Limited | Administrative & support | 2024 |
| Personal Leaps Ltd | Health & social care | 2024 |
| Pertici Industries UK Ltd | Manufacturing | 2013 |
| Pertici UK Ltd | Manufacturing | 2013 |
| PES Eccommerce Ltd | Wholesale & retail | 2024 |
| Peshku Holdings Ltd | Real estate | 2025 |
| Peshku Ltd | Hospitality | 2023 |
| Pet Glow Ltd | Wholesale & retail | 2024 |
| Pete's Haulage 01 Limited | Transport & logistics | 2018 |
| Pete's Van Ltd | Transport & logistics | 2025 |
| Peter Cico Ltd | Transport & logistics | 2011 |
| Peter Talbot Limited | Professional & scientific | 2008 |
| Peterbuilt Engineering Limited | Wholesale & retail | 2012 |
| Petre-Alex Construction Ltd | Construction | 2025 |
| Petsil Property Limited | Real estate | 2024 |
| Petsil Property Ventures LLP | | 2020 |
| Petticrew Estates Limited | Real estate | 2014 |
| Pettles Ltd | Wholesale & retail | 2025 |
| PF Auto Services Limited | Wholesale & retail | 2024 |
| PFP Pro Limited | Construction | 2017 |
| PG Theatre Solutions Ltd | Health & social care | 2023 |
| PGI Transport Ltd | Transport & logistics | 2018 |
| Pheonix Development Services Limited | Real estate | 2019 |
| Pherlock Limited | Information & communication | 2018 |
| PHI Design Limited | Manufacturing | 1983 |
| Phii Limited | Manufacturing | 2020 |
| Philippa's Ltd | Wholesale & retail | 2021 |
| Phoenix Capital I Ltd | Real estate | 2019 |
| Phoenix Careplus Ltd | Administrative & support | 2025 |
| Phoenix Endevours Ltd | Administrative & support | 2016 |
| Phoenix Personal Coaching Ltd | Health & social care | 2023 |
| Phoenix Services Plumbing Ltd | Construction | 2020 |
| Physio Kare Limited | Health & social care | 2009 |
| Pial Associates Ltd | Wholesale & retail | 2013 |
| Pick IT Pack IT Send IT Limited | Wholesale & retail | 2013 |
| Pickle and PIE Ltd | Hospitality | 2024 |
| Picus Limited | Transport & logistics | 2015 |
| PIG PUB Ltd | Hospitality | 2011 |
| Pillings & Co Ltd | Construction | 2012 |
| Pilotaware Limited | Information & communication | 2015 |
| Pims Consulting Limited | Information & communication | 2023 |
| Pine Croft Holdings Ltd | Financial services | 2026 |
| Pine Croft Property Ltd | Construction | 2026 |
| Pinefive Ltd | Professional & scientific | 2015 |
| Pinfold ST Properties Limited | Real estate | 2017 |
| Pingate Ltd | Real estate | 2022 |
| Pink Pearl Homeware Ltd | Wholesale & retail | 2025 |
| Pinnacle Care Ltd | Health & social care | 2000 |
| Pinpoint Sport Ltd | Information & communication | 2020 |
| PIO 30 Trans Ltd | Transport & logistics | 2015 |
| Piotr Building Ltd | Construction | 2023 |
| Piotr LIB Ltd | Transport & logistics | 2014 |
| Piotr Sciebura Company Ltd | Transport & logistics | 2018 |
| Pipeline Drinks Ltd | Financial services | 2018 |
| Piper & Meeks Developments Ltd | Construction | 2014 |
| Pipewell Court (Management) Company Limited | Real estate | 2013 |
| Pitch Architects Limited | Professional & scientific | 2017 |
| Pittville Property Management LLP | | 2014 |
| Pivora Ltd | Other services | 2025 |
| Pixcel Ltd | Professional & scientific | 2007 |
| Pixel Horizons Limited | Information & communication | 2024 |
| PJ Pipe and GAS Installations Limited | Construction | 2004 |
| PJ Trans Ltd | Transport & logistics | 2013 |
| PJL Financial Services Ltd | Financial services | 2018 |
| PK City Ltd | Transport & logistics | 2018 |
| PK Trucker Ltd | Manufacturing | 2014 |
| PKB Limited | Construction | 2018 |
| PKC Consultancies Ltd | Construction | 2025 |
| PKE Consultancy Ltd | Professional & scientific | 2019 |
| Pklm Partners Limited | Professional & scientific | 2013 |
| Pkpnk Ltd | Professional & scientific | 2021 |
| PL Maintenance Limited | Administrative & support | 2019 |
| PLACEHOLDER101 Limited | Manufacturing | 2020 |
| Plan C Plus Limited | Professional & scientific | 2010 |
| Plant ME 24 Ltd | Wholesale & retail | 2024 |
| Plant ME Ltd | Wholesale & retail | 2022 |
| Plantd Grocers Ltd | Wholesale & retail | 2025 |
| Plantology Limited | Professional & scientific | 2017 |
| Plasoka Limited | Construction | 2021 |
| Plastic Processing Systems Limited | Wholesale & retail | 2006 |