| Peascod Street Specsavers Limited | Wholesale & retail | 2011 |
| Pecf UK Data Centre I Limited | Real estate | 2022 |
| Peckham Specsavers Hearcare Limited | Wholesale & retail | 2025 |
| Peckham Specsavers Limited | Wholesale & retail | 1998 |
| Peckham Visionplus Limited | Wholesale & retail | 1998 |
| Pedal Power Training Limited | Education | 2012 |
| Pedal Ready Limited | Administrative & support | 2021 |
| Pedcfi Runcorn Limited | Administrative & support | 2022 |
| Peerage House Technologies Ltd | Wholesale & retail | 2023 |
| Pegasus Independent Financial Advice Ltd | Financial services | 2022 |
| PEI Properties Limited | Real estate | 2023 |
| Peiris Consultancy Ltd | Professional & scientific | 2025 |
| Peko Fitness Ltd | Information & communication | 2026 |
| PEL Gibbs Limited | Construction | 2007 |
| Pembroke Dock Specsavers Limited | Wholesale & retail | 2003 |
| Penarth Specsavers Limited | Wholesale & retail | 2006 |
| Penarth Visionplus Limited | Wholesale & retail | 2006 |
| Penelope Properties Ltd | Real estate | 2020 |
| Penfold Roofing Ltd | Construction | 2020 |
| Pengraigwen Stables and Holiday Lets Ltd | Hospitality | 2022 |
| Penguin Plumbing and Heating Ltd | Construction | 2024 |
| Penny & Wells Limited | Financial services | 2023 |
| Penrith Specsavers Limited | Wholesale & retail | 2001 |
| Pension Property Investment Limited | Real estate | 2012 |
| Pensta Ltd | Information & communication | 2025 |
| Penta Precision ENG. Limited | Manufacturing | 1997 |
| Penta Precision Holdings Limited | Financial services | 2021 |
| Pentland Logistics Ltd | Transport & logistics | 2012 |
| Pentland Plumbing Services Limited | Construction | 2005 |
| Pentrevion Fire Limited | Professional & scientific | 2016 |
| Penygroes Service Centre Ltd | Wholesale & retail | 2014 |
| Penzance Specsavers Limited | Wholesale & retail | 1993 |
| Penzance Visionplus Limited | Wholesale & retail | 1990 |
| Peopall Limited | Information & communication | 2017 |
| Peoplepush Ltd | Administrative & support | 2025 |
| Pepper Consulting Ltd | Professional & scientific | 2003 |
| Peptide Protein Research Limited | Manufacturing | 1999 |
| Peraden Consulting Limited | Information & communication | 2025 |
| Percival Aviation Limited | Manufacturing | 1979 |
| Perdue Property Services Limited | Construction | 2020 |
| Perennial Investment Limited | Administrative & support | 2017 |
| Perfect Balance Accountancy Ltd | Professional & scientific | 2018 |
| Perfect Design Limited | Construction | 2023 |
| Perfect Lofts & Homes Limited | Construction | 2005 |
| Perfect Pitch Consultancy Limited | Professional & scientific | 2009 |
| Perfect Pitch Lead Generation Limited | Administrative & support | 2018 |
| Perfect Vision Productions Ltd. | Information & communication | 2012 |
| Performance Energy Group Ltd | Financial services | 2023 |
| Performance Energy Ltd | Administrative & support | 2020 |
| Performance Leadership Ltd | Professional & scientific | 2026 |
| Perio Consulting Limited | Information & communication | 2016 |
| Peritum Pests and Services Limited | Agriculture & fishing | 2018 |
| Perlini Properties Limited | Real estate | 2024 |
| Perry Analytical Limited | Professional & scientific | 2002 |
| Personal Everest Limited | Administrative & support | 2006 |
| Personal Physio Ltd | Health & social care | 2026 |
| Personal Promise Home Care Ltd | Health & social care | 2026 |
| Perth Specsavers Limited | Wholesale & retail | 1989 |
| Perth Visionplus Limited | Wholesale & retail | 1995 |
| Petal Design Studio Limited | Manufacturing | 2026 |
| Petals Healthcare Ltd | Health & social care | 2017 |
| Pete Dunn Wills Limited | Professional & scientific | 2022 |
| Pete Dunning Logistics Ltd | Transport & logistics | 2020 |
| Peter Fenton Wealth Management Limited | Financial services | 2018 |
| Peter R Gibbon Limited | Real estate | 2016 |
| Peter Wilson Silversmiths Limited | Manufacturing | 2002 |
| Peterborough Domi Audiology Specsavers Limited | Wholesale & retail | 2025 |
| Peterborough Specsavers Hearcare Limited | Wholesale & retail | 2006 |
| Peterborough Specsavers Limited | Wholesale & retail | 1994 |
| Peterborough Visionplus Limited | Wholesale & retail | 1986 |
| Peterhead Specsavers Limited | Wholesale & retail | 2002 |
| Peterlee Specsavers Limited | Wholesale & retail | 1999 |
| Petersfield Specsavers Hearcare Limited | Wholesale & retail | 2024 |
| Petersfield Specsavers Limited | Wholesale & retail | 2011 |
| Petersham Land (Catford) Holdings Limited | Other services | 2013 |
| Petersham Land (Catford) Limited | Other services | 2009 |
| Petersham Land Limited | Real estate | 2006 |
| Petes Meats Ltd | Wholesale & retail | 2024 |
| Petr Kosek Consulting Limited | Information & communication | 2017 |
| Petrichor Properties Ltd | Real estate | 2021 |
| Pevensey Coastal Defence Limited | Construction | 1999 |
| Peveril Property Group Ltd | Real estate | 2022 |
| Pewter Software Ltd | Information & communication | 2026 |
| PF Group Holdings Ltd | Construction | 2015 |
| PFC Installations Limited | Construction | 2020 |
| Pfmway Limited | Health & social care | 2011 |
| PH Planning Consultancy Limited | Professional & scientific | 2017 |
| Phairo Music Limited | Information & communication | 2025 |
| Pharma TD Ltd | Health & social care | 2025 |
| Pharmaceutical Development Services Limited | Professional & scientific | 2002 |
| PHB Assets Limited | Financial services | 2025 |
| PHB Plant Hire Limited | Administrative & support | 2026 |
| PHB SPV1 Limited | Financial services | 2025 |
| Phelan Financial Consultants Limited | Other services | 1992 |
| Phelan Independent Financial Consultants Limited | Financial services | 1998 |
| Phenias Support Services Ltd | Other services | 2019 |
| Phil Crier Licensing Ltd | Professional & scientific | 2013 |
| Phil Lawden Limited | Wholesale & retail | 1985 |
| Philanthropic Limited | Wholesale & retail | 2025 |
| Philip J Harrison Building Surveyors Limited | Professional & scientific | 2015 |