| Paragon Home Improvements Ltd | Construction | 2018 |
| Paragon Pool Services Ltd | Wholesale & retail | 2008 |
| Parcel Direct Ltd | Wholesale & retail | 2018 |
| Pareto Resources Ltd | Professional & scientific | 2013 |
| Park Display Limited | Other services | 2005 |
| Park View Estates (2018) Limited | Other services | 2018 |
| Parker Turnbull Limited | Construction | 2025 |
| Parkers European Holdings Limited | Transport & logistics | 2017 |
| Parkers European Limited | Transport & logistics | 2003 |
| Parkinsons Master Thatchers Ltd | Construction | 2009 |
| Pasadera Ltd | Professional & scientific | 2013 |
| Passionforfashion Ltd | Wholesale & retail | 2021 |
| Patelle Limited | Wholesale & retail | 2026 |
| Paul Beebee Wealth Management Ltd | Financial services | 2008 |
| Paul Castle Associates Ltd | Administrative & support | 2012 |
| Paul Gordon Design Ltd | Professional & scientific | 2024 |
| Paul Miles Plumbing & Heating Limited | Construction | 2011 |
| Pazza Pizzarella Ltd | Hospitality | 2025 |
| PBO Properties Ltd | Real estate | 2023 |
| PCP Surveyors Ltd | Professional & scientific | 2016 |
| PCS Developments Limited | Information & communication | 1984 |
| PEA Green Designs Limited | Professional & scientific | 2011 |
| PEA Green Physio Ltd | Other services | 2010 |
| Peace Nation Limited | Hospitality | 2018 |
| Pearson Brett Accountants Limited | Professional & scientific | 2011 |
| Peel Away Limited | Manufacturing | 1983 |
| Peka Foods Limited | Wholesale & retail | 1988 |
| Penbran Ltd | Professional & scientific | 2023 |
| Pendine Historic Cars Ltd | Wholesale & retail | 2014 |
| Pendula Consulting Ltd | Professional & scientific | 2021 |
| Pendulum Limited | Professional & scientific | 2023 |
| Penfolds Ecommerce Ltd | Wholesale & retail | 2023 |
| Pennard Limited | Health & social care | 2024 |
| Penrite Classic Oils Limited | Extraterritorial | 2005 |
| Penygroes Ltd | Agriculture & fishing | 2025 |
| Pepper Tech Holdings Ltd | Information & communication | 2025 |
| Perceptive Development Limited | Professional & scientific | 2013 |
| Perfect Page Ltd | Professional & scientific | 2016 |
| Perfectus Properties Limited | Real estate | 2022 |
| Performance 73 Wiring Ltd | Manufacturing | 2025 |
| Performance EV Charging Ltd | Construction | 2026 |
| Persona People Management Limited | Administrative & support | 2006 |
| Personal Displays of Affection Ltd | Other services | 2025 |
| Personas Admin Support Solutions Limited | Public administration | 2019 |
| Personas Group Limited | Financial services | 2016 |
| Perspicacity Collaboration Limited | Administrative & support | 2013 |
| Petauri UK Holdco Limited | Financial services | 2024 |
| Pete Thirtle Vehicle Services Limited | Wholesale & retail | 2018 |
| Peter O`Dell Groundwork Contractors Limited | Construction | 2005 |
| Peter Southam & SON Ltd | Construction | 2023 |
| Peter Talbot (Consultancy) Ltd | Education | 2019 |
| Peterstan Property Limited | Real estate | 2024 |
| Petit Pois Trading Limited | Wholesale & retail | 2015 |
| Petrocorus Consulting Ltd | Professional & scientific | 2024 |
| Petroleum Holdings Limited | Financial services | 2025 |
| PG Bicester Ltd | Hospitality | 2023 |
| PG Mullins & Associates Limited | Health & social care | 2025 |
| PG Source Acquisition Ltd | Financial services | 2022 |
| PH Lifestyle Consultancy Ltd | Professional & scientific | 2026 |
| Phantom Consultants Limited | Health & social care | 1998 |
| Phantom Enterprise Limited | Real estate | 2002 |
| Pharm-Ac (UK) Limited | Health & social care | 2003 |
| Pharmafill Limited | Wholesale & retail | 2015 |
| Phil Bell Consulting Ltd | Health & social care | 2015 |
| PHN Property Services Ltd | Real estate | 2023 |
| Phoenix Personal Fitness Limited | Arts & recreation | 2012 |
| Phoneland Limited | Wholesale & retail | 1993 |
| Physiotherapy & Massage Ltd | Other services | 2015 |
| Picture Utopia CIC | Professional & scientific | 2016 |
| Pierre Audoin Consultants (PAC) Limited | Professional & scientific | 2002 |
| Pimlico Air Conditioning Ltd | Administrative & support | 2017 |
| Pinch 'N' Pleat Ltd | Manufacturing | 2014 |
| Pine Tree Lodge Limited | Financial services | 2026 |
| Pinkbelt Ltd | Wholesale & retail | 2024 |
| Pinnacle Greener Homes Limited | Administrative & support | 2017 |
| PIP Pro Limited | Information & communication | 2025 |
| Pipex AB (UK) Limited | Professional & scientific | 2019 |
| Pips PB Ltd | Wholesale & retail | 2020 |
| Pisang | Health & social care | 2008 |
| Pixel Global LLP | | 2022 |
| Pixel Group Ltd | Professional & scientific | 2018 |
| Pixel Strategic Partners LLP | | 2025 |
| PJ Cleaning Services Ltd | Administrative & support | 2022 |
| PJ Sawyer Limited | Professional & scientific | 2012 |
| Pjadhd Coaching Ltd | Health & social care | 2026 |
| PJB Plastering and Rendering Ltd | Construction | 2025 |
| PK Gupta Medical Ltd | Information & communication | 2018 |
| PLAN2MOVE Limited | Real estate | 2001 |
| Planet Cocktail Limited | Manufacturing | 2024 |
| Planet Wise Limited | Administrative & support | 2003 |
| Plantation RD Flats (Freehold) Limited | Real estate | 2016 |
| Plasgene Limited | Professional & scientific | 2006 |
| Plastic Surgery Oxford Ltd | Health & social care | 2014 |
| Plating Equipment Limited | Manufacturing | 2000 |
| Platinum Hill Ltd | Professional & scientific | 2019 |
| Platinum Key Properties Limited | Real estate | 2017 |
| Play Work Studio Limited | Professional & scientific | 2025 |
| Playful Expressions Ltd | Arts & recreation | 2025 |
| Plenilune International Trade Ltd | Water & waste | 2016 |
| Plexcourt Limited | Extraterritorial | 2014 |