| Polymaths R&D Limited | Professional & scientific | 2017 |
| Ponderosa AI Limited | Information & communication | 2023 |
| Pony Road Auto Specialists Ltd | Administrative & support | 2012 |
| Pooldeck Limited | Information & communication | 2023 |
| Poole Townsend Properties Ltd | Real estate | 2017 |
| Pooler Consultancy Ltd | Professional & scientific | 2017 |
| Pop-Up Pilates Limited | Health & social care | 2013 |
| Popham Hairdressing Limited | Other services | 2010 |
| Poretal Ltd | Information & communication | 2025 |
| Port in a Storm Ltd | Hospitality | 2018 |
| Port Meadow Capital Limited | Financial services | 2003 |
| Port Meadow Developments Limited | Real estate | 2005 |
| Portfolio Properties (Oxford) Limited | Real estate | 2000 |
| Posey Holdings Ltd | Financial services | 2023 |
| Positive Property Management Ltd | Real estate | 2018 |
| Post Financial Services Ltd | Administrative & support | 2020 |
| Postmill Properties Limited | Real estate | 2022 |
| Potatote Ltd | Wholesale & retail | 2026 |
| Poulaine Ltd | Professional & scientific | 2021 |
| Poulomee Basu Ltd | Professional & scientific | 2014 |
| Pound Bottom Limited | Extraterritorial | 2023 |
| POW Social Ltd | Wholesale & retail | 2026 |
| Powell's (Home Improvements) Limited | Wholesale & retail | 1987 |
| Powell's Sheet Materials Ltd | Wholesale & retail | 2015 |
| Power Connectors Limited | Extraterritorial | 1953 |
| Powerful Vision Limited | Wholesale & retail | 2008 |
| Powerliving by Prana Limited | Arts & recreation | 2023 |
| PPA Architecture Limited | Information & communication | 2003 |
| PPS Home Improvements Limited | Construction | 2011 |
| Pragnell Property Partners Ltd | Real estate | 2025 |
| Praise Mechanical Engineering Limited | Wholesale & retail | 2023 |
| Praisetarget Limited | Construction | 1992 |
| Prama Property Services Ltd | Real estate | 2018 |
| Prana Yoga Oxford Limited | Wholesale & retail | 2019 |
| Prana Yoga Retreats and Events Ltd | Arts & recreation | 2023 |
| Praxis Change Consultants Limited | Professional & scientific | 2023 |
| Prazi Ltd | Professional & scientific | 2023 |
| Precise Medicine Consultancy Limited | Health & social care | 2025 |
| Precise Medicine Limited | Professional & scientific | 2016 |
| Precision Civil Ltd | Construction | 2025 |
| Precision Throttle Ltd | Wholesale & retail | 2023 |
| Precisionituk Limited | Information & communication | 2022 |
| Preedysbuildingservices Ltd | Construction | 2023 |
| Prefered Logistics Ltd | Wholesale & retail | 2026 |
| Prefrontal AI Ltd | Information & communication | 2025 |
| Preistcoast Ltd | Wholesale & retail | 2025 |
| Preloved Passion Studio UK Ltd | Administrative & support | 2025 |
| Prelude Services Ltd | Administrative & support | 2020 |
| Premier Moulding Machinery Limited | Manufacturing | 2017 |
| Premier Plastic Parts Limited | Manufacturing | 1995 |
| Premier Plastics Holdings Ltd | Manufacturing | 2015 |
| Premier Roofing & Gutters Limited | Construction | 2019 |
| Premier Roofing, Repairs & Maintenance Ltd | Construction | 2023 |
| Premier Scaffolding Solutions Ltd | Construction | 2024 |
| Premier Security Products Limited | Manufacturing | 2001 |
| Premier Tennis Holdings Limited | Professional & scientific | 2012 |
| Premier Tennis Limited | Arts & recreation | 2005 |
| Premium Drives and Roofing Ltd | Administrative & support | 2025 |
| Premium Pizza Ltd | Manufacturing | 2026 |
| Premium Wine Distribution Ltd | Financial services | 2026 |
| Premium Wine Holdings Ltd | Financial services | 2026 |
| Prenostics Limited | Professional & scientific | 2015 |
| Prep School Tutor Ltd | Education | 2013 |
| Presence Ltd | Professional & scientific | 2016 |
| Pressure Cooker Arts | Education | 2015 |
| Prestige Accountancy Ltd | Professional & scientific | 2018 |
| Prestige Contracting Services Limited | Construction | 2025 |
| Prestige Service Enterprises Limited | Administrative & support | 2024 |
| Pretorius Neuroradiology Ltd | Health & social care | 2018 |
| Pridmore Group Ltd | Construction | 2017 |
| Prilance Limited | Wholesale & retail | 2025 |
| Prima Managed Estates Limited | Professional & scientific | 2014 |
| Primagnet Ltd | Professional & scientific | 2022 |
| Primary Care International C.I.C. | Information & communication | 2014 |
| Prime FIX Services Ltd | Construction | 2025 |
| Prime Homestayz Limited | Real estate | 2023 |
| Prime Pathways Hiring Solutions Limited | Administrative & support | 2024 |
| Prime Pest Management Ltd | Administrative & support | 2025 |
| Prime UK Real Estate Finders Limited | Real estate | 2011 |
| Primeaxis Trading Ltd | Wholesale & retail | 2026 |
| Primeguard Security Services Ltd | Administrative & support | 2024 |
| Primesite Media Limited | Professional & scientific | 1997 |
| Primevale Global Limited | Agriculture & fishing | 2026 |
| Primevista Limited | Wholesale & retail | 2025 |
| Primrose Lynch | Financial services | 2021 |
| Princes Castle Court Management Company Limited | Households | 1995 |
| Priory Lodge Management (Wallingford) Limited | Households | 1978 |
| Privacy Shield Ltd | Information & communication | 2018 |
| Private Health Pathways Limited | Health & social care | 2025 |
| Pro Firma Limited | Professional & scientific | 2014 |
| Pro Market Shop Ltd | Wholesale & retail | 2024 |
| Probassuk Ltd | Wholesale & retail | 2022 |
| Process Control Solutions Europe Ltd | Wholesale & retail | 2024 |
| Proco Builders Ltd | Construction | 2017 |
| Proco Homes Ltd | Real estate | 2017 |
| Proco Properties Ltd | Real estate | 2019 |
| Profamily Ltd | Real estate | 2023 |
| Professional Medical Education Limited | Education | 2006 |
| Professional Medical HIP Limited | Education | 2026 |
| Professional Medical Limited | Professional & scientific | 2006 |