| Presanella 5 Limited | Real estate | 2016 |
| Presanella 6 Limited | Financial services | 2016 |
| Presanella 7 Limited | Financial services | 2010 |
| Presanella 8 Limited | Health & social care | 2017 |
| Prescott Portfolio Group Ltd | Hospitality | 2026 |
| Pressreset Ltd | Information & communication | 2018 |
| Pressurepro Boilers Ltd | Construction | 2025 |
| Prestige Garden Services London Limited | Administrative & support | 2023 |
| Prestige Health Care & Training Services Ltd | Health & social care | 2019 |
| Prestige Sourcing Limited | Other services | 2010 |
| Prestigehomeuk Ltd | Construction | 2012 |
| Prestwell Limited | Real estate | 2000 |
| PRI Engineering Limited | Professional & scientific | 2019 |
| Prianu Limited | Real estate | 2020 |
| Price Drop Clearance Ltd | Wholesale & retail | 2026 |
| Priest Stonework and Restoration Ltd | Construction | 1997 |
| Priest Stonework Limited | Real estate | 2004 |
| Priestlands Property Company Limited | Real estate | 2015 |
| Prima Install Ltd | Construction | 2004 |
| Prima Tapes & Labels Ltd | Administrative & support | 1979 |
| Prima Tapes and Labels Group Limited | Professional & scientific | 2018 |
| Prime Actuarial Ltd | Professional & scientific | 2025 |
| Prime Consulting Limited | Information & communication | 2014 |
| Prime MG Ltd | Real estate | 2017 |
| Prime Performance Coaching Ltd | Manufacturing | 2020 |
| Prime PRE Loved Ltd | Wholesale & retail | 2026 |
| Prime Software Limited | Professional & scientific | 1998 |
| Primebooks & Advisory Ltd | Professional & scientific | 2025 |
| Primelloyd Group Limited | Administrative & support | 2025 |
| Primerange Ltd | Wholesale & retail | 2021 |
| Primetime Resources Limited | Real estate | 1995 |
| Primetrust Consulting Limited | Professional & scientific | 2025 |
| Primewise Tech Ltd | Information & communication | 2021 |
| Primrose Realty Ltd | Real estate | 2017 |
| Princes Gate Property Investments Ltd | Hospitality | 2014 |
| Printlifestudio Ltd | Manufacturing | 2022 |
| Priorsford General Services Limited | Administrative & support | 2026 |
| Priscilla Peixoto Ltd | Health & social care | 2023 |
| Prism Shift Limited | Professional & scientific | 2025 |
| Prism Technology Solutions Limited | Information & communication | 2018 |
| Prisma Infotech Limited | Information & communication | 2024 |
| Pristine Property Management Limited | Real estate | 2019 |
| Private Practice Hub Limited | Information & communication | 2011 |
| Private Square Ltd | Professional & scientific | 2025 |
| Private Wealth Consultancy (2025) Ltd | Professional & scientific | 2025 |
| Priyadarshee Properties Ltd | Real estate | 2023 |
| Pro Academy Footballers Ltd | Arts & recreation | 2020 |
| Pro Electrical London Ltd | Construction | 2019 |
| Pro Impact Fitness Limited | Administrative & support | 2014 |
| Pro Insight Services Limited | Health & social care | 2025 |
| Pro-Clad Ltd | Construction | 2019 |
| Pro-Vision Construction & Landscaping Ltd | Construction | 2025 |
| Probuild Heating Limited | Construction | 2017 |
| Processly Ltd | Information & communication | 2023 |
| Proco Services Limited | Construction | 1997 |
| Prodbyafterhours Ltd | Information & communication | 2025 |
| Prodecsam Limited | Construction | 2015 |
| Prodigious Properties Limited | Real estate | 2019 |
| Product Link Ltd | Energy | 2021 |
| Professional Talent Consulting Limited | Administrative & support | 2022 |
| Profit First Pro Consultants Ltd | Professional & scientific | 2011 |
| Progressive PVT Ltd | Information & communication | 2026 |
| Project 2 Properties Limited | Construction | 2017 |
| Project Green Group Ltd | Construction | 2024 |
| Project Manager Jobs Limited | Professional & scientific | 2016 |
| Project Track Ltd | Information & communication | 2014 |
| Projects & Analysis Limited | Information & communication | 2023 |
| Projects Palace Ltd | Professional & scientific | 2006 |
| Promav Advisory Ltd | Professional & scientific | 2019 |
| Prompt Plumbing and Heating Ltd | Construction | 2014 |
| Prop T Solutionz Ltd | Information & communication | 2025 |
| Propa Paws K9 Fertility & Stud Services Ltd | Agriculture & fishing | 2026 |
| Propbrook Limited | Manufacturing | 1979 |
| Propen Limited | Wholesale & retail | 2017 |
| Property Chiefs Limited | Real estate | 2019 |
| Property Perfect Solutions (PPS) Limited | Construction | 2016 |
| Property Resolve Ltd | Real estate | 2018 |
| Property Sourcing UK ADA Limited | Wholesale & retail | 2025 |
| Property Stalker Limited | Information & communication | 2025 |
| Property Wealth Builders Ltd | Professional & scientific | 2023 |
| Propertydoneright Ltd | Real estate | 2024 |
| Proplumb & Heating Services Limited | Construction | 2005 |
| Propportunities Limited | Information & communication | 2019 |
| Prosper Ventures Ltd | Information & communication | 2019 |
| Proton Energy Solutions Ltd | Construction | 2025 |
| PROV47 Ltd | Health & social care | 2024 |
| Provence Wine Limited | Wholesale & retail | 2020 |
| Provision F M Ltd | Professional & scientific | 2019 |
| PS 5 Trading Limited | Wholesale & retail | 2026 |
| PS Applications Limited | Construction | 2022 |
| PS Arttile Ltd | Construction | 2025 |
| PSA Construction Services Ltd | Construction | 2018 |
| PSA Property and Development Limited | Construction | 2022 |
| Psjc Properties Ltd | Real estate | 2020 |
| Psycho-Massage Therapy (U.K.) Limited | Health & social care | 1991 |
| Psychwell Limited | Health & social care | 2020 |
| PT Buildwell Ltd | Construction | 2024 |
| Ptme Limited | Arts & recreation | 2022 |
| PTP Design Ltd | Construction | 2022 |
| Pukka Pups Limited | Agriculture & fishing | 2026 |