| PIZ Nair Limited | Administrative & support | 2022 |
| Pizza Hot Express Limited | Hospitality | 2012 |
| Pizza Parlour Wembley Ltd | Hospitality | 2014 |
| PJ Carey Services Ltd | Construction | 2024 |
| PJ Pro Services Ltd | Construction | 2020 |
| PJM Consultancy Ltd | Financial services | 2022 |
| Pkls (Luton) Limited | Real estate | 2025 |
| Plan 4 Estate Ltd | Professional & scientific | 2020 |
| Plan Amour Limited | Other services | 2019 |
| Plant Inspection & Certification Services Limited | Administrative & support | 2022 |
| Platinum Housing Support and Care Ltd | Health & social care | 2013 |
| Platinum Property NR14 Limited | Real estate | 2024 |
| Platinum Restructuring Services Limited | Financial services | 2014 |
| Platinum RS Limited | Financial services | 2014 |
| Platiumo Trading Limited | Wholesale & retail | 2026 |
| Play IT Inc Limited | Information & communication | 2018 |
| Playzooka Limited | Information & communication | 2020 |
| Plug & Socket Services Ltd | Construction | 2025 |
| Plumbsafe London Ltd | Construction | 2025 |
| Plymouth Partners LLP | | 2019 |
| PM Developers Ltd | Real estate | 2019 |
| PM Harvey Capital Limited | Real estate | 2021 |
| PMH Surface Co Ltd | Construction | 2025 |
| Pmse Limited | Real estate | 2023 |
| Pmtmr Limited | Real estate | 2015 |
| PND Pubs Limited | Hospitality | 2022 |
| PNP Contractors Ltd | Construction | 2019 |
| PNP60 Limited | Information & communication | 2019 |
| PO5 Investments Limited | Information & communication | 2014 |
| Pochi Limited | Real estate | 2014 |
| Podsafe Ltd | Information & communication | 2026 |
| Poetstyle Limited | Manufacturing | 1986 |
| Polsky Multimedia LLP | | 2013 |
| Pooja Mithai & Namkeen Limited | Hospitality | 2014 |
| Pooles Newsagents Ltd | Wholesale & retail | 2023 |
| Poornank Limited | Information & communication | 2019 |
| Popindo Ltd | Wholesale & retail | 2016 |
| Poppdin Limited | Professional & scientific | 2016 |
| Poppy Rose Consultancy Limited | Arts & recreation | 2017 |
| Porda Limited | Real estate | 2016 |
| Portaly Property Investments Ltd | Real estate | 2024 |
| Portline Global Ltd | Wholesale & retail | 2025 |
| Portman 23 Limited | Real estate | 2023 |
| Portman First Ltd | Real estate | 2024 |
| Portman Hall Capital Limited | Real estate | 2017 |
| Portman Hall Investments Limited | Construction | 2015 |
| Portman Sky Ltd | Real estate | 2024 |
| Portman Third Ltd | Real estate | 2024 |
| Portnall College (UK) Limited | Information & communication | 2013 |
| Portobello Gifts & Fashion Ltd | Wholesale & retail | 2023 |
| Portshade Limited | Construction | 1978 |
| Positive Branding Limited | Other services | 2011 |
| Potsky Limited | Professional & scientific | 2004 |
| Power UP Energy Drinks Limited | Wholesale & retail | 2025 |
| Power UP Gamers Energy Limited | Wholesale & retail | 2025 |
| Poweradspro Ltd | Information & communication | 2019 |
| Powerail Engineering Limited | Construction | 1998 |
| Powsky Ltd | Wholesale & retail | 2024 |
| Powtoon Limited | Information & communication | 2011 |
| PP Coding Limited | Information & communication | 2025 |
| PR Asset Management Limited | Professional & scientific | 1996 |
| Pr&A Ltd | Households | 2018 |
| Pra-Van Ltd | Real estate | 2018 |
| Prabhu-Shriram Ltd | Wholesale & retail | 2013 |
| Practice Marketing Consultants Limited | Other services | 2010 |
| Pradicorp UK Limited | Professional & scientific | 2014 |
| Pramukhji Ltd | Wholesale & retail | 2026 |
| Prana Investments Ltd | Real estate | 2026 |
| Pranam IT Limited | Information & communication | 2011 |
| Prasjb Ltd | Health & social care | 2022 |
| Pratik Accountancy Services Limited | Professional & scientific | 2014 |
| Pravaa Consulting Limited | Information & communication | 2020 |
| Pravara Life Limited | Information & communication | 2025 |
| Praxis Framework Ltd | Professional & scientific | 2013 |
| Precious Associates Ltd | Professional & scientific | 2022 |
| Precision Metrics Limited | Professional & scientific | 2025 |
| Prelly Ltd | Construction | 2023 |
| Prem Estate (Salford) Limited | Real estate | 2017 |
| Prem Estates (London) Limited | Real estate | 2016 |
| Prem Estates (Welling) Limited | Real estate | 2016 |
| Prem Estates Limited | Real estate | 2013 |
| Premier Apartments(London) Limited | Real estate | 2025 |
| Premier Horizons Ltd | Wholesale & retail | 2016 |
| Premier Interiors (Solutions) Limited | Construction | 2000 |
| Premier Marrakech Ltd | Administrative & support | 2022 |
| Premier Plumbing & Draining Ltd | Construction | 2026 |
| Premiere Ventures Limited | Wholesale & retail | 2020 |
| Premson Limited | Wholesale & retail | 1991 |
| Prentice Automotive Solutions Limited | Professional & scientific | 2021 |
| Present Materials Ltd | Manufacturing | 2023 |
| Prestige Art Limited | Wholesale & retail | 2023 |
| Prestige Plumbers Ltd | Construction | 2020 |
| Prestige UK Group Limited | Information & communication | 2017 |
| Prestor Properties Ltd | Real estate | 2021 |
| Prevista Ltd | Education | 1996 |
| PRH Solutions Limited | Professional & scientific | 2010 |
| Pri-Parsh Ltd | Information & communication | 2017 |
| Pribus Consultancy Limited | Professional & scientific | 2001 |
| Pribus Management Ltd | Other services | 2021 |
| Pricecutter (GB) Limited | Real estate | 2007 |