| Porter Technology Limited | Information & communication | 2024 |
| Porter Trading Limited | Wholesale & retail | 1988 |
| Porter Valley Living Limited | Wholesale & retail | 2020 |
| Porter Valley Technology Company Limited | Information & communication | 2026 |
| Porterbrook House Limited | Real estate | 2016 |
| Porterdale Ltd | Professional & scientific | 2015 |
| Porters Cleaning Ltd | Administrative & support | 2021 |
| Portfast Ltd | Information & communication | 2007 |
| Portfire Pyrotechnics Limited | Professional & scientific | 2015 |
| Portier Coaching & Workshops Ltd | Health & social care | 2022 |
| Portland Care 1 Limited | Health & social care | 2022 |
| Portland Care 2 Limited | Health & social care | 2022 |
| Portland Care 3 Limited | Health & social care | 2022 |
| Portland Care 4 Limited | Health & social care | 2022 |
| Portland Care 5 Limited | Health & social care | 2022 |
| Portland Care 6 Limited | Health & social care | 2022 |
| Portland Care 7 Limited | Health & social care | 2023 |
| Portland Care Group Limited | Health & social care | 2022 |
| Portland Clinical Holdings Limited | Financial services | 2023 |
| Portland Clinical Limited | Administrative & support | 2014 |
| Portland Community Limited | Health & social care | 2026 |
| Portland Electrical Limited | Wholesale & retail | 1997 |
| Portland Investment Group Holdings Limited | Financial services | 2023 |
| Portland Investment Group Limited | Administrative & support | 2002 |
| Portland Investment Properties Limited | Real estate | 2006 |
| Portland Payroll Limited | Real estate | 2017 |
| Portman Health and Protection Limited | Other services | 2012 |
| Portobello RMF Engineering Ltd | Manufacturing | 2000 |
| Portobello RMF Holdings Limited | Professional & scientific | 2014 |
| Portobello RMF Trustees Limited | Professional & scientific | 2019 |
| Portway Forgings (Wednesbury) Limited | | 1948 |
| Poseidon Fish Bar Ltd | Hospitality | 2018 |
| Positech International Private Limited | Administrative & support | 2016 |
| Positive Steps Rotherham Ltd | Health & social care | 2025 |
| Positive Transition Limited | Other services | 2019 |
| Positively Online Ltd | Information & communication | 2004 |
| Posl Limited | Administrative & support | 2005 |
| Postal & News Ltd | Wholesale & retail | 2012 |
| Potasio UK LLP | | 2024 |
| Potassium UK LLP | | 2024 |
| Potential Project UK Limited | Administrative & support | 2015 |
| Potion Pilates Limited | Arts & recreation | 2025 |
| Pots by Prince Limited | Manufacturing | 2024 |
| Pots to Paint Limited | Professional & scientific | 2025 |
| Potter's Leisure Ltd. | Arts & recreation | 1948 |
| Potteries Property Limited | Real estate | 2016 |
| Potterly Ltd | Information & communication | 2019 |
| Potters Abroad Limited | Administrative & support | 2010 |
| Potters Friends Foundation CIC | Professional & scientific | 2014 |
| Potters Green Health Care Limited | Health & social care | 2022 |
| Potters Resorts Limited | Hospitality | 2021 |
| Pottery Mews Management Company Limited | Real estate | 2018 |
| Pottery West Limited | Manufacturing | 2015 |
| Potts Financial Planning Ltd | Financial services | 2012 |
| Poulsom Middlehurst Ltd | Information & communication | 2010 |
| Poultry Trade Partners UK Ltd | Wholesale & retail | 2017 |
| Pound Bargain Walkley Limited | Wholesale & retail | 2024 |
| Pound Bazar Ltd | Wholesale & retail | 2015 |
| Pound for Pound Hull Ltd | Wholesale & retail | 2019 |
| Pound Home Discount Store Ltd | Wholesale & retail | 2022 |
| Pound Shop Express Limited | Wholesale & retail | 2007 |
| Pound Value UK Ltd | Wholesale & retail | 2019 |
| Pour Galactic Ltd | Hospitality | 2018 |
| POW (UK) Limited | Manufacturing | 2012 |
| Powar&Sons Ltd | Hospitality | 2024 |
| Powatechnic Limited | Wholesale & retail | 2001 |
| Powder Blue Holidays Ltd | Hospitality | 2008 |
| Powdercoatinguk Limited | Construction | 2019 |
| Power 2 Empire Limited | Transport & logistics | 2014 |
| Power Control and Automation Solutions Limited | Manufacturing | 2017 |
| Power Insight Solutions Ltd | Information & communication | 2023 |
| Power Q for Integrated Solutions Ltd | Wholesale & retail | 2023 |
| Power to Account Limited | Administrative & support | 2026 |
| Powerboatsrus Ltd | Wholesale & retail | 2009 |
| Powerfirm Limited | Wholesale & retail | 1990 |
| Powergauge Limited | Information & communication | 1993 |
| Powergen Solutions Ltd | Professional & scientific | 2020 |
| Powerhouse OFF Grid Limited | Construction | 2025 |
| Powerimp Electronics Ltd. | Wholesale & retail | 2023 |
| Powerline Electrical Contractors Ltd | Construction | 2020 |
| Powerminster Engineering Limited | | 1977 |
| Powerstar Solutions Limited | Manufacturing | 2021 |
| Powertan Studios Limited | Other services | 2012 |
| Powertherm Contract Services Ltd. | Construction | 1989 |
| Powertherm Holdings Limited | Construction | 2025 |
| Powertherm Site Services Ltd | Administrative & support | 2022 |
| Poxon Sports Limited | Arts & recreation | 2016 |
| PP Motor Homes Ltd | Wholesale & retail | 2020 |
| PP Supplies (UK) Limited | Wholesale & retail | 2025 |
| PPC Healthcare Ltd | Health & social care | 2015 |
| PPC Housing Services Ltd | Construction | 2023 |
| PPC Management Ltd | Professional & scientific | 2025 |
| PPD Holdings Limited | Financial services | 2016 |
| PPE Organisation Ltd | Wholesale & retail | 2020 |
| PPG Events Limited | Arts & recreation | 2017 |
| PPM (Nationwide) Limited | Construction | 2010 |
| PPM Building Services Ltd | Construction | 2021 |
| PPS Demolition Ltd | Water & waste | 2023 |
| PPS Metal Recycling Ltd | Water & waste | 2012 |
| Ppsd Property Limited | Real estate | 2023 |