| Padelbreaks Limited | Administrative & support | 2026 |
| Page & Watts Limited | Construction | 1976 |
| Pagis (UK) Limited | Administrative & support | 2011 |
| Paines Conservatory Specialists Limited | Construction | 2002 |
| Painless Injection Ltd | Wholesale & retail | 2023 |
| PAJ Property Maintenance Limited | Administrative & support | 2012 |
| Pakistan Inspection Company UK Ltd. | Financial services | 2016 |
| Pallant Collins Estates Limited | Real estate | 2020 |
| Pallant Collins Holdings Limited | Arts & recreation | 2020 |
| Palmarium Consultancy Limited | Professional & scientific | 2023 |
| Palmarium Holdings Ltd | Financial services | 2023 |
| Palmside Ltd | Professional & scientific | 2021 |
| Pang Ploy Ltd | Hospitality | 2023 |
| Pangea Technology Ltd | Administrative & support | 2017 |
| Panos DIM Limited | Health & social care | 2011 |
| Panotrade LLP | | 2014 |
| Papier-Mettler UK Limited | Wholesale & retail | 2001 |
| Papillon Creation Limited | Construction | 2010 |
| PAR Excellence Mgmt Ltd | Arts & recreation | 2020 |
| Parachute Productions Ltd | Construction | 2023 |
| Paradigm Services Limited | Other services | 2002 |
| Paragon 28 UK, Ltd | Health & social care | 2022 |
| Paragon Lettings UK Ltd | Real estate | 2015 |
| Paragon Real Estate Developments Limited | Real estate | 2016 |
| Parameter Generation Europe Limited | Professional & scientific | 2010 |
| Paramount Cooling Ltd. | Manufacturing | 2022 |
| Parc Leisure Ltd | Hospitality | 2026 |
| Pardon Chambers Architects Limited | Professional & scientific | 2016 |
| Park Place (Aylesbury) Management Company Limited | Households | 2004 |
| Parkbreak Limited | Real estate | 1979 |
| Parker Land LLP | | 2007 |
| Parkfast Ltd | Information & communication | 2012 |
| Parklands RTM Company Limited | Households | 2017 |
| Parks of Essex Ltd | Administrative & support | 2023 |
| Parkway Apartments (Phase Two) Limited | Households | 1994 |
| Parkway Mews Residents Limited | Households | 2012 |
| Parlour Fourteen Limited | Other services | 2017 |
| Parrack Packaging Limited | Manufacturing | 2001 |
| Parren Limited | Wholesale & retail | 2025 |
| Parsons Green Estate Management Company Limited | Real estate | 1989 |
| Partmaster Ltd | Other services | 2024 |
| Partners in Support Limited | Administrative & support | 2007 |
| Partnership Heating and Plumbing Ltd. | Construction | 2019 |
| Party in Your Garden Limited | Other services | 2025 |
| Pascoe Creative Consultancy Limited | Other services | 2017 |
| Passpel Limited | Education | 2020 |
| Patch Drain Solutions Limited | Construction | 2022 |
| Paternoster Building Services Limited | Construction | 2024 |
| Paterson Precision Engineering Limited | Manufacturing | 2005 |
| PATH900 Limited | Other services | 2018 |
| Pathfinders-Chapter Community Interest Company | Health & social care | 2025 |
| Patient Thread Ltd | Health & social care | 2026 |
| Patlois Housing CIC | Health & social care | 2025 |
| Paul Frost Editing Ltd | Information & communication | 2015 |
| Paul Kendall Limited | Professional & scientific | 2019 |
| Paul Lavery Support Ltd | Administrative & support | 2016 |
| Paul Parnell Estates Limited | Transport & logistics | 2015 |
| Paul's Motor Workshop Limited | Wholesale & retail | 2017 |
| Pawar Management & Consultancy Services Limited | Professional & scientific | 2009 |
| Paxton & Hewlett Ltd | Wholesale & retail | 2024 |
| Payez Ltd | Information & communication | 2026 |
| Paynes Plastering Limited | Construction | 2022 |
| Payne’S Pressure Washing and Roof Care Ltd | Administrative & support | 2026 |
| PBK7 Artistry Limited | Information & communication | 2026 |
| PCG Consultancy Limited | Professional & scientific | 2016 |
| PCM Consultancy Limited | Professional & scientific | 2009 |
| PCS Driving Services Ltd | Transport & logistics | 2023 |
| Pdmj Properties Ltd | Real estate | 2023 |
| Pdnw Property Investments Ltd | Real estate | 2021 |
| Peacemaker Associates Limited | Professional & scientific | 2023 |
| Peachy Dons Limited | Real estate | 2021 |
| Peakdreams Limited | Other services | 2015 |
| Pear Tree Media Limited | Manufacturing | 2021 |
| Pearl Healthcare Limited | Health & social care | 2012 |
| Pearl of Comfort and Solace Initiative | Health & social care | 2026 |
| Pearson Property Services Limited | Real estate | 2016 |
| Peart North Limited | Professional & scientific | 2025 |
| Peartree Photo Limited | Professional & scientific | 2004 |
| Peas and Sweetcorn Limited | Information & communication | 2015 |
| PED Property Ltd | Real estate | 2023 |
| Pedley Farm Management Company Limited | Real estate | 2015 |
| Pendent World Limited | Professional & scientific | 2020 |
| Penrose Trading Limited | Administrative & support | 1994 |
| Peonies Property Management Ltd | Real estate | 2025 |
| People and Places for Memories Ltd | Real estate | 2014 |
| People Connect Limited | Extraterritorial | 2020 |
| People Partner Solutions Limited | Administrative & support | 2026 |
| PEP & Friends Ltd | Administrative & support | 2025 |
| Pepper Care (Reading) Ltd | Health & social care | 2012 |
| Pepperonnimarket Ltd | Wholesale & retail | 2026 |
| Perennial Ltd | Administrative & support | 2021 |
| Perennius Ltd. | Wholesale & retail | 2014 |
| Perfect AIM Archery Limited | Education | 2024 |
| Perfect Artificial Lawns Limited | Administrative & support | 2014 |
| Perfect Smart Repair Ltd | Other services | 2016 |
| Perfect STV Ltd | Hospitality | 2021 |
| Perfectionia Limited | Health & social care | 2026 |
| Performance 365 Ltd | Wholesale & retail | 2012 |
| Performance MAX Ltd | Professional & scientific | 2023 |
| Perkins Carpentry Limited | Construction | 2024 |