| PJ Plumbing Heating & Electrical Ltd | Construction | 2014 |
| PJ Search & Selection Limited | Wholesale & retail | 2000 |
| PJ Spray Limited | Professional & scientific | 2025 |
| PJA Signs Limited | Manufacturing | 2017 |
| PJB Estates Limited | Real estate | 2024 |
| PJC Property Investments Ltd | Real estate | 2016 |
| PJN Training Solutions Ltd | Education | 2009 |
| Pjpropertiesss Ltd | Real estate | 2026 |
| PJS Cleaning Services Limited | Administrative & support | 2021 |
| PJS Decorators Ltd | Construction | 2020 |
| PK Capital Incorporated Ltd | Real estate | 2017 |
| PK Kumar Medical Ltd | Health & social care | 2013 |
| PKM Electrical Ltd | Construction | 2019 |
| Pkmh Helper Ltd | Health & social care | 2022 |
| PKS Design Limited | Other services | 2005 |
| PKS Property Services Ltd | Construction | 2023 |
| PL Fire Security Ltd | Public administration | 2024 |
| PL Healthcare Limited | Health & social care | 2022 |
| PL Lift Solution Ltd | Administrative & support | 2017 |
| PL Robinson Design Limited | Professional & scientific | 2015 |
| PLA Business Services Ltd | Professional & scientific | 2017 |
| Placedirect Property Management Limited | Households | 1991 |
| Plain English Finance Ltd. | Information & communication | 2011 |
| Plamaglen Limited | | 1975 |
| Plan a Dynamic Consulting Ltd | Professional & scientific | 2019 |
| Plan B Capital Limited | Hospitality | 2021 |
| Plan Structures Limited | Professional & scientific | 2014 |
| Plan to Scan Ltd | Administrative & support | 2019 |
| Planet Energy Company Limited | Professional & scientific | 2023 |
| Planet Kids Community Interest Company | Arts & recreation | 2009 |
| Planet Padel Sports Ltd | Wholesale & retail | 2023 |
| Planit Plumbing Limited | Construction | 2025 |
| Planit Preservation Limited | Construction | 2000 |
| Plankbridge (Holdings) Ltd | Real estate | 2021 |
| Planning Solutions Limited | Arts & recreation | 1995 |
| Plants for Design Ltd | Wholesale & retail | 2021 |
| Plants Outside Ltd | Wholesale & retail | 2018 |
| Plata Finance Limited | Financial services | 2004 |
| Platform Blues Revival Ltd | Hospitality | 2023 |
| Platform UNO Limited | Hospitality | 2022 |
| PLATFORM99 Ltd | Information & communication | 2026 |
| Platinum Construction Services Ltd | Construction | 2018 |
| Platinum Finishes Limited | Construction | 2003 |
| Platinum Plumbing & Heating Engineers Limited | Construction | 2007 |
| Platinum Roofs & Building Limited | Construction | 2025 |
| Platinum Vision Limited | Health & social care | 2009 |
| Platinum Windows & Conservatories Limited | Construction | 2011 |
| Play Box Limited | Information & communication | 2018 |
| Play Harbor Ltd | Wholesale & retail | 2026 |
| Play Tech AI Holdings Limited | Financial services | 2026 |
| Play Tech AI Ltd | Manufacturing | 2025 |
| Player 3 Sports Ltd | Professional & scientific | 2025 |
| Playhouse Rupert ST (London) Limited | Hospitality | 2021 |
| Playing the Field Ltd | Hospitality | 2025 |
| Playingcardsai Ltd | Manufacturing | 2026 |
| Playspirations Limited | Wholesale & retail | 2020 |
| Playvox UK Limited | Wholesale & retail | 2021 |
| Playworld (New Forest) C.I.C. | Health & social care | 2011 |
| Playzone 24 Ltd | Wholesale & retail | 2026 |
| Plbrc Properties Ltd | Real estate | 2020 |
| Pleasure Serve Limited | Hospitality | 1994 |
| Plemont Bay Ltd | Financial services | 2023 |
| Plested Bakehouse Ltd | Wholesale & retail | 2022 |
| Plested Pies Limited | Hospitality | 2021 |
| PLH Apartments Limited | Real estate | 2025 |
| Plimat (UK) Limited | Wholesale & retail | 1995 |
| PLM Homes Limited | Construction | 2003 |
| PLM Technical Services Ltd | Construction | 2005 |
| Plucart Limited | Financial services | 2024 |
| Plug Recruitment Ltd | Administrative & support | 2026 |
| PLUG4SCOOTS Limited | Wholesale & retail | 2022 |
| Plum Interior Designers Limited | Professional & scientific | 2004 |
| Plus Chauffeurs Limited | Administrative & support | 2014 |
| Plus Film Ltd. | Information & communication | 2002 |
| Plus Heritage Ltd | Manufacturing | 2020 |
| Plus HR Limited | Professional & scientific | 2006 |
| Plus YOU Limited | Other services | 2007 |
| PLUS3 Training Ltd | Other services | 2017 |
| Pluscacao Ltd | Wholesale & retail | 2019 |
| Plutus Romsey Limited | Hospitality | 2025 |
| Plyo-Tec Limited | Wholesale & retail | 2018 |
| PM & S Boss Properties Ltd | Real estate | 2016 |
| PM Hospitality Consultancy Ltd | Professional & scientific | 2022 |
| PM Poli Services Ltd | Construction | 2016 |
| PM Properties Southern Limited | Real estate | 2016 |
| PMA Recruitment Limited | Administrative & support | 1990 |
| PMA Security Ltd | Extraterritorial | 2024 |
| PMB 37 Ltd | Construction | 2015 |
| PMB Maintenance Limited | Hospitality | 2025 |
| PMF Holdings Ltd | Real estate | 2016 |
| PMF Projects Limited | Construction | 2013 |
| Pmfp Limited | Wholesale & retail | 2010 |
| PMG Property Developments Ltd | Real estate | 2017 |
| PML Haulage Limited | Transport & logistics | 2017 |
| PML Trading Ltd | Wholesale & retail | 2025 |
| Pmp(Uk)Service Group Limited | Professional & scientific | 2019 |
| Pmp(Uk)Services Limited | Professional & scientific | 2010 |
| PMW Carpentry & Building Services Ltd | Construction | 2015 |
| PMX Coatings (UK) Limited | Administrative & support | 2013 |
| PN RAJ Ltd | Transport & logistics | 2021 |