| Portchester Contracts Limited | Households | 2012 |
| Portecloud Limited | Information & communication | 2024 |
| Portergate Property Management Limited | Administrative & support | 2013 |
| Portfolio Private Clients Ltd | Hospitality | 2019 |
| Portland Technology Ltd | Information & communication | 2025 |
| Ports of Knightsbridge Limited | Wholesale & retail | 2009 |
| Posh Geli Ltd | Wholesale & retail | 2021 |
| Posh Rooms Limited | Real estate | 2006 |
| Poshawo Limited | Public administration | 2025 |
| Posifi Ltd | Wholesale & retail | 2024 |
| Positive Communications Integrating Deaf People Limited | Professional & scientific | 2002 |
| Positive Groove Ltd | Information & communication | 2013 |
| Positive Mindset Consulting Limited | Administrative & support | 2016 |
| Positive World Online Ltd | Information & communication | 2021 |
| Positive World Shop Ltd | Wholesale & retail | 2021 |
| Positivity With JAY Ltd | Arts & recreation | 2022 |
| Post House Lofts Limited | Construction | 2018 |
| Postech Fashion UK Ltd | Wholesale & retail | 2022 |
| Postscript Pictures Limited | Information & communication | 2021 |
| Potential Education Limited | Education | 2022 |
| Potnuru Limited | Information & communication | 2013 |
| Potnuru Properties Limited | Real estate | 2024 |
| Poultron Ltd | Information & communication | 2026 |
| Pound Bridge Limited | Professional & scientific | 2022 |
| Pound Hive Ltd | Wholesale & retail | 2025 |
| Poundsystem Limited | Professional & scientific | 2003 |
| Poured Perfectly Ltd | Hospitality | 2025 |
| POW Health Care and Education Ltd | Health & social care | 2018 |
| Powar Consulting Limited | Professional & scientific | 2007 |
| Powderfryer Ltd | Other services | 2024 |
| Power 40 Consulting Ltd | Administrative & support | 2023 |
| Power BI Creative Ltd | Information & communication | 2019 |
| Power Data Associates Ltd | Information & communication | 2003 |
| Power Electronics Corp UK Ltd | Wholesale & retail | 2012 |
| Power Integration Engineering Limited | Professional & scientific | 2014 |
| Power Platform Technology Limited | Information & communication | 2020 |
| Power Systems International Limited | Manufacturing | 1988 |
| Power Tool Solutions Limited | Manufacturing | 1998 |
| Power Tronix Limited | Information & communication | 2020 |
| POWER2TEK Ltd | Wholesale & retail | 2014 |
| Powerfiller Ltd | Other services | 2023 |
| Powerful Living Limited | Professional & scientific | 2025 |
| Powerful Possibilities Ltd | Other services | 2017 |
| Powerhouse Services Limited | Wholesale & retail | 2002 |
| Powerlink Networks Ltd | Construction | 2026 |
| Powermed Plus Limited | Wholesale & retail | 2009 |
| Powernat Organics International Development Consulting Ltd | Manufacturing | 2023 |
| Powernetics Technologies Limited | Manufacturing | 2014 |
| Powersalt Limited | Manufacturing | 2010 |
| Powerscreen International Limited | Financial services | 1970 |
| Powerscrub Ltd | Other services | 2024 |
| Powershield Europe Limited | Information & communication | 2013 |
| Powersoft Ltd | Professional & scientific | 2021 |
| Powersterone Limited | Manufacturing | 2025 |
| Powis Sinatra Limited | Households | 2017 |
| PP Delivery Limited | Administrative & support | 2020 |
| PP Food Ltd | Hospitality | 2024 |
| PP Noodle Ltd | Hospitality | 2024 |
| PPA Consultancy Holdings Ltd | Financial services | 2020 |
| PPN Construction Ltd | Construction | 2015 |
| PPO Hospitality Ltd | Hospitality | 2026 |
| PPP Camden BSF Limited | Construction | 2010 |
| PPP Somerset BSF Limited | Construction | 2010 |
| Ppsgb Limited | Professional & scientific | 2018 |
| PR Trade and Transport Services Ltd | Transport & logistics | 2025 |
| PR2 Holdings Limited | Financial services | 2004 |
| PR2 Solutions Limited | Information & communication | 2004 |
| Pracmac Limited | Information & communication | 2024 |
| Practical Patient Safety Solutions Limited | Professional & scientific | 2017 |
| Practical Skills Limited | Education | 2018 |
| Pracvor Limited | Professional & scientific | 2013 |
| Pradha Infotech Ltd | Information & communication | 2019 |
| Prado Property Management Ltd | Real estate | 2018 |
| Praedium Property Limited | Extraterritorial | 2006 |
| Praesto Limited | Professional & scientific | 2002 |
| Pragmatic Health Ltd | Other services | 2020 |
| Pragmatic Tech Limited | Information & communication | 2022 |
| Praima Limited | Information & communication | 2016 |
| Praise Palace Business School CIC | Education | 2026 |
| Prakal Consultancy Services Limited | Information & communication | 2019 |
| Prama UK Limited | Wholesale & retail | 2026 |
| Pramod Networks Ltd | Information & communication | 2010 |
| Prana Design and Build Ltd | Construction | 2025 |
| Pranav IT Solutions Ltd | Information & communication | 2015 |
| Pranixbio Ltd | Information & communication | 2026 |
| Pranu Properties Ltd | Real estate | 2025 |
| Prartech Investments Ltd | Real estate | 2023 |
| Prartech Ltd | Information & communication | 2012 |
| Prasad Guduri Limited | Manufacturing | 2022 |
| Pratelli Property Limited | Real estate | 2026 |
| Prattys Ltd | Hospitality | 2020 |
| Pravasa Events Ltd | Administrative & support | 2024 |
| PRC Architecture and Planning Limited | Professional & scientific | 1993 |
| PRC Architecture Ltd | Professional & scientific | 2020 |
| Pre-Con Solutions Ltd | Professional & scientific | 2022 |
| Precedent Retail Group Ltd | Wholesale & retail | 2019 |
| Precious Gift Childcare Services Ltd | Health & social care | 2022 |
| Preciousheart Global Services Ltd | Health & social care | 2020 |
| Precise Components Limited | Manufacturing | 1996 |
| Precise Homes Ltd | Real estate | 2021 |