| Prep PM Limited | Information & communication | 2024 |
| Prescotts (Denham) Limited | Households | 1985 |
| Presidium Cars Limited | Transport & logistics | 2011 |
| Presteigne Homes Limited | Construction | 2025 |
| Prestige Building Services (London) Ltd | Construction | 2016 |
| Prestige Buildings Solutions Ltd | Construction | 2025 |
| Prestige Cuts 100 Ltd | Other services | 2021 |
| Prestige Property Investments (London) Ltd | Real estate | 2022 |
| Prestige Staffing and Training Group Ltd | Administrative & support | 2025 |
| PRESTIGE51 Ltd | Transport & logistics | 2023 |
| Prestwood Residential Homes Ltd | Health & social care | 2000 |
| Prestyle Limited | Professional & scientific | 2024 |
| Pretty Shop Ltd | Wholesale & retail | 2021 |
| Prettysac Ltd | Manufacturing | 2018 |
| Preziosa Cruise Limited | Transport & logistics | 2016 |
| Prickly Pear Holding Ltd | Financial services | 2023 |
| Pride Property Construction Ltd | Construction | 2017 |
| Pride Works Limited | Wholesale & retail | 2006 |
| Pridewood Homes Limited | Wholesale & retail | 2002 |
| Prima Classe Transfers Ltd | Transport & logistics | 2026 |
| Primacy Homecare Ltd | Health & social care | 2023 |
| Primax Global Ltd | Wholesale & retail | 2019 |
| Prime CUT Services Ltd | Wholesale & retail | 2022 |
| Prime Lighting Solutions Ltd | Professional & scientific | 2014 |
| Prime Motion Events Ltd | Administrative & support | 2025 |
| Prime Nest Group Ltd | Real estate | 2024 |
| Prime Services & Products Ltd | Wholesale & retail | 2023 |
| Prime Yard Storage Ltd | Real estate | 2026 |
| Primefabric Supplies Ltd | Wholesale & retail | 2026 |
| Primenest Investment Properties Limited | Real estate | 2025 |
| Primo Elite Ltd | Wholesale & retail | 2023 |
| Primomka Limited | Real estate | 2005 |
| Primrose Catering Limited | Hospitality | 2000 |
| Primrose Ealing Ltd | Wholesale & retail | 2025 |
| Primrose Food Ventures Ltd. | Financial services | 2018 |
| Primum Limited | Education | 2018 |
| Princes Mansions Management Company Limited | Households | 1996 |
| Principio Consultancy Ltd | Information & communication | 2021 |
| Print Concept Limited | Wholesale & retail | 1999 |
| Print Station London Limited | Manufacturing | 2017 |
| Priority Back Office Systems Ltd | Information & communication | 2019 |
| Priory Court (High Wycombe) Limited | Real estate | 1992 |
| Prishansh Limited | Wholesale & retail | 2018 |
| Private Parking Solutions Property Investment Ltd | Real estate | 2024 |
| Privategrowth LP | | 2021 |
| Priya Holdings Ltd | Real estate | 2019 |
| PRM Motors Ltd | Wholesale & retail | 2022 |
| Pro Asbestos Solutions Ltd | Construction | 2023 |
| Pro Civils Ltd | Construction | 2020 |
| Pro Clean Group Ltd | Administrative & support | 2015 |
| Pro Game (UK) Limited | Administrative & support | 2011 |
| Pro London Construction Ltd | Construction | 2023 |
| Pro TEC Steels Ltd | Manufacturing | 2015 |
| Pro Tour Vans Ltd | Administrative & support | 2022 |
| Pro TRU Ltd | Extraterritorial | 2026 |
| Pro Visio Services Ltd | Other services | 2024 |
| Pro-Squad Builders Ltd | Construction | 2022 |
| Proberg Ltd | Construction | 2018 |
| Probrook Limited | Real estate | 2019 |
| Procurement Works (Nationwide) Limited | Wholesale & retail | 2015 |
| Prodrive Personnel Limited | Administrative & support | 2007 |
| Prodynamic Construction Limited | Construction | 2024 |
| Profast Developments Ltd | Real estate | 2024 |
| Profastbuild Ltd | Construction | 2016 |
| Professional Building Enterprise Ltd | Construction | 2013 |
| Professional Catering Ltd | Hospitality | 2019 |
| Professional Smiles Ltd | Health & social care | 2026 |
| Professionfocus Training Center Limited | Education | 2011 |
| Profix House Ltd | Construction | 2022 |
| Profixheatmasters Plumbers & Electricians Ltd | Construction | 2025 |
| Progrove Limited | Financial services | 2021 |
| Project 7 Management Ltd. | Information & communication | 2015 |
| Project Cube Bidco Limited | Professional & scientific | 2018 |
| Project Cube Topco Limited | Financial services | 2018 |
| Project Management Executives Ltd | Information & communication | 2009 |
| Project People Holdco Limited | Financial services | 2025 |
| Project People Service Co Limited | Administrative & support | 2025 |
| PROJECT7 Logistics Limited | Construction | 2017 |
| Prolodge Ltd | Real estate | 2025 |
| Prologics Solutions UK Ltd | Information & communication | 2021 |
| Proma Beta Limited | Real estate | 2021 |
| Proma Charlie Ltd | Real estate | 2024 |
| Proma Delta Limited | Construction | 2026 |
| Proma Holding Limited | Professional & scientific | 2017 |
| Proma Management Ltd. | Professional & scientific | 2020 |
| Promos World Limited | Wholesale & retail | 2015 |
| Pronto Construction Limited | Construction | 2010 |
| Propaction Limited | Information & communication | 2019 |
| Properties Enterprise Limited | Real estate | 2019 |
| Properties Management England Ltd | Real estate | 2021 |
| Properties Management Services Limited | Real estate | 2019 |
| Properties R&A Limited | Real estate | 2025 |
| PROPERTIES4GOOD Ltd | Real estate | 2023 |
| Propertify Ltd | Information & communication | 2019 |
| Property Guruji Ltd | Real estate | 2024 |
| Property Horizons Group Limited | Real estate | 2008 |
| Property Investments Dumfries Limited | Real estate | 2025 |
| Propety Service Ltd | Construction | 2019 |
| Propiedades Investments Limited | Professional & scientific | 2013 |
| Prospeqt Ltd | Construction | 2020 |