| Productive Industries Ltd | Professional & scientific | 2017 |
| Productos DE Iberia Limited | Wholesale & retail | 2003 |
| Professional Bodycare Limited | Other services | 2011 |
| Professional Paper Supplies Limited | Wholesale & retail | 1999 |
| Professional Safety Services (UK) Ltd | Manufacturing | 2007 |
| Professional Safety Services (Utilities) Ltd | Manufacturing | 2025 |
| Profile Engineering (UK) Limited | Manufacturing | 2006 |
| Profile Learning Solutions Limited | Information & communication | 2010 |
| Profile Learning Technologies Ltd | Information & communication | 2022 |
| Profix Electrical Ltd | Construction | 2026 |
| Profix Property Group Ltd | Construction | 2026 |
| Profix Trades Limited | Construction | 2024 |
| Profunda Ltd | Extraterritorial | 2015 |
| Progress Factors UK Ltd | Information & communication | 2012 |
| Progressive Independent Visitors Limited | Public administration | 2022 |
| Progressive Initiative Foundation | Administrative & support | 2013 |
| Progressive Project Controls Limited | Transport & logistics | 2018 |
| Proheating Ltd | Construction | 2020 |
| Project 4 Home Developments Ltd | Construction | 2019 |
| Project Access Ltd | Construction | 2025 |
| Project Body Limited | Other services | 2011 |
| Project Cladding & Decking Services Ltd | Construction | 2009 |
| Project Dexterity Ltd | Professional & scientific | 2011 |
| Project Jorvik Bidco Limited | Extraterritorial | 2022 |
| Project Jorvik Midco Limited | Extraterritorial | 2022 |
| Project Jorvik Topco Limited | Extraterritorial | 2022 |
| Project Padel Community Limited | Arts & recreation | 2026 |
| Project Peach Limited | Information & communication | 2016 |
| Project Public Ltd | Professional & scientific | 2024 |
| Project Sophia Ltd | Financial services | 2012 |
| Projecting People Limited | Administrative & support | 2010 |
| Projecting People Services Limited | Administrative & support | 2015 |
| Projex Quantity Surveying Ltd | Professional & scientific | 2022 |
| Prokool Ltd | Manufacturing | 2016 |
| Proma KIT Ltd | Wholesale & retail | 2017 |
| Promedtech Consulting Limited | Professional & scientific | 2023 |
| Propane Tank Services Limited | Construction | 2003 |
| Propelo Limited | Administrative & support | 2016 |
| Proper BET Limited | Arts & recreation | 2025 |
| Proper Brew Ltd | Hospitality | 2020 |
| Proper Financial Planning Ltd | Extraterritorial | 2023 |
| Proper Good Digital Ltd | Professional & scientific | 2025 |
| Proper Group Holdings Limited | Financial services | 2025 |
| Proper Mint Properties Limited | Real estate | 2021 |
| Proper-Good Ltd | Professional & scientific | 2025 |
| Properties 2 Management Limited | Construction | 2017 |
| Properties by MJ & LJ Limited | Real estate | 2025 |
| Properties by Noble LLP | | 2024 |
| Properties by Sally Anne Limited | Real estate | 2023 |
| Properties North and South Ltd | Real estate | 2024 |
| Property Investment Partners Limited | Extraterritorial | 2008 |
| Property Management (York) Limited | Real estate | 2005 |
| Property Partners Worldwide Limited | Extraterritorial | 2008 |
| Property Peeps Limited | Real estate | 2017 |
| Property Portfolio Partners UK Ltd | Real estate | 2020 |
| Property Surveys Devon Limited | Professional & scientific | 2013 |
| Property Valet Services Ltd | Administrative & support | 2023 |
| Propham Properties Ltd | Real estate | 2013 |
| Prophaseperformance Ltd | Arts & recreation | 2026 |
| Proprius Developments Limited | Construction | 2023 |
| Propulsion Development's Ltd | Real estate | 2024 |
| Propulsion Racing Ltd | Arts & recreation | 2024 |
| Propulsion Transport Ltd | Transport & logistics | 2025 |
| Prospect House Residential Care Limited | Health & social care | 2016 |
| Prospect TV Ltd | Information & communication | 2019 |
| Prospeed Motorsport Limited | Manufacturing | 2002 |
| Prosperity Homes Ltd | Real estate | 2020 |
| Prosperity Mindfulness Limited | Other services | 2015 |
| Prosperity Property North Ltd | Information & communication | 2019 |
| Protec Roofing & Gutters Ltd | Construction | 2025 |
| Proteus Consultancy Group Ltd | Information & communication | 2024 |
| Protian Limited | Information & communication | 2009 |
| Protothought Ltd | Professional & scientific | 2020 |
| Proud AS Punch Limited | Hospitality | 2023 |
| Providence Confidence Management CIC | Education | 2023 |
| Prowting Homes Anglia Limited | Extraterritorial | 1990 |
| Prowting Homes Central Limited | Extraterritorial | 1955 |
| Prowting Homes Chatsworth Limited | Professional & scientific | 2001 |
| Prowting Homes Limited | Extraterritorial | 1971 |
| Prowting Homes Ludlow Limited | Extraterritorial | 2000 |
| Prowting Homes Midlands Limited | Extraterritorial | 1988 |
| Prowting Homes South East Limited | Professional & scientific | 1959 |
| Prowting Homes South West Limited | Extraterritorial | 1972 |
| Prowting Homes West Limited | Extraterritorial | 1961 |
| Prowting Homes Wolds Limited | Extraterritorial | 1961 |
| Prowting Limited | Financial services | 1987 |
| Prowting Projects Limited | Extraterritorial | 1963 |
| Prowting Properties Limited | Professional & scientific | 1966 |
| Proyx Ltd | Manufacturing | 2020 |
| Prudent Clinic Limited | Health & social care | 2016 |
| Pryda Recruitment Ltd | Administrative & support | 2023 |
| Prydason Limited | Financial services | 2008 |
| Pryers Solicitors LLP | | 2008 |
| PS Excavations Limited | Information & communication | 2014 |
| PS Management York Limited | Wholesale & retail | 2025 |
| PSB Health & Social Care Consultancy Services Limited | Education | 2019 |
| PSE Laser Ltd | Manufacturing | 2020 |
| Psfd Limited | Extraterritorial | 2009 |
| Psicon Limited | Health & social care | 1998 |
| PSY Associates Limited | Health & social care | 2026 |