| Priveli Ltd | Health & social care | 2021 |
| Priviglaze Ltd | Manufacturing | 2023 |
| Privilege Care Limited | Health & social care | 2013 |
| Privy-Ttt Care Services Ltd | Health & social care | 2018 |
| Privé Trading Ltd | Wholesale & retail | 2025 |
| Prized Properties Ltd | Real estate | 2019 |
| Prlss Ltd | Wholesale & retail | 2025 |
| Pro & Family Ltd | Other services | 2021 |
| Pro Architectural Ltd | Construction | 2015 |
| Pro Beauty Salon Limited | Other services | 2015 |
| Pro Burger Ltd | Hospitality | 2025 |
| Pro City Services Ltd | Administrative & support | 2021 |
| Pro Fire Solutions Ltd | Construction | 2021 |
| Pro Glazing Group Ltd | Construction | 2014 |
| Pro Home Group Ltd | Construction | 2015 |
| Pro Level Scaffolding Ltd | Construction | 2024 |
| Pro Metal Construction Ltd | Construction | 2022 |
| Pro Pest Control Limited | Other services | 2008 |
| Pro Pizza Ltd | Hospitality | 2021 |
| Pro Plastics Limited | Construction | 2015 |
| Pro Union Ltd | Construction | 2018 |
| Pro-Locks Ltd | Manufacturing | 2022 |
| Pro-Physiocare Limited | Health & social care | 2024 |
| Pro-Techs Solutions Ltd | Wholesale & retail | 2023 |
| Proactive Cleaners Ltd | Administrative & support | 2017 |
| Proactive Construction Management Ltd | Construction | 2022 |
| Proactive E&M Cleaning Ltd | Construction | 2024 |
| Proactive Engineering Recruitment Ltd | Administrative & support | 2019 |
| Proactive Extreme Cleaning Ltd | Administrative & support | 2022 |
| Proactive Facilities Management Ltd | Administrative & support | 2022 |
| Proactive Group Services Ltd | Administrative & support | 2022 |
| Proactive Homecare Ltd | Health & social care | 2022 |
| Proactive Removals Ltd | Administrative & support | 2022 |
| Proactive Security Management LLP | | 2022 |
| Proassist Services Limited | Administrative & support | 2024 |
| Probuild (Hayes) Limited | Construction | 2007 |
| Probuilders Private Ltd | Professional & scientific | 2015 |
| Procadence Technologies Limited | Information & communication | 2010 |
| Procolour Building Limited | Transport & logistics | 2004 |
| Procter Motor Rentals Ltd | Wholesale & retail | 2015 |
| Procter Motor Repairs Limited | Wholesale & retail | 2010 |
| Proctor Software UK Ltd | Information & communication | 2024 |
| Procurementsos Limited | Professional & scientific | 2016 |
| Prodigy Dance Studios Ltd | Education | 2025 |
| Prodjex Ltd | Construction | 2009 |
| Prodrv Limited | Transport & logistics | 2023 |
| Prodrvn Limited | Transport & logistics | 2024 |
| Professional Development Foundation | Professional & scientific | 1987 |
| Professional Growth Partner Ltd | Information & communication | 2025 |
| Professional Immigration & Consulting Services Limited | Professional & scientific | 2008 |
| Professional Medical Consultancy Limited | Health & social care | 2022 |
| Professional Medical Management Ltd | Manufacturing | 2018 |
| Professional Motors Group Ltd | Wholesale & retail | 2024 |
| Professional Motors Limited | Wholesale & retail | 2021 |
| Professional Motors Slough Ltd | Wholesale & retail | 2024 |
| Professional Soft Limited | Information & communication | 2011 |
| Profile Display Limited | Wholesale & retail | 2012 |
| Profirst Property Services Ltd | Construction | 2025 |
| Profix Experts Limited | Construction | 2017 |
| Proflex Limited | Transport & logistics | 2003 |
| Profusion Developments Ltd | Real estate | 2025 |
| Profusion Exhausts Ltd | Wholesale & retail | 2012 |
| Profusion Investments Ltd | Real estate | 2023 |
| Progress Business Centre Limited | Real estate | 1987 |
| Progressive Housing Solutions Ltd | Hospitality | 2019 |
| Progressive Ventures Ltd | Real estate | 2024 |
| Prohire Solutions Ltd | Administrative & support | 2026 |
| Prohire Tools Limited | Administrative & support | 2022 |
| Project Cantona Limited | Hospitality | 2025 |
| Project GPS Limited | Professional & scientific | 2010 |
| Project Heights Consulting Ltd | Professional & scientific | 2018 |
| Project Resourcing Solutions Limited | Professional & scientific | 2007 |
| Project Sugar Limited | Professional & scientific | 1890 |
| Promatrix Solutions PVT Ltd | Information & communication | 2012 |
| Promocube UK Limited | Administrative & support | 2019 |
| Proneon Ltd | Wholesale & retail | 2015 |
| Pronexxions Ltd | Professional & scientific | 2020 |
| Pronopoly Ltd | Real estate | 2025 |
| Pronoth Investments Limited | Health & social care | 2014 |
| Pronto Deli Bite Ltd | Hospitality | 2024 |
| Properkey Management Ltd | Real estate | 2019 |
| Properties by JSD Limited | Education | 2014 |
| Properties Infinite Ltd | Real estate | 2024 |
| Properties Opsdev Limited | Real estate | 2022 |
| Property 00001 Limited | Real estate | 2023 |
| Property by TE Ltd | Real estate | 2025 |
| Property Cycle Ltd | Administrative & support | 2021 |
| Property EA Ltd | Real estate | 2024 |
| Property Hill Limited | Real estate | 2005 |
| Property Lighthouse Ltd | Real estate | 2019 |
| Property M&M Ltd | Real estate | 2021 |
| Property Management & Maintenance Ltd | Real estate | 2020 |
| Property Mantra Limited | Hospitality | 2018 |
| Property Owls Ltd | Households | 2020 |
| Property Peaks Limited | Real estate | 2022 |
| Property Sourcing Services Limited | Real estate | 2025 |
| Proptee Limited | Real estate | 2018 |
| Propupkeep Ltd | Construction | 2024 |
| Propvest 1 Ltd | Administrative & support | 2016 |
| Pros Build Ltd | Construction | 2024 |