| Pristine Clothes Care Ltd | Wholesale & retail | 2016 |
| Pristine Ideas Limited | Wholesale & retail | 2018 |
| Pristine Peak Enterprises Ltd | Wholesale & retail | 2024 |
| Privado Social Care Ltd | Health & social care | 2015 |
| Privyseal Limited | Information & communication | 2015 |
| Prize Field Developments Ltd | Real estate | 2005 |
| Prizes Galore Ltd | Arts & recreation | 2025 |
| Pro Elixir Wholesale Ltd | Wholesale & retail | 2024 |
| Pro FA Medley Limited | Arts & recreation | 2019 |
| Pro Outsource Ltd | Financial services | 2025 |
| Pro Padel Direct Ltd | Wholesale & retail | 2025 |
| Pro Tax Assist Limited | Professional & scientific | 2024 |
| Pro Van Lock Solutions Limited | Other services | 2026 |
| Pro-Motor | Other services | 1994 |
| Pro-Securing Limited | Administrative & support | 2024 |
| Proactive-Solutions (Zest for Business) Ltd | Professional & scientific | 2014 |
| Probate Property Buyers Limited | Real estate | 2026 |
| Probox Recruitment Ltd | Information & communication | 2024 |
| Process Mechanical Services Ltd | Extraterritorial | 2024 |
| Procopio’S Pantry Ltd | Hospitality | 2020 |
| Procura Homes Limited | Health & social care | 2024 |
| Procurabuild Ltd | Wholesale & retail | 2026 |
| Produce People Recruitment Limited | Administrative & support | 2017 |
| PRODUCT84 Ltd | Wholesale & retail | 2026 |
| Production Days Ltd | Administrative & support | 2022 |
| Productt Ltd | Professional & scientific | 2024 |
| Proelevate Marketing Ltd | Information & communication | 2024 |
| Proex Trading Ltd. | Other services | 2018 |
| Proexec Leads Ltd | Professional & scientific | 2024 |
| Prof. Franceschi Shoulder Limited | Health & social care | 2026 |
| Professional Administration Ltd | Administrative & support | 2015 |
| Profile Homes Limited | Construction | 2022 |
| Profile Plastics (East Anglia) Limited | Wholesale & retail | 2023 |
| Profolyx Identity Layouts Ltd | Manufacturing | 2026 |
| Progressive Furniture Ltd | Wholesale & retail | 2004 |
| Prohealth Innovations Ltd | Health & social care | 2024 |
| Project 317 Limited | Professional & scientific | 2008 |
| Project Accountability PA Limited | Administrative & support | 2024 |
| Project Health Ltd | Health & social care | 2022 |
| Project Legacy Ltd | Professional & scientific | 2025 |
| Project Management Academy Limited | Education | 2019 |
| Project Management Professionals Ltd | Administrative & support | 2024 |
| Project Rome Bidco Limited | Financial services | 2022 |
| Project Rome Midco Limited | Financial services | 2022 |
| Project Rome Topco Limited | Financial services | 2022 |
| Project S E Anglia Limited | Professional & scientific | 2011 |
| Project Wordplay CIC | Arts & recreation | 2025 |
| PROJECT0404 Ltd | Manufacturing | 2026 |
| Projekt Design & Build (UK) Ltd | Construction | 2024 |
| Projexiq Ltd | Information & communication | 2022 |
| Prolificplex Ltd | Wholesale & retail | 2024 |
| Proline Engineering EA Ltd | Manufacturing | 2011 |
| Prolink Logistics Ltd | Transport & logistics | 2026 |
| PROMAP86 Ltd | Wholesale & retail | 2022 |
| Promed Staffing Ltd | Administrative & support | 2021 |
| Promesse Ventures Group(Pvg) Ltd | Financial services | 2024 |
| Prometa Limited | Manufacturing | 2022 |
| Prometral Marketing Limited | Information & communication | 2026 |
| Promota (UK) Limited | Other services | 1999 |
| Prona Upgrades Ltd | Wholesale & retail | 2026 |
| Pronto Food Service Ltd | Hospitality | 2017 |
| Proof of Life Ltd | Administrative & support | 2025 |
| Proofiti Limited | Information & communication | 2024 |
| Proofpoint Limited | Information & communication | 2004 |
| Prop Rentals Ltd | Real estate | 2023 |
| Propease Ltd | Information & communication | 2025 |
| Properties 1986 Limited | Real estate | 2019 |
| Properties HD Limited | Real estate | 2025 |
| Property AZ Ltd | Real estate | 2025 |
| Property Developments West Ltd | Construction | 2023 |
| Property Hays Ltd | Hospitality | 2022 |
| Property Links Group Ltd | Real estate | 2023 |
| Property Partner Group Ltd | Real estate | 2019 |
| Property Pundits Ltd | Real estate | 2020 |
| Property Resolution Services Ltd | Construction | 2024 |
| Property Solutions and Development Limited | Construction | 2013 |
| Propertybydixon Ltd | Real estate | 2024 |
| Propertysmiths Accommodation Ltd | Real estate | 2023 |
| Propertysmiths Ltd | Professional & scientific | 2023 |
| Propertywithken Ltd | Real estate | 2024 |
| Prophase Cleaning Services Ltd | Administrative & support | 2025 |
| Propnautics Ltd | Real estate | 2024 |
| Proponent Property Limited | Real estate | 2022 |
| Propsty Limited | Information & communication | 2024 |
| Propview Ltd | Administrative & support | 2018 |
| Proskill Engineering Limited | Manufacturing | 2020 |
| Prospa Advisory Limited | Administrative & support | 2026 |
| Prostrawsystems Ltd | Agriculture & fishing | 2021 |
| Prosyma Research Limited | Professional & scientific | 1987 |
| Protec Secure Ltd | Financial services | 2025 |
| Protech International Services Ltd | Information & communication | 2025 |
| Protect First Security Solutions Ltd | Financial services | 2023 |
| Proteus Investments Limited | Real estate | 2012 |
| Proteus Land Limited | Real estate | 2018 |
| Protium Energy Solutions Ltd | Professional & scientific | 2024 |
| Proxima International Ltd | Information & communication | 2025 |
| Prudent People Ltd | Professional & scientific | 2012 |
| Prudent Pixel Ltd | Information & communication | 2018 |
| PRX Locum Limited | Health & social care | 2022 |
| PS August Ltd | Wholesale & retail | 2026 |