| Profile Glass Limited | Manufacturing | 2009 |
| Profit From Land Limited | Financial services | 2021 |
| Profleet Vehicle Logistics Ltd | Transport & logistics | 2026 |
| Proflexclean Ltd | Administrative & support | 2016 |
| Profutsal Stoke Ltd | Arts & recreation | 2024 |
| Progressive Sports (Derbyshire) Limited | Arts & recreation | 2015 |
| Progressive Sports (Nottinghamshire) Limited | Arts & recreation | 2017 |
| Project Alpha Bidco Limited | Financial services | 2020 |
| Project Alpha Midco Limited | Financial services | 2020 |
| Project Alpha Topco Limited | Financial services | 2020 |
| Project Channel Bidco Limited | Financial services | 2019 |
| Project Channel Topco Limited | Financial services | 2019 |
| Project Creek Bidco Limited | Professional & scientific | 2026 |
| Project DJH Cube Bidco Limited | Professional & scientific | 2026 |
| Project DJH Velocity Bidco Limited | Professional & scientific | 2026 |
| Project Fire 134 Limited | Manufacturing | 1922 |
| Project Fire Overseas Limited | Financial services | 2009 |
| Project Fire Products Limited | Manufacturing | 1998 |
| Project Freelance Limited | Professional & scientific | 2014 |
| Project Groove Limited | Wholesale & retail | 2009 |
| Project Livos Bidco Limited | Professional & scientific | 2026 |
| Project Reuse Ltd | Wholesale & retail | 2026 |
| Projectric PM Services Limited | Administrative & support | 2013 |
| Projects From Pallets CIC | Manufacturing | 2022 |
| Proklean Solutions Ltd | Administrative & support | 2026 |
| Promax Imaging Limited | Information & communication | 2000 |
| Promind Capital Limited | Professional & scientific | 2020 |
| Promo-Drinkware Ltd | Manufacturing | 2015 |
| Promotional Ceramics Limited | Manufacturing | 1984 |
| Promtek Limited | Manufacturing | 1988 |
| Proper JOB Collective Ltd | Professional & scientific | 2026 |
| Proper Mart Ltd | Wholesale & retail | 2025 |
| Proper Unions 2 Limited | Real estate | 2020 |
| Proper Unions 3 Limited | Real estate | 2021 |
| Proper Unions 4 Limited | Real estate | 2022 |
| Propert Eaze Ltd | Financial services | 2025 |
| Property by Default Ltd | Real estate | 2022 |
| Property DOT Ltd | Real estate | 2024 |
| Property Genix Limited | Real estate | 2021 |
| Property Investinator Ltd | Real estate | 2019 |
| Property Investments Stoke Ltd | Real estate | 2025 |
| Property Logix PVT Ltd | Real estate | 2024 |
| Property Productivity Ltd | Real estate | 2019 |
| Property Retreat Limited | Real estate | 2022 |
| Property Services AC Ltd | Real estate | 2020 |
| Property-Rite Ltd | Real estate | 2024 |
| Propertyhelpers Limited | Professional & scientific | 2002 |
| Prophysio UK Limited | Health & social care | 2000 |
| Propitable Ltd | Real estate | 2018 |
| Prospects Developer Ltd | Construction | 2023 |
| Prosper Academia Limited | Education | 2018 |
| Prospera Property Holdings Ltd | Real estate | 2026 |
| Prostairs Ltd | Manufacturing | 2026 |
| Protec Doors Limited | Construction | 2017 |
| Protectapet Ltd | Construction | 2014 |
| Protein Punch Meals Ltd | Manufacturing | 2024 |
| Proto Precision Engineering Ltd | Manufacturing | 2024 |
| Protrade Bathrooms Ltd | Wholesale & retail | 2026 |
| Proventus Nova Solutions Ltd | Professional & scientific | 2025 |
| Provestor ML Ltd | Real estate | 2024 |
| Providence Estates Limited | Real estate | 2022 |
| Provisional Marmalade Limited | Financial services | 2008 |
| Proxima (Cheshire) Limited | Real estate | 2019 |
| PRP Builders Ltd | Financial services | 2025 |
| PRT Training Limited | Education | 2022 |
| Przemyslaw Palyska Ltd | Construction | 2017 |
| PS Mailing Limited | Transport & logistics | 2025 |
| PSB Group Ltd | Manufacturing | 1962 |
| Psdb Limited | Real estate | 2024 |
| PSI Speciality GAS Engineering Limited | Manufacturing | 2007 |
| PSK Developments Limited | Construction | 2022 |
| PSK Warehousing Limited | Transport & logistics | 2021 |
| Psmedia Holdings Limited | Financial services | 2019 |
| PSS Properties Services Limited | Real estate | 2005 |
| PSX Digital Limited | Information & communication | 2015 |
| PT (Longton) Limited | Hospitality | 2017 |
| PT Print 3D Limited | Wholesale & retail | 2025 |
| PTR Move Management Ltd | Transport & logistics | 2023 |
| PTR Pubs Company Limited | Hospitality | 2019 |
| PTY Consulting Limited | Construction | 2014 |
| Pudley's Point Limited | Professional & scientific | 2014 |
| Puff Place Ltd | Wholesale & retail | 2025 |
| Pukhraj Properties Ltd | Real estate | 2023 |
| Pulau Properties Ltd | Hospitality | 2021 |
| Pulp Films Limited | Information & communication | 2010 |
| Pulsemanaged Limited | Information & communication | 2025 |
| Pump in Concrete Limited | Construction | 2015 |
| Punctual Limited | Wholesale & retail | 2025 |
| Punjabi Chon-Ka Ltd | Hospitality | 2025 |
| Purcells Parcels Ltd | Transport & logistics | 2024 |
| Pure Desi Flames UK Ltd | Hospitality | 2024 |
| Pure Evidence Labs Ltd | Professional & scientific | 2024 |
| Pure Home Improvements Ltd | Construction | 2026 |
| Pure Precision Investment Holdings Limited | Real estate | 2025 |
| Pure Steel Ltd | Construction | 2023 |
| Pure Transparent Limited | Administrative & support | 2014 |
| Purebuild Ltd | Construction | 2025 |
| Purebuild Team Ltd | Construction | 2026 |
| Pureline Freight Ltd | Transport & logistics | 2026 |
| Purely Clean Limited | Administrative & support | 2025 |