| Pocket FD Limited | Professional & scientific | 2022 |
| Pointer PPM Ltd | Professional & scientific | 2021 |
| Pokelivery Ltd | Wholesale & retail | 2025 |
| Pokichloe Entertainment Ltd | Information & communication | 2021 |
| Pokétrio Cards Ltd | Wholesale & retail | 2025 |
| Pomme D'Or Investments Ltd | Real estate | 2004 |
| Pontus Ltd | Information & communication | 2019 |
| Poseidonas Couriers Ltd | Transport & logistics | 2023 |
| Poshers Ltd | Construction | 2017 |
| Potten Farm Equestrian LLP | | 2005 |
| Potters Accounting and Finance Limited | Professional & scientific | 2017 |
| Potters Accounting North Limited | Professional & scientific | 2026 |
| Power of Chatt LLP | | 2019 |
| PPP Services UK Ltd | Information & communication | 2016 |
| PR Advisory Services Ltd | Professional & scientific | 2025 |
| PR Structures Ltd | Construction | 2023 |
| PR Traders Ltd | Wholesale & retail | 2024 |
| Prasad Kothari Limited | Real estate | 2013 |
| Precision Unmanned Limited | Professional & scientific | 2025 |
| Premium Care Solutions (Holdings) Limited | Financial services | 2023 |
| Prepare Intellectually Ltd | Education | 2023 |
| Prescient Education Ltd | Education | 2012 |
| Prestige Parcels Line Ltd | Transport & logistics | 2026 |
| Prestonland Limited | Real estate | 1983 |
| Prime Bienestar Limited | Health & social care | 2023 |
| Prime Elevations Limited | Construction | 2023 |
| Prime Park Properties Limited | Real estate | 2024 |
| Prime Refrigerated Transport Ltd | Transport & logistics | 2016 |
| Primelodge Limited | Real estate | 2015 |
| Primrose Property Limited | Administrative & support | 2016 |
| Primtech Limited | Wholesale & retail | 2020 |
| Princeton Square Limited | Information & communication | 2011 |
| Pripat Consulting Limited | Health & social care | 2024 |
| Prismatic Solutions Limited | Wholesale & retail | 2017 |
| Pritesh Patel Services Limited | Health & social care | 2020 |
| Prizefighters FC Ltd | Hospitality | 2023 |
| Pro-Sparx Limited | Construction | 2013 |
| PRO2 Ltd | Real estate | 2021 |
| Probably Edible Ltd | Information & communication | 2026 |
| Process Transfer Limited | Professional & scientific | 2013 |
| Productivitysimple Limited | Information & communication | 2017 |
| Professional Insights Ltd | Professional & scientific | 2018 |
| Professional Total Maintenance Ltd | Construction | 2021 |
| Programmes & Portfolios Ltd | Professional & scientific | 2021 |
| Progressional IT Services Limited | Professional & scientific | 2022 |
| Progressive Purification Systems Limited | Real estate | 1945 |
| Progroup UK Ltd | Administrative & support | 2007 |
| Promac Limited | Construction | 2023 |
| Prooptiki Ltd | Transport & logistics | 2023 |
| Prop Store Group Limited | Financial services | 2022 |
| Prop Store Limited | Wholesale & retail | 2013 |
| Propela Ventures Ltd | Real estate | 2024 |
| Property Makeover LDA Limited | Construction | 2018 |
| Property POT MS Ltd | Professional & scientific | 2025 |
| Prospec Design and Build Ltd | Construction | 2022 |
| Pryority Telecom Limited | Information & communication | 2012 |
| PSA Spares Limited | Professional & scientific | 2010 |
| PSL Consultancy Limited | Professional & scientific | 2023 |
| Psychological and Educational Consultancy Ltd. | Health & social care | 2015 |
| PT Coaching LLP | | 2017 |
| PT Fire Systems Ltd | Manufacturing | 2022 |
| PT Structures Ltd | Professional & scientific | 2022 |
| Public Consultations Agency Limited | Professional & scientific | 2020 |
| Pump Paddock Management Company Limited | Households | 2014 |
| Pure EW Ltd | Professional & scientific | 2018 |
| Purple Box Solutions Ltd | Households | 2025 |
| PVF Group Limited | Arts & recreation | 2025 |
| Pwdz Consulting Limited | Information & communication | 2026 |
| Pylon Electrical Ltd | Construction | 2016 |
| Pyramid Embalming Services Ltd | Other services | 2017 |
| Pyrenergy EP Ltd | Energy | 2018 |
| Pyrenergy Limited | Energy | 2018 |
| Pyrometrix Ltd | Construction | 2025 |
| Q P Test Services Limited | Professional & scientific | 2003 |
| Qasco Ltd | Administrative & support | 2021 |
| Qassid Homes Ltd | Real estate | 2020 |
| Qlique Limited | Information & communication | 2021 |
| Quadleague Computers Limited | Financial services | 1990 |
| Quality Care Choices Ltd | Information & communication | 2021 |
| Quality Property Rentals LLP | | 2025 |
| Quartrange Ltd | Professional & scientific | 2009 |
| Qudrat Security Ltd | Administrative & support | 2025 |
| Queenside Games Limited | Manufacturing | 2016 |
| Quevega Consulting LLP | | 2017 |
| R & D Management (London) Limited | Construction | 2000 |
| R & W Plant Hire Limited | Construction | 2021 |
| R L Supplies Limited | Wholesale & retail | 1998 |
| R Prabhakar Healthcare Ltd | Health & social care | 2018 |
| R Prabhakar Properties Limited | Real estate | 2019 |
| R S Duffy Ltd | Professional & scientific | 2010 |
| R Spencer Tucker Limited | Construction | 2021 |
| R V Plumbing & Heating Limited | Construction | 2010 |
| R X Electrics Ltd | Construction | 2014 |
| R&K Heating Solutions Ltd | Construction | 2024 |
| R. D. Wall Consulting Ltd | Financial services | 2014 |
| R.B.S. Corporation Limited | Professional & scientific | 2017 |
| R.S.Imp-Exp Limited | Wholesale & retail | 2013 |
| R2 Consultancy Ltd | Administrative & support | 2020 |
| R43 Limited | Administrative & support | 2026 |
| Rabbit Investments Holdings Ltd | Financial services | 2019 |