| Prabayas Ltd | Transport & logistics | 2020 |
| Pran IT Consulting Ltd | Information & communication | 2016 |
| Pras Consulting Limited | Wholesale & retail | 2025 |
| Pratham Productions Ltd | Information & communication | 2012 |
| Preciouswell Care Ltd | Hospitality | 2025 |
| Precise Cleaners Limited | Administrative & support | 2014 |
| Precision Healthinfo Ltd | Information & communication | 2023 |
| Premier Fire Services Ltd. | Professional & scientific | 2006 |
| Premier QS Services Ltd. | Construction | 2013 |
| Prerans IT Solutions Limited | Information & communication | 2020 |
| Prestige Bookkeeping Solutions Limited | Professional & scientific | 2026 |
| Prestige Fires & Flue Services Ltd | Administrative & support | 2019 |
| Prestige Fires & Stoves Ltd | Administrative & support | 2022 |
| Presto! Performing Arts Ltd | Arts & recreation | 2022 |
| Pretty Little Party Shop Ltd | Wholesale & retail | 2015 |
| Primary Care REG Consulting Ltd | Professional & scientific | 2026 |
| Primatas Limited | Professional & scientific | 2008 |
| Prime Home Solutions Limited | Information & communication | 2020 |
| Prime Properties Global Limited | Households | 2023 |
| Prime Properties Worldwide Limited | Households | 2023 |
| Prime Transport & Mechanics Limited | Wholesale & retail | 2021 |
| PRIME8 Productions UK Limited | Administrative & support | 2005 |
| PRIME8 Properties Limited | Real estate | 2017 |
| Primus Healthcare Limited | Health & social care | 2012 |
| Pringle.Design+ Limited | Professional & scientific | 2014 |
| Privilege Epsom Ltd | Wholesale & retail | 2022 |
| Pro T&C Services Ltd | Construction | 2023 |
| Probalance Solutions Limited | Professional & scientific | 2024 |
| Process & Energy Limited | Professional & scientific | 2006 |
| Processing & Packaging Machinery Association Limited | Other services | 1987 |
| Procullux Limited | Professional & scientific | 2000 |
| Professional Boundaries C.I.C | Other services | 2009 |
| Professional Car Wash & Valeting Ltd | Wholesale & retail | 2017 |
| Profurb Ltd | Construction | 1997 |
| PROJECT89CONSTRUCTION Ltd | Construction | 2022 |
| Projekt Photography Limited | Professional & scientific | 1984 |
| Prolink (EUR) Solutions Ltd | Information & communication | 2025 |
| Proper Casa Ltd | Real estate | 2020 |
| Property Core Solutions Ltd | Real estate | 2021 |
| Property Prime Ltd | Construction | 2025 |
| PRORENDER1 Limited | Construction | 2023 |
| Protec Fire Safety Ltd | Professional & scientific | 2013 |
| Protein (Europe) Ltd | Wholesale & retail | 2020 |
| Protein Blender Ltd | Wholesale & retail | 2020 |
| Protein Life Limited | Wholesale & retail | 2014 |
| Protein Packaging Ltd | Administrative & support | 2020 |
| Protein Worldwide Ltd | Wholesale & retail | 2023 |
| Protocol Fire Systems Limited | Administrative & support | 2023 |
| Provest Holdings Limited | Professional & scientific | 2017 |
| Providence Systems Ltd | Information & communication | 2015 |
| PSA3 Limited | Real estate | 2018 |
| Psfc Ltd | Wholesale & retail | 2020 |
| PTCS2016 Limited | Professional & scientific | 2016 |
| PTS 2001 Ltd | Construction | 2014 |
| Pumex Ltd. | Transport & logistics | 2003 |
| Pure Bullion Limited | Wholesale & retail | 2023 |
| Pure Squash Ltd | Arts & recreation | 2019 |
| Pure Stay Limited | Households | 2017 |
| Pureace Limited | Professional & scientific | 2013 |
| Purvis Stevens LLP | | 2007 |
| PVD Group Ltd | Wholesale & retail | 2023 |
| PVD Retail Ltd | Wholesale & retail | 2024 |
| Pyramid Solutions Limited | Construction | 2013 |
| Q Auto Spa Ltd | Administrative & support | 2025 |
| Q.E.D Building Services Maintenance Limited | Manufacturing | 1997 |
| QH Care Services Limited | Health & social care | 2020 |
| QH Homes Limited | Hospitality | 2023 |
| QK Consultancy Limited | Professional & scientific | 2009 |
| QOB Construction Ltd | Extraterritorial | 2013 |
| QOB Holding Company Limited | Financial services | 2014 |
| QOB Interiors Ltd | Construction | 2001 |
| QP Foods UK Ltd | Wholesale & retail | 2021 |
| QR Sussex Limited | Construction | 2022 |
| QT Financial Ltd | Financial services | 2019 |
| Quadfringe Ltd | Construction | 2014 |
| Quality Bookkeeping Ltd | Other services | 2020 |
| Quality Construction & Maintenance Ltd | Construction | 2022 |
| Quantum Fibre Solutions Limited | Information & communication | 2015 |
| Quantum Sport Analytics Ltd | Information & communication | 2023 |
| Quarterbak Ltd | Information & communication | 2022 |
| Quews Ltd | Manufacturing | 2020 |
| Quews Media Ltd | Information & communication | 2010 |
| Quid Mart Ltd | Wholesale & retail | 2025 |
| Quintessentially English Limited | Extraterritorial | 2012 |
| Quintessentially English UK Limited | Administrative & support | 2008 |
| Quintessentially Limited | Administrative & support | 2000 |
| R & M Thai Village Ltd | Hospitality | 2020 |
| R IT Services Ltd | Information & communication | 2019 |
| R&H Services Ltd | Real estate | 2017 |
| R.A. Stinson Heating Limited | Construction | 2009 |
| R4 Consultancy Ltd | Professional & scientific | 2021 |
| Raalphestates Ltd | Real estate | 2021 |
| Raavi Consulting Limited | Information & communication | 2013 |
| Rabbi Services Limited | Construction | 2025 |
| Rachel Eveline Ltd | Other services | 2026 |
| Rachel Property Limited | Real estate | 2020 |
| Rachelle Beltran Limited | Information & communication | 2017 |
| Radiant Smile Tourism Ltd | Administrative & support | 2025 |
| Radiate Festival Limited | Hospitality | 2020 |
| Raeburn House Management Company Limited | Households | 1979 |