| PFO Trading Limited | Real estate | 2011 |
| Phase Nine Properties Limited | Real estate | 2016 |
| Phelps Logistics Limited | Transport & logistics | 2012 |
| Phenomics Limited | Extraterritorial | 1998 |
| PHI 531 Capital Ltd | Real estate | 2023 |
| PHM Automotive Ltd | Wholesale & retail | 2023 |
| Phronesis Insight Partners Limited | Professional & scientific | 2025 |
| Physio Plus Therapy Limited | Health & social care | 2009 |
| Picinae Limited | Financial services | 2026 |
| Pieces of City Limited | Construction | 2017 |
| Pink Rose Production Ltd | Information & communication | 2025 |
| Pinnacle Asset Management Consultancy Ltd | Professional & scientific | 2025 |
| Pioneer Innovations Limited | Information & communication | 2007 |
| PIP Dunjay Ltd | Professional & scientific | 2023 |
| Pipe & Frost Ltd | Construction | 2025 |
| Pitch Direct Digital Ltd | Information & communication | 2024 |
| Planit Software Limited | Information & communication | 1987 |
| Plasticless Ltd | Manufacturing | 2020 |
| Play Verto Global Ltd | Information & communication | 2015 |
| Ploughstar Limited | Information & communication | 2013 |
| PMJ Music Ltd | Information & communication | 2015 |
| Pmmp Creative Limited | Information & communication | 2025 |
| Pmresolve Limited | Professional & scientific | 2015 |
| Pohutukawa Limited | Professional & scientific | 2016 |
| Ponderosa London Ltd | Wholesale & retail | 2025 |
| Pony Chase (Cobham) Management Company Limited | Administrative & support | 2007 |
| Porchester Capital Holding Ltd | Financial services | 2026 |
| Porchester Capital Ltd | Financial services | 2024 |
| Porchester Capital Management Ltd | Financial services | 2026 |
| Porthilly Spirit Distillery Limited | Manufacturing | 2019 |
| Porthilly Spirit Festivals Limited | Administrative & support | 2018 |
| Portland Place Nominees Limited | Extraterritorial | 2010 |
| Portland Place Secretaries Limited | Professional & scientific | 2006 |
| Portland Sky Decorating Limited | Construction | 2020 |
| Posh Party Hire Ltd | Other services | 2020 |
| PPP Consulting Limited | Information & communication | 2025 |
| PPS Pampered Pooch Limited | Other services | 2026 |
| Praaktis Limited | Information & communication | 2019 |
| Precision Retail Ltd | Wholesale & retail | 2024 |
| Premier Fuel Services Limited | Wholesale & retail | 2019 |
| Premier Mode Limited | Hospitality | 2006 |
| Press Data Future News Ltd | Professional & scientific | 2022 |
| Prestige Estate Maintenance Co. Ltd | Households | 2025 |
| Price ESG Consulting Ltd | Information & communication | 2022 |
| Prima Maritime & Logistics Consulting Services Limited | Professional & scientific | 2020 |
| Prime Advisory Services UK Ltd | Financial services | 2018 |
| Prime Mechanical Limited | Construction | 2016 |
| Prime Property London Ltd | Real estate | 2020 |
| Prism Cinema Limited | Other services | 2013 |
| Privacysecure Solutions Ltd | Information & communication | 2026 |
| Privett Homes Ltd | Real estate | 2021 |
| Privett Limited | Construction | 2022 |
| Privett London Ltd | Construction | 2003 |
| Privett Windows Limited | Wholesale & retail | 2008 |
| Prizmo Productions Limited | Administrative & support | 2021 |
| Prop Trails Limited | Administrative & support | 2024 |
| Proteome Sciences PLC | Professional & scientific | 1993 |
| Prte Limited | Construction | 2026 |
| Pulse Management UK Ltd | Construction | 2007 |
| Punkstreet Clothing Ltd | Wholesale & retail | 2025 |
| Purejo Ltd | Health & social care | 2018 |
| Putney Wharf Estate Limited | Administrative & support | 2000 |
| Pyxis Land Ltd | Real estate | 2024 |
| Pyxis Limited | Professional & scientific | 2024 |
| Qanvas Limited | Real estate | 2023 |
| Qltqnt Ltd | Construction | 2025 |
| Qmuli Limited | Manufacturing | 2006 |
| Quantauma Ltd | Information & communication | 2026 |
| Quattro Sports Group Limited | Professional & scientific | 2023 |
| Quod Erat Demonstrandum Properties Limited | Extraterritorial | 2001 |
| Qurated Limited | Hospitality | 2024 |
| R and C Tennis & Fitness Services Ltd | Arts & recreation | 2023 |
| R R Medical Ltd | Health & social care | 2004 |
| R.J. Manuel Limited | Construction | 2003 |
| RA Cheerleading and Tumbling Ltd | Arts & recreation | 2022 |
| Radcliffe Pike Consulting Ltd | Professional & scientific | 2017 |
| Raebrooke Design Studio Limited | Professional & scientific | 2022 |
| Rafa & Co Event Planning Ltd | Administrative & support | 2025 |
| Ramsay Football Coaching Consultancy Limited | Arts & recreation | 2023 |
| Randolph Court (Leatherhead) Limited | Households | 2025 |
| Raneman Group Ltd | Real estate | 2024 |
| Ranmore Fund Management Ltd | Financial services | 2008 |
| Ranson Solutions Ltd | Other services | 1999 |
| RAY of Light Photography Limited | Professional & scientific | 2018 |
| Raynes 11 Limited | Construction | 2013 |
| RB9 Enterprise Limited | Arts & recreation | 2018 |
| RB9 Properties Limited | Real estate | 2020 |
| RCA Real Estate Consulting Limited | Professional & scientific | 2018 |
| Reality FX Limited | Information & communication | 1993 |
| Rebekah Giffney Consulting Limited | Professional & scientific | 2014 |
| Rebel Labs Group Ltd | Information & communication | 2024 |
| REC Investments Ltd | Professional & scientific | 2022 |
| Red Lion Business Centre Ltd | Administrative & support | 2017 |
| Redsey Ltd | Wholesale & retail | 2020 |
| Redswan Media Limited | Information & communication | 2025 |
| Redwood Lake Ltd | Professional & scientific | 2018 |
| Redwood Shade Ltd | Financial services | 2011 |
| Reed's School Enterprises Limited | Wholesale & retail | 1990 |
| Reed's School International Ltd | Professional & scientific | 2015 |
| Reed's Schools' Charitable Trust | Education | 2026 |