| Pawel Build & Construction Ltd | Construction | 2021 |
| Pawfect Pace Limited | Other services | 2025 |
| Pawrek Limited | Information & communication | 2024 |
| PAY AS YOU Grow Limited | Professional & scientific | 2005 |
| Payerise Medical Limited | Professional & scientific | 2006 |
| PB Foods Kingston Limited | Hospitality | 2023 |
| PBM Advisory Limited | Professional & scientific | 2016 |
| Pbuk Projects Ltd | Construction | 2022 |
| PCB Gardens Limited | Administrative & support | 2012 |
| PCH Nineteen Limited | Professional & scientific | 2026 |
| Pcos Support Ltd | Information & communication | 2007 |
| PE Goodlett Construction Ltd | Transport & logistics | 2025 |
| Peachwood Properties Limited | Real estate | 2016 |
| Peakconversion Limited | Information & communication | 2014 |
| Pearl Diver Capital LLP | | 2008 |
| Pearl Flooring Ltd | Wholesale & retail | 2024 |
| Peba London Limited | Professional & scientific | 2012 |
| Pebble Gate Place Management Company Limited | Households | 2022 |
| Pebblestone Productions Ltd | Administrative & support | 2023 |
| Peckham Bags & Luggage Ltd | Wholesale & retail | 2019 |
| Peebles Solutions Limited | Information & communication | 2025 |
| Peekaboop Limited | Information & communication | 2025 |
| Pegasus Technical Services Limited | Construction | 2025 |
| PEL Consulting Limited | Professional & scientific | 2013 |
| Pela Therapie Limited | Other services | 2025 |
| Pelhams (Merton) NO.1 Residents Company Limited(The) | Households | 1987 |
| Pelhams (Merton) NO.2 Residents Company Limited(The) | Households | 1987 |
| Pelis Property Management Ltd | Real estate | 2018 |
| Pelvic Radiation Disease Association | Health & social care | 2012 |
| Penaja Consulting Ltd | Professional & scientific | 2019 |
| Penny Art Studio Ltd | Manufacturing | 2026 |
| Pennypot Lane Limited | Real estate | 2018 |
| Penrhyn Holdings Limited | Administrative & support | 2015 |
| Pensions, Insurance and Capital Management Limited | Financial services | 1985 |
| People Capital Ltd | Administrative & support | 2018 |
| People Dynamic Solutions Ltd | Administrative & support | 2023 |
| People Partner Plan Ltd | Extraterritorial | 2023 |
| People Passion Ltd | Professional & scientific | 2012 |
| People Process Product Ltd | Professional & scientific | 2022 |
| People With ME Ltd | Administrative & support | 2024 |
| Peoploids Limited | Information & communication | 2013 |
| Pepoman Trade Limited | Construction | 2019 |
| Peppe Catering Ltd | Hospitality | 2025 |
| Peppe Restaurant Ltd | Hospitality | 2023 |
| Peppermint Technology Holdings Limited | Administrative & support | 2015 |
| Peppermint Technology Limited | Information & communication | 2000 |
| Peppermint Technology Nominees Limited | Administrative & support | 2017 |
| Peppers Pili Pili Grill Ltd | Hospitality | 2016 |
| PER PEDES247 Limited | Professional & scientific | 2015 |
| Perdika Ltd | Professional & scientific | 2024 |
| Perfect Smile Associates Holding Limited | Health & social care | 2016 |
| Perfect Smile Associates Ltd | Health & social care | 2010 |
| Perfect Smile Earlsfield Ltd | Health & social care | 2015 |
| Perfect Treat Ltd | Other services | 2019 |
| Performance HO Ltd | Professional & scientific | 2022 |
| Performance PR Auto Motive Limited | Professional & scientific | 2003 |
| Performance PR Holdings Limited | Professional & scientific | 2014 |
| Performance PR Limited | Professional & scientific | 2000 |
| Performance PR Trustees Limited | Administrative & support | 2024 |
| Periculum Management Limited | Real estate | 2011 |
| Perpetuo Limited | Financial services | 2018 |
| Perpetuum Construction Limited | Construction | 2014 |
| Perpetuum Consulting Ltd | Professional & scientific | 2017 |
| Perpetuum Development Limited | Construction | 2011 |
| Perryjack Ltd | Professional & scientific | 2023 |
| Perseus Côte D’Ivoire Limited | Professional & scientific | 2016 |
| Perseus Nyanzaga (UK) Limited | Financial services | 2021 |
| Perseveres Care Ltd | Information & communication | 2014 |
| Person First Services Limited | Health & social care | 2025 |
| Personal Touch Distribution Limited | Transport & logistics | 2023 |
| Pesha Limited | Other services | 2025 |
| Pestell Consulting Limited | Professional & scientific | 2016 |
| Pestop London Ltd | Administrative & support | 2023 |
| Pesty Menace Limited | Information & communication | 2025 |
| Pet Trade Innovations Limited | Administrative & support | 2016 |
| Peter Bradfield Limited | Administrative & support | 2009 |
| Petroleum Software Limited | Information & communication | 1988 |
| Petter Limited | Administrative & support | 2017 |
| Peus Invest Ltd | Real estate | 2017 |
| PFF Foundation (UK) | Other services | 2025 |
| Pff-C Foundation (UK) | Other services | 2025 |
| PFM Properties Investment Limited | Real estate | 2022 |
| PGC Butler Consulting Ltd | Financial services | 2026 |
| PGE Construction Ltd | Construction | 2020 |
| PGR Management Limited | Mining & quarrying | 2008 |
| Pharaohs House Ltd | Information & communication | 2025 |
| Pharma Labelling Ltd | Other services | 2016 |
| Pharmacy Business Consultancy Ltd | Professional & scientific | 2023 |
| Pharmaops Ltd | Professional & scientific | 2024 |
| Pharmaspire Education Ltd | Education | 2025 |
| Phat Buns KT Limited | Hospitality | 2025 |
| PHI Growth Partners Limited | Professional & scientific | 2026 |
| Phil Henning Holdings Limited | Financial services | 2017 |
| Phoenician Consultants Limited | Professional & scientific | 2025 |
| Phoenix Clinic London Limited | Other services | 2022 |
| Phoenix Systems & Associates Limited | Other services | 1993 |
| Phoenyx Ventures Limited | Professional & scientific | 2018 |
| Photonia Ltd | Administrative & support | 2023 |
| Phyla Biodiversity Limited | Professional & scientific | 2021 |
| Phyla Bombax Holdco Limited | Financial services | 2025 |