| Pedicure Perfection Ltd | Other services | 2021 |
| Peek Boutique Limited | Wholesale & retail | 2012 |
| Peek for HIM Limited | Wholesale & retail | 2017 |
| Peeled Banana Ltd | Information & communication | 2023 |
| Peer Productions | Education | 2006 |
| Peers ICT Ltd | Information & communication | 2016 |
| Pegasus G1 Limited | Financial services | 2026 |
| Pegasus G2 Limited | Financial services | 2026 |
| Pegasus Global Investments Limited | Construction | 2025 |
| Pegasus Hotel UK Limited | Financial services | 2025 |
| Pegasus Hotels & Resorts Limited | Hospitality | 2025 |
| Pegasus Hotels Holding Limited | Financial services | 2025 |
| Pegasus Services Group Ltd | Hospitality | 2026 |
| Pelhams Property Investments Ltd | Households | 2026 |
| Pelissier UK Limited | Manufacturing | 2015 |
| Pell Croft Properties Limited | Other services | 2010 |
| Pelorusdigital Ltd | Professional & scientific | 2018 |
| Pemba Bloodstock Limited | Agriculture & fishing | 2024 |
| Pembroke Creative Limited | Arts & recreation | 2025 |
| Pendle Connections Ltd | Information & communication | 2001 |
| Penhela Associates Limited | Professional & scientific | 1996 |
| Penly Homes Ltd | Hospitality | 2023 |
| Penrose Media & Communications Limited | Manufacturing | 2004 |
| Pensact Limited | Professional & scientific | 2020 |
| Penshurst Walk Management Company Limited | Households | 2018 |
| Pentire Residents Company Limited | Households | 2001 |
| Penwood END Consulting Ltd | Professional & scientific | 2024 |
| Peper Harow Securities Ltd | Real estate | 2006 |
| Pepieux Pictures Ltd | Information & communication | 2023 |
| Perdrix Communications Ltd | Administrative & support | 2012 |
| Perdrix Limited | Information & communication | 2009 |
| Peregrine Cloud Ltd | Information & communication | 2013 |
| Perfect Choice Roofing Ltd | Construction | 2021 |
| Perfect Home Construction Group Ltd | Construction | 2025 |
| Perfect Procurement Ltd | Wholesale & retail | 2018 |
| Perfect Roofing Solution Ltd | Construction | 2025 |
| Perfect Tenancy Cleaning Services Ltd | Administrative & support | 2024 |
| Perfimprovement Ltd | Professional & scientific | 2023 |
| Perform Logistics International Limited | Extraterritorial | 2024 |
| Perform Logistics Ltd | Transport & logistics | 2011 |
| Perform Property Services Ltd | Real estate | 2023 |
| Performance.Io Limited | Information & communication | 2017 |
| Perifrith Advisory Ltd | Professional & scientific | 2026 |
| Peritus International Limited | Professional & scientific | 2009 |
| Permanent Property Solution Ltd | Construction | 2023 |
| Personal Computers Limited | Information & communication | 1998 |
| Perticarari Consultancy Limited | Administrative & support | 2017 |
| Peter Christmas Advisory Ltd | Professional & scientific | 2014 |
| Peter Jones Hair Design Limited | Other services | 2012 |
| Peter Silvester & Sons Ltd | Wholesale & retail | 2003 |
| Peterwoodwardilc Limited | Administrative & support | 2016 |
| Petrolectable Design Ltd | Wholesale & retail | 2023 |
| PF Mayford Limited | Arts & recreation | 2022 |
| PG Acoustics Limited | Professional & scientific | 2025 |
| PG Mitigation Limited | Professional & scientific | 2025 |
| PGL Builders Ltd | Construction | 2024 |
| Phaman Limited | Real estate | 2018 |
| Pharma GPT Ltd | Information & communication | 2023 |
| Pharmacomm Ltd | Other services | 2003 |
| Pharmadvisor Limited | Health & social care | 2021 |
| Pharmas Market Ltd | Professional & scientific | 2012 |
| Phene Capital Limited | Professional & scientific | 2020 |
| Phenomenon Creations Ltd | Information & communication | 2017 |
| Pheonixx Services Limited | Construction | 2014 |
| Phewa Catering Limited | Hospitality | 2019 |
| PHG Direct Limited | Wholesale & retail | 2006 |
| PHI Alpha Analytics Ltd | Professional & scientific | 2024 |
| PHI Property Acquisitions Limited | Real estate | 2025 |
| PHI Technology Solutions Limited | Information & communication | 2025 |
| PHI Works Limited | Construction | 2021 |
| Philm London Ltd | Information & communication | 2017 |
| Philotes Limited | Other services | 2017 |
| Philpott Black Limited | Professional & scientific | 2015 |
| Phipps Autos Limited | Wholesale & retail | 1955 |
| PHM Ltd | Information & communication | 2026 |
| Phoenalpha Limited | Professional & scientific | 2013 |
| Phoenix Advisory Services Ltd | Professional & scientific | 2009 |
| Phoenix Beauty Ltd | Wholesale & retail | 2018 |
| Phoenix Court SE13 RTM Company Ltd | Households | 2023 |
| Phoenix Cultural Centre Community Interest Company | Arts & recreation | 2015 |
| Phoenix Dental Academy Ltd | Education | 2020 |
| Phoenix Heights Holdings Ltd | Real estate | 2026 |
| Phoenix K9 Training Inc Limited | Other services | 2022 |
| Phoenix Rollers(Otley)Limited | Professional & scientific | 1964 |
| Phoenix Running Kent Ltd | Arts & recreation | 2026 |
| Photoplay Productions Limited | Information & communication | 1989 |
| Phronesis Software Ltd | Information & communication | 2012 |
| PHW Properties Ltd | Real estate | 2017 |
| PHX K9 Mentorship & Events Ltd | Education | 2023 |
| Phyonis Ltd | Other services | 2018 |
| Physical Health Physiotherapy Ltd | Health & social care | 2026 |
| Piajeh Limited | Wholesale & retail | 1998 |
| Piazza Properties Ltd | Construction | 2024 |
| Picasso Bevington Freehold Limited | Households | 2017 |
| Picc-Me Ltd | Manufacturing | 2018 |
| Pickle Tree Ltd | Professional & scientific | 2023 |
| Pickled Crab Limited | Arts & recreation | 2023 |
| PIE & PIE Limited | Professional & scientific | 2018 |
| Pier 99 Ltd | Extraterritorial | 2018 |
| Pierhouse Asia Pacific Ltd | Information & communication | 2011 |