| Paul Chowdhry Productions Limited | Arts & recreation | 2003 |
| Paul Codling Ltd | Construction | 2013 |
| Paul Jairaj Ltd | Health & social care | 2010 |
| PAV RX Ltd | Wholesale & retail | 2022 |
| Pavilion Property Group Limited | Real estate | 2025 |
| Pavilion Sports Tours Ltd | Administrative & support | 2026 |
| Pavini Ltd | Information & communication | 2010 |
| Paygenix Consulting Ltd | Professional & scientific | 2023 |
| Pb's Locum Services Limited | Wholesale & retail | 2010 |
| Pbsv Ltd | Hospitality | 2024 |
| PCM Carpentry Ltd | Construction | 2023 |
| PCO London Limited | Education | 2017 |
| PCP Pharma Limited | Wholesale & retail | 2018 |
| PD Building Ltd | Construction | 2025 |
| PDG Elite Ltd | Administrative & support | 2025 |
| PE Capital Services Ltd | Other services | 2021 |
| Peacevale Ltd | Wholesale & retail | 2022 |
| Peak Management Solutions Ltd | Information & communication | 2014 |
| Peakwarm Limited | Construction | 1987 |
| Pearcare Pharma Ltd | Wholesale & retail | 2025 |
| Pearse Property Investments Limited | Administrative & support | 2018 |
| Peculium Investments Limited | Real estate | 2018 |
| Pedley Properties Limited | Construction | 1964 |
| Peer Lindgreen Limited | Professional & scientific | 2007 |
| Pegasus (Colchester) Developments Limited | Real estate | 2022 |
| Pegasus (Prested) Investments Limited | Financial services | 2018 |
| Pegasus (West Bergholt) Development Limited | Real estate | 2024 |
| Pegasus Developments Holdings Limited | Financial services | 2025 |
| Pegasus DG Developments Limited | Real estate | 2021 |
| Pegasus One Limited | Real estate | 2017 |
| Pelkor Capital Ltd | Financial services | 2018 |
| Pendagarmi Limited | Professional & scientific | 2019 |
| Pendulum Properties Ltd | Real estate | 2019 |
| Penling Heights Limited | Real estate | 2019 |
| Pennekamp Limited | Other services | 2013 |
| Pensarn Acquisitions Limited | Households | 2019 |
| Pensarn Investments Limited | Real estate | 2019 |
| Pensions Project Services Ltd | Professional & scientific | 2003 |
| Penta Therapeutics Limited | Professional & scientific | 2016 |
| People and Product Limited | Information & communication | 2016 |
| Peot Property Maintenance Ltd | Administrative & support | 2023 |
| Peracto Ltd | Professional & scientific | 2023 |
| Perez Rose Limited | Other services | 2012 |
| Perfect Paint Limited | Manufacturing | 2013 |
| Performa Limited | Information & communication | 2023 |
| Peri Peri Express (Uxbridge) Ltd | Hospitality | 2022 |
| Peridot Properties Ltd | Real estate | 2017 |
| Perla Bianca Limited | Construction | 2020 |
| Personal Trainer at Home Ltd | Education | 2023 |
| Pest Music Limited | Information & communication | 2023 |
| Petcentral Limited | Wholesale & retail | 2024 |
| Peter Fraser Copywriting Limited | Professional & scientific | 2018 |
| Peter Gaffney Personal Training Ltd | Other services | 2014 |
| Peter Jacobs Consulting Ltd | Professional & scientific | 2024 |
| Peter Salisbury Piano Services Limited | Professional & scientific | 2021 |
| Petersfield Holdings Ltd | Financial services | 2024 |
| Petersfield Medicines Ltd | Wholesale & retail | 2022 |
| Petlondon Trading Limited | Wholesale & retail | 2003 |
| Petre Metal Construction Ltd | Construction | 2017 |
| Petroplastics & Chemicals Holdings Limited | Financial services | 2022 |
| Petroplastics & Chemicals Limited | Wholesale & retail | 1973 |
| Petts Wood Pharmacy Limited | Wholesale & retail | 2007 |
| PG Skylight Limited | Construction | 2018 |
| Phall Limited | Hospitality | 2022 |
| Pharma Contractors Limited | Health & social care | 2016 |
| Pharmabyte Ltd | Other services | 2015 |
| Pharmacentric Limited | Wholesale & retail | 2006 |
| Pharmacy Friends Limited | Other services | 2022 |
| PHARMACY4YOU Limited | Wholesale & retail | 2008 |
| Pharmaken Limited | Wholesale & retail | 2022 |
| Pharmalliance Limited | Professional & scientific | 2024 |
| Pharmastar Limited | Administrative & support | 2008 |
| Phelps Holdings Ltd | Professional & scientific | 2017 |
| Philip Jones Barristers Intermediaries Ltd. | Professional & scientific | 2022 |
| Philip Jones Legal Ltd. | Professional & scientific | 2019 |
| Philmont Properties UK Limited | Real estate | 2006 |
| Phlox Advisors Limited | Information & communication | 2019 |
| Phoenix Financial Consultants Limited | Financial services | 2010 |
| Phoenix Invest Limited | Real estate | 2025 |
| Phone & Home Decor Ltd | Wholesale & retail | 2024 |
| Photon Actuarial Ltd | Professional & scientific | 2024 |
| PHP Locum Services Ltd | Professional & scientific | 2026 |
| Physique Recovery Limited | Health & social care | 2022 |
| PI 900 Limited | Real estate | 2006 |
| Pi-Gen (Bexley) Ltd | Wholesale & retail | 2024 |
| Pi-Gen (Ilford) Ltd | Wholesale & retail | 2024 |
| Pi-Gen (Maidstone) Ltd | Wholesale & retail | 2024 |
| Pi-Gen (Purley) Ltd | Wholesale & retail | 2024 |
| Pi-Gen (Raynes Park) Ltd | Wholesale & retail | 2024 |
| Pi-Gen (Wimbledon) Ltd | Wholesale & retail | 2024 |
| Pi-Gen Pharma Ltd. | Wholesale & retail | 2002 |
| Pianobeats Ltd | Education | 2020 |
| Piatti DI Salwa Ltd | Wholesale & retail | 2019 |
| Pick and Play Events Limited | Wholesale & retail | 2022 |
| Picture This Studios Ltd | Manufacturing | 2025 |
| Pierce Tyler Tattoo Ltd | Real estate | 2023 |
| Pilk Plants Ltd | Administrative & support | 2026 |
| Pill Zone Limited | Wholesale & retail | 2022 |
| Pimbley Ltd | Information & communication | 2019 |
| Pinakin Consultants Ltd | Information & communication | 2016 |