| Pedwar Consulting Limited | Professional & scientific | 2022 |
| Pegasus Private Wealth Ltd | Extraterritorial | 2026 |
| Pelagic Solutions Limited | Administrative & support | 2024 |
| Peloton Business Services Limited | Professional & scientific | 2013 |
| Pemberley Place Management Company Limited | Households | 2007 |
| Pembers of Winchester Ltd | Real estate | 2012 |
| PEN Hill Paper and Film Limited | Wholesale & retail | 2002 |
| Pencil Media Limited | Administrative & support | 2011 |
| Penfold & Mcpherson Limited | Professional & scientific | 2015 |
| Peninsula Square Charging Ltd. | Energy | 2021 |
| Penny Farthing House Management Limited | Households | 2017 |
| Pennymanagement Ltd | Real estate | 2019 |
| Pentire Property Consultancy Ltd | Real estate | 2023 |
| Penult 102 Limited | Extraterritorial | 2022 |
| Penult 103 Limited | Extraterritorial | 2022 |
| Penult 104 Limited | Extraterritorial | 2022 |
| Penult 202 Limited | Extraterritorial | 2010 |
| Penult Capital Partners Limited | Financial services | 2009 |
| Penult Ground Rents NO12 Limited | Real estate | 2015 |
| Penult Holdings Limited | Financial services | 2009 |
| Penult Housing Limited | Extraterritorial | 2019 |
| Penult SF Limited | Real estate | 2014 |
| People's Projects Limited | Professional & scientific | 2006 |
| Peppermint Inc Ltd | Professional & scientific | 2025 |
| Perfect Beginnings Limited | Wholesale & retail | 2004 |
| Performance Chef Ltd | Hospitality | 2018 |
| Performance Chef Solutions Ltd | Arts & recreation | 2026 |
| Pergall Media Limited | Information & communication | 2006 |
| Permanence of Capital Limited | Financial services | 2026 |
| Perth House Residents' Association Limited | Households | 1974 |
| Perth Property Limited | Real estate | 2014 |
| Pet Pantry Winchester Ltd | Administrative & support | 2000 |
| Peter Crosswell Agricultural Ltd | Agriculture & fishing | 1999 |
| Peter Larkum Limited | Education | 2019 |
| Peter White Consultancy Services Limited | Professional & scientific | 2020 |
| Petita Demas Limited | Information & communication | 2014 |
| Petra Developments Limited | Construction | 2000 |
| Pets & Care Ltd | Wholesale & retail | 2023 |
| PFT Academy Ltd | Arts & recreation | 2023 |
| PG Project Services Limited | Professional & scientific | 2021 |
| PGA Property Services Limited | Administrative & support | 2026 |
| Pharmacy on Demand Ltd | Wholesale & retail | 2025 |
| Pharmagraph Ltd | Information & communication | 2001 |
| Phase H Limited | Financial services | 2022 |
| Phelan Projects Limited | Construction | 2024 |
| Phillips Schroeder Surety Limited | Financial services | 2018 |
| Phodography Ltd | Arts & recreation | 2015 |
| Phoenix 10 Limited | Information & communication | 2016 |
| Phoenix Air Control Ltd | Manufacturing | 2026 |
| Phoenix Air Handling Ltd | Manufacturing | 2024 |
| Phoenix Air Holdings Ltd | Financial services | 2026 |
| Phoenix Credit Limited | Wholesale & retail | 2007 |
| Phoenix PD Limited | Construction | 2022 |
| Phoenix Spencer Sandbanks Limited | Real estate | 2011 |
| Photon Financial Services Limited | Information & communication | 2021 |
| Physio Centre Limited | Health & social care | 2006 |
| Physiotherapy and Wellness Alresford Ltd | Health & social care | 2020 |
| Physiotherapy and Wellness Ltd | Health & social care | 2013 |
| Physiotherapy and Wellness Twyford Ltd | Health & social care | 2024 |
| Physiotherapy Inc Limited | Health & social care | 2009 |
| Piccadilly Collections Ltd | Information & communication | 2018 |
| Picnic Social Ltd | Information & communication | 2019 |
| Picture City Ltd | Professional & scientific | 2020 |
| Piece of Cake Accounting Ltd | Professional & scientific | 2021 |
| Pier View Apartments (Bognor Regis) Limited | Households | 2023 |
| Pike Square Limited | Professional & scientific | 2023 |
| Pineson Properties Ltd | Real estate | 2025 |
| Pinnacle Home Improvements Ltd | Construction | 2024 |
| Pinnacle Land Profits Ltd | Real estate | 2025 |
| Pinx Limited | Professional & scientific | 2011 |
| Pinzon Services Limited | Professional & scientific | 2025 |
| PIPE2020 Limited | Information & communication | 2013 |
| Piper Keen Ltd | Construction | 2025 |
| Piper Strategy Ltd | Professional & scientific | 2021 |
| Pipers Gardens Management Company Limited | Households | 2011 |
| Pippa Evans Limited | Administrative & support | 2014 |
| Pitt Lane (Jaguar) Limited | Wholesale & retail | 2023 |
| Pitt Lane Limited | Wholesale & retail | 2009 |
| Pitt Vale Property Limited | Real estate | 2003 |
| Pittleworth Developments Limited | Construction | 2015 |
| Pittsford Advisory Limited | Professional & scientific | 2015 |
| Pixel and INK London Ltd | Professional & scientific | 2018 |
| Pizza PAN Winchester Ltd | Hospitality | 2020 |
| Pizza Polizia Limited | Hospitality | 2022 |
| PJ Askew & Co Ltd | Wholesale & retail | 2024 |
| PKG Building Projects Ltd | Construction | 2019 |
| Place Logic Limited | Professional & scientific | 1988 |
| Plandesk Limited | Information & communication | 2013 |
| Plane Arboriculture Limited | Professional & scientific | 2015 |
| Planet Plus Ltd. | Administrative & support | 2008 |
| Planit Flooring Limited | Information & communication | 2026 |
| Planning Concepts and Solutions Limited | Professional & scientific | 2008 |
| Planning Property Land Profits Ltd | Real estate | 2025 |
| Platform 4 | Arts & recreation | 2006 |
| Platt Reynolds Ltd | Real estate | 2020 |
| Play to the Crowd | Arts & recreation | 1999 |
| Plmd Consult Ltd | Professional & scientific | 2023 |
| Plot C Limited | Administrative & support | 2021 |
| Plough Steep Limited | Extraterritorial | 1981 |
| Plumbsphere Limited | Wholesale & retail | 2024 |