| PMB Quantity Surveyors & Claims Consultants Ltd | Professional & scientific | 2019 |
| Pmda Limited | Professional & scientific | 2017 |
| PMG Developers Ltd | Construction | 2018 |
| PMG Electrics Ltd | Construction | 2013 |
| PMG Investments Group Limited | Real estate | 2018 |
| Pndi Limited | Health & social care | 2024 |
| PNR Holdings Limited | Financial services | 2015 |
| PO Young Limited | Hospitality | 2002 |
| Po&Sons’ Ltd | Professional & scientific | 2022 |
| Pocket Square Projects Limited | Arts & recreation | 2016 |
| Podroll Limited | Real estate | 2024 |
| POL Driver Ltd | Transport & logistics | 2018 |
| Polar Instruments (Europe) Limited | Wholesale & retail | 1995 |
| Polaris Tech Ltd | Other services | 2015 |
| Polease the Costumiers Limited | Arts & recreation | 2015 |
| Polease Uniform Support Artists Limited | Administrative & support | 2020 |
| Polish ME Pretty Portsmouth Ltd | Other services | 2023 |
| Polser UK Limited | Manufacturing | 2020 |
| Polway Transport Ltd | Transport & logistics | 2025 |
| Polyfibre (UK) Limited | Financial services | 2025 |
| Polygon Dreams Ltd | Professional & scientific | 2025 |
| Polz Apart Limited | Arts & recreation | 2007 |
| Pomeroy Pubs Limited | Hospitality | 2023 |
| Pompette Productions Ltd | Professional & scientific | 2022 |
| Pompey Barbers Ltd | Other services | 2025 |
| Pompey Car Sales Limited | Wholesale & retail | 2016 |
| Pompey City F C Limited | Arts & recreation | 2018 |
| Pompey City Football Club Limited | Arts & recreation | 2018 |
| Pompey Darkroom CIC | Professional & scientific | 2023 |
| Pompey Darts Ltd | Wholesale & retail | 2024 |
| Pompey F C Limited | Arts & recreation | 2018 |
| Pompey Food Supplies Limited | Wholesale & retail | 2023 |
| Pompey Football Club Limited | Arts & recreation | 2018 |
| Pompey Foundation Trading Company Limited | Arts & recreation | 2009 |
| Pompey Garage and Tyre Service Ltd | Wholesale & retail | 2025 |
| Pompey Heritage Share Holdco Limited | Arts & recreation | 2017 |
| Pompey Homes Limited | Construction | 2013 |
| Pompey in the Community | Arts & recreation | 2008 |
| Pompey Lettings Limited | Real estate | 2015 |
| Pompey Masala Ltd | Hospitality | 2025 |
| Pompey Vape Ltd | Wholesale & retail | 2026 |
| POMPEYMARKET133 Ltd | Wholesale & retail | 2025 |
| Pompeysigns Limited | Professional & scientific | 2026 |
| Pooja’S Hair & Beauty Ltd | Other services | 2024 |
| Poplar Attractions Limited | Manufacturing | 2020 |
| Porac Limited | Real estate | 2024 |
| Port Forward Ltd | Information & communication | 2011 |
| Port of Call Media Limited | Information & communication | 2022 |
| Port Projects Limited | Professional & scientific | 2020 |
| Port Solent Car Centre Limited | Wholesale & retail | 2021 |
| Port Solent Dining Limited | Hospitality | 2026 |
| Port Solent Hand Car Wash Ltd | Wholesale & retail | 2026 |
| Port Solent Yacht Club Limited | Arts & recreation | 1991 |
| Port Value Ltd | Real estate | 2014 |
| PORT3D Ltd | Professional & scientific | 2023 |
| Portable Components Ltd | Wholesale & retail | 2012 |
| Portchester Carpentry Limited | Construction | 2015 |
| Portchester Park (Management) Company Limited | Real estate | 1990 |
| Portchester Roofing Ltd | Construction | 2025 |
| Portchester Valet Car Wash Ltd | Administrative & support | 2025 |
| Portcuts Limited | Other services | 2023 |
| Porteast (1996) Limited | Extraterritorial | 1996 |
| Porteast Limited | Extraterritorial | 1964 |
| Porter Rose Limited | Professional & scientific | 2019 |
| Portfield Ltd | Real estate | 2017 |
| Portico Holdings Limited | Professional & scientific | 2024 |
| Portico Logistics Limited | Transport & logistics | 2024 |
| Portico Photographic Marketing Ltd. | Information & communication | 2013 |
| Portico Port Services Limited | Transport & logistics | 2024 |
| Portico Shipping Limited | Transport & logistics | 1986 |
| Portland Mews Residents Association Limited | Households | 1994 |
| Portmouth Property Ltd | Real estate | 2026 |
| Ports Fest Ltd | Arts & recreation | 2005 |
| Ports India Limited | Hospitality | 2026 |
| Ports Perin 24/7 Ltd | Wholesale & retail | 2025 |
| Ports Perin Ltd | Wholesale & retail | 2024 |
| Ports Properties Ltd | Real estate | 2018 |
| Ports Properties N P Ltd | Real estate | 2021 |
| Ports Savers Ltd | Wholesale & retail | 2017 |
| Portsea Action Group 99 Ltd | Other services | 2000 |
| Portsea Hvac Limited | Energy | 2024 |
| Portsea Island Eyecare Limited | Other services | 2017 |
| Portsea Island Ltd | Professional & scientific | 2013 |
| Portsmed Ltd | Health & social care | 2023 |
| Portsmouth & District Private Landlords Association | Other services | 2002 |
| Portsmouth & Southsea Futsal Club Ltd | Education | 2022 |
| Portsmouth 247 Limited | Arts & recreation | 2020 |
| Portsmouth Advanced Student Services (Pass) Ltd | Real estate | 2022 |
| Portsmouth and South East Hampshire Partnership Limited | Real estate | 1994 |
| Portsmouth Aqua Limited | Manufacturing | 2016 |
| Portsmouth Area Regeneration Trust | Financial services | 1999 |
| Portsmouth Association for the Blind | Professional & scientific | 2011 |
| Portsmouth Basketball C.I.C. | Arts & recreation | 2020 |
| Portsmouth Brewing Co Ltd | Hospitality | 2020 |
| Portsmouth Building Repairs Ltd | Construction | 2019 |
| Portsmouth Business Consultancy Limited | Professional & scientific | 2014 |
| Portsmouth Business Systems Limited | Information & communication | 2001 |
| Portsmouth Carpet Specialists Limited | Wholesale & retail | 2012 |
| Portsmouth Cathedral Enterprises Limited | Hospitality | 2026 |
| Portsmouth City F.C Limited | Arts & recreation | 2014 |