| POD Almighty Ltd | Construction | 2018 |
| Pokieclick Limited | Wholesale & retail | 2020 |
| Polaris Property Maintenance Ltd | Construction | 2023 |
| Polished Perfection Hair and Beauty Ltd | Other services | 2022 |
| Pompey Taxi Ltd | Transport & logistics | 2026 |
| Poolbar Group Limited | Wholesale & retail | 2025 |
| Poole Windsurfing Limited | Education | 2019 |
| Popham Airfield Cafe Ltd | Hospitality | 2020 |
| Popina Group Ltd | Hospitality | 2025 |
| Popina Shop Ltd | Wholesale & retail | 2017 |
| Popina Trade Ltd | Hospitality | 2021 |
| Poplar Consultants Limited | Professional & scientific | 2004 |
| Poppin Plumbing & Heating Limited | Construction | 2022 |
| Poppins Pre-School and Nursery Limited | Education | 2018 |
| Poppyharp Ltd | Information & communication | 2024 |
| Poppyjade Limited | Financial services | 2020 |
| Port Synthetic Group Limited | Financial services | 2022 |
| Port Synthetic Limited | Manufacturing | 2019 |
| Portable Zone UK Ltd | Wholesale & retail | 2023 |
| Portly PIG Productions Limited | Information & communication | 2005 |
| Portsdown Pumas Ltd | Arts & recreation | 2024 |
| Portsdown Woodlands Management Ltd | Construction | 2015 |
| Portsmouth Anaesthetic Group LLP | | 2013 |
| Portsmouth Building Specialists Limited | Construction | 2019 |
| Portsmouth Carpentry and Joinery Ltd | Construction | 2017 |
| Portsmouth Carpentry Limited | Construction | 2005 |
| Portsmouth Commercial Bakery Limited | Manufacturing | 2012 |
| Portsmouth Construction Services Limited | Construction | 2017 |
| Portsmouth Cornerstone Limited | Other services | 1879 |
| Portsmouth Darts Limited | Arts & recreation | 2025 |
| Portsmouth Decor Ltd | Construction | 2025 |
| Portsmouth Golf Centre Limited | Arts & recreation | 2002 |
| Portsmouth Plumbing Supplies Limited | Wholesale & retail | 1989 |
| Portsmouth Property and Lettings Limited | Real estate | 2022 |
| Portsmouth Roofing and Construction Ltd. | Construction | 2022 |
| Portsmouth School of Wrestling Limited | Administrative & support | 2014 |
| Portsmouth Sky Pods Ltd | Construction | 2020 |
| Portsmouth Urology Limited | Health & social care | 2017 |
| Portsmouth.Com Removals Limited | Transport & logistics | 2012 |
| Portsmouthbathroomspecialists Limited | Construction | 2014 |
| Poshbagsuk Ltd | Wholesale & retail | 2019 |
| Positive Life Change Limited | Health & social care | 2014 |
| Positive Organisations & People Limited | Information & communication | 2016 |
| Positivid Identity Systems Limited | Information & communication | 2003 |
| Post to Post Fencing & Landscaping Ltd | Administrative & support | 2022 |
| Postern Road Limited | Real estate | 2025 |
| Postscript Services Limited | Transport & logistics | 2016 |
| Power Above Solar Services Limited | Construction | 2025 |
| Power Plan Services Ltd | Professional & scientific | 2017 |
| Power Training Services Ltd | Education | 2025 |
| Powerdrive Diesel Fuel Injection Specialists Limited | Wholesale & retail | 1990 |
| Powerdrive Governor Services Limited | Wholesale & retail | 2020 |
| Powertrac 3 Ltd | Professional & scientific | 2022 |
| Powis Street Enterprises Holdings Limited | Financial services | 2018 |
| Powis Street Enterprises Limited | Professional & scientific | 2005 |
| PP Nominee Holding Company Limited | Financial services | 2017 |
| PPC Works Limited | Information & communication | 2019 |
| Ppcgrowth Ltd | Professional & scientific | 2022 |
| PPT Precision Holdings Limited | Financial services | 2020 |
| Pramukh Ltd | Wholesale & retail | 2018 |
| PRC Groundworks Limited | Construction | 2016 |
| Precise GAS Products Ltd | Wholesale & retail | 2009 |
| Precise Intelligence Limited | Information & communication | 2002 |
| Precision Dietetics Ltd | Health & social care | 2024 |
| Precision Fibre Builds Ltd | Construction | 2023 |
| Precision Food Safety Solutions Ltd | Administrative & support | 2026 |
| Precision Nutrition and Dietetics Ltd | Health & social care | 2025 |
| Precision Oncology Limited | Health & social care | 2023 |
| Precision Pave Masters Ltd | Construction | 2024 |
| Preco Limited | Real estate | 1988 |
| Preda Trans Ltd. | Transport & logistics | 2017 |
| Prem Group Services Ltd | Financial services | 2019 |
| Premair Services Ltd | Professional & scientific | 2026 |
| Premelec Limited | Construction | 2022 |
| Premfit Ltd | Construction | 2019 |
| Premier Boat Services Limited | Extraterritorial | 2008 |
| Premier Boat Valeting Limited | Manufacturing | 2020 |
| Premier Precision Tooling Limited | Manufacturing | 1996 |
| Premier Professional Window Cleaning Services Limited | Administrative & support | 2018 |
| Premier Properties Hampshire Limited | Real estate | 2019 |
| Premier Scaffolding Group Ltd | Construction | 2024 |
| Premier Solution Group Ltd | Wholesale & retail | 2025 |
| Premierseal Limited | Construction | 2012 |
| Premio Retail Limited | Wholesale & retail | 2020 |
| Premium Technologies Private Limited | Information & communication | 2018 |
| Premsafe (South) Limited | Construction | 2019 |
| Premsurv Limited | Construction | 2019 |
| PREPARED4AIR Ltd | Administrative & support | 2021 |
| Presley Court Management Limited | Real estate | 2017 |
| Prestige Car Service (PCS) Limited | Manufacturing | 2007 |
| Prestige Coastal Retreats Ltd | Hospitality | 2023 |
| Prestige Drylining Services Ltd | Construction | 2022 |
| Prestige Property & Land Limited | Real estate | 2018 |
| Prestige Property Hampshire Limited | Real estate | 2018 |
| Prestige Tiling Company Ltd | Construction | 2022 |
| Prestigious Lust Limited | Arts & recreation | 2025 |
| Prestwick Advisors Limited | Professional & scientific | 2025 |
| Pretty Green Property Services Ltd | Construction | 2023 |
| PRG Building Services Limited | Administrative & support | 2016 |
| Price Cooling Services Limited | Construction | 2009 |