| Pink Cactus Limited | Extraterritorial | 2020 |
| Pink Lotus Creative Ltd | Professional & scientific | 2023 |
| Pink Pilates Limited | Extraterritorial | 2025 |
| Pinkertons Newsagent Ltd | Wholesale & retail | 2022 |
| Pinks Vintage Limited | Hospitality | 2014 |
| Pinky Blush Ltd | Other services | 2022 |
| Pinnacle Financial Management Limited | Professional & scientific | 2020 |
| Pinnacle Leadership Academy Ltd | Wholesale & retail | 2017 |
| Pinnacle Play Ltd | Manufacturing | 2024 |
| Pinnacle Plumbing Solutions Ltd | Construction | 2016 |
| Pinnacle Plumbing Solutions Sussex Ltd | Construction | 2025 |
| Pipedream Scaffolding Ltd | Construction | 2023 |
| Piperwood Investments Ltd | Financial services | 2026 |
| Pisani Designs Limited | Arts & recreation | 2017 |
| Pitchukas Limited | Real estate | 2022 |
| Pivotal People Resourcing Solutions Ltd | Administrative & support | 2024 |
| Pixcode Limited | Wholesale & retail | 2017 |
| Pixel Designs Ltd | Information & communication | 2024 |
| Pixel Play Sussex Ltd | Arts & recreation | 2024 |
| Pixel Sharp Limited | Information & communication | 2023 |
| Pixel-B Creative Limited | Professional & scientific | 2018 |
| Pizzazz Productions Limited | Information & communication | 2006 |
| PJ Mining Limited | Mining & quarrying | 2016 |
| PJC Aviation Group Limited | Transport & logistics | 2013 |
| Pjiwan Health Care Ltd | Wholesale & retail | 2024 |
| PK Autosmart (Sussex) Limited | Wholesale & retail | 2026 |
| PK Autosmart Limited | Wholesale & retail | 2020 |
| Pkzk Ltd | Construction | 2024 |
| Plakias Developments Limited | Other services | 2019 |
| Plane Carpentry (Southern) Limited | Construction | 2014 |
| Planet G Design Limited | Professional & scientific | 2021 |
| Plantexa Ltd | Hospitality | 2012 |
| Plaster and Render Limited | Construction | 2025 |
| Platform IT Ltd | Information & communication | 2015 |
| Platinum Eco Services (EOT) Limited | Financial services | 2023 |
| Platinum Eco Services Group Ltd | Financial services | 2024 |
| Platinum Eco Services Ltd | Professional & scientific | 2018 |
| Platinum Fencing Ltd | Construction | 2023 |
| Platinum Personal Training Limited | Other services | 2016 |
| Play (Positive Learning Active Youth) Ltd | Education | 2017 |
| Playfulwork Limited | Professional & scientific | 2016 |
| Playpen Childcare Limited | Education | 2002 |
| Plenty Productions Community Interest Company | Information & communication | 2006 |
| Plexus Applied Technologies Limited | Manufacturing | 2015 |
| Plexus Holdings PLC | Professional & scientific | 1997 |
| PLS Squared Ltd | Wholesale & retail | 2022 |
| Plumbdigital Ltd | Professional & scientific | 2025 |
| Plumbguys Limited | Administrative & support | 2017 |
| Plutus Management Holding Ltd | Financial services | 2025 |
| Plymouth Consulting Ltd | Professional & scientific | 2024 |
| PM Security Systems Limited | Administrative & support | 2005 |
| PMD Steel Construction Ltd | Construction | 2018 |
| PMN Consultancy Limited | Other services | 2012 |
| PNE Holdings Limited | Real estate | 2018 |
| POD Two Limited | Information & communication | 2003 |
| Poekanoeks Limited | Health & social care | 2022 |
| Poets Corner (Worthing) Limited | Real estate | 2012 |
| Polarity Brewing Ltd | Manufacturing | 2016 |
| Polarkold Distribution Limited | Transport & logistics | 1995 |
| Polarkold Limited | Transport & logistics | 1993 |
| Polefreaks Ltd | Information & communication | 2022 |
| Poletec Cleaning Services Ltd | Administrative & support | 2018 |
| Police Children's Fund | Professional & scientific | 2013 |
| Politics and Pixels Ltd | Information & communication | 2022 |
| Polo Capital Ltd | Professional & scientific | 2025 |
| Polytunnelsrus Ltd | Other services | 2017 |
| PON Property & Investments Limited | Real estate | 1988 |
| Pondi Parker Ltd | Health & social care | 2021 |
| Poonsup Limited | Hospitality | 2023 |
| POP PAY Ltd | Administrative & support | 2021 |
| Porro Management Limited | Arts & recreation | 2025 |
| Port Partners (Customs Clearance) Limited | Transport & logistics | 2018 |
| Portals 365 Ltd | Information & communication | 2008 |
| Portbow Consulting Ltd | Information & communication | 2016 |
| Porthcothan Limited | Households | 1995 |
| Portixol Investments | Financial services | 2025 |
| Portland First LLP | | 2012 |
| Portland Freehouse Company Ltd | Hospitality | 2014 |
| Portman Talent Limited | Administrative & support | 2016 |
| Portsmouth Chopstix Limited | Hospitality | 2023 |
| POS Property Maintenance Limited | Real estate | 2024 |
| Posh Shock Limited | Extraterritorial | 2014 |
| Positive Care Ltd | Health & social care | 2012 |
| Possible Scenario Limited | Professional & scientific | 2016 |
| Postcode Films Ltd | Information & communication | 2014 |
| Pound Street Limited | Professional & scientific | 2000 |
| Pountney Parker Ltd | Wholesale & retail | 2004 |
| Pountney Parker Properties Limited | Real estate | 2024 |
| Pountney Tyres Ltd | Wholesale & retail | 1999 |
| Powelec Limited | Construction | 2025 |
| Powell Jones(Stone Distributors)Limited | Wholesale & retail | 1959 |
| Powell Project Management Services Limited | Professional & scientific | 2015 |
| Powell's of Coolham Limited | Manufacturing | 1998 |
| Power in the Darkness Limited | Real estate | 2026 |
| Power Property Developments Limited | Real estate | 2018 |
| Power-Tech Solutions Sussex Ltd | Real estate | 2018 |
| Powerlink House Limited | Construction | 2001 |
| Powertrain Developments Limited | Professional & scientific | 2016 |
| PPL Design Ltd | Professional & scientific | 2020 |
| PR Car Sales Limited | Wholesale & retail | 2019 |