| Pink Feet Limited | Professional & scientific | 2000 |
| Pinks Events Limited | | 1987 |
| Pinnacle Asset Corporation Limited | Professional & scientific | 2016 |
| Pinnacler PVT Ltd | Manufacturing | 2024 |
| Pinpoint Diagnostics Ltd | Wholesale & retail | 2026 |
| Piolet Financial Insights Limited | Professional & scientific | 2024 |
| Pioneer Catering Limited | Hospitality | 2020 |
| Pisces Media Limited | Information & communication | 2008 |
| PIT Stop Brand Consultancy Limited | Professional & scientific | 2018 |
| Pitchside First AID Ltd | Education | 2025 |
| Pizzaiola Limited | Hospitality | 2020 |
| PK Aviation Ltd | Transport & logistics | 2014 |
| PK Mental Health Consultancy Ltd | Professional & scientific | 2025 |
| Pkashu Ltd | Information & communication | 2011 |
| Place Lane Properties Ltd | Hospitality | 2017 |
| Places Architects Ltd | Administrative & support | 2019 |
| Plain Speaking Financial Planning Ltd | Financial services | 2014 |
| Plance Ltd | Wholesale & retail | 2025 |
| Planet Glass Solutions Limited | Hospitality | 2003 |
| Planline Projects Limited | Information & communication | 2015 |
| Plantagenet Basements Limited | Administrative & support | 2018 |
| Plantagenet Construction Limited | Administrative & support | 2018 |
| Plantinlab Ltd | Agriculture & fishing | 2023 |
| Plas'Tech Tooling & Moulding Limited | Manufacturing | 2001 |
| Plasteco 3D Ltd | Wholesale & retail | 2015 |
| Plastic Letters and Signs Limited | Manufacturing | 1972 |
| Platinum Exec Group Ltd | Information & communication | 2017 |
| Platinum Training Solutions Limited | Education | 2023 |
| Platinumsuk Ltd | Information & communication | 2023 |
| Play IT by EAR Ltd | Information & communication | 2012 |
| Playjam Holdings Limited | Professional & scientific | 2011 |
| Playjam Ltd | Information & communication | 1997 |
| Playon London Ltd | Wholesale & retail | 2020 |
| Playworks Digital Ltd | Information & communication | 2016 |
| Pldel Limited | Construction | 2010 |
| Plug in Solar Ltd | Energy | 2011 |
| Plum Garden Designs Limited | Administrative & support | 2015 |
| Pluris Developments Limited | Real estate | 2007 |
| PMC Floors Ltd | Construction | 2022 |
| PMD Promotions Limited | Professional & scientific | 2025 |
| PNC Financial Services UK Ltd | Financial services | 2010 |
| Pole to Pole Communications Limited | Professional & scientific | 1998 |
| Pomellato (UK) Limited | Wholesale & retail | 2010 |
| Pommes D'Or Family Office Limited | Wholesale & retail | 2014 |
| Ponmala Ltd | Health & social care | 2015 |
| POP and Pour Pubs Ltd | Hospitality | 2023 |
| Pople Associates Limited | Construction | 2011 |
| Portal Group Holdings Limited | Financial services | 2026 |
| Portslade Designs Limited | Extraterritorial | 2004 |
| Portsmouth Property Limited | Real estate | 2016 |
| Positive Alliance Ltd | Professional & scientific | 1998 |
| Posture by Studio M Ltd | Other services | 2008 |
| Potential Personal Training Limited | Other services | 2012 |
| Powello UK Limited | Transport & logistics | 2008 |
| Poynings Property Limited | Hospitality | 2015 |
| Ppss Support Services Ltd | Professional & scientific | 2020 |
| PR Builders Sussex Ltd | Construction | 2018 |
| Pr-Hr Solutions Limited | Administrative & support | 2011 |
| PRA Technologies Limited | Professional & scientific | 2022 |
| Practical Angel Ltd | Administrative & support | 2022 |
| Practys Systems Limited | Information & communication | 1990 |
| Precision Global Limited | Information & communication | 2011 |
| Predexyo UK Ltd | Information & communication | 2023 |
| Premium Coffee Solutions Ltd | Manufacturing | 2019 |
| Prenplants Sussex Limited | Agriculture & fishing | 2014 |
| Preori Consulting Limited | Information & communication | 2004 |
| Preori Limited | Information & communication | 2001 |
| Preori Software Limited | Information & communication | 2004 |
| Prestie Clean Ltd | Administrative & support | 2026 |
| Prestige Security Ltd | Administrative & support | 2021 |
| Pride Plumbing Limited | Construction | 2020 |
| Primary Care Cardiovascular Society (Pccs) CIC | Health & social care | 2014 |
| Prime Property (Sussex) Limited | Households | 2024 |
| Primex Tyres UK Ltd | Wholesale & retail | 2019 |
| Print Island Media Ltd | Information & communication | 2025 |
| Prism Strategy & Management Limited | Professional & scientific | 2004 |
| Prism Thinking Media Limited | Information & communication | 2016 |
| Pritchard-Gordon Tankers Limited | Transport & logistics | 1992 |
| Pro GEO Survey Ltd | Wholesale & retail | 2017 |
| Pro Seal Services Limited | Construction | 2017 |
| Proaudium Limited | Professional & scientific | 2009 |
| Produce Plus Ltd | Wholesale & retail | 2002 |
| Production Link International Limited | Professional & scientific | 2019 |
| Professional Landlord Hub UK Limited | Professional & scientific | 2023 |
| Program and Product Solutions Limited | Information & communication | 2007 |
| Project LDN Limited | Wholesale & retail | 2018 |
| Project Olive Lindfield Limited | Wholesale & retail | 2017 |
| Project Sixty One Ltd | Construction | 2021 |
| Projectrise Football Ltd | Education | 2026 |
| Promotionem Limited | Information & communication | 2017 |
| Prosper Safety Ltd | Administrative & support | 2021 |
| Prossimo Livello Ltd | Information & communication | 2025 |
| Prostore Furniture Ltd | Wholesale & retail | 2026 |
| Protea Pilates Limited | Health & social care | 2020 |
| Protot Sports Ltd. | Arts & recreation | 2016 |
| Prsense Ltd | Professional & scientific | 2024 |
| PRT Systems Limited | Information & communication | 2000 |
| Pruners Limited | Other services | 2017 |
| PS Carpentry Services Ltd | Construction | 2024 |
| PS Sound Limited | Manufacturing | 2016 |