| Peneli Oliver Limited | Professional & scientific | 2010 |
| Perfect Screen Print Limited | Manufacturing | 1999 |
| Permanent Success Limited | Professional & scientific | 2004 |
| Perspective Accounting Limited | Professional & scientific | 2012 |
| Pet News Ltd | Information & communication | 2025 |
| Peter Oliver Homes (Crowborough) Limited | Administrative & support | 2022 |
| Peter Oliver Homes (Heathfield) Limited | Real estate | 2024 |
| Peter Oliver Homes Holdings Limited | Financial services | 2024 |
| Peter Oliver Homes Lettings Limited | Real estate | 2024 |
| Peter Oliver Homes Limited | Administrative & support | 2017 |
| Petra Logistics Ltd | Transport & logistics | 2016 |
| Pharmacy Initiative 2 Limited | Wholesale & retail | 2000 |
| Philip Harris Limited | Manufacturing | 2022 |
| Phillip Waters Motor Engineers Limited | Wholesale & retail | 1998 |
| Phoenix Health Hub Ltd | Health & social care | 2021 |
| Phoenix Panels Limited | Manufacturing | 2021 |
| PI Expert Limited | Financial services | 2011 |
| Pied Piper Pest Control Ltd | Administrative & support | 2011 |
| Pindo Management LLP | | 2017 |
| Pinetum Estates Limited | Households | 2017 |
| Ping Data Ltd | Information & communication | 2011 |
| Pinnacle Heating & Plumbing Ltd | Construction | 2012 |
| Pinnacle Property Partnership Ltd | Extraterritorial | 2022 |
| Pixel Perfect LED Technologies Ltd | Professional & scientific | 2023 |
| PJ Leisure Ltd | Hospitality | 2024 |
| Place Flight Limited | Professional & scientific | 1987 |
| Plan & Whirl Ltd | Professional & scientific | 2025 |
| Plane Characters Limited | Information & communication | 2013 |
| Plane Characters Productions Distribution Limited | Information & communication | 2021 |
| Plane Characters Productions Limited | Information & communication | 2020 |
| Plane Entertainment Ltd | Arts & recreation | 2020 |
| Planet Planit Ltd | Other services | 2008 |
| Platinum Fire Protection Ltd | Construction | 2023 |
| Play Therapy China Limited | Administrative & support | 2018 |
| Play Therapy England Limited | Other services | 2016 |
| Play Therapy Great Britain Limited | Other services | 2016 |
| Play Therapy India Limited | Administrative & support | 2018 |
| Play Therapy Press Limited | Administrative & support | 2003 |
| Play Therapy UK (2000) | Other services | 2000 |
| Ploughfield Farms Limited | Agriculture & fishing | 1972 |
| PN Group South East Ltd | Administrative & support | 2013 |
| Polymesh Fibres Limited | Administrative & support | 1977 |
| Porcelain Paving Accessories Ltd | Wholesale & retail | 2024 |
| Positive Story Limited | Professional & scientific | 2021 |
| Potential Personal Training Uckfield Limited | Other services | 2025 |
| Pots of Love (Uckfield) Ltd | Wholesale & retail | 2022 |
| Pouchlands (NO. 1) Management Company Limited | Administrative & support | 1994 |
| Power 10 Rowing Services Ltd | Education | 2018 |
| Power Belt Ltd | Wholesale & retail | 2019 |
| PP Property Management Ltd | Financial services | 2022 |
| PPF Works Ltd | Construction | 2024 |
| PR Imaging Limited | Professional & scientific | 2003 |
| Precision Kart Ltd | Wholesale & retail | 2024 |
| Predeem Innovation Ltd. | Other services | 2017 |
| Prestige Financial Associates Limited | Financial services | 1994 |
| Prestige Portfolio Limited | Professional & scientific | 2001 |
| Presto FOX Media Ltd | Information & communication | 2023 |
| Pretty Alluring Limited | Health & social care | 2017 |
| Primo Nutrition Ltd | Wholesale & retail | 2022 |
| Prince & Sons Tea Co. Limited | Wholesale & retail | 2013 |
| Prism SME Ltd | Information & communication | 2014 |
| Private Promo Ltd | Information & communication | 2015 |
| Pro BI Ltd | Information & communication | 2020 |
| Pro Clinic Limited | Health & social care | 2016 |
| Procervo Limited | Other services | 2021 |
| Production Equipment Sales Limited | Manufacturing | 1986 |
| Professional Indemnity Expert Limited | Financial services | 2011 |
| Professional Lift Trade Works Ltd. | Construction | 2008 |
| Professional Procurement & Contract Services Limited | Professional & scientific | 2008 |
| Profit Service Ltd | Professional & scientific | 2015 |
| Property Transaction Pack Ltd | Information & communication | 2025 |
| Property-Projekt Ltd. | Financial services | 2024 |
| PSA Software Development Limited | Information & communication | 2011 |
| Psych Health Ltd | Health & social care | 2008 |
| PT Consulting CAS Limited | Administrative & support | 2013 |
| PTM Publishers Limited | Information & communication | 1977 |
| Pure Finance Services Limited | Financial services | 2008 |
| Purple Asparagus Ltd | Hospitality | 2019 |
| QFN Limited | Other services | 2017 |
| QT Express Balkans Holding Ltd | Financial services | 2025 |
| QT Investment Holding Group Ltd. | Financial services | 2024 |
| QT Logistics Group Ltd | Transport & logistics | 2023 |
| QT Technologies Ltd | Financial services | 2024 |
| Qualcom Ltd | Wholesale & retail | 2013 |
| Quantum Nova Corporation Ltd. | Financial services | 2024 |
| Quarters the Hiphopera Limited | Information & communication | 2003 |
| Quitely Confident IT Talents Ltd | Information & communication | 2019 |
| Quiz ME Quick Limited | Administrative & support | 2017 |
| R & B Construction (Southern) Limited | Construction | 2002 |
| R & P Holdings Limited | Financial services | 1984 |
| R a M Williams Limited | Professional & scientific | 2008 |
| R J Aguirre Consulting Ltd | Information & communication | 2022 |
| R L Property Services Limited | Real estate | 2025 |
| R.G. Dixon & SON Limited | Real estate | 1947 |
| R.W.P Construction Ltd | Construction | 2024 |
| Radford Couriers Ltd | Transport & logistics | 2026 |
| Radford Deliveries Ltd | Transport & logistics | 2026 |
| Radiate Global Limited | Financial services | 2021 |
| Raised Foods LLP | | 2025 |
| Rams Automation Limited | Construction | 2021 |