| Poppy Consult Limited | Professional & scientific | 2019 |
| Poppy Fields Watton Management Company Limited | Households | 2019 |
| Poppy ST George Management Ltd | Households | 2024 |
| Porabion Limited | Real estate | 2016 |
| Porchdean Limited | Households | 1978 |
| Port and Offshore Services Ltd | Transport & logistics | 2023 |
| Port Side Solutions (Logistics) Limited | Transport & logistics | 2021 |
| Port Side Solutions Ltd | Administrative & support | 2014 |
| Portal Power (Eastern) Limited | Construction | 2013 |
| Portal Power Building Components Limited | Wholesale & retail | 2024 |
| Portal Power Contractors Limited | Construction | 2024 |
| Portal Precinct Investment Limited | Construction | 2018 |
| Portcare International Limited | Administrative & support | 1994 |
| Porterhouse Building and Fire Solutions Limited | Construction | 2005 |
| Porterhouse Holdings and Rentals Limited | Real estate | 2022 |
| Porterhouse Legal Surveying & Consultancy Services Limited | Professional & scientific | 2011 |
| Portia Auto Trader Ltd | Wholesale & retail | 2017 |
| Portia Autos Limited | Wholesale & retail | 2024 |
| Portland Employment Limited | Transport & logistics | 2015 |
| Portman Property Holdings Limited | Real estate | 2019 |
| Portree Asset Management Ltd | Real estate | 2021 |
| Ports Personnel Ltd | Administrative & support | 2019 |
| Portuguese Coffee Limited | Hospitality | 2018 |
| Portway Yachting Worldwide Ltd | Other services | 2017 |
| Posh Advertisement Ltd | Information & communication | 2022 |
| Positive Property Finance Ltd | Financial services | 2013 |
| Post Agency Ltd | Professional & scientific | 2026 |
| Potion Brewing Company Ltd | Manufacturing | 2025 |
| Potstore Ltd | Administrative & support | 2015 |
| Potter & White Talent Limited | Administrative & support | 2025 |
| Potters Welding Limited | Manufacturing | 2010 |
| Pottery Events Ltd | Education | 2026 |
| Poucher Flex Ltd | Wholesale & retail | 2021 |
| Poulsen Selleck Limited | Professional & scientific | 2013 |
| Pound Gates and Company Limited | Financial services | 1995 |
| Pound Gates Vehicle Management Services Limited | Financial services | 1988 |
| Poundfield Innovations Limited | Administrative & support | 2010 |
| Poundfield Precast Limited | Manufacturing | 1992 |
| Poundfield Products (Group) Limited | Financial services | 2014 |
| Poundfield Products (Holdings) Limited | Financial services | 2013 |
| Pour & Press Ltd | Hospitality | 2025 |
| Power JET Mobile Wash Ltd | Administrative & support | 2025 |
| Powerbridge Technical Services Ltd | Manufacturing | 2024 |
| Powerflow Ipswich Limited | Wholesale & retail | 2025 |
| Powerhouse Software Limited | Information & communication | 2023 |
| Powerplay Projects Ltd | Information & communication | 2018 |
| Powerserve Systems Limited | Information & communication | 1997 |
| PP Garden Services Ltd | Administrative & support | 2022 |
| PP Worldwide Ltd | Information & communication | 2023 |
| PPB Training Ltd | Arts & recreation | 2026 |
| Ppsa FH Limited | Construction | 2023 |
| Ppsa LH Ltd | Real estate | 2023 |
| Prabtik Property Ltd | Real estate | 2024 |
| Pragmatic Claims and Risk Services Ltd | Other services | 2017 |
| Prague Trains Limited | Administrative & support | 2011 |
| Pratt Naval Architecture Limited | Professional & scientific | 2010 |
| Pravya Pharma Ltd | Health & social care | 2026 |
| Praxis M Cobbold Limited | Health & social care | 2009 |
| PRAXIS42 Holdings Limited | Financial services | 2023 |
| PRAXIS42 Services Limited | Extraterritorial | 2017 |
| PRB Enterprise Ltd | Wholesale & retail | 2022 |
| Pre-Pour Reinforcements Limited | Wholesale & retail | 2024 |
| Pre-Pour Services Limited | Extraterritorial | 2024 |
| Pre-Serve (UK) Limited | Other services | 2002 |
| Precinct Investment Limited | Real estate | 2019 |
| Precious Paws (Suffolk) Ltd | Agriculture & fishing | 2024 |
| Precision AI Limited | Administrative & support | 2025 |
| Precision Database Marketing Limited | Information & communication | 1995 |
| Precision Direct Marketing Limited | Extraterritorial | 2011 |
| Precision Health Europe Limited | Administrative & support | 2025 |
| Precision Healthcare Limited | Wholesale & retail | 2001 |
| Precision Healthtech Ltd | Information & communication | 2017 |
| Precision Landscapes DBT Limited | Administrative & support | 2026 |
| Precision Marketing Group Holdings Ltd | Financial services | 2022 |
| Precision Marketing Group Ltd | Administrative & support | 2004 |
| Precision MG Limited | Professional & scientific | 2017 |
| Precision Pharmacy Limited | Wholesale & retail | 2022 |
| Precon Holdings Limited | Financial services | 2024 |
| Precon Products Ltd | Wholesale & retail | 2007 |
| Premier Construction Services (Developments) Limited | Real estate | 2007 |
| Premier Construction Services (Ipswich) Limited | Construction | 1999 |
| Premier Electrical (Ipswich) Limited | Construction | 2009 |
| Premier Music Room Ltd | Arts & recreation | 2025 |
| Premier Pool Club Limited | Hospitality | 2016 |
| Premier Pool Ipswich Limited | Administrative & support | 2016 |
| Premier Repro and Print Limited | Manufacturing | 2016 |
| Premier Service Installations Limited | Construction | 1996 |
| Premier Services GB Limited | Professional & scientific | 2006 |
| Premier Taxis Ltd | Transport & logistics | 2026 |
| Premier Vehicle Services Ipswich Ltd | Wholesale & retail | 2011 |
| Premium Cabs Limited | Transport & logistics | 2024 |
| Premium Fencing & Landscapes Ltd | Administrative & support | 2021 |
| Premium Plates Ltd | Wholesale & retail | 2025 |
| Prentice Automotive Ltd | Wholesale & retail | 2026 |
| Press Play London Limited | Professional & scientific | 2023 |
| Pressure Equipment UK Limited | Manufacturing | 2016 |
| Prestige Car Repairs Limited | Wholesale & retail | 2003 |
| Prestige Discounts Ltd | Wholesale & retail | 2024 |
| Prestige Manuals Limited | Professional & scientific | 2018 |
| Prestige Motor Group Ltd | Other services | 2022 |