| Paul Marjoram Limited | Construction | 2007 |
| Paul's Fish Box Limited | Wholesale & retail | 2014 |
| Pawsey Properties Limited | Real estate | 2024 |
| PBB CAD Services Ltd | Professional & scientific | 2022 |
| PCF Engineering Services Ltd | Professional & scientific | 2017 |
| PCT Care Services Limited | Health & social care | 2010 |
| PCT Carpentry Ltd | Manufacturing | 2019 |
| PCT Childrens Services Ltd | Health & social care | 2022 |
| PCT Early Years Ltd | Health & social care | 2023 |
| PCT Education Services Ltd | Education | 2018 |
| PCW Process Limited | Mining & quarrying | 2015 |
| Peachy Exotic Watches Limited | Wholesale & retail | 2022 |
| Peacock Holdings (2015) Limited | Financial services | 2015 |
| Peak Open Water Sports Ltd | Wholesale & retail | 2026 |
| Peak Wealth Solutions Ltd | Financial services | 2019 |
| Pegasus Michael Limited | Professional & scientific | 2019 |
| Pelagic Support Ltd | Manufacturing | 2026 |
| PEN & Pencil Solutions Ltd | Information & communication | 2024 |
| Penelope Property Company Ltd | Real estate | 2018 |
| Pentland Energy Limited | Professional & scientific | 2024 |
| Peregrine Electrical Systems Ltd | Construction | 2025 |
| Petalicious Limited | Manufacturing | 2019 |
| Peter Piercy Limited | Other services | 2019 |
| Petkar Properties Limited | Real estate | 2008 |
| Petrally Services Limited | Mining & quarrying | 2014 |
| Pettifer Yacht Services Ltd. | Administrative & support | 1996 |
| Philip Holdsworth Limited | Construction | 2012 |
| Philip Millington Water Services Limited | Agriculture & fishing | 2010 |
| Philip Nunn Wealth Solutions Limited | Professional & scientific | 2018 |
| Philip Oliver Services Limited | Professional & scientific | 2009 |
| Philip SMY Fishing Limited | Agriculture & fishing | 2023 |
| Philpot Property Limited | Real estate | 2025 |
| Phoenix Auto Spares Exports Ltd | Extraterritorial | 2008 |
| Phoenix Books UK 01 Limited | Wholesale & retail | 2020 |
| Phoenix Property Management East Limited | Construction | 2018 |
| Phone GP Ltd | Wholesale & retail | 2020 |
| Phone Palace Limited | Wholesale & retail | 2021 |
| Phonely Limited | Information & communication | 2024 |
| Phpg Ltd | Construction | 2020 |
| Physalia Arts Ltd | Manufacturing | 2017 |
| Pich and Wood Ltd | Other services | 2018 |
| Pickitpackit Limited | Manufacturing | 1996 |
| Pickyouneed Limited | Wholesale & retail | 2023 |
| Picture Studios (EA) Limited | Professional & scientific | 2007 |
| Pillar Energy Consultants Limited | Professional & scientific | 2022 |
| Pillar Investments Limited | Professional & scientific | 2022 |
| Pinky's Ice Cream Ltd | Wholesale & retail | 2025 |
| Pinnacle Property Group (East Anglia) Ltd | Real estate | 2019 |
| Pipe Dream Utilities Ltd | Construction | 2025 |
| Pipers Professional Services Ltd | Administrative & support | 2011 |
| Piranha Joes Ltd | Hospitality | 2023 |
| Pitcher Construction Limited | Construction | 2025 |
| Pitkin & Ruddock (Bishop's Stortford) Ltd | Manufacturing | 1983 |
| Pitkin & Ruddock (Bury ST. Edmunds) Limited | Manufacturing | 2006 |
| Pitkin & Ruddock (Ipswich) Limited | Manufacturing | 2006 |
| Pitkin & Ruddock (Lowestoft) Limited | Manufacturing | 2006 |
| Pitkin & Ruddock Limited | Professional & scientific | 1959 |
| Pizza Kebab Time Ltd | Hospitality | 2025 |
| Pizza Point Limited | Hospitality | 2021 |
| Pizza Shop Lowestoft Ltd | Hospitality | 2026 |
| Pizza Time NR33 Ltd | Hospitality | 2026 |
| Pizzeys Autos Ltd | Wholesale & retail | 2024 |
| PJE Services (East Anglia) Limited | Administrative & support | 2020 |
| PJS Offshore Lowestoft Limited | Professional & scientific | 2016 |
| PK Turbine Services Ltd | Construction | 2026 |
| Pkrs Retail Limited | Wholesale & retail | 2018 |
| PKS Hire Limited | Administrative & support | 2021 |
| Pksolar Limited | Administrative & support | 2019 |
| Plastic Direct Limited | Wholesale & retail | 2010 |
| Platinum Properties EA Limited | Real estate | 2023 |
| Pleasurewood Hills Limited | Arts & recreation | 2000 |
| Plexing Wiring Limited | Manufacturing | 2019 |
| PMB Property Investors Ltd | Real estate | 2024 |
| PNP Property Limited | Real estate | 2019 |
| Pochard Ltd | Real estate | 2021 |
| Point East Darts Limited | Wholesale & retail | 2025 |
| Point Pedro Asset Holdings Limited | Health & social care | 2025 |
| Point Pedro Property Holdings Limited | Health & social care | 2015 |
| Pointsbox Limited | Other services | 2019 |
| Polaris Forge Ltd | Manufacturing | 2025 |
| Polart Ltd | Wholesale & retail | 2020 |
| Polly Vincent Cosmetic Clinic Ltd | Other services | 2025 |
| Poplar Road Limited | Households | 2018 |
| Poppyland Limited | Information & communication | 2017 |
| Porkys PIT Ltd | Hospitality | 2019 |
| Poseidon Process Services Limited | Mining & quarrying | 2022 |
| Poseidon Renewables Limited | Professional & scientific | 2017 |
| Posh Pigs Limited | Hospitality | 2002 |
| Posh Ridez Ltd | Transport & logistics | 2025 |
| Positive Metering Systems Ltd | Manufacturing | 2020 |
| Possafe UK Ltd | Wholesale & retail | 2024 |
| POT Black 147 Limited | Arts & recreation | 2010 |
| Poulson Offshore Limited | Administrative & support | 2012 |
| Poxton Roofing Limited | Construction | 2023 |
| PPS (Norwich) Limited | Manufacturing | 2016 |
| PR Lifting Services Ltd | Administrative & support | 2023 |
| Precious Jerk Ltd | Hospitality | 2026 |
| Precision Rigging & Lifting Limited | Mining & quarrying | 2011 |
| Premium Finance Limited | Financial services | 2013 |
| Priceless House of Events Ltd | Hospitality | 2023 |