| Pcnbs Ltd | Information & communication | 2015 |
| PDA (Essex) Ltd | Wholesale & retail | 2019 |
| PE Connections Ltd | Wholesale & retail | 2020 |
| Peacock Cars Ltd | Transport & logistics | 2020 |
| Peacock School Transfers Ltd | Transport & logistics | 2023 |
| Peak Energy Solutions Ltd | Wholesale & retail | 2015 |
| Pearcey Properties Limited | Real estate | 2023 |
| Pebmarsh Propagation Limited | Agriculture & fishing | 2009 |
| Pectus Care Recruitment Ltd | Administrative & support | 2021 |
| Peglen Limited | Wholesale & retail | 2018 |
| PEN 15 Design Ltd | Professional & scientific | 2016 |
| Penkivel Trading Limited | Professional & scientific | 2015 |
| Pennick's Plumbing Limited | Construction | 2011 |
| People Guru International Ltd | Professional & scientific | 2023 |
| Peoplescenelink Limited | Administrative & support | 2015 |
| Perfectly Unique Services Ltd | Administrative & support | 2023 |
| Peritus Property Limited | Real estate | 2009 |
| Personalise by Design Limited | Other services | 2021 |
| Petches Farm Ltd | Agriculture & fishing | 2013 |
| Peter Evans Photography Limited | Professional & scientific | 2007 |
| Peter Faulkner Enterprises Limited | Health & social care | 2003 |
| Peter Martin Property Ltd. | Real estate | 2001 |
| PEZ London Ltd | Wholesale & retail | 2021 |
| PFI Sprinkler Installations Limited | Construction | 2013 |
| PFS Design Limited | Professional & scientific | 2005 |
| PG Rail Consultancy Ltd | Professional & scientific | 2023 |
| PGC Marine Ltd | Transport & logistics | 2018 |
| Pharmechceutics Ltd | Professional & scientific | 2019 |
| Phase 2 (Avenue West) Limited | Financial services | 2016 |
| Phase 2 Planning & Development Limited | Professional & scientific | 2011 |
| Phil Bibby Partnership Limited | Wholesale & retail | 2010 |
| Philip Stacey Contracts Limited | Construction | 1974 |
| Phillips Roofing & Cladding Limited | Construction | 2019 |
| Phoenix Hospitality (Essex) Ltd | Hospitality | 2025 |
| Phonics With Robot REG Franchising Ltd | Education | 2016 |
| PICK2PACK Ltd | Administrative & support | 2011 |
| Pickmeeuk Limited | Transport & logistics | 2024 |
| Pickton Sign Services Ltd | Manufacturing | 2022 |
| Pink Noise Productions Limited | Administrative & support | 1998 |
| Pink Pineapple Essex Limited | Wholesale & retail | 2021 |
| Pinnacle Electrical Ltd | Construction | 2015 |
| Pipirhi Limited | Real estate | 2021 |
| Piri & Tommy Live Ltd | Arts & recreation | 2022 |
| Piri Music Limited | Arts & recreation | 2021 |
| Pixa Accountancy Ltd | Professional & scientific | 2017 |
| Pixels for Good UK Ltd | Information & communication | 2024 |
| Pjad Limited | Administrative & support | 2005 |
| PJC Displays Limited | Other services | 1999 |
| PJL Bolton Ltd | Construction | 2017 |
| Pjmellor Limited | Administrative & support | 2025 |
| PJR Mechanical Pipe Services Ltd | Construction | 2024 |
| Pjsm (Roxwell) Limited | Professional & scientific | 2013 |
| PJW Decorating Ltd | Construction | 2022 |
| PK Interior Service Ltd | Construction | 2020 |
| Plan 2 Develop Ltd | Construction | 2025 |
| Plant Holdings Limited | Administrative & support | 2025 |
| Plastic Crayons Limited | Professional & scientific | 2013 |
| Plateau Consulting Ltd | Information & communication | 2012 |
| Platform Agency London Ltd | Professional & scientific | 2020 |
| Platinum Glazing Ltd | Construction | 2019 |
| Players Detailing Ltd | Extraterritorial | 2017 |
| Plcn Limited | Real estate | 2017 |
| Plume Homes Limited | Construction | 2021 |
| Plume Investments Limited | Real estate | 2023 |
| PMP Plumbing Ltd | Construction | 2025 |
| PNS Associates Ltd | Education | 2016 |
| PNS12A Ltd | Other services | 2024 |
| PO Builders Ltd | Construction | 2020 |
| Podman Podiatry Ltd | Health & social care | 2026 |
| Pokabball Cards Limited | Wholesale & retail | 2025 |
| Pole and Hook Ltd | Wholesale & retail | 2024 |
| Poltoner-Associates Ltd | Professional & scientific | 2022 |
| Polycroo Ltd | Construction | 2021 |
| Polyglamorous Ltd | Arts & recreation | 2022 |
| Poolwise Ltd | Construction | 2025 |
| Popcorn Community Limited | Health & social care | 2023 |
| Popup Broadband Limited | Information & communication | 2025 |
| Porsche Classics GB Limited | Extraterritorial | 2014 |
| Porsche Classics Limited | Wholesale & retail | 2006 |
| Porter Couriers Limited | Transport & logistics | 2023 |
| Porteramm Ltd | Construction | 2017 |
| Portrait Appointments Limited | Administrative & support | 2019 |
| Potterwoods Furniture Ltd | Manufacturing | 2021 |
| Poulter Creative Ltd | Professional & scientific | 2011 |
| Powderloop Technology Limited | Manufacturing | 2022 |
| Power House Pictures Limited | Arts & recreation | 1988 |
| Power Logic (Europe) Limited | Extraterritorial | 1994 |
| Power Logic U.K. Limited | Manufacturing | 1994 |
| Powers Leisure Limited | Hospitality | 2020 |
| PP Automation Ltd. | Manufacturing | 2018 |
| PQL HR Consulting Ltd | Professional & scientific | 2023 |
| Pragmatic 365 Ltd | Information & communication | 2020 |
| Pragmatic Enterprise Consulting Limited | Professional & scientific | 2010 |
| PRB Consultancy Limited | Professional & scientific | 2022 |
| Precision Aerospace Component Engineering Limited | Manufacturing | 1987 |
| Precision Aerospace Fasteners Limited | Manufacturing | 1998 |
| Precision Commissioning Limited | Construction | 2007 |
| Precixion Ltd. | Health & social care | 2023 |
| Preece and Preece Investments Ltd | Financial services | 2024 |
| Preece Morgan Group Limited | Financial services | 2019 |