| Pinpoint Accuracy Ltd | Professional & scientific | 2025 |
| Pipedown Plumbing Limited | Construction | 2005 |
| Pizza City and Grill House Ltd | Hospitality | 2022 |
| Pizza Slice Ltd | Hospitality | 2023 |
| PJB Reinstatements Limited | Construction | 2015 |
| PJB Surveyors Ltd | Administrative & support | 2020 |
| PJG Payroll Consulting Service Ltd | Other services | 2024 |
| PKB Smart Cleaning Ltd | Administrative & support | 2025 |
| Pklm (Essex) Ltd | Real estate | 2020 |
| PKN Healthcare Limited | Health & social care | 2024 |
| PL Fencing & Landscaping Ltd | Administrative & support | 2023 |
| Planb Media Ltd | Information & communication | 2018 |
| Planespoken Ltd | Administrative & support | 2017 |
| Planet Leasing Limited | Administrative & support | 2007 |
| Planet Pixies Limited | Hospitality | 2017 |
| Plant Planning Consultants Limited | Professional & scientific | 2025 |
| Plasmat Ltd | Wholesale & retail | 2017 |
| Plasmavintageuk Ltd | Wholesale & retail | 2024 |
| Plasmold Plastic Products Ltd | Professional & scientific | 2011 |
| Plasmold Precision Ltd | Professional & scientific | 2011 |
| Plasmold Precision Plastics Ltd | Professional & scientific | 2011 |
| Plasmold Precision Products Ltd | Professional & scientific | 2011 |
| Plasmold Products Ltd | Professional & scientific | 2011 |
| Plasttex Limited | Wholesale & retail | 2024 |
| Platform Theatre Arts CIC | Arts & recreation | 2022 |
| Platinum DB Services Ltd | Information & communication | 2015 |
| Platinum PT Services Ltd | Arts & recreation | 2018 |
| Platinum Wellness Group Limited | Arts & recreation | 2015 |
| Playfix Limited | Other services | 2017 |
| Playgadgets Ltd | Wholesale & retail | 2011 |
| Playscend Ltd | Administrative & support | 2026 |
| Plumb Emergency Response Ltd | Construction | 2025 |
| Plumpot Media Ltd | Information & communication | 2024 |
| Pluswonder Limited | Real estate | 2017 |
| PM46 Ltd | Other services | 2026 |
| Poets Corner Food & Wine Ltd | Wholesale & retail | 2018 |
| Pogem Limited | Administrative & support | 2008 |
| Poké-On-Sea Ltd | Wholesale & retail | 2026 |
| Poli Technology Solutions Limited | Information & communication | 2012 |
| Polish School in Southend on Sea | Education | 2017 |
| Poorani Limited | Health & social care | 2021 |
| Popaganda Ltd | Wholesale & retail | 2025 |
| Poppadimes Limited | Hospitality | 2013 |
| Porter Planning Limited | Professional & scientific | 2015 |
| Porters Place Southend-On-Sea LLP | | 2019 |
| Potencia Motorcycles Limited | Wholesale & retail | 2024 |
| Potters Field (Ringmer) Management Company Limited | Households | 2019 |
| Potters Wynd (Durham) Management Company Limited | Households | 2013 |
| Poulloura Services Limited | Construction | 2026 |
| Powguard Limited | Health & social care | 2023 |
| Powtech Limited | Health & social care | 2023 |
| PPAVILION44 Limited | Wholesale & retail | 2024 |
| Ppl/Ir Europe | Other services | 2002 |
| Practical Bookkeeping Services Ltd | Professional & scientific | 2018 |
| Practical H.R. 2024 Limited | Financial services | 2024 |
| Practice Manage ME Limited | Administrative & support | 2025 |
| Praevisio Limited | Education | 2024 |
| Prana House Ltd | Wholesale & retail | 2026 |
| Precious Consultants Limited | Administrative & support | 2014 |
| Preciouxlife Ltd | Wholesale & retail | 2026 |
| Precision Gym Services Limited | Arts & recreation | 2010 |
| Predator Boatyards Limited | Transport & logistics | 2024 |
| Predator Charters Marine Limited | Transport & logistics | 2010 |
| Prejitaa Ltd | Wholesale & retail | 2025 |
| Premier Design & Construction Limited | Construction | 2005 |
| Premier Fire and Security Systems Ltd | Extraterritorial | 2012 |
| Premier Fire Systems Limited | Extraterritorial | 2015 |
| Premier Heating South East Ltd | Construction | 2015 |
| Premier Pack Ltd | Wholesale & retail | 2026 |
| Premier Probate Ltd | Public administration | 2018 |
| Premier Wills (Rochford) Ltd | Public administration | 2016 |
| Premier Wills (Southend) Ltd | Public administration | 2016 |
| Premiere London Builders Limited | Construction | 2018 |
| Premium Construction Ltd | Real estate | 2019 |
| Premjall Limited | Professional & scientific | 2022 |
| Prickly Pets Limited | Extraterritorial | 2014 |
| Pride & Joy Classic Cars Limited | Wholesale & retail | 2002 |
| Prihika Authentic Eats Ltd | Hospitality | 2026 |
| Prime Care (UK) Limited | Other services | 1999 |
| Prime Products Interiors Ltd | Wholesale & retail | 2022 |
| Prime Products Ltd | Manufacturing | 2015 |
| Prime Venutres Group Limited | Real estate | 2025 |
| Primefleet Limited | Other services | 2009 |
| Primus Lumen Pictures Ltd | Information & communication | 2021 |
| Print for London Limited | Professional & scientific | 2004 |
| PRINT4LONDON Limited | Professional & scientific | 2004 |
| Printing Southend Limited | Manufacturing | 2026 |
| Printpeel&Stick Limited | Manufacturing | 2024 |
| Printxtreme Ltd | Manufacturing | 2019 |
| PRIORITY1 Secretarial Services Ltd | Administrative & support | 2012 |
| Priory Blinds and Beds Limited | Manufacturing | 2005 |
| Priory Construction (Clerk of Works) Limited | Professional & scientific | 2012 |
| Priory Financial Services Limited | Financial services | 2023 |
| Prittlewell Developments Limited | Real estate | 2012 |
| Pro 8 Ltd | Professional & scientific | 2021 |
| Pro Lofts Essex Ltd | Construction | 2017 |
| Pro Rental Maintenance Ltd | Construction | 2024 |
| Proactive Civil Engineering Ltd | Construction | 2025 |
| Proactive UK Recruitment Solutions Ltd | Administrative & support | 2025 |
| Proatech UK Limited | Information & communication | 2019 |