| Panache Outerwear Limited | Manufacturing | 2000 |
| Panic the Mother Ltd | Wholesale & retail | 2018 |
| Paragon Circle Limited | Health & social care | 2014 |
| Parang Ltd | Professional & scientific | 2019 |
| Parker RAE Recruitment Ltd | Administrative & support | 2024 |
| Parking Compare Limited | Information & communication | 2021 |
| Pasha Cleaning, Care & Support Services Ltd | Administrative & support | 2025 |
| Pastorfrigor GB Limited | Manufacturing | 2004 |
| Paul Morris Ltd | Construction | 2023 |
| PB Wings Ltd | Education | 2025 |
| PBG Events Ltd | Professional & scientific | 2021 |
| Pchaka Limited | Health & social care | 2013 |
| Pcmj Consultancy Limited | Other services | 2013 |
| PDR Contracting Limited | Administrative & support | 2014 |
| PDR Customs Ltd | Manufacturing | 2025 |
| Peck's Landscapes Ltd | Administrative & support | 2026 |
| Pecus LLP | | 2017 |
| Pedley Property Group Limited | Households | 2020 |
| Pedley Property Management Limited | Real estate | 2023 |
| Peerless Plumbing Ltd | Construction | 2019 |
| Perfectly Pearly Whites Ltd | Other services | 2024 |
| Performance & Prestige Cars Ltd | Wholesale & retail | 2023 |
| Perry Removals Limited | Transport & logistics | 1994 |
| Perryonline.Info Limited | Other services | 2005 |
| Petchey Building Contractors Ltd | Construction | 2016 |
| Petflex Limited | Agriculture & fishing | 2025 |
| Petit One Limited | Real estate | 2012 |
| Petsmart Trade Solutions Ltd | Wholesale & retail | 2023 |
| Philip & Angela Brock Ltd | Administrative & support | 2013 |
| PHR Agricultural Engineering Ltd | Manufacturing | 2019 |
| Physio Goals 4 Kids Ltd | Health & social care | 2018 |
| Physiotherapy Plus Essex Ltd | Administrative & support | 2016 |
| Pickles Land & Property Limited | Real estate | 2021 |
| Piek Solutions Limited | Households | 2023 |
| Pier 22 Limited | Construction | 2017 |
| Pilates With Paula (Essex) Ltd | Arts & recreation | 2019 |
| Pinet R & D Limited | Professional & scientific | 2014 |
| Pioneer Business Development Limited | Professional & scientific | 2012 |
| Pioneer Selection Limited | Administrative & support | 2007 |
| Pitstop Snacks Ltd | Hospitality | 2020 |
| Pixsel Media Limited | Professional & scientific | 2021 |
| PJH Food Consulting Ltd | Professional & scientific | 2025 |
| Plant Faced Ltd | Wholesale & retail | 2021 |
| Plastic Surgery London Ltd | Health & social care | 2016 |
| Platemart Limited | Extraterritorial | 2002 |
| Platinum Pace Logistics Limited | Transport & logistics | 2021 |
| PLR Commercials Ltd | Other services | 2025 |
| PNF Consulting Limited | Administrative & support | 2025 |
| Polanka Ltd | Real estate | 2021 |
| Polaris Properties (Essex) Ltd | Real estate | 2019 |
| Poppy’S Poochy Paws Ltd | Other services | 2024 |
| Porters Hall LLP | | 2022 |
| Portmoor Limited | Real estate | 2013 |
| Positive Economics Ltd | Administrative & support | 2019 |
| Positive VA Solutions Ltd | Administrative & support | 2021 |
| Poulton Quality Solutions Limited | Professional & scientific | 2018 |
| PP Essex Solutions Ltd | Information & communication | 2018 |
| PPG Fitness Limited | Arts & recreation | 2026 |
| Prakash Healthcare Ltd | Health & social care | 2011 |
| Precise Fire & Security Ltd | Administrative & support | 2011 |
| Precision Alpha Limited | Financial services | 2024 |
| Precision Timber Fabrication Workshop Ltd | Manufacturing | 2025 |
| Premierstonecleaning Ltd | Construction | 2026 |
| Prestige Property Staging Ltd | Professional & scientific | 2025 |
| Prime Homecare Group Limited | Health & social care | 2019 |
| Prime Thyme Kitchen Limited | Hospitality | 2022 |
| Prime Venture Group Limited | Wholesale & retail | 2017 |
| Prince Recycling Limited | Water & waste | 1989 |
| Printandstitchclothing Ltd | Wholesale & retail | 2023 |
| Priors Green Cafe Ltd | Hospitality | 2024 |
| Priory Autos Ltd | Wholesale & retail | 2019 |
| Priory Place EC Ltd | Agriculture & fishing | 2026 |
| Pristine Clean and Maintenance Limited | Construction | 2021 |
| Private Skies Ltd | Wholesale & retail | 2012 |
| Pro Elite Player Agency Ltd | Professional & scientific | 2025 |
| Pro-Tuition Essex Ltd | Education | 2020 |
| Prodware Solutions Limited | Information & communication | 2025 |
| Professional Car Delivery Ltd | Transport & logistics | 2019 |
| Project Answers Limited | Information & communication | 2009 |
| Project Solver Limited | Construction | 2003 |
| Propellent Breweries Ltd | Manufacturing | 2023 |
| Prospect Fire Ltd | Construction | 2020 |
| Protech Electrics Limited | Construction | 2017 |
| PTF Consultancy Services Ltd | Information & communication | 2018 |
| PTP Plumbing and Heating Ltd | Construction | 2014 |
| Pufferfish 28 Limited | Other services | 2016 |
| Puffin Pre-School Ltd | Education | 2023 |
| Pulse Irrigation Limited | Construction | 2001 |
| Pure Green Connectivity Ltd | Professional & scientific | 2024 |
| Pure Hire Group Ltd | Administrative & support | 2022 |
| Pure Hire Limited | Administrative & support | 2006 |
| Purple Patch Interactive Ltd | Information & communication | 2025 |
| Puttocks Farm Limited | Hospitality | 2005 |
| PVC Tube Online Limited | Wholesale & retail | 2006 |
| PW Professional Associates Limited | Financial services | 2026 |
| PXL FM Limited | Administrative & support | 2009 |
| QMX Laboratories Limited | Wholesale & retail | 1994 |
| Quality Vehicle Sales (UK) Ltd | Wholesale & retail | 2023 |
| Quay Logistics Ltd | Construction | 2018 |
| Quickfill Grab Hire Ltd | Transport & logistics | 2025 |