| Petals & Embers Ltd | Wholesale & retail | 2026 |
| Peter Styles Financial Services Limited | Financial services | 2015 |
| Peters Transport Services Limited | Transport & logistics | 2016 |
| Petrichor Property Procurement Ltd | Real estate | 2022 |
| PFA Essex Ltd | Arts & recreation | 2015 |
| PFP Services Ltd | Professional & scientific | 2019 |
| PFR Consultancy Services Ltd | Professional & scientific | 2021 |
| PHE Complexity Controls Ltd | Professional & scientific | 2021 |
| PHI Advisory Group Ltd | Financial services | 2025 |
| Phil Matthews Ltd | Transport & logistics | 2018 |
| Philia Ltd | Professional & scientific | 2023 |
| Philip Sidney Court RTM Company Ltd | Households | 2025 |
| Phillip Enterprises Ltd | Wholesale & retail | 2025 |
| Phillips Heating Solutions Ltd | Manufacturing | 2026 |
| Phillips Ventures Ltd | Information & communication | 2026 |
| PHO Enterprises Limited | Administrative & support | 2018 |
| Phoenix GRC Ltd | Construction | 2024 |
| Phoenix Handling Services Limited | Manufacturing | 2017 |
| Phoenix Packaging Products (South East) Limited | Manufacturing | 2000 |
| Phoenix Photographic Limited | Professional & scientific | 2004 |
| Physiotherapy Essex Ltd | Health & social care | 2012 |
| Pikes Plastic Products Ltd | Manufacturing | 2025 |
| Pine Court (Beer) Management Limited | Administrative & support | 1994 |
| Pink Energy UK Ltd | Information & communication | 2025 |
| Pink Security Limited | Other services | 2020 |
| Pinnacle Rail Management Limited | Professional & scientific | 2012 |
| Pioneer Services Ltd | Real estate | 2025 |
| Pipewerks Ltd | Construction | 2016 |
| Pipewise Ltd | Construction | 2020 |
| PJC Acoustics Ltd | Construction | 2008 |
| Pjsm Build Limited | Construction | 2023 |
| Pjsm Property Ltd | Real estate | 2023 |
| Plant, Audits & Training Limited | Construction | 2012 |
| Plantion Ltd | Extraterritorial | 2023 |
| Plasterwork Studio Limited | Construction | 2014 |
| Platinum One Solutions Ltd | Wholesale & retail | 2022 |
| Platinum Plumbing & Maintenance Ltd | Construction | 2025 |
| Pleasure Pools Limited | Construction | 2014 |
| Plentia Properties Ltd | Real estate | 2024 |
| PLH Communications Limited | Information & communication | 2017 |
| Plover and Croc Ltd | Information & communication | 2024 |
| Plum Property Investments Ltd | Real estate | 2022 |
| Plums Properties Limited | Real estate | 2021 |
| PM & BS Ltd | Information & communication | 2004 |
| PM Electrical Supplies Limited | Wholesale & retail | 2025 |
| PMC Trading Essex Ltd | Wholesale & retail | 2024 |
| PMJ Building Solutions Limited | Construction | 2025 |
| PMS Engineering Services Ltd | Professional & scientific | 2022 |
| PMS Pharma Ltd | Manufacturing | 2016 |
| POD Bible Ltd | Arts & recreation | 2019 |
| Pola Metals Limited | Manufacturing | 2025 |
| Pola's Food Van Ltd | Hospitality | 2026 |
| Polar Civil Engineering Limited | Construction | 1999 |
| Polysonica Ltd | Arts & recreation | 2024 |
| POP Painted Ltd | Arts & recreation | 2016 |
| Poppy Waddilove Limited | Extraterritorial | 2015 |
| Porsche Neurophysiology Services Ltd. | Health & social care | 2010 |
| Posh 1S Ltd | Wholesale & retail | 2025 |
| Positive Refurb Limited | Construction | 2017 |
| Posu FC Limited | Real estate | 2023 |
| Potenza Construction Limited | Construction | 2022 |
| Potenza Groundwork Solutions Ltd | Construction | 2025 |
| Potenza Group Limited | Households | 2024 |
| Potters Property Holdings Limited | Real estate | 2017 |
| Pound Education Consultants Ltd | Professional & scientific | 2021 |
| Pound Lane Auto Discount Limited | Wholesale & retail | 2022 |
| Powder Processing Limited | Information & communication | 2016 |
| Power AID Electrical Limited | Construction | 2015 |
| Power Electrical Construction Services Limited | Construction | 2010 |
| Ppch Ltd | Other services | 2025 |
| PPO Benfleet Ltd | Hospitality | 2020 |
| PPO Southend Ltd | Hospitality | 2020 |
| PR Allen Trading Limited | Wholesale & retail | 2017 |
| PR Consultancy Services Ltd | Professional & scientific | 2019 |
| Prash Mini Market Ltd | Wholesale & retail | 2003 |
| PRB Consultancy Services Limited | Administrative & support | 2014 |
| Precise Roofing and Lead Work Ltd | Construction | 2020 |
| Precision Colour Ltd | Other services | 2016 |
| Precision Jointing Limited | Construction | 2007 |
| Precision Profit Trading Ltd | Education | 2024 |
| Preeminence Solutions Ltd | Real estate | 2015 |
| Premier Care Essex Limited | Health & social care | 2026 |
| Premier Properties Essex Ltd | Construction | 2023 |
| Premium Imperial Ltd | Real estate | 2023 |
| Premium Meridian Ltd | Real estate | 2025 |
| Prestige Contracts Ltd | Construction | 2016 |
| Prestige Properties & Services Ltd | Real estate | 2015 |
| Prestons Plastering Ltd | Construction | 2013 |
| Preview Investments Limited | Real estate | 1991 |
| Preview Marketing Limited | Manufacturing | 2011 |
| Preview Marketing Tovhill LLP | | 2007 |
| Priest London Ltd | Wholesale & retail | 2026 |
| Primary Sports Stars Ltd | Education | 2022 |
| Printshop Line Ltd | Manufacturing | 2023 |
| Pristine Media Limited | Manufacturing | 2024 |
| Pristine Memorials Limited | Other services | 2023 |
| PRM Commercial & General Limited | Financial services | 2023 |
| Pro Pipe Installations Ltd | Construction | 2026 |
| Pro Tiling (UK) Ltd | Construction | 2006 |
| Procefix Limited | Professional & scientific | 2016 |