| PAS AID Ltd | Information & communication | 2025 |
| Past Properties Ltd | Real estate | 2004 |
| Pathways Care Limited | Public administration | 2018 |
| Paul Harrison (Jewellers) Limited | Wholesale & retail | 2001 |
| Paul Jackson Builder & Contractor Limited | Construction | 1998 |
| Payroll Sorted Limited | Professional & scientific | 2010 |
| PB Law Ltd | Professional & scientific | 2025 |
| Pbite Ltd | Information & communication | 2012 |
| PCM Investments Limited | Construction | 1998 |
| Peacock Promotions London Limited | Arts & recreation | 2018 |
| Peak Home Services Ltd | Professional & scientific | 2025 |
| Pear Tree Catering Services Limited | Wholesale & retail | 1992 |
| Pearl Strategy Ltd | Professional & scientific | 2023 |
| Pears Furniture Ltd | Manufacturing | 2025 |
| Pearsons Building Services Ltd | Construction | 2026 |
| Pecunia Pro Limited | Professional & scientific | 2013 |
| People Savvy Ltd | Professional & scientific | 2015 |
| Pepperpot Lettings Ltd | Real estate | 2017 |
| Perfect Lobes Limited | Health & social care | 2014 |
| Perfection in Petals Ltd | Extraterritorial | 2015 |
| Performance Tuning EA Ltd | Wholesale & retail | 2025 |
| Personalised Warehouse Ltd | Manufacturing | 2021 |
| Pesaro IT Limited | Information & communication | 2020 |
| Pet SET Go Limited | Professional & scientific | 2013 |
| Pete's Recovery Limited | Wholesale & retail | 2018 |
| Peter Cray Brickwork Ltd | Construction | 2007 |
| PFC Lifestyle Ltd | Real estate | 2021 |
| PFS Business Services Limited | Wholesale & retail | 2016 |
| PG Rayleigh Ltd | Hospitality | 2022 |
| Pgmo Solutions Limited | Construction | 2017 |
| Phil Crossingham Inspection Services Ltd | Administrative & support | 2025 |
| Phoenix Building Services & Consultancy Ltd | Construction | 2024 |
| Phoenix Informatics Ltd | Information & communication | 2014 |
| Phoenix Investec Ltd | Real estate | 2020 |
| Phoenix Motor Centre Limited | Wholesale & retail | 1996 |
| Phoenix Service Centre Ltd | Wholesale & retail | 2025 |
| Photoboothy Limited | Professional & scientific | 2014 |
| Photomechanical Services (Essex) Limited | Manufacturing | 1971 |
| Photon Group Ltd | Professional & scientific | 2018 |
| PIC Professional Services Ltd | Information & communication | 2011 |
| Picketts Avenue Ltd | Real estate | 2019 |
| Pier Products Limited | Wholesale & retail | 2024 |
| Pieridae Gifts Ltd | Wholesale & retail | 2018 |
| Pineapple Blue Limited | Real estate | 2005 |
| Pineapple Heaven Ltd | Hospitality | 2019 |
| Pinestaff Limited | Professional & scientific | 1989 |
| Pink Garlic Essex Ltd | Hospitality | 2017 |
| Pink Padel Club Ltd | Arts & recreation | 2026 |
| Pink Tuna Transport Ltd | Transport & logistics | 2017 |
| Pinnacle Controls Limited | Construction | 2026 |
| Pipetrack Limited | Extraterritorial | 2006 |
| Pivotal Property Data Limited | Information & communication | 2026 |
| Plan a Reward Consulting Limited | Professional & scientific | 2018 |
| Plan I.T. (European) Limited | Hospitality | 1995 |
| Play Overseas Limited | Other services | 2021 |
| Playmaker Assets Limited | Extraterritorial | 2016 |
| Plumbarius Plumbing Solutions Ltd | Construction | 2025 |
| PMA BJJ Ltd | Arts & recreation | 2018 |
| PMS Property Limited | Real estate | 2019 |
| Pollock International Ltd | Professional & scientific | 2026 |
| Positive Plan Financial Services Ltd | Financial services | 2015 |
| Power Hygiene & Safety Products Limited | Wholesale & retail | 2004 |
| PR Properties (Essex) Limited | Real estate | 2021 |
| Precision Drive Ltd | Wholesale & retail | 2024 |
| Precision Electrics Ltd | Construction | 2024 |
| Precision EYE Clinic Limited | Health & social care | 2011 |
| Precision Property Services London Limited | Construction | 2025 |
| Premier Ductwork Limited | Construction | 2007 |
| Pressed to Impress Ltd | Other services | 2024 |
| Prestige Healthplans Limited | Financial services | 2011 |
| Preston Court (Westcliff-On-Sea) Freehold Company Limited | Households | 2016 |
| Pretty Salon Deliveries Ltd | Transport & logistics | 2026 |
| Pretty Salon Furniture Ltd | Wholesale & retail | 2025 |
| Prilltune Ltd | Wholesale & retail | 2025 |
| Prime Meats & Grocers Ltd | Wholesale & retail | 2025 |
| Prime Property Management (Essex) Limited | Real estate | 2013 |
| Prime Staffing and Consulting Ltd | Professional & scientific | 2015 |
| Print Craft 24 Ltd | Manufacturing | 2026 |
| Print United UK Ltd. | Wholesale & retail | 2023 |
| Printartuk Ltd | Manufacturing | 2022 |
| Pro Glazing Designs Limited | Construction | 2025 |
| Pro Load Solutions Ltd | Transport & logistics | 2026 |
| Proactive HR Solutions Ltd | Administrative & support | 2026 |
| Proactive Medicare Investments Ltd | Real estate | 2026 |
| Proactive Medicare Limited | Health & social care | 2015 |
| Probate Accountants Essex Ltd | Administrative & support | 2018 |
| Production Space Brighton Limited | Professional & scientific | 2004 |
| Professional Paint Services Limited | Wholesale & retail | 2009 |
| Profile 2000 Windows & Doors Limited | Construction | 2006 |
| Progressive Financial Solutions Limited | Financial services | 2002 |
| Project Pulse Solutions Ltd | Professional & scientific | 2024 |
| Prominent Links Limited | Professional & scientific | 2009 |
| Propel Capital Group Ltd | Information & communication | 2024 |
| Properly Useful Products Ltd | Wholesale & retail | 2026 |
| Property Purchase Group Limited | Construction | 2023 |
| Protect and Lend Ltd | Financial services | 2022 |
| Protected Home Improvement Network Limited | Information & communication | 2018 |
| Proteus Industrial Technologies Limited | Construction | 2012 |
| Proxima London Ltd | Professional & scientific | 2025 |
| PS Rayleigh Ltd | Hospitality | 2024 |