| Page Creative Limited | Manufacturing | 1990 |
| Page Digital Agency Limited | Manufacturing | 2025 |
| Pago Build Ltd | Wholesale & retail | 2024 |
| Paine Batchelor Limited | Administrative & support | 2013 |
| PAINTS4TRADE.COM Limited | Wholesale & retail | 2005 |
| Palason (CLC) Ltd. | Professional & scientific | 2011 |
| Palisadesecure Systems Ltd | Information & communication | 2022 |
| Palisadesecure Technologies Ltd | Information & communication | 2020 |
| Pall Mall Freehold Limited | Real estate | 2022 |
| Palm Catering Ltd | Hospitality | 2018 |
| Palm Leisure Ltd | Hospitality | 2022 |
| Palmer Mckendry Ltd | Administrative & support | 2021 |
| Pannell Developments Limited | Construction | 1983 |
| Pannell Investments Limited | Construction | 1991 |
| Panoptic Technology Limited | Information & communication | 2010 |
| Panorama Advertising & Promotions LLP | | 2011 |
| Panthera Property Limited | Real estate | 2017 |
| Paper Mill Holdings Ltd | Other services | 2022 |
| Papertotal Limited | Administrative & support | 2003 |
| Paradigm Pioneers Limited | Professional & scientific | 2010 |
| Paradigmz Real Estate Ltd | Real estate | 2020 |
| Paragon Mealbox Limited | Manufacturing | 2026 |
| Pareri Consulting Limited | Administrative & support | 2016 |
| Park Bench Pictures Ltd | Information & communication | 2015 |
| Park Court Residents (Felixstowe) Limited | Households | 2004 |
| Park VUE Dental Ltd | Health & social care | 2023 |
| Parkdale Homes Limited | Construction | 2008 |
| Parker Crane Estates Ltd | Real estate | 2024 |
| Parkside Services U.K. Limited | Administrative & support | 2001 |
| Parkview 12 Ltd | Real estate | 2020 |
| Parkview Wickford Limited | Construction | 2018 |
| Parnell & Sons Project Management Ltd | Professional & scientific | 2026 |
| Parsons Handcrafted Furniture Limited | Manufacturing | 2024 |
| Parthenon Investments Ltd | Arts & recreation | 2010 |
| Partition Arts Limited | Manufacturing | 2018 |
| Passion Properties Ltd | Real estate | 2020 |
| Paton-Brown Consultancy Ltd | Administrative & support | 2017 |
| Patronus Technologies Ltd | Information & communication | 2023 |
| Paul & JAY Properties Limited | Real estate | 2024 |
| Paul a Green Limited | Professional & scientific | 1996 |
| Paul Edwards Family LLP | | 2017 |
| Paul Glass Property Improvements Limited | Construction | 2009 |
| Paul Jones Commercials Ltd | Wholesale & retail | 2012 |
| Paul Newman Interiors Limited | Wholesale & retail | 2001 |
| Paul O'Brien Design Limited | Professional & scientific | 2025 |
| Paul Sudbury Ltd | Other services | 2021 |
| Pauline Shepherd Limited | Health & social care | 2002 |
| Paulmead Property Co. Limited | Professional & scientific | 1993 |
| Pavilion Kiosks Limited | Hospitality | 2009 |
| Paviour Property Services Limited | Real estate | 2006 |
| Paws on Planes Pet Travel Services Ltd | Other services | 2011 |
| PC Design Consultancy Limited | Professional & scientific | 2019 |
| PCP Special Works Ltd | Construction | 2025 |
| Pcrepairsouthend Limited | Information & communication | 2013 |
| PCS Professional Services Limited | Wholesale & retail | 2018 |
| PCV Recruitment & Training Ltd | Administrative & support | 2021 |
| PD Sales Consultancy Ltd | Other services | 2018 |
| PDA Coaching Ltd | Other services | 2016 |
| PDM (Essex) Solutions Ltd | Financial services | 2017 |
| PDM Global Ltd | Financial services | 2011 |
| Pdqa Ltd | Wholesale & retail | 2013 |
| Peach Building Solutions Ltd | Construction | 2019 |
| Peak Performance Health & Wellbeing Ltd | Arts & recreation | 2024 |
| Peak Security Systems Limited | Administrative & support | 2000 |
| Pearl and Carter Carriage Occasions Limited | Transport & logistics | 2022 |
| Pearl Building Services Limited | Construction | 2019 |
| Pebbles Two Limited | Hospitality | 2000 |
| Peeled Business Solutions Limited | Information & communication | 2020 |
| Peggy Sues Piano Bar Ltd | Wholesale & retail | 2013 |
| PEL Consultancy Ltd | Construction | 2021 |
| PELLCO2 Limited | Other services | 2022 |
| Peluka Salon Limited | Wholesale & retail | 2022 |
| Penn Network Ltd | Information & communication | 2026 |
| Penyu Creative Ltd | Manufacturing | 2016 |
| Pera Health Ltd | Professional & scientific | 2024 |
| Perand Property Limited | Real estate | 2024 |
| Performance Coatings Limited | Manufacturing | 2000 |
| Perks Developments Limited | Construction | 2024 |
| Perma Collective Limited | Professional & scientific | 2020 |
| Permit Procurement Limited | Administrative & support | 2019 |
| Personal Touch Accounting Leigh Ltd | Professional & scientific | 2018 |
| Personal Training Chelmsford Ltd | Health & social care | 2023 |
| Personal Travel Concierge Limited | Administrative & support | 2023 |
| Personalised Branding Essex Limited | Wholesale & retail | 2023 |
| Pet Friendly Properties (Europe) Ltd | Real estate | 2023 |
| Petche Limited | Professional & scientific | 2016 |
| Peter B Rauh Ltd | Health & social care | 2011 |
| PF Financial Investigations Limited | Administrative & support | 2011 |
| PGH Carpentry & Joinery Limited | Manufacturing | 2020 |
| PH Freehold Ltd | Real estate | 2020 |
| Phab Trading Limited | Hospitality | 2022 |
| Pharaoh Construction Ltd | Construction | 2025 |
| Pharma Auctions (BPA) Ltd | Wholesale & retail | 2018 |
| Phdh Associates Ltd | Information & communication | 2019 |
| Phil Gibson Plastering Contractors Limited | Construction | 1997 |
| Philip Lawrence Properties Limited | Real estate | 2024 |
| Phipps & Associates Ltd | Construction | 2012 |
| Phoenix Care Group Ltd | Health & social care | 2020 |
| Phoenix Maintenance and Development Ltd | Construction | 2019 |
| Phoenix Pumps and Motors Ltd | Manufacturing | 2026 |