| Paddock View (Fordham) Management Company Limited | Households | 2024 |
| Padel Source Ltd | Wholesale & retail | 2025 |
| Padgent Ltd | Professional & scientific | 2000 |
| PAG DRY Liner Ltd | Construction | 2022 |
| Page Education Limited | Education | 2017 |
| Page Plumbing Services Limited | Construction | 2012 |
| Pagepix Ltd | Professional & scientific | 2012 |
| Paia Construction Ltd | Construction | 2025 |
| Pain & Neuromodulation Consulting Ltd | Health & social care | 2016 |
| Pain-Free Property Ltd | Real estate | 2017 |
| Paint IT Wholesale Limited | Wholesale & retail | 2024 |
| Painter PUB Company Ltd | Hospitality | 2019 |
| Painters Place (East Bergholt) Management Company Limited | Households | 2022 |
| Pakotex Limited | Wholesale & retail | 1995 |
| PAL Truck Ltd. | | 1988 |
| Pallet Wrap Ltd | Administrative & support | 2016 |
| Palmdown Developments Limited | Households | 1987 |
| Palmer & Leigh Ltd | Administrative & support | 2019 |
| Palmer & Martin Vehicle Hire Ltd | Wholesale & retail | 2001 |
| Palmer & Partners (Chelmsford) Limited | Real estate | 2024 |
| Palmer & Partners Estate Agents Limited | Real estate | 2004 |
| Palmer Fisher London Limited | Other services | 2019 |
| Palmer French Ltd | Real estate | 2024 |
| Palmer Group Limited | Administrative & support | 2018 |
| Palmer Humphrey Ltd | Construction | 2000 |
| Palmers Roofing Limited | Construction | 2018 |
| Palmier Branch Ltd | Administrative & support | 2022 |
| Palmstream Limited | Construction | 2005 |
| Paloozi Ltd | Information & communication | 2026 |
| Pamidipalli Homes Limited | Real estate | 2024 |
| Panda Carousel Ltd | Wholesale & retail | 2024 |
| Panda Property Associates Ltd | Real estate | 2012 |
| Panda Property Ventures Ltd | Real estate | 2021 |
| Panda Supermart Ltd | Wholesale & retail | 2025 |
| Pandion Property Holdings Ltd | Real estate | 2023 |
| Pane & Vino Deli Ltd | Hospitality | 2025 |
| Paneli Ltd | Wholesale & retail | 2018 |
| Panjab Haulage Services Ltd | Transport & logistics | 2025 |
| Pantheon ADS Ltd | Wholesale & retail | 2024 |
| Panther Cabs (Colchester) Limited | Transport & logistics | 2011 |
| Panther Security Systems Limited | Administrative & support | 1999 |
| Paper Mountain Solutions Ltd | Administrative & support | 2004 |
| Papi Chopa's Pizza Ltd | Hospitality | 2025 |
| Papyrus Associates Limited | Information & communication | 2015 |
| Parabellum Miniatures Limited | Wholesale & retail | 2024 |
| Paradigm D&E Limited | Construction | 2014 |
| Paradime Shift Limited | Health & social care | 2012 |
| Paradise Care Ltd | Health & social care | 2019 |
| Paradise Healthcare Services Ltd | Health & social care | 2012 |
| Paradisum Records Limited | Information & communication | 1997 |
| Paradox Golf Ltd | Arts & recreation | 2025 |
| Paragon Aftercare Ltd | Other services | 2018 |
| Paragon Legal Services Limited | Administrative & support | 1999 |
| Paragon Stainless Products Limited | Manufacturing | 2011 |
| Paragon Storage Ltd | Administrative & support | 2006 |
| Parallel Innovations Ltd | Information & communication | 2022 |
| Paramet Limited | Information & communication | 1998 |
| Paramount Cleaning Solutions Ltd | Administrative & support | 2019 |
| Paramount Price Ltd | Wholesale & retail | 2024 |
| Paranormal Academy Limited | Education | 2017 |
| PARAS'10 Limited | Arts & recreation | 2013 |
| Parasol Coffee Ltd | Hospitality | 2023 |
| Parasol-Uk Ltd | Wholesale & retail | 2022 |
| Paratech Financial Ltd | Financial services | 2023 |
| Parfait Visage Hair & Beauty Limited | Other services | 2018 |
| Pargin Financial Solutions Ltd | Financial services | 2017 |
| Parham Essex Ltd | Construction | 2022 |
| Park Farm Riding Centre Ltd. | Arts & recreation | 2006 |
| Park Hotel RTM Company Ltd | Administrative & support | 2015 |
| Park Lane (Property) Holdings Limited | Real estate | 2020 |
| Park Lane Business Centre Limited | Real estate | 2020 |
| Park Lane Publishing Limited | Information & communication | 2002 |
| Park Lodge Business Consultancy Limited | Professional & scientific | 2018 |
| Park View (Deptford) RTM Company Limited | Households | 2017 |
| Parkbench Studio Ltd | Information & communication | 2024 |
| Parkcourt (Wick) Limited | Health & social care | 2020 |
| Parker Associates Ltd | Professional & scientific | 2006 |
| Parker Berry Carpentry Ltd | Construction | 2010 |
| Parker Castle Limited | Financial services | 2000 |
| Parker Property Consultants Limited | Construction | 2022 |
| Parker Rail Engineering Limited | Professional & scientific | 2014 |
| Parker Safety Limited | Construction | 2025 |
| Parker Surveys Ltd | Professional & scientific | 2019 |
| Parker Wilson Plumbing Ltd | Construction | 2025 |
| Parkin Construction Ltd | Administrative & support | 2015 |
| Parkland Developments Limited | Construction | 2004 |
| Parkland Developments Riverside Limited | Construction | 2009 |
| Parkside Quarter Management Company Limited | Households | 2001 |
| Parkwood RTM Company Limited | Administrative & support | 2005 |
| Paroph Aubergine Limited | Professional & scientific | 2025 |
| Parr's Maintenance Limited | Construction | 2016 |
| Parrett Financial Planning Limited | Professional & scientific | 2018 |
| Parris Lawn Care Ltd | Health & social care | 2018 |
| Parsias Ltd | Information & communication | 2024 |
| Parsoft Limited | Information & communication | 2023 |
| Parsons Court RTM Company Limited | Households | 2009 |
| Parsons Health Care Ltd | Health & social care | 2013 |
| Parthax Industries Ltd | Manufacturing | 2024 |
| Partner in Construction Limited | Construction | 2024 |
| Partnership Events Limited | Administrative & support | 2025 |