| Pancapital Building & Maintenance Limited | Construction | 2015 |
| Pancom Ltd. | Administrative & support | 2009 |
| Panda Printables Ltd | Wholesale & retail | 2025 |
| Panda's Childcare Ltd | Health & social care | 2016 |
| Pandasaurus Ltd | Wholesale & retail | 2023 |
| Pandda Trading Limited | Wholesale & retail | 2026 |
| Panjtani Carpets and Flooring Ltd | Wholesale & retail | 2026 |
| Pantheon Global Limited | Information & communication | 2014 |
| Panthera Capital Partners Ltd | Financial services | 2023 |
| Panthera SP Limited | Administrative & support | 2025 |
| PAO Construction Services Ltd | Construction | 2025 |
| PAP Repair Ltd | Other services | 2026 |
| Papa Luigi (Franchise) 1990 Limited | Real estate | 1990 |
| Papa Luigi (London Road) Ltd | Manufacturing | 2013 |
| Papa Luigi Franchise 90 Online Ltd | Information & communication | 2025 |
| Papa Luigi Walton Limited | Hospitality | 2025 |
| Paper Mill Lane Properties Limited | Construction | 2004 |
| Paper Planes Ltd | Information & communication | 2011 |
| Paperdrop Limited | Information & communication | 2022 |
| Papierz Logistics Ltd | Transport & logistics | 2014 |
| Papworth Developments Ltd | Construction | 2020 |
| Papyrus Road Management Company Limited | Households | 1987 |
| Papyrus Storage and Development Ltd | Construction | 2020 |
| Paradigm Bicycles Limited | Wholesale & retail | 2019 |
| Paradigm Bicycles Workshop Limited | Other services | 2023 |
| Paradigm Digital Solutions Ltd | Information & communication | 2023 |
| Paradigm Employment Services Ltd | Administrative & support | 2021 |
| Paradigm IT Consulting Limited | Information & communication | 2022 |
| Paradise Grilled Chicken Limited | Hospitality | 2023 |
| Paradise Investments (Whittlesey) Limited | Financial services | 2023 |
| Paradise Properties ( Whittlesey ) Limited | Construction | 2010 |
| Paragon Prepared Fruit Ltd | Manufacturing | 2025 |
| Parallel Ventures Group Ltd | Information & communication | 2026 |
| Paramount Kitchens (Midlands) Ltd | Manufacturing | 2015 |
| Paratus Group Limited | Professional & scientific | 2024 |
| Parcelera Ltd | Wholesale & retail | 2017 |
| Parea Developments Limited | Construction | 2024 |
| Parea Property Limited | Real estate | 2021 |
| Parea X Cassa Ltd | Construction | 2022 |
| Paris Inspired Ltd | Wholesale & retail | 2023 |
| Parish Nursing Ministries UK | Health & social care | 2005 |
| Park Air Systems Limited | Information & communication | 1985 |
| Park Court Property Management Company (York) Limited | Real estate | 2009 |
| Park Crescent Motors Ltd | Wholesale & retail | 2025 |
| Park Crescent Properties Ltd | Real estate | 2026 |
| Park Farm (Langtoft) Management Company Limited | Administrative & support | 2007 |
| Park Farm Thorney Investments Limited | Financial services | 2025 |
| Park Hill Enterprise Limited | Wholesale & retail | 2016 |
| Park House School Limited | Education | 2004 |
| Park Landscapes (Northampton) Limited | Administrative & support | 2003 |
| Park Lane Groundworks Limited | Wholesale & retail | 1991 |
| Park Place Oakham Residents Management Company Limited | Households | 2017 |
| Park Vista Care Homes Limited | Health & social care | 2011 |
| Parker & Grange Limited | Information & communication | 2014 |
| Parker Jones Estates Ltd | Real estate | 2020 |
| Parker Rhode Developments Ltd | Construction | 2024 |
| Parkers Carpentry Limited | Construction | 2019 |
| Parkhome and Lodge Management Services Limited | Hospitality | 2019 |
| Parkside Hub CIC | Administrative & support | 2022 |
| Parkway Developments UK Ltd | Construction | 2009 |
| Parkway Hellas Holdings Limited | Administrative & support | 2004 |
| Parkway I P R Limited | Administrative & support | 2000 |
| Parnell Vehicle Group Ltd | Wholesale & retail | 2018 |
| Parnesco Ltd | Wholesale & retail | 2023 |
| Parsnip Crumble Limited | Wholesale & retail | 2024 |
| Parsnip Ltd | Real estate | 2025 |
| Parsons Consulting Engineers Ltd. | Professional & scientific | 2014 |
| Parsons Place (Coates) Ltd | Construction | 2022 |
| Parsons Prospect Management Company Limited | Households | 2014 |
| Parsons Sun Properties Ltd | Real estate | 2023 |
| Part Play Limited | Arts & recreation | 2015 |
| Particle Measuring Systems U.K. Limited | Professional & scientific | 2011 |
| Partitions and Operable Walls Ltd | Manufacturing | 2026 |
| Partnered Care Ltd | Health & social care | 2026 |
| Parts Supplier Ltd | Wholesale & retail | 2019 |
| Party ALL the Time Limited | Administrative & support | 2024 |
| Party Express Ltd | Extraterritorial | 2008 |
| PARTYSUPPLI3S4U Ltd | Wholesale & retail | 2026 |
| Parub Limited | Real estate | 2023 |
| Pass Plus Ltd | Education | 2025 |
| Pass Pro Driving School Ltd | Education | 2025 |
| Passenger Assist Cambridgeshire Limited | Transport & logistics | 2022 |
| Passion Care Staffing Ltd | Health & social care | 2014 |
| Passion to Succeed Limited | Administrative & support | 2017 |
| Passionate Garden Services Limited | Administrative & support | 2019 |
| Passive FC Limited | Real estate | 2024 |
| Passmyrx Ltd | Education | 2025 |
| Passport Planners Limited | Wholesale & retail | 2023 |
| Pasture View Nurturing Homes Ltd. | Health & social care | 2018 |
| PAT Bates UK Ltd | Professional & scientific | 2022 |
| PAT Luxe Ltd | Other services | 2026 |
| Pat-Transport Ltd | Transport & logistics | 2020 |
| Patch Planet Ltd | Wholesale & retail | 2026 |
| Patel & Makwana Dentique Ltd | Health & social care | 2019 |
| Path Mortgages Ltd | Financial services | 2022 |
| Path Pro Travellers Limited | Administrative & support | 2025 |
| Pathryn ENG Ltd | Professional & scientific | 2018 |
| Pathway CHC Support Limited | Professional & scientific | 2025 |
| Pathway Support Services Ltd | Other services | 2022 |
| Patie Ltd | Real estate | 2021 |