| P&O Ferries Division Holdings Limited | Transport & logistics | 2006 |
| P&O Ferries Division Pension Trustees Limited | Transport & logistics | 2007 |
| P&O Ferries Holdings Limited | Transport & logistics | 2006 |
| P&O Ferries Limited | Transport & logistics | 1929 |
| P&O Ferries Port Services Limited | Transport & logistics | 1990 |
| P&O Ferries Pride of Hull Limited | Transport & logistics | 1958 |
| P&O Ferries Ship Management Limited | Transport & logistics | 1997 |
| P&O Ferries Thames Limited | Transport & logistics | 2009 |
| P&O North Sea Ferries Limited | Transport & logistics | 1964 |
| P&O Offshore Energy Limited | Transport & logistics | 2013 |
| P&O Ship Management (Irish Sea) Limited | Transport & logistics | 1970 |
| P&O Short Sea Ferries Limited | Transport & logistics | 1996 |
| P&S Roofing Contractors Limited | Construction | 2020 |
| P.V. South East Limited | Construction | 2023 |
| P1C Limited | Arts & recreation | 2016 |
| P4R Ltd | Manufacturing | 2025 |
| P>A Executive Search Limited | Administrative & support | 2016 |
| Paaji Electrics Limited | Construction | 2017 |
| Paak Projects Limited | Construction | 2022 |
| Paal Medical Ltd | Health & social care | 2022 |
| Paalflow Ltd | Wholesale & retail | 2026 |
| Pace Hire Services Ltd | Hospitality | 2026 |
| Pace Protection and Training Ltd | Administrative & support | 2023 |
| Pacific Consulting Services Limited | Financial services | 2021 |
| Pacio Ltd | Construction | 2019 |
| Pack Agri-Industrial Group Limited | Financial services | 2025 |
| Pack-Man Consulting Ltd | Administrative & support | 2023 |
| Padda RENOVATION89 Ltd | Construction | 2026 |
| Padel Channel Ltd | Information & communication | 2026 |
| Padel TEK Limited | Arts & recreation | 2024 |
| Padelz Limited | Arts & recreation | 2025 |
| Pagesuite Holdings Limited | Professional & scientific | 2015 |
| Pagesuite Limited | Information & communication | 2006 |
| PAH Carpentry Limited | Construction | 2016 |
| Paham Ltd | Information & communication | 2017 |
| Paint IT Right Ltd | Construction | 2022 |
| Paintshack Ltd | Wholesale & retail | 2023 |
| Pairmediapro Limited | Wholesale & retail | 2025 |
| Pakistani Zaika Ltd | Hospitality | 2024 |
| Palaah Creative Studio Limited | Professional & scientific | 2024 |
| Palace Properties (Kent) Limited | Real estate | 2019 |
| Palace View Management Company Limited | Households | 2021 |
| Palaqui Ltd | Professional & scientific | 2024 |
| Palingesi Ltd | Wholesale & retail | 2019 |
| Pallant Limited | Real estate | 2018 |
| Palm Angle Services Limited | Administrative & support | 2025 |
| Palm Consultancy Services Ltd. | Professional & scientific | 2017 |
| Palmela (UK) Ltd | Professional & scientific | 2022 |
| Palmer Electrical Solutions Ltd | Construction | 2023 |
| Palmerston Grey Limited | Professional & scientific | 2020 |
| Palmstead Nurseries Limited | Agriculture & fishing | 1998 |
| Pals Together Limited | Manufacturing | 2020 |
| Pamela Jones Ltd | Administrative & support | 2015 |
| Pampa Mews Limited | Real estate | 2020 |
| Panacea Suite Ltd | Information & communication | 2022 |
| Pancha Sports Ltd | Wholesale & retail | 2024 |
| Pancras Group Limited | Professional & scientific | 2025 |
| Pandey Brothers Limited | Hospitality | 2016 |
| Pandey Sons & Daughters Ltd | Hospitality | 2021 |
| Pangea Asset Management Ltd | Construction | 2015 |
| Panoptic Capital Limited | Professional & scientific | 2021 |
| Panther Education Ltd | Education | 2019 |
| Papilius Ltd | Professional & scientific | 2026 |
| Pappaya Academy Ltd | Information & communication | 2017 |
| Papyrus Solutions Ltd | Information & communication | 2021 |
| Paracons Limited | Construction | 2017 |
| Parade Estates Limited | Construction | 1980 |
| Paradise MX Holidays Spain Limited | Arts & recreation | 2016 |
| Paradygm Partners Limited | Professional & scientific | 2025 |
| Paragon Build Group Ltd | Construction | 2025 |
| Paragon Building Services Ltd | Construction | 2025 |
| Paragon Heating & Plumbing Services Limited | Construction | 2025 |
| Paragon Qhse Management Services Ltd | Professional & scientific | 2019 |
| Parakletos Pictures Academy Ltd | Information & communication | 2019 |
| Param Home Ltd | Real estate | 2023 |
| Paramount Consortium Ltd | Real estate | 2023 |
| Paramount Contracts GB Limited | Wholesale & retail | 1997 |
| Paramount Plastics Ltd | Manufacturing | 2020 |
| Paramyog Holdings Limited | Information & communication | 2018 |
| Parcel Giant Logistics Limited | Transport & logistics | 2015 |
| Parcelix Ltd | Transport & logistics | 2026 |
| Pared Limited | Information & communication | 2026 |
| Parfum Parfait Ltd | Real estate | 2015 |
| Pari Hair Ltd | Other services | 2015 |
| Park House Farm Developments (Kent) Ltd | Construction | 2017 |
| Park Live Events Ltd | Arts & recreation | 2024 |
| Park ROW Hotel Limited | Hospitality | 2012 |
| Park to Pro Limited | Arts & recreation | 2024 |
| Parker Electrical and Building Ltd | Construction | 2014 |
| Parkhouse Interiors Ltd | Construction | 2009 |
| Parkoo Limited | Information & communication | 2022 |
| Parkview Treasury Services (UK) Limited | Professional & scientific | 2007 |
| Pars Trans UK Limited | Transport & logistics | 2022 |
| Particon Building and Civil Engineering Limited | Construction | 2013 |
| Party POD Events Ltd | Arts & recreation | 2022 |
| Paruchuri Ltd | Professional & scientific | 2013 |
| Parworks Ltd | Construction | 2025 |
| PAS Property Solutions Ltd | Real estate | 2018 |
| Pasal Limited | Wholesale & retail | 2024 |
| Pasoi Ltd | Transport & logistics | 2017 |