| Philippe Jason Limited | Other services | 2001 |
| Phillimore Estates Limited | Real estate | 1999 |
| Phillips Agri Contracting and Haulage Ltd | Other services | 2019 |
| Philocalist Collective Limited | Real estate | 2025 |
| Philocalist Limited | Professional & scientific | 2023 |
| PHL Best Practice Services Limited | Health & social care | 2003 |
| PHL Group Finance Limited | Financial services | 2022 |
| PHL Group G1 Limited | Financial services | 2025 |
| PHL Group Holdco Limited | Financial services | 2022 |
| PHL Group Midco Limited | Financial services | 2022 |
| PHL Group V1 Limited | Financial services | 2025 |
| PHL Horizon Ltd | Financial services | 2022 |
| PHL Integrated Care Limited | Health & social care | 2015 |
| PHL Primary Care Limited | Health & social care | 2016 |
| PHL Professionals Ltd | Administrative & support | 2019 |
| PHL Youla Limited | Health & social care | 2019 |
| Phoenix & Property Group Ltd | Real estate | 2025 |
| Phoenix Farms Ltd | Wholesale & retail | 2026 |
| Phoenix Systems UK Limited | Manufacturing | 2002 |
| Phones and Vapes Lord Ltd | Wholesale & retail | 2026 |
| PHONES4U.COM Mobile Limited | Information & communication | 2019 |
| Phorest Ltd | Wholesale & retail | 2022 |
| Phronesis Fire Engineering Limited | Professional & scientific | 2026 |
| PHS Transport Services Ltd | Transport & logistics | 2025 |
| Phvc Group Limited | Professional & scientific | 1994 |
| Phvc Limited | Financial services | 1997 |
| PHX Holdings Limited | Financial services | 2020 |
| Phys ED Consultancy Limited | Other services | 2016 |
| Physio World Limited | Professional & scientific | 2015 |
| Pickard Enterprises Ltd | Professional & scientific | 2015 |
| Pierrot Marketing Limited | Manufacturing | 1992 |
| PIG and Porter Limited | Manufacturing | 2012 |
| PIK ME UP Confectionery Co Limited | Wholesale & retail | 2014 |
| Pikl Ltd | Administrative & support | 2025 |
| Pilarstone Care Ltd | Health & social care | 2024 |
| Pilgrims Gate B.W. RTM Company Limited | Households | 2015 |
| Pimlico Specsavers Limited | Wholesale & retail | 2022 |
| Pinion Drive Ltd | Wholesale & retail | 2025 |
| Pink Skip Hire Limited | Extraterritorial | 2006 |
| Pinnacle Acoustic Solutions Ltd | Construction | 2025 |
| Pinnacle Real Estate Ventures Limited | Real estate | 2024 |
| Pinner Specsavers Limited | Wholesale & retail | 2018 |
| Pioneer Savings & Investments Limited | Real estate | 2015 |
| Pipedreems Group Ltd | Wholesale & retail | 2020 |
| Pirate Pasties Wickham Ltd | Hospitality | 2024 |
| Pitney Gowing Electrical Contractors Limited | Administrative & support | 2018 |
| Pitts Business Consultancy Limited | Financial services | 2020 |
| Pixie's Limited | Other services | 2022 |
| Pizza Tanhaie Limited | Hospitality | 2024 |
| PJ Office Solutions Ltd | Wholesale & retail | 2023 |
| PJK Aircraft Services Ltd | Manufacturing | 2024 |
| PJS Bathrooms Heating Kitchens Limited | Construction | 2019 |
| PJS Home Installations Ltd | Construction | 2023 |
| PK Digital Health Consulting Ltd | Professional & scientific | 2025 |
| Pkbc Limited | Construction | 2016 |
| PKM Properties NO.7 Limited | Real estate | 2022 |
| Pkuk Ltd. | Arts & recreation | 2015 |
| Plantagenet Developments Limited | Construction | 1997 |
| Plantation Capital Limited | Agriculture & fishing | 2008 |
| Plasvent Limited | Manufacturing | 2018 |
| Platinum Care Solutions Group Limited | Health & social care | 2020 |
| Platinum Circle Consulting Ltd | Real estate | 2023 |
| Platinum Facilities & Maintenance Services Limited | Construction | 1968 |
| Platinum Group Services Limited | Professional & scientific | 2021 |
| Platinum Tattoo Lounge Ltd | Arts & recreation | 2021 |
| Play and Climb Ropes Ltd | Construction | 2022 |
| Play Brands Ltd | Wholesale & retail | 2022 |
| Playball Hampton Ltd | Arts & recreation | 2025 |
| Playball KT Ltd | Arts & recreation | 2025 |
| Playball TW Ltd | Arts & recreation | 2025 |
| Playful Prints Limited | Wholesale & retail | 2025 |
| Playmaker Creative Studio LLP | | 2018 |
| Pleiades Global Limited | Other services | 2011 |
| Plennty's Ltd | Hospitality | 2024 |
| Plex Nutrition Ltd | Health & social care | 2018 |
| Plrms Ltd | Construction | 2019 |
| Plumb & Heat IT UK Ltd | Construction | 2019 |
| Plumberoo Ltd. | Construction | 2016 |
| Plumlocations Limited | Real estate | 2016 |
| Plumstone Corporation Limited | Financial services | 2000 |
| Pluto Holdco Limited | Financial services | 2022 |
| Pluto Topco Limited | Financial services | 2022 |
| Plycom Management Limited | Wholesale & retail | 2005 |
| Plymouth Domiciliary Specsavers Limited | Wholesale & retail | 2022 |
| Plymouth Marsh Mills Specsavers Limited | Wholesale & retail | 2015 |
| Plymouth Newmedica Limited | Health & social care | 2021 |
| Plymouth Specsavers Hearcare Limited | Wholesale & retail | 2005 |
| Plymstock Specsavers Limited | Wholesale & retail | 2000 |
| PM Answers Ltd | Professional & scientific | 2011 |
| PMA (Accommodation) Limited | Health & social care | 2020 |
| PMA (Services) Limited | Construction | 2018 |
| PMA Group Limited | Financial services | 2020 |
| PMA Technologies Limited | Information & communication | 2019 |
| PMC Energy Services Ltd | Information & communication | 2025 |
| PMG (Building Design & Consultancy) Limited | Professional & scientific | 2003 |
| PMG Contract Consultancy Ltd | Professional & scientific | 2013 |
| PMG Properties and Development Limited | Real estate | 2017 |
| PMH Consultancy and Education Ltd | Administrative & support | 2015 |
| PMJ Catering Ltd | Hospitality | 2023 |
| PMN Wedding Fayres Ltd | Administrative & support | 2010 |