| Precision Accountants Ltd | Professional & scientific | 2016 |
| Precision Plasterers (Kent) Ltd | Construction | 2011 |
| Precision Profiles Limited | Information & communication | 2026 |
| Preferred Insurance Brokers Ltd. | Financial services | 2020 |
| Premier Cctv Systems Ltd | Administrative & support | 2013 |
| Premier Residential Property Growth Limited Partnership | | 2011 |
| Premier Roofing Improvements Ltd | Construction | 2024 |
| Premier Safes & Locks Ltd | Administrative & support | 2013 |
| Premium Car Buying Service Limited | Wholesale & retail | 2020 |
| Prenlake Properties Limited | Administrative & support | 1995 |
| Prepario Limited | Information & communication | 2009 |
| Presence & Co Property Limited | Real estate | 2023 |
| Presence & Co. Estate Agents Limited | Real estate | 2022 |
| Prestige Refinishing Ltd | Wholesale & retail | 2015 |
| Preston Farm Shoreham Limited | Construction | 2019 |
| Pretty Problems Ltd | Manufacturing | 2009 |
| Pretzel Films Limited | Information & communication | 2004 |
| PRG Property Services Limited | Administrative & support | 2025 |
| Priaranza Ltd | Wholesale & retail | 2010 |
| Price Gardner Management Ltd | Information & communication | 1999 |
| Pricelarco Limited | Other services | 2017 |
| Prikichi Ltd | Professional & scientific | 2025 |
| Prime Aesthetics Clinic Ltd | Health & social care | 2016 |
| Prime Produce Growers Limited | Wholesale & retail | 2023 |
| Prime Produce Limited | Agriculture & fishing | 2008 |
| Prime Rooms (South East) Ltd | Real estate | 2018 |
| Prime Spray UK Ltd | Construction | 2023 |
| Prince's Leisure Group Limited | Hospitality | 1971 |
| Printf Limited | Real estate | 2022 |
| Prisaca Ltd | Transport & logistics | 2024 |
| Pristine Partners Cleaning Ltd | Administrative & support | 2026 |
| PRM Rail Limited | Construction | 2019 |
| Pro BG Roofing Ltd | Construction | 2023 |
| Pro Physio Limited | Financial services | 1999 |
| Pro Plumbers (Kent) Limited | Construction | 2019 |
| Pro-E Consulting Ltd | Professional & scientific | 2025 |
| Procraft Services Limited | Professional & scientific | 2024 |
| Procrete Limited | Transport & logistics | 2006 |
| Prodorsquash International Limited | Extraterritorial | 1995 |
| Products Global Limited | Wholesale & retail | 2023 |
| Profectus Capital Ltd. | Professional & scientific | 2021 |
| Professional Jointing Limited | Administrative & support | 2009 |
| Professional Property Partnerships Limited | Real estate | 2004 |
| Profit Neutral Ltd | Other services | 2021 |
| Proform Concrete Limited | Wholesale & retail | 2011 |
| Progen Land Limited | Professional & scientific | 2015 |
| Progetto Design LLP | | 2014 |
| Progress Flying School Ltd | Transport & logistics | 2023 |
| Project 1 Housing Limited | Construction | 2012 |
| Project 8 Grips Ltd | Manufacturing | 2020 |
| Project Capital Limited | Professional & scientific | 2013 |
| Project Navigation Limited | Administrative & support | 2008 |
| Projektor Digital Limited | Information & communication | 2020 |
| Promatic Ltd | Construction | 2025 |
| Promentum Limited | Information & communication | 1996 |
| Promentum Properties Limited | Real estate | 2008 |
| Promentum Technologies Limited | Administrative & support | 1997 |
| Promotional Mailing Services Group Limited | Transport & logistics | 1964 |
| Proodos Analytics Ltd | Professional & scientific | 2025 |
| Propco 88 Ltd | Real estate | 2025 |
| Propel Ventures Limited | Professional & scientific | 2016 |
| Properties Naizsons Limited | Real estate | 2025 |
| Property Cashflow Ltd | Education | 2024 |
| Property Management & Letting Ltd | Real estate | 2010 |
| Propertymajor (UK) Ltd | Real estate | 2009 |
| Propertyrisks Limited | Extraterritorial | 2005 |
| Proqubus Ltd | Wholesale & retail | 2020 |
| Prosight Consulting Limited | Transport & logistics | 2010 |
| Prospect Arts Limited | Information & communication | 2009 |
| Prospect Financial Limited | Financial services | 2013 |
| Prospect Global Limited | Information & communication | 2015 |
| Prospectam Ltd | Information & communication | 2025 |
| Prosper Robotics Ltd | Information & communication | 2021 |
| Prosperity Education Ltd | Information & communication | 2016 |
| Prosperity English Ltd | Information & communication | 2025 |
| Protagonist (UK) Limited | Wholesale & retail | 2006 |
| Protection Find Ltd | Financial services | 2021 |
| Proton Partners London Limited | Professional & scientific | 2021 |
| Protool Limited | Wholesale & retail | 2009 |
| Proud Electrical London Ltd | Construction | 2022 |
| Proxar Limited | Wholesale & retail | 2008 |
| Proxximos Limited | Information & communication | 2025 |
| Prymacare UK Ltd | Health & social care | 2025 |
| PS Breastfeeding Community Interest Company | Health & social care | 2007 |
| PSI Group Services Limited | Professional & scientific | 2009 |
| Psychwise Ltd | Other services | 2013 |
| Ptrs Holdings Limited | Real estate | 2017 |
| Puleston Jones Limited | Professional & scientific | 2023 |
| Pulman Construction Ltd | Construction | 2019 |
| Pulse Contracting UK Ltd | Professional & scientific | 2025 |
| Pulveris Solar Limited | Administrative & support | 2015 |
| Punchd Limited | Manufacturing | 2026 |
| Puneet Sian Aesthetics Ltd | Other services | 2025 |
| Pure Flow Energy Ltd | Energy | 2025 |
| Pure Gloss Valets Ltd | Administrative & support | 2022 |
| Pure Info Limited | Other services | 2018 |
| Pure Lust Ltd | Wholesale & retail | 2025 |
| Pure Sober Life Limited | Information & communication | 2023 |
| Purely Maintenance Limited | Construction | 2008 |
| Purple Leopard Ltd | Real estate | 2023 |