| Pircho Limited | Hospitality | 2022 |
| Pishiobury House Management Ltd | Households | 2020 |
| Pivotal Consult UK Ltd | Professional & scientific | 2014 |
| Pivotal Engineering Limited | Professional & scientific | 2014 |
| Pivotal International Ltd | Professional & scientific | 2016 |
| Pivotal Ltd | Extraterritorial | 2025 |
| Pixie Nails Limited | Other services | 2020 |
| Pixosh Holdings Limited | Real estate | 2024 |
| Pizm Property Management Ltd | Real estate | 2018 |
| PJ Industry Ltd | Wholesale & retail | 2025 |
| PJ Snell Ltd | Construction | 2023 |
| Pjsl Limited | Professional & scientific | 2007 |
| Plain (Epping) Management Company Limited(The) | Households | 1975 |
| Pltfm Ltd | Information & communication | 2020 |
| Plumbing on Demand Limited | Construction | 2020 |
| Plush Aesthetics UK Limited | Other services | 2023 |
| Pluto Accountancy Ltd | Professional & scientific | 2024 |
| Pluto Coach Ltd | Information & communication | 2023 |
| PM Land Limited | Professional & scientific | 2012 |
| PMG Trans Ltd | Transport & logistics | 2025 |
| Pmpa Hairdressers Ltd | Other services | 2010 |
| POA Limited | Transport & logistics | 2026 |
| Poikilos | Health & social care | 2013 |
| Polaris Health Ltd | Health & social care | 2025 |
| Polaris Marketing Limited | Other services | 2025 |
| Pole Position Business Solutions Limited | Professional & scientific | 2022 |
| Pole Position Property Limited | Real estate | 2023 |
| Polonia Deli Limited | Wholesale & retail | 2012 |
| Polymime Animation Company Limited | Arts & recreation | 2007 |
| Polymime Ltd | Information & communication | 2025 |
| Pomaril Properties Limited | Construction | 2023 |
| POP Clemmow Enterprises Limited | Other services | 2024 |
| POP Franchising Limited | Administrative & support | 2025 |
| POP Medical Services Limited | Health & social care | 2016 |
| Popchu Enterprises Ltd | Information & communication | 2020 |
| Poppy's Tea Room Ltd | Hospitality | 2018 |
| Portland Resident Association Ltd | Households | 2026 |
| Positiveuk Ltd | Construction | 2016 |
| Potter Street Fishmongers Ltd | Wholesale & retail | 2019 |
| Powdermonkeys Alpine Ltd | Wholesale & retail | 2022 |
| Power Design Studio Ltd | Information & communication | 2022 |
| Power of One Fundraising Limited | Health & social care | 2022 |
| Power-Tork Limited | Extraterritorial | 1999 |
| Powerhog Backpacks Limited | Wholesale & retail | 2021 |
| Powersem Limited | Manufacturing | 1995 |
| Powerzone Gym Systems Ltd | Wholesale & retail | 2025 |
| Practical Property Developments Ltd | Construction | 2020 |
| Practice Portal Limited | Information & communication | 2017 |
| Praxis Global Solutions Limited | Information & communication | 2014 |
| Praxis Leadership Ltd | Professional & scientific | 2026 |
| Precedent Properties Ltd | Real estate | 2024 |
| Precise Wealth Management Limited | Administrative & support | 2017 |
| Premier Drainage Solutions Ltd | Construction | 2019 |
| Premier Metal Roofing & Cladding Co Ltd | Extraterritorial | 2021 |
| Premium Rides Ltd | Transport & logistics | 2024 |
| Prestige Engineering Site Services Ltd | Construction | 2021 |
| Prestige Linen Services Ltd | Other services | 2021 |
| Prestige Padel (Essex) Limited | Arts & recreation | 2025 |
| Prestige Performance by LB Ltd | Wholesale & retail | 2025 |
| Prestige Plasterers Ltd | Construction | 2020 |
| Preston Golf Ltd | Wholesale & retail | 2024 |
| Prestonvalets Ltd | Administrative & support | 2026 |
| Pretty Wild Flowers Limited | Wholesale & retail | 2022 |
| Price Bailey Audit & Assurance LLP | | 2025 |
| Price Bailey London Limited | Administrative & support | 2003 |
| Prima JET Ltd | Manufacturing | 2016 |
| Prime Facilities Management Ltd | Real estate | 2014 |
| Prime Performance Group Ltd | Arts & recreation | 2025 |
| Prime Piling Ltd | Construction | 2021 |
| Primero Property Ltd | Real estate | 2023 |
| Pristine Environmental Services Limited | Administrative & support | 2006 |
| Pro Eleven Sport Limited | Arts & recreation | 2018 |
| Pro Granite and Quartz Limited | Construction | 2022 |
| Pro Tax Plus Bishop's Stortford Ltd | Professional & scientific | 2023 |
| Pro-Valet Ltd | Other services | 2011 |
| Procloud Advisory Ltd | Professional & scientific | 2025 |
| Professional Care Solutions Limited | Wholesale & retail | 2008 |
| Professional People Recruitment Services London Ltd | Other services | 2024 |
| Progredi Capital Ltd | Professional & scientific | 2025 |
| Projects & Holdings Ltd | Agriculture & fishing | 2026 |
| Prolifik Ltd | Information & communication | 2018 |
| Property Owning Organisation Ltd | Real estate | 2023 |
| Property Partnerships Development Managers (UK) Limited | Professional & scientific | 2001 |
| Prophotonix Limited | Manufacturing | 1995 |
| Propstock Community Pubs Limited | Hospitality | 2000 |
| Propstock Limited | Administrative & support | 1995 |
| Prospect Resourcing Limited | Administrative & support | 2002 |
| Proteus Consultants Limited | Professional & scientific | 2011 |
| Provenance Yard Ltd. | Construction | 2025 |
| Prudential Trading Ltd | Information & communication | 2022 |
| Prym Property Ltd | Real estate | 2019 |
| Pryor Farms Holdings Limited | Professional & scientific | 2019 |
| Pryor Farms Limited | Agriculture & fishing | 2003 |
| Pshl Holdings Limited | Real estate | 2025 |
| Pulse Trading Group Limited | Professional & scientific | 2019 |
| Pump House Drive Limited | Households | 1998 |
| Pumpstu Ltd | Construction | 2024 |
| Pure Air Ventilation Systems Limited | Construction | 2019 |
| Purity MED Professional Services Limited | Health & social care | 2026 |
| Purl Partnership Limited | Professional & scientific | 2020 |