| Plumpanda London Ltd | Wholesale & retail | 2021 |
| Plus Three RTL Limited | Arts & recreation | 2023 |
| PLV Contracts Limited | Extraterritorial | 1999 |
| Pmis Consulting Limited | Professional & scientific | 1993 |
| Point North Electrical Ltd | Construction | 2015 |
| Point of Difference Group Limited | Financial services | 2022 |
| Point of Difference Properties Limited | Real estate | 2015 |
| Point of Difference Workspace Limited | Real estate | 2017 |
| Polaris Top Ltd | Wholesale & retail | 2022 |
| Polemos Ltd | Administrative & support | 2025 |
| Polestar Automotive UK Limited | Wholesale & retail | 2019 |
| Poll Trans Ltd | Water & waste | 2024 |
| Polly Burn Consulting Ltd | Professional & scientific | 2020 |
| Polly Dunseath PR Ltd | Professional & scientific | 2024 |
| Pontac Properties Ltd | Construction | 2013 |
| Poolshield Ltd | Wholesale & retail | 2024 |
| Pop-Up Bargains Ltd | Wholesale & retail | 2025 |
| Porter Productions Ltd | Information & communication | 2025 |
| Portunus Developments Ltd | Construction | 2019 |
| Portway Cattery Limited | Other services | 2020 |
| Poseidon Capital Limited | Extraterritorial | 2019 |
| Positive Results Limited | Professional & scientific | 1989 |
| Potjie MAN Ltd | Hospitality | 2023 |
| Power Rips Ltd | Wholesale & retail | 2025 |
| Powered by Paloma Ltd | Information & communication | 2019 |
| Powersun Limited | Construction | 2010 |
| PPP Logistics Ltd | Transport & logistics | 2016 |
| Practical Design Solutions Ltd | Professional & scientific | 2021 |
| Praeneste Advisors Limited | Professional & scientific | 2022 |
| Pragma Innovation Ltd | Information & communication | 2023 |
| Pramila Consulting Services Ltd | Professional & scientific | 2023 |
| Praxinomics Limited | Professional & scientific | 2011 |
| Precisely Property Limited | Construction | 2019 |
| Precision Bidding Limited | Professional & scientific | 2025 |
| Precision Plus Group Ltd | Administrative & support | 2025 |
| Preen Properties Ltd | Real estate | 2025 |
| Prefab Homes Ltd | Manufacturing | 2022 |
| Prefusion LLP | | 2025 |
| Premier Electricians Ltd | Construction | 2014 |
| Premier Marine Limited | Transport & logistics | 2005 |
| Premier Motorhome Hire Limited | Administrative & support | 2018 |
| Premium Coachworks Limited | Wholesale & retail | 2025 |
| Premiumlawnsuk Ltd | Wholesale & retail | 2020 |
| Premonitions Limited | Other services | 1990 |
| Prep & Match Ltd | Information & communication | 2024 |
| Prepex Medical Ltd | Wholesale & retail | 2024 |
| Prestige Serviced Apartments Limited | Real estate | 2018 |
| Pretty Paints Ltd | Construction | 2023 |
| Priestec Solutions Ltd | Construction | 2020 |
| Prime Laundry Services Ltd | Construction | 2020 |
| Prime Pace Logistics Ltd | Transport & logistics | 2023 |
| Prime Polymer Holdings Ltd | Financial services | 2026 |
| Primrose Haulage Ltd | Transport & logistics | 2025 |
| Principal Health & Safety Limited | Administrative & support | 2003 |
| Principal Medical Limited | Health & social care | 2003 |
| Principal Medical Property Limited | Real estate | 2017 |
| Priory View Management Company Limited | Real estate | 2006 |
| Priscillahb Limited | Professional & scientific | 2018 |
| Prism Realty UK Limited | Real estate | 2021 |
| Private Roads Services Limited | Professional & scientific | 2004 |
| Pro Automotive Specialists Limited | Wholesale & retail | 2022 |
| Pro Wheels Ltd | Wholesale & retail | 2016 |
| Pro-Auto (Bicester) Limited | Wholesale & retail | 2013 |
| Proelio HR Ltd | Administrative & support | 2024 |
| Profitable Manufacture Limited | Information & communication | 2005 |
| Progress Over Perfection Ltd | Health & social care | 2025 |
| Prohubition Ltd | Professional & scientific | 2018 |
| Projectime Limited | Information & communication | 2012 |
| Promto Ltd | Information & communication | 2025 |
| Propensa Prospecting Limited | Administrative & support | 2026 |
| Proper-T & E Lettings Limited | Real estate | 2025 |
| Propert Builder Ltd | Construction | 2024 |
| Property Beehive Ltd | Real estate | 2022 |
| Property Letting Solutions Ltd | Wholesale & retail | 2023 |
| Property Refit Ltd | Construction | 2023 |
| Property South Limited | Real estate | 2023 |
| Prostage Cleaning Company Ltd | Wholesale & retail | 2024 |
| Prostage Detailing Ltd | Wholesale & retail | 2025 |
| Protegrity UK Limited | Information & communication | 2020 |
| Proveho Limited | Information & communication | 2024 |
| Provenis Management & Consultancy Limited | Professional & scientific | 2020 |
| PRP Event Catering Ltd | Hospitality | 2012 |
| Pryce Group Limited | Professional & scientific | 2020 |
| Pryde Accounting Limited | Professional & scientific | 2024 |
| PSD Helicopters Ltd | Transport & logistics | 2022 |
| PSO UK Limited | Information & communication | 2007 |
| PSP Incineration Limited | Administrative & support | 2002 |
| Psybasec Consulting Limited | Information & communication | 2017 |
| Psychiatric and Psychological Consultant Services Limited | Health & social care | 1988 |
| PT3 Limited | Administrative & support | 2016 |
| Publicard Ltd | Wholesale & retail | 2020 |
| Pubsub Global Services Ltd | Information & communication | 2015 |
| Pugatch Consilium Limited | Professional & scientific | 2006 |
| Pullen Power Ltd | Administrative & support | 2023 |
| Puppy Tools Ltd | Information & communication | 2026 |
| Purple Marketing and Design Limited | Administrative & support | 2009 |
| Purr & Paws Ltd | Wholesale & retail | 2025 |
| Pursuit Racing Limited | Wholesale & retail | 2020 |
| PW Resistance Welding Products Limited | Manufacturing | 1984 |
| PWF Building Services Limited | Construction | 2011 |