| Postwork London Limited | Information & communication | 2017 |
| Potash Close Management Limited | Households | 2005 |
| Potluck Media Limited | Information & communication | 2017 |
| Potter Paws Limited | Other services | 2020 |
| Pouch Vault Ltd | Wholesale & retail | 2025 |
| POW Building Services Limited | Construction | 2011 |
| Powdertech (Bicester) Limited | Manufacturing | 1984 |
| Powdertech Limited | Professional & scientific | 1988 |
| Powdertech UK Limited | Financial services | 2014 |
| Power & Integrity CIC | Professional & scientific | 2024 |
| Power Converter Limited | Manufacturing | 2023 |
| Power of a Thousand Limited | Other services | 2022 |
| Power of Posing Ltd | Other services | 2021 |
| Power Park Limited | Real estate | 1995 |
| Power to Enable Limited | Administrative & support | 2015 |
| Powerhouse Performance Club LLP | | 2017 |
| Powerhouse Performance Coaching Limited | Arts & recreation | 2024 |
| Powersafe (South) Ltd | Construction | 2013 |
| Powtropic Ltd | Wholesale & retail | 2025 |
| PPP and S Services Ltd | Health & social care | 2022 |
| PPP Working Solutions Ltd | Professional & scientific | 2008 |
| PR Stories Ltd. | Professional & scientific | 2018 |
| Practical Automation Management Limited | Information & communication | 1980 |
| Pragmatic Maxim Dgsq Ltd | Real estate | 2018 |
| Pragmatic Maxim Properties Limited | Real estate | 2018 |
| Praise Centre Assemblies of GOD Limited | Other services | 2017 |
| Pran Properties Ltd | Real estate | 2025 |
| Pran Services Ltd | Transport & logistics | 2015 |
| Prao Ltd | Hospitality | 2026 |
| Prasha Trading Ltd | Information & communication | 2019 |
| Praviq Limited | Professional & scientific | 2025 |
| Praxis Brands Limited | Financial services | 2026 |
| Praxis Partners Consulting Limited | Professional & scientific | 2020 |
| Prebendal Management (Aylesbury) Limited | Households | 1982 |
| Precious Foundation for Women Children and Adolescents (Pfwca) UK Limited | Health & social care | 2026 |
| Precious Stones Properties Ltd | Real estate | 2021 |
| Precision Abseiling Limited | Construction | 1996 |
| Precision Footcare Ltd | Health & social care | 2025 |
| Precision Glasses Ltd | Manufacturing | 2018 |
| Precision Heating and Plumbing Limited | Households | 2015 |
| Preferred Engineering Ltd | Extraterritorial | 2018 |
| Prefix Pro Limited | Administrative & support | 2015 |
| Premier Brush Co. Limited | Wholesale & retail | 2003 |
| Premier DHL Dental Care Limited | Administrative & support | 2010 |
| Premier Medical Healthcare Limited | Administrative & support | 2020 |
| Premier Transfers Limited | Transport & logistics | 2015 |
| PREMIER24 Healthcare Limited | Administrative & support | 2020 |
| Presley Contracting Limited | Construction | 2023 |
| Prestige Commercial Cleaning Limited | Administrative & support | 2011 |
| Prestige Healthcare PVT Ltd. | Health & social care | 2017 |
| Prestige Homes L.T.D Ltd | Construction | 2022 |
| Prestwood Enterprises Limited | Financial services | 2021 |
| Prestwood Football Club Ltd | Arts & recreation | 2016 |
| Prestwood Football Community CIC | Education | 2025 |
| Pretty Craft Ltd | Wholesale & retail | 2010 |
| Pretty in Preloved Bridal Ltd | Wholesale & retail | 2022 |
| Pretty Posh Beauty Ltd | Other services | 2023 |
| Price Developments Ltd | Real estate | 2024 |
| Price Heritage Ltd | Financial services | 2025 |
| Pricing Penguin Ltd | Information & communication | 2024 |
| Priest END Agriculture Limited | Agriculture & fishing | 2014 |
| Prim Building Services Limited | Administrative & support | 2008 |
| Prima Developments Limited | Construction | 2007 |
| Prima Support Limited | Information & communication | 2020 |
| Primary Outreach Promotions (POP) Ltd. | Education | 2016 |
| Primary Pressure Ltd | Administrative & support | 2024 |
| Prime Care MS Ltd | Health & social care | 2018 |
| Prime CDR Ltd | Construction | 2025 |
| Prime Cuts Club Ltd | Other services | 2026 |
| Prime Electrical Energy Ltd | Construction | 2019 |
| Prime ENG Ltd | Construction | 2018 |
| Prime Global Travel Ltd | Transport & logistics | 2023 |
| Prime Health Plus Ltd | Health & social care | 2023 |
| Prime Tech IT Solutions Ltd | Hospitality | 2016 |
| Primesphere Commerce Ltd | Wholesale & retail | 2026 |
| Primetime Pictures Ltd. | Information & communication | 2014 |
| Prince CA Ltd | Hospitality | 2024 |
| Princes Mead Management Company Limited | Households | 2000 |
| Principality Nannies Ltd | Administrative & support | 2011 |
| Prinradal Limited | Manufacturing | 1975 |
| Print and Design Limited | Administrative & support | 1994 |
| Print and Threadwork Ltd | Manufacturing | 2026 |
| Print Minds Limited | Manufacturing | 2026 |
| Print World Group Limited | Manufacturing | 2021 |
| Prisma Healthcare Ltd | Health & social care | 2019 |
| Pritchards Accountants Ltd | Professional & scientific | 2015 |
| Pritchards Services Limited | Extraterritorial | 2003 |
| Private Car REG UK Limited | Wholesale & retail | 2026 |
| Private Shores Capital and Resorts Ltd | Construction | 2026 |
| Private View Property Limited | Real estate | 2016 |
| Priyanka Pandya.Life Coach Ltd | Health & social care | 2025 |
| Pro Breeze Ltd | Professional & scientific | 2025 |
| Pro Champ Limited | Professional & scientific | 2007 |
| Pro ERA Ltd | Wholesale & retail | 2024 |
| Pro Executive Travel Ltd | Transport & logistics | 2024 |
| Pro Phase Electrical Services Limited | Construction | 2025 |
| Pro Route 1 Logistics Limited | Transport & logistics | 2024 |
| Pro Secure Ltd | Manufacturing | 2019 |
| Pro Touch Clean Ltd | Other services | 2012 |
| Pro Vinci Recoveries Ltd | Professional & scientific | 2022 |