| Planet Empire Limited | Wholesale & retail | 2022 |
| Planet Stores Ltd | Wholesale & retail | 2018 |
| Platford Green Consultancy Limited | Professional & scientific | 2022 |
| Platinum Developers Ltd | Construction | 2026 |
| Platinum World Productions Ltd | Information & communication | 2025 |
| Playrise | Education | 2025 |
| Playschool Limited | Health & social care | 2023 |
| Plumb Jobs Limited | Administrative & support | 2005 |
| Plumbix Ltd | Construction | 2026 |
| Plume Publications Ltd | Information & communication | 2025 |
| Plunkfish Limited | Wholesale & retail | 2013 |
| Plusone Medical Ltd | Health & social care | 2015 |
| Pluspoint Recruitment Limited | Other services | 2016 |
| Plusstep Ltd | Transport & logistics | 2019 |
| PM + CM LLP | | 2017 |
| Pmafitness Limited | Arts & recreation | 2015 |
| Pmbprojects Ltd | Information & communication | 2017 |
| PMO Construction Ltd | Construction | 2026 |
| Pmrm Limited | Transport & logistics | 2022 |
| PNP Residential Ltd | Real estate | 2022 |
| Poken Productions Limited | Administrative & support | 2010 |
| Polain Bookkeeping Services Limited | Professional & scientific | 2023 |
| Pole Star Gallery Ltd | Arts & recreation | 2017 |
| Poppy Bloom Limited | Health & social care | 2024 |
| Port West Consultants Ltd | Professional & scientific | 2023 |
| Portfolio Luxe Ltd | Wholesale & retail | 2017 |
| Poseandprints Ltd | Professional & scientific | 2024 |
| Poskitt Practice Management Ltd | Administrative & support | 2023 |
| Potton Property Management Ltd | Real estate | 2026 |
| POW Surbiton Limited | Hospitality | 2026 |
| Powell Creative Installs Limited | Manufacturing | 2026 |
| Power ARC Limited | Construction | 2025 |
| Power Builders & Construction Ltd | Construction | 2025 |
| Power Electrical Solutions (UK) Ltd | Construction | 2021 |
| Power PAY Services Limited | Administrative & support | 2024 |
| PPH London Ltd | Construction | 2023 |
| Ppsp Commercial Limited | Real estate | 2023 |
| Ppsp Properties Limited | Real estate | 2022 |
| PR Marshall Consulting Limited | Professional & scientific | 2021 |
| Practice Money Limited | Professional & scientific | 2007 |
| PRADA11 Limited | Real estate | 2021 |
| Pramukham Ltd | Real estate | 2016 |
| Pravaaha Lucis UK Limited | Administrative & support | 2025 |
| Praxis IT Limited | Information & communication | 1998 |
| Precious Children Services Limited | Other services | 2017 |
| Precision Accounting Solutions Ltd | Professional & scientific | 2020 |
| Precision Flooring Services Limited | Construction | 2018 |
| Precision Panel Products Ltd | Wholesale & retail | 2022 |
| Precision Plywood Panels Ltd | Wholesale & retail | 2022 |
| Premear Care Ltd | Health & social care | 2024 |
| Premier Electrical and Data Services Ltd | Construction | 2017 |
| Premier Lifting & Engineering Services Limited | Real estate | 2000 |
| Premier Lifts Limited | Construction | 1987 |
| Premier Mortgages and Protection Limited | Administrative & support | 2019 |
| Premier Properties Sales & Lettings Ltd | Real estate | 2015 |
| Premier Recruit Ltd | Administrative & support | 2019 |
| Premier Solar Ltd | Construction | 2023 |
| Prep and Glow Wellness Studio Ltd | Other services | 2020 |
| Pressing Matters (Leigh-On-Sea) Ltd | Administrative & support | 2025 |
| Prestige County Events Ltd | Administrative & support | 2022 |
| Prestige Sales Solutions Ltd | Professional & scientific | 2025 |
| Pride of Hornchurch Ltd | Hospitality | 2015 |
| Priestwood House LLP | | 2016 |
| Primal Homes Ltd | Real estate | 2022 |
| Prime Access Group Ltd | Wholesale & retail | 2026 |
| Prime Cleanroom Solutions Ltd | Construction | 2023 |
| Prime Drylining Ltd | Construction | 2025 |
| Prime Endeavor Limited | Administrative & support | 2014 |
| Prime Facilities Limited | Construction | 2017 |
| Prime Gadgets Ltd | Wholesale & retail | 2026 |
| Prime Serviced Accommodations Ltd | Real estate | 2021 |
| Prime SM Plumbing Ltd | Construction | 2026 |
| Primebuild Partners Ltd | Construction | 2024 |
| Primechain Global Limited | Information & communication | 2022 |
| Primeprospectai Ltd | Professional & scientific | 2025 |
| Primespace Developments Limited | Real estate | 2026 |
| Primetech Computer Services Limited | Information & communication | 1997 |
| Prior Financial Management Ltd | Professional & scientific | 2022 |
| Prism Insights UK Limited | Real estate | 2014 |
| Pristine GAS Ltd | Construction | 2022 |
| Priya Hair & Beauty Ltd | Other services | 2026 |
| PRJ Holdings Ltd | Real estate | 2020 |
| Pro Fitting Services Ltd | Construction | 2020 |
| Pro Loft Limited | Construction | 2023 |
| Pro Maintenance Limited | Construction | 2015 |
| Pro Plumbing & Heating Services Ltd | Construction | 2017 |
| Pro Rate Cleaning Ltd | Administrative & support | 2023 |
| Pro Trade Supplies Limited | Other services | 2014 |
| Proactive Installations Ltd | Construction | 2024 |
| Proconnect Talent Ltd | Administrative & support | 2025 |
| Procyon Investments Limited | Real estate | 2019 |
| Product Range Limited | Wholesale & retail | 2018 |
| Production Support Limited | Administrative & support | 2022 |
| Profectus Property Investments Ltd | Real estate | 2021 |
| Professional Connections Limited | Other services | 1993 |
| Profit Setters Ltd | Professional & scientific | 2024 |
| Progress Lifts Ltd | Construction | 2020 |
| Projectsmart Ltd | Construction | 2025 |
| Projman Consultancy Ltd | Construction | 2011 |
| Projxic Synergy Asset & Liquidity Management UK Ltd | Financial services | 2025 |