| Parajuli Food Limited | Hospitality | 2023 |
| Paran Holdings Ltd | Financial services | 2026 |
| Parker & Warne Mechanical Maintenance LP | | 2011 |
| Parker Talent Ltd | Arts & recreation | 2025 |
| Parkway Arts CIC | Arts & recreation | 2025 |
| Parkway Lettings Limited | Real estate | 2009 |
| Passey Plumbing and Heating Ltd | Construction | 2016 |
| Paul Smale Electrical Services Ltd | Construction | 2015 |
| Payne & SON Multi Trade Services Ltd | Construction | 2024 |
| PCD Services London Holding Limited | Real estate | 2025 |
| PCS Commercial Services Limited | Professional & scientific | 2017 |
| Pcsc Holdings Ltd | Real estate | 2024 |
| PDL Property Developments Limited | Real estate | 2024 |
| PDL Property Services Limited | Administrative & support | 2017 |
| Peak Property Investors Ltd | Real estate | 2020 |
| Pembroke Property Holdings Limited | Construction | 2017 |
| Pembrokeshire Powerboat Training Limited | Education | 2016 |
| Pentagon Trading House Ltd | Other services | 2020 |
| Perfectly Wrapped Ltd | Other services | 2024 |
| Perpetual Childcare Limited | Education | 2012 |
| Peter Welch (Motor Engineers) Limited | Wholesale & retail | 2003 |
| Petonex Limited | Transport & logistics | 2011 |
| Petroc Ltd | Mining & quarrying | 2021 |
| Pfeifer Limited | Other services | 2012 |
| PFU Services Ltd | Real estate | 2025 |
| Phias Limited | Professional & scientific | 1995 |
| Phil Bett Consulting Limited | Information & communication | 2014 |
| Philly Studio Ltd | Wholesale & retail | 2023 |
| Phoenix Legacy Ltd | Real estate | 2024 |
| Phone House Limited | Wholesale & retail | 2023 |
| Pin-It USA Ltd | Wholesale & retail | 2025 |
| Pipes-Wires Limited | Professional & scientific | 2013 |
| Pixxel Ltd | Professional & scientific | 2023 |
| Pixxelboxx Limited | Other services | 2016 |
| PJH Construction Ltd | Construction | 2023 |
| PK & RK Properties Limited | Real estate | 2025 |
| PK Sales Limited | Wholesale & retail | 2018 |
| Planabolic Ltd | Wholesale & retail | 2022 |
| Planning for Sustainability Foundation | Professional & scientific | 2012 |
| Plasmidox Ltd | Professional & scientific | 2026 |
| Plastic-I Limited | Information & communication | 2021 |
| Platypus Construction Ltd | Construction | 2025 |
| Ploop Ltd | Information & communication | 2025 |
| Plute Ltd | Real estate | 2025 |
| Plutus 3 Limited | Financial services | 2024 |
| Plutus Operations Limited | Administrative & support | 2024 |
| Plutus OPS Limited | Professional & scientific | 2025 |
| PMA Property Investments Ltd | Real estate | 2024 |
| POD20 Ltd | Professional & scientific | 2024 |
| Poise Healthcare Limited | Health & social care | 2013 |
| Polar Skate Co Ltd | Wholesale & retail | 2013 |
| Porpoise of Life Productions Ltd | Information & communication | 2025 |
| Portfolio Commercial Finance Ltd | Professional & scientific | 2024 |
| Power Commissioning South Yorkshire Limited | Professional & scientific | 2024 |
| Prachanda Gati Ltd | Information & communication | 2025 |
| Pramaana Technologies Ltd | Information & communication | 2025 |
| Pranav & Prisha Tilija Limited | Real estate | 2025 |
| Precious Care and Cleaning Company Limited | Health & social care | 2017 |
| Precision Magnetic Technologies Ltd | Manufacturing | 2025 |
| Premier Brickwork Contractors (U.K.) Ltd | Construction | 2020 |
| PREMIER2CARE Limited | Health & social care | 2025 |
| Prestige Lawn Care and Gardens Ltd | Administrative & support | 2026 |
| Previse Events Ltd | Administrative & support | 2014 |
| Prime Connection Properties Ltd | Real estate | 2025 |
| Prime Estates Group Ltd | Real estate | 2025 |
| Primebrick Properties Ltd | Real estate | 2025 |
| Primecookout Limited | Wholesale & retail | 2021 |
| Primeffect Peptides Ltd | Wholesale & retail | 2025 |
| Printworx UK Limited | Manufacturing | 2017 |
| Prior Court Residents Company Limited | Households | 2009 |
| Private Hire Leasing Ltd | Administrative & support | 2023 |
| Pro Cleaners Ltd | Administrative & support | 2024 |
| Proceurope Limited | Professional & scientific | 2019 |
| Prodart Limited | Administrative & support | 2023 |
| Proelec Installations Limited | Construction | 2005 |
| Progressive Option Limited | Professional & scientific | 2010 |
| Project Northmoor Limited | Education | 2020 |
| Project X Adventures Limited | Wholesale & retail | 2013 |
| Projectd Limited | Information & communication | 2017 |
| Propco Group Limited | Financial services | 2023 |
| Property Secure Ltd | Real estate | 2024 |
| Proskills Global Limited | Administrative & support | 2016 |
| Protero Tax Limited | Professional & scientific | 2020 |
| Pryors Corporate Travel Limited | Transport & logistics | 2020 |
| Prystine Web Solutions Ltd | Information & communication | 2020 |
| Psalmy Exclusive Ltd | Manufacturing | 2025 |
| Pubmarc Limited | Hospitality | 2021 |
| Purdy's Paws Ltd | Other services | 2024 |
| Pure Clean (Oxford) Limited | Administrative & support | 2024 |
| Purple Zebra Ltd | Professional & scientific | 2017 |
| Purplebistros Ltd | Hospitality | 2015 |
| Purpose Property Capital Investments Ltd | Real estate | 2025 |
| PVR Solutions Ltd | Other services | 2024 |
| Pyne Planning Limited | Professional & scientific | 2023 |
| Quanta Publishing Ltd | Information & communication | 2022 |
| Quanta Surveying Ltd | Professional & scientific | 2024 |
| Quantarverse Limited | Professional & scientific | 2024 |
| Quantile Energy Ltd | Information & communication | 2024 |
| Quantitative Reality Ltd | Administrative & support | 2017 |
| Quantum Detectors Limited | Professional & scientific | 2005 |