| Pinnacle Sports and Entertainment Limited | Professional & scientific | 2014 |
| Pinpoint Innovations Limited | Professional & scientific | 2022 |
| Pinsafe Limited | Wholesale & retail | 2012 |
| Pintum Properties Limited | Real estate | 2021 |
| Pinus Press Ltd | Information & communication | 2021 |
| Pioneer Power Limited | Energy | 2019 |
| Piotrek Chmurzynski Data Consultant Limited | Information & communication | 2023 |
| Pipe IT Consultancy Limited | Administrative & support | 2022 |
| Pipeline Media UK Ltd | Information & communication | 2025 |
| Pipeline-G.Com Ltd | Administrative & support | 2025 |
| Pipeways Limited | Construction | 1999 |
| Pipir Khan Ltd | Health & social care | 2024 |
| Pishu Commercial Spares Limited | Wholesale & retail | 2007 |
| Pitch Perfect Presentations Limited | Education | 2019 |
| Pitchfork Design Limited | Administrative & support | 2013 |
| Pivotal Innovations Ltd | Information & communication | 2021 |
| Pivotspark Limited | Professional & scientific | 2025 |
| Pixel DOT Design Ltd | Professional & scientific | 2011 |
| Pixel Infinity Ltd | Households | 2021 |
| Pixelpulse Media Ltd | Professional & scientific | 2010 |
| Pixlee Turnto Ltd. | Information & communication | 2019 |
| Pizza Anna Ltd | Hospitality | 2023 |
| PJ & CP Acquisitions Limited | Real estate | 2017 |
| PJ Design Services Limited | Professional & scientific | 2019 |
| PJ Goldsmith Ltd | Health & social care | 2019 |
| PJ Livesey South Limited | Construction | 2001 |
| PJ VR Ltd | Health & social care | 2022 |
| PJ3 Projects Ltd | Information & communication | 2020 |
| PJC Scaffolding Solutions Limited | Construction | 2016 |
| PJH Engineering Solutions Limited | Professional & scientific | 1999 |
| PJP Catalyst Solutions Limited | Manufacturing | 2022 |
| Pjso Limited | Professional & scientific | 2025 |
| PK Engineering Construction Limited | Administrative & support | 2014 |
| PKD Orthodontics Limited | Health & social care | 2011 |
| Pkengineering (UK) Limited | Administrative & support | 2013 |
| PKL Group Limited | Professional & scientific | 1984 |
| PL Avery Limited | Health & social care | 2023 |
| Place Development Consultancy Services Limited | Professional & scientific | 2022 |
| Place Experts Ltd | Professional & scientific | 2016 |
| Place Informatics Ltd | Information & communication | 2008 |
| Placekeeper Management Ltd | Real estate | 2020 |
| Planet DDS UK Limited | Information & communication | 2023 |
| Planetree Estates Limited | Real estate | 2019 |
| Plange Consulting Ltd | Information & communication | 2021 |
| Planit EOT Limited | Extraterritorial | 2022 |
| Planit I.E. Limited | Information & communication | 2013 |
| Planko Ltd | Information & communication | 2022 |
| Plant Sales Direct Limited | Other services | 2007 |
| Plantopia Eco Pulp Ltd | Manufacturing | 2022 |
| Plaster Skin Limited | Wholesale & retail | 2025 |
| Platco Ltd | Information & communication | 2023 |
| Platinum (SRI) Financial Services Ltd | Administrative & support | 2007 |
| Platinum Architecture Limited | Professional & scientific | 2023 |
| Platinum Curry Co Ltd | Hospitality | 2026 |
| Platinum Vehicle Solutions Ltd | Administrative & support | 2016 |
| Plax Limited | Financial services | 2021 |
| Play Virtuoso Group Limited | Education | 2016 |
| Play-Able Sports CIC | Arts & recreation | 2025 |
| Playmaker Gaming Ltd | Information & communication | 2025 |
| Playsap Limited | Information & communication | 2008 |
| PLD Electrical COM Limited | Professional & scientific | 2025 |
| Pledge IAM Solutions Ltd | Information & communication | 2020 |
| Plexis Solutions and Consulting Limited | Information & communication | 2025 |
| Plexus Neurology Ltd | Health & social care | 2023 |
| Plexxity Ltd | Information & communication | 2024 |
| PLL P7 Ltd | Real estate | 2026 |
| Plough and Flail Mobberley Limited | Hospitality | 2019 |
| PLS Holdco Limited | Financial services | 2024 |
| Plum Blossom Catering Ltd | Hospitality | 2022 |
| Plumley Close Estate Limited | Households | 1966 |
| Plural Heaven Limited | Professional & scientific | 1992 |
| Plus + Ltd | Information & communication | 2024 |
| Pluto Data Science Limited | Professional & scientific | 2023 |
| PM (Rochdale Road) Devco Limited | Construction | 2022 |
| PM (Rochdale Road) Holdings Limited | Real estate | 2022 |
| PMB Ventures Limited | Professional & scientific | 2022 |
| Pmor Ltd | Real estate | 2010 |
| Pmpm Solutions Ltd | Information & communication | 2026 |
| PMS 2 Limited | Extraterritorial | 2011 |
| PMU by Vilma Karaliute Ltd | Other services | 2017 |
| PMU Championship Limited | Administrative & support | 2022 |
| PN Design Services Ltd | Professional & scientific | 2016 |
| PNL Worldwide Ltd | Manufacturing | 2018 |
| POD Developments Ltd | Construction | 2017 |
| POD World (Holdings) Limited | Real estate | 2020 |
| Poetry & Prose Consulting Limited | Professional & scientific | 2023 |
| Poke & Wiggle Ltd. | Information & communication | 2026 |
| Poland Securities Ltd | Professional & scientific | 2014 |
| Polar Specialist Coatings Ltd | Wholesale & retail | 2018 |
| Polaris Laboratories U.K. Limited | Administrative & support | 2026 |
| Pole Haus Ltd | Arts & recreation | 2025 |
| Polgooth Village Salon Limited | Other services | 2023 |
| Police Sport UK | Arts & recreation | 2024 |
| Polish Networking Club Ltd | Professional & scientific | 2014 |
| Pollen Perks Limited | Professional & scientific | 2024 |
| Poloplex Limited | Hospitality | 2018 |
| Polruan Property Development Co Ltd | Real estate | 1996 |
| Polygon Labs Services (UK) Ltd | Information & communication | 2022 |
| Polykap Ltd | Information & communication | 2022 |
| Pomelo Properties Limited | Real estate | 2015 |