| Pioneer Minds Ltd | Information & communication | 2016 |
| Pioneer Solution Services Ltd | Construction | 2023 |
| Pipex Communications Services Limited | Information & communication | 1995 |
| Pipex Internet Limited | Information & communication | 2004 |
| Pipex UK Limited | Information & communication | 2000 |
| Pips Property Group Ltd | Real estate | 2025 |
| Pips Tattoos Limited | Other services | 2025 |
| Pisgat TAL Bracknell Ltd | Real estate | 2020 |
| Pisgat TAL Milton Ltd | Real estate | 2020 |
| Pisgat TAL UK Ltd | Real estate | 2020 |
| Pistachio Sweet House Limited | Manufacturing | 2012 |
| Pitsea Estates Ltd | Real estate | 2025 |
| Pittanoor Ltd | Hospitality | 2011 |
| Pivot Facility Solutions Limited | Construction | 2023 |
| Pixata Limited | Information & communication | 2000 |
| Pixel Kicks Limited | Information & communication | 2025 |
| Pixelate Media Ltd | Wholesale & retail | 2021 |
| Pixelpeeking Ltd | Professional & scientific | 2023 |
| PIZZA26 Limited | Hospitality | 2026 |
| Pizzarian Ltd | Hospitality | 2019 |
| Pizzology Manchester Limited | Hospitality | 2019 |
| PJ Concepts Company Ltd | Real estate | 2024 |
| Pjay Associates Ltd | Health & social care | 2018 |
| Pjhcompete Ltd | Construction | 2018 |
| PK Foods Limited | Wholesale & retail | 2021 |
| PL Group Ltd | Wholesale & retail | 2018 |
| PL4T3S Ltd | Wholesale & retail | 2025 |
| Place Holdings Ltd | Financial services | 2020 |
| Place Nominees Ltd | Extraterritorial | 2014 |
| Placefirst Architects Limited | Professional & scientific | 2013 |
| Placefirst Construction Limited | Construction | 2012 |
| Placefirst Holdco Limited | Real estate | 2024 |
| Placefirst Limited | Professional & scientific | 2009 |
| Placefirst Topholdco Limited | Real estate | 2024 |
| Plagesoleil Ltd | Hospitality | 2024 |
| Planet Reds Ltd | Arts & recreation | 2021 |
| Planetmartuk Ltd | Wholesale & retail | 2025 |
| Planetree Advisory Limited | Professional & scientific | 2024 |
| Planisware UK Ltd | Information & communication | 2019 |
| Plankton John Ltd | Information & communication | 2022 |
| Plannex Holdings Limited | Financial services | 2026 |
| Plants Forever Limited | Administrative & support | 2024 |
| Plas Lettings Limited | Real estate | 2019 |
| Plasma - UK Limited | Construction | 2011 |
| Plateit MCR Ltd | Hospitality | 2026 |
| PLATEIT11 Ltd | Hospitality | 2023 |
| Platformx Communications Ltd | Information & communication | 1998 |
| Platinum Comps Limited | Arts & recreation | 2025 |
| Platinum Elec Ltd | Construction | 2018 |
| Platinum Height Ltd | Administrative & support | 2024 |
| Platinum Lengths Hair Extensions Ltd | Other services | 2024 |
| Plativale Ltd | Extraterritorial | 2005 |
| Platt Civil Engineering Ltd | Construction | 2025 |
| Playland Limited | Professional & scientific | 2024 |
| Playland Properties Limited | Real estate | 2026 |
| Playmate.Ai Limited | Administrative & support | 2025 |
| Playtime Salford Ltd | Health & social care | 2025 |
| Pleton Limited | Real estate | 2020 |
| PLI Estates Ltd | Real estate | 2021 |
| PLI Investments Limited | Real estate | 2021 |
| Plinth ‘N’ Platter Co. Ltd | Hospitality | 2026 |
| Pluglink UK Ltd | Wholesale & retail | 2025 |
| Plus EV Tech Ltd | Information & communication | 2022 |
| Plus Minus Equals Ltd | Information & communication | 2021 |
| Plusreach Limited | Real estate | 1988 |
| PM Cleanserv Ltd | Administrative & support | 2025 |
| PMB Battery Technologies UK Ltd | Manufacturing | 2019 |
| PMB. ALL for GOD Business Limited | Information & communication | 2017 |
| PMC Services Limited | Health & social care | 2024 |
| PMK Legal Advisory Ltd | Professional & scientific | 2026 |
| PMR for Landlords Ltd | Construction | 2023 |
| Pmtdc Limited | Construction | 2025 |
| PMW Delivery Services Ltd | Transport & logistics | 2024 |
| PN Move Ltd | Real estate | 2025 |
| PNM Legal Limited | Professional & scientific | 2023 |
| Podken Ltd | Other services | 2023 |
| Point Blank Properties Limited | Other services | 2014 |
| POJ Fire Protection Ltd | Professional & scientific | 2021 |
| Polaris Advisory Services Limited | Professional & scientific | 2025 |
| Pole Star Digital Ltd | Administrative & support | 2015 |
| Pole Star Investments Ltd | Real estate | 2020 |
| Polepark Ltd | Extraterritorial | 1996 |
| Polgrade Co.Limited | Real estate | 1964 |
| Policycon Limited | Information & communication | 2022 |
| Polish Your Prose Ltd | Information & communication | 2021 |
| Pollham Investments Ltd | Real estate | 2006 |
| Polti (UK) Limited | Wholesale & retail | 2007 |
| Polyforge PCS Ltd | Wholesale & retail | 2024 |
| Polygon Post Production Ltd | Information & communication | 2019 |
| Pomegranate Care Ltd | Extraterritorial | 2015 |
| Pomegranate Nursery Ltd | Health & social care | 2015 |
| Pomona Island Brew Co Ltd | Manufacturing | 2017 |
| Pompton Limited | Professional & scientific | 2025 |
| Pond Gate Estate 1 Ltd | Professional & scientific | 2015 |
| Pond Gate Estate 2 Ltd | Professional & scientific | 2015 |
| Pond Gate Estate 3 Ltd | Professional & scientific | 2015 |
| Pond Gate Estate 4 Ltd | Professional & scientific | 2015 |
| Pond Gate Estate 5 Ltd | Professional & scientific | 2015 |
| Ponty Estates Limited | Other services | 2024 |
| Pontywaun Estate Company Limited | Professional & scientific | 2000 |