| Pioneer Horizon Labs Ltd | Extraterritorial | 2025 |
| Pioneer Pipework Services Limited | Construction | 2015 |
| Pioneer Plant Hire Limited | Administrative & support | 2024 |
| Pioneer Social Enterprise Ltd | Health & social care | 2011 |
| Pioneeredge Technologies Ltd | Extraterritorial | 2025 |
| Pioneers UK Ministries | Other services | 1994 |
| Pionier Properties Ltd | Real estate | 2023 |
| Piotr Bialkowski Ltd | Transport & logistics | 2014 |
| Piotr Kalita Ltd | Transport & logistics | 2023 |
| Pipco Holdings Limited | Financial services | 2020 |
| Pipe Lining Services Ltd | Administrative & support | 2018 |
| Pipeline Repairs and Maintenance Ltd | Manufacturing | 2020 |
| Pipemore Limited | Administrative & support | 1987 |
| Pipes R Russ Ltd | Construction | 2007 |
| Piripizz Company Ltd | Hospitality | 2025 |
| Pirz Ltd | Wholesale & retail | 2025 |
| Pistoninked Ltd | Other services | 2022 |
| Pitchdeck Productions Ltd | Information & communication | 2023 |
| Pivot Support Ltd | Administrative & support | 2025 |
| Pixel Portal Photography Limited | Professional & scientific | 2015 |
| Pixeldrom Interactive Ltd | Wholesale & retail | 2014 |
| Pixelish Limited | Information & communication | 2026 |
| Pixelwave Digital Ltd | Extraterritorial | 2026 |
| Pixelwave Interactive Ltd | Extraterritorial | 2026 |
| Pixoyo Limited | Extraterritorial | 2013 |
| Pizza 01 Limited | Hospitality | 2025 |
| Pizza 122 Limited | Hospitality | 2026 |
| Pizza 29 Limited | Hospitality | 2026 |
| Pizza 85 Limited | Hospitality | 2025 |
| Pizza Arden Ltd | Hospitality | 2024 |
| Pizza at the Moor Ltd | Hospitality | 2026 |
| Pizza Dale Limited | Hospitality | 2025 |
| Pizza Deals Ltd | Extraterritorial | 2018 |
| Pizza Efes Limited | Hospitality | 2024 |
| Pizza Grill Armthorpe Ltd | Hospitality | 2024 |
| Pizza HAN Limited | Hospitality | 2017 |
| Pizza HAS Limited | Hospitality | 2025 |
| Pizza Hoot Limited | Hospitality | 2024 |
| Pizza Jarrow Limited | Hospitality | 2025 |
| Pizza Link Limited | Hospitality | 2025 |
| Pizza Papa Limited | Hospitality | 2026 |
| Pizza Roma U.K. Ltd | Hospitality | 2018 |
| Pizza Time Pizzeria Limited | Hospitality | 2016 |
| Pizza Top Limited | Hospitality | 2017 |
| Pizza X DON Limited | Hospitality | 2018 |
| Pizza X Flames Limited | Hospitality | 2019 |
| Pizzeria DA Simo Ltd | Hospitality | 2023 |
| Pizzeria Milano U.K. Limited | Hospitality | 2022 |
| PJ Electrical Supplies Limited | Wholesale & retail | 2019 |
| PJ Medics Limited | Health & social care | 2026 |
| PJD Agri Limited | Agriculture & fishing | 2022 |
| PJF Property Ltd | Real estate | 2020 |
| PJH Accountancy Ltd | Professional & scientific | 2013 |
| PJH Engineers Ltd | Wholesale & retail | 2024 |
| PJK Engineering Ltd | Professional & scientific | 2008 |
| PJK Estates Limited | Real estate | 2024 |
| PJM Pro Services Limited | Professional & scientific | 2023 |
| PJR Plant Ltd | Mining & quarrying | 2014 |
| PJW Safety Netting Limited | Construction | 2023 |
| PK Blinds Ltd | Wholesale & retail | 2012 |
| PK Estate & Investments Ltd | Real estate | 2025 |
| PK TM Ltd | Other services | 2020 |
| PKG Developments Ltd | Wholesale & retail | 2023 |
| PKN Burger Ltd | Hospitality | 2024 |
| PKR Limited | Manufacturing | 2000 |
| PL GB Mechanics Ltd | Wholesale & retail | 2019 |
| PL Truck Bodies Ltd | Manufacturing | 2019 |
| Place 1ST Regeneration Limited | Administrative & support | 2017 |
| Placementt Ltd | Education | 2022 |
| Plan IT Pretty Ltd | Wholesale & retail | 2019 |
| PLAN2 Holdings Ltd | Professional & scientific | 2017 |
| Plancadmin Ltd. | Administrative & support | 2020 |
| Planet Tiles Limited | Wholesale & retail | 2017 |
| Planetalpha Holdings Limited | Construction | 2019 |
| Planetalpha Limited | Construction | 1999 |
| Planetwide Digital Ltd | Information & communication | 2021 |
| Planina Balkan Cleaning Ltd | Administrative & support | 2025 |
| Planit Teachers Ltd | Information & communication | 2026 |
| Plant Guard Limited | Administrative & support | 2023 |
| Plant Technologly Services Group Ltd | Manufacturing | 2023 |
| Plant-Fit Group Limited | Professional & scientific | 2015 |
| Plant-Fit Limited | Construction | 2015 |
| Plantability Ltd | Other services | 2017 |
| Plantation Grove Management Company (Doncaster) Limited | Households | 2012 |
| Plantaura CIC | Information & communication | 2023 |
| Plantmetics Ltd | Wholesale & retail | 2024 |
| Plasmatech (UK) Limited | Wholesale & retail | 2017 |
| Plasmatech Online Limited | Wholesale & retail | 1999 |
| Plastering Arts Ltd | Construction | 2021 |
| Plastermaster Construction Limited | Construction | 2011 |
| Plastic Aspects Ltd | Wholesale & retail | 2026 |
| Platesmadesimple Ltd | Manufacturing | 2025 |
| PLATFORM9DEPARTURES Limited | Professional & scientific | 2023 |
| Platinum Accountants and Consultancy Limited | Professional & scientific | 2020 |
| Platinum Electrical Services U.K Ltd | Construction | 2024 |
| Platinum Metals Recycling Ltd | Manufacturing | 2025 |
| Platinum Pro Dance Associates Limited | Education | 2023 |
| Platinum Rail Services Limited | Manufacturing | 2016 |
| Platinum Transport Consultancy Ltd | Professional & scientific | 2021 |
| Platt's Properties Ltd | Real estate | 2025 |