| Pierce Bridge Biomass Fuels Number 2 Limited | Wholesale & retail | 2023 |
| Piercebridge Grange Management Limited | Administrative & support | 2007 |
| Pikedawn Limited | Administrative & support | 1997 |
| Pimm's and Needles Teesside CIC | Other services | 2023 |
| Pink Sundays Limited | Wholesale & retail | 2022 |
| Pinkyred Ltd | Wholesale & retail | 2015 |
| Pinnacle Auto Engineering Limited | Manufacturing | 2019 |
| Pinnacle Property Ventures (NE) Limited | Professional & scientific | 2025 |
| Pinpin Ltd | Arts & recreation | 2013 |
| Pinpoint Electrical Services Limited | Construction | 2020 |
| Pipe Maintenance International Limited | Mining & quarrying | 2013 |
| Pipeline & Project Services Ltd | Professional & scientific | 2020 |
| Pivot Point Supported Accommodation Limited | Health & social care | 2025 |
| Pixel Helix Limited | Information & communication | 2024 |
| Pizza Box N Ltd | Hospitality | 2025 |
| Pizza Cono Limited | Hospitality | 2019 |
| Pizza Darlo Hawra Limited | Hospitality | 2019 |
| Pizza Darlo NZA Ltd | Hospitality | 2025 |
| Pizza Hot and Catering Ltd | Hospitality | 2024 |
| Pizza Master (NE) Ltd | Hospitality | 2022 |
| Pizza Master (NTH) Limited | Hospitality | 2024 |
| Pizza Palace NE Ltd | Hospitality | 2024 |
| Pizza Palace Takeaway Ltd | Hospitality | 2025 |
| Pizza Station Darlington Ltd | Hospitality | 2023 |
| Pizza Town NE Ltd | Hospitality | 2024 |
| Pizzeria 36 Ltd | Hospitality | 2025 |
| PJ Hardinge & SON Ltd | Administrative & support | 2017 |
| PJB Groundworks (N/E) Ltd | Administrative & support | 2015 |
| PJR Groundworks & Construction Ltd | Construction | 2019 |
| PK Medical Consultancy Services Ltd | Health & social care | 2019 |
| PKH Event Hire Limited | Other services | 2015 |
| PKL Consulting Limited | Professional & scientific | 2015 |
| Placenta Plus London Ltd | Health & social care | 2019 |
| Planet Leisure (NA) Limited | Arts & recreation | 2011 |
| Plasterboard Recycling Solutions Limited | Water & waste | 2010 |
| Plastic Republic Limited | Manufacturing | 2015 |
| Platform 2 Cafe Ltd | Hospitality | 2025 |
| Platform Perform Ltd | Wholesale & retail | 2020 |
| Platoon Supplies Ltd | Wholesale & retail | 2025 |
| Platt Property Developments Limited | Real estate | 2021 |
| Playscale Ltd | Information & communication | 2026 |
| Playseer Labs Limited | Information & communication | 2026 |
| Playseer Ltd | Information & communication | 2018 |
| PLG 1 Ltd | Financial services | 2024 |
| Plt/Pb Ltd | Manufacturing | 2026 |
| Plucky Duck Properties Ltd | Real estate | 2026 |
| Plus Consulting Career Club CIC | Professional & scientific | 2023 |
| PLUS4UTILITIES Limited | Financial services | 2022 |
| Plutus Property Limited | Real estate | 2016 |
| PLW Fitness Limited | Other services | 2024 |
| PM Digi Ltd | Other services | 2017 |
| Pmbimaging Ltd | Extraterritorial | 2025 |
| PMH Construction Limited | Construction | 2018 |
| PNK Pcrepairs Ltd | Other services | 2026 |
| Pocock Services Limited | Wholesale & retail | 2025 |
| Podium Property Group Ltd | Real estate | 2025 |
| Poison Lounge Ltd | Hospitality | 2024 |
| Polaris Entertainment Ltd | Hospitality | 2018 |
| Pollitt T Limited | Wholesale & retail | 2024 |
| Pollypay Limited | Professional & scientific | 2025 |
| Polo Market Darlington Ltd | Wholesale & retail | 2025 |
| Pomfret Shopfitting Limited | Professional & scientific | 2008 |
| Popcorn North Ltd | Real estate | 2019 |
| Poplar Roofing & Guttering Ltd | Construction | 2025 |
| Poppies Floors Ltd | Construction | 2024 |
| Poppy’S Tubing Ltd | Construction | 2025 |
| Populus Facilities Management Limited | Administrative & support | 2014 |
| Populus Select Ltd | Administrative & support | 2007 |
| Poseidon Trustees Limited | Financial services | 2022 |
| Post House Commercial Ltd | Real estate | 2026 |
| Potts Locksmiths Limited | Manufacturing | 2010 |
| Powell Controls Limited | Professional & scientific | 2018 |
| Power Newco Limited | Financial services | 2022 |
| Power Topco Limited | Wholesale & retail | 2016 |
| Powercare Electrical Services Limited | Construction | 2010 |
| PPC CDM Ltd | Professional & scientific | 2012 |
| PPW Services Ltd | Administrative & support | 2024 |
| PR1 Ltd | Hospitality | 2025 |
| Praesto Consulting Group Ltd | Information & communication | 2017 |
| Praesto Consulting Holdings Ltd | Information & communication | 2026 |
| Praesto Consulting Investments Ltd | Information & communication | 2026 |
| Praesto Consulting UK Ltd | Information & communication | 2007 |
| Prana Cafe Limited | Hospitality | 2017 |
| Pranson Ltd | Construction | 2020 |
| Praxis Workwell Limited | Health & social care | 2018 |
| PRE Coated Steel North Ltd | Wholesale & retail | 2011 |
| Pre-Formed Solutions Limited | Administrative & support | 2015 |
| Precision Building & Maintenance Ltd | Construction | 2020 |
| Precision Engineering Resolutions Limited | Professional & scientific | 2016 |
| Precision IT Consultants Limited | Information & communication | 2019 |
| Precision Project Management (NE) Ltd | Construction | 2025 |
| Premier Builders Partnership (2017) Limited | Construction | 2017 |
| Premier Cell Fit Limited | Manufacturing | 2000 |
| Premier Cling Limited | Manufacturing | 2017 |
| Premier Exhibitions Ltd | Wholesale & retail | 2010 |
| Premier Wills Limited | Other services | 2007 |
| Premiere Licensed Wholesale Limited | Wholesale & retail | 2023 |
| Premium Window Cleaning Ltd | Administrative & support | 2018 |
| Press Engine Limited | Other services | 2019 |
| Prestige Arenas Ltd | Construction | 2020 |