| Prestige Left Hand Drive Ltd | Wholesale & retail | 2018 |
| Prestige Platinum Automotive Limited | Wholesale & retail | 2025 |
| Pretty Little Prom Limited | Wholesale & retail | 2024 |
| Pretty Properties NE Ltd | Real estate | 2019 |
| Pretty Wild Seeds Limited | Wholesale & retail | 2021 |
| PRG Ltd | Professional & scientific | 2015 |
| Price W Sowerby Ltd | Wholesale & retail | 2026 |
| Price Work Construction Ltd | Construction | 2025 |
| Priestgate Bardfield Limited | Administrative & support | 2014 |
| Priestgate Morley (Grid Land) Limited | Real estate | 2011 |
| Priestgate Services (NO. 26) Limited | Real estate | 1984 |
| Priestgate Transactions Limited | Professional & scientific | 2000 |
| Primary Healthcare Darlington Limited | Health & social care | 2014 |
| Primax Hub Ltd | Wholesale & retail | 2025 |
| Prime Boilers Ltd | Construction | 2020 |
| Prime Cleaning Commercial Ltd | Administrative & support | 2026 |
| Prime Cleaning Group Ltd | Administrative & support | 2024 |
| Prime Lens Media Ltd | Information & communication | 2015 |
| Prime Property by Daniel Jeffs Ltd | Construction | 2025 |
| Prime Select Properties Ltd | Real estate | 2025 |
| Primo Marine UK Ltd | Professional & scientific | 2018 |
| Primrose Holidays Limited | Administrative & support | 2026 |
| Primrose Leisure Group Ltd | Administrative & support | 2023 |
| Print Copy Scan Ltd | Other services | 2010 |
| Printwell (North East) Ltd | Manufacturing | 2003 |
| Printwell Digital Ltd | Manufacturing | 2014 |
| Prism Business Consulting Limited | Professional & scientific | 2006 |
| Pristinewhite Cleaning Solutions Ltd | Professional & scientific | 2024 |
| Private Orthoptics Ltd | Health & social care | 2023 |
| Private Studio Limited | Other services | 2023 |
| Pro Booking Systems Ltd | Information & communication | 2013 |
| Pro Darlington & Durham Limited | Manufacturing | 2024 |
| Pro Moves NE Ltd | Transport & logistics | 2023 |
| Pro Shield Home Improvements Ltd | Construction | 2019 |
| Pro-Actif Communications Limited | Information & communication | 1998 |
| Pro-Operation Limited | Professional & scientific | 2024 |
| Proassemble Ltd | Construction | 2025 |
| Process and Systems Consulting - Rail Limited | Professional & scientific | 2017 |
| Process Safety Engineering Ltd | Professional & scientific | 2018 |
| Profab Engineering Limited | Manufacturing | 2021 |
| Profab Site Services Ltd | Construction | 2023 |
| Professional & Coliving Ltd | Real estate | 2021 |
| Professional Catalyst Refiners Ltd | Water & waste | 2012 |
| Progress 2019 Limited | Financial services | 2018 |
| Progress Corp Ltd. | Construction | 2016 |
| Progress Outdoor Ltd | Construction | 2018 |
| Proheat Engineering Limited | Construction | 2021 |
| Project Bridal Designer Outlet Limited | Wholesale & retail | 2015 |
| Project Kite Limited | Administrative & support | 2015 |
| Project Nomad Limited | Administrative & support | 2023 |
| Project TA Limited | Professional & scientific | 2013 |
| Prometheus Business Services Limited | Real estate | 2018 |
| Proper Panda Limited | Information & communication | 1999 |
| Property & Landscaping Services Limited | Real estate | 2012 |
| Property Elevations Ltd | Real estate | 2021 |
| Property Exchange (Darlington) Ltd | Real estate | 2017 |
| Property Exchange (UK) Limited | Real estate | 2013 |
| Property Hunter North East Ltd | Real estate | 2020 |
| Property Hunter Roofing Ltd | Construction | 2021 |
| Property M.J Ltd | Real estate | 2014 |
| Prorex Ltd | Wholesale & retail | 2022 |
| Prospect Lead GEN Ltd | Professional & scientific | 2024 |
| Prosper Events Limited | Extraterritorial | 2019 |
| Prospero Growth Limited | Financial services | 2014 |
| Prosprayuk Limited | Other services | 2022 |
| Protech OS Ltd | Information & communication | 2026 |
| Protection Design & Commissioning Services Ltd | Professional & scientific | 2026 |
| Proteq (Northern) Holdings Limited | Financial services | 2021 |
| Proteq (Northern) Limited | Construction | 1995 |
| Proteq Northern Developments Limited | Construction | 2024 |
| Proteq Northern Lettings Limited | Real estate | 2024 |
| Protoflight Engineering Ltd | Manufacturing | 2017 |
| Provault Construction Services Ltd | Construction | 2026 |
| Prpd Property Renovation Ltd | Construction | 2024 |
| Pryme Tyme Care Service Ltd | Public administration | 2025 |
| PS Motors Ltd | Wholesale & retail | 2021 |
| Psalm 23 Ltd | Administrative & support | 2022 |
| Psjs Engineering Ltd | Professional & scientific | 2018 |
| Psych VA Ltd | Public administration | 2022 |
| Psychology for Children Limited | Education | 2023 |
| PT Active Limited | Education | 2025 |
| PT Executive Limited | Administrative & support | 2009 |
| PT Landscapes Ltd | Other services | 2013 |
| Pukalo Ltd | Transport & logistics | 2022 |
| Pukis Trans Ltd | Transport & logistics | 2014 |
| Pukka-J Limited | Information & communication | 2001 |
| Purdiee Limited | Wholesale & retail | 2025 |
| Pure Payment Solutions Ltd | Administrative & support | 2019 |
| Pure-Edm Limited | Manufacturing | 2001 |
| Purewal (KK) Investment Ltd | Real estate | 2019 |
| Purewal Superstores Ltd | Hospitality | 2015 |
| Purgato Services Limited | Administrative & support | 2022 |
| Purple Diamond Chinese Restaurant Limited | Hospitality | 2019 |
| Purple Events 2023 Ltd | Hospitality | 2023 |
| Purple Griffon Limited | Professional & scientific | 2002 |
| Purple Tree Properties Limited | Real estate | 2020 |
| Purti Darmore Ltd | Wholesale & retail | 2020 |
| Puzzle Business Solutions Ltd | Administrative & support | 2025 |
| Puzzle Education Limited | Professional & scientific | 2025 |
| PVJ Services Ltd | Administrative & support | 2020 |