| Pjbros Ltd | Transport & logistics | 2025 |
| PJC Architecture Ltd | Professional & scientific | 2010 |
| PJG Civils Limited | Construction | 2018 |
| PJM Property Investment Ltd | Real estate | 2025 |
| PK Financial Empowerment Limited | Professional & scientific | 2025 |
| PK Furnishings Ltd | Wholesale & retail | 2021 |
| PK Ruminant Nutrition Ltd | Agriculture & fishing | 2011 |
| PKB Engineering Solutions Ltd | Mining & quarrying | 2021 |
| PKB Property Developments Ltd | Real estate | 2024 |
| PKS Retail Ltd | Wholesale & retail | 2024 |
| Pksoft Services Limited | Information & communication | 2019 |
| PLA Express Limited | Wholesale & retail | 2025 |
| Place Hospitality Limited | Hospitality | 2026 |
| Plain Savings Ltd | Financial services | 2014 |
| Plan Digital Limited | Professional & scientific | 2018 |
| Plan Haus Limited | Professional & scientific | 2026 |
| Planafuture Ltd | Financial services | 2005 |
| Plane and Simple Property Maintenance Limited | Construction | 2016 |
| Planet Business Services Limited | Professional & scientific | 2003 |
| Planet Consultancy (Newcastle) Limited | Information & communication | 2012 |
| Planet North Limited | Information & communication | 2005 |
| Planet Pizza (Newbiggin Hall) Ltd | Hospitality | 2024 |
| Planet Place Investments Limited | Real estate | 2025 |
| Planet Properties (Newcastle) Limited | Real estate | 2002 |
| Planning Gain Limited | Real estate | 2013 |
| Plant Hire North East Ltd | Administrative & support | 2024 |
| Plant Power Events UK Ltd | Wholesale & retail | 2025 |
| Plant Services (Gateshead) Limited | Manufacturing | 1967 |
| Planula Limited | Other services | 2024 |
| Planwell Consultancy Limited | Information & communication | 2015 |
| Plaskett Foods Services Limited | Hospitality | 2025 |
| Plastic Skips Limited | Manufacturing | 2025 |
| Plates Delivered Ltd | Wholesale & retail | 2023 |
| Platetovin Ltd | Information & communication | 2022 |
| Platinum Corporate Events (NE) Ltd | Administrative & support | 2022 |
| Platinum Financial Ltd | Financial services | 2018 |
| Platinum Homes (Northern) Limited | Real estate | 2022 |
| Platinum Installs North East Ltd | Construction | 2020 |
| Platinum Property Investment Group Ltd | Real estate | 2021 |
| Platinum Property Team Ltd | Real estate | 2022 |
| Platinum Valeting & Detailing Ltd | Wholesale & retail | 2022 |
| Play Human Ltd | Manufacturing | 2020 |
| Play the Game Limited | Manufacturing | 2022 |
| Playarama Limited | Wholesale & retail | 1980 |
| Playsafe Limited | Other services | 2008 |
| Playtime Paradise Wraparound Ltd | Education | 2002 |
| Plaza Global Estates Ltd | Real estate | 2025 |
| Plaza Opco Ltd | Hospitality | 2024 |
| Plct Ltd | Hospitality | 2023 |
| Pldl Limited | Hospitality | 2025 |
| Pleaseflat Limited | Real estate | 2001 |
| Pleasure Leisure Limited | Administrative & support | 2013 |
| Pleiades of the North East Limited | Wholesale & retail | 2026 |
| Plessey Checks Farming Limited | Agriculture & fishing | 2014 |
| Plews (Durham) Ltd. | Education | 2012 |
| Plinth & Co Ltd | Information & communication | 2026 |
| Plio Education Ltd | Education | 2026 |
| PLM Technical Service Ltd | Professional & scientific | 2013 |
| Plot 5 Estuary Limited | Real estate | 2025 |
| Ploxel Limited | Arts & recreation | 2018 |
| Plpp 2 Limited | Real estate | 2019 |
| Plpp Management Ltd | Administrative & support | 2008 |
| Plsr Ltd | Professional & scientific | 2020 |
| Plucky Duck Engineering Limited | Professional & scientific | 2011 |
| Plum Residential Ltd | Real estate | 2019 |
| Plumbpro (Newcastle) Ltd | Extraterritorial | 2010 |
| Plumbtec (NE) Ltd | Construction | 2023 |
| Plumbtec Supplies Limited | Wholesale & retail | 2020 |
| Plumbwise N. E. Ltd | Manufacturing | 2014 |
| Plus Catalyst Limited | Administrative & support | 2004 |
| Plus Urban Design Ltd | Other services | 2011 |
| Plymouth Citybus Limited | Transport & logistics | 1986 |
| PM Leisure Ltd | Hospitality | 2018 |
| PM Retail Services Ltd | Wholesale & retail | 2020 |
| Pmac Consulting Services Limited | Professional & scientific | 2011 |
| Pmac Mechanical Services Limited | Manufacturing | 2022 |
| Pmag Builders Ltd | Construction | 2025 |
| Pmem Limited | Professional & scientific | 2021 |
| PMF Lets Ltd | Real estate | 2025 |
| PMG Connect Limited | Wholesale & retail | 2025 |
| PMS Management (NE) Ltd | Professional & scientific | 2024 |
| PMS2 (NE) Limited | Hospitality | 2024 |
| PMS3 (NE) Limited | Hospitality | 2024 |
| PMS4 (NE) Limited | Hospitality | 2024 |
| PMS5 (NE) Ltd | Real estate | 2024 |
| Pmsgh Ltd | Financial services | 2025 |
| Pmsk Ltd | Real estate | 2023 |
| PNB Developments Limited | Real estate | 2025 |
| PNB Legals Ltd | Professional & scientific | 2015 |
| Pnpl Limited | Wholesale & retail | 2025 |
| PNY Limited | Hospitality | 2020 |
| Pocc Data Science Limited | Information & communication | 2017 |
| Pocket Health Limited | Information & communication | 2017 |
| Pocket Manager Ltd | Public administration | 2020 |
| POD Newcastle Ltd | Professional & scientific | 2016 |
| POD on the Tyne Limited | Information & communication | 2025 |
| Podcast Master Global Limited | Administrative & support | 2024 |
| Podfo Limited | Health & social care | 2001 |
| Podget Ventures Ltd | Wholesale & retail | 2025 |
| Podiatry Plus Team Valley Limited | Health & social care | 2022 |