| Plastic Processing Limited | Financial services | 2022 |
| Platefuls Limited | Wholesale & retail | 2024 |
| Platinum Cars NCL Ltd | Wholesale & retail | 2025 |
| Platinum Electrical Engineering Limited | Construction | 2009 |
| Platinum Lettings Limited | Real estate | 2013 |
| Platinum Pads Ltd | Real estate | 2011 |
| Platypus Media Limited | Professional & scientific | 2019 |
| Plinth House Ltd | Administrative & support | 2017 |
| PLP Associates Limited | Households | 2025 |
| PLR Human Resources Limited | Administrative & support | 2018 |
| Plumbico Plumbing, Heating & Building Services Ltd | Construction | 2021 |
| Plumbing and Heating Supplies Ltd | Wholesale & retail | 2015 |
| Plumbsite Ltd | Extraterritorial | 2012 |
| Plyline North East Ltd | Manufacturing | 2009 |
| PM Strategic Support Limited | Professional & scientific | 2019 |
| Pneumatic Power Source Limited | Other services | 1994 |
| Pocket Money Games Ltd | Information & communication | 2015 |
| POD Xperience Limited | Other services | 2024 |
| Point Break Property Services Limited | Construction | 2021 |
| Point Group Consultancy Ltd | Professional & scientific | 2024 |
| POISED2EXCEL CIC | Health & social care | 2021 |
| Pola Minerals (Holdings) Limited | Administrative & support | 1996 |
| Pola Minerals Limited | Wholesale & retail | 1992 |
| Polished Pups Ltd | Other services | 2022 |
| Polska Szkola Przedmiotow Ojczystych W Newcastle Upon Tyne Ltd | Education | 2024 |
| Polygon Design Ltd | Arts & recreation | 2023 |
| Pondbank Ltd | Construction | 2005 |
| POP YUM Foods Ltd | Manufacturing | 2024 |
| Pop-Up Studio Ltd | Wholesale & retail | 2005 |
| Poppy's Kitchen Food Ltd | Wholesale & retail | 2022 |
| Poptopuk Limited | Information & communication | 2014 |
| Pormic Limited | Financial services | 2023 |
| Pornic Limited | Financial services | 2002 |
| Port Investments North East Ltd | Real estate | 2018 |
| Portland Consulting Engineers Limited | Professional & scientific | 2004 |
| Portland Dodds Brown Ltd | Extraterritorial | 2025 |
| Portrack Test Centre Limited | Wholesale & retail | 2006 |
| Posh Paws Dog Grooming Ltd | Other services | 2024 |
| Posh Pixel Limited | Wholesale & retail | 2023 |
| Positive Futures (North East) Limited | Health & social care | 2025 |
| Positively Charged Limited | Professional & scientific | 2021 |
| Post Operative Wear Limited | Manufacturing | 2025 |
| Potasio Studios Limited | Arts & recreation | 2021 |
| Potts.Offshore Limited | Construction | 2022 |
| Poundbury Dent Ltd | Health & social care | 2025 |
| Powaar Limited | Manufacturing | 2025 |
| Powair Automation Limited | Manufacturing | 1948 |
| Power Bulbs Ltd | Extraterritorial | 2008 |
| Power Bulbs Online Limited | Extraterritorial | 2021 |
| Power Electrics NE Limited | Manufacturing | 2022 |
| Power Print U.K. Limited | Manufacturing | 1991 |
| Powerbase Consulting Ltd | Professional & scientific | 2017 |
| Powergex Limited | Other services | 2019 |
| Powr Parx Limited | Professional & scientific | 2020 |
| PPF Flooring Ltd | Construction | 2021 |
| PPS Newcastle Limited | Construction | 2018 |
| PR Bolting Limited | Mining & quarrying | 2024 |
| PR GAS Services Ltd | Construction | 2017 |
| PR Recruitment and Advertising Ltd | Administrative & support | 2024 |
| Practical Flooring Contracts Ltd | Construction | 2009 |
| Practical Flooring Limited | Transport & logistics | 2002 |
| PRB Construction Ltd | Construction | 2017 |
| PRD Property Management Limited | Real estate | 2015 |
| PRD Transport Services Limited | Transport & logistics | 2005 |
| PRD Warehouse Services Ltd | Administrative & support | 2008 |
| Precious Finds Limited | Wholesale & retail | 2018 |
| Precious Seed Integrated Ltd | Wholesale & retail | 2023 |
| Preciousluxe Ltd | Wholesale & retail | 2025 |
| Precise CUT Limited | Manufacturing | 2013 |
| Precision 2000 Limited | Manufacturing | 1998 |
| Precision Rigging Solutions Ltd | Construction | 2024 |
| Precision Walls & Ceilings Ltd | Construction | 2025 |
| Preferred GAS Ltd | Construction | 2019 |
| Prema Investments Limited | Real estate | 2025 |
| Prema Oral Care Ltd | Health & social care | 2024 |
| Premier Business Services North East Limited | Administrative & support | 2018 |
| Premier Healthcare & Hygiene Ltd | Wholesale & retail | 2005 |
| Premier Maintenance (NE) Limited | Construction | 2020 |
| Premier Paving and Patio Supplies Limited | Manufacturing | 2007 |
| Premier Pipeline Group Limited | Construction | 2024 |
| Premier the Ship Ltd | Wholesale & retail | 2018 |
| Premiership Experience (Asia) Limited | Administrative & support | 2022 |
| Premium Renovations NE Limited | Construction | 2025 |
| Premium Source Luxury Shopping Ltd | Wholesale & retail | 2020 |
| Prerana Ltd | Health & social care | 2021 |
| Pressdome Ltd | Real estate | 2014 |
| Prickly Pear at the Old Brewery Limited | Hospitality | 2007 |
| Prima Holdings Limited | Hospitality | 2006 |
| Prime Commercial Finance UK Limited | Financial services | 2023 |
| Prime Link Estates Ltd | Hospitality | 2026 |
| Prime Solution Services Ltd | Health & social care | 2025 |
| Prime Taxis Gateshead Ltd | Transport & logistics | 2024 |
| Primo Property Services Limited | Construction | 2000 |
| Primula Limited | Manufacturing | 1936 |
| Principal Healthcare Personnel Limited | Administrative & support | 2017 |
| Principal Land & Planning Ltd | Real estate | 2024 |
| Principal Land & Planning Tunbridge Wells Limited | Real estate | 2024 |
| Principled Limited | Professional & scientific | 2022 |
| Print Go Ltd | Professional & scientific | 2024 |
| Print Market Ltd | Manufacturing | 2018 |