| Profiglass Ltd | Construction | 2025 |
| Profundo BLU Marine Limited | Professional & scientific | 2023 |
| Progline Limited | Wholesale & retail | 2021 |
| Progonati Limited | Hospitality | 2026 |
| Progress 55 Ltd | Information & communication | 2026 |
| Progressive Advisory Ltd | Professional & scientific | 2022 |
| Progresstracker Ltd | Manufacturing | 2015 |
| Prohibition Distillery Ltd | Manufacturing | 2021 |
| Prohibition Newcastle Limited | Hospitality | 2015 |
| Project Advisors International Ltd | Professional & scientific | 2021 |
| Project Alpine Bidco Limited | Financial services | 2022 |
| Project Alpine Topco Limited | Financial services | 2022 |
| Project Barrel Limited | Hospitality | 2022 |
| Project Canopy Bidco Limited | Financial services | 2025 |
| Project Canopy Midco Limited | Financial services | 2025 |
| Project Canopy Topco Limited | Financial services | 2025 |
| Project Commonplace CIC | Professional & scientific | 2025 |
| Project Construction NE Limited | Construction | 2025 |
| Project Dinner Party Limited | Hospitality | 2018 |
| Project Galaxy UK Bidco Limited | Financial services | 2021 |
| Project Galaxy UK Midco Limited | Financial services | 2021 |
| Project Galaxy UK Topco Limited | Financial services | 2021 |
| Project Gosforth Limited | Real estate | 2022 |
| Project Jesmond Ltd | Hospitality | 2017 |
| Project Management People Limited | Administrative & support | 2019 |
| Project Nicholas Limited | Real estate | 2021 |
| Project North Geomatics Ltd | Professional & scientific | 2022 |
| Project North Property Ltd | Real estate | 2024 |
| Project Padel Ltd | Arts & recreation | 2023 |
| Project Pizza and Wine Ltd | Hospitality | 2025 |
| Project Zebedee Bidco Limited | Financial services | 2026 |
| Project Zebedee Midco Limited | Financial services | 2026 |
| Project Zebedee Topco Limited | Financial services | 2026 |
| Projectfuture Property Management Limited | Households | 1989 |
| Projector Brand Communications Holdings Limited | Financial services | 2021 |
| Projector Brand Communications Limited | Professional & scientific | 2003 |
| Prolac Ltd | Wholesale & retail | 2024 |
| Prolific Industries 2 Limited | Administrative & support | 2025 |
| Prolific Industries 3 Limited | Health & social care | 2025 |
| Prolific Industries 4 Limited | Health & social care | 2026 |
| Prolific Industries Limited | Health & social care | 2019 |
| Prom Motors Limited | Wholesale & retail | 2025 |
| Promethean Media Ltd | Professional & scientific | 2025 |
| Promethean Play Ltd | Professional & scientific | 2021 |
| Prometheus Advanced Materials and Recycling Ltd | Manufacturing | 2025 |
| Prometheus Analytics (AI) Limited | Real estate | 2021 |
| Promise Events Ltd | Hospitality | 2025 |
| Promised Land Housing Limited | Real estate | 2022 |
| Promo Powerhouse Ltd | Professional & scientific | 2024 |
| Promovere Projects Ltd. | Professional & scientific | 2014 |
| Prompt Technology Services Ltd | Wholesale & retail | 2015 |
| Proofgolden (Holdings) Limited | Administrative & support | 2015 |
| Proofgolden (Properties) Holdings Limited | Extraterritorial | 2016 |
| Proofgolden (Properties) Limited | Extraterritorial | 2016 |
| Propacush Ltd | Wholesale & retail | 2022 |
| Property by Ramsey Ltd | Real estate | 2021 |
| Property Circle Limited | Real estate | 2004 |
| Property Dynamics International Ltd | Real estate | 2021 |
| Property Globe Limited | Real estate | 2025 |
| Property Holdings (North East) Limited | Real estate | 2025 |
| Property Hub Newcastle Ltd | Real estate | 2023 |
| Property Investment (North East) Limited | Real estate | 2018 |
| Property Investment NE580 Limited | Real estate | 2021 |
| Property Invez Limited | Real estate | 2019 |
| Property Maintenance & Repairs Ltd | Construction | 2024 |
| Property Matters NE Ltd | Real estate | 2025 |
| Property MGB Limited | Real estate | 2024 |
| Property Motion Ltd | Administrative & support | 2016 |
| Property Projects (NE) Limited | Construction | 2013 |
| Property Providence Ltd | Real estate | 2019 |
| Property Refurbs North East Ltd | Manufacturing | 2020 |
| Property Rung Limited | Real estate | 2017 |
| Property Search North East Limited | Information & communication | 2013 |
| Property Service NE Limited | Construction | 2023 |
| Property Services NCL Limited | Households | 2025 |
| Property Services North East Ltd | Real estate | 2021 |
| Property Shop Lettings Sales & Management Limited | Real estate | 2018 |
| Property Spaces Limited | Real estate | 2015 |
| Property Stop Lettings Sales & Management Limited | Real estate | 2018 |
| Property Viewer Ltd | Information & communication | 2023 |
| Propertykleenuk Nationwide Limited | Administrative & support | 2025 |
| Propertymark (North East) Ltd | Real estate | 2025 |
| Propery Management Services Limited | Real estate | 2026 |
| Prosa Batter Ltd | Manufacturing | 2025 |
| Prosol Services Limited | Extraterritorial | 2008 |
| Prospect Builders N.E Ltd | Construction | 2010 |
| Prospect NCL Limited | Real estate | 2022 |
| Prosper Investments NE Ltd | Real estate | 2023 |
| Prosper Learning Trust | Education | 2017 |
| Prosper Procurement Limited | Other services | 2008 |
| Prosperity Real Estate Limited | Real estate | 2023 |
| Prostark Homes Ltd | Construction | 2020 |
| Prostayaccommodation Ltd | Hospitality | 2025 |
| Prosub Property Limited | Real estate | 2023 |
| Protec Plastics Limited | Extraterritorial | 2011 |
| Protec the CAP Company Limited | Wholesale & retail | 1993 |
| PROTECT365 Limited | Financial services | 2018 |
| PROTECT365 Wills and Estate Planning Ltd | Other services | 2019 |
| Protected Asset Limited | Professional & scientific | 2013 |
| Protein POD Vending Solutions Ltd | Wholesale & retail | 2022 |