| Property by JJ Limited | Real estate | 2026 |
| Property Development & Investment Group Ltd | Construction | 2023 |
| Property Investment (NE) Limited | Administrative & support | 2016 |
| Property MG Ltd | Real estate | 2026 |
| Property of AW Limited | Real estate | 2023 |
| Property Preservation Solutions Limited | Construction | 2025 |
| Property Roomer Ltd | Real estate | 2017 |
| Prosafe Technology Limited | Other services | 2019 |
| Proserve (NE) Limited | Construction | 2020 |
| Proserve North East Ltd | Manufacturing | 2024 |
| Protectus Ltd | Financial services | 2022 |
| Protex (UK) Systems Limited | Professional & scientific | 2011 |
| Protex Financial Ltd | Financial services | 2019 |
| Protrax Ltd | Professional & scientific | 2014 |
| Provenance Films Ltd | Information & communication | 2012 |
| Provision Strategy Ltd | Professional & scientific | 2026 |
| Provulc Limited | Manufacturing | 2014 |
| Proxima Corporate Services Limited | Administrative & support | 2026 |
| PRS Electrical Consultants Limited | Professional & scientific | 2015 |
| PS Atex Services Limited | Professional & scientific | 2013 |
| PS Industrial Ltd | Professional & scientific | 2021 |
| PS Properties NE Ltd | Administrative & support | 2025 |
| PS79 Engineering Solutions Limited | Professional & scientific | 2019 |
| PSE Mechanical Solutions Ltd | Professional & scientific | 2026 |
| PSG Wealth Management Ltd | Financial services | 2018 |
| PSK & MSK Holdings Ltd | Real estate | 2026 |
| PT Handyman Ltd | Manufacturing | 2021 |
| PTP Creative Ltd. | Real estate | 2019 |
| PTS Environmental Limited | Water & waste | 2019 |
| Public House Durham Ltd | Hospitality | 2019 |
| Puddleducks 106 Ltd | Education | 2012 |
| Punch Robson LLP | | 2017 |
| Punky Paws Ltd | Agriculture & fishing | 2026 |
| Punt Media Ltd | Information & communication | 2026 |
| Puraglow Cosmetics Ltd | Wholesale & retail | 2021 |
| Pure Luxury (NE) Ltd | Wholesale & retail | 2020 |
| Pure Property Maintenance (NE) Ltd | Administrative & support | 2022 |
| Pureglo Ltd | Wholesale & retail | 2025 |
| Purely Balanced Ltd | Health & social care | 2018 |
| Purple COW Properties Ltd | Real estate | 2026 |
| Purple Lets Ltd | Real estate | 2020 |
| Purple Octopus Limited | Real estate | 2024 |
| Purple Rose Stockton CIC | Education | 2023 |
| Purple Sage (London) Limited | Construction | 2014 |
| Purple Trees Consulting Ltd | Professional & scientific | 2020 |
| Putney Pantry Limited | Hospitality | 2014 |
| PV Premier Limited | Professional & scientific | 2024 |
| PW Logistics NE Ltd | Transport & logistics | 2014 |
| PW Power Projects Limited | Professional & scientific | 2014 |
| PWB NE Ltd | Construction | 2023 |
| PWP Scaffolding Services Limited Limited | Construction | 2019 |
| Q Media Marketing Ltd | Professional & scientific | 2024 |
| Q&S Short Stays Ltd | Hospitality | 2022 |
| Q.T.S. (UK) Limited | Manufacturing | 1999 |
| Q76 Capital Management LLP | | 2022 |
| Qas’Tia Ltd | Health & social care | 2023 |
| Qazy Grill Restaurant Ltd | Hospitality | 2026 |
| QED Procurement Services Limited | Professional & scientific | 2019 |
| QEF Trading Limited | Wholesale & retail | 1967 |
| QIS Construction Limited | Administrative & support | 2010 |
| Qisan Ltd | Professional & scientific | 2003 |
| QRS Vertical Limited | Manufacturing | 2020 |
| QS Electrical Ltd | Construction | 2020 |
| Quacked Spines CIC | Wholesale & retail | 2024 |
| Quantify North East Limited | Professional & scientific | 2026 |
| Quantipro Services Limited | Professional & scientific | 2023 |
| Quantom DRV Ltd | Transport & logistics | 2023 |
| Quantum Edge Holdings Limited | Financial services | 2025 |
| Quantum Edge Properties Limited | Real estate | 2026 |
| Quantum Edge R&D Ltd | Administrative & support | 2011 |
| Quay Corner Ltd | Hospitality | 2023 |
| Qudos Recruitment Ltd | Administrative & support | 2023 |
| Qudsia Tahir Ltd | Wholesale & retail | 2025 |
| Que's Sunderland Ltd | Hospitality | 2025 |
| Quick Hand Carwash (NE) Limited | Administrative & support | 2025 |
| QUICK24 Accounting Services Limited | Professional & scientific | 2021 |
| Quicker Stitch Limited | Manufacturing | 2010 |
| Quickly Group Holdings Limited | Professional & scientific | 2012 |
| Quince Properties Group Limited | Real estate | 2025 |
| Quince Technologies Limited | Information & communication | 2013 |
| R & S Finn Properties Limited | Real estate | 2023 |
| R 2 B Media Limited | Information & communication | 2002 |
| R Allan Power Services Limited | Energy | 2016 |
| R Burnside Limited | Other services | 2010 |
| R Campbell & Sons Limited | Wholesale & retail | 2001 |
| R D Illingworth Limited | Construction | 2022 |
| R G Macfarlane Ltd | Wholesale & retail | 2016 |
| R M G Commercial Services Ltd | Professional & scientific | 2012 |
| R M H Services Ltd | Manufacturing | 2022 |
| R Morton Davies Logistics Ltd | Transport & logistics | 2025 |
| R&J Cleaning Services Ltd | Administrative & support | 2021 |
| R&P Investments (FIR Tree) Ltd | Construction | 2016 |
| R-Tech Dental Ceramics Ltd | Health & social care | 2025 |
| R. Simon (Dryers) Limited | Wholesale & retail | 1991 |
| R.Blakemore Logistics Ltd | Transport & logistics | 2026 |
| R.D Inspection Services Limited | Professional & scientific | 2019 |
| R.M.W Telecommunications Ltd | Administrative & support | 2021 |
| R.O Surfaces Limited | Construction | 2017 |
| R2A Management Limited | Real estate | 2024 |
| RA Auto PVT Limited | Wholesale & retail | 2025 |