| Newgene Diagnostics Ltd | Manufacturing | 2026 |
| Newhaven Court Limited | Professional & scientific | 1990 |
| Newlife.Help Ltd | Administrative & support | 2026 |
| Newlook Global Trading Ltd | Wholesale & retail | 2025 |
| Newscar Group Ltd | Financial services | 2020 |
| Newscar Property Company Limited | Hospitality | 2005 |
| Newstead Motors Ltd | Wholesale & retail | 2026 |
| Newwave Online Ltd | Wholesale & retail | 2026 |
| Nexainc Ltd | Wholesale & retail | 2026 |
| Nexaro Holdings Ltd | Wholesale & retail | 2026 |
| Nexgen Risk Management Software Limited | Information & communication | 2017 |
| Next Step Wellbeing Limited | Other services | 2019 |
| Next Step Wellbeing Monkseaton Limited | Other services | 2023 |
| Next Stop Logistics Limited | Transport & logistics | 2024 |
| Nextgen Developments Ltd | Real estate | 2020 |
| Neza Homes Limited | Real estate | 2021 |
| NFS Medical Limited | Health & social care | 2011 |
| NG Property NE Ltd | Real estate | 2022 |
| NGD 2024 Ltd | Hospitality | 2024 |
| NGP SME Limited | Administrative & support | 2016 |
| NGP Utilities Limited | Administrative & support | 2015 |
| NGU Homelettings Ltd | Real estate | 2008 |
| NGU Homesales Ltd | Real estate | 2008 |
| NGU Property Refurbishments Ltd | Real estate | 2013 |
| NH Brohi Consultants Limited | Health & social care | 2015 |
| NH Brohi Investments Ltd | Real estate | 2021 |
| Nichol & LEE Properties Ltd | Real estate | 2017 |
| Nicholls Transport Limited | Transport & logistics | 1993 |
| Nicholson Nairn Holdings Limited | Professional & scientific | 2017 |
| Nicholson Nairn Limited | Professional & scientific | 2003 |
| Nicholson Signs Ltd | Professional & scientific | 2023 |
| Nicholsons Global Limited | Extraterritorial | 2012 |
| Nicholsons Group Limited | Financial services | 2007 |
| Nicholsons INT Limited | Extraterritorial | 2012 |
| Nichovia Resource Limited | Professional & scientific | 2017 |
| Nick the Greek North East Ltd | Hospitality | 2017 |
| Nico Jonas Ltd | Health & social care | 2020 |
| Nidhera Ltd | Health & social care | 2022 |
| Nidi Investments Ltd | Real estate | 2021 |
| Nidi Limited | Health & social care | 2010 |
| NIH Design Ltd | Professional & scientific | 2023 |
| Nikos Fortis Ltd | Construction | 2026 |
| Nila River Ltd | Professional & scientific | 2017 |
| Ninja Social Ltd | Professional & scientific | 2026 |
| Niobium Ltd | Real estate | 2024 |
| Niran-Swiss Limited | Health & social care | 2025 |
| Nirush Retail Limited | Wholesale & retail | 2022 |
| Nirvani Ltd | Education | 2024 |
| Nitram Properties Limited | Real estate | 2015 |
| Nitro 2 Limited | Professional & scientific | 2011 |
| Nixon Holdings Ltd | Financial services | 2021 |
| Nixon Residential Limited | Real estate | 2022 |
| Niya Medical Services Ltd | Health & social care | 2024 |
| NJ Ventures Limited | Information & communication | 2013 |
| NKW Consultants Ltd | Professional & scientific | 2015 |
| NLP (NE) Ltd | Construction | 2010 |
| NLS Landscaping Limited | Administrative & support | 2025 |
| Nmbc Properties Ltd | Real estate | 2014 |
| Nnemadu Limited | Health & social care | 2023 |
| NO Limits Paintball & Laser Limited | Other services | 2014 |
| NO Limits Performance Ltd | Arts & recreation | 2025 |
| Noble Form Clothing Ltd | Wholesale & retail | 2026 |
| Noble Tycoon Limited | Extraterritorial | 2024 |
| Noble's NE8 Limited | Arts & recreation | 2025 |
| Nobles MOT Centre Limited | Wholesale & retail | 2004 |
| Nohmaan Properties Ltd | Real estate | 2018 |
| Nokomis and BOR Limited | Professional & scientific | 2007 |
| Nonstopbookings Ltd | Information & communication | 2020 |
| Nook Heights Limited | Real estate | 2024 |
| Noor Pharma Investments Ltd | Other services | 2021 |
| Norhav Ltd | Administrative & support | 2023 |
| Norlek Ltd | Professional & scientific | 2017 |
| Norma Foster Limited | Professional & scientific | 2004 |
| Normanby Foods Ltd | Hospitality | 2025 |
| Norse Driving School Ltd | Education | 2023 |
| Nortec Fire Ltd | Construction | 2019 |
| North Base Contracts Ltd | Construction | 2022 |
| North Build Group Limited | Construction | 2026 |
| North Durham Acquisitions Ltd | Administrative & support | 2023 |
| North East (Erdf) Growth Fund Limited Partnership | | 2017 |
| North East (Erdf) Small Loan Fund Limited Partnership | | 2017 |
| North East Access to Finance Limited | Financial services | 2009 |
| North East Air Conditioning Limited | Extraterritorial | 2025 |
| North East Automation Limited | Construction | 2003 |
| North East Bottled GAS Limited | Energy | 2024 |
| North East Care Solution Ltd | Wholesale & retail | 2021 |
| North East Commercial Property Ltd | Real estate | 2004 |
| North East Consultants Ltd | Professional & scientific | 2024 |
| North East CUT Outs Limited | Manufacturing | 1991 |
| North East Developments (Gateshead) Limited | Construction | 2018 |
| North East Devices and Packaging Limited | Wholesale & retail | 2025 |
| North East EAR Care Ltd | Health & social care | 2025 |
| North East Eats Ltd | Professional & scientific | 2021 |
| North East Energy Futures CIC | Professional & scientific | 2026 |
| North East Fasteners Limited | Manufacturing | 2003 |
| North East Finance (Holdco) Limited | Financial services | 2009 |
| North East Finance (Subco) Limited | Financial services | 2009 |
| North East Fuel Ltd | Energy | 2024 |
| North East Headstones and Memorials Limited | Manufacturing | 2023 |
| North East Home Lettings Ltd | Real estate | 2019 |