| Myinfinity Group Holdings Ltd | Financial services | 2024 |
| Myinfinity Technologies Limited | Information & communication | 2025 |
| Myson Sevices Ltd | Construction | 2020 |
| N & K Networks Ltd | Manufacturing | 2015 |
| N E D Limited | Construction | 2021 |
| N.F.C Scaffolding Solutions Ltd | Construction | 2025 |
| Nadine Kaikavoosi Ltd | Extraterritorial | 2024 |
| Nana PEG Productions Ltd | Information & communication | 2024 |
| Nani's Barbers Ltd | Other services | 2025 |
| Nannar Stores Ltd | Wholesale & retail | 2017 |
| Nasima Aesthetics Ltd | Other services | 2024 |
| Natalie JT Ltd | Health & social care | 2026 |
| Natholl Properties Ltd | Real estate | 2023 |
| National Engineering Solutions Limited | Administrative & support | 2018 |
| Natural View 360 Ltd | Transport & logistics | 2023 |
| Naturally Doggielicious Treats Ltd | Wholesale & retail | 2024 |
| Navek Electrical Services Ltd | Construction | 2016 |
| Nazia Rahman Limited | Health & social care | 2023 |
| Nbbs International Ltd | Construction | 2025 |
| NC22 Ltd | Professional & scientific | 2022 |
| NCL Wellness Club Ltd | Arts & recreation | 2025 |
| NCS Holdings NE Ltd | Professional & scientific | 2025 |
| ND Rope Access Limited | Construction | 2024 |
| NE Event Hire Ltd | Hospitality | 2023 |
| NE Ground Works Ltd | Administrative & support | 2020 |
| NE LAB Limited | Manufacturing | 2022 |
| NE Pharm Limited | Health & social care | 2017 |
| Nearby Group Limited | Transport & logistics | 2001 |
| Nearby South Tyneside Ltd | Transport & logistics | 2025 |
| Nearby ST Limited | Transport & logistics | 2024 |
| Necollectables Ltd | Wholesale & retail | 2019 |
| Neel's Dine Ltd | Hospitality | 2024 |
| Nefbm Ltd | Agriculture & fishing | 2026 |
| Neil Robertson Marine Services Limited | Construction | 2013 |
| Neils Machining Limited | Manufacturing | 2018 |
| Nelly Beauty Ltd | Other services | 2025 |
| Neugrid Projects Ltd | Wholesale & retail | 1988 |
| New Day Developments Ltd | Real estate | 2023 |
| New Empire Consultancy Ltd | Administrative & support | 2013 |
| New Empire Property Ltd | Real estate | 2019 |
| New Enterprise Studios CIC | Arts & recreation | 2019 |
| New Green Street Deli Limited | Hospitality | 2024 |
| Newcastle Airport Local Authority Holding Company Limited | Professional & scientific | 2000 |
| Newcastle Group Ltd | Households | 2024 |
| Nexa Freight Services Ltd | Transport & logistics | 2025 |
| Next Chapter Properties (NE) Ltd | Real estate | 2026 |
| Next Level Financial Management Limited | Administrative & support | 2002 |
| Nextgen Digital Skills Training Ltd | Education | 2025 |
| NEZ Hoque Locum Limited | Health & social care | 2016 |
| NGF Mechanical Solutions Ltd | Construction | 2026 |
| Nick Huston Consultancy Ltd | Other services | 2017 |
| Niffa Ltd | Health & social care | 2025 |
| Niks Nails Ltd | Other services | 2025 |
| Nimortz Electric Ltd | Wholesale & retail | 2022 |
| Ninamax Ltd | Education | 2014 |
| Nishat Builders Ltd | Construction | 2025 |
| Njhf Ltd | Professional & scientific | 2021 |
| Nokkel Ltd | Construction | 2011 |
| NOM Data Limited | Information & communication | 2025 |
| Nonius Hospitality Technology UK Ltd | Wholesale & retail | 2019 |
| Nook Carpet Centre Limited | Wholesale & retail | 2022 |
| Nord Civils Limited | Construction | 2025 |
| Norfad Developments Ltd | Construction | 2013 |
| North Coast Daylight Ltd | Real estate | 2023 |
| North Coast Removals Ltd | Transport & logistics | 2021 |
| North East Bathroom Supplies Ltd | Wholesale & retail | 2020 |
| North East Canopies Limited | Manufacturing | 1997 |
| North East Cleaning & Maintenance Ltd | Administrative & support | 2014 |
| North East Cleaning Pros Ltd | Administrative & support | 2019 |
| North East Energy Bureau Limited | Administrative & support | 2018 |
| North East Garden Services Limited | Administrative & support | 2024 |
| North East Maritime Trust | Arts & recreation | 2005 |
| North East Offshore Ltd | Administrative & support | 2019 |
| North East Physiotherapy Ltd | Health & social care | 2026 |
| North East Plumbing Ltd | Construction | 2025 |
| North East Psychological Services Limited | Health & social care | 2020 |
| North East Rigging & Lifting Ltd | Construction | 2019 |
| North East Rigging Services Ltd | Professional & scientific | 2023 |
| North East Servicing and Air Conditioning Ltd | Wholesale & retail | 2025 |
| North East Transport Ltd | Wholesale & retail | 2024 |
| North Lizard Livery Limited | Agriculture & fishing | 2020 |
| North Lizard Riding School Limited | Arts & recreation | 2020 |
| North Quay (Albert Edward Dock) Flat Management Company Limited | Real estate | 2017 |
| North Quay (Albert Edward Dock) Management Company Limited | Real estate | 2017 |
| North Sea Explorer Ltd | Agriculture & fishing | 2013 |
| North Star Property Services and Solutions Ltd | Real estate | 2020 |
| Northcol Ltd | Wholesale & retail | 2020 |
| Northeast Linen Ltd | Other services | 2019 |
| Northern Abode Limited | Real estate | 2024 |
| Northern CAM Solutions Limited | Professional & scientific | 2025 |
| Northern Energy Solutions Ltd | Construction | 2010 |
| Northern Fire and Security Ltd | Construction | 2014 |
| Northern Flame Ltd | Construction | 2016 |
| Northern Haul Ltd | Information & communication | 2026 |
| Northern Investment Property Limited | Real estate | 2021 |
| Northern Reach Passenger Transport Limited | Transport & logistics | 2025 |
| Northern Rights (Durham/Tees Valley) Community Interest Company | Other services | 2012 |
| Northern Rights Employee Ownership Trustee Limited | Financial services | 2022 |
| Northern Rights Pathfinder Limited | Administrative & support | 2016 |
| Northern Rights Shared Services Limited | Other services | 2017 |