| New Key Care Ltd | Agriculture & fishing | 2020 |
| New Key Electrics Ltd | Construction | 2021 |
| New Key Support Ltd | Health & social care | 2014 |
| New Referrals Ltd | Information & communication | 2021 |
| New Royale Pizza Ltd | Hospitality | 2024 |
| New YOU Medispa Limited | Health & social care | 2013 |
| New-World Homes & Properties Limited | Construction | 2023 |
| New-World International Learning Solutions Limited | Wholesale & retail | 2023 |
| Newbiggin Management Company Limited | Households | 2018 |
| Newcastle Diocesan Board of Finance Limited(The) | Other services | 1960 |
| Newcastle Diocesan Education Board | Other services | 1950 |
| Newcastle Diocesan Society | Other services | 1885 |
| Newcastle United Armed Forces Supporters Club CIC | Health & social care | 2024 |
| Newgate Capital Ltd | Real estate | 2025 |
| Newgate Street Management Limited | Real estate | 2018 |
| Nexgen Associates Ltd | Administrative & support | 2023 |
| Next Level Workshops Limited | Education | 2025 |
| NFC - North Sheilds Ltd | Wholesale & retail | 2021 |
| NH Signature Collection Ltd | Real estate | 2026 |
| Nicholls Power Ltd | Construction | 2022 |
| Nicholson Sneakers Limited | Wholesale & retail | 2020 |
| Nick Atkinson Electrical Projects Limited | Construction | 2023 |
| Nico FBA Ltd | Wholesale & retail | 2024 |
| Nicola Gauld Counselling and Therapy Ltd | Health & social care | 2026 |
| Nilverton Limited | Real estate | 2005 |
| Ninja Guardian Ltd | Wholesale & retail | 2023 |
| NO Phone Zone Limited | Wholesale & retail | 2016 |
| NO. 75 Linskill Terrace Management Company Limited | Households | 2014 |
| Nobel Beacon | Administrative & support | 2025 |
| Noddy Entertainment Ltd | Arts & recreation | 2023 |
| Noir ET Blanc Limited | Information & communication | 2006 |
| Nonlinear 1D Limited | Information & communication | 2007 |
| Nootropicana Limited | Health & social care | 2019 |
| Nordfeld Limited | Extraterritorial | 2003 |
| Norfran Plastics Limited | Manufacturing | 1990 |
| Noris Land Limited | Real estate | 2026 |
| Noris Services Limited | Professional & scientific | 2025 |
| North 55 Campers Ltd | Manufacturing | 2023 |
| North Comms Ltd | Information & communication | 2021 |
| North East Energy Friends Community Interest Company | Other services | 2024 |
| North East Glazing Systems Ltd | Construction | 2017 |
| North East Grinding Ltd | Manufacturing | 2016 |
| North East Industrial Roofing Ltd | Construction | 2015 |
| North East International Film Festival Community Interest Company | Arts & recreation | 2023 |
| North East JET SKI Safaris Community Interest Company | Administrative & support | 2023 |
| North East Music Opportunities CIC | Education | 2024 |
| North East Pest Control Limited | Professional & scientific | 2013 |
| North East Plant Hire Limited | Administrative & support | 2013 |
| North East Sheds & Summerhouses Ltd | Manufacturing | 2013 |
| North East Social Innovation LAB C.I.C. | Professional & scientific | 2013 |
| North East Testing Solutions Limited | Extraterritorial | 2010 |
| North East Transport Solutions Limited | Transport & logistics | 2025 |
| North East Tutoring Limited | Education | 2016 |
| North East Wilderness CIC | Education | 2018 |
| North Express Limited | Hospitality | 2023 |
| North Harbour Property Management Company Limited | Households | 2017 |
| North of US Ltd | Professional & scientific | 2023 |
| North Shields Business Chamber Community Interest Company | Administrative & support | 2022 |
| North Shields ESI Barbers Ltd | Other services | 2024 |
| North Shields Fish Quay Company Limited | Agriculture & fishing | 1992 |
| North Shields Football Club Limited | Arts & recreation | 2024 |
| North Shields Holdings Limited | Hospitality | 2018 |
| North Shields Juniors AFC | Arts & recreation | 2012 |
| North Shields Rugby Football Club Community Interest Company | Arts & recreation | 2022 |
| North Shields Snooker Centre Limited | Hospitality | 2023 |
| North Shields Vets Ltd | Professional & scientific | 2025 |
| North Tyne Psychology Ltd | Health & social care | 2025 |
| North Tyneside Art Studio | Education | 1996 |
| North Tyneside Business Forum C.I.C. | Information & communication | 2012 |
| North Tyneside Drum Tuition Limited | Education | 2023 |
| North Tyneside Learning Trust | Education | 2010 |
| North Wrestling Ltd | Arts & recreation | 2018 |
| Northcrow Ltd | Information & communication | 2024 |
| Northeast Architectural Plans Ltd | Professional & scientific | 2010 |
| Northern BOY Media Ltd | Professional & scientific | 2025 |
| Northern Business Consultants Ltd | Professional & scientific | 2015 |
| Northern by Nature Ltd | Agriculture & fishing | 2025 |
| Northern CNC Ltd | Manufacturing | 2019 |
| Northern Conversions & Landscaping Ltd | Construction | 2026 |
| Northern Craft Co-Op Ltd | Other services | 2020 |
| Northern Effluent Solutions Limited | Water & waste | 2017 |
| Northern Estates and Investment Company Limited(The) | Real estate | 1914 |
| Northern FM Ltd | Real estate | 2020 |
| Northern FM Partnership LLP | | 2020 |
| Northern Football Alliance Limited | Arts & recreation | 2000 |
| Northern Haus Developments Ltd | Hospitality | 2022 |
| Northern Mailroom Limited | Administrative & support | 2002 |
| Northern Operations Ltd | Professional & scientific | 2024 |
| Northern RYE Ltd | Manufacturing | 2018 |
| Northern Star Medical Limited | Extraterritorial | 2013 |
| Northern Urology Treatments Ltd | Health & social care | 2024 |
| Northshore Properties NE Ltd | Real estate | 2025 |
| Northside Group Ltd | Professional & scientific | 2023 |
| Northumberland Design and Build Ltd | Construction | 2023 |
| Northumberland Development and Construction Ltd | Construction | 2016 |
| Northumberland Motorhomes Limited | Wholesale & retail | 2024 |
| Northumberland Square Limited | Real estate | 2021 |
| Northumberland Square Management Company Limited | Real estate | 2020 |
| Northumbria Property Co. Limited | Real estate | 1977 |
| Northumbria Youth Action Limited | Wholesale & retail | 1997 |