| MV Print Limited | Manufacturing | 2012 |
| MVB Estates Limited | Real estate | 2021 |
| Mvdermatology Ltd | Health & social care | 2020 |
| MVJ Holdings Ltd | Information & communication | 2025 |
| MVL Northeast Limited | Wholesale & retail | 2017 |
| Mvriix Music Limited | Information & communication | 2026 |
| MW Crane Hire Ltd | Construction | 2000 |
| MW Design (NE) Limited | Professional & scientific | 2015 |
| MW Engineering & Site Services Ltd | Administrative & support | 2013 |
| MW Protection Limited | Financial services | 2025 |
| MWB Retail Ltd | Wholesale & retail | 2023 |
| MWJ Services Ltd | Construction | 2018 |
| MWM Diaconu Limited | Construction | 2017 |
| MXC Property Solutions Ltd | Construction | 2026 |
| MXS Housing Company Limited | Real estate | 2025 |
| My Cedar Homes Ltd | Construction | 2026 |
| My Foodmaster Ltd | Information & communication | 2026 |
| My Forever Content Ltd | Professional & scientific | 2024 |
| My LA Rena Ltd | Hospitality | 2026 |
| My Realm Ltd | Wholesale & retail | 2023 |
| My Sister's Place | Information & communication | 2010 |
| My Vitality Coach Ltd | Health & social care | 2024 |
| Myaa Ltd | Wholesale & retail | 2025 |
| Mydarkplace Ltd | Education | 2017 |
| Mylearnadfriend Limited | Education | 2012 |
| Myownboss ENT Ltd | Information & communication | 2025 |
| Mystic Bites NE Ltd | Hospitality | 2026 |
| Mystique by Sani Ltd | Wholesale & retail | 2024 |
| MZ Estates Northeast Limited | Real estate | 2025 |
| Mzisaa Limited | Professional & scientific | 2025 |
| N & M Pharma-Linguistics Limited | Wholesale & retail | 2019 |
| N a Nelson Atex Limited | Construction | 2022 |
| N Coulson Services Ltd | Construction | 2026 |
| N D Taxi Rentals Limited | Transport & logistics | 2026 |
| N F Rigging Services Limited | Construction | 2025 |
| N MAC Renewables Ltd | Construction | 2025 |
| N O'Donnell Safety Solutions Ltd | Professional & scientific | 2017 |
| N R D & Co UK Limited | Wholesale & retail | 2024 |
| N R Electrics (NE) Limited | Construction | 2025 |
| N R Plumbing Ltd | Construction | 2026 |
| N Sign Holdings Limited | Real estate | 2000 |
| N Touch Events Ltd | Hospitality | 2025 |
| N W Parmo House Ltd | Hospitality | 2025 |
| N W Watson Auto Enterprises Ltd | Wholesale & retail | 2021 |
| N&A Hartlepool Ltd | Hospitality | 2025 |
| N-Tech (North East) Ltd | Professional & scientific | 2024 |
| N. Trewin Properties Limited | Real estate | 2026 |
| N.A.B Inspection Ltd | Manufacturing | 2017 |
| N.E.M.P Ltd | Wholesale & retail | 2023 |
| N.G.E Window Cleaning Services Limited | Administrative & support | 2021 |
| N.Trewin Consulting Ltd | Professional & scientific | 2025 |
| NA Teesside Ltd | Professional & scientific | 2022 |
| Nacl Holdings Limited | Financial services | 2015 |
| Nafee’Skitchen Ltd | Hospitality | 2026 |
| Naija Taste Delight Limited | Extraterritorial | 2025 |
| Nail Delight Limited | Other services | 2025 |
| Nail Icon 49 Ltd | Other services | 2023 |
| Naimal Group Ltd | Wholesale & retail | 2026 |
| Nais Ventures Ltd | Administrative & support | 2026 |
| Nameproof Limited | Transport & logistics | 1992 |
| Nanny Bears Day Care Centre (Scarborough) Limited | Education | 2021 |
| Nanny Bears Day Care Centre (Zetland) Ltd | Education | 2020 |
| Naomi Mckenzie Ltd | Transport & logistics | 2024 |
| Narangba Timbers Ltd | Wholesale & retail | 2020 |
| Nargis Restaurant (NE) Limited | Hospitality | 2026 |
| NAS Gifts Ltd | Wholesale & retail | 2022 |
| NAT Fibre Ltd | Information & communication | 2018 |
| National Enforcement Group Limited | Other services | 2020 |
| Nationwide Dog Handlers Limited | Administrative & support | 2012 |
| Nationwide Pallets & Specialised Freight Ltd | Transport & logistics | 2022 |
| Nationwide Plus Security Limited | Administrative & support | 2025 |
| Nationwide Property Buyers Limited | Real estate | 2010 |
| Nationwide Tyre Disposals Limited | Water & waste | 2017 |
| Natty B Ltd | Other services | 2013 |
| Naveed Property Group Ltd | Real estate | 2026 |
| Navigator North Community Interest Company | Arts & recreation | 2010 |
| Navitas Safety Engineering Ltd | Professional & scientific | 2019 |
| Nawa Car Sales Ltd | Wholesale & retail | 2025 |
| Nawab & Brothers Ltd | Wholesale & retail | 2024 |
| NB Packaging and Catering Supplies Ltd | Wholesale & retail | 2022 |
| NB Services (N/E) Limited | Construction | 2012 |
| Nbce Ltd | Construction | 2019 |
| NBD Electrical Ltd | Construction | 2024 |
| Nbds (NE) Limited | Information & communication | 2007 |
| NBS Designs Ltd | Construction | 2007 |
| NC Electrical Installations Limited | Manufacturing | 2011 |
| NC Facilities & Support Services Ltd | Construction | 2026 |
| NC Planning Ltd | Professional & scientific | 2024 |
| NCC Technical Services Ltd | Professional & scientific | 2025 |
| NCJ Engineering Ltd | Professional & scientific | 2022 |
| NCL PH Traders Ltd | Wholesale & retail | 2024 |
| Ncor UK Limited | Wholesale & retail | 2024 |
| ND 20 Consultancy & Clinical Services Ltd | Professional & scientific | 2024 |
| ND4 Builders Limited | Construction | 2023 |
| Nddmpt Ltd | Construction | 2024 |
| NDH Group Ltd | Manufacturing | 2013 |
| NDK Properties Ltd | Real estate | 2021 |
| Ndlr Property Ltd | Real estate | 2026 |
| NDT Nationwide Ltd | Professional & scientific | 2026 |
| NE Carpets Limited | Wholesale & retail | 2018 |