| Nashtek Engineering Ltd | Administrative & support | 2013 |
| NAT Nation Group Limited | Financial services | 2026 |
| Natale Associati Ltd | Professional & scientific | 2012 |
| Natascha Forbes Ltd | Wholesale & retail | 2024 |
| Natasha the Look Ltd | Other services | 2024 |
| Nathan Jones Limited | Administrative & support | 2014 |
| Nathan Tapper Limited | Real estate | 2016 |
| Nathan's Properties Ltd | Real estate | 2019 |
| Nation Fencing Ltd | Construction | 2024 |
| National Association of Supported Accommodation Partners Limited | Other services | 2023 |
| National Concrete Solutions Ltd | Professional & scientific | 2022 |
| National Diamond Freight Limited | Transport & logistics | 2026 |
| National Fire Doors Limited | Public administration | 2020 |
| National Network Logistics Ltd | Transport & logistics | 2022 |
| National Nuclear Corporation Limited | Professional & scientific | 1988 |
| National Repair Solutions Ltd | Manufacturing | 2022 |
| National Skills Academy for Nuclear Limited | Other services | 2007 |
| National Supply Teachers Network Ltd | Education | 2023 |
| Nationwide Asset Finance Limited | Financial services | 2002 |
| Nationwide Energy Training Services Ltd | Education | 2012 |
| Nationwide Retail Solutions Limited | Construction | 2006 |
| Nationwide Vehicle Bank Limited | Wholesale & retail | 2005 |
| Native Layer Labs Ltd | Information & communication | 2026 |
| Natuk Company Limited | Wholesale & retail | 2022 |
| Natural Serenity Ltd | Wholesale & retail | 2016 |
| Naue Geosynthetics Limited | Wholesale & retail | 2002 |
| Navarra Blue Properties Limited | Extraterritorial | 2018 |
| Naved Infrastructure Solutions Ltd | Professional & scientific | 2026 |
| Navigate Boldly Ltd | Administrative & support | 2025 |
| Navigator Engineering Limited | Administrative & support | 2019 |
| Navsar Marine Ltd | Administrative & support | 2019 |
| NAW Designs Limited | Professional & scientific | 2017 |
| Nayer Ltd | Other services | 2025 |
| NB Plumbing Services Ltd | Construction | 2020 |
| NB1 Homes Developments Limited | Construction | 2025 |
| NB1 Homes Limited | Real estate | 2025 |
| NBG Rail Services & Sons Limited | Professional & scientific | 2016 |
| NBH Building Solutions Limited | Construction | 2015 |
| NBS Electrical Services (NW) Ltd | Construction | 2019 |
| NC Inspections Limited | Professional & scientific | 2016 |
| NC Projects & Innovation Ltd | Professional & scientific | 2019 |
| NCA Marketing Ltd | Professional & scientific | 2024 |
| NCC Marketing Ltd | Professional & scientific | 2023 |
| Ncfb Welding Services Limited | Administrative & support | 2013 |
| Nchk Consulting Limited | Professional & scientific | 2014 |
| Ncnd Property Ltd | Real estate | 2025 |
| NCS Risk Management Ltd | Professional & scientific | 2012 |
| NCV79 Lettings Limited | Real estate | 2016 |
| NCV79 Limited | Professional & scientific | 2014 |
| Ncwp Limited | Real estate | 2020 |
| ND Instrumentation Limited | Administrative & support | 2009 |
| NDP Nuclear Limited | Administrative & support | 2024 |
| NDW Engineering Limited | Administrative & support | 2013 |
| NDY Technical Services Limited | Administrative & support | 2016 |
| Neal Chamberlain Associates Ltd | Professional & scientific | 2025 |
| Neale Grant Stephens Limited | Professional & scientific | 1989 |
| NEAR2YOU Lettings Ltd | Real estate | 2025 |
| Neary Project Planning Limited | Professional & scientific | 2024 |
| Neat Engineering Consultants Limited | Administrative & support | 2012 |
| NEB Consultancy Ltd | Administrative & support | 2025 |
| Nebulosa Limited | Administrative & support | 2024 |
| NEC PAY Ltd | Hospitality | 2017 |
| NEC Supervisor Consultancy Ltd | Administrative & support | 2025 |
| Nedkov and Family Ltd | Other services | 2024 |
| Need Brickwork Ltd | Construction | 2022 |
| Needin CIC | Wholesale & retail | 2026 |
| NEG Micon UK Limited | Manufacturing | 1997 |
| NEH Commercial Management Limited | Other services | 2018 |
| Neighborhoods Store Limited | Wholesale & retail | 2026 |
| Neighbourhood Construction NW Limited | Construction | 2022 |
| Neighbours Energy Solutions Ltd | Professional & scientific | 2026 |
| Neighbours Fulai Takeaway Limited | Hospitality | 2024 |
| Neil & Karl Properties Ltd | Real estate | 2025 |
| Neil Billington Upvc Ltd | Construction | 2016 |
| Neil Harrison Courier Limited | Transport & logistics | 2012 |
| Neil Hicks Consultants Ltd | Administrative & support | 2023 |
| Neil Rogers Project Management Ltd | Administrative & support | 2023 |
| Neilson Duncan Consultants Limited | Information & communication | 2015 |
| NEL Civils Ltd | Professional & scientific | 2019 |
| Nelder Engineering Limited | Professional & scientific | 2015 |
| Nellie's Netball Ltd | Education | 2022 |
| Nellior LLP | | 2020 |
| Nelmoss Limited | Information & communication | 2007 |
| Nelson Management Consultants Limited | Administrative & support | 2013 |
| Nemat Building Contractors Ltd | Construction | 2021 |
| Nemeth Automation Limited | Information & communication | 2017 |
| Nemmer Limited | Administrative & support | 2019 |
| Nemonic Limited | Education | 2015 |
| Nemoros Music Publishing Limited | Extraterritorial | 2011 |
| Nemoros Records Limited | Extraterritorial | 2011 |
| Nempire Health Care Limited | Health & social care | 2021 |
| Nene Valley Fisheries Limited | Arts & recreation | 2008 |
| NEO Motor Company NW Ltd | Wholesale & retail | 2019 |
| Neon Construction NW Ltd | Construction | 2025 |
| Neon Wilderness Ltd | Professional & scientific | 2020 |
| Nerma Management & Solutions Limited | Administrative & support | 2022 |
| Nesarajah Holdings Limited | Real estate | 2016 |
| Nesbitt Consultancy Limited | Professional & scientific | 2021 |
| Nesha Limited | Administrative & support | 2025 |
| Nest Collection Ltd | Wholesale & retail | 2025 |