| Nean Wealth Advisors (UK) Limited | Other services | 2002 |
| Neaveford Limited | Agriculture & fishing | 1978 |
| Nedtech Ltd | Professional & scientific | 2025 |
| Needeachother Limited | Administrative & support | 2015 |
| Neha Jain & Co Ltd | Other services | 2017 |
| Neha Limited | Wholesale & retail | 2013 |
| Neha Patel & Co Ltd | Other services | 2017 |
| Neil-Smith Utilities Ltd | Construction | 2026 |
| Nelpord Healthcare Limited | Health & social care | 2022 |
| Nelson Residential Property Limited | Real estate | 2024 |
| Nem.Services Ltd | Manufacturing | 2025 |
| Nene Industries Limited | Financial services | 1998 |
| Nene Publishing Ltd | Information & communication | 2023 |
| Nene Valley Aesthetics Limited | Other services | 2025 |
| Nene Valley Campers Limited | Administrative & support | 2018 |
| Nene Valley Osteopathy Ltd | Health & social care | 2016 |
| Nenegate Limited | Professional & scientific | 2011 |
| Neon Excellence Ltd | Manufacturing | 2022 |
| Neph Properties Ltd | Real estate | 2025 |
| Neptune Project Consulting Limited | Administrative & support | 2013 |
| Nero Span Logistics Ltd | Transport & logistics | 2026 |
| Nerocharm Limited | Transport & logistics | 2007 |
| Nerostar Limited | Information & communication | 2025 |
| NES Contracting Limited | Construction | 2014 |
| NES Education Services Limited | Real estate | 2000 |
| NES Property Solutions Ltd | Real estate | 2025 |
| Nesdavinche Ltd | Manufacturing | 2025 |
| Nestlayercare Ltd | Health & social care | 2023 |
| Netcab Ltd | Information & communication | 2001 |
| Neti Neti Ltd | Transport & logistics | 2022 |
| Network Design & Installation Limited | Information & communication | 2000 |
| Network Efficiency Group Ltd | Professional & scientific | 2026 |
| Network Vehicle Solutions Ltd | Administrative & support | 2017 |
| Neurodiverse Psychology Ltd | Health & social care | 2022 |
| Neurodiversity Care Ltd | Health & social care | 2019 |
| Never Mind the Bullocks Limited | Information & communication | 2022 |
| New Africa Comics Ltd | Information & communication | 2018 |
| New BUD Care Limited | Health & social care | 2020 |
| New China and Thai Food Ltd | Hospitality | 2026 |
| New Driver Programme Ltd | Information & communication | 2016 |
| New Leaf Maintenance Limited | Construction | 2014 |
| New Leaf Windows Ltd | Construction | 2026 |
| New Oasis Ltd | Administrative & support | 2025 |
| New Office Group Holdings Ltd | Financial services | 2024 |
| New Office Group Ltd | Wholesale & retail | 2020 |
| New Vision John Ltd | Construction | 2021 |
| New Wave Antiques Ltd | Wholesale & retail | 2022 |
| NEW2ANTIQUE Shop Ltd | Wholesale & retail | 2025 |
| Newbell Cuisine Limited | Hospitality | 2019 |
| Newgrange Consultants Limited | Administrative & support | 2021 |
| Newleaf Installations Ltd | Construction | 2025 |
| Newmans of Rothwell Limited | Wholesale & retail | 2026 |
| Newstead Grove Limited | Real estate | 2024 |
| Newton & Nell Sales Consultancy Limited | Information & communication | 2025 |
| Newvotek Limited | Real estate | 2005 |
| Nexadesign Limited | Information & communication | 2024 |
| Next Step Podiatry Limited | Health & social care | 2020 |
| Nextsync Limited | Transport & logistics | 2020 |
| Nexus Training Towcester Ltd | Arts & recreation | 2025 |
| Nexus.Rgt Limited | Construction | 2023 |
| NF Care Ltd | Professional & scientific | 2025 |
| Ng-Primetek Ltd | Information & communication | 2025 |
| NHC Electrical Ltd | Construction | 2022 |
| Nicholas C Lambert Limited | Construction | 2022 |
| Nicholls & Sons Properties Ltd | Real estate | 2013 |
| Nicholls Joinery Limited | Manufacturing | 2007 |
| Nick Mason Ltd | Professional & scientific | 2011 |
| Nick Tour Ltd | Transport & logistics | 2023 |
| Nick Walsh Bass Ltd | Arts & recreation | 2026 |
| Niclaire Enterprise Ltd | Hospitality | 2024 |
| Nicolas L.S. Limited | Transport & logistics | 2025 |
| Nicole Logistics Ltd | Transport & logistics | 2018 |
| Nifti Gifts Ltd | Wholesale & retail | 2021 |
| Nigel LAY Limited | Administrative & support | 2003 |
| Nilcon Green Energy UK Limited | Construction | 2023 |
| Nimble Productions Limited | Professional & scientific | 1996 |
| Nine Arches Investments Ltd | Financial services | 2019 |
| Nineteen Accountants Group Limited | Financial services | 2026 |
| Nineteen Accountants Limited | Professional & scientific | 2011 |
| Nineteen Bookkeeping Limited | Professional & scientific | 2016 |
| Nineteen Tax Limited | Professional & scientific | 2026 |
| Nirmenza Developments Limited | Construction | 2024 |
| Nishal Limited | Health & social care | 2021 |
| NLP Healing Ltd | Health & social care | 2012 |
| NLS Agencies Limited | Wholesale & retail | 2023 |
| NLZ Solutions Ltd | Information & communication | 2017 |
| NMA Foods Ltd | Wholesale & retail | 2025 |
| NMC Housing Limited | Construction | 2014 |
| NMC Transport Services Ltd | Transport & logistics | 2026 |
| NMM Transport Limited | Transport & logistics | 2018 |
| NN Local Media & Training CIC | Information & communication | 2024 |
| NN15 Ltd | Real estate | 2019 |
| NNP Solutions Ltd | Information & communication | 2026 |
| NO Contact Cars Ltd | Administrative & support | 2020 |
| NO Windows Holdings Ltd | Financial services | 2021 |
| NO. 19 Wellness & Beauty Ltd | Other services | 2021 |
| Nobby Stocker Limited | Wholesale & retail | 2017 |
| Noctor Construction Ltd | Extraterritorial | 2021 |
| Noctor Group Limited | Financial services | 2024 |
| Nolaz Homes Limited | Real estate | 2024 |