| Namah Property Ltd | Real estate | 2025 |
| Naples Merchants Limited | Manufacturing | 2025 |
| Nardac Group Services Ltd | Professional & scientific | 2026 |
| Narmatha Ltd | Real estate | 2024 |
| Narvanfastfood Limited | Hospitality | 2025 |
| Nasmar Ltd | Transport & logistics | 2022 |
| Nassive Limited | Professional & scientific | 2023 |
| Natick Holdings Limited | Health & social care | 2019 |
| Nationalwheels UK Ltd | Administrative & support | 2025 |
| Natural Craft Supplies Ltd | Wholesale & retail | 2024 |
| Nawab Transport Limited | Transport & logistics | 2026 |
| NBC Universal Global Networks UK Limited | Information & communication | 1998 |
| Ncube Tech Services Limited | Information & communication | 2012 |
| NDC Hris Solutions Ltd | Information & communication | 2009 |
| Neam Consulting Ltd | Professional & scientific | 2013 |
| Needa Clothing Limited | Wholesale & retail | 2025 |
| Neos Ventures Limited | Information & communication | 2016 |
| NET Positive Limited | Professional & scientific | 2021 |
| NET Positive Solutions Ltd | Professional & scientific | 2020 |
| Netz Ltd | Wholesale & retail | 2022 |
| Neuropsp Together Limited | Health & social care | 2025 |
| Nevertheless AI Ltd | Information & communication | 2025 |
| New Acre Electrical Holdings Limited | Real estate | 2019 |
| New Acre Electrical Limited | Construction | 2018 |
| New Ambassador Cars Ltd | Transport & logistics | 2017 |
| New Frontier Holdings Ltd | Professional & scientific | 2019 |
| New Haven Diversified Limited | Administrative & support | 2007 |
| New Mari Masala Limited | Other services | 2016 |
| New Nech Ltd | Wholesale & retail | 2025 |
| New Novo Trends Ltd | Wholesale & retail | 2025 |
| New Touch Ltd | Wholesale & retail | 2023 |
| Newmont Engineering Company Limited | Manufacturing | 1955 |
| Newserge Limited | Other services | 2013 |
| Nexbuild Group Ltd | Construction | 2025 |
| Next Chapter Design Limited | Professional & scientific | 2017 |
| Next GEN Soft Limited | Administrative & support | 2014 |
| Nextera Wisdom Ltd | Education | 2023 |
| Nextgensolutionsit Ltd | Professional & scientific | 2024 |
| Neyyar Ventures UK Limited | Professional & scientific | 2020 |
| Nezhad Medical Consultants Limited | Health & social care | 2007 |
| Nice Chaps Limited | Professional & scientific | 2016 |
| Nick Hudson Fine Furniture Limited | Manufacturing | 2003 |
| Nidaan Ltd | Construction | 2018 |
| Nihar Consultants Ltd | Administrative & support | 2023 |
| Nijjar Transport (Slough) Limited | Transport & logistics | 2016 |
| Nika Consulting Ltd | Health & social care | 2002 |
| Nikar Technology Limited | Information & communication | 2026 |
| Nimbier Ltd | Wholesale & retail | 2020 |
| Nimoh Ltd. | Manufacturing | 1999 |
| Nimoh Scientific Limited | Manufacturing | 2011 |
| NIS Associates Ltd | Wholesale & retail | 2025 |
| Nismo Ltd | Professional & scientific | 2017 |
| Niti Nivesh Limited | Real estate | 2024 |
| NK New Solution Ltd | Administrative & support | 2017 |
| NKB Investments Limited | Real estate | 2017 |
| NKS Clinical Services Ltd | Professional & scientific | 2017 |
| NL Technologies Ltd | Information & communication | 2019 |
| NLG Jewellers Limited | Professional & scientific | 2018 |
| NLU Properties Ltd | Real estate | 2019 |
| NNS Property Limited | Real estate | 2024 |
| NNT Logistics and Transport Ltd | Transport & logistics | 2025 |
| Noble Form Perfumes Ltd | Manufacturing | 2025 |
| Noble Imports Limited | Wholesale & retail | 2020 |
| Nodacrux Ltd | Manufacturing | 2023 |
| Noga Building Services Ltd | Construction | 2022 |
| Nomad Fruits Limited | Wholesale & retail | 2021 |
| Nomnom Sweets Ltd | Wholesale & retail | 2020 |
| Non-Violent London Limited | Manufacturing | 2024 |
| Nonstop Enterprises Ltd | Professional & scientific | 2021 |
| Noor Industries Ltd | Wholesale & retail | 2026 |
| Nordic Lifesci Consulting Ltd | Professional & scientific | 2026 |
| Nordicframe Ltd | Construction | 2025 |
| Nordigital.Net Ltd | Information & communication | 2009 |
| Norosoft Limited | Information & communication | 2016 |
| Nostairway Creative Limited | Information & communication | 2016 |
| Nostra Star Ltd | Wholesale & retail | 2022 |
| Nourish Brands Limited | Professional & scientific | 2025 |
| Nova Design & Building Ltd | Real estate | 2025 |
| Nova Merchandise Limited | Wholesale & retail | 2025 |
| Nova Vitae Real Estate Limited | Professional & scientific | 2016 |
| Novacub Ltd | Wholesale & retail | 2022 |
| Novence Ltd | Financial services | 2010 |
| NOW TV Limited | Information & communication | 2014 |
| NOX Lumina Ltd | Information & communication | 2022 |
| Noyi Networks Limited | Information & communication | 2016 |
| NP Car Wash Ltd | Other services | 2018 |
| NP Design Ltd | Arts & recreation | 2014 |
| NR Medical Limited | Health & social care | 2010 |
| NRA Property Limited | Real estate | 2020 |
| NRK Property Limited | Real estate | 2025 |
| Nrkk Ltd | Construction | 2023 |
| Nrkk Services Ltd | Construction | 2023 |
| Nsarkohumoja Limited | Professional & scientific | 2023 |
| NSE Carpentry Ltd | Construction | 2021 |
| NSE General Constructions Ltd | Construction | 2025 |
| NSK Superstores UK Ltd | Wholesale & retail | 2019 |
| NSL Design & Build Limited | Construction | 2025 |
| NSL Property Ltd | Real estate | 2020 |
| Ntombizonke Ltd | Health & social care | 2012 |
| Nukleus.Ai Limited | Information & communication | 2025 |