| National Visioncare Ltd | Health & social care | 2017 |
| National Welding Supplies Limited | Wholesale & retail | 2023 |
| National Work-Integrated Education Partnership Ltd | Information & communication | 2025 |
| Nationwide Paramedics Ltd | Health & social care | 2019 |
| Nationwide Tech Supplies Ltd | Wholesale & retail | 2025 |
| Nationwide Water Systems Ltd | Water & waste | 2023 |
| Natitude Bars Ltd | Hospitality | 2025 |
| Native Element Holdings Ltd | Financial services | 2026 |
| Nativeco Limited | Wholesale & retail | 2021 |
| Natreal Ltd | Administrative & support | 2016 |
| Natta.Ai Limited | Professional & scientific | 2024 |
| Natural Cosmetics Inc Ltd | Wholesale & retail | 2019 |
| Natural Dog Food Direct Limited | Manufacturing | 2017 |
| Natural Naayyaa Ltd | Wholesale & retail | 2023 |
| Natural Survivor Ltd | Education | 2017 |
| Naturally B Limited | Wholesale & retail | 2018 |
| Naturally Northern Apothecary Ltd | Wholesale & retail | 2025 |
| Naturals 4 ME Ltd | Manufacturing | 2020 |
| Nature Speaks Ltd | Information & communication | 2026 |
| Natures Zest Limited | Other services | 2023 |
| Naturespy | Wholesale & retail | 2014 |
| Navas Group Ltd | Financial services | 2025 |
| Navi Trading (East Midlands) Limited | Administrative & support | 2024 |
| Navigator Investments Ltd | Financial services | 2023 |
| Navios Limited | Wholesale & retail | 2020 |
| Navitas Natura Ltd | Health & social care | 2024 |
| Navix Limited | Wholesale & retail | 2019 |
| Nawayah Ltd | Wholesale & retail | 2026 |
| Naxeema Ltd | Wholesale & retail | 2026 |
| Nazadataworks Ltd | Information & communication | 2023 |
| Nazema Ltd | Wholesale & retail | 2026 |
| NB Healthtech Ltd | Professional & scientific | 2024 |
| NB Lets Ltd | Real estate | 2025 |
| NBL Commerce Limited | Wholesale & retail | 2025 |
| NC Hydro Limited | Professional & scientific | 2014 |
| Nckk Ltd | Financial services | 2025 |
| NDK Construction Ltd | Construction | 2021 |
| NDW & Sons Limited | Construction | 2022 |
| Nead Support Ltd | Health & social care | 2025 |
| Neale-Hall Lettings Limited | Real estate | 2024 |
| Nearme Recovery Services Ltd | Transport & logistics | 2025 |
| Nearu Self Defence Ltd | Arts & recreation | 2020 |
| Neat & Gorgeous Limited | Other services | 2014 |
| Neat-Installations Ltd | Construction | 2025 |
| Neatura Limited | Wholesale & retail | 2026 |
| Nebla Ltd | Professional & scientific | 2025 |
| Nebs IT Solutions Ltd | Information & communication | 2024 |
| Nebulox Ltd | Administrative & support | 2020 |
| NED Studio Ltd | Information & communication | 2025 |
| Nedrag Limited | Extraterritorial | 2016 |
| Nedsert Distribution Ltd | Wholesale & retail | 2023 |
| NEE Huat (UK) Ltd | Wholesale & retail | 2025 |
| Need Creative Limited | Professional & scientific | 2017 |
| Needham Market Veterinary Centre Ltd | Professional & scientific | 2023 |
| Needham Wood Ltd | Health & social care | 2024 |
| Needtone Limited | Other services | 2025 |
| Neempoint Ltd | Wholesale & retail | 2025 |
| Negso Ltd | Information & communication | 2024 |
| Neighbrly Ltd | Information & communication | 2025 |
| Neil Grigg Limited | Professional & scientific | 2011 |
| Neil Hillier PT Limited | Other services | 2003 |
| Neil Walmsley Holdings Limited | Financial services | 2016 |
| Neill's Materials Limited | Arts & recreation | 2014 |
| Nekst Group Limited | Professional & scientific | 2023 |
| Nellie Ford Ltd | Health & social care | 2010 |
| Nelo Ltd | Financial services | 2023 |
| Nelson Motor Parts Ltd | Wholesale & retail | 2025 |
| Nemes & Sons Limited | Professional & scientific | 2025 |
| Nemes Group Holdings Ltd | Financial services | 2025 |
| Nemes Solutions Limited | Construction | 2026 |
| Nemeton Farm Ltd | Agriculture & fishing | 2024 |
| Nemi Services Ltd | Professional & scientific | 2021 |
| Neon Lace Ltd | Wholesale & retail | 2025 |
| Neopak Ltd | Wholesale & retail | 2025 |
| Neopatron Ltd | Wholesale & retail | 2022 |
| Neovedika Knowledge Strategies Limited | Professional & scientific | 2007 |
| Neovyx AI-99 Ltd | Information & communication | 2026 |
| Neoza Properties Ltd | Real estate | 2023 |
| Nerogoods Ltd | Wholesale & retail | 2025 |
| Nervae Ltd | Wholesale & retail | 2026 |
| Nesc Scaffolding Ltd | Construction | 2024 |
| Nest & Noble Limited | Real estate | 2025 |
| Nest EGG Investments II Limited | Real estate | 2017 |
| Nest EGG Investments III Limited | Real estate | 2019 |
| Nest EGG Investments IV Limited | Real estate | 2019 |
| Nest EGG Investments Limited | Real estate | 2013 |
| Nest EGG Investments V Limited | Real estate | 2021 |
| Nest Enterprises Ltd | Real estate | 2024 |
| Nest Reserve Ltd | Information & communication | 2026 |
| Nesti Ltd | Manufacturing | 2018 |
| Nestledown Kennels Ltd | Real estate | 2020 |
| Nestworx Studio Ltd | Real estate | 2025 |
| NET Accountants Limited | Professional & scientific | 2023 |
| NET Flow Campaigns Ltd | Professional & scientific | 2025 |
| NET Lawman Ltd | Professional & scientific | 1991 |
| NET TEC Limited | Professional & scientific | 2009 |
| Net-Plan Limited | Information & communication | 2023 |
| Netflex Ltd | Manufacturing | 2025 |
| Netherstate Limited | Professional & scientific | 2016 |
| Netiface Limited | Extraterritorial | 2024 |