| N.J. Brickwork Limited | Construction | 2018 |
| N.O.V. Transport Ltd | Transport & logistics | 2024 |
| N.S.L Fibre Optic Services Ltd | Information & communication | 2020 |
| N.W Commercials Ltd | Wholesale & retail | 2025 |
| N1A Properties Ltd | Real estate | 2024 |
| N4SH F Ltd | Professional & scientific | 2014 |
| NA Building Surveys Ltd | Professional & scientific | 2023 |
| Naasa Transport Ltd | Transport & logistics | 2022 |
| NAB Services (UK) Limited | Professional & scientific | 2011 |
| Nadeem Construction Ltd | Construction | 2004 |
| Nadia Trans Ltd | Administrative & support | 2016 |
| Nadmaj Transport Ltd | Transport & logistics | 2025 |
| Nadra Card Centre Ltd | Administrative & support | 2022 |
| Nadubva Limited | Wholesale & retail | 2025 |
| Nafal Enterprises Ltd | Wholesale & retail | 2025 |
| Nagajek Services Ltd | Transport & logistics | 2014 |
| Nagina Social Welfare UK Limited | Health & social care | 2012 |
| Nahall Limited | Real estate | 2026 |
| Nail and Paste Limited | Construction | 2013 |
| Nairsyam Limited | Public administration | 2020 |
| Naishe Health Care Limited | Health & social care | 2023 |
| Naked Farmer Limited | Agriculture & fishing | 2006 |
| NAM RH Limited | Other services | 2021 |
| Namanveer Ltd | Administrative & support | 2021 |
| Nambiar Homes Limited | Real estate | 2024 |
| Nandfee Limited | Health & social care | 2015 |
| Nanmas Kitchen Ltd | Hospitality | 2025 |
| Nanny's Ltd | Hospitality | 2023 |
| Nanotech (UK) Solutions Ltd | Wholesale & retail | 2007 |
| Nantclwyd Farms | Agriculture & fishing | 1979 |
| Nany's Lounge Limited | Hospitality | 2024 |
| Naomi Dixon Ltd | Hospitality | 2020 |
| Naomi Northover the Body Transformation Specialist Limited | Other services | 2024 |
| Napierski Transport Services Ltd | Transport & logistics | 2023 |
| Narcis Trans Ltd | Transport & logistics | 2025 |
| Nars Properties Limited | Real estate | 2022 |
| Nasarf Cleaning Services Ltd | Administrative & support | 2026 |
| Naser Fast Foods Ltd | Hospitality | 2026 |
| Nashmakpvt Ltd | Health & social care | 2021 |
| Nashpal Ltd | Hospitality | 2020 |
| Nasiri Convenience Store Ltd | Wholesale & retail | 2024 |
| Nasiri Enterprises Ltd | Real estate | 2026 |
| Nasiri Food Store Ltd | Wholesale & retail | 2021 |
| Nasiri Properties Ltd | Real estate | 2024 |
| Nasp Ltd | Wholesale & retail | 2025 |
| Nassar Transport Ltd | Administrative & support | 2019 |
| Nassor Hotels Ltd | Financial services | 2021 |
| Nastec Engineering Ltd | Construction | 2026 |
| Nastig Ltd | Construction | 2026 |
| NAT Service Limited | Transport & logistics | 2016 |
| NAT. Green Specification Ltd. | Professional & scientific | 2013 |
| Natalia Developments UK Ltd | Construction | 2025 |
| Natalie Heptinstall Creator Ltd | Wholesale & retail | 2026 |
| Nataliia's Dream Ltd | Hospitality | 2024 |
| Natasha Glasgow Consulting Limited | Extraterritorial | 2021 |
| Nate Logic Ltd | Manufacturing | 2025 |
| Nathersonn Ltd | Information & communication | 2023 |
| National Association of Agricultural Contractors(The) | Other services | 1905 |
| National Association of Student Money Advisers | Other services | 2004 |
| National Fire Risk Assessors Ltd | Financial services | 2023 |
| National Group Ltd | Administrative & support | 2018 |
| Nationwide Coaches Ltd | Transport & logistics | 2012 |
| Nationwide Commercial Repairs Ltd | Wholesale & retail | 2019 |
| Nationwide Group Holding Ltd | Professional & scientific | 2022 |
| Nationwide Hydraulics Limited | Manufacturing | 2015 |
| Nationwide Recovery Assistance Limited | Transport & logistics | 2011 |
| Nationwide Statics Limited | Hospitality | 2016 |
| Nationwide Travel Solutions Ltd | Transport & logistics | 2016 |
| Natiruk Ltd | Wholesale & retail | 2024 |
| Native Shop Limited | Wholesale & retail | 2025 |
| Nativeheadroom Ltd | Information & communication | 2026 |
| Natjak Trans Ltd | Transport & logistics | 2019 |
| Natstan (UK) Ltd | Information & communication | 2020 |
| Natur Farm Limited | Hospitality | 2017 |
| Natura Nutrition Limited | Hospitality | 2025 |
| Natural Health Spa Ltd | Other services | 2022 |
| Natural Herbs KH Ltd | Hospitality | 2024 |
| Natural NOM Noms Ltd | Wholesale & retail | 2025 |
| Naturally Sweet Ltd | Manufacturing | 2020 |
| Naturexpress Limited | Wholesale & retail | 2019 |
| Naturoterapia.Co.Uk Ltd | Transport & logistics | 2014 |
| Nautilus Offsite Design Ltd | Manufacturing | 2023 |
| Nautilus Tuberaceae Consulting Ltd | Professional & scientific | 2022 |
| NAV Hussain Electrical Services Ltd | Construction | 2023 |
| NAV Real Estate Ltd | Real estate | 2024 |
| Navigate Life Limited | Health & social care | 2023 |
| Navraj Enterprises Ltd | Real estate | 2023 |
| Nawab Motors Ltd | Wholesale & retail | 2024 |
| Nawras Express Logistics Limited | Transport & logistics | 2020 |
| Nawrazi Food Ltd | Wholesale & retail | 2026 |
| Nawrazi Properties Ltd | Real estate | 2022 |
| Nayaab Jewels Ltd | Wholesale & retail | 2023 |
| Nayani Services Ltd | Wholesale & retail | 2017 |
| Naya’S Cleaning Services Ltd | Administrative & support | 2023 |
| NAZ Oundle Store Ltd | Wholesale & retail | 2024 |
| Nazara Ltd | Wholesale & retail | 2023 |
| Nazir Clothing Limited | Wholesale & retail | 2026 |
| NB Advertising Limited | Professional & scientific | 2021 |
| NB Building Service Ltd | Construction | 2015 |
| NB Kebabs Ltd | Hospitality | 2025 |