| National Hypnotherapy Society Ltd. | Education | 1999 |
| National Nrswa Solutions Ltd | Professional & scientific | 2025 |
| National Parking Management Limited | Administrative & support | 2012 |
| National Tube Straightening Service Ltd | Manufacturing | 2013 |
| Nationwide Employment Lawyers Ltd | Professional & scientific | 2013 |
| Nationwide Roofing & Maintenance Ltd | Construction | 2022 |
| Native Care Ltd | Administrative & support | 2022 |
| Native Independent Ltd | Wholesale & retail | 2026 |
| Natterjack Construction Limited | Administrative & support | 2009 |
| Natterjack South Limited | Construction | 2018 |
| Natukaj Cares Ltd | Health & social care | 2025 |
| Natural 20 Limited | Wholesale & retail | 2019 |
| Natural Touch Landscapes Limited | Other services | 2007 |
| Nature's Wish Ltd | Wholesale & retail | 2011 |
| Natus Property Group Ltd | Real estate | 2019 |
| Nautilus (Worthing) Freehold Limited | Real estate | 2013 |
| Navy Blue Holdings Limited | Professional & scientific | 2020 |
| NAW Solutions Ltd | Professional & scientific | 2023 |
| NC Solutions Limited | Information & communication | 2018 |
| Ncps Offices Ltd | Real estate | 2023 |
| NCR Financial Services Limited | Financial services | 2012 |
| Nduna Stores Ltd | Transport & logistics | 2024 |
| NDV Shopfitting Ltd | Manufacturing | 2025 |
| Ne:On Brand Consultants Limited | Professional & scientific | 2024 |
| Neal Bros Limited | Professional & scientific | 2023 |
| Neat Software Limited | Information & communication | 2017 |
| NEB Ventures Limited | Wholesale & retail | 2012 |
| Nebula PPS Limited | Manufacturing | 2002 |
| Nebula Student Management Limited | Real estate | 2019 |
| Nedboh Limited | Other services | 2022 |
| NEE Property Management Ltd | Real estate | 2025 |
| Need the Dough Ltd | Manufacturing | 2022 |
| Neelima Ltd | Information & communication | 2024 |
| Neemo Holdings Limited | Financial services | 2024 |
| Neenaw Ltd | Information & communication | 2023 |
| Nello Consulting Ltd | Professional & scientific | 2024 |
| Nellz Limited | Information & communication | 2020 |
| Nelvex Ltd | Professional & scientific | 2026 |
| Nemedis Limited | Information & communication | 2016 |
| Nenagh ARC Ltd | Professional & scientific | 2023 |
| Nepcote Financial Limited | Financial services | 2007 |
| Neptune GAS Plumbing & Heating Solutions Ltd | Construction | 2023 |
| Ness TV Holdings Limited | Financial services | 2019 |
| NET Tech Sussex Ltd | Wholesale & retail | 2025 |
| Netcomm IT Solutions Ltd | Information & communication | 2012 |
| Netinteractive Ltd | Administrative & support | 2009 |
| Networkgl Limited | Administrative & support | 2013 |
| Neurica Ltd | Information & communication | 2025 |
| Neurohub Community Ltd | Professional & scientific | 2026 |
| Neuropsychological Rehabilitation Ltd | Health & social care | 2021 |
| Neutral Blue Limited | Financial services | 2024 |
| Nevaro Ltd | Administrative & support | 2025 |
| New Amsterdam Ltd | Hospitality | 2018 |
| New Balance Limited | Administrative & support | 2013 |
| New Beijing Limited | Hospitality | 2015 |
| New Digs Limited | Real estate | 2019 |
| New ERA Academy of Drama & Music(London)Limited(The) | Education | 1941 |
| New ERA Consultancy Limited | Information & communication | 1999 |
| New Forest Films Ltd | Information & communication | 2018 |
| New Forest Heating and Plumbing Solutions Ltd | Construction | 2011 |
| New Golden China Ltd | Hospitality | 2026 |
| New Life Church Durrington Development Ltd | Construction | 2026 |
| New Life Church Worthing | Other services | 2010 |
| New Mcgregors Ltd | Wholesale & retail | 2025 |
| New President Limited | Wholesale & retail | 2025 |
| New Space UN Ltd | Manufacturing | 2025 |
| New Wave Electrical Contractors Ltd | Construction | 2019 |
| New World Sustainable Solutions Limited | Professional & scientific | 2010 |
| Newby Engineering and Technology Ltd | Professional & scientific | 2022 |
| Newco Limited | Extraterritorial | 1995 |
| Newcraft Properties Limited | Real estate | 1999 |
| Newdaynewyou Ltd | Other services | 2020 |
| Newlands Commercial Limited | Real estate | 2022 |
| Newlands House Gallery Limited | Wholesale & retail | 2019 |
| Newlands Investment Holdings Limited | Financial services | 2024 |
| Newlife Paints Limited | Manufacturing | 2008 |
| Newman & Sons Limited | Construction | 2013 |
| Newnham Engineering Limited | Manufacturing | 1967 |
| Newnham Engineering Production Limited | Extraterritorial | 2009 |
| Newstone Talent Solutions Ltd | Administrative & support | 2018 |
| Newtimber Lofts Ltd | Manufacturing | 2025 |
| Newtown Ventures Limited | Real estate | 2004 |
| Newvision Contractors Ltd | Construction | 2024 |
| Nexaus Global Ltd | Wholesale & retail | 2025 |
| Next Approach One Ltd | Real estate | 2013 |
| Next Approach Two Ltd | Real estate | 2025 |
| Next Chapter Property Clearance Ltd | Water & waste | 2026 |
| Next Level Construction Sussex Ltd | Construction | 2021 |
| Next Momentum Ltd | Information & communication | 2020 |
| Next-Level Contractors Sussex Ltd | Construction | 2024 |
| Next-Level Developments Sussex Ltd | Construction | 2023 |
| Next-Level Group Sussex Ltd | Financial services | 2024 |
| Next-Level Roofing Sussex Ltd | Construction | 2023 |
| Next-Level Waste Management Sussex Ltd | Water & waste | 2024 |
| Nextquest Partners Ltd | Administrative & support | 2025 |
| Nexus Associates Limited | Other services | 2011 |
| Nexus Europa CIC | Education | 2026 |
| Nexus Litigation UK Limited | Financial services | 2024 |
| NF Media Limited | Other services | 2020 |
| Ngara Holdings Limited | Financial services | 2020 |