| Nedtrans &Co Ltd | Transport & logistics | 2017 |
| Needham Hotel and Spa Limited | Hospitality | 2018 |
| Needingworth Park Residents Management Company Limited | Households | 2021 |
| Neel Limited | Real estate | 2022 |
| Neerax Limited | Extraterritorial | 2017 |
| Nefab Packaging UK Limited | Administrative & support | 2001 |
| Negative Emission Solutions Limited | Professional & scientific | 2024 |
| Negroni Consulting Ltd | Financial services | 2016 |
| Neighbourly Surveyors Ltd | Professional & scientific | 2024 |
| Neil Drew-Lopez Consulting Limited | Information & communication | 2025 |
| Neil Ronaldson Building Contractors Limited | Construction | 2012 |
| Neima ROW UK Ltd | Wholesale & retail | 2024 |
| Neli's Barbers Ltd | Other services | 2019 |
| Nella & Peter Properties Ltd | Real estate | 2021 |
| Nelly Works Ltd | Administrative & support | 2023 |
| Nelson House Accountants Limited | Professional & scientific | 2006 |
| Nemo Utilities Consulting Limited | Other services | 2020 |
| Nene Auto Repairs Limited | Wholesale & retail | 2024 |
| Nene Communications Limited | Agriculture & fishing | 2000 |
| Nene Construction Limited | Construction | 2023 |
| Nene Court Residents Management Company Limited | Households | 2005 |
| Nene Data and Electrical Limited | Construction | 2011 |
| Nene Data Network Solutions Ltd | Extraterritorial | 2017 |
| Nene Group Holdings Limited | Professional & scientific | 2014 |
| Nene Group Limited | Real estate | 1973 |
| Nene Management Accounting Limited | Professional & scientific | 2009 |
| Nene Media Limited | Information & communication | 2018 |
| Nene One Ltd | Wholesale & retail | 2025 |
| Nene Property Developments Limited | Construction | 2023 |
| Nene Property Limited | Real estate | 1997 |
| Nene Refrigeration Limited | Manufacturing | 2017 |
| Nene Storage Equipment Holdings Limited | Professional & scientific | 2014 |
| Nene Valley Angling Limited | Wholesale & retail | 2011 |
| Nene Valley Christian Family Refuge Limited | Health & social care | 1988 |
| Nene Valley Enterprises Limited | Wholesale & retail | 2018 |
| Nene Valley Group Ltd | Construction | 2018 |
| Nene Valley Transport Ltd | Transport & logistics | 2017 |
| Nene Valley Winery Limited | Manufacturing | 2023 |
| Nene Warehouse Solutions Ltd | Manufacturing | 1974 |
| Nenmoor Ltd | Construction | 2020 |
| NEO Group Developments Ltd | Construction | 2023 |
| NEO Safer Care Ltd | Public administration | 2023 |
| NEO Solutions Limited | Professional & scientific | 2026 |
| NEO Tea Rooms Ltd | Hospitality | 2016 |
| Neon Digital Document Solutions Limited | Information & communication | 2005 |
| Neon Future Ltd | Information & communication | 2015 |
| Neon Leisure Ltd | Administrative & support | 2011 |
| Neonilad Ltd | Other services | 2019 |
| Neovasion Limited | Manufacturing | 2003 |
| Nephrite Holdings Limited | Financial services | 2026 |
| Neptune Catering Limited | Hospitality | 2015 |
| Neptunus Limited | Other services | 1987 |
| Nerdgasmuk Ltd | Extraterritorial | 2021 |
| Neritan Transport Ltd | Transport & logistics | 2018 |
| Nermin Biochem Limited | Professional & scientific | 2025 |
| Nero Reserve Ltd | Information & communication | 2025 |
| Nervania Ltd | Real estate | 2023 |
| NES Motors Ltd | Wholesale & retail | 2026 |
| Nest Designs 2020 Limited | Professional & scientific | 2006 |
| Nest Holdings Ltd | Real estate | 2018 |
| Nest IT Solutions Ltd | Information & communication | 2022 |
| Nest Q Investment Ltd | Hospitality | 2025 |
| Nestcare Cleaning Limited | Administrative & support | 2026 |
| Nestd Ltd | Real estate | 2023 |
| Nestingminds Ltd | Professional & scientific | 2024 |
| Nesture Property Ltd | Real estate | 2025 |
| Nestwall Energy Ltd | Other services | 2025 |
| NET Distribution Limited | Extraterritorial | 1999 |
| Netadmedia Ltd | Information & communication | 2012 |
| Netavert Ltd | Information & communication | 2023 |
| Netfelex Ltd | Professional & scientific | 2016 |
| Netherside Properties Limited | Real estate | 2022 |
| Netsoft UK Limited | Manufacturing | 2006 |
| Netsol Global Limited | Information & communication | 2016 |
| Netsol Hosting Limited | Information & communication | 2016 |
| Netwarehouse Ltd | Wholesale & retail | 2017 |
| Network First Centres Limited | Other services | 1999 |
| Network Transport Solution Limited | Transport & logistics | 2024 |
| Netzero Ventures Ltd | Financial services | 2020 |
| Neuquip Ltd | Information & communication | 2025 |
| Neuro Nurture Ltd | Health & social care | 2023 |
| Neuro Success LAB CIC | Education | 2026 |
| Neutrahaze Limited | Extraterritorial | 2016 |
| Neuvi Supplements Ltd | Wholesale & retail | 2025 |
| Never Average Marketing Limited | Professional & scientific | 2018 |
| Nevgivup Ltd | Administrative & support | 2025 |
| Nevitec Ceiling Limited | Manufacturing | 2024 |
| Nevitec Investment Ltd | Real estate | 2017 |
| New & Lingwood International Ltd. | Professional & scientific | 1991 |
| New AGE Protection Limited | Administrative & support | 2012 |
| New and Lingwood Limited | Manufacturing | 1916 |
| New Auto Solutions Limited | Wholesale & retail | 2024 |
| New Central Building RTM Company Limited | Households | 2021 |
| New City Finance Limited | Real estate | 1990 |
| New City Training Services Limited | Education | 2002 |
| New Dawn Community Living C.I.C. | Real estate | 2025 |
| New Duston Garage Limited | Wholesale & retail | 1964 |
| New Edge Media Limited | Information & communication | 2004 |
| New ERA Building Limited | Construction | 2020 |
| New ERA Property Venture Limited | Construction | 2024 |