| Nathan Aris Limited | Professional & scientific | 2020 |
| Nathan Hallmark Limited | Other services | 2016 |
| National Candidate Solutions Ltd | Education | 2025 |
| National Fest Ltd | Arts & recreation | 2016 |
| National Home Protect Ltd | Manufacturing | 2019 |
| National Independent Deceased Care Standard Ltd | Professional & scientific | 2026 |
| National Land & Development Ltd | Real estate | 2021 |
| National Savings Solutions Ltd | Real estate | 2017 |
| National Steel Buildings Ltd | Construction | 2018 |
| Nationel Services Ltd | Construction | 2017 |
| Nationmediauk Limited | Information & communication | 2024 |
| Nationwide School Supplies Limited | Administrative & support | 2006 |
| Nationwidetechnologyltd Ltd | Manufacturing | 2020 |
| Native Formulas Ltd | Wholesale & retail | 2025 |
| Natural Capital Valuation Ltd | Real estate | 2025 |
| Natural Wholesale Ltd | Wholesale & retail | 2021 |
| Natures-Panacea Limited | Professional & scientific | 2011 |
| Naturways Ltd | Wholesale & retail | 2018 |
| Nauticool Limited | Transport & logistics | 2002 |
| Nautilus Developments 19 Ltd | Construction | 2024 |
| Nautilus International Holding Group Limited | Financial services | 2024 |
| Nautilus International Risk Consultants Ltd | Public administration | 2005 |
| Nautilus Properties Ltd | Construction | 2011 |
| Navelo Ltd | Transport & logistics | 2020 |
| Navfit Ltd | Manufacturing | 2022 |
| Navidam Ltd. | Transport & logistics | 2025 |
| Navigator Mews Management Company Ltd | Real estate | 2020 |
| Navigatoreu Ltd | Wholesale & retail | 2021 |
| Navitas Energy Limited | Construction | 2013 |
| Nayyad Ltd | Wholesale & retail | 2026 |
| Nayyar Abbas Ltd | Wholesale & retail | 2025 |
| Nazaliar Limited | Wholesale & retail | 2024 |
| NB Home Improvements Ltd | Construction | 2024 |
| NB Powder Coating Services Ltd | Manufacturing | 2023 |
| Nbelanina Ltd | Health & social care | 2021 |
| NC Technology & Consultancy Ltd | Financial services | 2014 |
| NC Ventures Limited | Administrative & support | 2019 |
| Ncmd Limited | Wholesale & retail | 2017 |
| Ncno Ltd | Real estate | 2024 |
| Ncrypted Ltd | Information & communication | 2019 |
| Ncse Services Ltd | Professional & scientific | 2019 |
| Ndaqo UK Limited | Information & communication | 2022 |
| NDO Purchasing Consultancy Limited | Professional & scientific | 2004 |
| NDR Estates Ltd | Construction | 2025 |
| NDS Site Installation Services Ltd | Construction | 2019 |
| Ne-Petz Ltd | Wholesale & retail | 2025 |
| NEAPO3 Ltd | Transport & logistics | 2025 |
| Neapolis PKS Ltd | Professional & scientific | 2008 |
| Nebula Homes Limited | Real estate | 2025 |
| Nechulli Ltd | Real estate | 2025 |
| Necsca Ltd | Information & communication | 2024 |
| Neda Bairamalibasmang Ltd | Extraterritorial | 2023 |
| Nedas Medical Services Limited | Health & social care | 2021 |
| Nedy Healthcare Ltd | Health & social care | 2017 |
| Needit Clickit Ltd | Wholesale & retail | 2018 |
| Needles Point RTE Limited | Households | 2017 |
| Needles View Freehold Limited | Real estate | 2005 |
| Neetly Ltd | Information & communication | 2022 |
| Neicac Design Ltd | Professional & scientific | 2026 |
| Neidyr Ltd. | Wholesale & retail | 2025 |
| Neil F Fuller Limited | Professional & scientific | 2011 |
| Neil White Creative Limited | Professional & scientific | 2014 |
| NEL Limited | Real estate | 2009 |
| Nelashez Limited | Administrative & support | 2021 |
| Nellyblu Ltd | Wholesale & retail | 2025 |
| Nelson Brothers Security Consultancy Limited | Administrative & support | 2023 |
| Nelson Entertainment Ltd | Hospitality | 2024 |
| Nelson Stanley Limited | Water & waste | 1976 |
| Nemesis Autos Limited | Wholesale & retail | 2018 |
| NEO Air Ltd | Manufacturing | 2024 |
| NEO Finance Limited | Financial services | 2010 |
| Neolin JC Noel Limited | Information & communication | 2026 |
| Neon Brothers Ltd | Wholesale & retail | 2025 |
| Neon Developments Limited | Construction | 2011 |
| Neon Thread Learning Ltd | Professional & scientific | 2025 |
| Neosor Ltd | Wholesale & retail | 2021 |
| Neotek Ltd | Wholesale & retail | 2023 |
| Nereus Alarms Limited | Manufacturing | 2001 |
| NES Health Limited | Extraterritorial | 2019 |
| Nest ( Dorset ) Limited | Real estate | 2025 |
| Nest Mortgage and Financial Solutions Ltd | Financial services | 2022 |
| Nest on the Heath Ltd | Hospitality | 2023 |
| Nesting Care Homes Limited | Health & social care | 2025 |
| Netchain Media Ltd | Information & communication | 2025 |
| Netfence Limited | Information & communication | 2020 |
| Netrack Ltd | Professional & scientific | 2012 |
| Netvora Ltd | Information & communication | 2025 |
| Networkq Ltd | Manufacturing | 2025 |
| Neuehome Limited | Construction | 2019 |
| Neurakinetic Ltd | Information & communication | 2025 |
| Neuroinclusivity Consultancy Ltd | Professional & scientific | 2023 |
| Neve Business Ltd | Wholesale & retail | 2025 |
| Neverbreeze Studios Ltd | Information & communication | 2025 |
| Nevercode EBT Ltd | Financial services | 2022 |
| Nevercode Ltd | Information & communication | 2017 |
| Neville Dean & Co Ltd | Professional & scientific | 2006 |
| Nevo Solutions Ltd | Information & communication | 2025 |
| New & Used Car Parts 24-7 Ltd | Wholesale & retail | 2017 |
| New Art Construction Ltd | Construction | 2026 |
| New Aspect Ltd | Real estate | 2024 |