| Nextgen Inc Ltd | Construction | 2025 |
| Nextpath Global Consulting Limited | Professional & scientific | 2025 |
| Nextride Ltd | Wholesale & retail | 2025 |
| Nexus Engage Limited | Professional & scientific | 2013 |
| Nexus Healthcare Staffing Ltd | Health & social care | 2014 |
| Nexus Team Limited | Administrative & support | 2009 |
| NEXUS21 Ltd | Hospitality | 2018 |
| Nexuus Ltd | Wholesale & retail | 2025 |
| NF Tech CS Ltd | Information & communication | 2022 |
| NF3 Group Ltd | Professional & scientific | 2022 |
| Nfbc Ltd | Health & social care | 2018 |
| NFC Supermarket Ltd | Wholesale & retail | 2024 |
| Nfjl Limited | Wholesale & retail | 2001 |
| NFM 126-40 KS Limited | Real estate | 2022 |
| NFM Asset Management (NO1) Limited | Real estate | 2022 |
| NFM Asset Management (NO2) Limited | Real estate | 2022 |
| NFM Jeavons Lane Limited | Real estate | 2022 |
| NFM Newmans Court Limited | Real estate | 2022 |
| NFM Papermill Yard Limited | Real estate | 2022 |
| NFM Skipper House Limited | Real estate | 2022 |
| NFM ST Martin at Bale Court Limited | Real estate | 2022 |
| NFM ST Matthews Place Limited | Real estate | 2022 |
| NFM the Maltings (Dereham) Limited | Real estate | 2022 |
| NFM Tibbenham House Limited | Real estate | 2022 |
| Nfse Limited | Construction | 2006 |
| NG Acle Ltd | Transport & logistics | 2014 |
| NG Drayton Limited | Transport & logistics | 2016 |
| NG Fram Earl Ltd | Transport & logistics | 2015 |
| NG Harleston Ltd | Transport & logistics | 2015 |
| NG Holdings Norfolk Limited | Financial services | 2023 |
| NG North Walsham Ltd | Transport & logistics | 2019 |
| NG Properties (Norfolk) Ltd | Real estate | 2018 |
| NG Thunder Lane Ltd | Transport & logistics | 2014 |
| Ngaichun & Lams Limited | Real estate | 2022 |
| NGC Trading Limited | Transport & logistics | 2021 |
| Ngenius Ltd | Information & communication | 2019 |
| NGL Land and Property Maintenance Ltd | Administrative & support | 2026 |
| Ngongo Healthcare Ltd | Health & social care | 2018 |
| NH Norfolk House Ltd | Wholesale & retail | 2026 |
| Nhouse Commercial Limited | Other services | 2016 |
| NHP Supplies Ltd | Wholesale & retail | 2020 |
| NHV Helicopters Ltd | Transport & logistics | 2015 |
| Nibbs Events Limited | Arts & recreation | 2002 |
| NIC Chapman Ltd | Professional & scientific | 2020 |
| Nice Guys Norwich Ltd | Wholesale & retail | 2021 |
| Nicer Than Nice Ltd | Professional & scientific | 2024 |
| Niche (Norwich) Ltd | Wholesale & retail | 2018 |
| Niche Carpentry Ltd | Manufacturing | 2025 |
| Niche Construct Ltd. | Construction | 2019 |
| Niche Properties Ltd. | Construction | 2022 |
| Nicholas Court Residents Association Limited | Households | 2000 |
| Nicholas Hancox Acle Limited | Professional & scientific | 2014 |
| Nicholas Paul Consultancy Limited | Professional & scientific | 2025 |
| Nicholas Steele Limited | Health & social care | 2011 |
| Nicholas Taylor Properties Limited | Real estate | 1990 |
| Nicholls Tree Services Ltd | Administrative & support | 2026 |
| Nicholsco Ltd | Construction | 2026 |
| Nick Asker Ltd | Education | 2011 |
| Nick Esdaile Limited | Information & communication | 2011 |
| Nick Hindle Stonemasons Limited | Manufacturing | 2018 |
| Nick Nelson Garage Services Limited | Professional & scientific | 2022 |
| Nick Pearce Design Ltd | Professional & scientific | 2025 |
| Nick Read Photography Ltd | Professional & scientific | 2012 |
| Nick Treadaway Consulting Limited | Professional & scientific | 2012 |
| Nickinson Medical Services Limited | Health & social care | 2018 |
| Nicky Burgis Marketing Consultancy Limited | Professional & scientific | 2024 |
| Nicoara Ltd | Construction | 2015 |
| Nicola Gary Properties Ltd | Real estate | 2007 |
| Nicole's Salon Ltd | Other services | 2022 |
| Nicolondon Ltd | Wholesale & retail | 2019 |
| Nicusor Oana Ltd | Transport & logistics | 2016 |
| Nicutam Ltd | Transport & logistics | 2020 |
| Nideeshwaram Ltd | Health & social care | 2021 |
| Nigel Chilvers Heating Ltd | Professional & scientific | 2015 |
| Nigel Cutting (Windows & Doors) Limited | Construction | 2007 |
| Nigel Farrow Cars Ltd | Wholesale & retail | 2002 |
| Nigel Metcalf Limited | Construction | 2014 |
| Nigel Youngman Limited | Professional & scientific | 2009 |
| Nightingale Homecare East Sussex Limited | Health & social care | 2009 |
| Nightingale Homecare Group Ltd | Health & social care | 2012 |
| Nightingale Homecare Norfolk Ltd | Administrative & support | 2010 |
| Nightingale Homecare Suffolk Ltd | Health & social care | 2019 |
| Nightjar Software Limited | Information & communication | 2008 |
| NIK Developments Ltd | Construction | 2011 |
| Nikemda Ltd | Other services | 2017 |
| Nikiti Limited | Information & communication | 2015 |
| Nilab Pizza Ltd | Hospitality | 2024 |
| Nilecost Limited | Real estate | 2007 |
| Nimbl Digital Limited | Information & communication | 2020 |
| Nimble Management Limited | Professional & scientific | 2017 |
| Nimbus Hosting Ltd. | Information & communication | 2010 |
| Nimbus Software and Data Ltd | Information & communication | 2025 |
| Nimbus Software Limited | Information & communication | 2010 |
| Nina App Ltd | Other services | 2026 |
| Ninan Properties Ltd | Real estate | 2022 |
| Ninashas Limited | Extraterritorial | 2018 |
| Nine Designs Ltd | Wholesale & retail | 2025 |
| Ninth Cloud Club Ltd | Manufacturing | 2025 |
| Nipper Skipper Limited | Wholesale & retail | 2013 |
| Nisbet Access Solutions Limited | Other services | 2011 |