| Nest Property Law Limited | Professional & scientific | 2025 |
| Nestige Media Ltd | Professional & scientific | 2022 |
| NET Safety U.K. Ltd. | Construction | 2007 |
| Nethro Medical Ltd | Health & social care | 2014 |
| Nettlestead Consulting Ltd | Professional & scientific | 2012 |
| Nettworks Management Limited | Administrative & support | 2023 |
| Network Cranes Limited | Wholesale & retail | 2018 |
| Nevis Property Development Ltd | Professional & scientific | 2016 |
| New Business Accelerator Limited | Professional & scientific | 2013 |
| New Cars Online Ltd | Administrative & support | 2021 |
| New Directions Management Services Limited | Professional & scientific | 2017 |
| New Future Training Limited | Education | 2018 |
| New Grimsby HK Limited | Hospitality | 2024 |
| New Heights Building Services Ltd | Construction | 2004 |
| New Lucky Dragon Takeaway Ltd | Hospitality | 2021 |
| New Lucky Rainbow Limited | Hospitality | 2025 |
| New Mills Properties Limited | Real estate | 2012 |
| New Star Heneage Ltd | Hospitality | 2020 |
| New Waltham Primary Academy Limited | Education | 2011 |
| Newbold Court (Cleethorpes) Management Company Limited | Households | 2021 |
| Newby Investments Limited | Real estate | 2017 |
| Newby Leisure Limited | Construction | 2002 |
| Newchase House - Management Co Limited | Financial services | 2026 |
| Newchase Limited | Construction | 1986 |
| Newdore Limited | Real estate | 2013 |
| Newell Scaffolding Solutions Limited | Construction | 2025 |
| Newglaze Limited | Construction | 1994 |
| Newick Building Services Limited | Construction | 2017 |
| Newman Surveying and Development Ltd | Construction | 2024 |
| Newscope Trading Limited | Financial services | 2009 |
| Newsflash Media Limited | Financial services | 2012 |
| Newton Systems Ltd. | Information & communication | 2016 |
| Nexar Industrial Limited | Wholesale & retail | 2025 |
| Nexar Solutions Limited | Health & social care | 2010 |
| Nexify London Limited | Wholesale & retail | 2026 |
| Next GEN Fire Solutions Ltd | Public administration | 2026 |
| Next Generation Software Ltd | Information & communication | 2025 |
| Next Stage Community Theatre Limited | Arts & recreation | 2018 |
| Nexus Building Team Ltd | Construction | 2016 |
| Nexus Electrical Solutions Ltd | Construction | 2021 |
| Nexus Smart Ltd | Wholesale & retail | 2026 |
| Nexus Worx Limited | Public administration | 2025 |
| Nezlec Ltd | Construction | 2024 |
| NFA Ltd | Information & communication | 2014 |
| Nfcq Ltd | Education | 2023 |
| NFL Services Ltd | Hospitality | 2025 |
| NG UK Associates Ltd | Other services | 2014 |
| Ngdh Ltd | Real estate | 2025 |
| Nguvu Global Limited | Wholesale & retail | 2019 |
| NHH Healthcare Ltd | Health & social care | 2025 |
| NHL Engineering Services Ltd | Professional & scientific | 2025 |
| Niche Concept Ltd | Wholesale & retail | 2006 |
| Nicholas Dillon Services Ltd | Professional & scientific | 2024 |
| Nicholls Civil Engineering Ltd | Construction | 2025 |
| Nick England Studios Limited | Information & communication | 2018 |
| Nicki Fulton Therapy Limited | Health & social care | 2021 |
| Nickle Holdings Limited | Professional & scientific | 2014 |
| Nicnats Properties Ltd | Real estate | 2021 |
| Nicole Hudson Hairdressing Ltd | Other services | 2024 |
| Nicole One Ltd | Transport & logistics | 2018 |
| Nicosia Scarborough Limited | Hospitality | 2025 |
| Nidd & SON Limited | Wholesale & retail | 1939 |
| Niftyhybrid Ltd | Information & communication | 2024 |
| Nigel Stead Fishing Limited | Agriculture & fishing | 2002 |
| Nigel Towse Roofing Limited | Other services | 2011 |
| Nightshadeagcy Ltd | Professional & scientific | 2023 |
| Nihilithtech Ltd | Information & communication | 2025 |
| Nikola 213 Ltd | Transport & logistics | 2021 |
| Nimbic Sustainability Consulting Ltd | Professional & scientific | 2025 |
| Nimbl Creative Ltd | Professional & scientific | 2018 |
| Nirvana Healthcare Ltd | Health & social care | 2013 |
| NJK9 Limited | Administrative & support | 2023 |
| NK Kokot Ltd | Transport & logistics | 2019 |
| NK Supplies Limited | Wholesale & retail | 2014 |
| NM Property Developers Ltd | Construction | 2017 |
| NMF Plumbing Heating and Renewables Ltd | Construction | 2026 |
| Noah Alma Clinical Services Ltd | Health & social care | 2025 |
| Noah Trans Ltd | Transport & logistics | 2024 |
| Nohah Studios Ltd | Wholesale & retail | 2024 |
| Noir Blanc Holdings Ltd | Professional & scientific | 2023 |
| Nolan Interiors Limited | Professional & scientific | 2021 |
| Nomad & Co GY Ltd | Hospitality | 2025 |
| Noon Haulage Limited | Transport & logistics | 2017 |
| Nor-Cargo Limited | Transport & logistics | 2008 |
| Nor-Lait Promotions Limited | Arts & recreation | 2026 |
| Norburn Estates Limited | Construction | 2017 |
| Norfolk Lane Cold Stores (Grimsby) Ltd | Administrative & support | 2021 |
| Norman Galyer Motors Ltd | Wholesale & retail | 2015 |
| North Coates Flying Club Limited | Arts & recreation | 1997 |
| North Cotes Butts Ltd | Arts & recreation | 2021 |
| North Country Clean Ltd | Administrative & support | 2026 |
| North East Lincolnshire Carelink | Health & social care | 1995 |
| North East Lincolnshire Properties Limited | Real estate | 2002 |
| North East Lincolnshire Vcse Alliance | Health & social care | 2015 |
| North East Lincolnshire Women's AID | Other services | 2002 |
| North East Lincs Grab Hire and Aggregates Ltd | Water & waste | 2025 |
| North East Lincs Properties Ltd | Real estate | 2019 |
| North Lets Limited | Real estate | 2008 |
| North Lincs BIO Fuels Limited | Professional & scientific | 2018 |
| North Lincs Tyres Limited | Wholesale & retail | 1992 |