| Northgate Lodge Stud Limited | Arts & recreation | 1982 |
| Northgate Residential Ltd | Health & social care | 2021 |
| Northline Advisory Ltd | Professional & scientific | 2026 |
| Northmanor Properties Limited | Construction | 2010 |
| Northmead Developments Limited | Construction | 2023 |
| Northmead Holdings Limited | Construction | 2025 |
| Northmead Homes (Maple Lane) Limited | Construction | 2020 |
| Northmead Homes (York) Limited | Construction | 2025 |
| Northmead Homes Limited | Construction | 2003 |
| Northminster Developments Limited | Real estate | 2012 |
| Northminster Holdings Limited | Professional & scientific | 2011 |
| Northminster Land Limited | Construction | 2007 |
| Northminster Limited | Construction | 2011 |
| Northminster Properties Limited | Construction | 1995 |
| Northmount Limited | Construction | 1990 |
| Northpoint Fire and Security Ltd | Administrative & support | 2022 |
| Northrise Investments Ltd | Hospitality | 2026 |
| Northshire UK Properties Ltd | Hospitality | 2026 |
| Northward Studio Ltd | Information & communication | 2021 |
| Northwind Vector Holdings Ltd | Financial services | 2026 |
| Northwood (York) Limited | Real estate | 2003 |
| Northwood Capital Limited | Real estate | 2024 |
| Northwoods Farming Ltd | Agriculture & fishing | 2003 |
| Northzana Limited | Professional & scientific | 2018 |
| Norton & Co Accountancy Limited | Professional & scientific | 2014 |
| Norton & Co Holding Company Limited | Financial services | 2014 |
| Norton Interiors Limited | Construction | 2008 |
| Nortron Ltd | Other services | 2019 |
| Norwood Consultancy Services Limited | Information & communication | 2019 |
| Noseyfox Limited | Wholesale & retail | 2013 |
| Nostell Estate Property Company | Real estate | 2019 |
| NOT a Square Ltd | Professional & scientific | 2023 |
| NOT Just a Robot Limited | Professional & scientific | 2015 |
| Notiq Ltd | Manufacturing | 2026 |
| Nous Limited | Information & communication | 1997 |
| Nova Aetas Energy Limited | Professional & scientific | 2017 |
| Nova House Property Management Limited | Households | 2017 |
| Novascape Limited | Information & communication | 2016 |
| Novella Learning Ltd | Professional & scientific | 2015 |
| Novella Studio Ltd | Information & communication | 2025 |
| Novncd Limited | Agriculture & fishing | 1977 |
| Novum Growth Partners Ltd | Information & communication | 2024 |
| Novum Personnel Ltd | Administrative & support | 2019 |
| Novus -In-Store Solutions Ltd | Professional & scientific | 2020 |
| Noxdown Limited | Manufacturing | 2015 |
| Noxrecon Ltd | Information & communication | 2025 |
| Noyo Group Limited | Hospitality | 2025 |
| NP Atlantic Ltd | Manufacturing | 2020 |
| NP Lets Limited | Hospitality | 2025 |
| NPC & Ghsr Ltd | Real estate | 2025 |
| NPD Consultants Limited | Professional & scientific | 2013 |
| NPH Ltd | Education | 2016 |
| Npowered Limited | Professional & scientific | 2002 |
| NPS Consulting (UK) Limited | Other services | 2012 |
| NR (York) Limited | Real estate | 2019 |
| NRG Healing Ltd | Wholesale & retail | 2017 |
| NS Series Ltd | Arts & recreation | 2021 |
| NS Surveying Ltd | Professional & scientific | 2015 |
| NSB Joinery Ltd | Construction | 2019 |
| Nsdh (Copmanthorpe) Ltd | Real estate | 2021 |
| NSJ Phillips Ltd | Professional & scientific | 2019 |
| NSM Engineering Consultancy Limited | Professional & scientific | 2020 |
| NSW Capital Ltd | Real estate | 2025 |
| NSW Ventures Ltd | Real estate | 2025 |
| NT Middleton Financial Services Ltd | Professional & scientific | 2020 |
| Ntmj Property Limited | Real estate | 2026 |
| NU Mindset Limited | Health & social care | 2020 |
| NU Space Homes (Bilbrough) Limited | Construction | 2019 |
| NU Space Homes Group Limited | Construction | 2018 |
| NU Space Homes Limited | Construction | 2017 |
| NU York Printing Limited | Manufacturing | 2014 |
| Nuevo Aesthetics Ltd | Other services | 2024 |
| Nufit Foods Limited | Professional & scientific | 2014 |
| Nuleaf Energy Limited | Professional & scientific | 2020 |
| Nulife Solutions Ltd | Professional & scientific | 2024 |
| Nulook Roofing Ltd | Construction | 2025 |
| Number 83 Architectural and Design Services Ltd | Professional & scientific | 2023 |
| Number FUN Limited | Education | 2015 |
| Number One York LLP | | 2023 |
| Numbersixty Limited | Wholesale & retail | 2017 |
| Nun-Appleton Farm | Extraterritorial | 1982 |
| Nunnery Lane Limited | Real estate | 2025 |
| Nunns Media & Services Ltd | Professional & scientific | 2023 |
| Nunthorpe Services Ltd | Construction | 2018 |
| Nuovaluna Aesthetics Limited | Professional & scientific | 2025 |
| Nura Companion Ltd | Information & communication | 2025 |
| Nurture Bookkeeping Ltd | Professional & scientific | 2023 |
| Nutripress Limited | Wholesale & retail | 2019 |
| Nutrire Educare Ltd | Professional & scientific | 2024 |
| Nuxdo Ltd | Wholesale & retail | 2018 |
| Nuzzlets | Agriculture & fishing | 2007 |
| Nvalue UK Limited | Professional & scientific | 2026 |
| NVD Group Academy Ltd | Information & communication | 2025 |
| NVH Ltd | Extraterritorial | 2013 |
| NWD Group Ltd | Extraterritorial | 2023 |
| Nwrf Ltd | Information & communication | 2023 |
| NX Series Ltd | Arts & recreation | 2021 |
| Nxcc Ltd | Arts & recreation | 2021 |
| NYA Limited | Health & social care | 2025 |
| NYC Properties Ltd | Real estate | 2025 |