| Northstone Projects Ltd | Construction | 2026 |
| Northstone Property Group Ltd | Real estate | 2024 |
| Northtech Fleet Solutions Ltd | Wholesale & retail | 2025 |
| Northumberland Holdings Ltd | Extraterritorial | 2016 |
| Northvale Developments Holdings Limited | Construction | 2020 |
| Northvale Developments Limited | Construction | 2020 |
| Northvend Ltd | Wholesale & retail | 2025 |
| Northview Creative Limited | Professional & scientific | 2003 |
| Northview Investments Limited | Financial services | 2020 |
| Northway GAS Services Ltd | Construction | 2025 |
| Northways Associates Limited | Information & communication | 2017 |
| Northwest Business Park (Management) Limited | Real estate | 1989 |
| Northwest London College Ltd | Education | 2025 |
| Northwest Parks Limited | Hospitality | 2020 |
| Northwestern Ltd | Manufacturing | 2023 |
| Northwolds Richardson Group Limited | Manufacturing | 1978 |
| Northwood (Leeds) Limited | Real estate | 2006 |
| Northwood Design & Print Ltd | Professional & scientific | 2020 |
| Norton and Company Property Asset Management LLP | | 2021 |
| Norton Chase Estates Ltd | Real estate | 2025 |
| Norton Connor Limited | Professional & scientific | 2010 |
| Norton ET AL Limited | Administrative & support | 2012 |
| Norton Group of Companies Limited | Wholesale & retail | 2019 |
| Norton Loxley Limited | Administrative & support | 2018 |
| Norton Manor Care Limited | Health & social care | 2002 |
| Norton Plumbing Limited | Construction | 2014 |
| Norvik Ventures Limited | Administrative & support | 2026 |
| Norville - Steel Tax Consultants Ltd | Professional & scientific | 2013 |
| Norwell Care Ltd | Health & social care | 2019 |
| Norwood Partners Ltd | Health & social care | 2025 |
| Norwood Westgate Limited | Real estate | 2019 |
| NOS Group Ltd | Wholesale & retail | 2026 |
| Nosa Auto Parts UK Ltd. | Wholesale & retail | 2017 |
| Nosh (Leeds) Limited | Other services | 2023 |
| Nosh Inn Foods Limited | Hospitality | 2021 |
| Nosh Inn Limited | Hospitality | 2025 |
| Nosha Solutions Limited | Water & waste | 2025 |
| Noskels Freshclean Solutions Ltd | Administrative & support | 2026 |
| Nosreme IT Ltd | Information & communication | 2014 |
| Nosstrom Ltd | Real estate | 2019 |
| Nostalgiacoffeecompany Ltd | Hospitality | 2020 |
| Nostrop Storage Limited | Transport & logistics | 2018 |
| NOT in Love Ltd | Manufacturing | 2014 |
| NOT Just an FD Ltd | Professional & scientific | 2023 |
| NOT Just Numbers Limited | Professional & scientific | 2011 |
| NOT Swiss Cheese Limited | Wholesale & retail | 2021 |
| Not-A-Porter Limited | Professional & scientific | 2016 |
| Notbakeryco Ltd | Manufacturing | 2025 |
| Noted by Nema Ltd | Manufacturing | 2025 |
| Noteman Group Ltd | Information & communication | 2023 |
| Noteman Property Ltd | Real estate | 2019 |
| Notepad Web Development Ltd | Information & communication | 2016 |
| Nothara Tradings UK Limited | Wholesale & retail | 2024 |
| Nothmann IT Consulting Ltd | Information & communication | 2025 |
| Notoku Ltd | Wholesale & retail | 2026 |
| Notorious Tech Limited | Wholesale & retail | 2019 |
| Notts Steel Ltd | Manufacturing | 2025 |
| Nouba Borderless Accounts Ltd | Administrative & support | 2025 |
| Nour Traders Ltd | Wholesale & retail | 2022 |
| Nourish Health Ltd | Hospitality | 2025 |
| Nouveau Beauty Group Ltd | Other services | 2004 |
| Nouveau Lashes Limited | Other services | 2004 |
| Noux Talent Ltd | Administrative & support | 2023 |
| Nova & Co Holdings Ltd | Financial services | 2021 |
| Nova Almonds Limited | Wholesale & retail | 2022 |
| Nova AMS Ltd | Wholesale & retail | 2024 |
| Nova Design Yorkshire Ltd | Professional & scientific | 2022 |
| Nova Display Limited | Manufacturing | 1988 |
| Nova Energy Solutions Limited | Energy | 2017 |
| Nova Healthcare Ltd | Health & social care | 2008 |
| Nova Luxury Homes Limited | Real estate | 2025 |
| Nova Management Services Limited | Administrative & support | 2020 |
| Nova Packaging Limited | Manufacturing | 1977 |
| Nova Silva Ltd | Professional & scientific | 2024 |
| Nova Speech Therapy Limited | Health & social care | 2024 |
| Nova-Con Developments Ltd | Construction | 2025 |
| Novaclean Group UK Ltd | Administrative & support | 2026 |
| Novaheat Solutions Ltd | Construction | 2025 |
| Novara Prime Property Group Limited | Real estate | 2026 |
| Novareach ADS Ltd | Professional & scientific | 2025 |
| Novaris Search Limited | Administrative & support | 2023 |
| Novastat Ltd | Information & communication | 2021 |
| Novatera Solutions Limited | Construction | 2025 |
| Novatimber Limited | Wholesale & retail | 2025 |
| Novavida Hub: Integrative Holistic Therapies Ltd | Health & social care | 2023 |
| Novavoir Ltd | Professional & scientific | 2024 |
| Novella Satcoms Limited | Manufacturing | 1997 |
| Novi Futures Limited | Other services | 2025 |
| Novi Global Ltd | Professional & scientific | 2024 |
| Novi Ventures Ltd | Administrative & support | 2023 |
| Noville Ltd | Information & communication | 2025 |
| Novo Integration Ltd | Professional & scientific | 2013 |
| Novosteen Ltd | Other services | 2018 |
| Novotech Enterprise Ltd | Wholesale & retail | 2019 |
| Novum Executive Limited | Administrative & support | 2023 |
| Novus Clinical Ltd | Wholesale & retail | 2022 |
| Novus Group Leeds Ltd | Financial services | 2024 |
| NOW & Next Leeds Ltd | Other services | 2024 |
| NOW Consultancy Ltd | Professional & scientific | 2012 |
| NOW Property Consultancy Limited | Construction | 2024 |