| N K Motors (Fast Fit) Limited | Real estate | 1994 |
| N Mcardle Consultancy Limited | Professional & scientific | 2019 |
| N S Ceilings Limited | Financial services | 2011 |
| N S Electrical (Derbyshire) Limited | Construction | 2023 |
| N Walker Properties Ltd | Real estate | 2025 |
| N&W Domestic Cleaning Service Ltd | Administrative & support | 2019 |
| N-Act.Io Ltd | Information & communication | 2025 |
| N-Core.Io Ltd | Information & communication | 2025 |
| N-Vite.Io Ltd | Information & communication | 2025 |
| N. D. K. Bowman Limited | Financial services | 2003 |
| N.E.S. IT Services Limited | Other services | 2003 |
| N.G.S. Corporate Services Limited | Administrative & support | 1994 |
| N.T.H. Projects Ltd | Construction | 2013 |
| N2 Builders Ltd | Construction | 2026 |
| N2 Development Construction Ltd | Construction | 2023 |
| N47 CP Ltd | Financial services | 2022 |
| N7N Ltd | Information & communication | 2012 |
| Naas Housing Limited | Real estate | 2025 |
| Naawe Limited | Wholesale & retail | 2024 |
| NAB Developments Ltd | Real estate | 2025 |
| NAD Trefoil Ltd | Professional & scientific | 2019 |
| Nadee's Pizza Limited | Hospitality | 2024 |
| Nadeem Transports Ltd | Transport & logistics | 2025 |
| Nadee’S Kitchen Limited | Hospitality | 2023 |
| Nadolny Property Ltd | Real estate | 2024 |
| Nagra Properties & Development Ltd | Real estate | 2026 |
| NAH Investments Limited | Construction | 2014 |
| Naija Foodies Ltd | Hospitality | 2025 |
| Naija Mums in Derby CIC | Hospitality | 2026 |
| Naija UK Connect Ltd | Information & communication | 2024 |
| Nail Knowledge Limited | Information & communication | 2025 |
| Nailer Consulting Limited | Professional & scientific | 2009 |
| Nailer Properties Limited | Real estate | 2013 |
| Nails, Beauty & Training by Janine Limited | Education | 2024 |
| Nairb Air Limited | Water & waste | 1979 |
| NAJ Roofing Ltd | Construction | 2022 |
| Nalini Medpro Ltd | Health & social care | 2023 |
| Namco Finance Limited | Professional & scientific | 1979 |
| Nameloc Training Consultancy Limited | Education | 2014 |
| Names ARE US Limited | Professional & scientific | 1997 |
| Nami Home Ltd | Wholesale & retail | 2023 |
| Namigs Hair Salon Ltd | Other services | 2025 |
| Nanar Ltd | Hospitality | 2025 |
| Nancy Investments Ltd | Real estate | 2023 |
| Napolino Pizza Limited | Hospitality | 2026 |
| Nargis Batool Limited | Wholesale & retail | 2025 |
| Narwhal Investment Limited | Financial services | 2025 |
| NAS Media Limited | Professional & scientific | 2015 |
| Nascare Limited | Health & social care | 2014 |
| Nash - Equestrian Enterprises Ltd | Manufacturing | 2024 |
| Nasrins Ltd | Wholesale & retail | 2025 |
| Nassa Care Limited | Health & social care | 2023 |
| Nassh Healthcare Ltd | Health & social care | 2013 |
| NAT Go Ltd | Administrative & support | 2024 |
| Natali Trading Limited | Wholesale & retail | 2024 |
| Natalia Gorecka Ltd | Construction | 2024 |
| Natalia Rafi Ltd | Manufacturing | 2020 |
| Natalie Anne Hill Limited | Other services | 2018 |
| Natasha Derbyshire Ltd | Hospitality | 2025 |
| Nater Protective Leisurewear Ltd | Manufacturing | 2026 |
| Nater Storage Solutions Ltd | Transport & logistics | 2026 |
| Nath Healthcare Ltd | Health & social care | 2026 |
| Nathan Actuarial Limited | Professional & scientific | 2009 |
| Nathan Chilton Sleep and Wellbeing Ltd | Health & social care | 2025 |
| Nathan Medicals Ltd | Wholesale & retail | 2023 |
| Nathaniel Day Property Limited | Real estate | 2025 |
| National Auto Solutions Ltd | Wholesale & retail | 2023 |
| National Care Providers Ltd | Health & social care | 2016 |
| National Compliance Training Ltd | Education | 2017 |
| National Decking Services Limited | Construction | 2017 |
| National Drainage Solutions Ltd | Administrative & support | 2026 |
| National Energy Solutions Ltd | Construction | 2019 |
| National Housing UK Ltd | Real estate | 2021 |
| National Management Ltd | Other services | 2020 |
| National Management TA Ltd | Real estate | 2023 |
| National Taekwondo Club - Derby | Health & social care | 2021 |
| National Trade Cars (Service Centres) Limited | Wholesale & retail | 2025 |
| National Trade Cars Ltd | Wholesale & retail | 2024 |
| National Works Ltd | Other services | 2026 |
| Nationstays Limited | Hospitality | 2023 |
| Nationwide Consultancy and Management Services Ltd | Professional & scientific | 2018 |
| Nationwide Transfers Ltd | Transport & logistics | 2023 |
| Natt Transport Ltd | Transport & logistics | 2023 |
| Natteas Ltd | Wholesale & retail | 2021 |
| Nattyroots Ital Juice Limited | Manufacturing | 2019 |
| Naturacure Ltd | Wholesale & retail | 2024 |
| Natural Building Materials Limited | Extraterritorial | 1998 |
| Natural Building Store Ltd | Wholesale & retail | 2020 |
| Natural Farma Ltd | Agriculture & fishing | 2017 |
| Natural Light Windows & Doors Ltd | Construction | 2022 |
| Natural Smiles Dental Care Limited | Health & social care | 2011 |
| Natural Waxing Ltd | Other services | 2016 |
| Nature Nurture Nurseries Limited | Education | 2014 |
| Nature's Genie Ltd | Wholesale & retail | 2020 |
| Naturerise Ltd | Agriculture & fishing | 2026 |
| Nauman Medical Services Ltd | Health & social care | 2018 |
| Nautic Strategic Limited | Professional & scientific | 2023 |
| Nautico Holdings Ltd | Professional & scientific | 2024 |
| Nava Trading Limited | Wholesale & retail | 2015 |
| Navam Services Limited | Administrative & support | 2012 |