| Nikolay Elmasev Limited | Health & social care | 2014 |
| Niks Lettings Ltd | Real estate | 2024 |
| Nikwol Ltd | Professional & scientific | 2025 |
| Nildo Ltd | Hospitality | 2025 |
| Nile Medical Consultancy Ltd | Health & social care | 2024 |
| Nile Villa Limited | Professional & scientific | 2015 |
| Niman Electrical Services Limited | Manufacturing | 2025 |
| Nimbus Digital Solutions Ltd | Information & communication | 2008 |
| Nimisha Chaudhry Limited | Health & social care | 2024 |
| Nimius Limited | Information & communication | 2018 |
| Nimmo Ltd | Wholesale & retail | 2022 |
| Nimrod Consulting Ltd | Professional & scientific | 2022 |
| Nimssie Ltd | Public administration | 2024 |
| Nimuk Engineering and Servicing Limited | Construction | 2025 |
| NIN Consulting Ltd | Professional & scientific | 2023 |
| Nineteen Twelve Holdings Limited | Professional & scientific | 2015 |
| Nineteen Twelve Inc Limited | Information & communication | 2017 |
| Ninety Eight by Four Company Limited | Real estate | 1999 |
| Ninety SIX Creative Limited | Manufacturing | 2014 |
| Ninety: TEN Productions Limited | Information & communication | 2001 |
| Nineveh Investments Ltd | Wholesale & retail | 2020 |
| Ninira Limited | Real estate | 2018 |
| Ninja Division Ltd | Wholesale & retail | 2018 |
| Ninjah Ltd | Wholesale & retail | 2020 |
| Ninville Integrated Services Limited | Wholesale & retail | 2023 |
| NIP Property Advisors Limited | Financial services | 2016 |
| Nirant Limited | Hospitality | 2023 |
| Nirmata Services Ltd | Other services | 2026 |
| Nirmlab Limited | Professional & scientific | 2011 |
| Nirvana Driving School Ltd | Education | 2016 |
| Nisha Pharma Limited | Health & social care | 2024 |
| Nishtara Consulting Ltd | Information & communication | 2012 |
| Niso Investments Ltd | Real estate | 2020 |
| Nisot Golden Bakes Ltd | Manufacturing | 2025 |
| Nisot Properties Limited | Real estate | 2021 |
| Nissarana Limited | Information & communication | 2004 |
| Nissi Gourmet Burgers Limited | Hospitality | 2020 |
| Nisson Limited | Wholesale & retail | 2020 |
| Nistawi Women CIC | Education | 2024 |
| Nita's Food Limited | Manufacturing | 2026 |
| Nittylooks Ltd | Other services | 2026 |
| Nivek Surveying Services Ltd | Construction | 2023 |
| Niven Property Management Ltd | Real estate | 2021 |
| Nixo Ltd | Information & communication | 2016 |
| Nixyrew Properties Ltd | Real estate | 2020 |
| NJ Buyline Ltd | Wholesale & retail | 2025 |
| NJ Lettings Limited | Real estate | 2024 |
| NJ Snowden Case Management Ltd | Health & social care | 2017 |
| NJ1 Properties Limited | Real estate | 2024 |
| NJB Finishes Limited | Construction | 2008 |
| NJB Properties (Nottingham) Ltd | Real estate | 2021 |
| NJB Trading Ltd | Wholesale & retail | 2026 |
| NJC Advisory Limited | Extraterritorial | 2015 |
| NJC Property Maintenance Ltd | Construction | 2012 |
| NJE Advisory Limited | Professional & scientific | 2023 |
| Njiwa Group Limited | Health & social care | 2025 |
| Njjjbb Property Group Ltd | Real estate | 2025 |
| NJK Tech Ltd | Information & communication | 2025 |
| NJP Designs Joinery & Furniture Ltd | Manufacturing | 2019 |
| NJR Food & Entertainment Limited | Hospitality | 2023 |
| NJS Medicals Ltd | Health & social care | 2025 |
| NJW Developments Ltd | Administrative & support | 2018 |
| NJW Pre-Cast Flooring Limited | Construction | 2017 |
| NK Animation Ltd | Arts & recreation | 2017 |
| NK Design Architects Ltd | Professional & scientific | 2021 |
| NK Elearning Services Ltd | Professional & scientific | 2013 |
| NK Oral-Care Services Ltd | Health & social care | 2023 |
| NK Overseas Ltd | Wholesale & retail | 2024 |
| NK Psychological Services Ltd | Health & social care | 2011 |
| NK90 Tech Ltd | Wholesale & retail | 2023 |
| Nkam Limited | Real estate | 2025 |
| NKC Consultancy Ltd | Education | 2022 |
| NKP Audio Ltd | Information & communication | 2026 |
| NLD PM Solutions Ltd | Professional & scientific | 2023 |
| Nlightnit Ltd | Information & communication | 2001 |
| Nlimaglobal Limited | Health & social care | 2021 |
| Nlls Ltd | Administrative & support | 2021 |
| NLR Parts Centre Limited | Wholesale & retail | 2022 |
| NLS Legal Limited | Education | 2014 |
| Nlsh Ltd | Financial services | 2022 |
| NLX Ltd | Administrative & support | 2019 |
| NM Consultants Ltd | Professional & scientific | 2015 |
| NM Electrix Limited | Extraterritorial | 2014 |
| NM Housing Limited | Real estate | 2025 |
| NM Security Ltd | Administrative & support | 2025 |
| NM Skin & Aesthetics Ltd | Other services | 2025 |
| NM1 Consultancy Ltd | Professional & scientific | 2021 |
| NMA Cooling Solutions Ltd | Other services | 2025 |
| Nmbp Investments Ltd | Real estate | 2023 |
| NMC Contracts Limited | Extraterritorial | 2017 |
| NMG Nottingham Ltd | Arts & recreation | 2014 |
| NMG Property (Midlands) Limited | Real estate | 2021 |
| NMR Bridgford Limited | Professional & scientific | 2020 |
| NMR Investments (Nottingham) Limited | Real estate | 2025 |
| NN Automations Ltd | Wholesale & retail | 2021 |
| NN JPS Limited | Health & social care | 2016 |
| NN1 Holdings Ltd | Real estate | 2019 |
| NNA Groundworks Limited | Water & waste | 2026 |
| NNF Holdings Limited | Financial services | 2018 |
| Nnpl Ltd | Real estate | 2011 |