| Mulberry Housing Ltd | Real estate | 2025 |
| Mule Ndeme Limited | Health & social care | 2022 |
| Multicolour Limited | Manufacturing | 2001 |
| Muro Ltd | Hospitality | 2025 |
| Mwami Ventures Ltd | Health & social care | 2020 |
| Mystery Jersey King Ltd | Wholesale & retail | 2021 |
| N K Display Ltd | Construction | 2020 |
| N T R Design Limited | Construction | 2023 |
| N&L Heating Ltd | Construction | 2025 |
| N.H. Textiles Limited | Wholesale & retail | 2004 |
| Nasery Health Ltd | Health & social care | 2023 |
| Nationwide Electric Gates Ltd | Manufacturing | 2024 |
| Naturally Built Performance Ltd | Arts & recreation | 2025 |
| Nautical Renewal Ltd | Real estate | 2024 |
| Navvy Equipment Limited | Manufacturing | 2019 |
| NB Truck & Plant Ltd | Wholesale & retail | 2024 |
| NBF Electrical Ltd | Construction | 2020 |
| NBY3 Healthcare Ltd | Public administration | 2023 |
| Ndbf Holdings Limited | Health & social care | 2022 |
| Neal Dawson Ltd | Wholesale & retail | 2021 |
| Nedsram Limited | Transport & logistics | 2021 |
| Neil Attewell Business Services Limited | Professional & scientific | 2013 |
| Neil Johnson Sports Lighting Consultants Limited | Professional & scientific | 2013 |
| Nemesis Tactical Ltd | Manufacturing | 2021 |
| Neptune Fisheries 2025 Ltd | Hospitality | 2025 |
| Nest Interiors Limited | Extraterritorial | 2002 |
| Neville Heating Ltd | Construction | 2025 |
| New Cross Arts Centre C.I.C. | Wholesale & retail | 2025 |
| Newcross Consulting Limited | Information & communication | 2017 |
| Newgate Catering Ltd | Hospitality | 2026 |
| Newland Roofing Ltd | Construction | 2021 |
| Newlands Home Owners Ltd | Households | 2020 |
| Newpress Solutions Limited | Information & communication | 2017 |
| Newstreet Accounting Limited | Professional & scientific | 2026 |
| Newstreet Financial Services Limited | Administrative & support | 2016 |
| Newton Replicas (Midlands) Limited | Manufacturing | 2016 |
| Next Phase Business Consultancy Ltd | Professional & scientific | 2024 |
| Next Phase Property Solutions Ltd | Real estate | 2024 |
| Nextphase Construction Consultancy Ltd | Professional & scientific | 2025 |
| Nexus Composite Engineering Ltd | Professional & scientific | 2021 |
| Nexus Equity Investments Ltd | Information & communication | 2025 |
| Nexvio Tech Ltd | Information & communication | 2026 |
| Nexxgen Limited | Administrative & support | 2017 |
| NF Transport & Sales Limited | Financial services | 2025 |
| NF Transport & Sons Limited | Administrative & support | 2025 |
| NF Transport, Plant and Grab Hire Ltd | Administrative & support | 2021 |
| Nfet Ltd | Administrative & support | 2025 |
| NGH Solutions Ltd | Professional & scientific | 2022 |
| Nicholas Abson Associates Limited | Professional & scientific | 2019 |
| Nicolae Transportation Limited | Transport & logistics | 2021 |
| NIM World Ltd | Arts & recreation | 2020 |
| Nithu & Lathu Ltd | Wholesale & retail | 2018 |
| NJ Window Cleaning Services Limited | Administrative & support | 2024 |
| Njattewell Business Management Limited | Professional & scientific | 2025 |
| NJS Mentoring Ltd | Education | 2025 |
| NL Proclean Ltd | Administrative & support | 2024 |
| NLP International Conference Ltd | Administrative & support | 2016 |
| NLP Professional Standards Limited | Administrative & support | 2021 |
| NLP Qualifications Ltd | Professional & scientific | 2005 |
| Nmin Investments Ltd | Real estate | 2018 |
| NO Ordinary Media Limited | Professional & scientific | 2018 |
| Nomad Discovery Ltd | Administrative & support | 2025 |
| Nomad Roof Tents Limited | Wholesale & retail | 2026 |
| Noon Group Holdings Limited | Financial services | 2020 |
| Noon's Emporium Ltd | Wholesale & retail | 2025 |
| Noonet Ltd | Information & communication | 2022 |
| Norris Motor Sport Limited | Wholesale & retail | 2006 |
| North East Reinforcement Limited | Construction | 2003 |
| Northstar Manufacturing Solutions Ltd | Professional & scientific | 2022 |
| Norton Tool Hire Ltd | Administrative & support | 2026 |
| Nosey Parker Detection Ltd | Administrative & support | 2023 |
| Nottingham and Nottinghamshire Licensed Victuallers Limited | Hospitality | 1992 |
| Nottingham Diamond Limited | Hospitality | 2024 |
| Nottingham Electronic Assembly Ltd | Other services | 2021 |
| Nottingham Pet Cremation Services Ltd | Other services | 2025 |
| Nottingham Pianos Ltd | Transport & logistics | 2021 |
| Novasphere Global Limited | Wholesale & retail | 2025 |
| Novolegno Limited | Professional & scientific | 2015 |
| Novus Distribution Ltd | Wholesale & retail | 2020 |
| Nuflor Ltd | Construction | 2025 |
| Nurtured Learning Solutions and Consultancy Ltd | Education | 2025 |
| Nutrakap Ltd | Manufacturing | 2015 |
| Nytrac Distribution Limited | Information & communication | 2008 |
| NYW Logistics Ltd | Transport & logistics | 2025 |
| Oak Hallam Holdings Limited | Financial services | 2019 |
| Oakdene Cars Limited | Wholesale & retail | 2019 |
| Oakerthorpe Accountancy Limited | Professional & scientific | 2007 |
| Oakham Beauty Suite Limited | Other services | 2026 |
| Ocdon Group Ltd | Construction | 2021 |
| Ocean Breeze Retreats Ltd | Hospitality | 2025 |
| OFF Road Truck Specialists Limited | Wholesale & retail | 1987 |
| Ogston BEE Farm Limited | Agriculture & fishing | 2020 |
| Ogston Developments Limited | Construction | 2015 |
| Ogston Forest School Ltd | Education | 2026 |
| Ohana Homes Limited | Professional & scientific | 2013 |
| Oldroyd Associates Limited | Professional & scientific | 2003 |
| Omni Training & Consultancy Ltd | Administrative & support | 2020 |
| Omnitex Ltd | Manufacturing | 2025 |
| ON Point Scaffolding Ltd | Construction | 2024 |
| One Almond Analytics Limited | Professional & scientific | 2024 |