| NR Design Creativity Ltd | Arts & recreation | 2020 |
| NR Sinclair Enterprises Ltd | Real estate | 2025 |
| NR Singh Ltd | Administrative & support | 2021 |
| NRG Lawyers Limited | Other services | 2021 |
| NRG Sense Limited | Administrative & support | 2008 |
| Nrgfuel Limited | Extraterritorial | 2010 |
| Nrkmw Limited | Wholesale & retail | 2023 |
| NRM Hair Ltd | Other services | 2023 |
| NRM Property Limited | Real estate | 2019 |
| NRP Nominees Limited | Professional & scientific | 2016 |
| NRR Estates Ltd | Real estate | 2025 |
| NRS Europe Limited | Manufacturing | 2022 |
| Nrsb Solutions Limited | Real estate | 2021 |
| Nrsl Holdings Limited | Financial services | 2017 |
| NS Corporate Group Ltd | Construction | 2025 |
| NS Events Group Ltd | Administrative & support | 2018 |
| NS Surfacing & Sons Ltd | Financial services | 2024 |
| Nsai Certification UK Limited | Professional & scientific | 2021 |
| NSB Property Group Limited | Real estate | 2026 |
| Nsbr Connect Ltd | Information & communication | 2024 |
| NSC Services Ltd | Construction | 2009 |
| Nscornwall Limited | Real estate | 2023 |
| NSD Group Limited | Financial services | 2024 |
| NSD Solutions Limited | Transport & logistics | 2020 |
| NSL (GR) Holdings Ltd | Other services | 2022 |
| NSO Logistics Limited | Manufacturing | 2025 |
| Nspine Limited | Other services | 2013 |
| NSS Associates Ltd | Health & social care | 2023 |
| NSS Groundworks Solutions Ltd | Construction | 2024 |
| NSS Holdings (Nottingham) Ltd | Extraterritorial | 2025 |
| NSS International Limited | Wholesale & retail | 2018 |
| Nswt Limited | Administrative & support | 2022 |
| NT Notts Construction Ltd | Construction | 2023 |
| NT Property Advisors Limited | Financial services | 2016 |
| NT35 DP Ltd | Wholesale & retail | 2022 |
| NT7 Enterprises Ltd | Hospitality | 2025 |
| Ntc-Formby Limited | Education | 2023 |
| Ntc-National Taekwondo Club (2024) Limited | Education | 2024 |
| NTC. Nash Traffic Consultancy Ltd | Professional & scientific | 2017 |
| Ntebbetwezimbe Ltd | Health & social care | 2022 |
| NTG Consultants Limited | Information & communication | 2014 |
| NTH Degree Developments Ltd | Construction | 2021 |
| NTH Degree Electrical Installation Services Limited | Construction | 2016 |
| NTH Degree Fire & Security Ltd | Administrative & support | 2022 |
| NTH North Ltd | Health & social care | 2019 |
| Ntini Promotions Ltd | Administrative & support | 2023 |
| NTM Breakdown Transport Ltd | Wholesale & retail | 2025 |
| NTM Property Investment Ltd | Real estate | 2026 |
| NTN Tradinng Ltd | Hospitality | 2025 |
| Ntombi Health Care Services Ltd | Health & social care | 2024 |
| Ntpet UK Limited | Wholesale & retail | 2023 |
| Ntpf Holdings Ltd | Financial services | 2017 |
| NTS 10 Ltd | Hospitality | 2025 |
| NTU Temporary Staff Limited | Other services | 2017 |
| NU Consultants (Nottingham) Ltd | Construction | 2017 |
| NU YU Beauty Rooms Limited | Other services | 1999 |
| NUDGE5 Ltd | Information & communication | 2026 |
| Nudu Hair Limited | Other services | 2011 |
| NUE Hoops Jewellery Ltd | Wholesale & retail | 2019 |
| Nuedawn Limited | Health & social care | 2024 |
| Nuerra Ltd | Other services | 2025 |
| Nueworx Limited | Information & communication | 2025 |
| NUG Labs Limited | Information & communication | 2026 |
| Nuke Creative Limited | Administrative & support | 2007 |
| Nuko LYL Ltd | Wholesale & retail | 2024 |
| Number 1 Vapes Ltd | Wholesale & retail | 2018 |
| Number 4U Limited | Professional & scientific | 2011 |
| Number 5 Newcastle Drive Management Company Limited | Households | 1985 |
| Numbereight Properties Ltd | Construction | 2018 |
| Nuneaton V.E. Limited | Other services | 1998 |
| Nunez Property Holdings Limited | Real estate | 2025 |
| Nunn Care Group Limited | Health & social care | 2023 |
| Nunn Corporation Limited | Financial services | 2023 |
| Nunn Properties Limited | Real estate | 2021 |
| Nunn Property Developments Limited | Construction | 2020 |
| Nuogou Limited | Transport & logistics | 2020 |
| Nuptia Limited | Other services | 2012 |
| NUR Adegbite & Sons Limited | Health & social care | 2014 |
| Nurah-Sophia Limited | Manufacturing | 2025 |
| Nure Ltd | Wholesale & retail | 2025 |
| Nurse LED Aesthetics & Skin Clinic Ltd | Health & social care | 2024 |
| Nurture Naturopathic Nutrition Limited | Health & social care | 2021 |
| Nurture Paws Ltd | Health & social care | 2025 |
| Nurturecare Limited | Health & social care | 2013 |
| Nurturecare Respite Homes Limited | Financial services | 2016 |
| Nurturing Spaces CIC | Hospitality | 2024 |
| Nuscents Ltd | Manufacturing | 2021 |
| Nutbrook Developments Limited | Real estate | 1997 |
| Nutbrown Projects Limited | Other services | 2002 |
| Nutbrown Software Limited | Information & communication | 2024 |
| Nutec Catering Equipment Limited | Construction | 2024 |
| Nuthall 432 Limited | Hospitality | 2026 |
| Nuthall Electrical Services Limited | Construction | 2004 |
| Nuthall Investments Limited | Real estate | 2021 |
| Nuthall Plant Hire Limited | Administrative & support | 2004 |
| Nuthall Self Storage Ltd | Transport & logistics | 2012 |
| Nutoro Ltd | Information & communication | 2025 |
| NUTRI2GO Ltd | Manufacturing | 2015 |
| Nutricircle Limited | Wholesale & retail | 2017 |
| Nutrifact UK Ltd | Wholesale & retail | 2022 |