| Norvia Care Services CIC | Health & social care | 2026 |
| Norvia Care Solutions Ltd | Health & social care | 2026 |
| Norvix Ltd | Wholesale & retail | 2026 |
| Nose Academy CIC | Education | 2020 |
| Nose Doctor Ltd | Health & social care | 2014 |
| Notary Public Limited | Professional & scientific | 2011 |
| Nova Educational Technology Ltd | Information & communication | 2025 |
| Nova Goods Direct Ltd | Wholesale & retail | 2025 |
| Nova Property & Developments Ltd | Real estate | 2024 |
| Nova-Gene Holdings Ltd | Professional & scientific | 2025 |
| Novaella Ltd | Transport & logistics | 2025 |
| Novalign Consultancy Limited | Administrative & support | 2014 |
| Novalign Limited | Administrative & support | 2006 |
| Novalyne Ltd | Wholesale & retail | 2025 |
| Novara House Limited | Real estate | 2025 |
| Novatec Engineering Solutions Ltd | Professional & scientific | 2025 |
| Novera Care Ltd | Health & social care | 2025 |
| Novi Recruitment Ltd | Administrative & support | 2023 |
| NOW Business Solutions Ltd | Administrative & support | 2021 |
| NP Bodyworks Ltd | Wholesale & retail | 2020 |
| NP Staycations Ltd | Hospitality | 2023 |
| Npcbldg Ltd | Construction | 2026 |
| Npcln Ltd | Wholesale & retail | 2025 |
| Npkc Ltd | Transport & logistics | 2023 |
| NPS Contractors Ltd | Construction | 2009 |
| NR Care Group Limited | Real estate | 2023 |
| NR Trades Ltd | Households | 2025 |
| NRA Consultancy Limited | Other services | 2018 |
| NRS UK Logistics Ltd | Transport & logistics | 2026 |
| NRT Consultancy Limited | Professional & scientific | 2025 |
| NS & Sons Motors Ltd | Wholesale & retail | 2022 |
| NS Social Work Training and Consultancy Ltd | Health & social care | 2022 |
| NS Transport Ltd | Transport & logistics | 2025 |
| NSA Mortgages Ltd | Financial services | 2026 |
| NSA Property Management Limited | Real estate | 2005 |
| NSB Healthcare Limited | Wholesale & retail | 2022 |
| NSC Data Ltd | Construction | 2021 |
| Nsclen Ltd | Administrative & support | 2026 |
| NSD Property Management Ltd | Real estate | 2024 |
| NSM School of Motoring Limited | Education | 2025 |
| Nsma and Co Limited | Wholesale & retail | 2026 |
| NSS and Family Limited | Real estate | 2024 |
| Nssc Holdings Ltd | Financial services | 2024 |
| Nssgproperties Ltd | Extraterritorial | 2024 |
| NSZ Ltd | Real estate | 2025 |
| NSZ Operations Ltd | Hospitality | 2023 |
| NT Care Group Limited | Health & social care | 2022 |
| NT Care Property Ltd | Real estate | 2023 |
| NT Leisure Leagues Ltd | Arts & recreation | 2023 |
| NT Roofing Solutions Ltd | Construction | 2025 |
| Ntank Limited | Real estate | 2025 |
| NU Food & Beverage Ltd | Hospitality | 2022 |
| Nu-Gen Ultrasound Ltd | Administrative & support | 2016 |
| Nugen Skin Clinic Ltd | Other services | 2026 |
| Nugroup Midlands Ltd | Other services | 2025 |
| NUH Mashuk Ltd | Construction | 2025 |
| Nujra Ltd | Wholesale & retail | 2024 |
| Nulinen Ltd | Wholesale & retail | 2025 |
| Number One (SD) Holdings Limited | Financial services | 2022 |
| Number Three (BF) Holdings Limited | Health & social care | 2025 |
| Number Two (CT) Holdings Limited | Financial services | 2022 |
| Nuong House Ltd | Hospitality | 2025 |
| Nurture Care Consultancy Ltd | Professional & scientific | 2022 |
| Nurture Success Ltd | Education | 2016 |
| Nurv Marketing Limited | Professional & scientific | 2019 |
| NUS 2021 Ltd | Construction | 2021 |
| Nutrijoi Limited | Manufacturing | 2025 |
| Nutrilab Limited | Wholesale & retail | 2025 |
| Nutritaroz Limited | Wholesale & retail | 2022 |
| Nutrition King Ltd | Wholesale & retail | 2025 |
| Nutrixium Ltd | Wholesale & retail | 2025 |
| Nuurul Huda Cultural Centre Ltd | Other services | 2020 |
| Nuvano Ltd | Wholesale & retail | 2025 |
| Nuwash Laundry Ltd | Other services | 2024 |
| Nuwash Ltd | Water & waste | 2021 |
| Nuyu Laser Clinics Ltd | Other services | 2020 |
| NV Group Solutions Limited | Transport & logistics | 2024 |
| NV Maintenance Limited | Other services | 2021 |
| NVA Hospitality Limited | Hospitality | 2021 |
| NWR Midlands Ltd | Professional & scientific | 2024 |
| NX Group Holdings Limited | Real estate | 2023 |
| NX Group SPV1 Limited | Real estate | 2023 |
| NXT Globe Ltd | Transport & logistics | 2021 |
| Nxtg Transport Ltd | Transport & logistics | 2021 |
| NY Consulting Limited | Professional & scientific | 2026 |
| NY Guys Limited | Hospitality | 2025 |
| NYA Auto Sales Ltd | Wholesale & retail | 2024 |
| NYA Pharma Enterprises Ltd | Wholesale & retail | 2022 |
| Nyxconstruction Ltd | Construction | 2025 |
| NZ Travels Ltd | Transport & logistics | 2026 |
| NZG Ventures Ltd | Professional & scientific | 2026 |
| O & E Pubs Limited | Hospitality | 2025 |
| O L B Cleaning Limited | Administrative & support | 2025 |
| O Vesu Pizza Ltd | Hospitality | 2023 |
| O&Epopoviciconstruction Ltd. | Construction | 2024 |
| O'Connor Pharmacies Limited | Wholesale & retail | 1991 |
| O.V.O Architecture Ltd | Professional & scientific | 2019 |
| O3 Systems Services Limited | Wholesale & retail | 2022 |
| Oacleaning Services Limited | Administrative & support | 2020 |
| Oak Ecology Ltd | Professional & scientific | 2021 |