| New Gill Barber Shop Ltd | Other services | 2025 |
| New Heating & Plumbing Limited | Construction | 2008 |
| New Odyssey Group Limited | Information & communication | 2022 |
| New Odyssey Ltd | Information & communication | 2016 |
| Newlands Electrical Services Limited | Construction | 2006 |
| Newton Ductwork Services Ltd | Construction | 2007 |
| Nextgen Contractors Ltd | Construction | 2023 |
| Nextstepimpact CIC | Wholesale & retail | 2025 |
| Nexus 8 Ltd | Administrative & support | 2024 |
| NG Shine Cleaning Services Ltd | Administrative & support | 2025 |
| Nicholson Family Holdings Ltd | Financial services | 2025 |
| Nickalson Limited | Construction | 2017 |
| Nicolas Scrap Ltd | Wholesale & retail | 2022 |
| Nicutza Ltd | Construction | 2016 |
| Nigerians in Diaspora Organisation Europe (Nidoe) | Other services | 2002 |
| Nijc Leisure Limited | Arts & recreation | 2025 |
| Nijo Construction Ltd | Construction | 2014 |
| Nijo Property Ltd | Real estate | 2019 |
| Nikie Consulting Limited | Administrative & support | 2018 |
| NIM Company 2024 Ltd | Manufacturing | 2024 |
| Nine Nights Ltd | Real estate | 2024 |
| Nittya Food&Wine Limited | Wholesale & retail | 2014 |
| Njosh and Associates Limited | Health & social care | 2023 |
| Nkalech Ventures Ltd | Real estate | 2022 |
| Nkelle Services Ltd | Other services | 2023 |
| Nkem&Co Ltd | Wholesale & retail | 2019 |
| NKL Excellence Ltd | Professional & scientific | 2024 |
| NKR Forklifts Ltd | Wholesale & retail | 2022 |
| Nkr-Company Ltd | Financial services | 2022 |
| Nnaruku UK Ltd | Hospitality | 2020 |
| NO.1 Global Ltd | Wholesale & retail | 2019 |
| Noble Hands Care Ltd. | Administrative & support | 2024 |
| Noblecrown Services Ltd | Health & social care | 2020 |
| NOD 51BEL Ltd | Transport & logistics | 2026 |
| Nollywood Plus TV Ltd. | Information & communication | 2020 |
| Nomentu Ltd. | Administrative & support | 2017 |
| Nord Build & Design Limited | Construction | 2011 |
| Norman Road Stores Ltd | Hospitality | 2017 |
| Norsha Properties Ltd | Health & social care | 2025 |
| North Star Rail Ltd | Professional & scientific | 2023 |
| Norzada Group Ltd | Financial services | 2025 |
| Nothing Long Limited | Hospitality | 2015 |
| NR Properties and Lettings Ltd | Real estate | 2022 |
| Nskin London Ltd | Manufacturing | 2020 |
| NTA Consulting Limited | Information & communication | 2025 |
| Nuelyf Ltd | Extraterritorial | 2023 |
| Nugol Limited | Construction | 2022 |
| Numavi Chauffeur Ltd | Transport & logistics | 2026 |
| Nuradol International Limited | Administrative & support | 2018 |
| Nutri Sauce Ltd | Manufacturing | 2014 |
| Nvmeless Ltd | Information & communication | 2025 |
| NW Planning & Operations Ltd | Public administration | 2025 |
| NX Supplies Limited | Wholesale & retail | 2021 |
| NXT Frame Media Ltd | Information & communication | 2025 |
| Nyansapo Legacy Ltd | Real estate | 2024 |
| O J Dafitohwo & Sons Limited | Professional & scientific | 2014 |
| O N Florea Accountancy Ltd | Professional & scientific | 2021 |
| O.F.Gay Limited | Health & social care | 2023 |
| O4G Media Ltd | Information & communication | 2021 |
| Oak Ridge Fencing Ltd | Administrative & support | 2010 |
| Oak&Ivory Ltd | Wholesale & retail | 2025 |
| Oaks Truck & Plant Limited | Wholesale & retail | 2017 |
| Oasisr Technology Limited | Information & communication | 2023 |
| Obanimpa Ltd. | Construction | 2016 |
| Occupational Therapy and Sensory Integration Centre(Otsic) Ltd | Health & social care | 2026 |
| Ocean Fish & Grill Ltd | Hospitality | 2019 |
| Ockiaa Properties Limited | Real estate | 2025 |
| Octasec Limited | Wholesale & retail | 2021 |
| Odesa Street Shawarma Ltd | Hospitality | 2026 |
| OEO Ltd | Real estate | 2025 |
| Offbeat Looks Hair & Beauty Ltd | Other services | 2025 |
| Ofnik Ltd | Wholesale & retail | 2023 |
| OGB Limited | Information & communication | 2015 |
| Ogeleka Power Media Ltd | Information & communication | 2023 |
| OGK Ventures Limited | Construction | 2017 |
| OJ Equity Ltd | Construction | 2024 |
| Ojay Consultant Limited | Professional & scientific | 2014 |
| Ojimomo Consult Limited | Construction | 2018 |
| Okuyemi & Ogundehin Ltd | Health & social care | 2018 |
| Okzydolly Limited | Wholesale & retail | 2023 |
| Olagrace Day, Nursery, and Preschool Limited | Education | 2024 |
| Olajide Medical and Safety Services Limited | Health & social care | 2019 |
| Olajomi Limited | Hospitality | 2024 |
| Olakunle Sanjo Limited | Health & social care | 2018 |
| Olaris Group Limited | Construction | 2025 |
| Olatoks Trading Limited | Health & social care | 2024 |
| Olayemi's Healthcare Ltd | Public administration | 2021 |
| Oleb Properties Ltd | Real estate | 2025 |
| Olipax Ltd | Wholesale & retail | 2025 |
| Olive Integrated Systems Limited | Information & communication | 2012 |
| Olly 4 U Limited | Other services | 2009 |
| Olly Taylor Productions Ltd | Arts & recreation | 2017 |
| Ollycare Services Limited | Public administration | 2025 |
| Olori Care Ltd | Health & social care | 2025 |
| Olosi Limited | Public administration | 2024 |
| Olsaam Limited | Manufacturing | 2010 |
| Olu-Juwan Medicare Services Limited | Health & social care | 2018 |
| Olusimple Asset Management Limited | Real estate | 2024 |
| Oluwanifemimofe Limited | Health & social care | 2017 |
| Oluwilson Limited | Manufacturing | 2015 |