| Niranjan Studios Limited | Arts & recreation | 2025 |
| Niru (Europe) Limited | Administrative & support | 1997 |
| Niru Frozen Foods Limited | Wholesale & retail | 2005 |
| Niru Global Limited | Administrative & support | 2006 |
| Niru Properties Ltd | Real estate | 2003 |
| Nirunive Ltd | Hospitality | 2024 |
| Nirvana Packaging Ltd | Wholesale & retail | 2020 |
| Nisar Food & Wine Ltd | Wholesale & retail | 2013 |
| Nisha's Kitchen Limited | Manufacturing | 2024 |
| Nishan Builders Limited | Administrative & support | 2017 |
| Nisma Investments Limited | Real estate | 2024 |
| Nisonic Limited | Other services | 2025 |
| NIU Life Limited | Construction | 2025 |
| Nivas Interiors Limited | Construction | 2025 |
| Nivas Property Group Limited | Real estate | 2025 |
| Nizam Constructions & Assets Management Ltd | Construction | 2026 |
| NJA Foods Limited | Hospitality | 2023 |
| NKV Properties Ltd | Real estate | 2026 |
| NL Electricals Limited | Construction | 2017 |
| NMR Investments Ltd | Real estate | 2020 |
| NNP Management Limited | Professional & scientific | 2024 |
| NO Limit Tuning Ltd | Manufacturing | 2018 |
| Noahs ARK Group Ltd | Real estate | 2024 |
| Noble Infinity Limited | Other services | 2019 |
| NOC Solutions Ltd | Wholesale & retail | 2025 |
| Nonna Tonda Limited | Hospitality | 2018 |
| Noora J Trading Ltd | Hospitality | 2025 |
| Norie Electrical Ltd | Construction | 2026 |
| Norseman(Cables & Extrusions)Limited | Extraterritorial | 1954 |
| North Rays Technologies Ltd | Information & communication | 2026 |
| Northsterling Accountancy Ltd | Professional & scientific | 2026 |
| Nova Abode Properties Ltd | Wholesale & retail | 2025 |
| Nova Beauty Aesthetics Limited | Other services | 2024 |
| Novare Aesthetics Ltd | Health & social care | 2025 |
| Novastart Living Limited | Hospitality | 2025 |
| Novel Blend Ltd | Wholesale & retail | 2025 |
| Novoplex Limited | Extraterritorial | 1965 |
| Novu Labs Ltd | Information & communication | 2026 |
| Npcare Limited | Health & social care | 2019 |
| NR Technology Limited | Manufacturing | 2023 |
| NRC UK Enterprise Ltd | Wholesale & retail | 2019 |
| NRK Construction Ltd | Construction | 2024 |
| NS Hair and Beauty Cosmetics Ltd | Wholesale & retail | 2025 |
| NS Liaff Limited | Other services | 2022 |
| Nsawam Market Ltd | Extraterritorial | 2020 |
| Nsawam Trading Ltd | Wholesale & retail | 2020 |
| NSK Services Limited | Transport & logistics | 2025 |
| Nspoundplus Ltd | Wholesale & retail | 2025 |
| Nspyr Training Ltd | Information & communication | 2026 |
| Ntcc Consulting Limited | Professional & scientific | 2017 |
| Ntsl Limited | Administrative & support | 2015 |
| NU Healthcare Ltd | Health & social care | 2025 |
| Nubuilding Services Ltd | Construction | 2024 |
| Nucleusxp Limited | Information & communication | 2024 |
| Numr Ltd | Real estate | 2025 |
| Nuprem Ltd | Wholesale & retail | 2020 |
| Nurture First Ltd | Health & social care | 2023 |
| NWF Investments Ltd | Wholesale & retail | 2025 |
| Nxdimension Ltd | Construction | 2016 |
| NYA Corp Ltd | Information & communication | 2024 |
| Nyansa Ltd | Professional & scientific | 2024 |
| O&C General Construction Ltd | Construction | 2023 |
| Oak & Summit Ltd | Households | 2025 |
| Oakdale Consultancy & Management Ltd | Professional & scientific | 2016 |
| Oaks Construction Ltd | Construction | 2025 |
| OBI Maths Tuition Ltd | Education | 2022 |
| Obiankes Businesses Limited | Information & communication | 2019 |
| Obimfelix Ltd | Health & social care | 2023 |
| Obsessed by Print Limited | Arts & recreation | 2024 |
| OC Prime Ltd | Wholesale & retail | 2024 |
| Ocean Hire Management Ltd. | Administrative & support | 2015 |
| Oceans Delight Limited | Wholesale & retail | 2025 |
| Octaglobe Technologies Ltd. | Extraterritorial | 2009 |
| Octopus Plumbing Ltd | Construction | 2015 |
| Odzonic Technologies and Solutions Private Limited | Wholesale & retail | 2021 |
| Ofsty Ltd | Wholesale & retail | 2024 |
| Ohmatic Electrical Ltd | Construction | 2021 |
| OL Jewellery Ltd | Wholesale & retail | 2026 |
| Olavender Care Limited | Health & social care | 2020 |
| Old Skool Service Ltd | Wholesale & retail | 2019 |
| Olihill Limited | Administrative & support | 2023 |
| Olimpia One Ninety Ltd | Administrative & support | 2019 |
| Olive Tree Montessori Ltd | Health & social care | 2011 |
| Oliveira & Rosa Constructions Limited | Construction | 2015 |
| Oliveira Stones Ltd | Construction | 2018 |
| Olympus Exterior Services Ltd | Administrative & support | 2025 |
| OM Transport Ltd | Administrative & support | 2018 |
| Oman Ghana Baako Ltd. | Other services | 2018 |
| Omar Pharma Limited | Health & social care | 2025 |
| Omnease Ltd | Extraterritorial | 2024 |
| Omni Web Solutions Limited | Wholesale & retail | 2026 |
| Omnimart Ltd | Wholesale & retail | 2025 |
| OMS Media Ltd | Information & communication | 2024 |
| OMS Media Shops Ltd | Wholesale & retail | 2025 |
| OMV Constructions Ltd | Construction | 2015 |
| ON Demand Logistics Limited | Transport & logistics | 2024 |
| Ondecore Ltd | Construction | 2025 |
| Ondime Ltd | Real estate | 2022 |
| One 2 Light Limited | Construction | 2019 |
| One Life Capital Limited | Real estate | 2023 |