| Nishant Apps Limited | Information & communication | 2025 |
| Nishraj Limited | Information & communication | 2007 |
| Nishtha Programs Limited | Information & communication | 2025 |
| Nisi Investments Limited | Real estate | 2014 |
| Niso Group Ltd | Construction | 2022 |
| Niva Interiors Ltd | Professional & scientific | 2008 |
| Nivaan Online Limited | Wholesale & retail | 2023 |
| Nivae 137AB Limited | Real estate | 2026 |
| Nivae 162 Limited | Real estate | 2026 |
| Nivae Corp Limited | Real estate | 2021 |
| Nivae Eastgate Limited | Real estate | 2020 |
| Nivae EGT2 Limited | Real estate | 2022 |
| Nivae Limited | Real estate | 2018 |
| Nivae Management Ltd | Real estate | 2021 |
| Nivae Residential Limited | Real estate | 2020 |
| Nivae Rochester Limited | Real estate | 2020 |
| Nivae Waterside Limited | Real estate | 2020 |
| Niyam Maintenance Ltd | Construction | 2025 |
| Nizami Estates Limited | Real estate | 2019 |
| NJ Bhudia Ltd | Real estate | 2021 |
| NJ Blendz Ltd | Other services | 2024 |
| NJ Building Contractors Ltd | Construction | 2016 |
| NK Computer Services Limited | Information & communication | 1994 |
| NK22 Ltd | Construction | 2025 |
| NKB Tradex International Ltd | Wholesale & retail | 2025 |
| NKM Investments Ltd | Real estate | 2021 |
| NKM Minibuses Ltd | Transport & logistics | 2025 |
| Nknp Ltd | Construction | 2025 |
| NKS Express Limited | Wholesale & retail | 2017 |
| NKS Investment Properties Ltd | Real estate | 2025 |
| NL Investments Ltd | Financial services | 2026 |
| NLW Law Limited | Professional & scientific | 2016 |
| NMC Travel Limited | Information & communication | 2008 |
| Nmehta Limited | Health & social care | 2025 |
| NN Fashions London Limited | Wholesale & retail | 2025 |
| NN Private Limited | Health & social care | 2021 |
| NO Limit Plumbing Ltd | Construction | 2011 |
| Noahdent Holdings Limited | Financial services | 2012 |
| Noahdent Investments Ltd | Financial services | 2023 |
| Noble Forms Limited | Administrative & support | 2021 |
| Noble Restro Ltd | Hospitality | 2026 |
| Nobleprog Limited | Information & communication | 2007 |
| Nodes London Ltd | Wholesale & retail | 2023 |
| Nomad Team Ltd | Information & communication | 2013 |
| Nomadic Europe DMC Ltd | Administrative & support | 2025 |
| Nong Geng JI UK Ltd | Hospitality | 2024 |
| Noor 2011 Ltd | Hospitality | 2025 |
| Noor Blue Sky Limited | Real estate | 2022 |
| Noor Investments Group Limited | Real estate | 2022 |
| Noor the Label Hijabs Ltd | Wholesale & retail | 2025 |
| Noor U.K Investment Ltd | Real estate | 2024 |
| Noorasis Ltd | Wholesale & retail | 2024 |
| Noori Auto Ltd | Wholesale & retail | 2025 |
| Noraliz Holding Ltd | Financial services | 2026 |
| Norch Trading Co., Ltd | Wholesale & retail | 2022 |
| Noricum Limited | Extraterritorial | 2016 |
| Norman Fashions Ltd | Wholesale & retail | 2010 |
| Norman Aston Consultancy Limited | Professional & scientific | 2024 |
| Norman Clarke Associates Limited | Professional & scientific | 2006 |
| North 65 LLP | | 2015 |
| North Acton Developments Limited | Construction | 2025 |
| North Circular Apartments Ltd | Real estate | 2025 |
| North Circular View Ltd | Real estate | 2014 |
| North LDN Townhouse Ltd | Hospitality | 2019 |
| North London Urology Services Limited | Health & social care | 2017 |
| North Mews Publishing Ltd | Information & communication | 2014 |
| Northerns Retail Limited | Wholesale & retail | 2019 |
| Northiam Associates Limited | Administrative & support | 2016 |
| Northiampton for Pipes Industry Ltd | Manufacturing | 2020 |
| Northquay Property Services Ltd | Real estate | 2026 |
| Northstar Edge Ltd | Wholesale & retail | 2025 |
| Northwood Realty Ltd | Real estate | 2023 |
| Northwood Auto Services Limited | Wholesale & retail | 2023 |
| Norvis Monarchy Ltd | Information & communication | 2018 |
| Norwest Limited | Extraterritorial | 2000 |
| NOT for the Radio Limited | Information & communication | 2024 |
| Nova Care (G.B.) Limited | | 1994 |
| Nova Hair & Beauty Limited | Other services | 2022 |
| Nova Hill Limited | Hospitality | 2025 |
| Nova Legal Consultancy Ltd | Professional & scientific | 2025 |
| Nova Terra Ltd | Real estate | 2022 |
| Novacept Limited | Information & communication | 2019 |
| Novah Enterprises Limited | Health & social care | 2008 |
| Novalisq Limited | Wholesale & retail | 2026 |
| Novanta Consulting Ltd | Education | 2026 |
| Novaplex Limited | Information & communication | 2026 |
| Novatium Limited | Professional & scientific | 2023 |
| Novel Cars Limited | Wholesale & retail | 2023 |
| Novin Pharma Group Limited | Health & social care | 2025 |
| Novique Fashion Ltd | Wholesale & retail | 2026 |
| Novis Construct Ltd | Construction | 2019 |
| Novotex Ltd | Other services | 2025 |
| Novus Atman Real Estate Ltd | Real estate | 2020 |
| Novus Legal Services Limited | Financial services | 2019 |
| Nozha Limited | Wholesale & retail | 2018 |
| NP Galoria Ltd | Transport & logistics | 2016 |
| NP Global Ltd | Wholesale & retail | 2025 |
| NP98 Limited | Hospitality | 2025 |
| Npab Consultancy Limited | Information & communication | 2022 |
| Npcar Limited | Health & social care | 2025 |