| Nethans Limited | Professional & scientific | 2006 |
| Netraaste Ltd | Information & communication | 2022 |
| Netravision Ltd | Health & social care | 2025 |
| Netrexs Technologies Ltd | Information & communication | 2025 |
| Network Affordable Developments Ltd | Real estate | 2014 |
| Network Energy Limited | Construction | 2013 |
| Network Homes Investments Limited | Real estate | 2007 |
| Network New Build Limited | Real estate | 2000 |
| Network Treasury Services Limited | Financial services | 2007 |
| Neubuilds Limited | Construction | 2023 |
| Neurobloom Ltd | Health & social care | 2026 |
| Neurorewire Ltd | Education | 2026 |
| Neurovision Nottingham Limited | Health & social care | 2024 |
| Nevida Healthcare Limited | Health & social care | 2014 |
| New AGE Capital Limited | Information & communication | 2019 |
| New AGE Linen Ltd | Manufacturing | 2023 |
| New Aroma Catering Limited | Hospitality | 2025 |
| New Challenge CIC | Administrative & support | 1997 |
| New Epoch RJK Limited | Real estate | 2024 |
| New Galaxy Traders Private Ltd | Transport & logistics | 2023 |
| New I.D Living Limited | Administrative & support | 2022 |
| New Lahori Kebab Limited | Hospitality | 2020 |
| New Lahori Masala Ltd | Hospitality | 2017 |
| New Life 2000 Limited | Wholesale & retail | 2025 |
| New MAN Barber Shop Limited | Other services | 2019 |
| New Momo House Ltd | Hospitality | 2017 |
| New Order Sports Ltd | Wholesale & retail | 2018 |
| New Pavilion Packaging Limited | Hospitality | 2025 |
| New Peace Momo Ltd | Hospitality | 2025 |
| New Spaces London Ltd | Wholesale & retail | 2024 |
| New Star Start Ltd | Arts & recreation | 2025 |
| New Tasty Pizza Ltd | Hospitality | 2021 |
| New Tech Life Care Limited | Administrative & support | 2009 |
| New Wembley Ltd | Other services | 2020 |
| Newbury Recruitment Limited | Administrative & support | 2021 |
| Newcastlemax Holdco Limited | Financial services | 2026 |
| Newfarm for Agricultural Investment & Development Ltd | Agriculture & fishing | 2020 |
| Newgen Records Limited | Information & communication | 2026 |
| Newsmart (London) Ltd | Wholesale & retail | 2018 |
| Newtouch Sales Ltd | Wholesale & retail | 2020 |
| Newworldtrade Ltd | Wholesale & retail | 2025 |
| Nexa Core IT Ltd | Information & communication | 2026 |
| Nexa Print Ltd | Manufacturing | 2025 |
| Nexacommerce IT Limited | Information & communication | 2025 |
| Nexastrive Limited | Information & communication | 2023 |
| Nexaswift Ltd | Wholesale & retail | 2024 |
| Nexgen E-Commerce Limited | Wholesale & retail | 2024 |
| Nexgen Pro Ltd | Information & communication | 2023 |
| Nexon Electric Ltd | Construction | 2025 |
| Next Key Autos Ltd | Wholesale & retail | 2025 |
| Next Level Consulting Ltd | Wholesale & retail | 2025 |
| Nextcode PVT Ltd | Information & communication | 2024 |
| Nextfit Retail Limited | Professional & scientific | 2024 |
| Nextgen ERP Solutions Limited | Information & communication | 2014 |
| Nextgen Prestige Developments Ltd | Construction | 2026 |
| Nextgen Property Holdings Limited | Financial services | 2024 |
| Nextgen Property Innovations Limited | Real estate | 2024 |
| Nextgen Stays Limited | Real estate | 2024 |
| Nextvolt Limited | Construction | 2026 |
| Nexus Business Associates Ltd | Wholesale & retail | 2014 |
| Nexus Career Solutions Limited | Administrative & support | 2025 |
| Nexus Legacy Ltd | Hospitality | 2022 |
| Nexus London Investments Limited | Administrative & support | 2022 |
| Nexus Optimised Services Limited | Information & communication | 2004 |
| Nexus Security Global Ltd | Administrative & support | 2022 |
| NFE Events Limited | Administrative & support | 2015 |
| Nforce Security Ltd | Administrative & support | 2020 |
| Ngala Resources Limited | Professional & scientific | 2012 |
| NGB Contractors Ltd | Construction | 2019 |
| NGC Freehold Limited | Real estate | 2015 |
| NGM (Middx) Ltd | Wholesale & retail | 2018 |
| NH Taverns Ltd | Hospitality | 2008 |
| Nhmd Properties LLP | | 2016 |
| NI Xiao LI Ltd | Financial services | 2026 |
| Nia's Enterprise Limited | Wholesale & retail | 2025 |
| NIC Electrical Ltd | Construction | 2021 |
| Nice Photography Ltd | Professional & scientific | 2025 |
| Nicefood Online Ltd | Hospitality | 2019 |
| Nicholasstouteplumbing Limited | Construction | 2014 |
| Nicks Transport Ltd | Transport & logistics | 2025 |
| Nicolas Construction Limited | Construction | 2025 |
| Nicoleta's Services Ltd | Administrative & support | 2022 |
| NIDRA-N3 Limited | Professional & scientific | 2023 |
| Night Rider Records Limited | Information & communication | 2026 |
| Nightboss Ltd | Wholesale & retail | 2024 |
| Nikshit Limited | Wholesale & retail | 2025 |
| Nilah M. Ventures Ltd | Other services | 2019 |
| Nilkanth Sports Limited | Arts & recreation | 2016 |
| Nilkanth Trading Ltd | Wholesale & retail | 2025 |
| Niloni Global UK Ltd | Wholesale & retail | 2025 |
| Nils Consultancy Limited | Wholesale & retail | 2009 |
| Nimble Property Services Ltd | Administrative & support | 2019 |
| Nimbus Digital Ltd | Information & communication | 2012 |
| Nine Stories Ltd | Information & communication | 2015 |
| Nineteen Keys Ltd | Real estate | 2025 |
| Nirav Lakhman Consultancy Ltd | Professional & scientific | 2024 |
| NIRMAL25 Limited | Wholesale & retail | 2025 |
| Niru Services Limited | Wholesale & retail | 2018 |
| Nisa London Limited | Wholesale & retail | 2022 |
| Nisay Properties Trading Ltd | Real estate | 2016 |