| Nook & Nordic Limited | Wholesale & retail | 2026 |
| Noon Cafee Limited | Hospitality | 2024 |
| Noor and Gill Ltd | Construction | 2023 |
| Noor UK Logistic Ltd | Administrative & support | 2023 |
| Nooremedy Ltd | Manufacturing | 2024 |
| Noorjahan Ltd | Wholesale & retail | 2010 |
| Nora (Egham) Ltd | Hospitality | 2018 |
| Nora 92 Limited | Arts & recreation | 1992 |
| Nora Entries Limited | Administrative & support | 2022 |
| Nordaq Fresh Limited | Wholesale & retail | 2013 |
| Nordex Supplies Limited | Wholesale & retail | 2023 |
| Nordivo Ltd | Wholesale & retail | 2026 |
| Norfolk Properties (London) Ltd | Real estate | 2016 |
| Noriiconsultancy Limited | Health & social care | 2022 |
| Norley IT Services Ltd | Professional & scientific | 2024 |
| Norse Data and Security Ltd | Construction | 2023 |
| Norsk European Limited | Extraterritorial | 2004 |
| Norsk European Wholesale Limited | Transport & logistics | 1993 |
| Norsk Global Limited | Financial services | 2021 |
| North Earls Property Limited | Real estate | 2020 |
| North London Cardiology Centre Limited | Health & social care | 2026 |
| North London Urology Centre Limited | Health & social care | 2026 |
| North Park Rock Ltd | Financial services | 2025 |
| Northcorp Solutions Ltd | Information & communication | 2021 |
| Northern Bloc Limited | Wholesale & retail | 2024 |
| Northern Cape Services Ltd | Administrative & support | 2010 |
| Northern Pro Properties Ltd | Real estate | 2025 |
| Northfields Restaurants Ltd | Hospitality | 2025 |
| Northfields Services Ltd | Administrative & support | 2024 |
| Northumberland Consulting Ltd | Professional & scientific | 2019 |
| Northvale Digital Ltd | Wholesale & retail | 2025 |
| Northwood Grove Ltd | Information & communication | 2023 |
| Nostal Limited | Information & communication | 2023 |
| NOT SO Indian Ltd | Hospitality | 2019 |
| NOT the Norm Limited | Manufacturing | 2003 |
| NOT1BRAND Limited | Wholesale & retail | 2023 |
| Nourish Professional Consultants UK Ltd | Professional & scientific | 2012 |
| Nourium AI Ltd | Information & communication | 2026 |
| Nova Heights PVT Ltd | Wholesale & retail | 2026 |
| Nova Kitchen Studio Ltd | Wholesale & retail | 2020 |
| Nova Nexus Ltd | Transport & logistics | 2025 |
| Novacura Healthcare Ltd | Health & social care | 2025 |
| Novakey Properties Ltd | Real estate | 2024 |
| Novalogy Property Ltd | Real estate | 2026 |
| Novanta Designs Ltd | Construction | 2007 |
| Novarix Limited | Wholesale & retail | 2025 |
| Novastar Ltd | Wholesale & retail | 2023 |
| Novel Group Limited | Real estate | 2023 |
| Novel Hub Limited | Real estate | 2022 |
| November Ajax Ltd | Wholesale & retail | 2026 |
| Noventrax Digital Ltd | Wholesale & retail | 2025 |
| Novolani Takeout Ltd | Hospitality | 2025 |
| Novorum Ltd | Wholesale & retail | 2024 |
| Novus RDC Limited | Construction | 2019 |
| Novus Ventures Ltd | Real estate | 2020 |
| Nowa Traders Ltd | Wholesale & retail | 2026 |
| Nowakowski Funeral Directors Limited | Other services | 2014 |
| Noyelles Limited | Professional & scientific | 2017 |
| Npaa Estates Ltd | Real estate | 2024 |
| NPS Scaffolding Ltd | Construction | 2025 |
| NPT Limited | Extraterritorial | 2009 |
| NR & G Consultants Limited | Professional & scientific | 2013 |
| NR Global Limited | Households | 2025 |
| NR1PLACE Ltd | Wholesale & retail | 2018 |
| Nrdara Property Ltd | Real estate | 2019 |
| NRI Legal Consultants Ltd | Administrative & support | 2024 |
| Nrns Solutions Ltd | Construction | 2025 |
| NRT Solution Ltd | Wholesale & retail | 2025 |
| NRW Limited | Administrative & support | 2026 |
| NS and Sons Trading Ltd | Wholesale & retail | 2025 |
| NS Group Construction Ltd | Construction | 2025 |
| NS Infra Estate Slough Ltd | Construction | 2023 |
| NS Planning Services Limited | Professional & scientific | 2017 |
| NS Property Investments Limited | Real estate | 2017 |
| NS Smart Solutions Ltd | Information & communication | 2020 |
| NSC IT Services Ltd | Information & communication | 2021 |
| NSC Optical Ltd | Administrative & support | 2015 |
| NSD Catering Ltd | Hospitality | 2026 |
| NSK Commercial Limited | Real estate | 2026 |
| NSK Construction Ltd | Construction | 2014 |
| NSK Consulting & Management Services Ltd | Information & communication | 2020 |
| NSK Real Estates Limited | Real estate | 2018 |
| NSM Construction Ltd | Construction | 2018 |
| Nsmk Limited | Real estate | 2020 |
| NSN Carpentry Limited | Construction | 2021 |
| NSN Technologies Ltd | Information & communication | 2012 |
| NSR Limited | Administrative & support | 2001 |
| Nssvl Services 2022 Limited | Professional & scientific | 2022 |
| Nstach Ltd | Information & communication | 2023 |
| NT Brothers & Co Ltd | Real estate | 2024 |
| NTA Transport Ltd | Transport & logistics | 2022 |
| NTJ Care Services Limited | Health & social care | 2020 |
| Ntomov Ltd | Administrative & support | 2018 |
| NTS Builders Ltd | Construction | 2021 |
| NU Eco Sustainable Solutions Ltd | Manufacturing | 2017 |
| NU Express Logistics Ltd | Wholesale & retail | 2025 |
| NU Focus Education Community Interest Company | Wholesale & retail | 2010 |
| Nu-Coat Ltd | Manufacturing | 2018 |
| NUA Beauty Ltd | Other services | 2025 |
| Nuage Digital Limited | Information & communication | 2014 |