| Nafs Properties Limited | Households | 2025 |
| Naik Enterprise Limited | Real estate | 2018 |
| Nair Business Consultancy Ltd | Information & communication | 2026 |
| Narc Consulting Limited | Professional & scientific | 2016 |
| Narin Catering Limited | Hospitality | 2022 |
| Nateta Ltd | Information & communication | 2019 |
| Natkb Limited | Construction | 2013 |
| Natsoft Corporation Ltd | Information & communication | 2023 |
| Nattyseafood Limited | Hospitality | 2022 |
| Natural Darlings Ltd | Wholesale & retail | 2024 |
| Naturalis Limited | Wholesale & retail | 2020 |
| Nature's Abode Limited | Real estate | 2022 |
| NAV Group Ltd | Manufacturing | 2024 |
| Nava Health Limited | Health & social care | 2016 |
| Navashaba Limited | Real estate | 2024 |
| Navelgo Construction UK Limited | Construction | 2025 |
| Navora Global Limited | Wholesale & retail | 2026 |
| Nayim's Embroideries Limited | Manufacturing | 2001 |
| Nazareth Enterprises Limited | Information & communication | 2024 |
| Nazlim Limited | Real estate | 2022 |
| NB Tutors Ltd | Education | 2014 |
| Nbrw Limited | Professional & scientific | 2024 |
| NDK Patel Ltd | Real estate | 2025 |
| Ndnl Services Limited | Information & communication | 2021 |
| NDO Consultancy Ltd | Wholesale & retail | 2020 |
| Neacy Properties Limited | Construction | 2026 |
| Near East Academy Limited | Extraterritorial | 2013 |
| Near East College Limited | Extraterritorial | 2013 |
| Near East Limited | Extraterritorial | 2013 |
| Neev Advisory Limited | Professional & scientific | 2021 |
| Nell Crook Ltd | Wholesale & retail | 2017 |
| Nematrian Limited | Information & communication | 2009 |
| NEO Trend Ltd | Wholesale & retail | 2024 |
| Neonsun Limited | Information & communication | 2007 |
| Nephelai Recruitment Ltd | Administrative & support | 2012 |
| Neptunium Developments Ltd | Administrative & support | 2015 |
| Neste Ltd | Construction | 2025 |
| NET Cams Limited | Administrative & support | 2017 |
| NEVO79 Ltd | Hospitality | 2025 |
| New Being Ltd | Other services | 2018 |
| New Creation Records Ltd | Information & communication | 2025 |
| New Folio Limited | Administrative & support | 2009 |
| New Haven Kebabs & Pizzas Limited | Hospitality | 2018 |
| New Insight Analysis Ltd | Extraterritorial | 2013 |
| Newborn Limited | Hospitality | 2005 |
| Newmans ROW Ltd | Administrative & support | 2024 |
| Nexas 1 Properties Limited | Real estate | 2026 |
| Nexas Properties Ltd | Real estate | 2025 |
| Nexgen Climate & Power Ltd | Energy | 2025 |
| Nexogenous Digital Limited | Professional & scientific | 2023 |
| Nexpurpose Ltd | Professional & scientific | 2025 |
| Nexus Capital PVT Ltd | Real estate | 2026 |
| Nexus UK Developments Ltd | Information & communication | 2010 |
| Nexzora Trader Ltd | Wholesale & retail | 2025 |
| NG & DD Holdings Limited | Financial services | 2025 |
| NG & DD Properties Limited | Real estate | 2025 |
| NIC Homes Ltd | Real estate | 2025 |
| Nice Initiatives UK Limited | Wholesale & retail | 2024 |
| Niche Solutions (UK) Limited | Information & communication | 2006 |
| Nickbolt Ltd | Administrative & support | 2007 |
| Nighthawk F117 Limited | Professional & scientific | 2020 |
| Nimblesys Ltd | Information & communication | 2017 |
| Nirvana UK Investments Limited | Real estate | 2023 |
| Nitai Homes Ltd | Real estate | 2023 |
| Nivve’S Kitchen Ltd | Hospitality | 2024 |
| NJ Care Services Ltd | Health & social care | 2021 |
| NJM Property Solutions Ltd | Real estate | 2022 |
| NKD Consulting Limited | Professional & scientific | 2011 |
| NKS Marketing and Consulting Ltd | Hospitality | 2018 |
| NL Evans Consulting Ltd | Information & communication | 2024 |
| NLM Financial Services Limited | Professional & scientific | 2008 |
| NN Floor Sanding Ltd | Construction | 2025 |
| Nnsw Ltd | Health & social care | 2018 |
| NO 1 West Hill (Management) Limited | Construction | 2015 |
| NO.4 Blunt Road Limited | Administrative & support | 2005 |
| Noah & Nest Ltd | Wholesale & retail | 2026 |
| Noble Games Limited | Information & communication | 2010 |
| Nobu Properties Limited | Real estate | 2025 |
| Noluq. Ltd | Arts & recreation | 2023 |
| Noluthando Fadipe SLT Ltd | Health & social care | 2025 |
| Nomad SET Carpentry Ltd | Construction | 2025 |
| Nomadic Expression Ltd | Professional & scientific | 2021 |
| Norbury London Ltd | Real estate | 2025 |
| Norcot Management Limited | Households | 1986 |
| Norjix Investments Limited | Real estate | 2017 |
| Normanton Homes Limited | Construction | 2017 |
| Normanton Road (II) Management Company Limited | Households | 2001 |
| North Cyprus Turkish Airways Limited | Extraterritorial | 2014 |
| North Mobile Ltd | Wholesale & retail | 2024 |
| Northcliffe Properties Limited | Real estate | 2021 |
| Northern Accent Limited | Information & communication | 2013 |
| Northstar Advice Limited | Professional & scientific | 2023 |
| Northumberland Plumbing Limited | Construction | 2013 |
| Nostalgia Live Ltd | Arts & recreation | 2025 |
| Nothing BUT Flooring and Building Limited | Construction | 2013 |
| Nothing BUT Flooring Limited | Real estate | 2010 |
| Nothing BUT Property Limited | Real estate | 2016 |
| Nottingham Road (Croydon) Management Limited | Households | 2016 |
| Nouvex Limited | Administrative & support | 2014 |
| Novacleanuk Ltd | Administrative & support | 2025 |