| Nasara Sharifan Limited | Hospitality | 2024 |
| Nassa Travel Ltd | Administrative & support | 2016 |
| Nasttrans Ltd | Transport & logistics | 2025 |
| Natalie Hoang Limited | Financial services | 2011 |
| Natalie Powell Limited | Financial services | 2015 |
| Natasha Marie Hair Ltd | Other services | 2021 |
| Nathan and Grace Limited | Professional & scientific | 2023 |
| Nathan James Consulting Ltd | Administrative & support | 2019 |
| Nathan Owens Blade Technician Services Ltd | Manufacturing | 2026 |
| National Vehicle Rescue Ltd | Wholesale & retail | 2026 |
| Native Foods Limited | Manufacturing | 2017 |
| Natka Ltd | Transport & logistics | 2020 |
| Naton Ltd | Transport & logistics | 2021 |
| Natural Enterprise Ltd | Administrative & support | 1997 |
| Natural Therapy for ALL Ltd | Other services | 2007 |
| Natural Woodland Burials Ltd | Other services | 2021 |
| Naturally Being Limited | Education | 2025 |
| Natures Images Foundation | Other services | 2011 |
| Natures Images Ltd | Information & communication | 2008 |
| Navajam Group Limited | Professional & scientific | 2006 |
| Naveen Business Solutions Ltd | Real estate | 2014 |
| Navigational Intelligence Ltd | Manufacturing | 2024 |
| Nawzad(Npt) Ltd | Transport & logistics | 2026 |
| Nayah Cosmetics Ltd | Wholesale & retail | 2024 |
| Nayr Consultants Limited | Construction | 2016 |
| NAZ Kebab House Ltd | Hospitality | 2019 |
| Nazar Drinks Ltd | Manufacturing | 2022 |
| NB Roots Ltd | Arts & recreation | 2024 |
| NCC Commercial Services Limited | Other services | 2025 |
| Nccg Trading Limited | Hospitality | 2010 |
| NDI Igbo in Newport CIC | Education | 2025 |
| Ndils Daily Care Ltd | Health & social care | 2025 |
| Nealon Jones Limited | Financial services | 2006 |
| NEB7 Limited | Arts & recreation | 2021 |
| Neek Properties Limited | Real estate | 2024 |
| Negotiation Psychology Limited | Professional & scientific | 2016 |
| Neha Infotech Limited | Information & communication | 2012 |
| Neha Residency Limited | Real estate | 2025 |
| Nelly's Barn Limited | Hospitality | 2015 |
| Nelly's Vegan Barn Ltd | Hospitality | 2022 |
| Nelnatautos Ltd | Wholesale & retail | 2024 |
| Nelson House (Ryde) Management Company Limited | Households | 2007 |
| Nelson Mansions Management Limited | Real estate | 2017 |
| Nemea Limited | Professional & scientific | 1998 |
| Nerivik Limited | Real estate | 2023 |
| Netball Noire Ltd | Arts & recreation | 2025 |
| Netcomposite Ltd | Information & communication | 2009 |
| Netline Recruitment Ltd | Administrative & support | 2026 |
| Netly Ltd | Information & communication | 2019 |
| Netpal Ltd | Information & communication | 2016 |
| Neurodivergence Ltd | Health & social care | 2023 |
| Neurodivergence Support Ltd | Health & social care | 2023 |
| Neurogen Limited | Health & social care | 2017 |
| Neurosign UK Ltd | Manufacturing | 2022 |
| Neutral Carbon Solutions Ltd | Professional & scientific | 2020 |
| Never Still Ltd | Professional & scientific | 2014 |
| Nevoy Ltd | Real estate | 2024 |
| New Aspect Installations Ltd | Construction | 2014 |
| New Basmati Limited | Hospitality | 2025 |
| New Best Hand Car Wash Ltd | Wholesale & retail | 2018 |
| New Dawn Properties & Investments Ltd | Real estate | 2024 |
| New Dragon 88 Limited | Hospitality | 2018 |
| New Fernleigh Company Limited | Households | 2011 |
| New Flame Ltd | Construction | 2017 |
| New Food-Specialist Ltd | Other services | 2019 |
| New Forge Properties Ltd | Construction | 2019 |
| New Heritage (Bordon) Management Company Limited | Households | 2016 |
| New Honour Garden Ltd | Hospitality | 2021 |
| New Horizons Animal Welfare C.I.C. | Agriculture & fishing | 2023 |
| New Inn 357 Limited | Real estate | 2018 |
| New Inn Perfect Pint Ltd | Hospitality | 2024 |
| New Lahore Ltd | Hospitality | 2018 |
| New Lighthouse Inn Ltd | Hospitality | 2012 |
| New MAN Movement Limited | Arts & recreation | 2025 |
| New Management Services Limited | Professional & scientific | 2025 |
| New Mirchi Ltd | Hospitality | 2015 |
| New NTS Newport Ltd | Transport & logistics | 2025 |
| New Pak-Food Specialist PVT Ltd | Hospitality | 2025 |
| New Pastures Home Ltd | Manufacturing | 2019 |
| New Season Healthcare Ltd | Health & social care | 2014 |
| New Servu Taxis Ltd | Transport & logistics | 2021 |
| New Street 1969 Limited | Extraterritorial | 2014 |
| New Street Car Care Ltd | Wholesale & retail | 2019 |
| New Twinz Fishbar Ltd | Hospitality | 2026 |
| New Wave Aesthetics Fashion Label Limited | Wholesale & retail | 2026 |
| New WIN21 Ltd | Wholesale & retail | 2021 |
| New World 168 Limited | Hospitality | 2024 |
| New-Clad Limited | Construction | 2001 |
| Newbridge Amusements Limited | Arts & recreation | 2014 |
| Newbridge Charitable Foundation | Education | 2011 |
| Newbridge CON Club Limited | Hospitality | 2025 |
| Newbridge Construction Holdings Limited | Financial services | 2026 |
| Newbridge Motors (Wales) Limited | Wholesale & retail | 2014 |
| Newbridge Real Estate Limited | Real estate | 2021 |
| Newbridge Superstore Ltd | Wholesale & retail | 2025 |
| Newclose County Cricket Ground Limited | Arts & recreation | 2006 |
| Newco (Wales) Limited | Professional & scientific | 2005 |
| Newco Holdings (Cardiff) Limited | Financial services | 2018 |
| Newco Interests Ltd | Construction | 2001 |
| Newcombe Installations Limited | Construction | 2008 |