| Neil Cheley Limited | Administrative & support | 2006 |
| Neil Cross Limited | Professional & scientific | 2012 |
| Nellie-May Homes Ltd | Real estate | 2019 |
| Nelson & Sons Roofing Limited | Construction | 2025 |
| NEO Genesis Ltd | Administrative & support | 2013 |
| NEO MED Holdings Limited | Financial services | 2019 |
| NEO Medical Ltd | Health & social care | 2018 |
| Neogen Plasma Ltd | Manufacturing | 2022 |
| Neon 160 Limited | Real estate | 2021 |
| Neptune Environmental Consulting Limited | Professional & scientific | 2021 |
| Neruda Holdings Limited | Financial services | 2022 |
| Nervano Vodka Ltd | Wholesale & retail | 2021 |
| Nesting House Ltd | Extraterritorial | 2024 |
| Nestive Ltd | Manufacturing | 2025 |
| NET Sero Ltd | Construction | 2023 |
| Neta Technical Ltd | Manufacturing | 2020 |
| Netads Limited | Information & communication | 1995 |
| Netbop Technologies Ltd | Information & communication | 2004 |
| Netfit Communications Limited | Construction | 2019 |
| Netnodes Limited | Information & communication | 2008 |
| Neto Fibre Ltd | Information & communication | 2024 |
| Netwone Ltd | Construction | 2021 |
| Network Wills Ltd | Professional & scientific | 2023 |
| Neuadd Cwmllynfell Hall. | Other services | 1995 |
| Neuro Expression CIC | Education | 2023 |
| Neurodivergent Matters Limited | Administrative & support | 2024 |
| Neurokind Careers and Inclusion CIC | Administrative & support | 2025 |
| Neurokind Careers Ltd | Administrative & support | 2025 |
| Neutron Books Limited | Wholesale & retail | 2022 |
| NEV Construction Ltd | Construction | 2023 |
| New Bellgate Properties Limited | Real estate | 2016 |
| New Black Light Machine Ltd | Information & communication | 2019 |
| New Dine Ltd | Hospitality | 2019 |
| New Forest Cabs Swansea Limited | Transport & logistics | 2019 |
| New Home Quality Control Ltd | Construction | 2018 |
| New Image Shopfitters Ltd | Administrative & support | 2006 |
| New Inn Exterprises Ltd | Hospitality | 2026 |
| New Shades Ltd | Hospitality | 2022 |
| New Shoots Garden Services Ltd. | Administrative & support | 2018 |
| New Style Barber Neath Ltd | Other services | 2020 |
| New Summit Services Limited | | 1981 |
| New Wave Locum Limited | Professional & scientific | 2022 |
| New Wine Cymru Limited | Education | 2004 |
| Newbridge Tandoori Limited | Wholesale & retail | 2013 |
| Newlands Building Ltd | Construction | 2021 |
| Newport Developments SPV 1 Ltd | Construction | 2022 |
| Newport Self Storage Ltd | Transport & logistics | 2000 |
| Newsmile Orthodontic LAB Limited | Health & social care | 2014 |
| Newstar International Limited | Arts & recreation | 2024 |
| Newton Barnes Joinery & Construction Ltd | Construction | 2020 |
| Newton Barnes Joinery Ltd | Construction | 2017 |
| Newton Barnes Ltd | Construction | 2026 |
| Newton Ground Rents Limited | Real estate | 2021 |
| Newton Property Estates Ltd | Real estate | 2025 |
| Newtown Cars Midwales Ltd | Transport & logistics | 2017 |
| Nexaura Global Ltd | Information & communication | 2026 |
| Nexcar Ltd | Wholesale & retail | 2024 |
| Nexcar Prestige Limited | Wholesale & retail | 2024 |
| Nexosters Ltd | Construction | 2026 |
| Nexphase Distribution Ltd | Wholesale & retail | 2025 |
| Next GEN Heating Ltd | Construction | 2025 |
| Next GEN Solar Distribution Ltd | Wholesale & retail | 2025 |
| Next N3STS Relocations Ltd | Hospitality | 2025 |
| Next World Trade UK Ltd | Wholesale & retail | 2024 |
| Nextchaptercontent Ltd | Information & communication | 2025 |
| Nextcolour Limited | Real estate | 1995 |
| Nextgen Venturi Limited | Financial services | 2006 |
| Nextus Holdings Limited | Administrative & support | 2026 |
| Nexus Entertainment Services Limited | Information & communication | 2004 |
| Nexus Management Consulting Ltd | Professional & scientific | 2024 |
| Nexus Properties Cardiff Ltd | Construction | 2023 |
| Nexus Relations Limited | Financial services | 2014 |
| NF Garages Limited | Real estate | 2022 |
| NFD Group Limited | Information & communication | 2026 |
| Ngfd Limited | Professional & scientific | 2023 |
| NGN Concessions Limited | Other services | 2009 |
| NGN Distribution Limited | Manufacturing | 2003 |
| NGU Ltd | Information & communication | 2025 |
| Nhkg Investing Limited | Real estate | 2023 |
| Nice Food 888 Ltd | Hospitality | 2023 |
| Nice Touch Tiling Ltd | Extraterritorial | 2021 |
| Nice Weight Bowls Ltd | Wholesale & retail | 2026 |
| Niche-Co HR Ltd. | Administrative & support | 2015 |
| Nicheco Holdings Ltd | Financial services | 2023 |
| Nicholas Bresnan Limited | Transport & logistics | 2006 |
| Nicholas Michael Estate Agents Limited | Real estate | 2004 |
| Nicholaston Farm Ltd | Agriculture & fishing | 2015 |
| Nicholaston House Limited | Hospitality | 2026 |
| Nicholaston Retreat Centre Ltd | Hospitality | 2025 |
| Nicholl Investment Research Ltd | Financial services | 2021 |
| Nicholl Street Management Limited | Real estate | 2007 |
| Nick Jones Tiling Limited | Construction | 2009 |
| Nick Quirke Art Limited | Arts & recreation | 2021 |
| Nick Rose Global Consulting Ltd | Professional & scientific | 2022 |
| Nicolacorp Limited | Extraterritorial | 2011 |
| Nicotine Freak Limited | Information & communication | 2020 |
| Niepan Limited | Wholesale & retail | 2015 |
| NIF Consulting Limited | Information & communication | 2022 |
| NIF Group Limited | Information & communication | 2020 |
| Nigel Thomas Plant Hire Limited | Construction | 2002 |