| NAU Club Ltd | Other services | 2023 |
| Naude Domestic Services Ltd | Health & social care | 2025 |
| Naunton Downs Golf Club Limited | Arts & recreation | 1992 |
| Naunton Golf Ltd | Arts & recreation | 2026 |
| Naunton IT Ltd | Information & communication | 2009 |
| Naunton Park Close Residents Association Limited | Households | 1967 |
| Nauti Disputes Ltd | Professional & scientific | 2026 |
| Nauti Holdings Ltd | Financial services | 2022 |
| Nauti Links Ltd | Real estate | 2022 |
| Navi Engineering Limited | Professional & scientific | 2025 |
| Navigator Safety Limited | Extraterritorial | 1989 |
| Navitech Marine Ltd | Professional & scientific | 2017 |
| Nazaray Ltd | Wholesale & retail | 2024 |
| Nazura Foods Ltd | Hospitality | 2025 |
| NBK Enterprises Limited | Wholesale & retail | 2025 |
| NCF Engineering Holdings Limited | Professional & scientific | 2012 |
| NCF Engineering Limited | Professional & scientific | 2012 |
| Ncts Limited | Professional & scientific | 1995 |
| ND Skin & Body Clinic Limited | Other services | 2026 |
| Nd-Landrover Services Ltd | Wholesale & retail | 2018 |
| NDH Enterprises Limited | Professional & scientific | 2005 |
| NE Flowers Limited | Wholesale & retail | 2017 |
| Neartech Search Ltd | Administrative & support | 2023 |
| Nebuer Household Services Ltd | Administrative & support | 2022 |
| Nectare Limited | Information & communication | 1999 |
| Neek Supplements Ltd | Manufacturing | 2022 |
| Neekan Limited | Real estate | 2013 |
| Nei-Web Ltd | Information & communication | 2026 |
| Neidr Ltd | Manufacturing | 2025 |
| Neighbourhood Social Network Ltd | Information & communication | 2015 |
| Neil Dean Boiler Care Limited | Construction | 2015 |
| Neil Gayler & Co Limited | Administrative & support | 2003 |
| Neil Martin Limited | Education | 2014 |
| Neil Morgan Design Limited | Arts & recreation | 2015 |
| Neil Randle Financial Services Limited | Financial services | 2026 |
| Neill Carruthers Consulting Ltd | Professional & scientific | 2013 |
| Neksato Technology Limited | Wholesale & retail | 2025 |
| Nela Trowels UK Limited | Extraterritorial | 2014 |
| Nelbase Ltd | Information & communication | 2012 |
| Nelia Nominees Limited | Professional & scientific | 2016 |
| Nell Homes Limited | Hospitality | 2021 |
| Nelson Care Services Limited | Health & social care | 2022 |
| Nelson House (Ealing) Limited | Households | 1989 |
| Nem-Con Elevators Limited | Construction | 2014 |
| Nemcon Estates Ltd | Real estate | 2007 |
| Nemesec Ltd | Information & communication | 2025 |
| NEO Orthodontics Limited | Health & social care | 2017 |
| Nephele Technologies Limited | Information & communication | 2017 |
| Nephos Accountants Limited | Professional & scientific | 2022 |
| Nephos Corporate Services Limited | Professional & scientific | 2021 |
| Nephos Directors Limited | Professional & scientific | 2020 |
| Nephos Group Limited | Professional & scientific | 2011 |
| Nephos Wealth Limited | Professional & scientific | 2022 |
| Neptune Apartments Limited | Hospitality | 2021 |
| Neptune Infrastructure Associates Ltd | Professional & scientific | 2023 |
| Nero Ltd | Transport & logistics | 2018 |
| Nesslegrove Technologies Limited | Other services | 1986 |
| Nest Music Group Limited | Information & communication | 2018 |
| NET Laureate Ltd | Information & communication | 2025 |
| NET Ltd | Information & communication | 2022 |
| NET Zero Research | Other services | 2009 |
| Netball FUN League (Cheltenham) Limited | Arts & recreation | 2020 |
| Netfinity Ltd | Wholesale & retail | 2025 |
| Netherend Foods Limited | Information & communication | 1993 |
| Netizen Solutions Ltd | Professional & scientific | 2025 |
| Netley Hall Lettings Limited | Real estate | 2019 |
| Netsoft Limited | Information & communication | 2010 |
| Nett Transition Ltd | Professional & scientific | 2017 |
| Netvantis Ltd | Information & communication | 2023 |
| Network Connections (UK) Limited | Information & communication | 1999 |
| Networktigers Ltd | Professional & scientific | 2018 |
| NEU Kitchens Limited | Wholesale & retail | 2020 |
| Neural Solutions Limited | Professional & scientific | 1992 |
| Neurospicy Studio Ltd | Information & communication | 2025 |
| Neusys Ltd | Information & communication | 2019 |
| Neuu Ltd | Professional & scientific | 2024 |
| Neuville Grid Data Management Limited | Professional & scientific | 2017 |
| Nevaeh Roofing Limited | Construction | 2024 |
| Nevari International Limited | Information & communication | 2024 |
| Never Felt SO Good Limited | Manufacturing | 2020 |
| Neverlight Systems Limited | Information & communication | 2025 |
| Neville Associates Limited | Real estate | 2009 |
| Nevro Medical Limited | Administrative & support | 2010 |
| New & Tilley Limited | Construction | 2003 |
| New Barn Cars Limited | Wholesale & retail | 2002 |
| New Blinds, Shutters & Awnings Ltd | Manufacturing | 2014 |
| New Bohemia Music Ltd | Arts & recreation | 2020 |
| New Ceilings & Partitions Ltd | Construction | 2021 |
| New Century Care Limited | Administrative & support | 1997 |
| New Century Finance & Leasing Limited | Other services | 1993 |
| New Club Limited | Extraterritorial | 2024 |
| New Cold Insulation Ltd | Construction | 2024 |
| New Company Formations Ltd | Administrative & support | 2009 |
| New Dawn at Stonehouse (NO. 1) Management Company Limited | Households | 2026 |
| New Dawn Homes Limited | Construction | 2004 |
| New Dawn Lettings Ltd | Real estate | 2018 |
| New Eco Homes Limited | Real estate | 2015 |
| New Kensington Capital Limited | Financial services | 2008 |
| New Lease Properties Limited | Real estate | 2022 |
| New Shoots Consultancy Ltd | Professional & scientific | 2018 |