| Neighbourhood Health Ventures Ltd | Health & social care | 2026 |
| Neil Hewitt-Dudding Limited | Professional & scientific | 2020 |
| Neil Potter Civil Engineering & Construction Ltd | Construction | 2016 |
| Nelsonpublichouse Limited | Hospitality | 2016 |
| Neoxspace Design Limited | Professional & scientific | 2019 |
| Nepa UK Limited | Professional & scientific | 2010 |
| Nest Studios Group Ltd | Financial services | 2025 |
| Nest Studios Limited | Administrative & support | 2008 |
| NET Zero and Clean Energy Solutions Ltd | Construction | 2025 |
| Netclear Solutions Ltd | Information & communication | 2020 |
| Netix.Ai Ltd | Information & communication | 2025 |
| Neve Atelier Ltd | Wholesale & retail | 2026 |
| Neville & More Limited | Wholesale & retail | 1979 |
| New Dawn Creative Limited | Wholesale & retail | 2006 |
| New Hope Christian Counselling | Other services | 2011 |
| New Horizon Logistics Limited | Transport & logistics | 2003 |
| New Kingswood Farm Limited | Agriculture & fishing | 2012 |
| New Life Real Estate Ltd | Real estate | 2025 |
| New Volition Ltd | Information & communication | 2021 |
| Newanice Ltd | Wholesale & retail | 2025 |
| Newbie by Kappahl Limited | Wholesale & retail | 2017 |
| Newbold Building Services Limited | Construction | 2018 |
| Newbold Buildings Limited | Real estate | 2004 |
| Newbold Design (Midlands) Limited | Administrative & support | 2003 |
| Newbury Commercial Glazing Limited | Manufacturing | 2001 |
| Newhouse Barbering Ltd | Other services | 2015 |
| Newmond Administration Limited | Professional & scientific | 1947 |
| Newrock Construction Ltd | Construction | 2018 |
| Next Chapter Leadership Coaching & Training Solutions LLP | | 2025 |
| Nexus BJJ Ltd | Arts & recreation | 2026 |
| Nexus Civils Ltd | Construction | 2019 |
| Nexus Data Communications Limited | Information & communication | 1992 |
| NG Future Holdings Limited | Other services | 2022 |
| Niche Electrics Ltd | Professional & scientific | 2023 |
| Nichol Limited | Administrative & support | 2004 |
| Nickes.Com - Sports & Concert Trips Ltd | Administrative & support | 2010 |
| Nicolle Consulting Services Ltd | Information & communication | 2017 |
| Nieche Consulting Ltd | Professional & scientific | 2018 |
| Nigel ROE Physio Limited | Health & social care | 2007 |
| Nightingale Residents Leamington Ltd | Households | 2024 |
| Nightingales Cleaning Agency Ltd | Administrative & support | 2022 |
| Nightingales Recruitment Care Agency Ltd | Administrative & support | 2021 |
| Nihal J Limited | Real estate | 2026 |
| Nijjar Property Management Services Limited | Real estate | 2020 |
| Nikita Thomas Ltd | Health & social care | 2024 |
| Nilvent Ltd | Manufacturing | 2021 |
| Nimbus Data Services Limited | Administrative & support | 2026 |
| Nimbus Property Systems Limited | Information & communication | 2012 |
| Nine Parade Ltd | Real estate | 2026 |
| Nino's Italian Deli Ltd | Wholesale & retail | 2023 |
| Nino's Trattoria Ltd | Hospitality | 2021 |
| NJJ Property Development Ltd | Construction | 2021 |
| NJJ Property Rental Ltd | Real estate | 2021 |
| NJM Comms Consulting Ltd | Professional & scientific | 2025 |
| NK Builders Group Ltd | Construction | 2026 |
| NL Jewellery Supplies Ltd | Wholesale & retail | 2023 |
| NLE Carpets and Flooring Ltd. | Wholesale & retail | 2005 |
| NO 9 Market Place Management Company Limited | Real estate | 2012 |
| NO More Flat Pack Ltd | Manufacturing | 2015 |
| NO.3 Limited | Administrative & support | 2014 |
| Nobelia Laundry Ltd | Other services | 2025 |
| Nobi Smart Lamps Limited | Manufacturing | 2024 |
| Noble Itech Ltd | Professional & scientific | 2020 |
| Noeti Limited | Information & communication | 2025 |
| Noisegate Media Limited | Information & communication | 2007 |
| Noisegate Studios Ltd | Information & communication | 2020 |
| Nomi Associates Limited | Professional & scientific | 2011 |
| Nomono Sound Limited | Manufacturing | 2022 |
| Nomoq Limited | Manufacturing | 2023 |
| Nonte Limited | Information & communication | 2025 |
| Noodle Bear Limited | Financial services | 2022 |
| Nordic Design House Limited | Wholesale & retail | 2023 |
| Northend Management (Willows) Limited | Households | 2019 |
| Northleigh House School Ltd | Education | 2010 |
| Northquest Engineering Ltd | Manufacturing | 2025 |
| Norton Grange (Norton Lindsay) Management Limited | Administrative & support | 2006 |
| Norton Grange Residents Association Limited | Households | 1987 |
| Norwegian-British Chamber of Commerce | Other services | 1908 |
| Nostos Investments Limited | Financial services | 2015 |
| Nothing Added Ltd | Manufacturing | 2025 |
| Nova Engineering Consultancy Ltd | Professional & scientific | 2026 |
| Nova Structura Ltd | Other services | 2017 |
| Novachemica Limited | Wholesale & retail | 2025 |
| Novarr Limited | Administrative & support | 2008 |
| Novigo Solutions Limited | Information & communication | 2022 |
| Novus Images Ltd | Information & communication | 2025 |
| NOW Then Energy Limited | Professional & scientific | 2020 |
| NOW Thrive Limited | Extraterritorial | 2023 |
| NS Optimum Group (Holdings) Limited | Financial services | 2018 |
| NS Optimum Holdings Limited | Education | 2011 |
| NS Optimum Limited | Manufacturing | 1995 |
| NS85 Ltd | Manufacturing | 2020 |
| NSC National Saddle Centre Limited | Wholesale & retail | 2013 |
| NT Mitchell Ltd | Professional & scientific | 2026 |
| Ntcw Ltd | Administrative & support | 2011 |
| Nuad Thai Massage and Spa Centre Limited | Other services | 2012 |
| Numidia Education and Training Limited | Professional & scientific | 2000 |
| Nurse Seekers Ltd | Administrative & support | 2014 |
| Nurturing Development Educational Psychology Limited | Education | 2024 |
| Nurturing Progress Ltd | Education | 2023 |