| Nevertity Ltd | Manufacturing | 2024 |
| New Care (Egerton) Holdings Limited | Financial services | 2021 |
| New Claire Wine Ltd | Wholesale & retail | 2012 |
| New Dawn Psychology Limited | Education | 2021 |
| New Fenchurch Consulting Ltd | Professional & scientific | 2014 |
| New Frontiers Consultancy Limited | Professional & scientific | 2021 |
| New Homes Mortgage Solutions Limited | Financial services | 2004 |
| New Leaf Haven Homes Ltd | Health & social care | 2025 |
| New Living Property Ltd | Hospitality | 2023 |
| New Look Smile Limited | Professional & scientific | 2022 |
| New Love Limited | Wholesale & retail | 2007 |
| New Roots Consultancy Ltd | Professional & scientific | 2014 |
| New Space Margate Ltd | Professional & scientific | 2011 |
| New Style Barber Altrincham Ltd | Other services | 2024 |
| New Ways of Working Limited | Information & communication | 2022 |
| Newa Homes Limited | Real estate | 2025 |
| Newann Limited | Real estate | 2023 |
| Newbatt Services Ltd | Information & communication | 2020 |
| Newborough Consulting Limited | Professional & scientific | 2021 |
| Newbury Court (Jesmond Road) Management Company Limited | Households | 1991 |
| Newbury Properties Limited | Real estate | 2012 |
| Newby Bridge Properties Limited | Real estate | 2003 |
| Newell Property Holdings Ltd | Real estate | 2025 |
| Newgate Windows & Joinery Ltd | Construction | 2022 |
| Newgen Academy C.I.C. | Health & social care | 2025 |
| Newington Court Management Limited | Households | 1978 |
| Newmed Energy Balkan Limited | Mining & quarrying | 2024 |
| Newport Court RTM Company Limited | Households | 2025 |
| Newton Healthcare Limited | Real estate | 2004 |
| Newton Property Holdings Limited | Financial services | 2023 |
| Nexa Associates Ltd | Administrative & support | 2026 |
| Nexa Search Ltd | Administrative & support | 2026 |
| Nexalert Ltd | Wholesale & retail | 2006 |
| Nexambyt Limited | Administrative & support | 2024 |
| Nexara IMS Ltd | Information & communication | 2026 |
| Next Automation Limited | Administrative & support | 2014 |
| Next Facet Ltd | Information & communication | 2023 |
| Next HOP Solutions Ltd | Information & communication | 2025 |
| Next Upgrade Academy Limited | Education | 2025 |
| NEXT11VEN Ltd | Information & communication | 2025 |
| Nextgen Aviation Ltd | Transport & logistics | 2022 |
| Nextschema Limited | Professional & scientific | 2025 |
| Nextstage Consultancy Services Limited | Professional & scientific | 2025 |
| Nextwave Transformation Limited | Professional & scientific | 2025 |
| Nexus Commercial Finance Limited | Financial services | 2016 |
| Nexus Talent Ltd | Extraterritorial | 2025 |
| Nexuss Tech Ltd | Wholesale & retail | 2024 |
| NFA Recovery Ltd | Transport & logistics | 2016 |
| NG Sports Limited | Education | 2026 |
| NGC Management (UK) Ltd | Financial services | 2020 |
| NGJ Consultancy Services Ltd | Professional & scientific | 2015 |
| NGL Consulting Limited | Professional & scientific | 2023 |
| NGM International Ltd | Other services | 2026 |
| NH Bull Bay Ltd | Real estate | 2025 |
| NH DOL Peris Limited | Real estate | 2025 |
| NH Llanberis Ltd | Real estate | 2025 |
| NH Physiotherapy & Performance Ltd | Health & social care | 2024 |
| NH Regen Ltd | Construction | 2024 |
| NH Rhosneigr Ltd | Real estate | 2025 |
| NH Vcloud Limited | Administrative & support | 2010 |
| NHR Limited | Construction | 1994 |
| Niagara Court (Stockport) Management Company Limited | Households | 2002 |
| Niall Wright Consulting Limited | Professional & scientific | 2026 |
| Nice Homes (England ) Limited | Real estate | 2021 |
| Niche Legal Limited | Professional & scientific | 2019 |
| Nicholls Solicitors Limited | Professional & scientific | 2006 |
| Nichols 3N Limited | Real estate | 2011 |
| Nichols Estates Limited | Real estate | 2016 |
| Nichols Family Ltd | Financial services | 2024 |
| Nichols Forest Ltd | Agriculture & fishing | 2026 |
| Nichols MCR Limited | Construction | 2026 |
| Nichols Overseas Limited | Households | 2015 |
| Nichols Securities Ltd | Real estate | 2024 |
| Nichols Ventures Limited | Real estate | 2012 |
| Nick Day Technologies Ltd | Information & communication | 2017 |
| Nickson & Sons Limited | Real estate | 2025 |
| Nicky's Bootcamp Ltd | Arts & recreation | 2025 |
| Nico 92 Ltd | Real estate | 2024 |
| Nicolaisen Ltd | Information & communication | 2022 |
| Nidhi Limited | Information & communication | 2004 |
| Nidor Diagnostics Limited | Professional & scientific | 2016 |
| Nifty Media Limited | Information & communication | 2021 |
| Nigel Doherty (Plumbing and Building) Limited | Construction | 2006 |
| Nigel Lambert Business Services Limited | Professional & scientific | 2025 |
| Nigel Taylor Bespoke Furniture Ltd | Construction | 2017 |
| Night Walks Ltd | Information & communication | 2026 |
| Nightblur Limited | Wholesale & retail | 2023 |
| Nightingale Partnership (Bolton) Ltd | Wholesale & retail | 2021 |
| NIK Lakhani Limited | Professional & scientific | 2013 |
| NIK NAK International Limited | Real estate | 1997 |
| NIK NAK World 1 Limited | Manufacturing | 2019 |
| Nikal Britannic Residential Limited | Households | 2007 |
| Niki Gkagkari Ltd | Administrative & support | 2022 |
| Niksan Technologies Ltd | Information & communication | 2016 |
| Nina Durrani Consulting Limited | Administrative & support | 2014 |
| Nine Gorsey Lane Apartments Company Limited | Administrative & support | 2011 |
| Nine Lives Media Limited | Professional & scientific | 1998 |
| Nine the Firs Property Management Co. Limited | Real estate | 1997 |
| Ninety One Law Ltd | Professional & scientific | 2026 |
| Ninety Two Ventures Group Ltd. | Professional & scientific | 2024 |