| Nextage Imperial Consultant Limited | Education | 2025 |
| Nextfinds Ltd | Wholesale & retail | 2025 |
| Nextgen Bristol UK Ltd | Construction | 2026 |
| Nextgen Caterers Ltd | Hospitality | 2019 |
| Nextgen Circle CIC | Education | 2021 |
| Nextgen Degital Solutions UK Limited | Information & communication | 2026 |
| Nextgen Electrical Contractors Ltd. | Construction | 2017 |
| Nextgen Movers Ltd | Wholesale & retail | 2024 |
| Nextgen Surveying Ltd | Professional & scientific | 2025 |
| Nextgen Talent Ltd | Administrative & support | 2025 |
| Nextgen Young People's Services Ltd | Health & social care | 2026 |
| Nextin Group Ltd | Information & communication | 2014 |
| Nextiva UK Ltd | Information & communication | 2017 |
| Nextkart Ltd | Wholesale & retail | 2025 |
| Nextplan Technology and Mobile Limited | Wholesale & retail | 2022 |
| Nextpower Trevemper Limited | Energy | 2011 |
| Nextstephelp Ltd | Professional & scientific | 2021 |
| Nextwave AI & Mobile Solutions Ltd | Information & communication | 2025 |
| Nextzent Ltd | Wholesale & retail | 2025 |
| Nexum (Group) Limited | Information & communication | 2004 |
| Nexum Software Limited | Information & communication | 2004 |
| Nexural Limited | Information & communication | 2025 |
| Nexus Carbon Management Limited | Professional & scientific | 2015 |
| Nexus Crown Ltd | Wholesale & retail | 2026 |
| Nexus Data & AI Limited | Information & communication | 2026 |
| Nexus Electrical Services Ltd | Construction | 2015 |
| Nexus Holdings ( South West) Limited | Construction | 2018 |
| Nexus Interim Management Limited | Administrative & support | 1997 |
| Nexus of Bath Limited | Construction | 2011 |
| Nexus QR Ltd | Wholesale & retail | 2024 |
| Nexus Venture Ltd | Wholesale & retail | 2022 |
| Nexus Vitality Clinic Ltd | Health & social care | 2025 |
| NEXUS2112 ICT Services Limited | Wholesale & retail | 2025 |
| Nexusai Marketing Solutions Ltd | Information & communication | 2023 |
| NEZ Demolition Ltd | Construction | 2024 |
| NF Consulting Limited | Professional & scientific | 2023 |
| NF Courier Ltd | Transport & logistics | 2023 |
| NF Vending Ltd | Other services | 2024 |
| NFA Global Limited | Wholesale & retail | 2016 |
| NFC Inventories Limited | Administrative & support | 2014 |
| Nfgu Ltd | Wholesale & retail | 2015 |
| NFO Bristol Limited | Hospitality | 2021 |
| NFP Finance Solutions Limited | Professional & scientific | 2019 |
| Nfp&A Holdings Limited | Professional & scientific | 2025 |
| NFV Logistics Ltd | Transport & logistics | 2022 |
| NG Architech Solutions Ltd | Information & communication | 2013 |
| NG Decorators Ltd | Construction | 2023 |
| NG Nailsea Limited | Hospitality | 2018 |
| NG Technical Publications Limited | Professional & scientific | 2025 |
| NG1 Consulting Ltd | Information & communication | 2019 |
| Ngbpharma Limited | Health & social care | 2017 |
| Ngbr Pro Ltd | Other services | 2024 |
| Ngier Ltd | Agriculture & fishing | 2011 |
| NGP3 Limited | Professional & scientific | 2009 |
| NGS Groundworks & Surfacing Ltd | Construction | 2023 |
| NGS Medicolegal Limited | Health & social care | 2010 |
| Nguyen Structural Services Ltd | Professional & scientific | 2024 |
| NGW Property Limited | Real estate | 2020 |
| Ngwa Care Ltd | Health & social care | 2026 |
| NH Drylining & Plastering Ltd | Construction | 2006 |
| NH Flooring Limited | Construction | 2003 |
| NH Techno Ltd | Information & communication | 2016 |
| NHN Transport Services Ltd | Transport & logistics | 2020 |
| Nhyphenovation Limited | Real estate | 2003 |
| Niai Ltd | Transport & logistics | 2024 |
| Niall Design Limited | Manufacturing | 2023 |
| Niall Foods Ltd | Hospitality | 2021 |
| Niall Sullivan Orthopaedics Ltd | Health & social care | 2021 |
| Niantic International Holdings Limited | Financial services | 2018 |
| Niantic International Limited | Information & communication | 2018 |
| Niantic International Technology Limited | Information & communication | 2018 |
| Niantic Spatial UK Limited | Information & communication | 2025 |
| Niaz Letting Ltd | Real estate | 2025 |
| Niba Solutions Limited | Professional & scientific | 2019 |
| Nibblers (UK) Ltd | Wholesale & retail | 2000 |
| Nibley Mill Car Park Management Company Limited | Households | 2024 |
| Nibra Signs Limited | Manufacturing | 2000 |
| NIC Hurst Limited | Arts & recreation | 2018 |
| Nic's Sandwich Station Ltd | Hospitality | 2022 |
| Nic-Ex Ltd | Financial services | 2020 |
| Nice 2 B Clean Ltd | Other services | 2024 |
| Nice Code NO Crashy Ltd | Information & communication | 2023 |
| Nice Knots Ltd | Manufacturing | 2024 |
| Nice TRY Productions Ltd | Information & communication | 2025 |
| Niche Environment and Research Ltd | Professional & scientific | 2015 |
| Niche Homes Investments Limited | Real estate | 2025 |
| Niche Nail Studio Ltd | Other services | 2024 |
| Niche Probability Limited | Information & communication | 2018 |
| Niche Renovations Ltd | Construction | 2019 |
| Nichesoft Limited | Information & communication | 2023 |
| Nicholas Associates Limited | Professional & scientific | 2020 |
| Nicholas Food Ltd | Hospitality | 2016 |
| Nicholas Morley Architects Limited | Professional & scientific | 2003 |
| Nicholas Property Scourcing Ltd | Administrative & support | 2023 |
| Nicholas Seaton Limited | Professional & scientific | 2013 |
| Nicholas Wanderers AFC Ltd | Arts & recreation | 2025 |
| Nicholls Building Services Ltd | Construction | 2020 |
| Nicholls Court (Management) Limited | Households | 1976 |
| Nicholls Stevens (Financial Services) Limited | Administrative & support | 1994 |
| Nicholls Stevens Legal Services Limited | Extraterritorial | 2011 |