| Nestfy Ltd | Information & communication | 2026 |
| Nestworksliving Ltd | Real estate | 2025 |
| NET Efficiency Employee Trustee Limited | Extraterritorial | 2015 |
| NET Efficiency Ltd | Information & communication | 2000 |
| Netgain Biodiversity Limited | Agriculture & fishing | 2022 |
| Netherlands Property Group Limited | Real estate | 2025 |
| Netherworld Medical Consulting Ltd | Professional & scientific | 2026 |
| Netizen Club Limited | Other services | 2019 |
| Netlaw Media Holdings Limited | Financial services | 2021 |
| Netlaw Media Limited | Other services | 2008 |
| Netrinsic Solutions Limited | Professional & scientific | 2021 |
| Nettleltd Ltd | Wholesale & retail | 2026 |
| Networking Essex Limited | Other services | 2024 |
| Networking Evolution Ltd | Other services | 2015 |
| Networkmaterials Limited | Information & communication | 2010 |
| Neuberg Management Ltd | Professional & scientific | 2019 |
| Neural Network Group Limited | Professional & scientific | 2025 |
| Neuroempower CIC | Education | 2022 |
| Neuroexpt Limited | Health & social care | 2022 |
| Neuroprecision Ltd | Professional & scientific | 2023 |
| Neurozen Limited | Information & communication | 2024 |
| Neutrino Retail Limited | Wholesale & retail | 2022 |
| Neva Ltd | Hospitality | 2025 |
| Never a Wasted Journey Ltd. | Administrative & support | 2013 |
| Never Ending Heights Ltd | Wholesale & retail | 2024 |
| Never-Ending Chain Ltd | Wholesale & retail | 2023 |
| Neviqa Ltd | Information & communication | 2025 |
| New 51A High Street Limited | Households | 2013 |
| New Again Ltd | Other services | 2012 |
| New Beginnings 16+ Limited | Health & social care | 2015 |
| New Beginnings Financial Services Limited | Administrative & support | 2019 |
| New Beginnings Land & Property Limited | Real estate | 2025 |
| New BIZ Limited | Administrative & support | 2000 |
| New Dukes Way (Chelmsford) Management Company Limited | Households | 1986 |
| New ERA Property Maintenance Limited | Construction | 2013 |
| New GEN Property Ltd | Construction | 2018 |
| New Generation Development Agency Ltd | Administrative & support | 2020 |
| New Hair & Beauty Lounge Ltd | Other services | 2019 |
| New Hall Multi Academy Trust | Education | 2013 |
| New Hall School Enterprises Limited | Education | 1998 |
| New Hall School Trust | Education | 2005 |
| New Home Assessments Limited | Professional & scientific | 2017 |
| New Homes Consultants Ltd | Professional & scientific | 2018 |
| New Homes Law Ltd | Professional & scientific | 2011 |
| New Homes Project Management Ltd. | Professional & scientific | 2020 |
| New Leaf Services Cleaning, Gardening and Maintenance Ltd | Administrative & support | 2019 |
| New London Road (Management Company) Limited | Households | 2005 |
| New Opportunities Projects Limited | Health & social care | 2023 |
| New Road (Properties) Limited | Construction | 1961 |
| New Royaal Air Travel and Tours Limited | Administrative & support | 2023 |
| New Tech Setup Limited | Information & communication | 2025 |
| New Viking Canal Boats Ltd | Manufacturing | 2014 |
| New Vision Digital Marketing Ltd | Professional & scientific | 2021 |
| New Vision Sales Ltd | Wholesale & retail | 2025 |
| New Wave Filtration Limited | Other services | 2002 |
| New Wave Recycling Ltd | Water & waste | 2024 |
| New York Car Company Limited | Extraterritorial | 2001 |
| Newbiologix SA Ltd | Other services | 2024 |
| Newell (Shoeburyness) Limited | Real estate | 2010 |
| Newell Commercial Assets Limited | Real estate | 2026 |
| Newell Commercial Properties Limited | Real estate | 1957 |
| Newell Group Holdings Limited | Financial services | 2025 |
| Newell Properties Developments Limited | Real estate | 2004 |
| Newell Residential Limited | Real estate | 2024 |
| Newest Trading Limited | Wholesale & retail | 2014 |
| Newheights Technologies Limited | Real estate | 2012 |
| Newlands South Limited | Wholesale & retail | 2019 |
| Newlead Limited | Construction | 2007 |
| Newlook DRY Cleaning & Laundry Ltd | Other services | 2022 |
| Newman Air Ltd | Construction | 2024 |
| Newmarket Crockery Hire Limited | Administrative & support | 2023 |
| Newms Landscape Gardening Services Limited | Administrative & support | 2012 |
| Newney Asset Management Ltd | Real estate | 2018 |
| Newtec London Ltd | Administrative & support | 2019 |
| Newton Hall Equitation Ltd | Agriculture & fishing | 2017 |
| Newton Plant Hire Limited | Administrative & support | 2020 |
| Newton Properties Limited | Real estate | 2024 |
| Nexa Smart Ltd | Construction | 2024 |
| Nexarion Systems Ltd | Information & communication | 2026 |
| Nexgen Decor Limited | Other services | 2018 |
| Nexlum Ltd | Wholesale & retail | 2025 |
| Nexplexity Limited | Information & communication | 2026 |
| Next AI Fusion Limited | Information & communication | 2025 |
| Next GEN Couriers Ltd | Transport & logistics | 2026 |
| Next GEN Tutors Ltd | Education | 2024 |
| Next Generation Elite Ltd | Information & communication | 2025 |
| Next Level Creations Ltd | Health & social care | 2015 |
| Next Phase Renovations Limited | Construction | 2024 |
| Next Steps Planning Limited | Professional & scientific | 2025 |
| Nextgen ERP Ltd | Information & communication | 2021 |
| Nextgen Land and Planning Limited | Professional & scientific | 2023 |
| Nextgen Property Services Limited | Real estate | 2022 |
| Nextmil Limited | Construction | 2017 |
| Nexus Business Solutions Ltd | Information & communication | 2012 |
| Nexus Management Solutions (UK) Ltd | Professional & scientific | 2024 |
| Nexus Systems Limited | Construction | 2019 |
| Nfam Mortgages Limited | Financial services | 2017 |
| NG Construction Team Ltd | Construction | 2005 |
| NHP Building and Refurbishment Ltd | Construction | 2021 |
| Nice MIX Ltd | Hospitality | 2025 |