| Naparatus Ltd | Public administration | 2022 |
| Naqvi Surgical Limited | Health & social care | 2018 |
| NAR Radiology Ltd | Health & social care | 2020 |
| Nar-Dent Ltd | Other services | 2023 |
| Nargile (Aberdeen) Limited | Hospitality | 2004 |
| Nargile Edinburgh Limited | Hospitality | 2010 |
| Nargit Ltd | Information & communication | 2019 |
| Narrative Logic Ltd | Information & communication | 2025 |
| Narrativium Ltd | Information & communication | 2020 |
| Narusevics Ltd | Construction | 2018 |
| Nasaji Limited | Health & social care | 2022 |
| Nashcomm Ltd | Information & communication | 2018 |
| Naspira Solutions Ltd | Professional & scientific | 2015 |
| NAT Creative Ltd | Arts & recreation | 2022 |
| Natalie Tough School of Dance Limited | Administrative & support | 2022 |
| Natca Global Ltd | Information & communication | 2024 |
| Nathan Hems T/A Tgfs Ltd | Wholesale & retail | 2025 |
| Nathan Hotel Limited | Hospitality | 2025 |
| National Press Corporation Limited | Information & communication | 2025 |
| Native Alien Software Ltd | Information & communication | 2018 |
| Native Barbers and Designs Ltd | Other services | 2025 |
| Natural Earth Soaps Ltd | Manufacturing | 2026 |
| Natural Research (Projects) Limited | Professional & scientific | 2000 |
| Natural Research Limited | Professional & scientific | 2000 |
| Natural Resource Environmental Solutions Ltd | Professional & scientific | 2014 |
| Naturalle.... Ltd | Wholesale & retail | 2025 |
| Nature’S Way Herbal Remedies Ltd | Wholesale & retail | 2023 |
| Nautilus Rigging (UK) Ltd. | Manufacturing | 2007 |
| Navatech Ltd | Professional & scientific | 2014 |
| Navi Systems Ltd | Wholesale & retail | 2026 |
| Navigator Europe Limited | Administrative & support | 2012 |
| Nawab Driving School Ltd | Education | 2019 |
| Nawab Property Solutions Limited | Real estate | 2023 |
| NBL Linton Limited | Real estate | 2015 |
| NC (Scotland) Limited | Agriculture & fishing | 2017 |
| NCA Management Ltd | Real estate | 2024 |
| NCG Mortgage Services Ltd | Financial services | 2017 |
| Ncimb Limited | Professional & scientific | 1982 |
| NCL Consultant SEE Limited | Administrative & support | 2010 |
| NCN Retail Ltd | Wholesale & retail | 2020 |
| NCP Projects Limited | Construction | 2021 |
| ND Modelling Limited | Professional & scientific | 2017 |
| Nddsrkp Limited | Real estate | 2019 |
| NDL Consulting Ltd | Professional & scientific | 2024 |
| Ndlm Services Limited | Other services | 2019 |
| NDT Services KJD Limited | Mining & quarrying | 2019 |
| NDT Tech Solutions U.K. Limited | Transport & logistics | 2025 |
| Ndtech Services Limited | Professional & scientific | 2025 |
| NE Blend Ltd | Hospitality | 2023 |
| NE Geotech Limited | Administrative & support | 2001 |
| Neapolis Inter LP | | 2013 |
| Near Future Technologies Ltd | Information & communication | 2015 |
| Near Orient Ltd | Professional & scientific | 2010 |
| Nebulae Solutions Ltd. | Financial services | 2015 |
| Nedepin Ltd | Information & communication | 2024 |
| Nederland NET LP | | 2014 |
| NEE Corp Ltd | Professional & scientific | 2013 |
| Neeya Accounting Limited | Professional & scientific | 2026 |
| Nefertiti Technical Limited | Professional & scientific | 2003 |
| Neil Buchan Ltd | Professional & scientific | 2019 |
| Neil Carr Ltd | Professional & scientific | 2025 |
| Neil Dicks Engineering Consultancy Ltd | Professional & scientific | 2024 |
| Neil Donald Associates Ltd | Professional & scientific | 2023 |
| Neil Physio Limited | Health & social care | 2017 |
| Nekm Limited | Financial services | 2018 |
| Nelles Afri Hub Limited | Wholesale & retail | 2025 |
| Nelson Commerce Ltd | Wholesale & retail | 2025 |
| Nelys Limited | Wholesale & retail | 2016 |
| Nemar Limited | Professional & scientific | 2013 |
| Nemdirkam Chemical Consulting Ltd | Professional & scientific | 2019 |
| Nemesis Kickboxing Academy Ltd | Education | 2022 |
| Nemossos Limited | Professional & scientific | 2013 |
| Nemzblendz Limited | Hospitality | 2023 |
| Nene's Kitchen and Events Ltd | Manufacturing | 2026 |
| NEO Next + Energy Limited | Financial services | 2014 |
| NEO Next+ Energy (CNS) Limited | Administrative & support | 2006 |
| NEO Next+ Energy (Exploration) Limited | Administrative & support | 2005 |
| NEO Next+ Energy (SNS) Limited | Mining & quarrying | 2005 |
| NEO Next+ Energy Consolidated Holdings Limited | Mining & quarrying | 2023 |
| NEO Next+ Energy Upstream UK Limited | Mining & quarrying | 2005 |
| Neon Laundry Commercial Services Ltd | Other services | 2025 |
| Neppmethod Ltd | Education | 2020 |
| Neptune Street Films Ltd. | Other services | 2018 |
| Neptune Subsea Engineering Ltd | Mining & quarrying | 2002 |
| Neriah Identity Apparel Ltd | Manufacturing | 2026 |
| Nero Trast LP | | 2013 |
| NES Fast Foods Ltd. | Other services | 2018 |
| Nescan Hub Limited | Other services | 2021 |
| Nessgro Limited | Agriculture & fishing | 2004 |
| Nest Key Ltd | Real estate | 2023 |
| Nestaglen Limited | Real estate | 1995 |
| Nestle James & Company Ltd | Wholesale & retail | 2018 |
| NET Zero Solution Centre Limited | Professional & scientific | 2020 |
| NET Zero Technology Advisory Limited | Professional & scientific | 2021 |
| NET Zero Technology Centre Group Limited | Professional & scientific | 2024 |
| NET Zero Technology Centre Limited | Administrative & support | 2016 |
| NET Zero Technology Investments Limited | Professional & scientific | 2021 |
| NET Zero Technology Services Limited | Professional & scientific | 2022 |
| NET Zero Technology Solutions Limited | Professional & scientific | 2021 |
| NET Zero@Sea Limited | Agriculture & fishing | 2021 |