| Namsos Boligutleie AS | Real estate | 2019 |
| Nano Tannteknikk AS | Manufacturing | 2009 |
| Nanoklinikken AS | Health & social care | 2023 |
| Nanolink Norge AS | Wholesale & retail | 2018 |
| Napa AS | Real estate | 2020 |
| Napoli AS | Hospitality | 1991 |
| Naprapat Kristin Haugland AS | Health & social care | 2022 |
| Nardo Bil AS | Other services | 1983 |
| Nardo Bil Eiendom AS | Real estate | 1995 |
| Nardo Bil Eiendom Kristiansund AS | Real estate | 2024 |
| Nardo Bil Eiendom Steinkjer AS | Real estate | 2021 |
| Nardo Bil Gruppen AS | Real estate | 2014 |
| Nardo Bil Holding AS | | 1997 |
| Nardo Blomster AS | Wholesale & retail | 2005 |
| Nardo Boligutleie AS | Real estate | 2020 |
| Nardo Centeret Ans | Real estate | 1989 |
| Nardo Frisørsenter AS | Other services | 1991 |
| Nardo Pizza Og Grill AS | Hospitality | 2014 |
| Nardo VVS AS | Construction | 2019 |
| Nardoskrenten 13, 71/185 AS | Real estate | 2018 |
| Nardosletta Legesenter Da | Health & social care | 2006 |
| Nardovegen 16B AS | Real estate | 2004 |
| Nardovegen 2 Og 5 AS | Real estate | 2025 |
| Nardovegen 23 AS | Real estate | 2019 |
| Nardoveien 10 AS | Real estate | 2007 |
| Nardoveien 16 AS | Real estate | 2016 |
| Narve Skårsmoen Holding AS | Professional & scientific | 2024 |
| Natmat AS | Professional & scientific | 2012 |
| Naturalish AS | Other services | 2026 |
| Naturfakta AS | Administrative & support | 2021 |
| Naturfoto.No AS | Professional & scientific | 2024 |
| Naturligvis Norge AS | Wholesale & retail | 2025 |
| Naudir AS | Wholesale & retail | 2021 |
| Nautilus Studio Da | Arts & recreation | 2008 |
| Navacut AS | Wholesale & retail | 2025 |
| Navigasjonslab AS | Health & social care | 2025 |
| Navitas 1 AS | Real estate | 2024 |
| Navn Holding AS | | 2026 |
| Naya Development AS | Professional & scientific | 2023 |
| NB Byggentreprenør AS | Construction | 1997 |
| NB Konstruksjon AS | Manufacturing | 2020 |
| NB29 Pro AS | Professional & scientific | 2016 |
| NCV Holdings AS | | 2024 |
| Ndesign AS | Professional & scientific | 2022 |
| NDT AS | Hospitality | 2021 |
| Nea & the Regulars Da | Arts & recreation | 2023 |
| Neandertal AS | Wholesale & retail | 2023 |
| Nebulosa AS | | 2026 |
| Nebunishvili Holding AS | | 2026 |
| Nectar the Brand AS | Professional & scientific | 2023 |
| Nedland Software AS | Information & communication | 2020 |
| Nedre Allè 12 B AS | Real estate | 2019 |
| Nedre Bakklandet 1 AS | Real estate | 2023 |
| Nedre Bakklandet 3 AS | Real estate | 2021 |
| Nedre Bakklandet 58 C AS | Real estate | 2005 |
| Nedre Bakklandet 75 AS | Real estate | 2013 |
| Nedre Bakklandet 77 AS | Real estate | 2007 |
| Nedre Bakklandet 8 AS | Real estate | 2017 |
| Nedre Grilstadkleiva 1-3 AS | Real estate | 2008 |
| Nedre Kalbakkvei 82 AS | Real estate | 2025 |
| Nedre Møllenberg Gate 13 AS | Real estate | 2021 |
| Nedre Møllenberg Gate 20 AS | Real estate | 2017 |
| Nedre Møllenberg Gate 43A AS | Real estate | 2005 |
| Nedre Møllenberg Gate 46 AS | Real estate | 1994 |
| Nedre Møllenberg Gate 55 AS | Real estate | 2024 |
| Nedre Møllenberg Gate 56 B AS | Real estate | 2017 |
| Nedre Møllenberg Gate 64 AS | Real estate | 2021 |
| Nedre Møllenberg Gate 65 a AS | Real estate | 2023 |
| Nedre Møllenberg Gate 68 a Og B AS | Real estate | 1993 |
| Nedre Møllenberg Gate 70 AS | Real estate | 2005 |
| Nedre Møllenberg Gate 89 AS | Real estate | 2026 |
| Nedre Møllenberg Gate 90 AS | Real estate | 2020 |
| Nedre Møllenberg Gate AS | Real estate | 2016 |
| Nedre Møllenberg GT 59 II AS | Real estate | 2019 |
| Nedre Møllenberggate 79 AS | Real estate | 2016 |
| Nedre Møllenberggt 53 AS | Real estate | 2025 |
| Nedre Møllenberggt 9 AS | Real estate | 2014 |
| Nedre Slottsgate 7 AS | Real estate | 2015 |
| Nedre Årnes 6 AS | Real estate | 2022 |
| Neemis AS | Hospitality | 2014 |
| Nef AS | Real estate | 2003 |
| Neive Holding AS | Financial services | 2012 |
| Nek Invest AS | | 2019 |
| Nelly AS | Hospitality | 2024 |
| Nemo Eiendom AS | Real estate | 2006 |
| Nemus Trondheim AS | Health & social care | 2016 |
| Nen AS | | 2023 |
| Neoframe AS | Professional & scientific | 2011 |
| Nepto AS | Information & communication | 2015 |
| Nepto Invest AS | | 2025 |
| Neptune Bidco AS | Agriculture & fishing | 2021 |
| Neptune Midco AS | Agriculture & fishing | 2021 |
| Neptune Topco AS | Agriculture & fishing | 2021 |
| Nerboe Invest AS | | 2025 |
| Nero Holding AS | Financial services | 2005 |
| Ness & Stranden Eiendom Da | Real estate | 2001 |
| Ness Motors AS | Wholesale & retail | 2006 |
| Nest Invest AS | Financial services | 2018 |
| Nestor Norge AS | Administrative & support | 2021 |
| Nesvik Consulting Invest AS | Real estate | 2013 |