| Murmester Fredrik Belsby AS | | 2022 |
| Murmester Goa AS | Construction | 2018 |
| Musikalkollektivet AS | Arts & recreation | 2016 |
| My Way International AS | Wholesale & retail | 1998 |
| Myhra Takst Og Byggteknikk AS | Real estate | 2026 |
| Myhre & Co Holding AS | | 2026 |
| Myhre Anlegg & Industri AS | Transport & logistics | 2010 |
| Myreneveien 6 Eiendom AS | Real estate | 2010 |
| Mysen Butikkeiendom AS | Real estate | 2010 |
| Møbelhuset Ringerike AS | Wholesale & retail | 2023 |
| Møbellageret Arnfinn H Bakke AS | Real estate | 1981 |
| Møbelsenteret Ringerike AS | Real estate | 1981 |
| Mørck Eiendom AS | Real estate | 2007 |
| Namsos Handelsbygg AS | Real estate | 2018 |
| Nana Eiendom AS | Real estate | 2013 |
| Nana Eiendom Da | Real estate | 2006 |
| Nannestad Butikkeiendom AS | Real estate | 2011 |
| Navi AS | Wholesale & retail | 2006 |
| Nedenes Butikkeiendom AS | Real estate | 2008 |
| Nedre Alme AS | Real estate | 2005 |
| Nedre Auren Gårdsbarnehage AS | Education | 2015 |
| Nedre Kimmerud Ans | Agriculture & fishing | 1995 |
| Neleus Holding AS | | 2022 |
| Neonparty AS | Arts & recreation | 2024 |
| Nerstad AS | Transport & logistics | 2020 |
| Nerstad Tuft Transport AS | Transport & logistics | 1996 |
| Nesodden Butikkeiendom AS | Real estate | 2007 |
| Netn AS | Information & communication | 2026 |
| Nettfrakt AS | Transport & logistics | 2008 |
| New York Pizza AS | Hospitality | 2014 |
| Newco Inv AS | | 2026 |
| Nextgen Resonanse Labs AS | Professional & scientific | 2009 |
| NHD AS | Professional & scientific | 2013 |
| Niba Invest AS | | 2021 |
| Niboa AS | | 2016 |
| Nifo AS | Wholesale & retail | 2005 |
| Nitar AS | Professional & scientific | 2017 |
| Nittedal Butikkeiendom AS | Real estate | 2004 |
| NK Regnskap AS | Professional & scientific | 2026 |
| NK Økonomi Bistand AS | Professional & scientific | 2019 |
| NL Arkitektur AS | Professional & scientific | 2023 |
| Nla 4850 AS | Real estate | 2022 |
| No Problem Ans | Hospitality | 1995 |
| Nochedelunahair AS | Wholesale & retail | 2026 |
| Nohregården Da | Real estate | 2005 |
| Noko-Filmcasting & Filmproduksjon Da | Information & communication | 2006 |
| Nomade AS | Wholesale & retail | 2009 |
| Nonfoodgroup AS | Wholesale & retail | 2024 |
| Nor IT AS | Information & communication | 2019 |
| Nordbil AS | Wholesale & retail | 2023 |
| Nordeko AS | Construction | 2018 |
| Nordeko Eiendom AS | Real estate | 2018 |
| Nordeko Holding AS | Construction | 2018 |
| Nordeng Bil AS | Wholesale & retail | 2023 |
| Nordeng Telekompetanse AS | Construction | 2024 |
| Norderhov Utmarkslag SA | Real estate | 2016 |
| Norderhov Vanning Samvirkeforetak | Water & waste | 1979 |
| Norderhovsgaten 19 AS | Real estate | 2010 |
| Nordic Aviation Camo & Consulting AS | Professional & scientific | 2025 |
| Nordic Bloom AS | Agriculture & fishing | 2024 |
| Nordic Data Resources AS | Information & communication | 2015 |
| Nordic Maintenance and Production AS | Manufacturing | 2008 |
| Nordic Malerservice AS | Construction | 2013 |
| Nordisk Dugnad AS | Wholesale & retail | 2023 |
| Nordisk Sertifisering AS | Professional & scientific | 2017 |
| Nordre Torv 4 Da | Real estate | 2001 |
| Nordre Torv 5 AS | Real estate | 2007 |
| Nordry AS | Energy | 2021 |
| Nordsiden Renseri AS | Other services | 2009 |
| Norefjell AS | Real estate | 2022 |
| Norenergi AS | Real estate | 1986 |
| Norenergi Eiendom AS | Real estate | 2022 |
| Noresund Bolig AS | Real estate | 2023 |
| Noresund Fjordutsikt AS | Real estate | 2021 |
| Norge Tre AS | Wholesale & retail | 1989 |
| Norm AS | Real estate | 2007 |
| Norm Eiendom AS | Real estate | 2025 |
| Norsen AS | Wholesale & retail | 2024 |
| Norsk Betong Ans | Manufacturing | 1988 |
| Norsk Exchange AS | Wholesale & retail | 2025 |
| Norsk Flid Husfliden Hønefoss AS | Wholesale & retail | 1985 |
| Norsk Kapitalplassering AS | Construction | 1989 |
| Norsk Natur AS | Wholesale & retail | 2020 |
| Norsk Titanium Equipment AS | Wholesale & retail | 2015 |
| Norske Servicesystemer AS | Wholesale & retail | 1994 |
| Norstrøm & Thingelstad Da | Real estate | 2003 |
| Nortek Solution AS | Construction | 2022 |
| Northern Green Hydro AS | Information & communication | 2022 |
| Northern Project Records Ans | Information & communication | 2021 |
| Norwegian Aero Solutions AS | Manufacturing | 2024 |
| Norwegian Landcamper AS | Administrative & support | 2019 |
| Norwegian Trade AS | Wholesale & retail | 2014 |
| Norwegian Vibes AS | Wholesale & retail | 2016 |
| Norwood AS | Wholesale & retail | 1978 |
| Notodden Handelsbygg AS | Real estate | 2011 |
| Nourr AS | Wholesale & retail | 2019 |
| Nowe AS | Professional & scientific | 2017 |
| NPL AS | | 2025 |
| NR Sawkins Holding AS | | 2025 |
| NRT Holding AS | | 2026 |