| Maricon AS | Financial services | 2005 |
| Marin AS | Real estate | 2004 |
| Marin Eide AS | Real estate | 2009 |
| Marin Eiendomsutvikling AS | Real estate | 1996 |
| Marinehallen AS | Arts & recreation | 2021 |
| Maritim Utleige AS | Administrative & support | 2024 |
| Maritime Construction Solutions AS | Manufacturing | 2007 |
| Marits Blomster Da | Wholesale & retail | 1988 |
| Match Bemanning Norge AS | Administrative & support | 2020 |
| Mayvika Holding AS | | 2026 |
| MBA28 AS | Real estate | 2021 |
| MC Bygg AS | Construction | 2025 |
| MCS Holding AS | | 2026 |
| MCS Maskinering AS | Professional & scientific | 2005 |
| Mde Bergen AS | Administrative & support | 2020 |
| Mekanikk Eiendom AS | Manufacturing | 2009 |
| Merian AS | Professional & scientific | 2014 |
| Mesopelagia AS | Agriculture & fishing | 2025 |
| Metalldel.No AS | Manufacturing | 2025 |
| Michael Krohnsgte 40 AS | Real estate | 2025 |
| Mimax Betongsaging AS | Construction | 2024 |
| Mimax Holding AS | | 2022 |
| Mizu AS | | 2023 |
| Mjelstad Holding AS | Hospitality | 2006 |
| Mknudsen AS | Education | 2023 |
| MN Presisjon AS | Wholesale & retail | 2026 |
| Modulvegger Bergen AS | Construction | 2012 |
| Mohn Drilling AS | Mining & quarrying | 1985 |
| Mohn Technology AS | Professional & scientific | 1997 |
| Mona Holding AS | Education | 2005 |
| Monrad Mjeldes Vei Huseierlag | Real estate | 2002 |
| Morten Moldestad AS | Wholesale & retail | 1993 |
| Morvik Montasje AS | Construction | 2026 |
| Mosj Holding AS | Information & communication | 2021 |
| Mount Visual AS | Professional & scientific | 2014 |
| MRS Miccio AS | Manufacturing | 2025 |
| Muliza Holding AS | Real estate | 2013 |
| Multi Reklame AS | Manufacturing | 1988 |
| Multi Reklame Drift AS | Professional & scientific | 2026 |
| Multicraft AS | Construction | 2017 |
| Multicraft Bygg AS | Construction | 2020 |
| Multigjerde AS | Construction | 2006 |
| Munckgrab AS | Manufacturing | 1995 |
| Munckgrab Services AS | Manufacturing | 2014 |
| Murmestrene Knudsen & Olsen AS | Construction | 2011 |
| Mutnos Holding AS | Wholesale & retail | 2023 |
| My Dream AS | Wholesale & retail | 2017 |
| Mycloop AS | Manufacturing | 2026 |
| Møllerstrøm Holding & Invest AS | Real estate | 2012 |
| Møyfrid Tysdal AS | Wholesale & retail | 1995 |
| N&K Eiendom AS | Real estate | 2011 |
| N&K Holding AS | Real estate | 2011 |
| N. Holding AS | Financial services | 2012 |
| Nagelld AS | Information & communication | 2011 |
| Naka Take Away AS | Hospitality | 2020 |
| Nansen Yachts AS | Manufacturing | 2015 |
| Nepstad Holding AS | | 2022 |
| Nerox Holding AS | | 2024 |
| Nett Konsept Ans | Information & communication | 2000 |
| Neumanns Gate 7 AS | Hospitality | 2012 |
| Neverdal Holding AS | Administrative & support | 2004 |
| Ni. Nor AS | Administrative & support | 2012 |
| Norclean Technology AS | Professional & scientific | 2007 |
| Nordic Lux Explore AS | Agriculture & fishing | 2025 |
| Nordic Numbers AS | Information & communication | 2023 |
| Nordic Supply Partner AS | Wholesale & retail | 1994 |
| Nordic Textile Group AS | Wholesale & retail | 2015 |
| Nordic VVS AS | Construction | 2026 |
| Nordicore AS | Professional & scientific | 2024 |
| Nordkapp Boats Ans | Wholesale & retail | 2020 |
| Nordline Bygg AS | Construction | 2026 |
| Nordnesgaten 20 AS | Real estate | 1980 |
| Nordspec AS | Construction | 2026 |
| Norevent AS | Arts & recreation | 2025 |
| Norheim Service Partner AS | Construction | 2011 |
| Norsk Medisinsk Termografi AS | Education | 1989 |
| Norsk Ventilasjon AS | Construction | 1991 |
| Norsub AS | Professional & scientific | 2021 |
| North of Ordinary AS | Hospitality | 2026 |
| North Sea Electronics AS | Professional & scientific | 2005 |
| North Sea Handling AS | Professional & scientific | 2017 |
| Northern Law Advokatfirma AS | Professional & scientific | 2023 |
| Norvita Med AS | Wholesale & retail | 2024 |
| Norwegian Energy Production AS | Manufacturing | 2019 |
| Norwegian Travel Concierge AS | Administrative & support | 2025 |
| Noxcess AS | Administrative & support | 2026 |
| Nse Defence AS | Professional & scientific | 2025 |
| NSH Ships Equipment AS | Professional & scientific | 2016 |
| NSH Solutions AS | Professional & scientific | 2017 |
| Nui AS | Professional & scientific | 2013 |
| Nuru Beauty AS | Wholesale & retail | 2025 |
| Nygård Blomster Center AS | Wholesale & retail | 2009 |
| Nystuveien 11 AS | Real estate | 2021 |
| Nytt Bad Bergen AS | Construction | 2022 |
| Nytt Liv Studio Da | Other services | 2025 |
| O Nilsson Holding AS | | 2024 |
| Ocean Resources AS | Administrative & support | 2012 |
| Oceanic Seismic Vessels AS | Administrative & support | 2007 |
| Ocomp AS | Education | 2001 |
| Ode Da | Information & communication | 2016 |