| MFB Eiendom AS | Real estate | 2022 |
| MG Varehus AS | Wholesale & retail | 2018 |
| Mi Multiservice AS | Transport & logistics | 2023 |
| Mia Holm Holding AS | | 2024 |
| Michknut AS | | 2022 |
| Midaz Holding AS | Real estate | 2024 |
| Midgard Harstad AS | Hospitality | 2022 |
| Midt-Troms AS | Real estate | 2000 |
| Mikal Multiservice AS | Construction | 2026 |
| Minas Eiendom AS | Real estate | 2023 |
| Mini Utleie Da | Administrative & support | 2007 |
| Minitek AS | Administrative & support | 2015 |
| Mino Eiendom AS | Real estate | 2011 |
| Mino Invest AS | Real estate | 2001 |
| MK Invest AS | Financial services | 2013 |
| MK Liqvi AS | Information & communication | 2015 |
| MMG Holding AS | Real estate | 2018 |
| MMG Regnskap AS | Professional & scientific | 2024 |
| MMS Eiendom AS | Real estate | 2021 |
| MNJ AS | | 2020 |
| Mnrx AS | Arts & recreation | 2023 |
| Mo I Rana AS | Real estate | 2012 |
| Moddy AS | Education | 2015 |
| Moh Holding AS | | 2024 |
| Molaria AS | Health & social care | 2015 |
| Momentum Coaching AS | Education | 2026 |
| Monica Haukebøe Balswick Holding AS | | 2025 |
| Morten Killi AS | Construction | 2020 |
| Morten Killi Eiendom AS | Real estate | 2021 |
| Morten Mangersnes AS | Health & social care | 2015 |
| Moruto AS | Real estate | 2018 |
| Mot Nord AS | Professional & scientific | 2006 |
| Mot Sør AS | Professional & scientific | 2015 |
| Motion Nord AS | Other services | 2026 |
| Moto Invest AS | Wholesale & retail | 2024 |
| Motorhuset AS | Real estate | 1986 |
| Mpro AS | Professional & scientific | 2025 |
| MSR Consult AS | Professional & scientific | 2018 |
| MT Consulting AS | Professional & scientific | 2022 |
| MT Eiendom Utvikling AS | Real estate | 2022 |
| MT Holdings AS | Professional & scientific | 2022 |
| Multi-Nord Ans | Professional & scientific | 1988 |
| Multiservice Nord AS | Construction | 2014 |
| Munkvold Holding AS | Financial services | 2011 |
| Murbygg AS | Construction | 1975 |
| Murer Terje Schjelderup AS | Construction | 2012 |
| Murmester Endre Bornø AS | Construction | 2025 |
| Muskan Skjønnhetsstudio AS | Other services | 2024 |
| MVD Eiendom AS | Hospitality | 2022 |
| MVD Holding AS | Construction | 2020 |
| Mercur Diesel A/S | Real estate | 1988 |
| Mølnholtet Familiebarnehage Nuf | Education | 2011 |
| Mørkvedveien 98 Bodø AS | Real estate | 2016 |
| Namdal Skogpleie AS | Agriculture & fishing | 2022 |
| Naprapat Frøydis Akseline Solvang AS | Health & social care | 2012 |
| Nathanielsen Begravelsesbyrå AS | Other services | 2006 |
| Nathanielsen Binderi AS | Wholesale & retail | 2021 |
| Nathanielsen Blomster AS | Wholesale & retail | 1996 |
| Nathanielsen Eiendom AS | Real estate | 2001 |
| Nato Holding AS | Real estate | 2021 |
| Natt AS | | 2025 |
| Naturalbliss AS | Real estate | 2023 |
| Nazar Invest AS | Wholesale & retail | 2020 |
| NBH Holding AS | Information & communication | 2024 |
| Nbi Holding AS | | 2015 |
| Nedre Holte AS | Real estate | 2003 |
| Nemus Harstad AS | Health & social care | 2022 |
| Nes Utvikling AS | Real estate | 2005 |
| Ness & Lind AS | Wholesale & retail | 1957 |
| Nesshågan Eiendom AS | Administrative & support | 2015 |
| Nesslund AS | Real estate | 2013 |
| Nestory AS | Professional & scientific | 2026 |
| NG Tre AS | Real estate | 2024 |
| Nicoline Pedersen AS | Health & social care | 2026 |
| Nilham Holding AS | | 2024 |
| Nilsen Utleie AS | Real estate | 2024 |
| Nilssen Holding AS | | 2005 |
| Nitwit Holding AS | | 2024 |
| Njalla AS | | 2019 |
| Njål Killi AS | Real estate | 2015 |
| Nk.Bygg AS | Construction | 2026 |
| NKJ Invest AS | | 2012 |
| NL Harstad AS | Hospitality | 2015 |
| NMT Bygg&Eiendom AS | | 2017 |
| NMT Nordmark Maskin & Transport AS | Construction | 1988 |
| No Eiendom AS | Real estate | 2021 |
| Nor Bilglass AS | Other services | 2020 |
| Noranett AS | Energy | 2003 |
| Norbase Logistikk AS | Transport & logistics | 2014 |
| Norbil AS | Other services | 2015 |
| Norcon AS | Professional & scientific | 2001 |
| Nord Gravering Ans | Manufacturing | 1990 |
| Nord Milano AS | Hospitality | 2015 |
| Nordafor Revisjon AS | Professional & scientific | 2025 |
| Nordic Adventures AS | Administrative & support | 2023 |
| Nordic Bilservice AS | Other services | 2022 |
| Nordic Bilutleie AS | Wholesale & retail | 2022 |
| Nordic Consulting & Services AS | Professional & scientific | 2026 |
| Nordic Investment AS | Real estate | 1952 |
| Nordic Light Yachting AS | Administrative & support | 2023 |