| Michael Eeg Invest AS | Real estate | 2012 |
| Michel Holding & Trade AS | Wholesale & retail | 2013 |
| Michel Invest AS | Professional & scientific | 1982 |
| Mico AS | Real estate | 2014 |
| Microvita AS | Real estate | 2020 |
| Midtown AS | Information & communication | 2017 |
| Miei AS | | 2017 |
| Mihr AS | Financial services | 2015 |
| Mikroentreprenørene Da | Construction | 2017 |
| Milele Journeys AS | Administrative & support | 2015 |
| Miljø Chemie AS | Administrative & support | 1992 |
| Miljøparken Gjenvinning AS | Real estate | 2003 |
| Miljøpeis AS | Wholesale & retail | 2009 |
| Millenium Holding AS | | 2024 |
| Millennia Holding AS | | 2005 |
| Milles Bunadstue AS | Manufacturing | 2026 |
| Mimergården AS | Real estate | 2007 |
| Minbod.No Lagerhotell AS | Real estate | 2005 |
| Mindo AS | Professional & scientific | 2017 |
| Mineralparken Eiendom AS | Real estate | 2015 |
| Mira Repstad AS | Mining & quarrying | 2004 |
| Mira Spa AS | Other services | 2018 |
| Mirador X AS | Professional & scientific | 2025 |
| Mirjam Frisør AS | Other services | 2024 |
| Mirjam Storm Design AS | Professional & scientific | 2022 |
| Miróh AS | Wholesale & retail | 2023 |
| Mitech Holding AS | Arts & recreation | 2016 |
| Mitin AS | Professional & scientific | 2019 |
| Mittet Electrical Engineering AS | Professional & scientific | 2012 |
| Mizuno Norge AS | Wholesale & retail | 2014 |
| Mj-Marine AS | Manufacturing | 2017 |
| Mj-Marine Mor AS | Manufacturing | 2018 |
| Mja Bilservice AS | Other services | 2007 |
| Mja Maler & Gulvbelegg AS | Construction | 1993 |
| Mjas AS | Professional & scientific | 2006 |
| MJH33 AS | Professional & scientific | 2025 |
| MJN14 AS | Real estate | 2022 |
| MJN24 AS | Real estate | 2022 |
| MJN3 AS | Real estate | 2022 |
| MJN4 AS | Real estate | 2022 |
| MJN40 AS | Real estate | 2024 |
| MJN41 AS | Real estate | 2024 |
| MJN43 AS | Real estate | 2024 |
| MJN45 AS | Real estate | 2024 |
| MJN46 AS | Real estate | 2024 |
| MJN47 AS | Real estate | 2024 |
| MJN6 AS | Real estate | 2022 |
| MJNJ44 AS | Real estate | 2024 |
| Mjo Sikkerhet AS | Administrative & support | 2024 |
| Mjåland Aviation Consulting, Mac AS | Professional & scientific | 2020 |
| Mjåland Industribygg AS | Real estate | 2005 |
| Mjåland Kiropraktikk Og Trening AS | Health & social care | 2021 |
| Mjåland Skog AS | Real estate | 2006 |
| Mjåvand AS | Real estate | 2016 |
| Mjåvand Lagerbygg AS | Real estate | 2022 |
| Mjåvann 13 D 1 AS | Wholesale & retail | 2013 |
| Mjåvann 13 D 4 AS | Real estate | 2013 |
| Mjåvann A1 AS | Real estate | 2009 |
| Mjåvann A2 AS | Real estate | 2009 |
| Mjåvann A3-1 AS | Real estate | 2008 |
| Mjåvann A3-3 AS | Real estate | 2011 |
| Mjåvann A3-4 AS | Real estate | 2011 |
| Mjåvann A3-5 AS | Real estate | 2011 |
| Mjåvann Dekksenter AS | Wholesale & retail | 2018 |
| Mjåvann Dekksenter Eiendom AS | Real estate | 2018 |
| Mjåvann Drift AS | Real estate | 2020 |
| Mjåvann Eiendom AS | Real estate | 2003 |
| Mjåvann Industriområde AS | Construction | 2007 |
| Mjåvann Industripark AS | Real estate | 2000 |
| Mjåvann Invest AS | Real estate | 2021 |
| Mjåvann Logistikk Park AS | Real estate | 2007 |
| Mjåvann Næringsbygg AS | Real estate | 2011 |
| Mjåvann Næringspark AS | Real estate | 2010 |
| Mjåvann Park AS | Real estate | 2024 |
| Mjåvannsparken Eiendom AS | Real estate | 1998 |
| Mjåvannsparken Eiendomsdrift AS | Real estate | 2013 |
| Mjåvannstomta AS | Real estate | 2004 |
| Mjåvannstoppen AS | Real estate | 2022 |
| Mjåvannsvegen 192 AS | Real estate | 2024 |
| Mjåvannsvegen 41 SNR 3 AS | Real estate | 2024 |
| Mjåvannsvegen 42 AS | Real estate | 2021 |
| Mjåvannsvegen 45 AS | Real estate | 2017 |
| Mjåvannsvegen 49/51 AS | Real estate | 2026 |
| Mjåvannsvegen 61 AS | Real estate | 1991 |
| Mjåvannsvegen 69 AS | Real estate | 2006 |
| Mjåvannsvegen 74 - Seksjon 5 AS | Real estate | 2022 |
| Mjåvannsvegen 74 - Seksjon 6 AS | Wholesale & retail | 2014 |
| Mjåvannsvegen 74 - Seksjon 7 AS | Wholesale & retail | 2014 |
| Mjåvannsvegen 8 AS | Real estate | 2018 |
| Mjåvannsveien 13 AS | Real estate | 2013 |
| Mjåvannsveien 15 AS | Real estate | 2016 |
| Mjåvannsveien 16 AS | Real estate | 2007 |
| Mjåvannsveien 170 AS | Real estate | 2012 |
| Mjåvannsveien 184 AS | Real estate | 2024 |
| Mjåvannsveien 23 AS | Real estate | 2017 |
| Mjåvannsveien 4 AS | Real estate | 2012 |
| Mjølner AS | Real estate | 1988 |
| MK Estetisk Hudklinikk AS | Wholesale & retail | 2023 |
| MK Finans AS | | 2020 |
| Mkd-Sør Invest AS | | 2025 |