| Moray Innovation AS | Professional & scientific | 2021 |
| Moray Offshore AS | Administrative & support | 2018 |
| Moray Rent AS | Administrative & support | 2023 |
| Moray Systems AS | Wholesale & retail | 2018 |
| Morbor Holding AS | | 2025 |
| Morcidea Apartments AS | Hospitality | 2018 |
| Morcidea AS | Hospitality | 2018 |
| More Holdco Apply AS | Mining & quarrying | 2016 |
| Moreld Aqua AS | Professional & scientific | 2020 |
| Moreld ASA | | 2021 |
| Moreld Group AS | Mining & quarrying | 2023 |
| Morene Produkter Gruppen AS | | 2024 |
| Morenehotellet AS | Real estate | 2012 |
| Morgenkaape AS | Wholesale & retail | 2023 |
| Morild Drift AS | Wholesale & retail | 2022 |
| Morioverse AS | Financial services | 2022 |
| Morten Hanssen AS | Wholesale & retail | 2006 |
| Mortensen Invest AS | Wholesale & retail | 2021 |
| Morzhakov Holding AS | | 2026 |
| Moseidsletta 112 AS | Real estate | 2017 |
| Moseidsletta 129 AS | Real estate | 2023 |
| Moseidveien 9 AS | Wholesale & retail | 2011 |
| Mosol Invest AS | | 2020 |
| Mosvangen Bygg AS | Construction | 2018 |
| Mosvangen Eiendom AS | Real estate | 2015 |
| Mota Holding AS | Financial services | 2015 |
| MOTIV8 Marketing AS | Professional & scientific | 2018 |
| Motive AS | Administrative & support | 1992 |
| Motorevents Norge AS | Administrative & support | 2021 |
| Motorlink AS | Wholesale & retail | 2025 |
| Motrum AS | Wholesale & retail | 2016 |
| Motrum Bilutleie AS | Administrative & support | 2017 |
| Motrum Bilverksted AS | Other services | 2021 |
| Mott Macdonald Ltd | Professional & scientific | 2007 |
| Motto Design AS | Information & communication | 2016 |
| Mouver AS | Professional & scientific | 2022 |
| Mouver Gruppen AS | Professional & scientific | 2024 |
| MOVE1 AS | Education | 2014 |
| Movere Invest AS | Financial services | 2016 |
| Moxey AS | Information & communication | 2016 |
| Moyo AS | Administrative & support | 2006 |
| Mpash AS | Real estate | 2023 |
| MR Bilsalg AS | Wholesale & retail | 2023 |
| MR Heart AS | Administrative & support | 2005 |
| MR Heart II AS | | 2025 |
| MR Heart III AS | | 2025 |
| MR Norman AS | Hospitality | 2015 |
| Mr-Holding AS | Administrative & support | 2025 |
| MR. Icecream AS | Wholesale & retail | 2025 |
| Mr.Slips Invest AS | Information & communication | 2015 |
| MRC Global Norway AS | Wholesale & retail | 2010 |
| MRC Stream AS | Wholesale & retail | 2013 |
| Mrjosang Holding AS | | 2025 |
| MRS AS | Manufacturing | 1987 |
| MRS Eiendom AS | Real estate | 2025 |
| MRS Investering AS | Manufacturing | 2005 |
| MS Psykologtjenester AS | Health & social care | 2015 |
| Mskm AS | | 2023 |
| MSL Holding AS | Real estate | 2007 |
| MST Amundsen AS | Transport & logistics | 2006 |
| MST Aurora AS | Transport & logistics | 2017 |
| MST Grand Banks AS | Transport & logistics | 2015 |
| MST Grand Banks Shipping AS | Administrative & support | 2014 |
| MST Norway Holdings AS | Administrative & support | 2002 |
| MST Norway Marine AS | Administrative & support | 2005 |
| MST Shuttle Loading AS | Transport & logistics | 2002 |
| MST Wave AS | Transport & logistics | 2018 |
| MST Wind AS | Transport & logistics | 2018 |
| MT Holding AS | Financial services | 2005 |
| MTM Capital AS | Real estate | 2017 |
| MTS Invest AS | | 2024 |
| Mucho Pesos AS | | 2021 |
| Mudita Care AS | Education | 2026 |
| Mudslide Da | Arts & recreation | 2021 |
| Muller AS | Construction | 2024 |
| Mulligan AS | | 2019 |
| Multidesign Engineering AS | Professional & scientific | 2021 |
| Multispar AS | Financial services | 2012 |
| Munaya Enterprises AS | Professional & scientific | 2017 |
| Mundalgeo AS | Professional & scientific | 2021 |
| Munequita AS | | 2020 |
| Munibee AS | Information & communication | 2025 |
| Munin Dynamics AS | Professional & scientific | 2026 |
| Munin Investering AS | | 2025 |
| Munken AS | Hospitality | 1987 |
| Munu AS | Information & communication | 2020 |
| Munu Holding AS | Information & communication | 2020 |
| Mur & Bygg AS | Wholesale & retail | 2006 |
| Murator Mur & Flis AS | Construction | 2017 |
| Murmester Gunnar Halvorsen AS | Construction | 2004 |
| Murphdog Holding AS | | 2017 |
| Murphy Pipelines Ltd Norsk Avdeling Av Utenlandsk Foretak Nuf | Construction | 2001 |
| Murrelektronik AS | Wholesale & retail | 1985 |
| Musegaten 18 AS | Real estate | 1981 |
| Musegatens Blomster AS | Wholesale & retail | 2017 |
| Museum Stavanger AS | Arts & recreation | 2010 |
| Music Mayhem Nuf | Arts & recreation | 2023 |
| Musikalsk Verksted AS | Arts & recreation | 2021 |
| Musikkbar Garman AS | Hospitality | 1993 |
| Musikkstuen AS | Hospitality | 2018 |