| Lektor Musums Gate 15 AS | Real estate | 2021 |
| Lektor Musums Gate 18 AS | Real estate | 2021 |
| Lenid AS | Real estate | 2012 |
| Lensevegen AS | Real estate | 2025 |
| Letnes Arkitektkontor AS | Professional & scientific | 1987 |
| Letnes Eiendom AS | Real estate | 1987 |
| Leve Utvikling AS | Real estate | 2016 |
| Lille New York AS | Hospitality | 2019 |
| Linq Prosjekt AS | Professional & scientific | 2020 |
| Livsmestring Med Rønnaug AS | Health & social care | 2022 |
| Loe Midt-Norsk Betong AS | Manufacturing | 1990 |
| Lolle Consulting AS | Professional & scientific | 2007 |
| LTS Eiendom AS | Real estate | 2005 |
| Lui Invest AS | Financial services | 2017 |
| Lundsaunet Da | Agriculture & fishing | 2022 |
| Lundsaunet Holding AS | Construction | 2025 |
| Lundsmo AS | Wholesale & retail | 2013 |
| Lunel AS | Construction | 2025 |
| LVB AS | | 2026 |
| Lydhagen AS | Arts & recreation | 2006 |
| Lykkero AS | Wholesale & retail | 2025 |
| Løst-In Holding AS | | 2024 |
| Løviks Penger AS | Information & communication | 2024 |
| Løvold Eiendom Og Utleie AS | Real estate | 2023 |
| M W Bolig AS | Construction | 2025 |
| M W Eiendom AS | Construction | 1998 |
| M W Holding AS | Real estate | 2012 |
| M Wik Holding AS | | 2025 |
| M.E. Invest AS | | 2023 |
| Maar AS | Administrative & support | 2005 |
| Madsen Eiendom AS | Real estate | 1989 |
| Magnolia Invest AS | Financial services | 2013 |
| Major Maskinlag Da | Agriculture & fishing | 2004 |
| Malermester Garberg & Garli AS | Construction | 2017 |
| Malermestran AS | Construction | 2003 |
| Mapela Eiendom AS | Real estate | 2021 |
| Maren Høgsnes AS | Wholesale & retail | 2016 |
| Maskin Og Motor AS | Other services | 2010 |
| Master Sealing AS | Construction | 2020 |
| Master Sealing Eiendom AS | Real estate | 2020 |
| Master Sealing Holding AS | Construction | 2020 |
| Master Sealing Sør AS | Construction | 2016 |
| Master Stillas AS | Construction | 2013 |
| Master Stillas Holding AS | Administrative & support | 2009 |
| May Selnes AS | Transport & logistics | 2024 |
| Med Hunden I Fokus AS | Education | 2025 |
| Media 24/7 AS | Professional & scientific | 2016 |
| Mediehuset Innherred AS | Information & communication | 2015 |
| Mei & Dei AS | Hospitality | 2014 |
| Meiden Regnskap AS | Professional & scientific | 2017 |
| Melakollen Barnehage SA | Education | 1994 |
| Melby Brødrene Ans | Agriculture & fishing | 1987 |
| Melby Maskin & Industriservice AS | Manufacturing | 2021 |
| Melby Prosjekt AS | Real estate | 2020 |
| Melby Slipeverksted AS | Manufacturing | 2025 |
| Menne AS | | 2026 |
| Mentvel AS | Health & social care | 2023 |
| Meritare AS | Professional & scientific | 2005 |
| Merkurvegen 10 AS | Real estate | 2023 |
| Merkurveien AS | Construction | 2015 |
| Merlin Eiendom AS | Real estate | 2008 |
| Merlin Kids AS | Wholesale & retail | 2000 |
| Mesterbygg Holding Verdal AS | Construction | 2005 |
| Mesterbygg Innherred AS | Construction | 1974 |
| Meta Car AS | Wholesale & retail | 2022 |
| Midt Eiendom AS | Administrative & support | 2022 |
| Midt Norsk Montering Ans | Construction | 1993 |
| Midt Norsk Stillas AS | Construction | 2001 |
| Midt Norsk Stillas Bemanning AS | Administrative & support | 2023 |
| Midt Teknisk AS | Administrative & support | 2019 |
| Midt Utvikling AS | Real estate | 2017 |
| Midt Økonomi AS | Professional & scientific | 2026 |
| Midt-Norsk Bor Og Betongsaging AS | Construction | 1998 |
| Midt-Norsk Bygg AS | Real estate | 2025 |
| Midt-Norsk Eiendom AS | Real estate | 1996 |
| Midt-Norsk Gym Da | Arts & recreation | 1989 |
| Midt-Norsk Kran AS | Administrative & support | 2017 |
| Midtnorsk Helikopterservice AS | Transport & logistics | 2006 |
| Mikael Wik AS | Construction | 2009 |
| Mikvold Invest AS | Financial services | 2009 |
| Minfysio AS | Health & social care | 2019 |
| Miniforetak AS | Professional & scientific | 2014 |
| Minsaas Plass 5 AS | Real estate | 2024 |
| Minsås Holding AS | Real estate | 2011 |
| MJS Bil AS | Wholesale & retail | 2026 |
| MK Betongbygg AS | Construction | 2005 |
| MK Entreprenør AS | Construction | 2025 |
| ML Holding Verdal AS | Wholesale & retail | 2014 |
| Moba's Lille Hobbykrok AS | Wholesale & retail | 2024 |
| Mobilt Industriverksted AS | Manufacturing | 2018 |
| Moma Eiendom AS | Real estate | 2022 |
| MOR10GO Invest AS | | 2024 |
| Mosvikstranda Panorama AS | Real estate | 2022 |
| Moxie Skjønnhet AS | Other services | 2019 |
| MP Gruppen AS | Real estate | 2001 |
| Mur Og Puss AS | Construction | 1985 |
| Museene Arven AS | Arts & recreation | 1989 |
| Musi Holding AS | | 2024 |
| Musum Byggservice AS | Construction | 2018 |
| Musum Byggservice AS | Construction | 2026 |