| KRIS1 Holding 2 AS | | 2019 |
| Krise AS | Health & social care | 2018 |
| Kryddo AS | Manufacturing | 1998 |
| Kråkholmvegen 24 AS | Real estate | 2025 |
| KTD Solution AS | Administrative & support | 2024 |
| Kurs & Kontrolltjenester AS | Professional & scientific | 2012 |
| Kvalitet & Ledelse AS | Professional & scientific | 1998 |
| Kvalitetstak AS | Construction | 2017 |
| Kvenild Eiendom AS | Real estate | 2005 |
| Kvenild Flata AS | Real estate | 2005 |
| Kvenildmyra 1 Nye AS | Real estate | 2021 |
| Kvenildmyra 8 AS | Real estate | 2025 |
| Kvenildmyra 9 AS | Manufacturing | 2006 |
| Kålvik Holding AS | | 2022 |
| Köhlers AS | Wholesale & retail | 2023 |
| L&L Solstudio AS | Other services | 2009 |
| Lagr AS | Real estate | 2023 |
| Lanaz Holding AS | Hospitality | 2023 |
| Landstad Holding AS | | 2025 |
| Langvassvegen Eiendom AS | Real estate | 2014 |
| Lars Moe Invest AS | | 2005 |
| Larsvika Holding AS | | 2022 |
| Leangenv 10 AS | Real estate | 2016 |
| Leangenveien 5 AS | Real estate | 2002 |
| Leirtun Holding AS | | 2024 |
| Lektorama AS | Education | 2025 |
| Lena Engtroe Holding AS | Hospitality | 2023 |
| Ler Eiendom AS | Real estate | 1997 |
| Lilleby & Mikkelsen Invest AS | Real estate | 2020 |
| Lina AS | Real estate | 1997 |
| Lina Canari AS | Real estate | 2018 |
| Lincoln Eiendom Holding AS | Real estate | 2023 |
| Lindbak Stormarkeder AS | Wholesale & retail | 2000 |
| Lindgjerdet Invest AS | Construction | 2021 |
| Lindmaack AS | Information & communication | 2023 |
| List Holding AS | | 2020 |
| Litra Nor AS | Transport & logistics | 2022 |
| LJ Boligservice AS | Professional & scientific | 2025 |
| Lohsen Handel AS | Administrative & support | 2023 |
| Loomian Entertainment AS | Information & communication | 2017 |
| LRC Råd & Regnskap AS | Professional & scientific | 2020 |
| Lucidum Studio AS | Information & communication | 2016 |
| Lund Og Rae Da | Information & communication | 1998 |
| Lundamo Auto AS | Wholesale & retail | 1991 |
| Lunta Brenner AS | | 2017 |
| Lurtek AS | Professional & scientific | 2010 |
| Lutdal Equity AS | Real estate | 2022 |
| LW Systems AS | Professional & scientific | 2026 |
| Lyd Og Telesystemer AS | Information & communication | 1997 |
| Læreboka Forlag AS | Information & communication | 2008 |
| Løft Bedriftsnettverk AS | Professional & scientific | 2016 |
| Løvåsmyra 6-3 AS | Real estate | 2013 |
| Madrian AS | | 2023 |
| Magic River Travels AS | Administrative & support | 2018 |
| Magne Gjervan AS | Wholesale & retail | 2005 |
| Mair AS | | 2021 |
| Maj-Holding AS | Construction | 2017 |
| Majoen AS | | 2023 |
| Maki Invest AS | | 2019 |
| Maku Invest AS | Real estate | 2008 |
| Malme Holding AS | | 2025 |
| Mancat AS | Professional & scientific | 2023 |
| Maske AS | Wholesale & retail | 1995 |
| Maske Bandagist AS | Wholesale & retail | 1995 |
| Maskegruppen AS | Wholesale & retail | 2014 |
| Maskin Og Utleie AS | Administrative & support | 2024 |
| Mats Nesset Holding AS | Administrative & support | 2020 |
| MC Tuning AS | Wholesale & retail | 2024 |
| MCH Invest AS | | 2015 |
| MCT Holding AS | Administrative & support | 2013 |
| Medisyd AS | Health & social care | 1997 |
| Melhus Elektro AS | Construction | 2022 |
| Melhus Elektro Varmepumper AS | Construction | 2021 |
| Memmis AS | Real estate | 2012 |
| Meredo AS | Professional & scientific | 1986 |
| Merkurvegen 12 AS | Real estate | 2019 |
| Merlin Kids Tiller AS | Wholesale & retail | 2019 |
| Mesterblikk AS | Construction | 1996 |
| Midt Norsk Regnskapsforum AS | Professional & scientific | 1985 |
| Midt-Norge Taxi AS | Transport & logistics | 2018 |
| Migdal IT AS | Information & communication | 2026 |
| Mimito Transport AS | Transport & logistics | 2021 |
| Mirjam & Mynouche Da | Information & communication | 2023 |
| Mirzai Invest AS | Professional & scientific | 2022 |
| Mittsør Holding AS | | 2021 |
| MMM Kapital AS | | 2022 |
| Moldsvor Invest AS | Financial services | 2006 |
| Moore Group AS | Real estate | 2014 |
| Moore Investment AS | Real estate | 2013 |
| Moore Partners AS | Administrative & support | 2008 |
| Moore Solutions AS | Real estate | 2007 |
| Morten Eide AS | Wholesale & retail | 2023 |
| Mosten Eiendom AS | Real estate | 2013 |
| Motor-Trade AS | Other services | 1998 |
| Motor-Trade Holding AS | Other services | 2013 |
| Mount Elf AS | Information & communication | 2017 |
| MS Natural Da | Wholesale & retail | 2012 |
| Murco AS | Construction | 1974 |
| Murtec AS | Construction | 2011 |
| Mymechanic AS | Other services | 2025 |