| Koppang AS | Professional & scientific | 2021 |
| Kot AS | Real estate | 2020 |
| Krag Engen Invest AS | | 2026 |
| Krepsen Og Væren AS | Professional & scientific | 1981 |
| Kriben AS | | 2025 |
| Krundalen Holding AS | | 2019 |
| Krydderfabrikken AS | Wholesale & retail | 2026 |
| KSTI1 Holding AS | | 2020 |
| Kuno AS | Wholesale & retail | 2024 |
| Kvadsheim Consulting AS | Professional & scientific | 2024 |
| Kvalen Capital AS | Real estate | 2021 |
| L&L Rådgivning AS | Health & social care | 2011 |
| L16 Seksjon 10 AS | Real estate | 2025 |
| Lalyc Technologies AS | Wholesale & retail | 2024 |
| Lamco AS | Information & communication | 2023 |
| Langfeldt Wessel Arkitekter AS | Professional & scientific | 2013 |
| Langfjord Invest AS | | 2022 |
| Laws AS | | 2026 |
| Layup AS | Real estate | 2012 |
| Lembach 58 AS | Real estate | 2014 |
| Lembach 94 AS | Real estate | 2014 |
| Lembach 97 AS | Real estate | 2014 |
| Lembach Eiendom AS | Real estate | 1991 |
| Lembach Holding AS | Real estate | 1991 |
| Lembach Vestlia AS | Real estate | 2022 |
| Lemma AS | Information & communication | 2023 |
| LFG Invest AS | | 2021 |
| Lhsa Invest AS | | 2020 |
| Life Science Strategics AS | Professional & scientific | 2011 |
| Lifi Invest AS | Administrative & support | 2011 |
| Living High Da | Manufacturing | 2007 |
| LK Capital AS | Real estate | 2017 |
| Loftet Musikk AS | Wholesale & retail | 2025 |
| Log Invest AS | Financial services | 2011 |
| Lonar Programsystemer AS | Information & communication | 2009 |
| Longshire AS | Information & communication | 2017 |
| Loveshack Ans | Arts & recreation | 2006 |
| Ltcm Holding AS | | 2023 |
| Lucidia AS | Information & communication | 2023 |
| Lumeon AS | Information & communication | 2012 |
| Lundin AS | Financial services | 2005 |
| Lunor AS | Real estate | 1999 |
| Løft Holding AS | | 2024 |
| Løkeberg Eiendom AS | Real estate | 1980 |
| Løkeberg Pizza AS | Manufacturing | 2018 |
| M Halvorsen AS | Wholesale & retail | 1925 |
| Mabiro AS | Professional & scientific | 2015 |
| Maler Uten Grenser AS | Construction | 2015 |
| Manao AS | Wholesale & retail | 2013 |
| Maq Capital AS | Professional & scientific | 2021 |
| Maq Invest AS | Professional & scientific | 2016 |
| Martanello C AS | Professional & scientific | 2013 |
| Martmik Invest AS | | 2026 |
| Matfabrikken AS | Hospitality | 2017 |
| Matre-Nilsen Holding AS | | 2022 |
| Matvic Invest AS | | 2012 |
| Mcintosh AS | | 2022 |
| Mediaa Consulting AS | Professional & scientific | 2020 |
| Mediateck AS | Professional & scientific | 2021 |
| Meisingset Eiendomsselskap AS | Real estate | 1964 |
| Merci Merch AS | Information & communication | 2023 |
| Merik AS | Professional & scientific | 2020 |
| Mesiro AS | Information & communication | 2020 |
| Metapol AS | Professional & scientific | 2024 |
| Meus AS | | 2024 |
| MFG Invest AS | | 2024 |
| MG Capital AS | Information & communication | 2022 |
| Midgardveien 16 Utvikling AS | Real estate | 2021 |
| Millennials AS | Wholesale & retail | 2018 |
| Mistral Consult AS | Professional & scientific | 2013 |
| MJ Investment AS | | 2026 |
| Mjala AS | | 2022 |
| MJJ Capital AS | Health & social care | 2023 |
| MK Holding AS | | 2024 |
| ML Bygg Ans | Construction | 2010 |
| Moat Holding AS | Information & communication | 2017 |
| Mobiliti AS | Professional & scientific | 2025 |
| Momrak & Gøystdal Da | Agriculture & fishing | 1995 |
| Morris Holding AS | | 2020 |
| Mosholding AS | Wholesale & retail | 2024 |
| MRT AS | Professional & scientific | 2006 |
| Mterms AS | Professional & scientific | 2020 |
| Muchachita AS | | 2020 |
| Muchachito AS | | 2020 |
| Multibi AS | Professional & scientific | 2018 |
| Muskaran AS | Hospitality | 2023 |
| Musker Fysioterapi AS | Health & social care | 2024 |
| Mutars Holding AS | | 2023 |
| Myklestad Holding AS | | 1989 |
| Myliorum AS | | 2018 |
| Myrsnipa Fus Barnehage AS | Education | 2019 |
| Nagasari AS | Professional & scientific | 2015 |
| Nameless Cloud AS | Information & communication | 2023 |
| Nash Invest AS | | 2021 |
| Nedu - Norway Education and Culture Consulting Da | Administrative & support | 2003 |
| Ness Business AS | | 2022 |
| Nesveien 19 AS | Real estate | 2019 |
| Neuroth Racing AS | Agriculture & fishing | 2020 |
| Nevro AS | Health & social care | 2019 |
| Nico Drilling AS | Mining & quarrying | 2018 |