| Lund Forvaltning AS | Real estate | 2006 |
| Lund-Holding AS | | 2022 |
| Lunde & Lunde Da | Professional & scientific | 2025 |
| Lundeberg Malerservice AS | Construction | 2022 |
| Lundemo Eiendom AS | Real estate | 2003 |
| Lundis Holding AS | | 2023 |
| Lunera Energi AS | Energy | 1998 |
| Lunheim Utbyggingsselskap AS | Real estate | 2009 |
| Lupin Form AS | Professional & scientific | 2007 |
| Lura Bolig AS | Real estate | 2016 |
| Lurabyen Eiendom AS | Real estate | 1996 |
| Lurahøyden Bolig AS | Real estate | 2019 |
| Lurvik Retail AS | Wholesale & retail | 2022 |
| Lusi Holding AS | | 2018 |
| Lusparken Arkitekter AS | Professional & scientific | 1995 |
| Lusparken Vaskeri AS | Health & social care | 2008 |
| Lux Opus AS | Professional & scientific | 2019 |
| Luxsave AS | Information & communication | 2010 |
| LWM Produksjon AS | Arts & recreation | 2023 |
| Lybe Scientific AS | Professional & scientific | 2021 |
| Lyckliga Gatan AS | Real estate | 2017 |
| Lydo AS | Arts & recreation | 2024 |
| Lydsporet Media AS | Information & communication | 2017 |
| Lykke Angen Holding AS | | 2017 |
| Lykke Hjemme AS | Administrative & support | 2020 |
| Lykke-Li AS | Administrative & support | 2026 |
| Lykkeborgen AS | Real estate | 2005 |
| Lyks Da | Wholesale & retail | 2023 |
| Lykstadveien SA | Real estate | 1970 |
| Lykt AS | Information & communication | 2015 |
| Lynga Sanddyn AS | | 2025 |
| Lyngaas TMC AS | Professional & scientific | 2013 |
| Lyngbråten AS | | 2007 |
| Lyngko AS | Professional & scientific | 2021 |
| Lyngrabben Holding AS | | 2018 |
| Lyngset AS | Agriculture & fishing | 2026 |
| Lyrgu AS | Information & communication | 2026 |
| Lysholm AS | | 2025 |
| Lysholm Bil Budget AS | Wholesale & retail | 2023 |
| Lysholm Bil Drift AS | Wholesale & retail | 2023 |
| Lysholm Invest AS | Professional & scientific | 2002 |
| Lystad Taxi AS | Transport & logistics | 2020 |
| Lystiglag AS | Information & communication | 2025 |
| Lyxn AS | Manufacturing | 2019 |
| LZ Holding AS | Financial services | 2018 |
| Lindbak Eiendom A/S | Real estate | 1970 |
| Lâche Da | Arts & recreation | 2021 |
| Lænt AS | Professional & scientific | 2021 |
| Lærebedrift AS | Education | 2023 |
| Læringsliv AS | Information & communication | 2021 |
| Lætt AS | Wholesale & retail | 2003 |
| Løbergstrøa AS | Health & social care | 2016 |
| Løft Helse AS | Education | 2022 |
| Løft Norge AS | Wholesale & retail | 2019 |
| Løft Utleie AS | Administrative & support | 2026 |
| Løkeberg Diversity AS | Professional & scientific | 2015 |
| Løkhaugen AS | Real estate | 2011 |
| Løkka Familiebarnehage AS | Education | 2023 |
| Løset AS | Health & social care | 2012 |
| Løset Holding AS | Health & social care | 2012 |
| Løvendahlske AS | Health & social care | 2021 |
| Løvetanna Landskap AS | Professional & scientific | 2004 |
| Løvik Og Jordet Invest AS | Real estate | 2005 |
| Løvsetvegen 4 AS | Real estate | 2013 |
| Løw Eiendom AS | Real estate | 2001 |
| Løw Kapital AS | | 2025 |
| Løye Holding AS | Financial services | 2016 |
| M Bakklandet AS | Hospitality | 2021 |
| M Byhaven AS | Hospitality | 2012 |
| M Hassel AS | | 2026 |
| M Marketing Og Event AS | Real estate | 2006 |
| M Properties AS | Real estate | 2017 |
| M Sommer AS | Wholesale & retail | 1996 |
| M Strand Holding AS | | 2023 |
| M Viggen Holding AS | | 2023 |
| M&A Bygg AS | Construction | 2021 |
| M&J Eiendom AS | Real estate | 2022 |
| M&M BLT Holding AS | | 2023 |
| M&M Investment AS | Information & communication | 2021 |
| M+B Aksjeselskap | Wholesale & retail | 1986 |
| M-Tech AS | Manufacturing | 2013 |
| M. Eli AS | | 2021 |
| M. Georg Holding AS | | 2021 |
| M. Haugan Invest AS | Construction | 2013 |
| M. Jenssen AS | | 2025 |
| M. Skaanes AS | Health & social care | 2022 |
| M. Øvergård Holding AS | Professional & scientific | 2025 |
| M.Eriksen Holding AS | | 2025 |
| M12 Trondheim AS | Hospitality | 2017 |
| Ma Momentum AS | | 2025 |
| Ma Spearfishing AS | Information & communication | 2025 |
| Ma Trading AS | Professional & scientific | 2024 |
| Ma-Be AS | Manufacturing | 2025 |
| Mabor 829 Holding AS | | 2023 |
| Maca Holding AS | Hospitality | 1993 |
| Macasto AS | Professional & scientific | 2025 |
| Macklein AS | Wholesale & retail | 2011 |
| Maco AS | Real estate | 2003 |
| Macpoint Consult AS | Information & communication | 1996 |
| Mad&Pt Invest AS | | 2020 |