| Lestole AS | Arts & recreation | 2015 |
| Leve Holding AS | | 2016 |
| Level Finans AS | Professional & scientific | 2016 |
| Level Group AS | Construction | 2012 |
| Level Mathuset AS | Hospitality | 2017 |
| Level Offshore AS | Administrative & support | 2018 |
| Level Offshore Management AS | Professional & scientific | 2021 |
| Level Personal AS | Professional & scientific | 2016 |
| Level Power & Automation AS | Construction | 2012 |
| Level Prosjekt AS | Administrative & support | 2016 |
| Level Up Bygg AS | Construction | 2024 |
| LFL Invest AS | Wholesale & retail | 2005 |
| Lie Herre AS | Wholesale & retail | 2003 |
| Lie Sportstournements AS | Professional & scientific | 2015 |
| Liestøl Eiendom AS | Real estate | 2017 |
| Liestøl Holding AS | Wholesale & retail | 2012 |
| Life Travel AS | Real estate | 2003 |
| Ligo Filmgalleriet Skåregaten AS | Arts & recreation | 2007 |
| Liknes Og Flatnes Eiendom AS | Real estate | 2016 |
| Liljegruppen AS | Other services | 2020 |
| Lilla Thai Massasje AS | Other services | 2020 |
| Lille Jacobi AS | Wholesale & retail | 2017 |
| Lillehammer Budservice AS | Real estate | 2025 |
| Limitless Trading AS | Education | 2018 |
| Lindangerveien Eiendom AS | Real estate | 2006 |
| Lindvik Consult AS | Professional & scientific | 2022 |
| Linus Salg AS | Wholesale & retail | 2025 |
| Linvegen AS | | 2025 |
| Liontarel Invest AS | Information & communication | 2023 |
| Litt Mer Service AS | Administrative & support | 2018 |
| Livestage AS | Real estate | 2020 |
| Livjo Invest AS | | 2019 |
| Livsring AS | Agriculture & fishing | 2023 |
| Liwell AS | Health & social care | 2026 |
| LKB Assets AS | Real estate | 2025 |
| LKB Eiendom AS | Real estate | 2025 |
| LKR 24 AS | | 2025 |
| LM Catering AS | Hospitality | 2008 |
| LM Kantinedrift AS | Hospitality | 2017 |
| Lonely Island AS | | 2019 |
| Longhammarvegen 23 AS | Real estate | 1993 |
| Longhammarvegen 24 AS | Real estate | 2021 |
| Longhammarvegen 28-30 AS | Real estate | 2018 |
| Lothes AS | Real estate | 2026 |
| Lothes Bar AS | Hospitality | 1991 |
| Lothes Mat & Vinhus AS | Hospitality | 2018 |
| Lotjan AS | Professional & scientific | 2005 |
| Lotus Service AS | Administrative & support | 2023 |
| Lund Dal Invest | | 2006 |
| Lutchfood Drift AS | Manufacturing | 2019 |
| Lux Olje & Kjemi AS | Wholesale & retail | 2011 |
| Luxus Frisør AS | Other services | 2021 |
| Ly Areal & Landskap AS | Professional & scientific | 2022 |
| Ly Holding AS | | 2026 |
| Ly Nguyen Taranger AS | Hospitality | 2024 |
| Lyfo AS | Health & social care | 2008 |
| Lykke Og Liten AS | Manufacturing | 2019 |
| Lyngholm Nord AS | Real estate | 2021 |
| Lyngholm Sør AS | Real estate | 2022 |
| Lysmesteren Haugesund AS | Construction | 1997 |
| Lysskar Eiendom AS | Real estate | 2024 |
| Lysskar Holding AS | Professional & scientific | 2023 |
| Lysskar Prosjektkonsult AS | Professional & scientific | 2024 |
| Laastad Invest AS | Real estate | 1927 |
| Lindhaug AS | Real estate | 1980 |
| Låkafossen Energi AS | Education | 2017 |
| Lærvarer AS | Wholesale & retail | 1974 |
| Lønneberget Barnehage AS | Education | 2023 |
| Løvvik Aero Telecom AS | Construction | 2013 |
| M Consept AS | Wholesale & retail | 2007 |
| M Rabinowitz AS | Real estate | 1946 |
| M. Gundersen AS | Health & social care | 2019 |
| M.Kallevik Invest AS | Financial services | 2014 |
| M.R. Invest AS | | 2025 |
| Ma. Invest AS | Real estate | 2023 |
| Maakeholmen AS | | 2023 |
| Macchiato AS | | 2023 |
| Madam Holdings AS | | 2023 |
| Madina Drosje Og Transport AS | Transport & logistics | 2024 |
| Maersk Training AS | Education | 2000 |
| Maes Sauna & Helse AS | Other services | 2023 |
| Maf AS | | 2024 |
| Magnus Wathne Holding AS | Real estate | 2005 |
| Maia Holding AS | Real estate | 2021 |
| Maia Property AS | Real estate | 2021 |
| Maisoneiendom AS | Construction | 2025 |
| Majato AS | Professional & scientific | 2022 |
| Makrotek AS | Professional & scientific | 2000 |
| Malerfirma RB AS | Construction | 2023 |
| Malermesterfirma Emberland AS | Construction | 2019 |
| Mamobr Holding AS | | 2023 |
| Mandacou AS | Real estate | 2013 |
| Mando Iniv AS | Professional & scientific | 2017 |
| Mani AS | Administrative & support | 2010 |
| Mano Forsikring AS | Financial services | 2021 |
| Manymore AS | Information & communication | 1995 |
| Mardal Elektro AS | Construction | 2026 |
| Mari Staveland AS | Professional & scientific | 2019 |
| Marilyn & James AS | Other services | 2023 |
| Marin Air Ltd. | | 1997 |