| Lars Nicolaysen Holding AS | | 2022 |
| Lauvhøgda Invest AS | Real estate | 2007 |
| Lave Priser AS | Wholesale & retail | 2017 |
| Lavvo Østlandet AS | Administrative & support | 2005 |
| Leadhouse AS | Information & communication | 2022 |
| Leaw Holding AS | | 2023 |
| Leif Onsrud Holding AS | Financial services | 2005 |
| Lekang Eiendom AS | Real estate | 2014 |
| Lekang Finans AS | Administrative & support | 1996 |
| Lekang Holding AS | Wholesale & retail | 2016 |
| Lelde Photo AS | Professional & scientific | 2023 |
| Lena Handelspark AS | Real estate | 2009 |
| Lena Og Centrum Trafikkskole AS | Education | 1993 |
| Lenagata 32 AS | Real estate | 2021 |
| Lenagata 50 AS | Real estate | 2021 |
| Lenatunet AS | Real estate | 2007 |
| Lene Schjørlien AS | Real estate | 2021 |
| Lento AS | Real estate | 2004 |
| Leona AS | Information & communication | 2021 |
| Liaklev Invest AS | Real estate | 2019 |
| Lille Happy Time Da | Hospitality | 2008 |
| Lille Kafe AS | Hospitality | 2013 |
| Lilleengen Bygg AS | Construction | 2024 |
| Lilleengen Holding AS | | 2026 |
| Lillehammer Eiendomssenter AS | Real estate | 2001 |
| Lillehammer Trading Concept Da | Wholesale & retail | 1999 |
| Lindbak IT AS | Information & communication | 2007 |
| Lindborg Eiendom AS | Real estate | 2021 |
| Lindborg Holding AS | Real estate | 2017 |
| Lindborg Ventures AS | Other services | 2024 |
| Linn Holding AS | | 2025 |
| Linnerud & Sveen Holding AS | Financial services | 2018 |
| Linora Invest AS | Real estate | 2020 |
| Liodden Holding AS | Professional & scientific | 2013 |
| Litra Eiendom Lillehammer AS | Real estate | 2002 |
| Locomotiv AS | Information & communication | 2019 |
| Low Holding AS | | 2020 |
| LSJ Invest AS | Professional & scientific | 2019 |
| Ludvig Raae AS | Professional & scientific | 2023 |
| Lun Bolig AS | Real estate | 2021 |
| Lun Entreprenør AS | Construction | 2014 |
| Lun Utvikling AS | Real estate | 2021 |
| Luna Restaurant AS | Hospitality | 2025 |
| Lundgutua 2 Hamar AS | Real estate | 2002 |
| Lundstad Trafikkskole AS | Education | 2014 |
| Lunto AS | Real estate | 2012 |
| Lusa Invest AS | | 2022 |
| Lysøy Holding AS | Financial services | 2015 |
| Landmark AS | Real estate | 1968 |
| Lærling Øst AS | Education | 2015 |
| Løfgren AS | Real estate | 1997 |
| Løitenlys AS | Wholesale & retail | 2025 |
| Lønstad Invest AS | Financial services | 2005 |
| Løten Butikkeiendom AS | Real estate | 2005 |
| Løten Næringspark AS | Real estate | 2012 |
| Løvbergsmoen Utvikling AS | | 2016 |
| M & I Bearbeiding AS | Agriculture & fishing | 2013 |
| M&P Bardrift AS | Hospitality | 2020 |
| M&P Holding AS | Hospitality | 2010 |
| M.G Restaurant AS | Hospitality | 2024 |
| M9 Eiendom AS | Real estate | 2005 |
| Macus Eiendom AS | Real estate | 2004 |
| Madonna Frisørene Gjøvik AS | Other services | 2006 |
| Magasinparken AS | Real estate | 2020 |
| MAGNET1 AS | Health & social care | 2021 |
| Majestic Barber AS | Other services | 2023 |
| Maka Holding AS | Financial services | 2012 |
| Makingspace AS | Professional & scientific | 2004 |
| Maler Og Byggtapetserer Pettersen Og Pettersen Ans | Construction | 2002 |
| Malermester Rune Stende Ans | Construction | 2000 |
| Malermester Rune Stende AS | Construction | 2014 |
| Mange Ting-Bruktboka AS | Wholesale & retail | 2012 |
| Manijo AS | Professional & scientific | 2021 |
| Mantorell Holding AS | | 2024 |
| Mapt 2:0 AS | Wholesale & retail | 2024 |
| Marihøna Barnehage SA | Education | 1990 |
| Marisagvegen 8-9 Moelv AS | Real estate | 2012 |
| Marius Jensen AS | | 2024 |
| Markestad Eiendom AS | Real estate | 1991 |
| Master-Service AS | Construction | 2004 |
| Maton AS | Real estate | 2005 |
| Mats Haug Walby AS | | 2025 |
| Mats Nicolaysen Holding AS | | 2022 |
| Maudal 1973 AS | Arts & recreation | 2019 |
| Maudal AS | Real estate | 2010 |
| Mausetvegen 30 AS | Real estate | 2021 |
| Mav Holding AS | | 2023 |
| Medflow AS | Administrative & support | 2023 |
| Medlemsbladet Fraternitas Da | Information & communication | 2016 |
| Mednordix AS | Wholesale & retail | 2001 |
| Meer AS | Real estate | 1991 |
| Meili AS | Wholesale & retail | 2023 |
| Men Holding AS | | 2024 |
| Mengen Butikkdrift AS | Wholesale & retail | 2019 |
| Mentist Da | Arts & recreation | 2019 |
| Mesterhus Innlandet AS | Real estate | 2015 |
| MF Solutions AS | | 2024 |
| Mgarang AS | | 2022 |
| MH Psykomotorisk Fysioterapi AS | Health & social care | 2019 |
| Mie Holding AS | | 2019 |