| Lamar AS | Hospitality | 2020 |
| Langbakk AS | Construction | 2020 |
| Langstranda 3 Eiendom AS | Real estate | 2020 |
| Langstranda 4 AS | Real estate | 2010 |
| Langstranda AS | Real estate | 2020 |
| Langås & Lundeng Ans | Construction | 2003 |
| Langås AS | Real estate | 2014 |
| Langås Bygg AS | Construction | 2005 |
| Langåsen Storkiosk AS | Wholesale & retail | 1993 |
| Langøya Eiendom AS | Real estate | 2014 |
| Lappedilla AS | Wholesale & retail | 2004 |
| Lardan Holding AS | | 2021 |
| Lars Berbusmel AS | | 2018 |
| Lars Meyers Gate 9 AS | Real estate | 2018 |
| Lars Monsen Gear AS | Wholesale & retail | 2017 |
| Lasse Nilssen Eiendom AS | Real estate | 1989 |
| Leaf AS | Real estate | 2005 |
| Learn Your Part AS | Education | 2025 |
| Lebreil Holding AS | | 2024 |
| Left Join Lateral AS | | 2018 |
| Lege Carl Knutssøn AS | Health & social care | 2014 |
| Lege Marius Edvardsen AS | Health & social care | 2021 |
| Lege Marius Johansen AS | Health & social care | 2014 |
| Legendary Systems AS | Information & communication | 2017 |
| Leger I Nord AS | Health & social care | 2012 |
| Leiand Invest AS | Professional & scientific | 2020 |
| Leiefiks AS | Real estate | 2024 |
| Leinad Invest AS | | 2024 |
| Lemé Da | Arts & recreation | 2024 |
| Lessmessmons AS | Professional & scientific | 2025 |
| Let's Go North AS | Administrative & support | 1990 |
| Lettbyggteknikk AS | Construction | 1993 |
| Lfcj Holding AS | | 2020 |
| LH Fysioterapi AS | Health & social care | 2014 |
| Libriotech AS | Information & communication | 2017 |
| Lie Forvaltning AS | | 2025 |
| Lie-Eiendom AS | Real estate | 2005 |
| Lien's Anleggsteknikk AS | Construction | 2023 |
| Lifa AS | Wholesale & retail | 2022 |
| Likast Invest AS | Financial services | 2016 |
| Liljedal Tann AS | Health & social care | 2024 |
| Lille Cafè City Nord AS | Hospitality | 2011 |
| Lillegaard Capital AS | Real estate | 2017 |
| Lillegaard Eiendom AS | Real estate | 2005 |
| Lillegaard Eiendom Holding AS | Real estate | 2023 |
| Lillegaard Holding AS | Construction | 2005 |
| Lillegaard Hylle II AS | | 2025 |
| Lillegaard Invest AS | Real estate | 2007 |
| Lillegaard Management AS | Professional & scientific | 2021 |
| Lillegaard Tannklinikk AS | Health & social care | 2004 |
| Lillehammer Prosjektutvikling AS | Real estate | 2001 |
| Lime Frisør AS | Other services | 2006 |
| Limt AS | Arts & recreation | 2006 |
| Lindas AS | Professional & scientific | 2025 |
| Line Ånderbakk Olsen AS | | 2025 |
| Linjeconsult AS | Professional & scientific | 2009 |
| Link Psykologtjenester AS | Health & social care | 2021 |
| Linken Eiendom AS | Real estate | 1999 |
| Linkpro AS | Real estate | 2015 |
| Linkpro Bolig AS | Real estate | 2015 |
| Lise Fygle AS | Financial services | 2015 |
| Listig AS | Financial services | 2017 |
| Liv Holding AS | | 2020 |
| Liv I Byen AS | Administrative & support | 2013 |
| Livet På Slipen AS | Professional & scientific | 2023 |
| Lltp AS | Construction | 2020 |
| LN Auto AS | Other services | 2024 |
| Lode Holding AS | | 2021 |
| Lofot Seafood AS | Wholesale & retail | 2017 |
| Lofoten Arctic Eiendom AS | Real estate | 2020 |
| Lofothavn 3 AS | Real estate | 2008 |
| Lofothval AS | Manufacturing | 2006 |
| Logoped Mnll Marit Grepperud AS | Health & social care | 2015 |
| Lokal Fiber AS | Information & communication | 2025 |
| Lokfører Johnsen AS | Hospitality | 2019 |
| Lorentzo AS | | 2006 |
| Los Analytics AS | Information & communication | 2022 |
| Lou Holding AS | | 2017 |
| LP Hoof Design AS | Agriculture & fishing | 2021 |
| LSL Investment AS | Financial services | 2020 |
| Ludvig's Bruktbokhandel AS | Wholesale & retail | 2018 |
| Lufta Invest AS | Administrative & support | 2022 |
| Lundseng AS | Real estate | 2018 |
| Lyd På Hjul AS | Wholesale & retail | 2007 |
| Lydteamet AS | Arts & recreation | 2005 |
| Lykke Binderi AS | Wholesale & retail | 2012 |
| Lykta AS | Health & social care | 2021 |
| Lyng Glass AS | Construction | 2002 |
| Lyngar AS | Wholesale & retail | 2005 |
| Lynx Publishing AS | Information & communication | 2018 |
| Lyrstad Holding AS | | 2020 |
| Lyseon AS | Professional & scientific | 2022 |
| Lyst Bodø AS | Arts & recreation | 1996 |
| Lyste AS | Professional & scientific | 2024 |
| Lysthushaugen AS | Real estate | 2012 |
| Lystpå AS | Hospitality | 2007 |
| Løding AS | Real estate | 2020 |
| Løpshavn AS | Real estate | 2004 |
| Løvold AS | Manufacturing | 1996 |
| Løvold Gården AS | Real estate | 2012 |