| Krone Hanssen Scandinavia AS | Wholesale & retail | 1998 |
| Krone Utvikling AS | Real estate | 2006 |
| Kru Holding AS | Administrative & support | 2016 |
| Kruttmølleveien 28 AS | Real estate | 2014 |
| Krystal AS | Manufacturing | 1987 |
| Krystallfoto Da | Wholesale & retail | 2012 |
| KRZ Holding AS | | 2021 |
| Krzysztof Lemanski AS | Financial services | 2017 |
| Ksci AS | | 2026 |
| KSL Invest AS | Financial services | 2005 |
| Kukaraja Consulting AS | Professional & scientific | 2022 |
| Kulding AS | Professional & scientific | 1993 |
| Kulkompaniet AS | Wholesale & retail | 1993 |
| Kummeneje Translations AS | Professional & scientific | 2024 |
| Kundeklar.No AS | Information & communication | 2023 |
| Kurdernes Hus Drammen AS | Hospitality | 2019 |
| Kurt Werner Rystad Og Bård Bårnes Network Group KB Network Da | Information & communication | 1997 |
| KV Konsult AS | Professional & scientific | 2026 |
| Kvalitet Bygg AS | Construction | 2026 |
| Kvalitetsbistand AS | Health & social care | 2016 |
| Kvalitettransport AS | Transport & logistics | 2025 |
| Kvalvåg Invest AS | | 2011 |
| Kvartal Elektro AS | Construction | 2021 |
| Kveldro Overnatting AS | Hospitality | 2021 |
| Kverve Invest AS | Real estate | 2008 |
| Kvinnegardsliv AS | Administrative & support | 2020 |
| Kwiik Holding AS | | 2008 |
| Knut Haraldsens Farvehandel A/S | Wholesale & retail | 1983 |
| Kønners Holding AS | | 2020 |
| L H Holding AS | Hospitality | 1985 |
| L&T Quality Imports AS | Wholesale & retail | 2023 |
| L'Equitation AS | Education | 2017 |
| L3VEL AS | Information & communication | 2026 |
| La Properties AS | Real estate | 2026 |
| La Boulangerie AS | Manufacturing | 2025 |
| La Femme Salon AS | Other services | 2019 |
| Labinvest AS | Wholesale & retail | 2025 |
| Labos Da | Construction | 1995 |
| Ladenta AS | Health & social care | 1990 |
| Lafton Og Skoglund AS | Construction | 1989 |
| Lag Holding AS | Real estate | 2008 |
| Lagerquist Invest AS | | 2019 |
| Lagni AS | | 2025 |
| Lagulise AS | Real estate | 2005 |
| Laid-Back Productions AS | Information & communication | 2024 |
| Lakkpleier'N Da | Other services | 2005 |
| Lala Kebab Og Pizza Da | Hospitality | 2019 |
| Laman AS | Financial services | 2012 |
| Lamar Express AS | Transport & logistics | 2025 |
| Land Bygg AS | Construction | 2025 |
| Lande Kapital AS | Real estate | 2024 |
| Lande Property AS | Real estate | 2025 |
| Landfalløya 105 Eiendom AS | Real estate | 2010 |
| Landfalløya Legesenter Da | Health & social care | 2009 |
| Langebru Eiendom AS | Real estate | 2022 |
| Langeland Landbrukstakst Og Rådgivning AS | Real estate | 2007 |
| Langeland-Invest AS | | 2021 |
| Langelitind Invest AS | | 2021 |
| Langesgate 7 a AS | Real estate | 2017 |
| Langesgate 7 B Ans | Real estate | 2000 |
| Langesgate Eiendom Drammen AS | Real estate | 2014 |
| Lanho Eiendom AS | Real estate | 2006 |
| Lani Invest AS | Wholesale & retail | 2004 |
| Lanor AS | Wholesale & retail | 2020 |
| Lapp Norway AS | Wholesale & retail | 1968 |
| Lapp Real Estate Norway AS | Wholesale & retail | 2006 |
| Laproma AS | Professional & scientific | 2024 |
| Lara Fritid AS | Wholesale & retail | 1992 |
| Lare Holding AS | | 2017 |
| Large Holding AS | Financial services | 2005 |
| Lars Egil Ljungberg Holding AS | | 2021 |
| Lars Gjønnes Holding AS | Real estate | 2025 |
| Lars Haukeland AS | Health & social care | 2006 |
| Lars Moen Holding AS | Professional & scientific | 2025 |
| Larsen Real Estate AS | Real estate | 2015 |
| Lasse Ulriksen AS | Information & communication | 2022 |
| Lauritz Drammen AS | Hospitality | 1992 |
| Lauritzen AS | Wholesale & retail | 2010 |
| Lauritzen Finans AS | Real estate | 2017 |
| Lauritzen Invest AS | | 2020 |
| Lauritzen Kapital AS | | 2021 |
| Lauritzen Trio AS | Financial services | 2005 |
| Lawa LV AS | Professional & scientific | 2015 |
| LB Filtbygg AS | | 2021 |
| Leadboost AS | | 2024 |
| Leadenhall AS | Wholesale & retail | 2010 |
| Leadway AS | Administrative & support | 2025 |
| Lecas Mat AS | Wholesale & retail | 2026 |
| Led Hub AS | Professional & scientific | 2024 |
| Lederhelse AS | Professional & scientific | 2026 |
| Ledia AS | Professional & scientific | 2022 |
| Lednet Co-Op AS | | 2026 |
| Ledvei AS | Information & communication | 2025 |
| Legene Greibrokk AS | Health & social care | 2008 |
| Legetjenesten AS | Health & social care | 2019 |
| Lehar Holding AS | | 2025 |
| Leie Folk AS | Information & communication | 2026 |
| Leifi AS | | 2023 |
| Leithe Holding AS | | 2020 |
| Lekehuset Partner AS | Wholesale & retail | 1989 |