| Kosd Holding AS | | 2024 |
| Kraft Bygg AS | Construction | 2015 |
| Kraft Eiendomsselskap AS | Real estate | 2022 |
| Kraft Foto AS | Professional & scientific | 2020 |
| Kragseth Invest AS | Financial services | 2018 |
| Kramboden Garn- Og Stoffstue AS | Real estate | 1984 |
| Krambua Vår Ans | Wholesale & retail | 2001 |
| Kreativklynge AS | Real estate | 2019 |
| Krimo Invest AS | | 2024 |
| Krimyr Holding AS | Real estate | 2018 |
| Kringsjaa AS | Agriculture & fishing | 2001 |
| Krispen AS | | 2019 |
| Krispo AS | | 2023 |
| Kristiania Invest AS | | 2022 |
| KRISTIANPLASS1 AS | Real estate | 2012 |
| Krivi AS | Real estate | 2015 |
| KRN Holding AS | Real estate | 2014 |
| Krobein Invest AS | | 2019 |
| Krohn Dale Invest AS | | 2012 |
| Krohn Kapital AS | | 2025 |
| Krokmyra Utbygging Vva Ans | Construction | 2022 |
| Kroktrans AS | Transport & logistics | 2017 |
| Kroselma AS | Professional & scientific | 1992 |
| Krua Thai Takeaway AS | Hospitality | 2017 |
| KS Brannsikring Bye AS | Professional & scientific | 2024 |
| Kso Invest AS | Administrative & support | 2024 |
| KTF Finans AS | Real estate | 2019 |
| KTF Holding AS | Real estate | 2019 |
| Ktjm Holding AS | Professional & scientific | 1998 |
| Kultariro AS | Wholesale & retail | 2017 |
| Kultorp AS | Real estate | 2015 |
| Kulturhistorisk Formidling AS | Arts & recreation | 2020 |
| Kulturhuset Varde AS | Real estate | 2009 |
| Kumlin Fuktdimensjonering AS | Professional & scientific | 2024 |
| Kva-Spil Ltd | Wholesale & retail | 1971 |
| Kvalsund Ingeniører AS | Professional & scientific | 1983 |
| Kvalø Invest AS | | 2025 |
| Kvam VVS AS | Construction | 2003 |
| Kvane AS | | 2012 |
| Kvantra AS | Information & communication | 2025 |
| Kvantra Operations AS | Information & communication | 2026 |
| Kvassneset AS | Real estate | 2017 |
| Kveldro AS | Real estate | 2019 |
| Kveldsro AS | Real estate | 2010 |
| Kveldssolvegen AS | Real estate | 2021 |
| Kvenna AS | Mining & quarrying | 1983 |
| Kvennåi Kraftverk AS | Energy | 2010 |
| Kvernhuset AS | Real estate | 1935 |
| Kverve Næring AS | Real estate | 2017 |
| Kvik Ålesund AS | Wholesale & retail | 2008 |
| Kvist Kapital AS | | 2023 |
| Kvålsvoll Design AS | Professional & scientific | 2007 |
| KW23 E5 AS | Real estate | 2018 |
| KWG 56 AS | Real estate | 2007 |
| Kwgt 25 Utleie AS | Real estate | 2021 |
| Kyst Service AS | Professional & scientific | 2011 |
| Kystbunker AS | Transport & logistics | 2010 |
| Kå Ge AS | Information & communication | 2024 |
| L Sunde AS | Manufacturing | 1932 |
| L. K. Bygg AS | Construction | 2015 |
| La Belle AS | Wholesale & retail | 2001 |
| Laader Berg AS | Manufacturing | 2020 |
| Laader Berg Group AS | Manufacturing | 1989 |
| Lade AS | Professional & scientific | 2010 |
| Lakkbygg Håhjem AS | Real estate | 2007 |
| Lakkskade AS | Other services | 2014 |
| Lalevi Invest AS | Professional & scientific | 2023 |
| Lamella AS | Manufacturing | 2018 |
| Lampholmen AS | Real estate | 2000 |
| Lancar AS | Agriculture & fishing | 2016 |
| Lancar Nutri AS | Professional & scientific | 2019 |
| Lancea AS | Wholesale & retail | 2026 |
| Lands AS | Professional & scientific | 2012 |
| Langano Holding AS | Financial services | 2014 |
| Langholm Holding AS | Real estate | 2015 |
| Langrabben 56 AS | Real estate | 2024 |
| Langrabben 71 AS | Real estate | 2022 |
| Langset Invest AS | | 2022 |
| Langvas AS | Construction | 1998 |
| Lany Invest AS | | 2022 |
| Lars M Fugledal AS | Professional & scientific | 1985 |
| Lars Marius Akslen AS | Administrative & support | 2012 |
| Larsgården Mat AS | Wholesale & retail | 2021 |
| Lascala AS | Wholesale & retail | 2004 |
| Lash AS | | 2024 |
| Latno Group AS | Construction | 2026 |
| Lauparen AS | | 2022 |
| Lavos AS | Financial services | 2006 |
| Lbsafe AS | Professional & scientific | 2020 |
| LBT AS | Transport & logistics | 2016 |
| LC Service AS | Transport & logistics | 2023 |
| Lcorp AS | Information & communication | 2022 |
| Lcorp Holding AS | Information & communication | 2023 |
| Legal & Finance AS | Professional & scientific | 1998 |
| Legalia Advokatfirma AS | Professional & scientific | 2025 |
| Lehres Bygg Og Rep AS | | 2020 |
| Leif Erik Sunde AS | Financial services | 2005 |
| Leifseth Invest AS | Wholesale & retail | 2021 |
| Leikeland AS | Wholesale & retail | 2007 |
| Leine Frisør AS | Other services | 2008 |