| Kha Invest AS | Financial services | 2012 |
| Khala AS | Administrative & support | 2022 |
| Kilen Consulting AS | Information & communication | 2018 |
| Kilsund Eiendom AS | Real estate | 2015 |
| Kim El AS | Construction | 2015 |
| Kim Igland Invest AS | | 2025 |
| Kiropraktorklinikken I Grimstad AS | Health & social care | 2019 |
| Kitrus AS | Information & communication | 1997 |
| Kjell Gilje AS | Construction | 2010 |
| Kjellviga Ingeniørsenter AS | Professional & scientific | 1989 |
| Kjøkken-Centeret Eiendom AS | Real estate | 1995 |
| Kkiland Holding AS | | 2021 |
| Klassisk I Sentrum AS | Arts & recreation | 2020 |
| Kleivene AS | Health & social care | 1996 |
| Klevgaten 2A AS | Real estate | 2023 |
| Klinikk Infusion AS | Other services | 2023 |
| Klæbu BT3 S3 AS | Real estate | 2025 |
| Klæbu BT3 S4 AS | Real estate | 2025 |
| KN Eiendom AS | Real estate | 2009 |
| KN Elektro AS | Construction | 2019 |
| Knigg Invest AS | Financial services | 2024 |
| Knut Axel Ugland Holding AS | Real estate | 2000 |
| Knut Axel Ugland Invest AS | Real estate | 2005 |
| Knutsens Event Og Supply AS | Wholesale & retail | 2018 |
| Kobuk AS | Wholesale & retail | 1994 |
| Kokkeplassen Eiendom AS | Real estate | 2006 |
| Kompanium Holding AS | | 2020 |
| Komposittservice AS | Manufacturing | 2020 |
| Konnestad AS | | 2025 |
| Konnestad Invest AS | Administrative & support | 2014 |
| Konvall AS | Financial services | 2012 |
| Korsnes Tellefsen Holding AS | | 2026 |
| KR Holding AS | Construction | 2018 |
| Krath Invest AS | | 2021 |
| Kraviga AS | Real estate | 2003 |
| Kreativ Blomsterdesign AS | Wholesale & retail | 2014 |
| Kreativ Design Ans | Wholesale & retail | 1990 |
| Kriag Ans | Wholesale & retail | 2011 |
| Kripe Invest AS | Education | 2025 |
| Kristoffer Evenstad Holding AS | | 2023 |
| Krosvollen AS | Wholesale & retail | 2013 |
| Ksa AS | Financial services | 2013 |
| KSB Utvikling AS | Real estate | 1994 |
| KSC Holding AS | Financial services | 2013 |
| Kuben Labs AS | Information & communication | 2025 |
| Kulturhuset Legesenter Da | Health & social care | 2017 |
| Kulturhuset Tannlegesenter Da | Administrative & support | 2020 |
| Kvalitex Yrkesklær Da | Wholesale & retail | 2002 |
| Kvinlaug Data Ans | Information & communication | 1989 |
| Kvås Invest AS | Construction | 1990 |
| Kyrkjestøyl Hyttebygg AS | Real estate | 2016 |
| Kystveien Handelseiendom AS | Real estate | 2018 |
| Kåntent Media AS | Information & communication | 2008 |
| L.K.Lorentzens Familierederi AS | Professional & scientific | 2016 |
| L3 Eiendom AS | Real estate | 2025 |
| L3 Holding AS | Real estate | 2020 |
| L32 Eiendom AS | Real estate | 2026 |
| La Femme Salong AS | Other services | 2016 |
| La Flamma AS | Hospitality | 2024 |
| La Herencia AS | | 2018 |
| La Lumière Du Nord Hundefrisør & Spa AS | Other services | 2014 |
| Lagerseksjoner AS | Real estate | 2017 |
| Lagerseksjoner Holding AS | Real estate | 2020 |
| Lagerseksjoner Nord-Norge AS | Real estate | 2021 |
| Lagerseksjoner Vest AS | Real estate | 2021 |
| Laminar AS | Information & communication | 2024 |
| Laminar Invest AS | Real estate | 2025 |
| Laminar RR AS | Professional & scientific | 2026 |
| Laminar Utvikling AS | | 2025 |
| Landmåler Hansen Utstyrutleie AS | Administrative & support | 2011 |
| LANDMÅLER1 AS | Professional & scientific | 2014 |
| Landvik Bygdehus AS | Real estate | 2003 |
| Landvik Forlag Ans Saaghus Og Hardeberg | Information & communication | 1987 |
| Landvik Gartneri AS | Agriculture & fishing | 2001 |
| Landvik Kystfiske AS | Agriculture & fishing | 2025 |
| Landvik Regnskap AS | Professional & scientific | 2024 |
| Landvik Regnskapslag SA | Professional & scientific | 1953 |
| Landvikstranda AS | Agriculture & fishing | 2011 |
| Langemyr Rådgivning Og Formidling AS | Professional & scientific | 2026 |
| Langtouw Invest AS | Professional & scientific | 2021 |
| Lars Erik Jåvold AS | Construction | 2012 |
| Lars Ivar Udjus AS | Construction | 2012 |
| Larsdal AS | Professional & scientific | 2014 |
| Larsen Multi Service AS | Agriculture & fishing | 2019 |
| Laugevoldveien Invest AS | Professional & scientific | 2025 |
| Lauritz Invest AS | | 2020 |
| Lauvland Holding AS | Wholesale & retail | 2005 |
| Lauvland Naturtjenester AS | Agriculture & fishing | 2017 |
| Lauvstø AS | Real estate | 2021 |
| Lauvåsen Tjenester AS | Professional & scientific | 2022 |
| Layer 3 AS | Professional & scientific | 2024 |
| LDJ AS | Real estate | 2014 |
| Le Norgrens Schakt | Mining & quarrying | 1997 |
| Legitim AS | Health & social care | 2008 |
| Lehland Invest AS | | 2006 |
| Lekehuset Grimstad AS | Wholesale & retail | 2026 |
| Lekekassen AS | Wholesale & retail | 1984 |
| Lekekassen Holding AS | Real estate | 2021 |
| Len Holding AS | Real estate | 2012 |
| Lerø Holding AS | | 2020 |