| Ke Ellingsen Holding AS | Financial services | 2015 |
| Kea Invest AS | Professional & scientific | 2009 |
| Kebeno AS | | 2025 |
| Keen Eiendom AS | Real estate | 2021 |
| Keilir Holding AS | Agriculture & fishing | 2017 |
| Keks AS | Real estate | 2013 |
| Kemal Invest AS | | 2025 |
| Kemi AS | | 2025 |
| Kenma Invest AS | | 1990 |
| Kenna Invest 2 AS | | 2014 |
| Kennedy Properties AS | Real estate | 2018 |
| Kenneth H. Wathne AS | | 2013 |
| Kenneth Karlsen Holding AS | Real estate | 2012 |
| Kenneth Larsen Holding AS | | 2023 |
| Kenneth Opheim AS | Professional & scientific | 2005 |
| Kenneths Eiendom AS | Real estate | 1985 |
| Kep Holding AS | Financial services | 2013 |
| Keramikeren AS | Manufacturing | 2023 |
| Kermus AS | Transport & logistics | 2025 |
| Kersbergen Finans AS | Real estate | 2005 |
| Kersbergen Invest AS | Financial services | 2005 |
| Kestas Bygg AS | Construction | 2024 |
| Kev Eiendom AS | Real estate | 2007 |
| Key Energy Expert Network AS | | 2018 |
| Keyko AS | Administrative & support | 2019 |
| Keystone.No AS | Information & communication | 2010 |
| Kfskolene AS | Other services | 2014 |
| Kgmb Investering AS | Professional & scientific | 2005 |
| Khangela Consulting AS | Professional & scientific | 2005 |
| KHG Seksjon AS | Real estate | 2021 |
| Ki Drift AS | Arts & recreation | 2012 |
| Kibera AS | Professional & scientific | 2023 |
| Kika Da | Wholesale & retail | 1995 |
| Kikkerheia Vann Og Avløpslag SA | Water & waste | 2017 |
| Kiku AS | Education | 2004 |
| Kim P. Falck AS | | 2020 |
| Kind Group AS | Professional & scientific | 2016 |
| Kind People AS | Health & social care | 2015 |
| Kindem Holding AS | | 2000 |
| Kine Holding AS | | 2022 |
| Kinesisk Hillevåg Ta Med Hjem AS | Hospitality | 2013 |
| King Service AS | Administrative & support | 2019 |
| Kings Holding AS | | 2022 |
| Kings Invest AS | Financial services | 2006 |
| Kinkeliane AS | Manufacturing | 2011 |
| Kinly AS | Wholesale & retail | 1998 |
| Kinly Holding AS | Wholesale & retail | 2017 |
| Kioo AS | Wholesale & retail | 2023 |
| Kioskdrift Waseem Sael AS | Wholesale & retail | 2024 |
| Kipcorp AS | Financial services | 2005 |
| Kirderfelo AS | | 2024 |
| Kirkegata 15 AS | Real estate | 2012 |
| Kirkegata 17 AS | Real estate | 2008 |
| Kirkegata 3 Holding AS | Real estate | 2018 |
| Kirkegata 44 AS | Real estate | 2017 |
| Kirkegata 7 Stavanger AS | Real estate | 2023 |
| Kirkegaten 12 AS | Real estate | 1978 |
| Kirkegaten 14 AS | Real estate | 1996 |
| Kirkegaten 18 AS | Real estate | 1990 |
| Kirkegaten 19/21 AS | Real estate | 1999 |
| Kirkegaten 29 AS | Real estate | 2020 |
| Kirkegaten 31 AS | Real estate | 2014 |
| Kirkegaten 48 Da | Real estate | 2002 |
| Kirkegaten Eiendomsdrift AS | Real estate | 2026 |
| Kirkestien Eiendom AS | Real estate | 2019 |
| Kirkhus Montasje AS | Construction | 2022 |
| Kiropraktisk Senter Stavanger AS | Health & social care | 2005 |
| Kiropraktor Kristi Søndenå AS | | 2022 |
| Kiropraktor LB Varhaug AS | Health & social care | 2017 |
| Kiropraktor Mikal Dyrstad AS | Health & social care | 2020 |
| Kiry AS | Health & social care | 2011 |
| Kistenuten AS | | 2020 |
| Kitching Invest AS | | 2026 |
| Kitt Sandvik Holding AS | | 2018 |
| KJ Haga AS | | 2025 |
| Kjartan Skjelde AS | Other services | 2012 |
| Kjartan Skjelde Brands AS | Professional & scientific | 2020 |
| Kjeften Full AS | Hospitality | 2026 |
| Kjell Arne Haugland Holding AS | Professional & scientific | 2007 |
| Kjeller Vest AS | Real estate | 2022 |
| Kjelloye AS | Professional & scientific | 2023 |
| Kjelltech Invest AS | Professional & scientific | 2012 |
| Kjenyg Holding AS | | 2022 |
| Kjeringholmen Brasserie AS | Hospitality | 2025 |
| Kjetil Gryte AS | Wholesale & retail | 2018 |
| Kjetil Sunde AS | Real estate | 2011 |
| Kjetil Sunde Eiendom AS | Real estate | 2016 |
| Kjkvilhaugsvik Invest AS | | 2023 |
| Kjosavik AS | Wholesale & retail | 2002 |
| Kjosavik Holding AS | Wholesale & retail | 2020 |
| Kjosavik Import AS | Wholesale & retail | 2025 |
| KJR Finans AS | Financial services | 2011 |
| Kjølv AS | Professional & scientific | 2021 |
| Kjølvik Invest AS | | 2020 |
| KK Interiør AS | Wholesale & retail | 1996 |
| KKP Invest AS | Professional & scientific | 2015 |
| Klart Signal AS | Professional & scientific | 2024 |
| Klas Jønsson AS | Professional & scientific | 2005 |
| Klasaskjæret AS | Real estate | 2006 |
| Klaudi Holding AS | Financial services | 2005 |