| Klovning Holding AS | Real estate | 2005 |
| Klubbleverandøren AS | Wholesale & retail | 2022 |
| KLV Stålarbeider AS | Manufacturing | 2019 |
| Kma Vest Holding AS | Construction | 2023 |
| Knausen AS | Real estate | 1985 |
| Knlh France AS | Transport & logistics | 2023 |
| Knot Fso 1 AS | Transport & logistics | 2013 |
| Knot Fso 2 AS | Transport & logistics | 2014 |
| Knot Fso AS | Transport & logistics | 2013 |
| Knot Management AS | Transport & logistics | 2010 |
| Knot Shuttle Tankers 17 AS | Transport & logistics | 2012 |
| Knot Shuttle Tankers 18 AS | Transport & logistics | 2012 |
| Knot Shuttle Tankers 20 AS | Transport & logistics | 2011 |
| Knot Shuttle Tankers 21 AS | Transport & logistics | 2013 |
| Knot Shuttle Tankers 24 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 25 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 26 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 27 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 29 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 30 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 31 AS | Transport & logistics | 2014 |
| Knot Shuttle Tankers 32 AS | Transport & logistics | 2017 |
| Knot Shuttle Tankers 33 AS | Transport & logistics | 2018 |
| Knot Shuttle Tankers 34 AS | Transport & logistics | 2018 |
| Knot Shuttle Tankers 35 AS | Transport & logistics | 2018 |
| Knot Shuttle Tankers 37 AS | Transport & logistics | 2018 |
| Knot Shuttle Tankers 41 AS | Transport & logistics | 2019 |
| Knot Shuttle Tankers 42 AS | Transport & logistics | 2019 |
| Knot Shuttle Tankers 43 AS | Transport & logistics | 2023 |
| Knot Shuttle Tankers 44 AS | Transport & logistics | 2023 |
| Knot Shuttle Tankers 45 AS | Transport & logistics | 2023 |
| Knot Shuttle Tankers 46 AS | Transport & logistics | 2024 |
| Knot Shuttle Tankers 47 AS | | 2024 |
| Knot Shuttle Tankers 48 AS | | 2024 |
| Knot Shuttle Tankers 49 AS | | 2024 |
| Knot Shuttle Tankers 50 AS | | 2024 |
| Knot Shuttle Tankers 51 AS | | 2024 |
| Knot Shuttle Tankers 52 AS | | 2024 |
| Knot Shuttle Tankers 53 AS | | 2025 |
| Knot Shuttle Tankers 54 AS | | 2025 |
| Knot Shuttle Tankers AS | Transport & logistics | 2012 |
| Knusk AS | Real estate | 2018 |
| Knut Knutsen O a S | | 1937 |
| Knuto AS | Real estate | 2002 |
| Knutsen Atlantic Chartering AS | Transport & logistics | 2002 |
| Knutsen Ballast Water AS | Transport & logistics | 2008 |
| Knutsen Canadian Chartering AS | Transport & logistics | 2002 |
| Knutsen Kyst LNG AS | Transport & logistics | 2002 |
| Knutsen Kyst LNG KS | Transport & logistics | 2002 |
| Knutsen LNG 56 AS | | 2026 |
| Knutsen LNG AS | Transport & logistics | 2013 |
| Knutsen LNG II AS | Transport & logistics | 2018 |
| Knutsen Marine Services AS | Transport & logistics | 2005 |
| Knutsen New Energy AS | Mining & quarrying | 2012 |
| Knutsen Newfoundland Chartering AS | Transport & logistics | 2006 |
| Knutsen Nyk Carbon Carriers AS | Professional & scientific | 2021 |
| Knutsen Nyk LNG Holding AS | Transport & logistics | 2016 |
| Knutsen Nyk LNG Holding Viii AS | Transport & logistics | 2017 |
| Knutsen Nyk Offshore Tankers AS | Transport & logistics | 2010 |
| Knutsen Nyk Shuttle Tankers 16 AS | Transport & logistics | 2011 |
| Knutsen Oas Crewing AS | Administrative & support | 2010 |
| Knutsen Oas Crewing Eastern Europe AS | Administrative & support | 2023 |
| Knutsen Oas Management AS | Transport & logistics | 2006 |
| Knutsen Oas ML AS | Administrative & support | 2018 |
| Knutsen Oas Offshore AS | Administrative & support | 2000 |
| Knutsen Oas Shipping AS | Administrative & support | 1982 |
| Knutsen Shuttle Tankers 13 AS | Transport & logistics | 2011 |
| Knutsen Shuttle Tankers 14 AS | Transport & logistics | 2011 |
| Knutsen Shuttle Tankers 15 AS | Transport & logistics | 2011 |
| Knutsen Shuttle Tankers 19 AS | Transport & logistics | 2012 |
| Knutsen Shuttle Tankers 3 AS | Transport & logistics | 2010 |
| Knutsen Shuttle Tankers Pool AS | Transport & logistics | 2000 |
| Knutsen Shuttle Tankers Xii AS | Transport & logistics | 2007 |
| Knutsen Takst AS | Real estate | 2019 |
| Knutsen Tankers 3 AS | Transport & logistics | 2008 |
| Knutsen Technology AS | Transport & logistics | 2007 |
| Knutsen Voc AS | Transport & logistics | 2001 |
| Knutsen Voc KS | Professional & scientific | 2001 |
| KNZ Holding AS | | 2023 |
| Kolbeinsen Invest AS | | 2012 |
| Kold Invest AS | Financial services | 2012 |
| Kolflaath Invest AS | | 2025 |
| Kolnes Boligfelt AS | Real estate | 2001 |
| Kompetansesentervest AS | Health & social care | 2020 |
| Kompetansesentervest Bpa AS | Health & social care | 2024 |
| Kompis Amanda AS | Hospitality | 2022 |
| Komplett Regnskap AS | Professional & scientific | 1983 |
| Kon-Tiki Invest AS | Real estate | 2023 |
| Konform Holding AS | Professional & scientific | 2013 |
| Kongle Kompetanse AS | Professional & scientific | 2016 |
| Kongshavn Regnskap AS | Professional & scientific | 1934 |
| Kongslia Utvikling AS | Real estate | 2020 |
| Konstruktiv Eiendom AS | Real estate | 2012 |
| Kontor 1913 AS | Professional & scientific | 2024 |
| Kontur Kister AS | Wholesale & retail | 2020 |
| Kontuto Holding AS | | 2023 |
| Koralfisk AS | Real estate | 1992 |
| Koralfisk III AS | Real estate | 2020 |
| Koralfisk IV AS | Real estate | 2020 |
| Korea Holdco 1 AS | Professional & scientific | 2021 |