| Klosterøya Vest Næring AS | Skien | 2013 |
| Klostransport AS | Aurskog | 2026 |
| Klubben Parkering AS | Søreidgrend | 2021 |
| Klungerbo Traktor Og Maskin AS | Jonsvatnet | 2010 |
| Klungervik Dyretransport AS | Ytre Snillfjord | 2026 |
| Klungervik Transport AS | Ytre Snillfjord | 2016 |
| Kløfta Bygg Og Transport AS | Kløfta | 2023 |
| Kløfta Leie Og Transport AS | Skogbygda | 2025 |
| Kløverlaks II AS | Storebø | 2021 |
| KM Bil Og Transport AS | Stavsjø | 2026 |
| KM Invest AS | Fauske | 2006 |
| KM Steel Service Norge AS | Oslo | 2018 |
| KM. Transport AS | Stange | 2013 |
| KMF-T2 AS | Bergen | 2023 |
| KML Transport AS | Langhus | 2021 |
| KMN Transport Og Sjåførservice AS | Skudeneshavn | 2025 |
| KMT SP. Z O.O. Nuf | Pl-16-200 Dabrowa Bialostocka | 2023 |
| Kmts AS | Sortland | 2013 |
| KN Kranservice AS | Sistranda | 2016 |
| KN Transport AS | Gaupne | 1987 |
| Knappen Sjø AS | Klokkarvik | 2000 |
| Knapphus 5576 AS | Øvre Vats | 2026 |
| Knarvik Parkering AS | Isdalstø | 2020 |
| Knausen Maskin Og Transport AS | Loddefjord | 2009 |
| Knippen Transport AS | Andebu | 2017 |
| Knive AS | Vikersund | 1985 |
| Knlh France AS | Haugesund | 2023 |
| KNN Services AS | Dalekvam | 2026 |
| Knot Fso 1 AS | Haugesund | 2013 |
| Knot Fso 2 AS | Haugesund | 2014 |
| Knot Fso AS | Haugesund | 2013 |
| Knot Management AS | Haugesund | 2010 |
| Knot Shuttle Tankers 17 AS | Haugesund | 2012 |
| Knot Shuttle Tankers 18 AS | Haugesund | 2012 |
| Knot Shuttle Tankers 20 AS | Haugesund | 2011 |
| Knot Shuttle Tankers 21 AS | Haugesund | 2013 |
| Knot Shuttle Tankers 24 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 25 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 26 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 27 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 29 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 30 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 31 AS | Haugesund | 2014 |
| Knot Shuttle Tankers 32 AS | Haugesund | 2017 |
| Knot Shuttle Tankers 33 AS | Haugesund | 2018 |
| Knot Shuttle Tankers 34 AS | Haugesund | 2018 |
| Knot Shuttle Tankers 35 AS | Haugesund | 2018 |
| Knot Shuttle Tankers 37 AS | Haugesund | 2018 |
| Knot Shuttle Tankers 41 AS | Haugesund | 2019 |
| Knot Shuttle Tankers 42 AS | Haugesund | 2019 |
| Knot Shuttle Tankers 43 AS | Haugesund | 2023 |
| Knot Shuttle Tankers 44 AS | Haugesund | 2023 |
| Knot Shuttle Tankers 45 AS | Haugesund | 2023 |
| Knot Shuttle Tankers 46 AS | Haugesund | 2024 |
| Knot Shuttle Tankers AS | Haugesund | 2012 |
| Knut Arne Jørstad AS | Verdal | 1981 |
| Knut Bjerke Transport AS | Lommedalen | 2015 |
| Knut Bugge Kran Og Transport AS | Melhus | 2010 |
| Knut Erik Johnsen Transport AS | Bjørndalstræ | 2013 |
| Knut Fanebust AS | Lindås | 2002 |
| Knut Hansen Transport AS | Laksvatn | 2022 |
| Knut J Eltervåg Transport AS | Hommersåk | 2015 |
| Knut Jakola Transport AS | Kirkenes | 2007 |
| Knut Lossius Taxi AS | Trondheim | 2017 |
| Knuts Transport AS | Steinkjer | 1996 |
| Knutsen Atlantic Chartering AS | Haugesund | 2002 |
| Knutsen Ballast Water AS | Haugesund | 2008 |
| Knutsen Canadian Chartering AS | Haugesund | 2002 |
| Knutsen Kyst LNG AS | Haugesund | 2002 |
| Knutsen Kyst LNG KS | Haugesund | 2002 |
| Knutsen LNG AS | Haugesund | 2013 |
| Knutsen LNG II AS | Haugesund | 2018 |
| Knutsen Marine Services AS | Haugesund | 2005 |
| Knutsen Newfoundland Chartering AS | Haugesund | 2006 |
| Knutsen Nyk LNG Holding AS | Haugesund | 2016 |
| Knutsen Nyk LNG Holding Viii AS | Haugesund | 2017 |
| Knutsen Nyk Offshore Tankers AS | Haugesund | 2010 |
| Knutsen Nyk Shuttle Tankers 16 AS | Haugesund | 2011 |
| Knutsen Oas Espana SL | 28109 Madrid | 2008 |
| Knutsen Oas Management AS | Haugesund | 2006 |
| Knutsen Shuttle Tankers 13 AS | Haugesund | 2011 |
| Knutsen Shuttle Tankers 14 AS | Haugesund | 2011 |
| Knutsen Shuttle Tankers 15 AS | Haugesund | 2011 |
| Knutsen Shuttle Tankers 19 AS | Haugesund | 2012 |
| Knutsen Shuttle Tankers 3 AS | Haugesund | 2010 |
| Knutsen Shuttle Tankers Pool AS | Haugesund | 2000 |
| Knutsen Shuttle Tankers Xii AS | Haugesund | 2007 |
| Knutsen Tankers 3 AS | Haugesund | 2008 |
| Knutsen Technology AS | Haugesund | 2007 |
| Knutsen Transport AS | Kviby | 1993 |
| Knutsen Voc AS | Haugesund | 2001 |
| Knutshaug Transport AS | Skien | 2013 |
| Knutzen Transport AS | Løten | 2004 |
| Kob Invest AS | Sandefjord | 2015 |
| Kobbelv Maskin & Transport AS | Engan | 2020 |
| Koc AS | Oslo | 2025 |
| Kocak Transport AS | Oslo | 2023 |
| Kok AS | Oslo | 2017 |
| Kokelv Transport & Maskin AS | Russenes | 2014 |
| Kokkersvold Holding AS | Langangen | 2015 |