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| Krey Båtservice AS | Larvik | 2021 |
| Krico Norway AS | Kongsberg | 1999 |
| Krifo Fisk Og Fiskmat AS | Roan | 2018 |
| Kringelen Maskinservice AS | Sortland | 2019 |
| Kringla AS | Svolvær | 2012 |
| Kringla Holding AS | Svolvær | 2012 |
| Kringleveien Eiendom AS | Kyrksæterøra | 1989 |
| Kringsjå Investering AS | Bryne | 1995 |
| Kris Montering AS | Klavestadhaugen | 2025 |
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| Kristiania Verksted AS | Oslo | 2021 |
| Kristiansand Bruktbåt AS | Søgne | 2015 |
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| Kristiansand Hydraulikk & Maskinering AS | Kristiansand S | 2016 |
| Kristiansen Allsidige AS | Høvåg | 2022 |
| Kristiansen Betongpumping AS | Skien | 1995 |
| Kristiansen Mat AS | Gjøvik | 2020 |
| Kristiansund Fiskeindustri AS | Kristiansund N | 1994 |
| Kristiansund Industriservice AS | Kristiansund N | 2005 |
| Kristiansund Mekaniske AS | Kristiansund N | 1990 |
| Kristin Bergheim AS | Tromsø | 2019 |
| Kristin Grøtvedt AS | Svinndal | 2023 |
| Kristines Franske Fristelser AS | Sandvika | 1998 |
| Kristo Rep AS | Moss | 2013 |
| Kristoffersen Salg Og Service AS | Sandefjord | 2024 |
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| Krivest Oü | Ee-13522 Tallinn | 2014 |
| Krivi-Vev AS | Tingvoll | 2007 |
| KRJ Holding AS | Gressvik | 2005 |
| Krmy AS | Oslo | 2022 |
| Kro Produksjon AS | Oslo | 1983 |
| Kroeze Interior Projects B.V Norway Branch Nuf | 7575Ee Oldenzaal | 2016 |
| Krog Maskin AS | Hunndalen | 2011 |
| Krogsrud Marine Service AS | Oslo | 1994 |
| Krogstad Og Myhra AS | Tyristrand | 2023 |
| Krogstadfjorden Marina AS | Rolvsøy | 2025 |
| Krokeide Bunad- Og Tradisjonssaum Da | Fana | 2007 |
| Krokens Rep Og Service Da | Hønefoss | 2024 |
| Kronborg Technologies AS | Horten | 2016 |
| Krone Bro Laboratoriet Eiendom AS | Larvik | 2007 |
| Krone Bro Laboratoriet Larvik AS | Larvik | 1994 |
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| Kronos Titan AS | Gamle Fredrikstad | 1988 |
| Kronstein Element AS | Sortland | 2020 |
| Krossfjord Mekaniske AS | Steinsland | 2016 |
| Krossleite Tre SA | Masfjordnes | 2003 |
| Kroton AS | Gressvik | 2012 |
| Kruse AS | Florø | 1994 |
| Krydderhylla Finsnekring Ans | Sarpsborg | 1995 |
| Kryddo AS | Tiller | 1998 |
| Krystal AS | Drammen | 1987 |
| Krzysztof Gamon | Pl-34-606 Swidnik | 2022 |
| Kråke Ans | Oslo | 2004 |
| Kråkeslottet AS | Hemnesberget | 2008 |
| Kråkøy Slakteri AS | Roan | 2003 |
| Krøsen Invest AS | Oppdal | 2005 |
| Krüger Kaldnes AS | Sandefjord | 1989 |
| KS Access Ltd | Ne40 4Ps Low Crawcrook | 2021 |
| Ks-Lab AS | Stavanger | 2026 |
| Ks-Service AS | Evje | 2019 |
| KSK Holding AS | Sola | 2017 |
| KSK Maskinservice AS | Sola | 2017 |
| Kskjørt AS | Kvaløysletta | 2018 |
| KSM AS | Skien | 1996 |
| Ksmv AS | Søgne | 1993 |
| KST Metall AS | Karmsund | 2008 |
| Kubo Greenhouse Projects B.V. Nuf | Nl-2681 Tx Monster | 2009 |
| Kudos Eiendom AS | Birkeland | 2013 |
| Kudos Invest AS | Birkeland | 2013 |
| Kuhlmann & Leuchter AS | Oslo | 2012 |
| Kuka Industries GmbH & Co. KG | De-63785 Obernburg | 2019 |
| Kulinaris AS | Trollåsen | 2002 |
| Kuling Båt AS | Oslo | 2021 |
| Kullmann Holding AS | Oslo | 2002 |
| Kulterud Sag & Høvleri AS | Bagn | 2024 |
| Kulturuthuset AS | Lillehammer | 2020 |
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| Kuraas AS | Narvik | 1997 |
| Kurefjorden Marine AS | Larkollen | 2023 |
| Kurland Invest AS | Kurland | 2005 |
| Kurotek AS | Bodø | 2010 |
| Kursiv Media AS | Lillestrøm | 1999 |
| Kurt Andresen AS | Søgne | 2024 |
| Kurt Hamre AS | Fana | 1986 |
| Kurt Hamre Invest AS | Fana | 2005 |
| Kurtala Green Ammonia AS | Stord | 2024 |
| Kuuma Norge AS | Oslo | 2022 |
| KV Eigedom AS | Fitjar | 2014 |
| Kv-Holding AS | Fitjar | 2014 |
| Kva-Kon AS | Austmarka | 1982 |
| Kvae Da | Oslo | 2017 |
| Kvala Industriservice AS | Haugesund | 2015 |
| Kvalnes Eiendom AS | Tolvsrød | 2004 |
| Kvalvik Smie AS | Nordvågen | 2024 |
| Kvamme Elektro Maskin Service Ans | Alversund | 1999 |
| Kvamme Service AS | Hosteland | 2014 |
| Kvams Glass AS | Horten | 1983 |