| Kraftprosessen AS | Oslo | 2013 |
| Kragerø Legesenter AS | Kragerø | 2024 |
| Kragerøtannlegene AS | Kragerø | 2015 |
| Kragskogen Legesenter Da | Oslo | 2016 |
| Krambua Legesenter Da | Bergen | 2004 |
| Kransen AS | Kongsberg | 2018 |
| Kransen Tannlegesenter AS | Moss | 2012 |
| Krapfoss Industrier AS | Moss | 1975 |
| Kravik Gjelstad AS | Tønsberg | 2022 |
| Krbs AS | Leknes | 2020 |
| Kreativ Barnevernspedagog Elin AS | Espa | 2023 |
| Kreativ Familiebistand AS | Porsgrunn | 2012 |
| Kreativ Omsorg AS | Fredrikstad | 2018 |
| Kreative Krefter AS | Kolbotn | 2006 |
| Kreativlogoped AS | Lillestrøm | 2022 |
| Kreftklinikken AS | Oslo | 2020 |
| Kreftkompasset AS | Lillestrøm | 2018 |
| Kreik Invest AS | Verdal | 2009 |
| Krey AS | Haugesund | 2018 |
| Krima Helse AS | Stavanger | 2021 |
| Kringsjå Fysioterapi Da | Laksevåg | 2016 |
| Kringsjåklinikken Da | Oslo | 2010 |
| Krinvest Holding AS | Hammerfest | 2021 |
| Krise AS | Tiller | 2018 |
| Kriskofysio AS | Klepp Stasjon | 2024 |
| Kristen Hauge AS | Fyllingsdalen | 2015 |
| Kristian Krogstad Holding AS | Harstad | 2024 |
| Kristianbo AS | Råde | 2026 |
| Kristiansand Akupunkturklinikk AS | Kristiansand S | 2016 |
| Kristiansand Hjertepraksis DR. P.S.Munk AS | Søgne | 2020 |
| Kristiansand Hudlegeklinikk AS | Kristiansand S | 2024 |
| Kristiansand Naturterapi AS | Kristiansand S | 2016 |
| Kristiansand Øre-Nese-Hals AS | Kristiansand S | 2001 |
| Kristiansen Håvard Fysioterapi AS | Sandefjord | 1996 |
| Kristiansund Felles Bedriftshelsetjeneste SA | Kristiansund N | 1987 |
| Kristiansund Idrettskompetansesenter AS | Kristiansund N | 2018 |
| Kristiansund Sjømannslegekontor AS | Kristiansund N | 2019 |
| Kristin Grefberg AS | Rud | 2021 |
| Kristina Klinikken AS | Horten | 2017 |
| Kristine Green Sandvik, Manuellterapeut Og Idrettsfysioterapeut AS | Oslo | 2019 |
| Kristine Skjetne AS | Levanger | 2018 |
| Kristine Tannklinikk AS | Myre | 2013 |
| Kristines Gofot AS | Eidsvoll | 2016 |
| Kristines Hud- Og Fotklinikk AS | Færvik | 2024 |
| Kristnipo AS | Bergen | 2016 |
| Kristoffer Finn Hansen Kiropraktikk AS | Asker | 2017 |
| Kriwil AS | Oslo | 2023 |
| KRJ Eiendom AS | Stavanger | 2010 |
| Krogedal's AS | Vennesla | 2025 |
| Kroken Legekontor AS | Krokelvdalen | 2007 |
| Krokket AS | Oslo | 2026 |
| Krole AS | Oslo | 2009 |
| Kron Dental AS | Råde | 2021 |
| Kron Dental Ullevaal Stadion AS | Oslo | 1991 |
| Kronlia Holding AS | Bodø | 2005 |
| Kropp Og Helseklinikken AS | Gjøvik | 2005 |
| Kropp Og Sjel Stavanger Ans | Stavanger | 2008 |
| Kroppen - Psykomotorisk Fysioterapeut Line Brun Wilhelmsen AS | Isdalstø | 2021 |
| Kroppen Fysioterapi AS | Tønsberg | 2020 |
| Kroppen Vet AS | Hagan | 2025 |
| Kroppskontroll AS | Oslo | 2019 |
| Kroppsverket AS | Oslo | 2007 |
| Kropsterapeut Lene Ege Nuf | Dk-2500 Valby | 2025 |
| Krossen Legekontor AS | Kleppe | 1990 |
| Krox Nuf | Oslo | 2013 |
| KRS Helse AS | Kristiansand S | 2022 |
| Kruse Care AS | Tranby | 2019 |
| Krut Holding AS | Eivindvik | 2021 |
| KRV Holding AS | Gamle Fredrikstad | 2020 |
| Kryss AS | Oslo | 2025 |
| Krystallen AS | Trondheim | 2014 |
| Kråkerøy Fysioterapi Da | Kråkerøy | 1972 |
| Kråkerøy Legesenter AS | Kråkerøy | 2007 |
| Kråkerøytannlegene AS | Kråkerøy | 2013 |
| Krøier Holding AS | Tønsberg | 2021 |
| Krølle AS | Narvik | 2025 |
| KSV AS | Haugesund | 2020 |
| KT Vitalis AS | Langhus | 2026 |
| KTJ AS | Kristiansand S | 2011 |
| Ktmk Holding AS | Rasta | 2019 |
| KTT Invest AS | Sofiemyr | 2017 |
| Kubberød AS | Rygge | 2013 |
| Kuben 62 + AS | Oslo | 2011 |
| Kudos Helse AS | Nyborg | 2018 |
| Kudos Investeringskompani AS | Kristiansand S | 2016 |
| Kuhry Holding AS | Trondheim | 2016 |
| Kullberg AS | Kråkerøy | 2015 |
| Kulseng Holding AS | Mo I Rana | 2021 |
| Kulturformidling Romfolket AS | Kongsvinger | 2019 |
| Kulturhuset Legesenter Da | Grimstad | 2017 |
| Kultursone AS | Porsgrunn | 2014 |
| Kumar-Kiblawi AS | Oslo | 2023 |
| Kurbadets Fysikalske Institutt AS | Oslo | 1998 |
| Kuri AS | Lillehammer | 2020 |
| Kurskonsulentene AS | Krokstadelva | 2012 |
| Kurts Fysikalske Institutt AS | Hansnes | 1999 |
| Kuvaas Holding AS | Holmestrand | 2023 |
| KV Majorstuen AS | Oslo | 2014 |
| Kvadraturen Fysikalske Eiendom AS | Kristiansand S | 1994 |
| Kvale Holding AS | Søreidgrend | 2023 |