| Kautokeino Rehabsenter AS | Kautokeino | 2017 |
| Kaveh Rashidi AS | Oslo | 2022 |
| Kavi Holding AS | Trondheim | 2022 |
| Kavli & Angvik Ans | Trondheim | 2006 |
| Kayagni AS | Alta | 2021 |
| Kayser Psykologtjenester AS | Nordfjordeid | 2005 |
| Kaza Bodywork AS | Bærums Verk | 2020 |
| KB Helse AS | Stange | 2020 |
| KBH Invest AS | Oslo | 2021 |
| Kbs-Ent AS | Tønsberg | 2009 |
| KBW Holding AS | Oslo | 2018 |
| KD Legetjeneste AS | Trondheim | 2019 |
| Kdkristensen AS | Stavanger | 2020 |
| KDR Holding AS | Ålesund | 2021 |
| KDS Helland AS | Bergen | 2026 |
| Keag Holding AS | Vesterøy | 2011 |
| Keharo AS | Hundvåg | 2020 |
| Kelk AS | Charlottenlund | 2024 |
| Keloisa Renhold AS | Oslo | 2019 |
| Kenguru AS | Oppegård | 2023 |
| Kenneth Sagedal AS | Hvalstad | 2005 |
| Kentlands Holdning AS | Bergen | 2023 |
| Kenzo Invest AS | Trondheim | 2018 |
| Kera Dental AS | Oslo | 2021 |
| Kesmic AS | Bergen | 2021 |
| Ketil Sten AS | Inderøy | 2009 |
| KFK Helse AS | Rygge | 2018 |
| KGH Helse AS | Grimstad | 2024 |
| Khair-Un-Nass | Pk-49600 Jhelup | 2015 |
| Khan Dental AS | Oslo | 2024 |
| Khan Helse AS | Jessheim | 2026 |
| Khoff AS | Gjøvik | 2014 |
| Ki-Ka-Ma Helse AS | Alta | 2014 |
| Kia Tørnstrøm | Oslo | 2014 |
| Kibsgård Manuellterapi AS | Bodø | 2014 |
| Kickstart Health AS | Oslo | 2022 |
| Kievra AS | Tana | 1991 |
| Kiil Hestnes Holding AS | Krokstadelva | 2011 |
| Kildahl Holding AS | Bremnes | 2024 |
| Kilden Da | Kragerø | 1999 |
| Kilden Kiropraktikk AS | Vikersund | 2021 |
| Kildevangen Kurs Og Kompetansesenter AS | Skreia | 2017 |
| Kilen Fysioterapi Og Akupunktur AS | Sandefjord | 2025 |
| Kilen Kiropraktikk AS | Sandefjord | 2020 |
| Kilen Legekontor Tønsberg Da | Tønsberg | 2025 |
| Kilen Legesenter Da | Sandefjord | 2007 |
| Kilen Tannlegesenter AS | Sandefjord | 2002 |
| Kim Stian Olsen AS | Sem | 2012 |
| Kind People AS | Stavanger | 2015 |
| Kinesiolog Eidhammer AS | Rykkinn | 2021 |
| King Kiropraktor AS | Kristiansand S | 2014 |
| King Kong Kardio AS | Oslo | 2021 |
| Kinn Helse AS | Sandnes | 2025 |
| Kinoa Ly AS | Vinterbro | 2026 |
| Kinoa Tiltak AS | Ski | 2018 |
| Kip Medisin AS | Oslo | 2018 |
| Kipervika Legesenter AS | Ålesund | 2001 |
| Kipervika Tannklinikk AS | Ålesund | 2019 |
| Kippernes Kiropraktikk AS | Molde | 2020 |
| Kirkegata Legesenter AS | Levanger | 2023 |
| Kirkenes Fysikalske Institutt AS | Kirkenes | 2015 |
| Kirkenes Hud Og Fotklinikk AS | Kirkenes | 2013 |
| Kirkenes Legesenter AS | Kirkenes | 2000 |
| Kirkens Bymisjon Arbeidsmarkedstiltak AS | Drammen | 2021 |
| Kirketorget 5 AS | Kongsberg | 2013 |
| KIRO1 AS | Levanger | 1998 |
| KIRO1 Holding AS | Levanger | 2005 |
| KIRO1 Stjørdal AS | Stjørdal | 2009 |
| Kirodan AS | Søgne | 2013 |
| Kiropractic AS | Ottestad | 2023 |
| Kiropraktikk I Sentrum AS | Drammen | 2008 |
| Kiropraktikk Og Helse for Alle AS | Ulsteinvik | 2012 |
| Kiropraktikk Og Helse for Alle Hornindal AS | Hornindal | 2014 |
| Kiropraktisk Center Sandvika AS | Asker | 2006 |
| Kiropraktisk Klinikk AS | Dilling | 2000 |
| Kiropraktisk Klinikk Da | Moss | 1999 |
| Kiropraktisk Klinikk Da | Moss | 2004 |
| Kiropraktisk Senter AS | Tønsberg | 2025 |
| Kiropraktisk Senter Stavanger AS | Stavanger | 2005 |
| Kiropraktor & Helse AS | Stabekk | 1990 |
| Kiropraktor Akutten AS | Sandnes | 2015 |
| Kiropraktor Amundsen AS | Oslo | 2022 |
| Kiropraktor Andreas Kolsvik AS | Ranheim | 2012 |
| Kiropraktor Ann-Kristin Brodin AS | Halden | 2020 |
| Kiropraktor Anne Moksness AS | Arendal | 2015 |
| Kiropraktor AS | Gurskøy | 2001 |
| Kiropraktor Asmyhr AS | Lillestrøm | 2020 |
| Kiropraktor Bernt Schjetne AS | Trondheim | 2000 |
| Kiropraktor Brumunddal AS | Brumunddal | 2003 |
| Kiropraktor Daniel Dyrstad AS | Hafrsfjord | 2019 |
| Kiropraktor Elling Jørgensen AS | Duken | 2012 |
| Kiropraktor Espen Holth AS | Oslo | 2019 |
| Kiropraktor Fallsen AS | Alta | 2023 |
| Kiropraktor Gjøvik AS | Gjøvik | 2015 |
| Kiropraktor Glenn Angelsen AS | Trondheim | 2013 |
| Kiropraktor Gustav Sellergren Ans | Tønsberg | 1990 |
| Kiropraktor Hamar AS | Brumunddal | 2020 |
| Kiropraktor Hans Christian Eriksen AS | Drammen | 2014 |
| Kiropraktor Helene Mejdell AS | Oslo | 2021 |
| Kiropraktor Helge Haavaag AS | Harstad | 2017 |