| Kalfarveien Fjellside AS | Real estate | 2019 |
| Kanalparken Omsorg AS | Real estate | 2025 |
| Kanz Holding AS | Agriculture & fishing | 2018 |
| Kappe Bygg AS | Construction | 2026 |
| Kappy AS | Wholesale & retail | 2025 |
| Kardevaldermo AS | Administrative & support | 2005 |
| Karl Davids Group AS | Real estate | 2022 |
| Karlsen Trafikkskole AS | Education | 2014 |
| Karlstrom AS | | 2023 |
| Karlsøy Entreprenør AS | Administrative & support | 2004 |
| Karunacare AS | Administrative & support | 2021 |
| Kasa Holding AS | | 2025 |
| Kasseriet Holding AS | Manufacturing | 2014 |
| Kathka AS | Real estate | 2005 |
| Katma AS | Arts & recreation | 2026 |
| Kaupaloki AS | Professional & scientific | 2013 |
| Kben AS | Real estate | 2019 |
| Kbi Invest AS | | 2024 |
| Ke-Invest AS | Education | 2022 |
| Kebab King Da | Hospitality | 2006 |
| Kebab Master AS | Hospitality | 2021 |
| Keenious AS | Information & communication | 2017 |
| Keinapel Holding AS | Real estate | 2012 |
| Keny Holding AS | | 2021 |
| KGS Systemer AS | Wholesale & retail | 1993 |
| KGT. 56 Narvik AS | Real estate | 2019 |
| KHH Invest AS | Financial services | 2005 |
| Kibsgaard Eiendom AS | Real estate | 2017 |
| Kimhan Holding AS | | 2023 |
| Kine Østnes Hansen Holding AS | | 2022 |
| Kinekunst AS | Arts & recreation | 2025 |
| King Kong AS | Financial services | 2022 |
| Kinnar Holding AS | Administrative & support | 2025 |
| Kinsea Lead Discovery AS | Professional & scientific | 2022 |
| Kinspire Holding AS | | 2025 |
| Kioskdrift Guttormsen AS | Wholesale & retail | 2023 |
| Kirkegata 10 AS | Real estate | 1994 |
| Kirkegata 8 AS | Real estate | 2005 |
| Kirkegårdsveien 8 AS | Real estate | 2009 |
| Kirkevask Da | Administrative & support | 2018 |
| Kitteh AS | Wholesale & retail | 2025 |
| KJ Management AS | Professional & scientific | 2023 |
| Kjalo Invest AS | | 2023 |
| Kjektåleie AS | Administrative & support | 2020 |
| Kjell H.Nilsen AS | Construction | 2005 |
| Kjell Rotvold Eiendom AS | Real estate | 1990 |
| Kjelstrup Consulting AS | | 2021 |
| Kjernehuset Da | Wholesale & retail | 1998 |
| Kjøkken Service AS | Wholesale & retail | 2014 |
| Kjøkkendrift No 1 Jekta AS | Wholesale & retail | 2012 |
| Kjøkkensjefen AS | Hospitality | 2019 |
| Kjølen AS | Real estate | 2005 |
| Kjørekontoret AS | Transport & logistics | 2006 |
| Kjøttmeis AS | | 2025 |
| KKH Holding AS | | 2018 |
| Klart AS | Administrative & support | 2020 |
| Klaudiussen Holding AS | | 2026 |
| Klausen Eiendom AS | Real estate | 2003 |
| Klauv Og Rake Da | Agriculture & fishing | 2022 |
| Kleveland Eiendommer AS | Real estate | 2019 |
| Kleven Utleie AS | Real estate | 2020 |
| Klik Holding AS | | 2024 |
| Klinikk 8 AS | Health & social care | 2025 |
| KLINIKK24 AS | Health & social care | 2012 |
| Klipperiet AS | Other services | 1986 |
| KLJ Invest AS | Real estate | 2022 |
| Klotz Engineering AS | Professional & scientific | 2025 |
| Kløver 2 AS | | 2025 |
| Kløvereie AS | Information & communication | 2016 |
| Kløvervegen 15 AS | Real estate | 2020 |
| Kløvervegen 9 AS | Real estate | 2017 |
| Kløverveien 12 AS | Real estate | 2010 |
| Kløverveien 17 AS | Real estate | 1997 |
| KM Eiendom Bergen AS | Real estate | 2011 |
| KM Eiendom Holding AS | Real estate | 2021 |
| KM Eiendom Stavanger AS | Real estate | 2006 |
| KM Eiendom Tromsø AS | Real estate | 2010 |
| KM Vekstpartner AS | Professional & scientific | 2026 |
| Knitre AS | Information & communication | 2017 |
| Knoll Og Tott Tromsø AS | Hospitality | 2024 |
| Kodeks Spill & Hobby AS | Wholesale & retail | 2026 |
| Koi of Scandinavia Ans | Manufacturing | 2025 |
| Koko Film AS | Information & communication | 2014 |
| Kom Bygg Og Service AS | Construction | 2025 |
| Koment Inord AS | Professional & scientific | 2020 |
| Kommunikasjon Og Ledelse Geir Håvard Hanssen AS | Professional & scientific | 2017 |
| Kompetansesenteret for NLP AS | Professional & scientific | 2009 |
| Komplettkurs AS | Education | 2019 |
| Komsikomsa Da | Arts & recreation | 2006 |
| Konane Invest AS | Professional & scientific | 2021 |
| Kongens Gate 38 Narvik AS | Real estate | 2021 |
| Kongsbakken Tannklinikk AS | Health & social care | 2009 |
| Kongsberg Satellite Services AS | Information & communication | 2001 |
| Konrad Holding AS | | 2020 |
| Kontex AS | Information & communication | 2025 |
| Kontorutleie S4 AS | Real estate | 2012 |
| KOOP22 AS | Real estate | 2022 |
| Korsberg Holding AS | Real estate | 2017 |
| Koseverden AS | Hospitality | 2013 |
| KPH Media AS | Professional & scientific | 2018 |