| Kebabhus AS | Hospitality | 2021 |
| Keel Consult AS | | 2025 |
| Keeptrack AS | Information & communication | 2022 |
| Keiser Wilhelmsgate 34 AS | Real estate | 1996 |
| Keiser Wilhelmsgt 23 AS | Real estate | 2002 |
| Keiseren Frukt Og Grønt AS | Wholesale & retail | 2020 |
| Kel Invest AS | | 2022 |
| Kelo Invest AS | | 2021 |
| Kerotec AS | Professional & scientific | 2019 |
| Ket Bygg AS | Construction | 2019 |
| Ketel Espeseth AS | Construction | 2014 |
| Ketil Pedersen Invest AS | | 2023 |
| Key P1 AS | Financial services | 2022 |
| KG Betong AS | Construction | 2022 |
| KG Modalis AS | | 2025 |
| KH Invest AS | Financial services | 2008 |
| Khelmin AS | | 2020 |
| KHG Invest AS | Real estate | 2016 |
| KHL Finans AS | Financial services | 2010 |
| Kibs Holding AS | | 2022 |
| Kibsgaard-Petersen AS | Professional & scientific | 1979 |
| Kika Eiendom AS | Real estate | 2019 |
| Kile Investments AS | | 2023 |
| Kili Invest AS | | 2021 |
| Kimura AS | | 2021 |
| Kin AS | Hospitality | 2018 |
| Kindra AS | Professional & scientific | 2013 |
| Kindra Consulting AS | Professional & scientific | 2015 |
| Kipervika Eiendom AS | Real estate | 2023 |
| Kipervika Legesenter AS | Health & social care | 2001 |
| Kipervika Tannklinikk AS | Health & social care | 2019 |
| Kipervikg 11 AS | Real estate | 1993 |
| Kipervikgata 15 AS | Manufacturing | 1987 |
| Kirkegata 2 AS | Real estate | 1972 |
| Kirkegt Kiosk & Video Ans | Wholesale & retail | 1999 |
| Kirkesundet Kraft AS | Energy | 2006 |
| Kiropraktor Jørgen Svinø AS | Health & social care | 2017 |
| Kjell Wangberg Larsen Eiendom AS | Real estate | 1990 |
| Kjellberg Holding AS | | 2023 |
| Kjelsund AS | Real estate | 2005 |
| Kjerby AS | Arts & recreation | 2007 |
| Kjerne AS | Real estate | 2011 |
| Kjersem Holding AS | | 2025 |
| Kjerstad AS | Professional & scientific | 2016 |
| Kjetil Sørensen Geiranger AS | Wholesale & retail | 2023 |
| Kjeveortoped Dagfinn Ask AS | Health & social care | 2024 |
| Kjeveortoped Gry Prytz Berset AS | Health & social care | 2021 |
| Kjøpstad IT AS | Information & communication | 2026 |
| KK Mat AS | Hospitality | 2018 |
| KKC AS | Professional & scientific | 2001 |
| Kla Sport AS | Wholesale & retail | 2017 |
| Klar for Fødsel Da | Education | 2026 |
| Klara Esg AS | Information & communication | 2023 |
| Kleiva Holding AS | | 2005 |
| Klikkfiks AS | Information & communication | 2026 |
| Klimainvest AS | Professional & scientific | 2009 |
| Klimaledelse AS | Professional & scientific | 2009 |
| Klipra Barnehage SA | Education | 1987 |
| Klyng Investment AS | | 2024 |
| KLØVER2 Ans | Arts & recreation | 2024 |
| Knekkmetall AS | Manufacturing | 2021 |
| Knfag AS | Real estate | 2020 |
| Knivslipern AS | Other services | 2019 |
| Knock Out Barbershop AS | Other services | 2023 |
| Knut Stoknes AS | Real estate | 1965 |
| Kodelibri AS | | 2022 |
| Kogi Invest AS | | 2020 |
| Koike Europe BV | Wholesale & retail | 2005 |
| Koiwa Sushi AS | Hospitality | 2020 |
| Kolvik Holding AS | Education | 2017 |
| Kolvika Brygge AS | | 2018 |
| Kolvika Eiendom AS | Real estate | 1984 |
| Kolvikhavet AS | Construction | 2006 |
| Komma AS | Financial services | 2005 |
| Komma Kapital AS | | 2025 |
| Kondracki AS | Hospitality | 2020 |
| Kongens Gate 14 Eiendom AS | Real estate | 2019 |
| Kongensgate 24 Ålesund AS | Real estate | 2009 |
| Kongensgate 5 Ålesund Ans | Real estate | 1990 |
| Kongensgt 5 AS | Real estate | 2005 |
| Konnexus Advokatfirma AS | Professional & scientific | 2020 |
| Konseptor AS | Wholesale & retail | 2007 |
| Kontorsystemer AS | Wholesale & retail | 1988 |
| Kontrast Frisør AS | Other services | 2013 |
| Koo Eiendom AS | Real estate | 2010 |
| Kopitrykk Møre Da | Manufacturing | 2000 |
| Koppernæs AS | Real estate | 1918 |
| Koppernæs Eiendom AS | Real estate | 1991 |
| Koppernæs Fasteners AS | Wholesale & retail | 2012 |
| Koppernæs Protein AS | Real estate | 2020 |
| Korsa Eiendom AS | Real estate | 2012 |
| Korsegata 8 AS | Real estate | 2016 |
| Korsegata Tannhelse AS | Health & social care | 2021 |
| Korsen Eiendom Ans | Real estate | 1977 |
| Korsen Eiendom AS | Real estate | 2026 |
| Korsneset Utvikling AS | Real estate | 2021 |
| Korsvegen Eiendom AS | Real estate | 2020 |
| Kortshop AS | Manufacturing | 2007 |
| Kortshop Eiendom AS | Real estate | 2009 |
| Kos Investment AS | | 2011 |