| Karmøy Rørlegger Tjenester AS | Construction | 2025 |
| Karmøy Stormarked AS | Wholesale & retail | 2008 |
| Karmøy Trading AS | Wholesale & retail | 2013 |
| Karmøy Trykkeri AS | Manufacturing | 1980 |
| Karmøy Winch AS | Manufacturing | 1999 |
| Karten Holding AS | | 2024 |
| Kebab & Isbar AS | Hospitality | 2018 |
| Ket Holding AS | Real estate | 2012 |
| Keven Hegerland Sola AS | Wholesale & retail | 2020 |
| KGS Lund Invest AS | Real estate | 2007 |
| KH Maritime Service AS | Administrative & support | 2025 |
| Khavita AS | Financial services | 2006 |
| King of Breaks AS | Wholesale & retail | 2024 |
| Kirkeveien 17 AS | Real estate | 2018 |
| Kjøkken Eksperten AS | Manufacturing | 2024 |
| Klæhaugveien 14 AS | Real estate | 2015 |
| Klæhaugveien 14 Holding AS | Real estate | 2021 |
| Kløyvane AS | Professional & scientific | 2021 |
| KM Jørgensen AS | Real estate | 2025 |
| Kob Investment Group AS | | 2026 |
| Koch Subsea Consultancy AS | Professional & scientific | 2024 |
| Kolbeinsen Eiendom AS | Wholesale & retail | 1980 |
| Kolbeinsen Elektrosenter AS | Wholesale & retail | 2009 |
| Kopervik Auto AS | Other services | 1986 |
| Kopervik Bensin Og Storkiosk AS | Wholesale & retail | 1991 |
| Kopervik Bil AS | Wholesale & retail | 2014 |
| Kopervik Bilsenter - Karosseri AS | Other services | 2023 |
| Kopervik Blomsterdesign AS | Wholesale & retail | 2016 |
| Kopervik Bruktbil Da | Wholesale & retail | 1995 |
| Kopervik Catering AS | Hospitality | 2019 |
| Kopervik Eiendom AS | Real estate | 1993 |
| Kopervik Invest AS | Real estate | 2023 |
| Kopervik Kapitalforvaltning AS | Professional & scientific | 2006 |
| Kopervik Karosseri Eiendom AS | Real estate | 1988 |
| Kopervik Kebab & Isbar AS | Hospitality | 2021 |
| Kopervik Kuldepot AS | Real estate | 1928 |
| Kopervik Legesenter SA | Health & social care | 2002 |
| Kopervik Pizza AS | Hospitality | 2004 |
| Kopervik Ship Invest AS | Transport & logistics | 2002 |
| Kopervik Ship Management AS | Transport & logistics | 2000 |
| Kopervik Shipping AS | Transport & logistics | 1994 |
| Kopervik Taxi AS | Transport & logistics | 2025 |
| Kopparen Gategrill AS | Hospitality | 2018 |
| Kraken Invest AS | Administrative & support | 2017 |
| Krovegen AS | Real estate | 2025 |
| Kvala Arkitekter AS | Professional & scientific | 2006 |
| Kvala Buss & Taxi AS | Transport & logistics | 1998 |
| Kvala Takst AS | Real estate | 2024 |
| Kvalvik Eiendom AS | Real estate | 2016 |
| Kvamme Maskin AS | Administrative & support | 2017 |
| Kvamme Skog AS | Agriculture & fishing | 2018 |
| KVC Invest AS | Manufacturing | 2005 |
| Kvinnesland Invest AS | Financial services | 2009 |
| KW Kapital I AS | | 2017 |
| KW Kapital II AS | | 2017 |
| KW Kapital III AS | | 2017 |
| KW Prosjekt AS | | 2017 |
| L&G Bygg AS | Construction | 2016 |
| L&G Holding AS | | 2025 |
| Laastad Pluss & Minus AS | Professional & scientific | 2017 |
| Lauvås Holding AS | | 2019 |
| Lege Bjørn Rismyhr AS | Health & social care | 1987 |
| Leig Det Holding AS | Arts & recreation | 2013 |
| Leitevegen Eiendom AS | Real estate | 2010 |
| Leknes-Eiendom AS | Real estate | 2005 |
| Lenimentus AS | Information & communication | 2011 |
| LH Naley Holding AS | Wholesale & retail | 2017 |
| Lida AS | Health & social care | 2005 |
| Linove Holding AS | | 2021 |
| LK Handel AS | Wholesale & retail | 2023 |
| Logi Holding AS | Professional & scientific | 2015 |
| Long Invest AS | | 2025 |
| Losen Badstue AS | Real estate | 2023 |
| Lov Holding AS | Real estate | 2023 |
| Mads Åmot AS | Education | 2018 |
| Mait Holding AS | | 2026 |
| Marius G. Jørgensen AS | | 2025 |
| Marpro AS | Professional & scientific | 2018 |
| Martin Sunnanå AS | Construction | 2024 |
| Martin Sunnanå Holding AS | Agriculture & fishing | 2024 |
| Marvin W. Mansour Holding AS | Hospitality | 2022 |
| Mava AS | | 2025 |
| Max Eiendom AS | Real estate | 2001 |
| Medi Norway AS | Wholesale & retail | 1993 |
| Mediatech Ans | Information & communication | 1988 |
| Mega Grill Kopervik AS | Hospitality | 2012 |
| Meglerhuset Rele Karmøy AS | Real estate | 2019 |
| Merefolk AS | Administrative & support | 2018 |
| Mes Eiendom AS | Real estate | 2015 |
| MH Drift Og Forvaltning AS | Financial services | 2015 |
| MH Eiendomsinvestering AS | Financial services | 2015 |
| MHG Equipment AS | Administrative & support | 2000 |
| Midgard Management AS | Wholesale & retail | 1999 |
| Midgard Marine AS | Transport & logistics | 2016 |
| Miljø & Sikkerhet AS | Wholesale & retail | 2020 |
| Mimosa Dekor Ans | Wholesale & retail | 1995 |
| Mjåseth Invest AS | Real estate | 2017 |
| MKJ Danielsen Eiendom AS | Real estate | 2020 |
| Moderne Bygg 1 AS | Real estate | 2014 |
| Modernestil AS | Professional & scientific | 2023 |