| Kafé Fika AS | Transport & logistics | 2024 |
| Kai Hansen Trykkeri Haugalandet AS | Professional & scientific | 2002 |
| Kaigata 1 Bar AS | Hospitality | 2024 |
| Kaigata 6 AS | Real estate | 2022 |
| Kajo AS | Real estate | 1995 |
| Kaldheim Holding AS | | 2019 |
| Kalinka Nails AS | Other services | 2013 |
| Kalland AS | Construction | 2006 |
| Kalland Glass Og Tre AS | Construction | 2011 |
| Kalleberg Tekstiltrykk AS | Manufacturing | 1987 |
| Kalleberg Utleie Ans | Real estate | 1995 |
| Kallekodt Construction AS | Construction | 2025 |
| Kallekodt Invest AS | | 2025 |
| Kallevik & Partners AS | Professional & scientific | 2018 |
| Kalo Eiendom AS | Real estate | 2024 |
| Kapit AS | Wholesale & retail | 2015 |
| Kapp Eiendom AS | Real estate | 2013 |
| Kara AS | Wholesale & retail | 2019 |
| Karcon AS | Real estate | 2021 |
| Kardialogic AS | Professional & scientific | 2006 |
| Kargro AS | Arts & recreation | 2013 |
| Karina Lange AS | Professional & scientific | 2021 |
| Karmsund Adventure Group AS | Administrative & support | 1999 |
| Karmsund Havn Eiendom AS | Real estate | 2018 |
| Karmsund Kapital AS | Administrative & support | 1999 |
| Karmsund Kapital Eiendom AS | Real estate | 1999 |
| Karmsund Kapital Estate AS | Real estate | 2017 |
| Karmsund Kapital Foldrøyhamn AS | Real estate | 2021 |
| Karmsund Kapital Ocean AS | Administrative & support | 2019 |
| Karmsund Kapital Smedasundet AS | Real estate | 2025 |
| Karmsund Kapital SUNDGATA167A AS | Real estate | 2006 |
| Karmsund Lufthavn Invest AS | Transport & logistics | 2018 |
| Karmsund Maskin AS | Real estate | 1991 |
| Karmsund Prosjektutvikling AS | Professional & scientific | 2025 |
| Karmsund Redskap AS | | 2026 |
| Karmsund Taxi AS | Transport & logistics | 2022 |
| Karmsund Våtbulkterminal AS | Transport & logistics | 2021 |
| Karmsund Wind AS | Real estate | 2023 |
| Karmsundgata 174 AS | Real estate | 2024 |
| Karmsundgata Senter AS | Real estate | 1966 |
| Karmsundgaten 192 AS | Real estate | 2001 |
| Karmsundgaten 77 AS | Real estate | 1988 |
| Karmsundgt. 58 AS | Real estate | 1990 |
| Karmsundsgaten Mediahus AS | Real estate | 2007 |
| Karmsundsgaten Næringspark AS | Real estate | 2007 |
| Karmsundsgaten Parkering AS | Real estate | 2007 |
| Karmøy Laks AS | Manufacturing | 2023 |
| Karmøy Taxi AS | Transport & logistics | 2015 |
| Karmøygaten 86 AS | Real estate | 2005 |
| Kasina AS | | 1989 |
| Kba AS | Administrative & support | 2008 |
| Kbgarvik AS | Professional & scientific | 2023 |
| KBL Invest AS | Financial services | 2012 |
| Kdo Invest AS | Financial services | 2015 |
| Kebab AS | Hospitality | 1987 |
| Kenson Holding AS | | 2022 |
| Kenson Media AS | Professional & scientific | 2021 |
| Ker Consultancy AS | Professional & scientific | 2022 |
| Ker Invest AS | Agriculture & fishing | 2023 |
| Kerba Holding AS | | 2016 |
| Kesipa AS | Financial services | 2021 |
| Keyman Nuf | Information & communication | 2023 |
| KGS 177 AS | Real estate | 2025 |
| KGS 190 AS | Real estate | 2025 |
| Kheg AS | Real estate | 2020 |
| Khelgesen Holding AS | Construction | 2024 |
| KHG Holding AS | Real estate | 2018 |
| Kibri Holding AS | Real estate | 2024 |
| Kick Dansestudio AS | Education | 2018 |
| Kickit AS | Information & communication | 2016 |
| Killingøy Ans | Real estate | 1989 |
| Kinwil AS | Wholesale & retail | 1995 |
| Kirkegaten 136 AS | Real estate | 2014 |
| Kirkegaten 165 AS | Real estate | 2020 |
| Kirkegaten Parkering AS | Real estate | 2022 |
| Kiropraktor Johannes Nygaard Nilsen AS | Health & social care | 2024 |
| Kiropraktorklinikken Haugesund AS | Health & social care | 2005 |
| Kirurg Haugesund AS | Health & social care | 2021 |
| Kiv AS | Manufacturing | 2026 |
| Kjelsnes Eiendom AS | Real estate | 2017 |
| Kjelsnes Holding AS | Construction | 2019 |
| Kjentfolk Vestlandet AS | Administrative & support | 2023 |
| Kjetil Sande Holding AS | Financial services | 2014 |
| Kjetland AS | | 2022 |
| Kjønstadmarka Tomt AS | Real estate | 2023 |
| Kjøpmannsbråtet Eiendom AS | Real estate | 2006 |
| Kjøpmannstjeneste Ans | Professional & scientific | 1989 |
| KL Maskinutleie AS | Construction | 2020 |
| Klart Systems AS | Information & communication | 2025 |
| Kleivastø Invest AS | Real estate | 2006 |
| Klinikk Hausken AS | Health & social care | 2011 |
| Klinikk Jenssen AS | Health & social care | 2021 |
| Klinikk Kolibri AS | | 2026 |
| Klinikk Risanger AS | Health & social care | 2025 |
| Klinikk Selsaas AS | Health & social care | 2018 |
| Klinikk Selsaas Trening AS | Arts & recreation | 2018 |
| Klinikk Strand AS | Health & social care | 2014 |
| Klinikk-Dermamed AS | Other services | 2019 |
| Klink Digital AS | Professional & scientific | 2026 |
| Klok Produksjon AS | Professional & scientific | 2016 |