| Kenlin Ans | Real estate | 2013 |
| Kenna Holding AS | | 2023 |
| Kenneth Lynne AS | Information & communication | 2019 |
| Kenneth Løvold Invest AS | Real estate | 2020 |
| Kenneth Sunde Invest AS | | 2019 |
| Kenneths AS | | 2025 |
| Kenor Safaris Ltd Norsk Avdeling Av Utenlandsk Foretak Nuf | Administrative & support | 2000 |
| Kensimo Konsult AS | Real estate | 2015 |
| Kensington AS | Real estate | 2019 |
| Kent Konsulent AS | Financial services | 2018 |
| Kentaur Consult AS | Professional & scientific | 2020 |
| Kentech AS | Information & communication | 2020 |
| Kentra Invest AS | | 2021 |
| Kentron AS | Professional & scientific | 2012 |
| Kenwood Electronics Belgium N.V. | Wholesale & retail | 1997 |
| Kenwood Electronics Europe BV | Wholesale & retail | 2002 |
| Kenzoll Nordic AS | | 2024 |
| Keo Card Invest Norge AS | Construction | 2010 |
| Keo Invest A/S | | 1988 |
| Kep Capital AS | | 2020 |
| Kepi Blanc AS | Professional & scientific | 2015 |
| Kepler Cheuvreux Oslo Nuf | Financial services | 2017 |
| Kepush AS | Professional & scientific | 2014 |
| Ker Holding AS | Real estate | 2005 |
| Kera Dental AS | Health & social care | 2021 |
| Kera Eiendom AS | Real estate | 2024 |
| Kera Isolering AS | Construction | 2020 |
| Kera Utvikling AS | Real estate | 2021 |
| Kerabox AS | Wholesale & retail | 2024 |
| Kerag AS | | 1983 |
| Keramikkbokstaver AS | Wholesale & retail | 2026 |
| Keramikkmakk AS | Manufacturing | 2023 |
| Keramikkstøperiet Ans | Manufacturing | 1995 |
| Kerberos AS | Financial services | 2006 |
| Keri Holding AS | | 2024 |
| Kerian AS | Information & communication | 2008 |
| Kerla AS | Professional & scientific | 2005 |
| Kerla Interim AS | Professional & scientific | 2023 |
| Kermes & Saffron AS | Wholesale & retail | 2016 |
| Kerno AS | Construction | 2016 |
| Kero Labtrans AS | Transport & logistics | 2021 |
| Keroc AS | Construction | 2013 |
| Keroc Holding AS | Construction | 2015 |
| Kersenboom Hansen AS | Professional & scientific | 2021 |
| Kerskers Film AS | Information & communication | 2026 |
| Kersten Holding AS | Real estate | 2022 |
| Kerwin AS | Financial services | 2012 |
| Kes AS | Transport & logistics | 1989 |
| Kesco Installasjon AS | Construction | 2000 |
| Kesedilj AS | | 2024 |
| Kesh AS | Wholesale & retail | 2024 |
| Kesho AS | | 2022 |
| Keska AS | Real estate | 2017 |
| Keskinäinen Vakuutusyhtiö Tapiola | Water & waste | 2007 |
| Kesm AS | | 2025 |
| Kess Investment AS | Real estate | 2011 |
| Ketal AS | | 2019 |
| Kethees Jewellery AS | Wholesale & retail | 2022 |
| Ketil Iwe Thorsteinsen Holding AS | Financial services | 2018 |
| Ketils Bygg & Boligservice AS | Construction | 2015 |
| Ketina Eiendom AS | Real estate | 2014 |
| Ketl AS | | 2026 |
| Ketolainen Transport Ltd Nuf | Administrative & support | 2016 |
| Ketoro Netthandel AS | Wholesale & retail | 2022 |
| Keu Rønningen Tunet AS | Real estate | 2016 |
| Keul Holding AS | | 2021 |
| Kevemo AS | Financial services | 1997 |
| Kevers AS | Real estate | 2005 |
| Kevin Bergeas | Wholesale & retail | 2012 |
| Kevin Eiendom Invest AS | Real estate | 2009 |
| Kevin Holding AS | Real estate | 2019 |
| Kevin Vågenes AS | Arts & recreation | 2019 |
| Kevinm AS | Information & communication | 2020 |
| Kevlar AS | | 2017 |
| Kevlar Eiendom AS | | 2017 |
| Kevlar Invest AS | | 2021 |
| Kew Invest AS | Real estate | 2019 |
| Key Account Gruppen AS | Professional & scientific | 2020 |
| Key Account Verdi AS | | 2025 |
| Key Accounting Partners AS | Professional & scientific | 2022 |
| Key Arkitekter AS | Professional & scientific | 2010 |
| Key Butler AS | Real estate | 2018 |
| Key Butler X Lotel AS | Hospitality | 2016 |
| Key Corporate Capital Inc | | 1998 |
| Key Digital Europe AS | Information & communication | 2017 |
| Key Figures Management & Analysis AS | Information & communication | 2022 |
| Key Holder AS | | 2024 |
| Key Holding AS | | 2026 |
| Key Holdings Da | | 2007 |
| Key Investments AS | Real estate | 2021 |
| Key Logistics AS | Wholesale & retail | 2023 |
| Key People AS | Professional & scientific | 2011 |
| Key Player AS | Information & communication | 2021 |
| Key Trafikkskole AS | Education | 2014 |
| Key Transport & Flyttebyrå AS | Transport & logistics | 1976 |
| Key Value Holding AS | Information & communication | 2023 |
| Keyback Nøkkelbrikker AS | Administrative & support | 1991 |
| Keyfree AS | Professional & scientific | 2021 |
| Keyguides AS | Information & communication | 2016 |
| Keyhole Aps Nuf | Financial services | 2025 |