| K Furuseth Holding AS | | 2005 |
| Kahemai Invest AS | Real estate | 2007 |
| Kaizen Trading AS | Professional & scientific | 2011 |
| Kameramann AS | Information & communication | 2010 |
| Kanutten AS | Wholesale & retail | 1993 |
| Kanutten Holding AS | Wholesale & retail | 2005 |
| Karl B Møllerstad AS | Wholesale & retail | 1969 |
| Karlssons Konsult Tjenster AS | Professional & scientific | 2022 |
| Kayakpartner AS | Administrative & support | 2026 |
| KB El AS | Construction | 2024 |
| Kelu Holding AS | Administrative & support | 2020 |
| Kelu Invest AS | Administrative & support | 2024 |
| Kepler Capital AS | | 2022 |
| Keser AS | Wholesale & retail | 2010 |
| KF Goodwill AS | Education | 2005 |
| Kgi AS | Professional & scientific | 2007 |
| KH Invest Holding AS | | 2022 |
| Khadeer AS | Wholesale & retail | 2019 |
| Khan Grill & Pizza AS | Hospitality | 2026 |
| Khan Helse AS | Health & social care | 2026 |
| Kilowatt Film Ans | Information & communication | 2000 |
| Kim Chi Vy Cafe AS | Hospitality | 2012 |
| Kimper Invest AS | Real estate | 2005 |
| Kinelycke AS | Wholesale & retail | 2023 |
| Kiropraktorgruppen SA | Information & communication | 2012 |
| Kiss Holding AS | Professional & scientific | 2019 |
| Kjbp Invest AS | Professional & scientific | 2018 |
| Kjeld Stubs Veg 4 AS | Real estate | 2018 |
| Kjell Dragnes Infopress | Arts & recreation | 2015 |
| Kjell V Invest AS | Real estate | 2015 |
| Kjos Mjølk Da | Agriculture & fishing | 2008 |
| Kjøkkensenteret Jessheim AS | Wholesale & retail | 1995 |
| Kjøling Service AS | Construction | 2024 |
| Kjørli Invest AS | | 2021 |
| Klima Konsult Da | Wholesale & retail | 2001 |
| Klinikk Esthetica AS | Other services | 2019 |
| Knerten Holding AS | | 2022 |
| Kojelia AS | | 2021 |
| Konferanse- Og Mediaspesialisten AS | Professional & scientific | 2018 |
| Konterud AS | Other services | 1999 |
| Konterud Eiendom AS | Real estate | 1980 |
| Konterud Holding AS | Other services | 2005 |
| Korsmo Eiendom AS | Real estate | 1972 |
| Korsmo Holding AS | Real estate | 2005 |
| KP Utvikling AS | Real estate | 2024 |
| KR. Bygg Østfold AS | Real estate | 2006 |
| KR. Invest AS | Professional & scientific | 2004 |
| KR. Revisjon AS | Professional & scientific | 2006 |
| Kreativ Kjerne AS | Professional & scientific | 2026 |
| Kremtjenester AS | Arts & recreation | 2017 |
| Kristensen & Bue Transport AS | Transport & logistics | 2013 |
| KS Hogst Og Linjerydding AS | Agriculture & fishing | 2024 |
| Ksa Consulting AS | Information & communication | 2026 |
| Kte Group AS | | 2024 |
| Kuhn Center Norge AS | Wholesale & retail | 2019 |
| Kultur Og Uteliv Norge AS | Professional & scientific | 2024 |
| Kunnskapskuben AS | Wholesale & retail | 2026 |
| Kuuma AS | Financial services | 2014 |
| KV Anlegg AS | Construction | 2023 |
| Kvartal 22 Lillehammer AS | Real estate | 2018 |
| Kveldsro Invest AS | Wholesale & retail | 2007 |
| Kvernstad AS | Other services | 2022 |
| KVM Invest AS | Wholesale & retail | 2019 |
| Kål AS | Professional & scientific | 2010 |
| Kåsa M Holding AS | | 2026 |
| L & E Holding AS | Health & social care | 2022 |
| L. Wangen Holding AS | | 2021 |
| L.Aga Invest AS | | 2023 |
| La Voiture AS | Information & communication | 2019 |
| Laban Invest AS | Arts & recreation | 2021 |
| Laga Consult AS | Information & communication | 2018 |
| Lagerhuset AS | Real estate | 2021 |
| Lagnettverk AS | Health & social care | 2013 |
| Laham Holding AS | | 2025 |
| Lakkfix AS | Other services | 2025 |
| Landell Holding AS | | 2025 |
| Langberget Bråthen AS | Real estate | 2019 |
| Langelandsfjellet Eiendom AS | Real estate | 2001 |
| Langelandsfjellet Holding AS | Real estate | 2005 |
| Langelandskollen AS | Real estate | 2016 |
| Larth AS | Real estate | 2015 |
| Layer Nine AS | Information & communication | 2025 |
| Layered Security AS | Professional & scientific | 2025 |
| Layertwo AS | Professional & scientific | 2024 |
| Layher AS | Wholesale & retail | 2004 |
| Layla GmbH & Co. KG | Real estate | 2008 |
| LD Invest AS | Real estate | 2005 |
| Le'Ganz Jessheim AS | Wholesale & retail | 2008 |
| Legekontoret Inge Nessiøy AS | Health & social care | 2000 |
| Legen Smart Invest AS | Construction | 2021 |
| Leiknes Group AS | | 2025 |
| Leiknes Mesterbygg AS | Construction | 2025 |
| Leiv AS | Information & communication | 2025 |
| Len-Invest AS | Real estate | 2020 |
| Lenur Eiendom AS | Real estate | 2018 |
| Levellia AS | Professional & scientific | 2026 |
| Levende Liv AS | Arts & recreation | 2022 |
| Lexcorp AS | Real estate | 2006 |
| Lhold T AS | | 2026 |
| Lhold TJW AS | | 2026 |