| Jumi Invest AS | Real estate | 2015 |
| Jumpit AS | Information & communication | 2017 |
| Junes Thaimat AS | Hospitality | 2016 |
| Junker Marine AS | Wholesale & retail | 2019 |
| Jussi Holding AS | | 2020 |
| Just Be AS | Manufacturing | 2022 |
| Just Best Padel AS | Administrative & support | 2023 |
| Just Drive Trafikkskole AS | Education | 2021 |
| Just Padel Hånes AS | Real estate | 2022 |
| Justforfun AS | Real estate | 2017 |
| Justvann AS | Water & waste | 2010 |
| Justvik Kolonial AS | Real estate | 1985 |
| Justvik Maskin AS | Construction | 2007 |
| Justøyfamiliens Bibelcamping Drift AS | Hospitality | 2026 |
| Juvelèr AS | Real estate | 1999 |
| JW Regnskap AS | Professional & scientific | 2014 |
| Jwla Stort Selskap AS | Wholesale & retail | 2026 |
| Jåbekk Handelsbygg AS | Real estate | 2021 |
| Jåti AS | Real estate | 2024 |
| Jåtun Land AS | Real estate | 2015 |
| Jæren TM AS | Transport & logistics | 2021 |
| Jø&Pe Holding AS | Professional & scientific | 2005 |
| Jørns Frisører Byen AS | Other services | 2012 |
| Jørns Frisører Østerveien AS | Other services | 2014 |
| Jøss Humor Da | Arts & recreation | 2020 |
| K Albert AS | Other services | 1987 |
| K Arnesen Shipping AS | Transport & logistics | 1981 |
| K Bakke Invest AS | | 2023 |
| K Finnestad Holding AS | | 2025 |
| K Hanssen Import AS | Wholesale & retail | 2017 |
| K Herlofsen Holding AS | Real estate | 2005 |
| K Hodne Invest AS | Real estate | 2017 |
| K J Holding AS | Construction | 2019 |
| K&P Renovering & Bygg Agder AS | Construction | 2026 |
| K-Hus AS | Real estate | 1999 |
| K-L Holding AS | | 2018 |
| K. Larsen Holding AS | Wholesale & retail | 2019 |
| K.Aagedal AS | | 2025 |
| K.K Service AS | Professional & scientific | 2018 |
| K.M. Invest AS | Wholesale & retail | 2017 |
| K.O.S Import AS | Wholesale & retail | 2018 |
| K32 Frisør AS | Other services | 2016 |
| K57 Invest AS | | 2022 |
| K7 Management AS | Professional & scientific | 2017 |
| K7-INVEST AS | Professional & scientific | 2019 |
| Ka 53 Holding AS | Real estate | 2013 |
| Ka Sangvik Invest AS | | 2025 |
| Kaaløy Og Launes Villsaulag Da | Agriculture & fishing | 2022 |
| Kadoro Holding AS | Financial services | 2021 |
| Kaffe&Pasta AS | Wholesale & retail | 2024 |
| Kagemo Invest AS | Real estate | 1995 |
| Kah Capital Invest AS | | 2026 |
| Kai Nerås Holding AS | Information & communication | 2019 |
| Kaimin AS | | 2021 |
| Kakinada AS | Real estate | 2014 |
| Kaldodde AS | Professional & scientific | 2000 |
| Kaldåna Kraft AS | Energy | 2013 |
| Kalkskjæret AS | Real estate | 2005 |
| Kalvehagen Familiebarnehage - Avd Hundremeterskogen Da | Education | 2019 |
| Kalvehagen Familiebarnehage Da | Education | 2002 |
| Kalvøya Avløp SA | Water & waste | 2016 |
| Kama Invest AS | Real estate | 2022 |
| Kambo Eiendom AS | Real estate | 1993 |
| Kambrium AS | Real estate | 2019 |
| Kambrium Holding AS | Real estate | 2019 |
| Kamro AS | Health & social care | 2018 |
| Kamstål Sør AS | Manufacturing | 2018 |
| Kamtra AS | Real estate | 2012 |
| Kanalbyen Eiendom AS | Real estate | 2013 |
| Kanalbyen Partner AS | Real estate | 2013 |
| Kanalbyen Utvikling AS | Real estate | 2010 |
| Kanalhølen Orkla AS | Arts & recreation | 2015 |
| Kanalrens AS | Construction | 2024 |
| Kandal Kraftverk AS | Energy | 2020 |
| Kao Eiendom AS | Real estate | 2020 |
| Kao Eierselskap AS | | 2026 |
| Kao Holding AS | Financial services | 2005 |
| Kaoskos AS | Arts & recreation | 2026 |
| Kapitalinvest Holding AS | Real estate | 2002 |
| Kapittel 2 AS | Professional & scientific | 2025 |
| Kapso AS | Real estate | 2013 |
| Kaptein Sabeltann AS | Administrative & support | 2004 |
| Kaptein Sabeltann Event AS | Arts & recreation | 2023 |
| Kardangen Trafikkskole AS | Education | 2011 |
| Kardus Holding AS | Financial services | 2014 |
| Karem AS | Real estate | 2005 |
| Karisma Velvære AS | Other services | 2022 |
| Karlin Invest AS | Real estate | 2005 |
| Karlsen X Holding AS | | 2022 |
| Karmin Garn & Gaver AS | Wholesale & retail | 2004 |
| Karsten AS | Financial services | 2005 |
| Kartevoll AS | Construction | 1972 |
| Kartevoll Eiendom AS | Real estate | 2007 |
| Kartevoll Invest AS | Construction | 2006 |
| Kartheia 3 AS | Real estate | 2015 |
| Kartheia 5 SNR 4 AS | Real estate | 2026 |
| Kartheia Eiendom AS | Real estate | 2010 |
| Karto Borgen AS | | 2025 |
| Karto Eiendom AS | Construction | 2026 |
| Kasernen Parkering AS | Real estate | 2016 |