| Ihe 666 Holding AS | | 2023 |
| Ihu Holding AS | | 2025 |
| Ihu Management AS | Professional & scientific | 2023 |
| Iih Holding AS | Professional & scientific | 2005 |
| Imatong AS | Transport & logistics | 2016 |
| Industri Verktøy AS | Wholesale & retail | 2015 |
| Infinity Horizon Partners AS | Professional & scientific | 2024 |
| Infinity Norge AS | Wholesale & retail | 2005 |
| Inflyt Media AS | Professional & scientific | 2021 |
| Inform Invest AS | Wholesale & retail | 2007 |
| Ing Dahm & Bagle AS | Wholesale & retail | 1973 |
| Ing. Eirik Milde AS | Professional & scientific | 2003 |
| Inge S Transport AS | Transport & logistics | 2024 |
| Inger S Holding AS | | 2020 |
| Inneklima-Norge AS | Wholesale & retail | 2019 |
| Innoma AS | | 2022 |
| Innomhus AS | Construction | 2003 |
| Inpercepta AS | Information & communication | 2014 |
| Installatørservice AS | Construction | 1987 |
| Instanes AS Rådgivende Ingeniører | Professional & scientific | 1983 |
| Insurance Process Management AS | Information & communication | 2004 |
| Integritas AS | | 2019 |
| Intercultural Settlement and Communication Da | Professional & scientific | 2012 |
| Intersign Norge AS | Manufacturing | 1989 |
| Isbesa Holding & Invest AS | Real estate | 2019 |
| Isoenergi Vestland AS | Construction | 2020 |
| Isv Finans AS | Financial services | 2005 |
| IT Automation AS | Information & communication | 2019 |
| Itako AS | Financial services | 2015 |
| Itv Kapital AS | | 2004 |
| J&H Capital AS | | 2021 |
| J&M Invest AS | | 2026 |
| J.H. Riisøen AS | Real estate | 2025 |
| Ja Jacobsen Holding AS | | 2019 |
| Jacobs Douwe Egberts Norge AS | Manufacturing | 1989 |
| Jali Invest AS | | 2022 |
| Janas Vegas AS | Professional & scientific | 2019 |
| Jand Invest AS | | 2026 |
| Jania AS | Professional & scientific | 2015 |
| Jarax Invest AS | Financial services | 2015 |
| Jarle Lilletvedt AS | Wholesale & retail | 2015 |
| Jato Invest AS | | 2017 |
| Jave Invest AS | Wholesale & retail | 2001 |
| JB Investments AS | Financial services | 2017 |
| JBG Trening AS | Arts & recreation | 2024 |
| Je Utleie AS | Real estate | 2020 |
| Jea Pro Da | Arts & recreation | 2015 |
| Jean AS | Information & communication | 2016 |
| Jens Multiservice AS | Administrative & support | 2025 |
| Jensik AS | Financial services | 2010 |
| Jernvaren Laksevåg Senter AS | Wholesale & retail | 2001 |
| Jewa Invest AS | | 2018 |
| JGS Invest AS | Real estate | 2005 |
| Jil AS | Financial services | 2005 |
| Jimflyfly AS | Transport & logistics | 2007 |
| JKK Holding AS | | 2025 |
| Jlbg Holding AS | | 2026 |
| Jo-Eiendom AS | Real estate | 2020 |
| Jo-Holding AS | Real estate | 2020 |
| John-Willy Foss AS | Wholesale & retail | 2004 |
| Johnny Traveller AS | Transport & logistics | 2018 |
| Join the Circus AS | Wholesale & retail | 2022 |
| Jonoli Invest AS | Professional & scientific | 2016 |
| Jordalsveien 16-18 AS | Real estate | 2021 |
| Jovia Digital AS | Information & communication | 2026 |
| JPF Holding AS | Financial services | 2005 |
| Jpo Holding AS | | 2026 |
| JS Consulting AS | Professional & scientific | 2021 |
| JSM Rørservice AS | Construction | 2001 |
| K Eversvik AS | Wholesale & retail | 1932 |
| K Kristensen Bygg AS | Construction | 2003 |
| K. Kristensen Holding AS | | 2025 |
| K2 Næring AS | Hospitality | 2023 |
| Ka Ching AS | Professional & scientific | 2021 |
| Ka Eiendom Bergen AS | | 2021 |
| Kakri Holding AS | Professional & scientific | 2024 |
| Kalto Holding AS | Financial services | 2005 |
| Karbonade AS | Information & communication | 2017 |
| Karbonrens Vestlandet Nuf | Manufacturing | 2021 |
| Kari Tønjum AS | Real estate | 2015 |
| Kasi Holding AS | Real estate | 2005 |
| Kavli Holding AS | Manufacturing | 1924 |
| Kavli Norge AS | Manufacturing | 2003 |
| KBC Invest AS | Financial services | 2005 |
| Kebomed AS | Wholesale & retail | 1986 |
| Kenko AS | Wholesale & retail | 2005 |
| Kep Management AS | | 2021 |
| Kepla AS | Professional & scientific | 2001 |
| Kesi Eiendom AS | Real estate | 2007 |
| Kesj AS | | 2019 |
| Kevi AS | Real estate | 2005 |
| Kim Bergersen Holding AS | | 2023 |
| Kingbil AS | | 2018 |
| Kingdom Business AS | Real estate | 2025 |
| Kinsarvik Fruktutsalg AS | Wholesale & retail | 1981 |
| Kinsarvik Naturkost Sartor AS | Wholesale & retail | 2024 |
| Kinsarvik Retail AS | Wholesale & retail | 2008 |
| Kiosses Consult AS | Professional & scientific | 2022 |
| Kirostein AS | Health & social care | 2025 |
| Kismulvegen 187 AS | Real estate | 1999 |