| Holdhusbygg AS | Construction | 2023 |
| Holding-Frøya-Mm AS | | 2025 |
| Holen 15 AS | Real estate | 2014 |
| Holmaas Invest AS | Construction | 2026 |
| Hope Handel AS | Wholesale & retail | 2008 |
| Hordaglass AS | Construction | 2024 |
| Hordaglass Holding AS | | 2024 |
| HXS Engineering AS | Professional & scientific | 2018 |
| Hylland Invest AS | Professional & scientific | 1998 |
| Hyr Bergen AS | Professional & scientific | 2024 |
| Hærø Invest AS | Construction | 2023 |
| Høyfoss Invest AS | | 2015 |
| I Bjørø Kobber & Blikk AS | Construction | 2018 |
| Ic-Bygg AS | Real estate | 1987 |
| Ima Kafè Drift AS | Hospitality | 2020 |
| Ima Kantinedrift AS | Hospitality | 2022 |
| Industribygget AS | Real estate | 1994 |
| Industrisenteret AS | Wholesale & retail | 2025 |
| Industrivegen 63 AS | Real estate | 2012 |
| Industrivegen AS | Real estate | 2015 |
| Inge Hjelle Holding AS | | 2021 |
| Ingvald Project Advisory AS | Professional & scientific | 2026 |
| Ingvaldstad Utvikling AS | Financial services | 2012 |
| Inovanza AS | | 2020 |
| Inprogress SS AS | | 2026 |
| Instinct Os AS | Wholesale & retail | 2013 |
| Institutt for Familie Og Relasjonsutvikling Da | Health & social care | 1987 |
| Irish Cat AS | Hospitality | 2010 |
| Irislegene AS | Health & social care | 2014 |
| Irispsykologene Da | Health & social care | 2024 |
| Iristannlegene Da | Health & social care | 2009 |
| Isolasjonsstein AS | Manufacturing | 2026 |
| Isoteks Miljø Vest AS | Construction | 2015 |
| Istid Holding AS | Real estate | 2016 |
| Iteno AS | Information & communication | 2018 |
| J-H Hetleflåt AS | Manufacturing | 2016 |
| Jacho Holding AS | | 2026 |
| Jafs Invest AS | Professional & scientific | 2005 |
| Jan Haukeland AS | Transport & logistics | 2012 |
| JAN2 AS | Arts & recreation | 2021 |
| Jarbeaux Media & Management AS | Information & communication | 2021 |
| Jari Holding AS | Financial services | 2005 |
| Javino Invest AS | Real estate | 2006 |
| Jeda Holding AS | Financial services | 2012 |
| Jevgenijs G AS | Construction | 2019 |
| Jho Eiendom AS | Real estate | 2019 |
| Jho Maskin Og Transport AS | Construction | 2018 |
| Jinert AS | Professional & scientific | 2023 |
| Jintec AS | Real estate | 2013 |
| Jitmo Holding AS | Health & social care | 2018 |
| JJ Murflis AS | Construction | 2013 |
| JKG 24 Holding AS | Administrative & support | 2023 |
| JKG Service AS | Administrative & support | 2023 |
| JKG Utleie AS | Administrative & support | 2023 |
| Joachim Gill AS | | 2023 |
| Joan Transport AS | Transport & logistics | 2009 |
| Johan D. Eide A/S | Wholesale & retail | 1988 |
| Johan Eide & Co AS | Wholesale & retail | 1990 |
| John Arve Halhjem AS | Construction | 2010 |
| John Børge Fenne Holding AS | | 2025 |
| Johs Holding AS | | 2026 |
| Johs Sælen & Sønn AS | Manufacturing | 1990 |
| Johs Sælen & Sønn Eiendomselskap AS | Manufacturing | 1990 |
| Jomo Fordyr AS | Agriculture & fishing | 2018 |
| Jordmorsvingen 4 AS | Real estate | 2007 |
| JSD Invest AS | | 2012 |
| Juridium AS | Professional & scientific | 2020 |
| K-Star Barber AS | Other services | 2020 |
| K. Gjerde Holding AS | Real estate | 2021 |
| K.M. Bygg AS | Construction | 2018 |
| Kaizen Consult AS | Professional & scientific | 2022 |
| Kali Hud- Og Helseterapi AS | Health & social care | 2009 |
| Kallestad Invest AS | Professional & scientific | 2022 |
| Kapitalutvikling AS | Manufacturing | 2009 |
| Kapittel 11 AS | Financial services | 2017 |
| Kapsel AS | Professional & scientific | 2005 |
| KB Capital AS | | 2026 |
| KB57 Prosjekt AS | Real estate | 2026 |
| KBC AS | Construction | 2026 |
| Kelis AS | | 2023 |
| Kenro AS | Financial services | 2016 |
| Key Servus AS | Wholesale & retail | 2022 |
| Kiamo AS | Professional & scientific | 2020 |
| Kifran AS | | 2020 |
| KIOSK1 AS | Wholesale & retail | 2016 |
| Kirkebukten AS | Real estate | 2012 |
| Kjell Aarvik Holding & Invest AS | | 2020 |
| Kjell Arne AS | Real estate | 2018 |
| Kjenmo Holding AS | | 2019 |
| Kjøkkendrift No 1 Os AS | Wholesale & retail | 2011 |
| Kksk Holding AS | Education | 2020 |
| Kleiven Kjøtt Og Delikatesse AS | Manufacturing | 1985 |
| KLS Invest AS | Financial services | 2017 |
| Knumos AS | Professional & scientific | 2016 |
| Kolskogheiane 3 AS | Real estate | 2022 |
| Kolskogheiane 6 AS | Real estate | 2012 |
| Kortly AS | Wholesale & retail | 2025 |
| Kraft Assets Holding AS | Professional & scientific | 2023 |
| Kristian Røttingen Holding AS | | 2022 |
| Kristine Sjaastad AS | | 2021 |