| Groundbreaker AS | Manufacturing | 2019 |
| GS Energy Solutions AS | Professional & scientific | 2016 |
| GS Oiltools AS | Administrative & support | 2011 |
| Gühring Norway AS | Wholesale & retail | 2015 |
| H & a International AS | Professional & scientific | 2025 |
| H.M.Research Norway AS | Professional & scientific | 2018 |
| Habn Invest AS | Real estate | 2008 |
| Habu Holding AS | Professional & scientific | 2017 |
| Habu Sampling AS | Manufacturing | 2011 |
| Habu Solutions AS | Wholesale & retail | 2010 |
| Habu Subsea AS | Professional & scientific | 2011 |
| Hacpi Transport AS | Transport & logistics | 2025 |
| Hagaen AS | Construction | 2022 |
| Hagakrossen Eiendom AS | Real estate | 2002 |
| Hagegartner Håland AS | Administrative & support | 2013 |
| Halas Invest AS | Wholesale & retail | 2022 |
| Halliburton AS | Mining & quarrying | 1994 |
| Halliburton Eiendom 1 AS | Real estate | 2004 |
| Hammer Building & Trading AS | Construction | 2018 |
| Handeland Og Kaarvaag Utleie AS | Real estate | 2001 |
| Hanstvedt Invest AS | | 2025 |
| Hatloysen & Barenberg Holding AS | | 2025 |
| Havgløtt Invest AS | | 2020 |
| Havito AS | | 2023 |
| Havneringen Eiendom AS | Real estate | 1988 |
| Havstrøm Invest AS | | 2019 |
| He-Ro Holding AS | Agriculture & fishing | 2015 |
| Hecema Holding AS | Real estate | 2019 |
| Hellestø AS | Wholesale & retail | 1987 |
| Helsehuset Tananger AS | Health & social care | 2021 |
| Hereditas Holding AS | | 2025 |
| Herenya Holding AS | Financial services | 2017 |
| Hestholmen AS | Real estate | 2005 |
| Hihab AS | | 2021 |
| HLB Holding AS | Hospitality | 2022 |
| HLB Prosjekt AS | Construction | 2022 |
| Hogen Systems AS | Wholesale & retail | 2018 |
| Hos Grekerne AS | Hospitality | 2026 |
| House of Mork AS | | 2022 |
| Hummeren Eiendom Tananger AS | Real estate | 2006 |
| Hummeren Holding AS | Hospitality | 2006 |
| Hummeren Hotell AS | Hospitality | 1986 |
| Hundvåg Slipp & Mekaniske AS | Real estate | 1994 |
| Hurtitaxi AS | Transport & logistics | 2024 |
| Husdal Invest AS | | 2022 |
| Hydra Systems AS | Professional & scientific | 2011 |
| Hydra Well Intervention AS | Professional & scientific | 2016 |
| Hydrophilic AS | Professional & scientific | 2016 |
| Hydrotell AS | Professional & scientific | 2020 |
| Hytland Holding AS | Wholesale & retail | 2014 |
| I O S Tubular Management AS | Manufacturing | 1994 |
| I-E Tranvåg AS | Real estate | 1996 |
| Iapetus Invest AS | | 2025 |
| Ibis Investering AS | Real estate | 2009 |
| Iceofvikings AS | Energy | 2022 |
| Ikm Løfteteknikk AS | Professional & scientific | 2001 |
| Ikona AS | Wholesale & retail | 2025 |
| Ikt Forlaget AS | Information & communication | 2010 |
| Impulz Personlig Trening AS | Education | 2013 |
| Inc AS | Wholesale & retail | 2009 |
| Incon AS | Professional & scientific | 2023 |
| Industriakademiet AS | Education | 2014 |
| Industrial Water Solutions AS | Water & waste | 1999 |
| Ingeniørhjelpen AS | Professional & scientific | 2020 |
| Innkjøpskompetanse AS | Professional & scientific | 2019 |
| Innovasjonsklubben AS | | 2020 |
| Inorway AS | Wholesale & retail | 2015 |
| Intelliserv Norway AS | Mining & quarrying | 2006 |
| Interhoof AS | Agriculture & fishing | 2021 |
| Intertek Holdings Norge AS | Professional & scientific | 2012 |
| Intertek West Lab AS | Professional & scientific | 1998 |
| Invesco AS | Wholesale & retail | 2004 |
| Iron Mountain Norge AS | Information & communication | 1985 |
| IT Support AS | Information & communication | 1997 |
| Its Paula AS | Other services | 2026 |
| Jala Holding AS | Hospitality | 2023 |
| Jarl Trading & Invest AS | Real estate | 1998 |
| Jason Wadsworth Ltd | Professional & scientific | 2020 |
| Jer Norway AS | Professional & scientific | 2018 |
| Jh-Consulting AS | Professional & scientific | 2007 |
| Jika Invest AS | Real estate | 2008 |
| JKB Solutions Da | Administrative & support | 2010 |
| JM Well Services AS | Professional & scientific | 2026 |
| JMV AS | | 2005 |
| John Dahle AS | Real estate | 1976 |
| John Dahle Skipshandel AS | Wholesale & retail | 1996 |
| Joka Invest AS | Wholesale & retail | 2005 |
| Joker Pizza AS | Hospitality | 2025 |
| Jons Minde AS | Real estate | 1995 |
| Jordsmonnet AS | Wholesale & retail | 2017 |
| Jostein Lundal Rederi AS | Administrative & support | 2008 |
| Joys Investeringer AS | | 2021 |
| JP Høines Holding AS | | 2023 |
| Jusoje Invest AS | Real estate | 2013 |
| Jåsund Bygg AS | Construction | 2026 |
| Jæren Isolering AS | Construction | 2023 |
| Jøvoll Kystfiske AS | Agriculture & fishing | 2023 |
| K L Jensen AS | Wholesale & retail | 1983 |
| Kallesten Eiendom AS | Real estate | 1987 |
| Kallesten Revisjon Og Regnskap AS | Professional & scientific | 1989 |