| Holmejordetveien 17 AS | Real estate | 2022 |
| Holmejordetveien 19 AS | Real estate | 2013 |
| Holmium Eiendom AS | Construction | 2013 |
| Holms Eiendom AS | Real estate | 2010 |
| Holms Forlag AS | Information & communication | 2004 |
| Holms Kongshaug Eiendom AS | Real estate | 2018 |
| Holms Vikingenes Verden AS | Hospitality | 2000 |
| Holtan Entreprenør AS | Construction | 2021 |
| Home Factory AS | Wholesale & retail | 2016 |
| Home Property AS | Real estate | 2022 |
| Hooli Holding AS | Financial services | 2018 |
| Horgenjonsson AS | Health & social care | 2012 |
| Horisont Nordinvest AS | Real estate | 2020 |
| Horisont Sport AS | Wholesale & retail | 2020 |
| Horse Tracker AS | Information & communication | 2023 |
| Hos Marit AS | Wholesale & retail | 2024 |
| Houlali Transport AS | Transport & logistics | 2025 |
| Hoved Eiendom AS | Real estate | 2025 |
| Hovenga Senter AS | Real estate | 1986 |
| Hovland Apotek AS | Wholesale & retail | 2024 |
| Hovland Service-Senter AS | Other services | 2023 |
| HSS Holding AS | | 2020 |
| Hudpleie Thanh AS | Other services | 2013 |
| Hummerbakkveien 360-362 AS | Real estate | 2021 |
| Hungry Heart AS | Real estate | 2020 |
| Hungry Heart Cafè AS | Hospitality | 2014 |
| Husteknikk AS | Construction | 2016 |
| HV Live AS | Arts & recreation | 2026 |
| Hvalen Holding AS | Financial services | 2005 |
| Hvalen Utvikling AS | Real estate | 1983 |
| Hybrid Minds AS | Wholesale & retail | 2015 |
| Hytteconsult AS | Real estate | 1999 |
| Helge Klyve AS | Construction | 1986 |
| Håkonsgate 42 AS | Real estate | 2017 |
| Håkonsgate Invest AS | Real estate | 2005 |
| Håndverk Og Eiendom AS | Construction | 2002 |
| Høeg Eiendom Holding AS | Real estate | 2008 |
| Høgsveen Maskin AS | Construction | 2010 |
| Hølen Matbar AS | Hospitality | 2022 |
| Hølen Restaurantdrift AS | Hospitality | 2025 |
| Høste Transport AS | Transport & logistics | 2012 |
| Ian Holding AS | Real estate | 2019 |
| Ian Karl Gustavsen AS | Real estate | 1992 |
| Ida Fuhre Holding AS | | 2023 |
| Identigo AS | Information & communication | 2024 |
| Ifokus AS | Health & social care | 2016 |
| Ifokus Holding AS | Education | 2017 |
| Ifokus Kompetanse AS | Education | 2015 |
| Iførersete AS | Education | 2020 |
| Igc Invest AS | | 2023 |
| Igenius AS | Professional & scientific | 2001 |
| IH3 Eiendom AS | Real estate | 2019 |
| IHL1 Invest AS | | 2022 |
| Ikaria AS | Administrative & support | 2006 |
| Ikm Instrutek AS | Wholesale & retail | 2001 |
| Il Passatore Italiano Drift AS | Hospitality | 2012 |
| IL3-A Amundrød AS | Real estate | 2020 |
| IL3-B Amundrød 1 AS | Real estate | 2022 |
| IL3-B Amundrød 2 AS | Real estate | 2022 |
| IL3-C Amundrød AS | Real estate | 2020 |
| IL3-D Amundrød AS | Real estate | 2020 |
| IL3-E Amundrød AS | Real estate | 2020 |
| IL5 Amundrød AS | Real estate | 2019 |
| IL6-A Rødbøl AS | Real estate | 2021 |
| IL6-B Rødbøl AS | Real estate | 2021 |
| IL6-C Rødbøl AS | Real estate | 2021 |
| IL7-A Rødbøl AS | Real estate | 2021 |
| IL7-B Rødbøl AS | Real estate | 2021 |
| IL7-C Rødbøl AS | Real estate | 2021 |
| IL7-D Rødbøl AS | Real estate | 2021 |
| Ilag Holding AS | Financial services | 2005 |
| ILK1-A Rødbøl AS | Real estate | 2021 |
| ILK1-B Rødbøl AS | Real estate | 2021 |
| ILK1-C Rødbøl AS | Real estate | 2021 |
| Imagio AS | Professional & scientific | 2024 |
| Imajj Hodling AS | | 2025 |
| Indiehair AS | Other services | 2014 |
| Industri & Skogservice AS | Manufacturing | 2023 |
| Industri-Support AS | Manufacturing | 2006 |
| Industriveien 8 Verningen AS | Real estate | 2026 |
| Infinity Quality & Engineering AS | Professional & scientific | 2025 |
| Ingeniørfirma TPS AS | Manufacturing | 2012 |
| Ingivan Consulting AS | Professional & scientific | 2024 |
| Ingri Invest AS | Financial services | 2015 |
| Innovation 4 U AS | Information & communication | 2006 |
| INNOVATION4ALL AS | Professional & scientific | 2023 |
| Inproco Holding AS | Real estate | 2020 |
| Inqula AS | Information & communication | 2024 |
| Insilva AS | Manufacturing | 2018 |
| Insisy AS | | 2021 |
| Insite Media AS | Information & communication | 2015 |
| Inspira Holding AS | Administrative & support | 2025 |
| Inspira Ressurs AS | Administrative & support | 2025 |
| Insys AS | Information & communication | 2004 |
| Intentium AS | Professional & scientific | 2007 |
| Inter Eiendom AS | Real estate | 2019 |
| Inter Eiendom Finans AS | Real estate | 2018 |
| Inter Eiendom Prosjektpartner AS | Real estate | 2008 |
| Inter Eiendom Sandefjord AS | Real estate | 2011 |
| Inter Eiendom Vestfold AS | Real estate | 2024 |