| Hashtag AS | Wholesale & retail | 2026 |
| Hauerseter Tomt AS | Real estate | 2011 |
| Haugen Eiendom AS | Real estate | 1998 |
| Haukaa Holding AS | | 2020 |
| HB Group AS | Professional & scientific | 2023 |
| HB Group Entreprenør AS | Construction | 2022 |
| He Entreprenør AS | Real estate | 2022 |
| Hef Holding AS | | 2025 |
| Heim Jessheim AS | Hospitality | 2021 |
| Hejul AS | Real estate | 2019 |
| Helen AS | Real estate | 2010 |
| Helene Og Dag Kjelland AS | Health & social care | 2022 |
| Hellvik Hus Follo Eiendomsutvikling AS | Construction | 2000 |
| Hellvik Hus Region Øst AS | Professional & scientific | 2017 |
| Hellvik Hus Øst AS | Construction | 2003 |
| Hellvik Hus Øst Eiendomsutvikling AS | Real estate | 2005 |
| Helse I Senter AS | Health & social care | 2018 |
| Helsen Min AS | Health & social care | 2023 |
| Hendrix Hair Jessheim AS | Other services | 2026 |
| Hero Bygg Og Eiendom AS | Professional & scientific | 2013 |
| Herredshuset Drift AS | Real estate | 2003 |
| Herseth Property AS | Real estate | 1993 |
| Herseth Spieler AS | | 2020 |
| Herstua Grus AS | Mining & quarrying | 1989 |
| Herstua Miljø AS | Water & waste | 2012 |
| Hertzenberg Utvikling AS | | 2023 |
| Hifihub AS | Wholesale & retail | 2023 |
| High Kites Regnskap Gardermoen AS | Professional & scientific | 2018 |
| Himmelgrønt AS | Agriculture & fishing | 2023 |
| Hit Cons AS | | 2023 |
| HJR Holding AS | Real estate | 2012 |
| HJR Utland 3 AS | Real estate | 2014 |
| HJR Utland 4 AS | Education | 2019 |
| HJR Utland 6 AS | Education | 2019 |
| HJR Utland AS | Real estate | 2014 |
| HLC AS | Professional & scientific | 2011 |
| HMF Norge Nuf | Wholesale & retail | 2013 |
| Hobrå Eiendom AS | Real estate | 2015 |
| Holter Eiendom AS | Real estate | 2001 |
| Home Furnishing Norway AS | Wholesale & retail | 2020 |
| Homesync AS | Wholesale & retail | 2022 |
| Hoolsy AS | Information & communication | 2021 |
| Hoppensprett Akademiet AS | Education | 2011 |
| Hoppensprett Akademiet VGS Jessheim AS | Education | 2014 |
| Hoppensprett Barneskole Jessheim AS | Education | 2015 |
| Hoppensprett Drift AS | Education | 2023 |
| Hoppensprett Gystad AS | Education | 2023 |
| Hoppensprett Hurdal AS | Real estate | 2022 |
| Hoppensprett Nes AS | Education | 2010 |
| Hoppensprett Nordkisa AS | Education | 2003 |
| Hoppensprett Skogmo AS | Education | 2023 |
| Hoppensprett Solbakken AS | Education | 2022 |
| Hoppenspretthallen AS | Real estate | 2022 |
| Hoppenspretthallen Barnehage AS | Education | 2007 |
| Hoppeslottkongen AS | Administrative & support | 2011 |
| Hosting & It-Service AS | Information & communication | 2012 |
| Hot Pizza AS | Hospitality | 2018 |
| Hotellspesialisten AS | Administrative & support | 2017 |
| Hotspur Invest AS | | 2016 |
| Hov Invest AS | Financial services | 2005 |
| Hovin Meieri AS | Real estate | 2012 |
| Hovin Trevare & Jessheim Glasservice AS | Manufacturing | 1998 |
| HPT Holding AS | Transport & logistics | 2005 |
| HT Utvikling AS | Real estate | 2017 |
| Hub Marked AS | Wholesale & retail | 2021 |
| Hub Marked Manglerud AS | Wholesale & retail | 2022 |
| Hugo Beck Installasjon AS | Construction | 1988 |
| Hunger Invest AS | | 2024 |
| Hus Og Anlegg Da | Professional & scientific | 2000 |
| Huso Holding AS | Financial services | 2015 |
| Håndverkerhjerte AS | Construction | 2025 |
| Hølti AS | Real estate | 2007 |
| Høydeassistanse AS | Construction | 1985 |
| I-Bolig AS | Construction | 1996 |
| I-Bolig Eiendom AS | Real estate | 2020 |
| Ibsensykehusene AS | Health & social care | 1998 |
| Id Mur Og Flis AS | Construction | 2021 |
| Idas Vei 41 AS | Real estate | 2017 |
| Ideas + Action Agency AS | Professional & scientific | 2022 |
| Idretten 6C AS | Real estate | 2024 |
| Ik Eiendom & Facility AS | Real estate | 2022 |
| Ilma Holding AS | | 2023 |
| Imperilal Holding Invest AS | Construction | 2023 |
| Inceptor AS | Information & communication | 2008 |
| Industriporter AS | Wholesale & retail | 1992 |
| Industrivegen 10 Jessheim AS | Real estate | 2020 |
| Industrivegen 22 AS | Real estate | 2016 |
| Industrivegen 28 AS | Real estate | 2025 |
| Infoteknik.No AS | Administrative & support | 2015 |
| Infralink AS | Wholesale & retail | 2020 |
| Ingeborg Beslag & Låssystemer AS | Wholesale & retail | 2001 |
| Ingebrigtsen Regnskap AS | Professional & scientific | 2008 |
| Inger Marie Røn AS | Health & social care | 2025 |
| Innodu Labs AS | Professional & scientific | 2023 |
| INNOV8 AS | Real estate | 2015 |
| INNOV9 AS | Real estate | 2024 |
| Insaine Gardens Trondheim AS | Administrative & support | 2022 |
| Inspiratene Nuf | Arts & recreation | 2009 |
| Inspiri AS | Wholesale & retail | 2025 |
| Instatech AS | Construction | 2021 |