| Hafo AS | Professional & scientific | 2005 |
| Hafra AS | | 2020 |
| Hafrsfjord Tre AS | Manufacturing | 1977 |
| Haga & Grov AS Sivilarkitekter Mnal | Professional & scientific | 1992 |
| Haga AS | Construction | 2016 |
| Haga Bolig AS | Real estate | 2016 |
| Haga Property AS | Real estate | 2005 |
| Hagakure AS | | 2022 |
| Hagcon AS | Financial services | 2008 |
| Hagen Invest AS | Real estate | 2001 |
| Hagen Investering AS | Financial services | 2005 |
| Hageroboten Jeeves AS | Professional & scientific | 2021 |
| Hageservice & Anlegg AS | Administrative & support | 2024 |
| Hagltårnet Næring AS | Real estate | 2011 |
| Hair & There Frisør AS | Other services | 1995 |
| Hair & There Storhaug AS | Other services | 2015 |
| Haiway Holdings AS | Information & communication | 2017 |
| Hajm Holding AS | Administrative & support | 2021 |
| Hakarl AS | Professional & scientific | 2016 |
| Hakkebakkeskogen Private Barnehage AS | Education | 2006 |
| Hakkebakkeskogen Private Barnehage Tjensvoll AS | Education | 2023 |
| Hako Ventures AS | | 2024 |
| Haldin AS | | 2025 |
| Halgunset Holding AS | | 2026 |
| Halli Hallo AS | | 2026 |
| Halliburton BV | Professional & scientific | 1998 |
| Halliburton Energy Services Inc | Professional & scientific | 2010 |
| Halliburton Group Canada Inc | Professional & scientific | 2010 |
| Halliburton Manufacturing and Services Ltd | Professional & scientific | 1995 |
| Hallingstien Invest AS | | 2023 |
| Halsnøy Holding AS | | 2020 |
| Halu AS | Real estate | 2013 |
| Halvi Eiendom AS | Real estate | 2014 |
| Halvorsen Property AS | Real estate | 2024 |
| Hameco Engineering AS | Wholesale & retail | 2021 |
| Hamex AS | Information & communication | 2005 |
| Hamex Invest AS | Real estate | 2006 |
| Hami AS | Hospitality | 2021 |
| Hamimo AS | Professional & scientific | 2011 |
| Hammer & Eliassen Holding AS | | 2025 |
| Hammer & Eliassen VVS AS | Construction | 2007 |
| Hammer Eiendommer AS | | 2025 |
| Hammer Investering AS | | 2019 |
| Hammerit AS | Information & communication | 2017 |
| Hamre Service AS | Manufacturing | 2017 |
| Hamrelarsen Invest AS | Real estate | 2002 |
| Hamster Und Robbe AS | Professional & scientific | 2023 |
| Han Investerer AS | Real estate | 2022 |
| Hana Hjem AS | Real estate | 2024 |
| Hana Investering AS | Financial services | 2005 |
| Handelshuset Stenseth AS | Wholesale & retail | 2003 |
| Hanekam AS | Hospitality | 2014 |
| Hanekam Holding AS | Hospitality | 2017 |
| Haneseth VVS Stavanger AS | Construction | 2025 |
| Hanne Invest AS | Financial services | 2015 |
| Hanotelli AS | | 2025 |
| Hansen På Skagen Eiendom AS | Real estate | 1985 |
| Hansson Engineering AS | Professional & scientific | 2010 |
| Hapeto Invest Nuf | Administrative & support | 2007 |
| Happy 50 AS | | 2024 |
| Happy Assets AS | | 2025 |
| Happy Bike AS | Other services | 2024 |
| Happy Corner AS | Hospitality | 2021 |
| Happy Fish AS | Agriculture & fishing | 2008 |
| Happy Hands & Feet AS | Other services | 2025 |
| Happydogs Holding AS | | 2023 |
| Happyhoof.No AS | Wholesale & retail | 2017 |
| Harboe Medical AS | Health & social care | 2007 |
| Harbour Energy Norge AS | Mining & quarrying | 2002 |
| Hard Holding AS | | 2015 |
| Hardangerveien Eiendom AS | Real estate | 2015 |
| Hardetklart AS | Professional & scientific | 2022 |
| Hardføre AS | Information & communication | 2023 |
| Hardråde Investering AS | Real estate | 2006 |
| Harmoni Holding AS | | 2026 |
| Harneshaug Invest AS | | 2014 |
| Harold Investment AS | Professional & scientific | 2016 |
| Harris Medical AS | Health & social care | 2025 |
| Hartstone AS | Information & communication | 2021 |
| Hase Holding AS | Professional & scientific | 2020 |
| Hass AS | Financial services | 2016 |
| Hassle Holding AS | | 2025 |
| Hatex AS | Wholesale & retail | 1987 |
| Hato Consulting AS | Professional & scientific | 2019 |
| Hatteland Holding AS | Real estate | 2005 |
| Haugane Hytter AS | Real estate | 2004 |
| Hauge & Bryplass Entreprenør AS | Construction | 2025 |
| Hauge & Sandsmark Eiendom Ans | Real estate | 1995 |
| Hauge Engineering AS | Professional & scientific | 2021 |
| Haugen Bygg & Service AS | Construction | 2013 |
| Haugesund Auto AS | Real estate | 2007 |
| Haugesundsgata 15 AS | Real estate | 2023 |
| Haugland Holding AS | Financial services | 2005 |
| Haugland Trading AS | Financial services | 2005 |
| Haugliveien Holding AS | | 2025 |
| Haugsgjerd Investering AS | Real estate | 2012 |
| Haugtussa Eiendom AS | Real estate | 2004 |
| Haugvaldstad AS | Real estate | 2005 |
| Haugvaldstad Eiendom Ans | Wholesale & retail | 2004 |
| Haugåsstubben 10 AS | Real estate | 1968 |