| Hommelvik Stasjonsby AS | Real estate | 2019 |
| Hong Kong Palace AS | Hospitality | 2005 |
| Honning Gruppen AS | Arts & recreation | 2020 |
| Hontz Tech AS | Information & communication | 2022 |
| Hoopla AS | Information & communication | 2011 |
| Hope 4 Fashion Da | Other services | 2007 |
| Hoppidet AS | Real estate | 2020 |
| Horg Multiservice AS | Construction | 2021 |
| Horisont Invest AS | Construction | 2005 |
| Horizon Eiendom AS | Real estate | 2023 |
| Horizon Software AS | Information & communication | 1989 |
| Horn Bygg AS | Construction | 2023 |
| Horneberg Fus Barnehage AS | Education | 2018 |
| Horneberg Gård AS | Real estate | 2004 |
| Horneberg Holding AS | Real estate | 2006 |
| Horneberg Invest AS | Real estate | 2015 |
| Horneberg Utvikling AS | Real estate | 2025 |
| Hornebergveien 1 AS | Real estate | 2017 |
| Hornebergveien 11B AS | Real estate | 2023 |
| Hornebergveien 19 AS | Real estate | 2013 |
| Hornebergveien 3-5 AS | Real estate | 1976 |
| Hornebergveien 4 AS | Real estate | 2007 |
| Hornebergveien 4B AS | Real estate | 2014 |
| Hornebergveien 6 AS | Real estate | 2002 |
| Hornebergveien 7 Ans | Real estate | 1989 |
| Hornebergveien 7 AS | Real estate | 2002 |
| Hornet AS | Information & communication | 2025 |
| Hornum Holding AS | | 2022 |
| Hortman Holding AS | | 2022 |
| Hospitalløkka 39 AS | Real estate | 2021 |
| Hospitum AS | Real estate | 2013 |
| Hossa Holding AS | Professional & scientific | 2007 |
| Host Invest AS | | 2005 |
| Hoston AS | | 2026 |
| Hotel Brattøra AS | Hospitality | 2010 |
| Hotel Grand Olav AS | Hospitality | 1996 |
| Hotell Bakeriet AS | Hospitality | 2015 |
| House of Beauty AS | Information & communication | 1996 |
| Hov Frisør AS | Other services | 2025 |
| Hovd AS | Professional & scientific | 2021 |
| Hovdal Kapital AS | Real estate | 2014 |
| Hovedhuset AS | Wholesale & retail | 2011 |
| Hovedkvarteret AS | Real estate | 1994 |
| Hovland Eigendom Ans | Real estate | 1996 |
| HP Invictius AS | Real estate | 2018 |
| Hpo Invest AS | Real estate | 2017 |
| HPS Newco AS | Professional & scientific | 2025 |
| HR Vikar AS | Administrative & support | 2016 |
| Hravn AS | Information & communication | 2026 |
| Hre AS | Real estate | 2007 |
| HS Aktiv AS | | 2025 |
| Hspu AS | Arts & recreation | 2018 |
| HT Transport AS | Transport & logistics | 2011 |
| HTH Kjøkken Trondheim AS | Wholesale & retail | 1988 |
| Hti 2 AS | Real estate | 2020 |
| HTK Invest AS | Real estate | 2017 |
| HTS Næring AS | Real estate | 2021 |
| Huba AS | Professional & scientific | 2012 |
| Hubble Holding AS | | 2022 |
| Huckleberry Invest AS | | 2019 |
| Hud Og Spa Akademiet AS | Education | 2004 |
| Hudlege Karin Moser AS | Health & social care | 2015 |
| Hudspesialisten AS | Health & social care | 2008 |
| Hufs AS | Wholesale & retail | 2018 |
| Hugdal Invest AS | Real estate | 2017 |
| Hugin Medical AS | Information & communication | 2025 |
| Huiling Holding AS | | 2023 |
| Huitfeldtgården Da | Construction | 2009 |
| Huitfeldts Stuer AS | Hospitality | 2011 |
| Hula AS | Hospitality | 2021 |
| Huleboer Holding AS | | 2026 |
| Human Factory AS | Wholesale & retail | 2009 |
| Humanfactor AS | Professional & scientific | 2002 |
| Humlehaugen AS | Real estate | 2007 |
| Hummelfjell AS | Real estate | 2020 |
| Hummeltoften AS | | 2024 |
| Humulus AS | Real estate | 1979 |
| Hund I Balanse Med Ann-Kathrin AS | Other services | 2026 |
| Hundepatruljen AS | Other services | 2011 |
| Hundhammerfjellet AS | Energy | 2018 |
| Hundremeterskogen BHG SA | Education | 1992 |
| Hundvågtunet Eiendom AS | Real estate | 2010 |
| Hunt AS | Information & communication | 2019 |
| Hus Arkitekter AS | Professional & scientific | 1995 |
| Hus Polaire AS | Professional & scientific | 2016 |
| Husby Holding AS | Real estate | 2020 |
| Husby Malerservice AS | Construction | 2025 |
| Husebyaunet Eiendom AS | Real estate | 2014 |
| Huseiernes Advokatkontor AS | Professional & scientific | 2021 |
| Huseiernes Forvaltning AS | Real estate | 2021 |
| Huset Vårt AS | Wholesale & retail | 2003 |
| Husmorvikarsentret AS | Health & social care | 1995 |
| Husrom Eiendom AS | Real estate | 2021 |
| Husvær AS | Real estate | 2018 |
| Huygens AS | Professional & scientific | 2008 |
| Huyrebel AS | Information & communication | 2020 |
| Hvabehager AS | Arts & recreation | 2012 |
| Hvabehager!? Invest AS | Financial services | 2019 |
| Hvaler Holding AS | | 2019 |
| Hverdager AS | Arts & recreation | 2017 |