| Harmonien AS | Arts & recreation | 1918 |
| Harmony Bad AS | Construction | 2024 |
| Harpunveien 1 AS | Real estate | 1999 |
| Haru Eiendom AS | Real estate | 2003 |
| Has Invest AS | Real estate | 2012 |
| Hashi Invest AS | | 2021 |
| Hasig Eiendom AS | Real estate | 1990 |
| Hasleberg AS | Information & communication | 2006 |
| Hasleberg Holding AS | Information & communication | 2005 |
| Haslum Utvikling AS | Real estate | 2011 |
| Hasselhaug Eiendomsselskap AS | Real estate | 1999 |
| Hasseløy Holding AS | Wholesale & retail | 2022 |
| Hasseløy Kunst Og Kommunikasjon AS | Wholesale & retail | 2021 |
| Hattfjell Consulting AS | Other services | 2016 |
| Hauganveien 293 AS | | 2008 |
| Haugen Finans AS | Professional & scientific | 2005 |
| Hauger Bygg & Eiendom AS | Construction | 2012 |
| Hauges Gate 19-57 AS | Real estate | 2016 |
| Hauges Gate 19-58 AS | Real estate | 2016 |
| Haugesgate 84 AS | Households | 1947 |
| Haugesgt 1 AS | Real estate | 2016 |
| Haugesgt 88 AS | Households | 1947 |
| Haugsjø Invest AS | Financial services | 2005 |
| Haukjem Eiendom AS | Real estate | 2000 |
| Haukjem Holding AS | Manufacturing | 2005 |
| Haukjem Invest AS | | 2022 |
| Haust Holding AS | Wholesale & retail | 2015 |
| HAV59 AS | Arts & recreation | 2025 |
| Havn Bilpleie Og Bilvask AS | Other services | 2015 |
| Havnedrift AS | Administrative & support | 2024 |
| Havnegata Invest AS | | 2016 |
| Havnelageret Ltd Nuf | Real estate | 2008 |
| Havnskipp AS | Real estate | 2025 |
| Hawø Eiendom AS | Real estate | 1994 |
| HBC Holding AS | | 2021 |
| Hbe Holding AS | Financial services | 2005 |
| HBH Sales AS | Wholesale & retail | 2019 |
| HBN Holding AS | | 2022 |
| Hcmm AS | | 2023 |
| Headz AS | Other services | 2020 |
| Headz.Stine AS | Other services | 2024 |
| Healthinvest AS | Health & social care | 2012 |
| Healthpack AS | Manufacturing | 2017 |
| Heartbreaker Records SA | Information & communication | 2017 |
| Heatex Norway AS | Wholesale & retail | 2022 |
| Hebor AS | Financial services | 2017 |
| Hedalen Holding AS | | 2024 |
| Hedda Eiendom AS | Real estate | 2021 |
| Heddmar Holding AS | Real estate | 2008 |
| Hedengren Security AS | Wholesale & retail | 2012 |
| Hedensrud Barnehage SA | Education | 1989 |
| Hedenstadveien Eiendom AS | Real estate | 2024 |
| Heder Drift AS | Other services | 2019 |
| Hedman Fysio AS | Health & social care | 2021 |
| Hege Thorsrud Cafe AS | Wholesale & retail | 2006 |
| Heggalleen Eiendom AS | Real estate | 2015 |
| Heggeli AS | Real estate | 1982 |
| Heggeveien Invest AS | Real estate | 2008 |
| Hegloe AS | Professional & scientific | 2023 |
| Hegsbro Eiendom AS | Real estate | 2006 |
| Hegsbroveien 70-72 AS | Real estate | 2005 |
| Heiberg & Tveter AS | Professional & scientific | 2003 |
| Heimen Eiendom AS | Real estate | 1970 |
| Heinem AS | Real estate | 2006 |
| Heiniken Invest AS | Real estate | 2005 |
| Hejo Eiendom AS | Real estate | 2014 |
| Hekape Holding AS | Real estate | 1973 |
| Hekri Invest AS | | 2025 |
| Helex AS | | 2026 |
| Helgaker Keramikk AS | Arts & recreation | 2018 |
| Helge Frøiland AS | Construction | 1985 |
| Helgevold Montasje AS | Construction | 2019 |
| Helgro Teknikk AS | Other services | 2012 |
| Helima AS | Wholesale & retail | 2021 |
| Helix Drammen AS | Arts & recreation | 2022 |
| Hell No Invest AS | | 2021 |
| Hellefosstunet AS | Real estate | 2013 |
| Hellerudhaugen Eiendomsutvikling AS | Real estate | 2015 |
| Hellerudlia AS | Real estate | 2015 |
| Hellesund Invest AS | Financial services | 2017 |
| Helletrykk AS | Professional & scientific | 2026 |
| Helling Invest AS | Real estate | 2019 |
| Helmar Invest AS | | 2024 |
| Helping Hand Norway Estonia Ans | Health & social care | 1999 |
| Helse Og Omsorgstjenester AS | Health & social care | 2012 |
| Helse Og Skjønnhet AS | Health & social care | 2025 |
| Helselyst AS | Arts & recreation | 2025 |
| Helsesjekk AS | Health & social care | 2020 |
| Helsevekst Holding AS | Wholesale & retail | 2021 |
| Helsevekst Medikal AS | Wholesale & retail | 2021 |
| Helsevirke SA | Professional & scientific | 2013 |
| Helt Der Oppe AS | Information & communication | 2017 |
| Helt Komplett Bygg Og Anlegg AS | Real estate | 2015 |
| Helén Invest AS | Wholesale & retail | 2011 |
| Helén Nilsen & Co II AS | Real estate | 2011 |
| Hema One AS | Health & social care | 2014 |
| Hemina AS | Education | 2020 |
| Hemoni AS | | 2026 |
| Hemstad Invest AS | Information & communication | 2022 |
| Henden Mat AS | Wholesale & retail | 2022 |