| Has Architects AS | Professional & scientific | 2022 |
| Has Gruppen AS | Professional & scientific | 2023 |
| Has Investment AS | Real estate | 1965 |
| HAS5 Holding AS | | 2024 |
| Hasane Holding AS | | 2023 |
| Hascend AS | Professional & scientific | 2020 |
| Hasg Invest AS | | 2023 |
| Hashi Sports AS | Professional & scientific | 2025 |
| Hashi Tolketjenester AS | Professional & scientific | 2012 |
| Hashtag Media AS | Professional & scientific | 2020 |
| Hashthetics AS | Information & communication | 2023 |
| Hasil AS | | 2021 |
| Hasin AS | | 2021 |
| Hasjø Holding AS | Financial services | 2005 |
| Haska Import Ans | | 1989 |
| Hasle Consult AS | Professional & scientific | 1998 |
| Hasle Eiendomsdrift AS | Real estate | 1999 |
| Hasle Holding AS | Arts & recreation | 2025 |
| Hasle Linie Gastropub AS | Hospitality | 2013 |
| Hasle Linje 13 AS | Real estate | 2014 |
| Hasle Linje 9 AS | Real estate | 2012 |
| Hasle Linje Bygg 01 AS | Real estate | 2014 |
| Hasle Linje Bygg 01 Exit AS | Real estate | 2018 |
| Hasle Linje Infrastruktur AS | Professional & scientific | 2002 |
| Hasle Linje Næring Da | Real estate | 2014 |
| Hasle Linje Parkering AS | Real estate | 2011 |
| Hasle Stasjon Næring AS | Real estate | 2026 |
| Hasle Tomteselskap AS | | 2025 |
| Hasle Torg Nærsenter AS | Real estate | 2007 |
| Hasle Utvikling AS | Real estate | 2007 |
| Haslekollen AS | Real estate | 1996 |
| Haslelund Bygg AS | Real estate | 1963 |
| Haslemann AS | Real estate | 2012 |
| Haslestad Regnskap AS | Professional & scientific | 1980 |
| Haslevangen 13 AS | Real estate | 2012 |
| Haslevangen 14 F-G AS | Real estate | 2025 |
| Haslevangen 15 AS | Real estate | 2007 |
| Haslevangen 16 AS | Real estate | 2012 |
| Haslevangen AS | Real estate | 1997 |
| Haslevangen Bolig AS | | 2024 |
| Haslevangen Utvikling AS | Real estate | 2024 |
| Hasleveien 15 AS | Real estate | 2017 |
| Hasleveien 28 AS | Real estate | 2018 |
| Hasleveien 31 AS | Real estate | 2005 |
| Hasleveien 38 Ans | Real estate | 2001 |
| Haslevollen Eiendom AS | Real estate | 1946 |
| Haslevollen Utvikling AS | Real estate | 2012 |
| Hasli Investments AS | | 2022 |
| Haslie Takst AS | Real estate | 2025 |
| Haslum Bolig AS | Real estate | 2016 |
| Haslumhuset Holding AS | Real estate | 2019 |
| Haslund AS | Professional & scientific | 2012 |
| Hasmac AS | Information & communication | 2019 |
| Hasnaoui AS | Transport & logistics | 2026 |
| Hassan Ahmed Transport AS | Transport & logistics | 2024 |
| Hassan Jatt AS | Hospitality | 2023 |
| Hassan Triodelab Da | Information & communication | 2025 |
| Hassel AS | | 2023 |
| Hassel Holding AS | Real estate | 2017 |
| Hassel Invest AS | | 2012 |
| Hassel Shipping 4 AS | Transport & logistics | 2014 |
| Hassel Vaage AS | Financial services | 2018 |
| HASSEL2 AS | | 2018 |
| Hasselbakken AS | Administrative & support | 2018 |
| Hasselgården Da | Real estate | 1994 |
| Hasselnøtt AS | | 2026 |
| Hasselsnaff AS | | 2021 |
| Hasseløy Invest AS | | 2022 |
| Hast AS | Transport & logistics | 2012 |
| Hast Holding AS | Administrative & support | 2011 |
| Hast Invest AS | Financial services | 2005 |
| Haston AS | Professional & scientific | 1957 |
| Hasu Holding AS | | 2020 |
| Hasvold AS | Wholesale & retail | 1980 |
| Hatchling Holdings AS | | 2025 |
| Hathon Eiendom AS | Real estate | 2025 |
| Hathon Holding AS | Real estate | 2000 |
| Hathon Invest AS | Real estate | 2025 |
| Hatle AS | Financial services | 2012 |
| Hatlebakk Holdings AS | | 2020 |
| Hatlelid Invest AS | | 2020 |
| Hatlem AS | | 2016 |
| Hato Invest AS | Financial services | 2003 |
| Hatra Eiendom AS | Real estate | 2010 |
| Hatra Holding AS | Transport & logistics | 1980 |
| Hatros I AS | Real estate | 2006 |
| Hatros II AS | Real estate | 2007 |
| Hatshepsut AS | | 2024 |
| Hatteland AS | | 2021 |
| Hatteland II AS | | 2024 |
| Hatteras Holding AS | | 2026 |
| Hattifnatti AS | Professional & scientific | 2020 |
| Hattrem AS | Professional & scientific | 2010 |
| Hattrick Consulting AS | Professional & scientific | 2015 |
| Hatu Invest AS | Real estate | 2016 |
| Hauane Invest AS | Real estate | 2024 |
| Hauco AS | Real estate | 1977 |
| Hauco Invest AS | Real estate | 2008 |
| Haug + Maberg AS | Wholesale & retail | 2016 |
| Haug Advisory AS | Professional & scientific | 2018 |