| Haralds Trafikkskole Anders Ullaug AS | Education | 2013 |
| Haralds Trafikkskole Ski AS | Education | 2021 |
| Harvey Rose Holding AS | | 2025 |
| Hauknes AS | Construction | 2022 |
| Havn Bolig AS | Real estate | 2025 |
| Havn Håndverk AS | Construction | 2026 |
| Havn Næringseiendom AS | Real estate | 2026 |
| Havrevold Consulting AS | Information & communication | 2019 |
| Haw AS | Administrative & support | 2024 |
| HB Holding AS | | 2020 |
| HD Utvikling AS | Real estate | 2023 |
| HDW Holding AS | | 2022 |
| Heatcoze AS | Wholesale & retail | 2023 |
| Hebekk Bygg AS | Construction | 2017 |
| Hebekk Transport AS | Transport & logistics | 2024 |
| Hebekkskogen SA | Education | 1998 |
| Hedelix AS | Professional & scientific | 2023 |
| Hee Invest AS | Financial services | 2017 |
| Heiamini AS | Wholesale & retail | 2023 |
| Heinaskogen AS | | 2022 |
| Helgesen Bygg AS | Construction | 2020 |
| Heliticket AS | Transport & logistics | 2016 |
| Hellerud Og Carlsen Agentur Ans | Wholesale & retail | 2001 |
| Helse for Alle AS | Health & social care | 2013 |
| Helse-Invest AS | Other services | 2012 |
| Helsem Invest AS | | 2025 |
| Helsetjenester AS | Health & social care | 2021 |
| Hennyng Og Langseter Ans | Real estate | 1999 |
| Henwill AS | Construction | 2019 |
| Hgmg Holding AS | | 2020 |
| Hifi & Vinyl AS | Wholesale & retail | 2023 |
| High Kites Holding AS | Professional & scientific | 2023 |
| Hilmar Hammerhei AS | Wholesale & retail | 1989 |
| Hio Holding AS | | 2025 |
| Hippo Finance AS | | 2024 |
| Hisham Sadek Invest AS | | 2021 |
| Historiske Bygg AS | Real estate | 2013 |
| Hit the Post AS | Real estate | 2012 |
| HJD Invest AS | Real estate | 2026 |
| HKM - Holding AS | | 2021 |
| Hmbrg Holding AS | | 2026 |
| HMR Holding AS | | 2025 |
| Hnsn Holding AS | | 2025 |
| Hoen AS | Real estate | 2023 |
| Hoerbiger Service Nordic AS | Manufacturing | 1957 |
| Hoffco Eiendom AS | Real estate | 2017 |
| Hofgaard AS | | 2021 |
| Hokulani AS | Real estate | 2007 |
| Holding Abo AS | | 2026 |
| Holm Future Invest AS | | 2020 |
| Holmentoppen AS | Professional & scientific | 2021 |
| Holstad Stasjon AS | Real estate | 2021 |
| Holte Fikser AS | Administrative & support | 2025 |
| Holtekvartalet AS | Real estate | 2011 |
| Homegym AS | Arts & recreation | 2024 |
| Horisonten AS | Real estate | 2019 |
| Hotnor AS | | 2018 |
| Hox Kapital AS | | 2026 |
| Hox Skog&Eiendomsutvikling AS | Real estate | 2026 |
| Hrim AS | Wholesale & retail | 2026 |
| HRS Elektro Follo AS | Construction | 2023 |
| Ht-Holding AS | | 2024 |
| HTP Casa AS | Real estate | 2024 |
| Hubro Rådgivning Ans | Professional & scientific | 2001 |
| Hulk Holding AS | | 2025 |
| Hundestasjon AS | Agriculture & fishing | 2022 |
| Husby Engineering AS | Professional & scientific | 2020 |
| Husevik Vakt Og El-Sikkerhet AS | Administrative & support | 2016 |
| Hydramek AS | Wholesale & retail | 2010 |
| Hydramek Management AS | Professional & scientific | 2015 |
| Hågensen Holding AS | | 2026 |
| Håkon Kjeldsen Holding AS | | 2023 |
| Høglo Trafikkskole AS | Education | 2026 |
| I H Eiendom AS | Wholesale & retail | 1989 |
| I M Ruud Regnskap AS | Professional & scientific | 2021 |
| Ibim AS | Professional & scientific | 2012 |
| Icspartner Holding AS | Information & communication | 2012 |
| Idrettsveien 14-18 AS | Real estate | 1985 |
| Idrettsveien 20 AS | Real estate | 1976 |
| Ihm Invest AS | | 2021 |
| Ile Studio AS | Professional & scientific | 2023 |
| Imem Lifts Norway AS | Construction | 2025 |
| Imi Hydronic Engineering AS | Wholesale & retail | 1997 |
| Implea Analytics AS | Information & communication | 2026 |
| Implea Consulting AS | Professional & scientific | 2020 |
| Improvators AS | Professional & scientific | 2023 |
| Impuls Helse Ski AS | Health & social care | 2024 |
| Impulse Power AS | Wholesale & retail | 2017 |
| In House Holding AS | | 2022 |
| Incrementum Holding AS | | 2025 |
| India Curry Ans | Hospitality | 1999 |
| Indseth Eiendom AS | Real estate | 1996 |
| Indseth Holding AS | Real estate | 2014 |
| Indseth Transport AS | Transport & logistics | 1981 |
| Industri Consulting AS | Professional & scientific | 2019 |
| Industritrykk Sjølie Og Cook Ans | Manufacturing | 1988 |
| Industriveien 7-11 AS | Real estate | 1986 |
| Industriveien Eiendom AS | Real estate | 2003 |
| Ine Lofthus Arnesen Holding AS | | 2024 |
| Inevitable Growth AS | Professional & scientific | 2026 |