| Gunnulfsen Holding AS | | 2024 |
| Guri Sandnes AS | Health & social care | 2005 |
| Gynekolog Kristin Klovning AS | Health & social care | 2021 |
| Gynekolog Trine Fredriksen AS | Health & social care | 2013 |
| Gyrocraft AS | Construction | 2014 |
| Gården På Prærien AS | Real estate | 2013 |
| H Lindhjem Holding AS | Real estate | 2015 |
| H-A-A-B AS | Real estate | 2010 |
| H12 Skien AS | Real estate | 2021 |
| Haap Invest AS | Construction | 2017 |
| Hafenbradl Ans | Manufacturing | 1990 |
| Hafenbradl AS | Administrative & support | 1998 |
| Hafsund Elektro AS | Construction | 2021 |
| Halvorsen Frakt & Flytting AS | Transport & logistics | 2012 |
| Halvorsen Smie Og Verksted AS | Manufacturing | 2004 |
| Halvorsli Eiendom AS | Real estate | 2018 |
| Halvorsli Fjell Og Grunn AS | Construction | 1983 |
| Hammond Blomster AS | Wholesale & retail | 2011 |
| Hammond Kvartalet Utvikling AS | Real estate | 2021 |
| Hammondgården Eiendom AS | Real estate | 2019 |
| Hamo Da | Administrative & support | 2000 |
| Hanne Borg AS | Wholesale & retail | 2026 |
| Hannemyr Nye Medier AS | Information & communication | 1996 |
| Hans Arve Holding AS | Financial services | 2005 |
| Hans Martin Eriksen Selskapsmusikk AS | Information & communication | 1990 |
| Hansen Begravelsesbyrå AS | Other services | 2000 |
| Hapet-Invest AS | | 2019 |
| Happy Yogi AS | Arts & recreation | 2019 |
| Harmoni Håndverksbakeri AS | Manufacturing | 2018 |
| Harvest Trading & Adventure AS | Wholesale & retail | 2020 |
| Haugen & Haugen AS | Professional & scientific | 2014 |
| Haugen Aksje AS | | 2021 |
| Haugen Group AS | Financial services | 2017 |
| Haugsjordet 5 AS | Real estate | 2017 |
| Haugtun Bolig AS | Real estate | 2023 |
| Havly Invest AS | Professional & scientific | 2005 |
| Havnegata 2 AS | Real estate | 2020 |
| HC Reimsgate AS | Real estate | 2012 |
| Hebobilturer AS | Professional & scientific | 2025 |
| Hedli Holding AS | | 2023 |
| Hegdalbakken 3A AS | Real estate | 2023 |
| Hegdalbakken 3B AS | Real estate | 2023 |
| Hegdalbakken 5A AS | Real estate | 1997 |
| Hegdalbakken 5B AS | Real estate | 2023 |
| Heggebakken Holding AS | | 2023 |
| Heie Eiendom AS | Real estate | 2022 |
| Heiland Site Engineering AS | Professional & scientific | 2026 |
| Heimgard AS | Real estate | 2019 |
| Heimgard Vågsbygd AS | Real estate | 2017 |
| Heistad Bil Caravan AS | Wholesale & retail | 2022 |
| Heistad Bolig AS | Real estate | 2018 |
| Heistad Bygg Og Eiendom AS | Real estate | 2018 |
| Heistad Fysioterapi & Trening AS | Health & social care | 2012 |
| Heistad Helsehus AS | Construction | 2019 |
| Heistad Legekontor AS | Health & social care | 1996 |
| Heistad Marked AS | Real estate | 2005 |
| Heistad Næringsselskap AS | Real estate | 2007 |
| Heistadpub'N AS | Hospitality | 2023 |
| Hekhen Invest AS | | 2025 |
| Hel-Se AS | Health & social care | 2013 |
| Heldal AS | | 2023 |
| Helene Celine Holding AS | Information & communication | 2022 |
| Helene Johnsen AS | Wholesale & retail | 2007 |
| Helgesen AS | Professional & scientific | 2001 |
| Helgesens Hjørne Ans | Real estate | 2002 |
| Helgåsen Konsulenter AS | Professional & scientific | 2021 |
| Helle Og Trond Clemmetsen AS | Transport & logistics | 2004 |
| Helse Eiendom Nord AS | Real estate | 2014 |
| Henab Sko AS | Wholesale & retail | 2004 |
| Hendrik Holding AS | | 2026 |
| Hendrix Hair Porsgrunn AS | Other services | 2014 |
| Henriette Invest AS | Real estate | 2005 |
| Herda AS | Real estate | 1991 |
| Herda Holding AS | Real estate | 2021 |
| Herman Taxi AS | Transport & logistics | 2025 |
| Heroli Holding AS | | 2023 |
| Herøya Elektro AS | Construction | 1990 |
| Herøya Industripark AS | Real estate | 2016 |
| Herøya Legesenter AS | Health & social care | 2018 |
| Herøya Nett AS | Energy | 2012 |
| Herøya-Grillen AS | Hospitality | 2013 |
| Herøyagrillen AS | Hospitality | 2026 |
| Hestehoven AS | Real estate | 2022 |
| Hestekrefter Energi AS | Energy | 2021 |
| Hestmo Holding AS | | 2019 |
| Hestås Holding AS | Real estate | 2019 |
| Hexagone AS | | 2025 |
| Heymama Group AS | Health & social care | 2025 |
| HFF Eiendom AS | Real estate | 2018 |
| Hgo Invest AS | Financial services | 2005 |
| High Fidelity Shop AS | Wholesale & retail | 2019 |
| High-Tech Recycling AS | Water & waste | 2017 |
| Hijole Invest AS | | 2024 |
| Hildes Salong AS | Other services | 2006 |
| Himalaya Holding AS | | 2019 |
| Hip Eiendom AS | Real estate | 2012 |
| His 4 AS | Real estate | 2015 |
| HJ Gruppen AS | Wholesale & retail | 2022 |
| Hjelpeselskapet Nord AS | Professional & scientific | 2026 |
| HK Future AS | Real estate | 2021 |