| Guts Holding AS | Manufacturing | 2005 |
| Guttas AS | Wholesale & retail | 2023 |
| Guttorms GT 5 AS | Households | 1979 |
| Gutwise AS | Health & social care | 2021 |
| GV13 Holding AS | Real estate | 2022 |
| GVK Invest AS | | 2026 |
| Gyldenløves Gate 11 AS | Real estate | 2021 |
| Gyldenløves Gate 15A AS | Real estate | 2020 |
| Gyldenløves Gate 15B AS | Real estate | 2017 |
| Gym 24 AS | | 2025 |
| Gym Nor AS | Wholesale & retail | 2025 |
| Gynekolog Kristin Offerdal AS | Health & social care | 2013 |
| Gynekolog Tvenning AS | Health & social care | 2024 |
| Gynekolog Tvenning Invest AS | Health & social care | 2024 |
| Gynnild Hartley AS | Professional & scientific | 2025 |
| Gätzschmann Holding AS | Real estate | 2012 |
| Gårdselskapet Trude Giæver AS | Real estate | 2011 |
| Gåseplogen AS | | 2023 |
| Gåte AS | Arts & recreation | 2017 |
| Gïjre Film AS | Information & communication | 2024 |
| Götenor AS | | 2024 |
| Gøtts Innovasjon Og Rådgivning AS | Professional & scientific | 2018 |
| H & F Bachke AS | Real estate | 1989 |
| H Amundsen Invest AS | | 2024 |
| H B P Holding AS | | 2026 |
| H Brekke AS | | 2021 |
| H Fledsberg AS | Professional & scientific | 2017 |
| H Oust AS | Professional & scientific | 2013 |
| H&H Utvikling | Professional & scientific | 2014 |
| H-Heim Holding AS | | 2022 |
| H-Holding AS | Professional & scientific | 2010 |
| H-Touch AS | Arts & recreation | 2007 |
| H. Berger H. AS | Real estate | 2024 |
| H. Brenden Holding AS | Professional & scientific | 2016 |
| H. Grøntvedt AS | Transport & logistics | 2020 |
| H. Reinertsen AS | | 2017 |
| H. Sæther Holding AS | Real estate | 2019 |
| H.Becker Holding AS | Construction | 2018 |
| H.K.S Invest AS | Real estate | 2017 |
| H.Skogøy Holding AS | | 2025 |
| H2 Frisør AS | Other services | 1999 |
| H2 Gruppen AS | Education | 1998 |
| Ha Kran & Transport AS | Transport & logistics | 2020 |
| Haagen Invest AS | | 2005 |
| Haakon Vii G 20 AS | Real estate | 1985 |
| Haakon Vii Gate 11 B AS | Real estate | 2005 |
| Haakon Vii S GT Holding AS | Real estate | 2014 |
| Haakon Vii's Gate 23 AS | Real estate | 2007 |
| Haakon Vii's GT 11 C AS | Real estate | 2012 |
| Haakon Vii's GT 13 C AS | Real estate | 1995 |
| Haakon Vii's GT 21 AS | Real estate | 2011 |
| Habari AS | Real estate | 1986 |
| Habea Holding AS | | 2019 |
| Habo Holding AS | Real estate | 2005 |
| Hackheim Industries AS | Administrative & support | 2015 |
| Haf Power Solutions AS | Manufacturing | 2019 |
| Haftor Holding AS | | 2021 |
| Hageanlegg AS | Administrative & support | 1991 |
| Hagebyen Private Barnehage SA | Education | 1993 |
| Hagemo Holding AS | Hospitality | 2021 |
| Hagen Distribusjon AS | Transport & logistics | 2025 |
| Hagen Thomas Angells Gate AS | Hospitality | 2020 |
| Hagerup Holding AS | | 2019 |
| Hagib AS | Real estate | 2017 |
| Hagspiel Invest AS | | 2024 |
| Hair by Kjerstin AS | Other services | 2022 |
| Hair by Lene AS | Other services | 2026 |
| Hair by Line AS | Other services | 2015 |
| Hair by Shlér AS | Other services | 2024 |
| Hair by Vidar AS | Other services | 2017 |
| Haircode AS | Wholesale & retail | 2023 |
| Hakk Holding AS | | 2024 |
| Hakkebo Holding AS | Financial services | 2013 |
| Hakkespetten AS | Construction | 2017 |
| Hala Bygg AS | Construction | 2015 |
| Haldens Gate 4 AS | Real estate | 2021 |
| Halifax AS | Information & communication | 2021 |
| Halla Holding AS | Financial services | 2007 |
| Halldal Holding AS | | 2020 |
| Hallico AS | | 2022 |
| Hallset Hage AS | Real estate | 2011 |
| Hallset Legesenter AS | Health & social care | 1994 |
| Hallset Taxi AS | Transport & logistics | 2018 |
| Hallsetreina Fus Barnehage AS | Education | 2018 |
| Hallsettoppen Eiendom AS | Real estate | 2025 |
| Hallstein BB2 Utvikling AS | Real estate | 2025 |
| Hals Business Consulting AS | Education | 2019 |
| Halten Bulk AS | Transport & logistics | 2004 |
| Halten Rådgivning AS | Professional & scientific | 2017 |
| Haltvik Holding AS | | 2025 |
| Halvlitern AS | Hospitality | 2004 |
| Halvor Celius Holding AS | | 2016 |
| Hamborgholding AS | | 2024 |
| Hammer & Kanari Invest AS | | 2023 |
| Hammerdal Invest Da | Real estate | 2001 |
| Hammerfjell AS | Construction | 2022 |
| Hammerfjell Elektro AS | Construction | 2022 |
| Hammerfjell Holding AS | | 2026 |
| Hammerhead Taproom Nordre AS | Hospitality | 2026 |
| Hammerhead Technology AS | | 2022 |