| Greenside AS | Professional & scientific | 2021 |
| Grethe Blakstad Andersen Frisør AS | Other services | 2020 |
| Grev Wedelsgate 10 Parkering AS | Real estate | 2016 |
| Grid Eiendom AS | Real estate | 2020 |
| Grimstadgata 11 AS | Real estate | 2018 |
| Gripr AS | Information & communication | 2017 |
| Grom Holding AS | Health & social care | 2016 |
| Ground Control Solutions AS | Information & communication | 2024 |
| Grubbestad AS | Financial services | 2008 |
| Grubbestad Gård AS | Agriculture & fishing | 2015 |
| Grubesand AS | Real estate | 1997 |
| Gråkamveien 10 AS | Real estate | 2011 |
| Grøndalen-Olsen Invest AS | | 2021 |
| Grønn Gren AS | Manufacturing | 2005 |
| Grøtberg Engineering AS | Professional & scientific | 2025 |
| Grøterud Stillas AS | Other services | 2016 |
| GS Gruppen AS | Real estate | 2015 |
| GSM Telecom Products AS | Wholesale & retail | 2012 |
| GSM Towers AS | Wholesale & retail | 2017 |
| GT Consult AS | Professional & scientific | 2022 |
| GT Innovation AS | Professional & scientific | 2015 |
| GTH AS | Health & social care | 2012 |
| GTM Bygg AS | Construction | 2020 |
| GTT Invest AS | Real estate | 2021 |
| Guahlos Holding AS | Real estate | 2005 |
| Guard Automation AS | Information & communication | 1982 |
| Guardex AS | Wholesale & retail | 2024 |
| Gudelis Holding AS | Real estate | 2014 |
| Gullgravern AS | Construction | 2005 |
| Gullik Gulliksen AS Landskapsarkitekter Mnla | Professional & scientific | 1987 |
| Gullsaksen AS | Other services | 2015 |
| Gullsmed a G Haakonsen AS | Wholesale & retail | 1986 |
| Gulsten AS | Information & communication | 2017 |
| Gultech AS | Information & communication | 2020 |
| Gunillas Helsekost AS | Wholesale & retail | 1995 |
| Gurrik Invest AS | | 2019 |
| Guru-Kalas AS | | 2024 |
| Gurusoft AS | Information & communication | 2007 |
| Gustav Norge AS | Wholesale & retail | 2011 |
| Gutta På Taket AS | Construction | 2023 |
| Guvaagbygget AS | Real estate | 2023 |
| Gymate Group Ans | Wholesale & retail | 2022 |
| H Skjelbred AS | Real estate | 2016 |
| H Stickler & Co AS | Real estate | 1953 |
| H Trading AS | Wholesale & retail | 2012 |
| H-C Eiendom AS | Real estate | 2021 |
| H-Pet Ans | | 1989 |
| H. T. Vike AS | Construction | 2012 |
| H2 Prosjekt AS | Real estate | 2011 |
| Haga Panorama AS | Real estate | 2021 |
| Hagall AS | Professional & scientific | 2013 |
| Hagaløkka Utvikling AS | Real estate | 2021 |
| Hagaløkka Va-Anlegg SA | Water & waste | 1992 |
| Hage Og Landskapsservice AS | Administrative & support | 2017 |
| Hagia Gruppen AS | Administrative & support | 2009 |
| Haglund AS | | 2019 |
| Haglund Invest AS | Real estate | 2018 |
| Hair Concept AS | Other services | 2021 |
| Hall Montasje AS | Construction | 2017 |
| Halvdan Svartesgt. 24 AS | Real estate | 2024 |
| Halvor Thorsnes AS | Information & communication | 2021 |
| Hambri AS | Financial services | 2005 |
| Hamburgati AS | Hospitality | 2023 |
| Hamilton AS | Professional & scientific | 1987 |
| Hamilton Capital AS | Financial services | 2009 |
| Hamilton Helse AS | Health & social care | 2019 |
| Hammerfolket AS | Professional & scientific | 2026 |
| Hamre Invest AS | | 2021 |
| Hamsters Auto AS | Other services | 2021 |
| Hanasand Eiendom AS | Wholesale & retail | 2006 |
| Hanasand Holding AS | Wholesale & retail | 2006 |
| Handelseiendom Invest AS | Real estate | 2017 |
| Handelseiendom Sagmyra AS | Real estate | 2005 |
| Handelseiendom Vågsbygd AS | Real estate | 2018 |
| Handleriet Asnes AS | Wholesale & retail | 2001 |
| Hangarveien 21B AS | Construction | 2015 |
| Hangarveien 7 Eiendom AS | Real estate | 1997 |
| Hannah Invest AS | | 2023 |
| Hanne Jørgensen Holding AS | Real estate | 2007 |
| Hannis AS | | 2025 |
| Hans Jørgen Sandnes AS | Arts & recreation | 2013 |
| Hans O Auensen Holding AS | | 2024 |
| Hansa Toy Norge AS | Wholesale & retail | 2013 |
| Hansen Og Thorsen Invest AS | Administrative & support | 2021 |
| Har Holding AS | | 2019 |
| Haraldsen Holding AS | | 2022 |
| Haraldsvik Bygg AS | Construction | 2026 |
| Harbo Signature AS | | 2013 |
| Hardang Holding AS | | 2023 |
| Hardcore Invest AS | Wholesale & retail | 2005 |
| Haretoppen AS | | 2020 |
| Harsheim Invest AS | | 2026 |
| Harstad Brukthandel AS | Wholesale & retail | 2020 |
| Haru AS | Wholesale & retail | 2009 |
| Has Services AS | Other services | 2022 |
| Hasle Aviation AS | Real estate | 2021 |
| Hasle Eiendom AS | Real estate | 2004 |
| Hasle Kapital AS | Information & communication | 2020 |
| Hasle Kran Og Trefelling AS | Agriculture & fishing | 2020 |
| Haslebakken Eiendom AS | Real estate | 2003 |