| Glomma Tannklinikk AS | Health & social care | 2020 |
| Glommafestivalen AS | Arts & recreation | 1998 |
| Glowing Holding AS | | 2022 |
| Glød AS | Other services | 2014 |
| Go Worldwide AS | Administrative & support | 2014 |
| Godslip Holding AS | | 2018 |
| Godt Foreldresamarbeid Da | Education | 2024 |
| Godthåb Holding AS | Real estate | 2008 |
| Golax AS | Manufacturing | 2006 |
| Golden Touch Film AS | Information & communication | 2010 |
| Golden Touch Media AS | Information & communication | 2017 |
| GP Autosalg AS | Wholesale & retail | 2021 |
| Gram AS Nuf | Wholesale & retail | 2015 |
| Grand Café Hankøsundet AS | Hospitality | 2026 |
| Grand Terrasse AS | Real estate | 2019 |
| Great White Holding AS | Professional & scientific | 2010 |
| Green Room AS | | 2023 |
| Greenleaf Accounting AS | Professional & scientific | 2026 |
| Greenroom Da | Information & communication | 2007 |
| Gressdal Invest AS | Financial services | 2018 |
| Gressvik Bilpleie & Bilsalg AS | Other services | 2013 |
| Gressvik Eiendom AS | Real estate | 2006 |
| Gressvik Properties AS | Real estate | 2020 |
| Gressvik Service Senter AS | Wholesale & retail | 1992 |
| Gressvik Torg 22 AS | Real estate | 2018 |
| Gressvik Torg AS | Real estate | 2022 |
| Greystone Capital AS | | 2019 |
| Grid.One Sim Racing AS | Wholesale & retail | 2026 |
| Griff Kommunikasjon AS | Professional & scientific | 2004 |
| Grit Invest AS | Wholesale & retail | 2012 |
| Growup AS | Professional & scientific | 2018 |
| Grundborg AS | Wholesale & retail | 2013 |
| Grundvig Holding AS | Financial services | 2007 |
| Grydeland Eiendom AS | Real estate | 2007 |
| Grydeland Holding AS | Real estate | 2005 |
| Grøholt Invest AS | | 2025 |
| Grønn Bolig Norge AS | Professional & scientific | 2012 |
| Grønnbolig AS | Construction | 2014 |
| GT Profilering AS | Manufacturing | 2021 |
| Gt's Bar AS | Hospitality | 2025 |
| Gtfb AS | Real estate | 2025 |
| Gudrun AS | Manufacturing | 2019 |
| Gulshagen IV AS | | 2020 |
| Gulvslipergutta Bygg AS | Construction | 2022 |
| Gunnar Bøckmann AS | Financial services | 2005 |
| Gunnar Nilsens Gate Eiendom AS | Real estate | 2018 |
| Gunnar Syversen Eiendom AS | Real estate | 2019 |
| Gunnar Syversen Holding AS | Real estate | 2019 |
| Gustavsen Holding AS | Real estate | 2023 |
| Guttulsrød Advisory AS | Professional & scientific | 2025 |
| Gv-North Invest AS | | 2025 |
| Gyldenfeldt AS | Real estate | 2019 |
| Gyn-Kasin AS | Health & social care | 2025 |
| H & L Næringsbygg AS | Real estate | 2024 |
| H a Johannessen AS | Construction | 2013 |
| H a Johannessen Eiendom AS | Construction | 1996 |
| H H Interiør Mur AS | Construction | 2019 |
| H.A. Holding AS | | 2024 |
| H.A. Johannessen Holding AS | Construction | 2013 |
| Haakensen Blomster AS | Wholesale & retail | 2016 |
| Haas 2 AS | | 2023 |
| Haas AS | Real estate | 2021 |
| Habito AS | Wholesale & retail | 2025 |
| Hackstad AS | Administrative & support | 2017 |
| Hafjell Hytteutleie AS | Real estate | 1986 |
| Hagelin Byggservice AS | Construction | 2023 |
| Hagelin Holding AS | | 2025 |
| Halden Ventilasjon AS | Construction | 2025 |
| Hallgeir Arnesen AS | Transport & logistics | 1996 |
| Halo Consult AS | Professional & scientific | 2022 |
| Hama Rørleggerservice AS | Construction | 2019 |
| Hammarstrøm Import Da | Wholesale & retail | 1988 |
| Hammerstad Maskin AS | Construction | 1998 |
| Hampshire Advisory AS | Professional & scientific | 2021 |
| Handegård Arkitektur AS | Professional & scientific | 2012 |
| Handyman Østfold AS | Wholesale & retail | 2012 |
| Hanoma Holding AS | Financial services | 2006 |
| Hans Kjøstelsen Eiendom AS | Real estate | 1989 |
| Hans Kjøstelsen Farvehandel AS | Wholesale & retail | 2016 |
| Hans Kjøstelsen Holding AS | Wholesale & retail | 2015 |
| Hans Nielsen Hauge Videregående Skole AS | Education | 2003 |
| Hansen & Hansen Holding AS | Wholesale & retail | 2024 |
| Hansen & Levvel Eiendom AS | Real estate | 2024 |
| Happy Made AS | Wholesale & retail | 2017 |
| Harald Perskaas AS | Real estate | 2003 |
| Harper Studio AS | Wholesale & retail | 2021 |
| Harvey Invest AS | | 2008 |
| Hashi Renholdsservice AS | Administrative & support | 2013 |
| Haspro Holding AS | Financial services | 2005 |
| Hassingen Apotek AS | Wholesale & retail | 2020 |
| Hassingen Bygg AS | Construction | 2020 |
| Hato-Invest AS | Real estate | 2021 |
| Haugen Samspill AS | | 2026 |
| HDW AS | Professional & scientific | 2025 |
| He Amigos Da | Hospitality | 2025 |
| He Madsen Eiendom AS | Real estate | 2021 |
| Heatgreener AS | | 2024 |
| Heddas Kjøkkendrift Da | Hospitality | 2001 |
| Heilt Klart AS | | 2026 |
| Heim Fredrikstad AS | Hospitality | 2017 |