| GMC Group AS | Real estate | 2014 |
| GMC Holding AS | Manufacturing | 2014 |
| GMC Hvac AS | Manufacturing | 2018 |
| GMC Junior AS | Real estate | 2013 |
| GMC Junior Invest AS | Real estate | 2016 |
| GMC Kapital AS | Real estate | 2012 |
| GMC Lifting Solutions AS | Manufacturing | 2025 |
| GMC Senior AS | Real estate | 2013 |
| GMC Senior Invest AS | Real estate | 2016 |
| Gnarly AS | Wholesale & retail | 2020 |
| Gneis Holding AS | | 2024 |
| Gneisen 2E AS | Real estate | 2022 |
| Gnist Battery AS | Professional & scientific | 2025 |
| Gnist Energi AS | Professional & scientific | 2024 |
| Gnist Markets AS | Professional & scientific | 2025 |
| Gnist Wind AS | Professional & scientific | 2025 |
| Go Trening Tjensvoll AS | Education | 2023 |
| Go-Ahead Maintenance Norway AS | Manufacturing | 2024 |
| Goagarden AS | Real estate | 2015 |
| Goalgetr AS | Information & communication | 2025 |
| Goalgetr Holding AS | | 2025 |
| God Smak Da | Wholesale & retail | 2000 |
| Godal Invest AS | | 2020 |
| Goddo AS | | 2008 |
| Godeset Investering AS | Real estate | 1999 |
| Godesetdalen 24 AS | Real estate | 2005 |
| Godhet Til Folket AS | Hospitality | 2023 |
| Godsterminalen AS | Transport & logistics | 1987 |
| Godt Gammelt Aksjeselskap | Real estate | 2018 |
| Goe Holding AS | Information & communication | 2021 |
| Goggi AS | Financial services | 2005 |
| Gogi AS | Hospitality | 2007 |
| Gogle Invest AS | Real estate | 2008 |
| Goh Holding AS | | 2022 |
| Gohagen Invest AS | | 2019 |
| Golden Chameleon AS | | 2017 |
| Golden Entertainment AS | Arts & recreation | 2025 |
| Golden Subsea AS | Professional & scientific | 2014 |
| Golf Planet Holding AS | Real estate | 2016 |
| Goo Invest AS | Real estate | 2016 |
| Good Moon AS | Hospitality | 2018 |
| Gorgon Eiendom AS | Real estate | 2012 |
| Gorgon Vaktmesterservice AS | Administrative & support | 2005 |
| Gorostiza Ans Ferdinand Pub | Hospitality | 1990 |
| Gosen Næringsselskap AS | Real estate | 2013 |
| Gotmech AS | Professional & scientific | 2025 |
| Gotrik Holdings AS | | 2022 |
| Gpe AS | Real estate | 2025 |
| GQ Seabed Equipment AS | Administrative & support | 2023 |
| GQS Norge AS | Professional & scientific | 2009 |
| Graa AS | Professional & scientific | 2011 |
| Gradient AS | Information & communication | 2025 |
| Gram AS | Agriculture & fishing | 2022 |
| Gramstad Jensen Advokat AS | Professional & scientific | 2026 |
| Gramstad Jensen Advokatfirma AS | Professional & scientific | 2022 |
| Gramstadhaugen Holding AS | Financial services | 2012 |
| Grand Crew AS | Real estate | 2015 |
| Grand Villa Stavanger AS | Real estate | 2025 |
| Grandvar Holding AS | Health & social care | 2022 |
| Granli Invest AS | Real estate | 2007 |
| Gransan AS | | 2021 |
| Grasholla AS | | 2019 |
| Grasholmbryggå 28C AS | Real estate | 2022 |
| Gratisavissamkjøringen AS | Professional & scientific | 2010 |
| GRAV24 AS | Information & communication | 2022 |
| Gravvann Panorama AS | Real estate | 2007 |
| Grayston Invest AS | Financial services | 2016 |
| GRC Counsel AS | Professional & scientific | 2024 |
| Green 90D AS | Professional & scientific | 2020 |
| Green Electronics AS | Wholesale & retail | 2015 |
| Green Feed Marin AS | Agriculture & fishing | 2021 |
| Green Giraffe AS | | 2022 |
| Green Invest Partners AS | | 2020 |
| Green Oil Company AS | Hospitality | 1998 |
| Green Thai Massasje Og Spa AS | Other services | 2023 |
| Greenco AS | Professional & scientific | 2014 |
| Greener Food AS | Hospitality | 2023 |
| Greenhill Holding AS | Professional & scientific | 2020 |
| Greenlight Stop Ans | Arts & recreation | 2026 |
| Greenpgi AS | Professional & scientific | 2018 |
| Greenwich Group AS | Professional & scientific | 2006 |
| Greger Engineering AS | Professional & scientific | 2020 |
| Gregor AS | Real estate | 2005 |
| Gresk Grill Mariero AS | Hospitality | 2023 |
| Gresseth Consulting AS | Professional & scientific | 2017 |
| Gretchen Krogstadmo Holdings AS | | 2022 |
| Greve Herman Wedel AS | Real estate | 2019 |
| Gridstack AS | Wholesale & retail | 2024 |
| Grimstad Konserves Holding AS | Manufacturing | 2001 |
| Grinde Eiendom AS | Real estate | 1991 |
| Grindstua AS | Real estate | 2008 |
| Grindtun AS | Professional & scientific | 2025 |
| Grindtun Holding AS | Professional & scientific | 2025 |
| Gringott Invest AS | Information & communication | 2022 |
| Gripit AS | Administrative & support | 2012 |
| Grit E-Commerce AS | Wholesale & retail | 2020 |
| Grit Group AS | | 2020 |
| Gro Sande AS | Financial services | 1998 |
| Grucon AS | Professional & scientific | 2025 |
| Grude Drilling AS | | 2023 |