| Gamlebyen Dyreklinikk AS | Professional & scientific | 2023 |
| Gamlebyen Eiendom AS | Real estate | 2021 |
| Gamlebyen Eiendomsinvest AS | | 2021 |
| Gamlebyen Legesenter AS | Health & social care | 2024 |
| Gamlebyen Pub & Bistro Da | Hospitality | 2002 |
| Gamlebyen Rens Og Vask AS | Other services | 2017 |
| Gamlebyen Urtehagen Barnehager AS | Education | 2022 |
| Gamlebyens Maling AS | Wholesale & retail | 2013 |
| Gamlebygg AS | Financial services | 2005 |
| Gamlegrenda Bolig AS | Real estate | 2017 |
| Gamlestølen Drift AS | Hospitality | 1994 |
| Gamleveien 1 AS | Real estate | 2011 |
| Gamleveien 21A Og 21B AS | Real estate | 2025 |
| Gamleveien 32 AS | Real estate | 2007 |
| Gamleveien 80 AS | Real estate | 2015 |
| Gamma Capital AS | Real estate | 2004 |
| Gamma Konstriktor AS | | 2006 |
| Gamma Tech AS | Information & communication | 2014 |
| Gamme AS | Administrative & support | 2005 |
| Gamme Expeditions AS | Administrative & support | 2007 |
| Gamst Invest AS | | 2005 |
| Gamst Lie Invest AS | | 2021 |
| Gandalf & Humlesnurr Invest AS | Information & communication | 2017 |
| Ganddal Butikkeiendom AS | Real estate | 1966 |
| Ganesh AS | Construction | 1989 |
| Ganeshfoto AS | Professional & scientific | 2022 |
| Gange Rolvsg 6 AS | Real estate | 1932 |
| Gange-Rolvs Gate 1 AS | Real estate | 2018 |
| Ganger Rolf AS | Real estate | 2015 |
| Gangnam Korean Restaurant AS | Hospitality | 2015 |
| Gangnes AS | Real estate | 1982 |
| Gangnæs AS | Real estate | 1991 |
| Gangster Holding AS | | 2025 |
| Gangstøklubben Eiendom AS | Real estate | 2020 |
| Ganhar AS | Real estate | 2014 |
| Ganni Norway AS | Wholesale & retail | 2018 |
| Ganske Fint AS | Wholesale & retail | 2014 |
| Gant Effects & Film Services Da | Information & communication | 1993 |
| Gant Store Bogstadveien AS | Wholesale & retail | 1974 |
| Gantzoo Holding Limited | | 2025 |
| Ganzo AS | | 2019 |
| Gaoshing AS | Wholesale & retail | 2007 |
| Gap Gear AS | Professional & scientific | 2024 |
| Gap the Mind Da | Professional & scientific | 2006 |
| Gap Vision AS | Information & communication | 2025 |
| Gapet AS | Hospitality | 2019 |
| Garage D'Or AS | Wholesale & retail | 2013 |
| Garanti AS | Real estate | 2013 |
| Garanti Eiendomsmegling Norge AS | Real estate | 2012 |
| Garanticonsult AS | | 2014 |
| Garantigruppen AS | Financial services | 2021 |
| Garantum Wealth Management Norge AS | Financial services | 2012 |
| Garantum Wealth Management Partners AS | | 2025 |
| Garasjeaksjeselskapet Majorstuveien 12 | Transport & logistics | 1957 |
| Garasjeanlegget Sinsen AS | Real estate | 2008 |
| Garasjehuset Arbosgate 2 AS | Real estate | 1986 |
| Garasjekjeller AS | Professional & scientific | 1984 |
| Garasjelag II - Hovinveien 7-9 SA | Real estate | 2019 |
| Garasjelaget Hovinveien 3-5 SA | Transport & logistics | 1954 |
| Garasjen AS | | 2020 |
| Garasjeplasser AS | Information & communication | 2021 |
| Garasjeselskapet Teisen Vest SA | Real estate | 1955 |
| Garasjevask AS | Administrative & support | 2002 |
| Garbelco AS | Professional & scientific | 1987 |
| Garberg Kristensen Invest AS | Information & communication | 2008 |
| Garbo Norge AS | Wholesale & retail | 1993 |
| Garcia Norway AS | Wholesale & retail | 2013 |
| Gardenlab AS | Wholesale & retail | 2023 |
| Garder Bull Holding AS | | 2020 |
| Garder Consult AS | Professional & scientific | 1991 |
| Garder Invest AS | Professional & scientific | 2005 |
| Garder Investment AS | | 2022 |
| Garderbakken 27 AS | Real estate | 2024 |
| Garderbakken AS | Real estate | 2019 |
| Garderfelts-Bryggene SA | Real estate | 2007 |
| Gardermoen Apartment 1 Ans | Real estate | 1998 |
| Gardermoen Apartment 2 Ans | Real estate | 1998 |
| Gardermoen Cargo Ans | Real estate | 2001 |
| Gardermoen Etatbygg AS | Real estate | 2021 |
| Gardermoen Etatbygg Invest AS | Real estate | 2020 |
| Gardermoen Flight Academy Ans | Real estate | 2004 |
| Gardermoen Holding AS | Real estate | 2013 |
| Gardermoen Investco AS | | 2021 |
| Gardermoen Kunstlager AS | Real estate | 2021 |
| Gardermoen Logistikkbygg AS | Real estate | 2013 |
| Gardermoen Logistikksenter AS | Real estate | 2015 |
| Gardermoen Næringseiendom AS | Real estate | 1999 |
| Gardermoen Næringseiendom KS | Real estate | 1999 |
| Gardermoen Park AS | Real estate | 1997 |
| Gardermoen Prosjektering AS | Professional & scientific | 2019 |
| Gardermoen Technical Base Ans | Real estate | 2001 |
| Gardermofrakt AS | Transport & logistics | 1988 |
| Gardermovegen 5 Utvikling AS | Real estate | 2016 |
| Gardeveien 2 Oslo AS | Real estate | 2025 |
| Gardeveien 2 Parkering AS | Real estate | 2025 |
| Gardex AS | Real estate | 1993 |
| Gardien AS | Construction | 2015 |
| Gardiline | Wholesale & retail | 2002 |
| Gardin Eksperten AS | Wholesale & retail | 1947 |
| Gardågrenda Fritidsutleie AS | Real estate | 2023 |