| G7 Invest AS | Wholesale & retail | 2009 |
| Gaard Invest AS | Financial services | 2018 |
| Galant Klesbutikk AS | Wholesale & retail | 2025 |
| Galaxy Grillen AS | Hospitality | 2012 |
| Galleri Athene AS | Wholesale & retail | 2024 |
| Gallestien Persiske Møbler Ans | Wholesale & retail | 1997 |
| Galosh Property AS | Real estate | 2022 |
| Gam Eiendom AS | Real estate | 2000 |
| Gam Holding AS | Wholesale & retail | 2005 |
| Gamasama AS | Wholesale & retail | 1995 |
| Gambino Holding AS | | 2022 |
| Gamborgs Vei 6 AS | Real estate | 2022 |
| Gamle Kirkeplass 3 Ans | Real estate | 2005 |
| Gamle Riksvei 228 AS | Real estate | 2018 |
| Gamle Riksvei 237 AS | Real estate | 1986 |
| Gamlebyen Bakst Da | Manufacturing | 2026 |
| Gamlegården Verksveien 8 AS | Real estate | 2020 |
| Gamleveien 4 AS | Real estate | 2022 |
| Gamsør AS | Real estate | 2018 |
| Gapge AS | Financial services | 2013 |
| Gapit Nordics AS | Information & communication | 2016 |
| GARNETT ANS Turid og Kjell I Engebretsen | Wholesale & retail | 1987 |
| Gartneritomta Boligutvikling AS | Real estate | 2024 |
| Garvang Holding AS | Health & social care | 2020 |
| Garås Vannverk SA | Water & waste | 2019 |
| Gasolin Drammen AS | Real estate | 2010 |
| Gass Og Varmedesign AS | Wholesale & retail | 2017 |
| Gassmann AS | Wholesale & retail | 2002 |
| Gateway Stainless AS | Wholesale & retail | 2019 |
| Gav Holding AS | | 2020 |
| Gave Engros AS | Wholesale & retail | 2023 |
| Gaveagenturet Drammen AS | Wholesale & retail | 1992 |
| Gazelle Development AS | Wholesale & retail | 2005 |
| GB Invest AS | | 2021 |
| Gba Bygg AS | Construction | 2015 |
| GCP Aqua AS | Professional & scientific | 2024 |
| GCP Packaging AS | Professional & scientific | 2024 |
| GCP Technology AS | Wholesale & retail | 2022 |
| GDR Invest AS | Manufacturing | 2020 |
| Geek Invest AS | | 2020 |
| Geertz Holding AS | Wholesale & retail | 2005 |
| Geir Asbjørn Dahl AS | Real estate | 2012 |
| Geir Fanuelsen Transport AS | Transport & logistics | 1992 |
| Geir Vevle Invest Limited Nuf | Professional & scientific | 2009 |
| Geneever AS | Professional & scientific | 2020 |
| General Management Group AS | Information & communication | 2023 |
| Generix Consulting AS | Professional & scientific | 2025 |
| Geokart AS | Professional & scientific | 2016 |
| Geokontroll AS | Professional & scientific | 2018 |
| Geokraft AS | Energy | 2022 |
| GFD Green AS | Professional & scientific | 2020 |
| Ghuman Holding AS | | 2016 |
| Gilhusbukta Sjøgrunn AS | Real estate | 2009 |
| Gilhusveien 10 AS | Real estate | 1992 |
| Gim Holding AS | | 2026 |
| Gimlegruppen AS | Professional & scientific | 2010 |
| Gintex AS | Wholesale & retail | 2021 |
| Gjellebekkstubben 14 AS | Real estate | 2017 |
| Gjellebekkstubben 8 AS | Real estate | 2010 |
| Gjellebekkstubben Eiendom AS | Real estate | 2022 |
| Gjendesign AS | Professional & scientific | 2025 |
| Gjenspinn AS | Wholesale & retail | 2026 |
| Gjerpen Garasje AS | Real estate | 2026 |
| Gjestemoen Invest AS | Professional & scientific | 2021 |
| Gjno AS | Wholesale & retail | 2014 |
| GL Interests Norway AS | Professional & scientific | 2020 |
| Glade Minner AS | Professional & scientific | 2016 |
| Glamspace AS | Other services | 2024 |
| Glassmester Olsen AS | Construction | 2022 |
| Glassverket AS | Real estate | 2005 |
| Glattisen Fisk AS | Wholesale & retail | 2025 |
| Gleisner Holding AS | | 2021 |
| Glimr AS | Wholesale & retail | 2020 |
| Glitra Drift AS | Other services | 2019 |
| Glitra Finans AS | Real estate | 2021 |
| Glitra Holding AS | Real estate | 2020 |
| Glitre AS | Real estate | 2011 |
| Glitre Bolig AS | Real estate | 2015 |
| Glitre Eiendom AS | Real estate | 2012 |
| Glitre Nett AS | Energy | 2001 |
| Global Admin AS | Education | 2019 |
| Global Consult AS | Professional & scientific | 2012 |
| Global Consulting Sustainability AS | Professional & scientific | 2019 |
| Globalvoice AS | Information & communication | 2008 |
| Globalvoice Holding AS | Information & communication | 2017 |
| Gloves Holding AS | Professional & scientific | 2020 |
| Glowinski AS | | 2021 |
| Gløtte Invest AS | Financial services | 2005 |
| GM Inovation AS | Wholesale & retail | 2013 |
| GM Mesterbygg AS | Construction | 2025 |
| Gmagi AS | Real estate | 2022 |
| Gmnb Consulting AS | Information & communication | 2018 |
| Gmnb Group AS | Information & communication | 2017 |
| Gnist Kompetanse AS | Professional & scientific | 2022 |
| Go'Bakst AS | Manufacturing | 2021 |
| God Tekst AS | Arts & recreation | 2026 |
| Godard Holding AS | Real estate | 2005 |
| Gode Hjem AS | Real estate | 1994 |
| Gode Hus AS | Real estate | 2016 |
| Gofish AS | Information & communication | 2026 |