| Gullgubber AS | | 2023 |
| Gullhaug Torg 3 AS | Real estate | 2000 |
| Gullhaug Utvikling AS | Real estate | 2024 |
| Gullhaugen Eiendom AS | Real estate | 1989 |
| Gullhaugv. 1-3 AS | Real estate | 2022 |
| Gullhaugveien 7 AS | Real estate | 2014 |
| Gullhaugveien 9-13 AS | Real estate | 2006 |
| Gullhender AS | Construction | 2023 |
| Gullhus AS | Wholesale & retail | 2026 |
| Gulli & Rokk AS | Financial services | 1989 |
| Gulli Invest AS | Real estate | 1994 |
| Gullik Holding AS | Professional & scientific | 2018 |
| Gullikollen AS | | 2018 |
| Gulliksen & Gjerde AS | Education | 2015 |
| Gullivers Travels AS | Administrative & support | 2025 |
| Gulliåsen Eiendomsutvikling AS | Real estate | 2023 |
| Gullkammen AS | Real estate | 2006 |
| Gullklump AS | | 2021 |
| Gullkorn AS | Financial services | 2004 |
| Gullkroken Invest AS | Professional & scientific | 2013 |
| Gullmester Bemilla AS | Real estate | 2008 |
| Gullmo AS | Financial services | 1958 |
| Gullmopp Da | Administrative & support | 2026 |
| Gullmund Invest AS | Real estate | 2013 |
| Gullnummer AS | Wholesale & retail | 2014 |
| Gulloy AS | | 2023 |
| Gullpaarull AS | Wholesale & retail | 2025 |
| Gullpartner AS | Professional & scientific | 2025 |
| Gullreka AS | Arts & recreation | 2012 |
| Gullsaks Barbershop AS | Other services | 2020 |
| Gullskatten Holding AS | | 2025 |
| Gullsmed Fjell Avd. Majorstuen AS | Manufacturing | 2026 |
| Gullsmed Kaulum Byporten AS | Wholesale & retail | 1992 |
| Gullsykkelen AS | Other services | 2022 |
| Gulltind AS | Real estate | 2018 |
| Gullturné AS | Wholesale & retail | 2025 |
| Gullverket AS | Professional & scientific | 2026 |
| Gullvik Invest AS | | 2021 |
| Gulset Butikkeiendom AS | Real estate | 1999 |
| Gulseth Eiendom AS | Real estate | 2024 |
| Gulseth Holding AS | | 2024 |
| Gulskogen Stasjon 1 Bolig AS | | 2025 |
| Gulskogen Stasjon 2 Bolig AS | Real estate | 2025 |
| Gulskogen Stasjon 3 Bolig AS | Real estate | 2025 |
| Gulskogen Stasjon 4 Bolig AS | | 2025 |
| Gulskogen Stasjon 5 Bolig AS | Real estate | 2025 |
| Gulsrud Holding AS | | 2018 |
| Gult Hus Og Stormende Jubel AS | Wholesale & retail | 2002 |
| Gult Kort for Holding AS | | 2021 |
| Gulv Og Sparkel AS | Construction | 2010 |
| Gulv Renovererne AS | Construction | 2024 |
| Gulvdesign & Varme AS | Construction | 2026 |
| Gulvdoktor AS | Administrative & support | 1991 |
| Gulvkompagniet AS | Wholesale & retail | 1988 |
| Gulvmagasinet AS | Wholesale & retail | 2025 |
| Gulvmeteren Da | Construction | 2001 |
| Gulvtech Prosjekt AS | Administrative & support | 1988 |
| Gum Box AS | Wholesale & retail | 2025 |
| Gumman Holding AS | | 2022 |
| Gumøy Golf AS | Arts & recreation | 1999 |
| Gunda Holding AS | Administrative & support | 2005 |
| Gundelach AS | Arts & recreation | 2016 |
| Gundersen & Løken AS | Wholesale & retail | 1979 |
| Gundersen & Løken Optikk Røa AS | Wholesale & retail | 2023 |
| Gundersen Collection Fine Art AS | Wholesale & retail | 2020 |
| Gundersen-Jose AS | Professional & scientific | 2023 |
| Gundesø Invest AS | Real estate | 2007 |
| Gunerius Pettersen AS | Professional & scientific | 1967 |
| Gunerius Sko AS | Wholesale & retail | 1997 |
| Gungnir AS | Professional & scientific | 2018 |
| Gungnir Investments AS | Professional & scientific | 2016 |
| Gunguns Gull AS | | 2024 |
| Gunmountain Raceinvest AS | | 2023 |
| Gunnar Bugge Assuranceforretning AS | Financial services | 1990 |
| Gunnar Greve Rights AS | Arts & recreation | 2022 |
| Gunnar Henden Holding AS | | 2022 |
| Gunnar Kind AS | Professional & scientific | 2001 |
| Gunnar Kvalheim AS | Professional & scientific | 2018 |
| Gunnar L Hansen Og Sønn Da | Construction | 1951 |
| Gunnar Landgraff AS | Wholesale & retail | 1955 |
| Gunnar Nilsens Gate 25 AS | Real estate | 2013 |
| Gunnar Ruud Catering AS | Hospitality | 2000 |
| Gunnar Ruud Eiendom AS | Real estate | 1947 |
| Gunnar Ruud Invest AS | Real estate | 2005 |
| Gunnar Schjelderups Vei 11 AS | Real estate | 2000 |
| Gunnar Stenberg Eiendom AS | Real estate | 1996 |
| Gunnar Øye AS | Wholesale & retail | 1974 |
| Gunnarro AS | Information & communication | 2022 |
| Gunnars Holding AS | Wholesale & retail | 2020 |
| Gunners Invest AS | | 2008 |
| Gunstig Larsen Gjenbruk AS | Professional & scientific | 2022 |
| Gunthebass Invest AS | | 2020 |
| Gunvor International B.V. Nuf | Wholesale & retail | 2026 |
| Guordas Kunst AS | Arts & recreation | 2021 |
| Guos AS | Professional & scientific | 2021 |
| Gupex AB Nuf | Construction | 2008 |
| Gupex AS | Construction | 1987 |
| Guppi AS | Professional & scientific | 2005 |
| Guppyworks Norway AS | Information & communication | 2006 |
| Gupta Consulting AS | Professional & scientific | 2020 |