| Gupta Empire Holding AS | | 2025 |
| Guri Neby AS | Information & communication | 2022 |
| Gurik AS | | 2024 |
| Guro Esposiito AS | | 2026 |
| Guro Grimsgaard AS | Professional & scientific | 2025 |
| Guro Seternes AS | Financial services | 2018 |
| Guro Sommer AS | Professional & scientific | 2026 |
| Guronimo AS | | 2025 |
| Gursli Berg Forlag AS | Information & communication | 2012 |
| Guru IT AS | Information & communication | 2023 |
| Gurudev Invest AS | Wholesale & retail | 2017 |
| Guruprint AS | Professional & scientific | 2008 |
| Gus Invest AS | Professional & scientific | 2018 |
| Gusema AS | | 2020 |
| Gush AS | Financial services | 2005 |
| Gusmar AS | | 2025 |
| Gusmo Holding AS | Financial services | 2017 |
| Gussi Busy AS | | 2024 |
| Gustafssons Fiber & Kabel TV Nuf | Information & communication | 2018 |
| Gustari AS | Financial services | 2005 |
| Gustav Bloms Gate 4-6-8 Holding AS | Real estate | 2024 |
| Gustav Eiendom Drift AS | Construction | 2013 |
| Gustav Holding AS | Real estate | 2013 |
| Gustav Nilsen AS | Arts & recreation | 2016 |
| Gustav Thrane-Steen Holding AS | Real estate | 1993 |
| Gustav Thrane-Steen Invest AS | Real estate | 1998 |
| Gustave & Zero AS | Professional & scientific | 2024 |
| Gustavsberg AS | Wholesale & retail | 2001 |
| Gustavsen Gruppen AS | | 2026 |
| Gustavsson Hedin AS | Construction | 2023 |
| Gustavsson Invest AS | Other services | 2021 |
| Gusten AS | Real estate | 1986 |
| Gusto Tradizionale AS | Administrative & support | 2005 |
| Gutstring Studio AS | Information & communication | 1994 |
| Gutta AS | | 2021 |
| Gutta I Slaget Entreprenør AS | Construction | 2023 |
| Gutta Probygg Entreprenør AS | Construction | 2021 |
| Gutta På Haugen AS | Wholesale & retail | 2010 |
| Gutta Sprut AS | Information & communication | 2024 |
| Guttarundt AS | Administrative & support | 2023 |
| Guttas Campus AS | Education | 2018 |
| Guttas Pubdrift AS | Hospitality | 2011 |
| Guttelus Nettdrift AS | Wholesale & retail | 2016 |
| Guttene Eiendom AS | Real estate | 1975 |
| Guttestreker SA | Arts & recreation | 2016 |
| Guttis AS | Real estate | 2008 |
| Guttormsen Capital AS | Real estate | 2017 |
| Guttulsrud Holding AS | | 2016 |
| Guttulsrud Invest AS | | 2025 |
| Gutu Holding AS | | 2019 |
| Gutzeitsgate 4 AS | Real estate | 2013 |
| Gutzy AS | Professional & scientific | 2026 |
| Guvernørens Holding AS | Financial services | 2018 |
| Guwo AS | Information & communication | 2026 |
| Guz Eiendom AS | Real estate | 2021 |
| GV E3 AS | Real estate | 2015 |
| GV E5 AS | Real estate | 2022 |
| Gvalueinvest AS | Information & communication | 2015 |
| Gvaluetech AS | Information & communication | 2019 |
| Gvein & Kølner Utvikling AS | Professional & scientific | 2005 |
| GVH Holding AS | | 2026 |
| GVN 16 AS | Real estate | 2022 |
| GVN 6 AS | Real estate | 2017 |
| GVS AS | Construction | 2017 |
| GVV Eiendom AS | Real estate | 2021 |
| GW Eiendom AS | Real estate | 2018 |
| GW Invest AS | Financial services | 2008 |
| GWL Holding AS | Arts & recreation | 2025 |
| GWM AS | Information & communication | 2004 |
| GWP-5 AS | | 2020 |
| GWT Gesellschaft Für Wassertechnik Schwimmbad Und Therme GmbH | Construction | 2015 |
| GWW Invest AS | | 2020 |
| Gxo Logistics Norway AS | Transport & logistics | 2024 |
| Gy Invest AS | | 2022 |
| Gyda Eiendom AS | Real estate | 2000 |
| Gyda Invest AS | | 2025 |
| Gydesen Solvang Salg Da | Administrative & support | 1999 |
| Gyger AS | Professional & scientific | 2016 |
| Gygrekjeften AS | Financial services | 2015 |
| Gyl Kraft AS | Energy | 2006 |
| Gyldendal ASA | Wholesale & retail | 1925 |
| Gyldendal Norsk Forlag AS | Information & communication | 1988 |
| Gyldengården AS | Real estate | 2018 |
| Gyldenløve Interiør AS | Professional & scientific | 2022 |
| Gyldenløve Property Invest Norway AS | Real estate | 2006 |
| Gyldenløves Gate 14 Eiendom AS | Real estate | 2014 |
| Gyldenløves Gate 38 AS | Real estate | 2015 |
| Gyldenløves Gate 42 AS | Real estate | 2020 |
| Gyldenløves Gate 48 AS | Real estate | 2013 |
| Gyldenløves Gate 8 Ans | Real estate | 1992 |
| Gyldenløwe Kunsthandel AS | Wholesale & retail | 1991 |
| Gyljandi AS | Financial services | 2005 |
| Gyllenbuste AS | Real estate | 2024 |
| Gyllene Tider AS | Professional & scientific | 2018 |
| Gylne Tider Invest AS | Information & communication | 2012 |
| Gylseth Invest AS | Information & communication | 2018 |
| Gyltenäs Consult & Holding AS | | 2021 |
| Gylver Holding AS | Professional & scientific | 2023 |
| Gym City Moss AS | Professional & scientific | 2022 |
| Gymbutikken AS | Wholesale & retail | 2016 |