| Grilstad Energi AS | Energy | 2012 |
| Grilstad Gård Utbyggingsselskap AS | Real estate | 2011 |
| Grilstad Marina AS | Real estate | 2007 |
| Grilstad N8 AS | Real estate | 2020 |
| Grilstadfjæra 1 AS | Construction | 2009 |
| Grilstadporten AS | Real estate | 2009 |
| Grilstadvegen 1 AS | Real estate | 2021 |
| Grim Robot AS | Information & communication | 2015 |
| Grindskarhaugen Utvikling AS | | 2022 |
| Grip Klatring AS | Arts & recreation | 2018 |
| Grip Leangen AS | Arts & recreation | 2016 |
| Grip Sluppen AS | Arts & recreation | 2019 |
| Grip Vegg AS | Administrative & support | 2022 |
| Gripz Supplements Da | Wholesale & retail | 2024 |
| Gro Lager AS | Wholesale & retail | 2010 |
| Groeset Investment AS | | 2020 |
| Groette Rost Holding AS | Professional & scientific | 2022 |
| Grong Budservice Investment AS | Transport & logistics | 2022 |
| Grotdal Holding AS | Information & communication | 2020 |
| Grovassbakk Holding AS | | 2024 |
| Grovegrove AS | Information & communication | 2024 |
| Growgrow AS | Professional & scientific | 2012 |
| GRS Holding AS | | 2023 |
| Grta Holding AS | Arts & recreation | 2022 |
| Grua Eiendom AS | Real estate | 2007 |
| Grupo Nordico AS | | 2015 |
| Gry Møller Invest AS | | 2022 |
| Grythatten AS | | 2020 |
| Gråbein Studio AS | Information & communication | 2024 |
| Gråhø Holding AS | Professional & scientific | 2007 |
| Gråkallen Vinterpark AS | Arts & recreation | 2015 |
| Gråmann AS | Real estate | 1993 |
| Gråmølna AS | Real estate | 1999 |
| Grødemtorget AS | Real estate | 2006 |
| Grønland 64 AS | Real estate | 2008 |
| Grønlia Drift AS | Hospitality | 2012 |
| Grønn 1 AS | Real estate | 2026 |
| Grønn Aktivitet AS | Real estate | 2020 |
| Grønn Dyrehelse AS | Professional & scientific | 2021 |
| Grønn Energi Klima AS | Professional & scientific | 2018 |
| Grønn Energi Midt-Norge AS | Construction | 2010 |
| Grønn Energi Vestlandet AS | Construction | 2026 |
| Grønn Energi Østlandet AS | Construction | 2026 |
| Grønn Service AS | Administrative & support | 2021 |
| Grønn Spire AS | Other services | 2012 |
| Grønn.Støtte AS | Information & communication | 2024 |
| Grønnberg Holding AS | | 2025 |
| Grønnere AS | Administrative & support | 2006 |
| Grønnerøe AS | Professional & scientific | 1999 |
| Grønningen Invest AS | Real estate | 1993 |
| Grønt Anlegg AS | Administrative & support | 2022 |
| Grønt Hjerte AS | Energy | 2020 |
| Grønt Hjerte Partner AS | Energy | 1993 |
| Grønt Hjerte Utvikling AS | Professional & scientific | 2021 |
| Grønt Hjerte Varme AS | Energy | 2021 |
| Grønt Holdning AS | Administrative & support | 2022 |
| Grøtte Og Reitan Ans | | 1991 |
| GS Energy Norway AS | Professional & scientific | 2013 |
| GS Venture AS | Professional & scientific | 2015 |
| Gsa AS | Professional & scientific | 2008 |
| Gsa Holding AS | Real estate | 2011 |
| GSB AS | | 2019 |
| GST Consult AS | Information & communication | 2025 |
| GTD Holding AS | Real estate | 2007 |
| GTF Invest AS | | 2022 |
| GTP AS | Professional & scientific | 2019 |
| GTS Drilling Consulting AS | Mining & quarrying | 2016 |
| Gudmund Haagensli Holding AS | | 2023 |
| Guell AS | Financial services | 2013 |
| Guerrero Holding AS | | 2023 |
| Gufa AS | Hospitality | 2013 |
| Gul Arkitekter AS | Professional & scientific | 2024 |
| Guldahl Invest AS | | 2021 |
| Guldseth Holding AS | | 2022 |
| Guldsten Holding AS | Health & social care | 2005 |
| Gull Og Ur Innkjøp AS | Wholesale & retail | 2016 |
| Gullaksen Eiendom AS | Real estate | 1997 |
| Gullaksen Holding AS | Wholesale & retail | 2005 |
| Gulli Utvikling AS | Real estate | 2008 |
| Gulli Vegservice AS | Real estate | 2021 |
| Gullinbursti Holding AS | | 2022 |
| Gullokk AS | Manufacturing | 2023 |
| Gullsmed Aas AS | Wholesale & retail | 2016 |
| Gullsmed Dahlsveen AS | Wholesale & retail | 1993 |
| Gullsmed Karlgård AS | Manufacturing | 2006 |
| Gullvin AS | | 2022 |
| Gulosen Eiendom AS | Real estate | 2007 |
| Gulvlegger Anders Jaberg AS | Construction | 2018 |
| Gunder Invest AS | Information & communication | 2013 |
| Gunhild Kveine AS | Financial services | 2005 |
| Gunnar Arild Helland Holding AS | | 2025 |
| Gunnar Nilsen AS | Construction | 1998 |
| Gunnar Ree AS | Wholesale & retail | 1983 |
| Gunners Holding AS | Financial services | 2016 |
| Gunnesmæl Invest AS | Real estate | 2012 |
| Gunnfalk Holding AS | Hospitality | 2022 |
| Gurman AS | Hospitality | 2023 |
| Guro Holding AS | Real estate | 2020 |
| Gus Bolig AS | Real estate | 2024 |
| Gutricious AS | Wholesale & retail | 2025 |