| Gastro Planner AS | Information & communication | 2010 |
| Gat Bygg & Eiendom AS | Construction | 2000 |
| Gatemat AS | Hospitality | 2025 |
| Gaute Baarøy AS | Real estate | 2017 |
| Gavekuratoren AS | | 2026 |
| GB Services AS | Administrative & support | 2015 |
| Gbi Holding AS | Professional & scientific | 2004 |
| GBS Invest AS | | 2021 |
| GC Rieber AS | Manufacturing | 1909 |
| GC Rieber Eiendom AS | Real estate | 1919 |
| GC Rieber Eiendom Drift AS | Real estate | 1984 |
| GC Rieber Eiendom Pluss AS | Real estate | 2004 |
| GC Rieber Eiendom Vekst AS | Real estate | 2025 |
| GC Rieber Fortuna AS | Manufacturing | 2019 |
| GC Rieber Holding AS | Real estate | 1978 |
| GC Rieber Shipping AS | Mining & quarrying | 1990 |
| GC Rieber Shipping Holding AS | Transport & logistics | 2005 |
| Gce Ocean Technology SA | Other services | 2013 |
| Geb AS | Information & communication | 2010 |
| Gedigen Holding AS | Wholesale & retail | 2014 |
| Gefo Eiendom AS | Real estate | 2015 |
| Gefo Rørservice AS | Construction | 2006 |
| Geha Invest AS | Administrative & support | 2012 |
| Geir Angeltveit Holding AS | Transport & logistics | 2020 |
| Geir Ove Holding AS | Real estate | 2020 |
| Geir Skogland Holding AS | | 2025 |
| Geitanuken Holding AS | Information & communication | 2020 |
| Gekri AS | Real estate | 2020 |
| Gel Nails & Wellness Studio AS | Other services | 2021 |
| Gema Revisjon AS | Professional & scientific | 2022 |
| Gemo Capital Consulting Limited Nuf | Real estate | 2008 |
| Gen Norway AS | Professional & scientific | 2015 |
| Geobird Management AS | Professional & scientific | 2000 |
| Geocore AS | Professional & scientific | 2015 |
| Geoit Holding AS | Information & communication | 2025 |
| Georg Andre Gade AS | Financial services | 2007 |
| Georg Huseklepp Agenturer AS | Real estate | 1998 |
| Georgian Re AS | Hospitality | 2025 |
| Gera AS | Professional & scientific | 2023 |
| Gera Family AS | | 2023 |
| Geranium Pratense AS | | 2019 |
| Gerdt Meyer Bruun AS | Real estate | 1913 |
| Get Fat. AS | Professional & scientific | 2020 |
| Gete AS | Financial services | 2005 |
| Gexcon AS | Professional & scientific | 1998 |
| Gexcon Certification AS | Professional & scientific | 2017 |
| Gexcon Solutions AS | Professional & scientific | 2025 |
| GG Consult Og Invest AS | Real estate | 2021 |
| GG Group AS | Wholesale & retail | 2014 |
| GG Möbel AS | Manufacturing | 2016 |
| Gge Holding AS | | 2006 |
| Giambattista AS | Professional & scientific | 2005 |
| Gibonikus AS | | 2022 |
| Gief Epix AS | | 2026 |
| Giga Eiendom AS | Professional & scientific | 2005 |
| Giggs Oil and Gas Services AS | Mining & quarrying | 2016 |
| Gildi Venture Foundry AS | | 2025 |
| Gilja Medisin & Multimedia Nuf | Health & social care | 2005 |
| Gilleshammer Invest AS | | 2013 |
| Gillon Klinikken AS | Health & social care | 2024 |
| Gimal AS | | 2022 |
| Gimlebakken 74-76 AS | Real estate | 2011 |
| Ginius AS | Hospitality | 2012 |
| Ginnungagap AS | Information & communication | 2026 |
| Gio Vin AS | Wholesale & retail | 2018 |
| Gisfry Invest AS | Professional & scientific | 2024 |
| Gish AS | | 2023 |
| Gitarloftet AS | Arts & recreation | 2021 |
| Givmi Group AS | | 2024 |
| Gjedda AS | | 2020 |
| Gjeldsformidling AS | Professional & scientific | 2020 |
| Gjellestad Nordic Holding AS | Information & communication | 2024 |
| Gjensidigegården AS | Real estate | 2010 |
| Gjersvik Senior AS | Professional & scientific | 2025 |
| Gjestaasen AS | Professional & scientific | 2025 |
| Gjesteland AS | Health & social care | 2021 |
| Gjosund Invest AS | | 2025 |
| Gjølanger Settefisk Eiendom AS | Agriculture & fishing | 2012 |
| GK Trading Da | Wholesale & retail | 2008 |
| GKK Consulting AS | Real estate | 2017 |
| Glabella AS | Financial services | 2005 |
| Glamour Fritid AS | Wholesale & retail | 2016 |
| Glass & Karmer Norge AS | Construction | 2014 |
| Glass Og Rammebutikken AS | Wholesale & retail | 1994 |
| Glassmester Jon Hole AS | Financial services | 2000 |
| Glasspaviljongen AS | Hospitality | 2011 |
| Glimt Øyeklinikk Kronstad AS | Health & social care | 2020 |
| Glistrup Holding AS | Real estate | 2005 |
| Glittertind AS | Health & social care | 2020 |
| Global Food GF AS | Wholesale & retail | 2009 |
| Global Food Laksevåg AS | Wholesale & retail | 2019 |
| Global Hobby Og Kunst AS | Wholesale & retail | 2002 |
| Global Petroleum Consulting & Trading , Norway AS | Financial services | 2018 |
| Global Vines AS | Professional & scientific | 2015 |
| Globalmind AS | Wholesale & retail | 2020 |
| Globe Travel AS | Administrative & support | 1998 |
| Globeracer AS | Administrative & support | 2003 |
| Globeracer Entertraining Systems AS | Wholesale & retail | 2012 |
| Gltr Holding AS | | 2021 |
| Glytt AS | Wholesale & retail | 2013 |