| Grieg Maritime Group AS | Administrative & support | 2020 |
| Grieg Maturitas AS | Agriculture & fishing | 1962 |
| Grieg Maturitas II AS | Agriculture & fishing | 2012 |
| Grieg Medialog AS | Manufacturing | 1997 |
| Grieg Seafood ASA | Agriculture & fishing | 1988 |
| Grieg Seafood Farming AS | Agriculture & fishing | 2025 |
| Grieg Seafood Rogaland AS | Agriculture & fishing | 1986 |
| Grieg Seafood Sales AS | Wholesale & retail | 2020 |
| Grieg Shipholding AS | Administrative & support | 2007 |
| Grieg Shipowning AS | Administrative & support | 2000 |
| Grieg Shipping II AS | Administrative & support | 1970 |
| Grieg Star 2017 AS | Administrative & support | 2017 |
| Grieg Star AS | Administrative & support | 1982 |
| Grieg Star Bulk AS | Administrative & support | 2011 |
| Grieg Star Bulk Pool AS | Administrative & support | 2020 |
| Grieg Star Oh Pool AS | Administrative & support | 2019 |
| Grieg-Larsen Holding AS | | 2025 |
| Grieghallen AS | Real estate | 1968 |
| Grieghallen Parkering AS | Transport & logistics | 2004 |
| Grieghallen Parkering II AS | Transport & logistics | 2016 |
| Grieghallen Utbygging AS | Real estate | 2021 |
| Grimm Aevum AS | | 2024 |
| Grimstadneset Prosjekt AS | Real estate | 2012 |
| Grindheimholding AS | | 2023 |
| Grini Consulting AS | Professional & scientific | 1986 |
| Grip Agency AS | Wholesale & retail | 2024 |
| Grizzlyfrog AS | Information & communication | 2024 |
| Gro Pro AS | Wholesale & retail | 2024 |
| Groft AS | Professional & scientific | 2023 |
| Grotlo Holding AS | | 2022 |
| Grov Sykkel AS | Other services | 2023 |
| Grow Competence Consulting AS | Professional & scientific | 2006 |
| Gruco AS | Real estate | 2005 |
| Gruer AS | | 2021 |
| Grunderiet AS | | 2025 |
| Grung Arkitektur AS | Professional & scientific | 2007 |
| Gruus AS | Information & communication | 2025 |
| Grød Invest AS | | 2022 |
| Grønbæk Holding AS | Information & communication | 2018 |
| Grønhaug Retail AS | Wholesale & retail | 1998 |
| Grønland 36 AS | Real estate | 2004 |
| Grønn Bygård AS | Professional & scientific | 2019 |
| Grønn Gnist Eiendom AS | Real estate | 2023 |
| Grønn-Nielsen Arkitektur Og Bygg AS | Professional & scientific | 2026 |
| Grønnestølsveien 12 AS | Real estate | 2017 |
| Grønnevik Holding AS | Professional & scientific | 2005 |
| GS Dùklagnir SLF | Construction | 2010 |
| GS Energi AS | Professional & scientific | 2023 |
| GS Invest Og Forvaltning AS | Real estate | 2017 |
| Gsgroup Holding AS | Information & communication | 2023 |
| Gsperformance AS | Wholesale & retail | 2025 |
| GT 445 Holding AS | | 2023 |
| Gto Solutions AS | Information & communication | 2025 |
| GTP Norge AS | Administrative & support | 2019 |
| Guangdong House AS | Hospitality | 2008 |
| Guided Fjord Tours AS | Administrative & support | 2019 |
| Guilty AS | Information & communication | 2015 |
| Guilty Invest AS | Information & communication | 2021 |
| Guilty Tech AS | Information & communication | 2017 |
| Guitarish AS | Other services | 2018 |
| Gul Invest AS | Real estate | 2022 |
| Guldbrandsøy Eiendommer AS | Real estate | 2020 |
| Gulen IV AS | | 2020 |
| Gullblokken AS | Real estate | 2015 |
| Gullbotn Konferansesenter AS | Real estate | 2026 |
| Gullgran AS | Real estate | 2023 |
| Gullsmed Per Vigeland AS | Wholesale & retail | 2019 |
| Gullspire AS | | 2025 |
| Gullstølsbotn SA | Real estate | 1999 |
| Guma AS | Hospitality | 2024 |
| Gungne Holding AS | | 2019 |
| Gunners AS | Real estate | 2005 |
| Gunvordal Fysioterapi AS | Health & social care | 2014 |
| Gurvinvest AS | Real estate | 2004 |
| Gusten Invest AS | Professional & scientific | 2008 |
| Gusto AS | Wholesale & retail | 2024 |
| Gutane Eiendom AS | Real estate | 2024 |
| Gutta Bak Skjermen Da | Administrative & support | 2024 |
| Guttakrutt Holding AS | | 2025 |
| GV Eiendomsutvikling AS | Real estate | 2016 |
| GV Investment AS | | 2023 |
| GV Solution AS | Professional & scientific | 2023 |
| Gynekolog Engelsen AS | Health & social care | 2018 |
| Gyros House Hollendergaten 5 AS | Hospitality | 2024 |
| Gyros House V/T AS | Hospitality | 2023 |
| Gågaten Eiendom AS | Real estate | 2003 |
| Gården Rørleggerservice AS | Construction | 1989 |
| Gården Senter AS | Real estate | 1988 |
| Gårdskraft AS | Energy | 2022 |
| Gåsemyr Magnus Invest AS | | 2022 |
| Gærning Holding AS | | 2024 |
| Gørbitz' Gate 12 AS | Real estate | 2025 |
| Gøtne AS | | 2019 |
| H Automasjon AS | Construction | 2023 |
| H Gangdal Holding AS | | 2020 |
| H Gjengstø Holding AS | Real estate | 2020 |
| H Strand Invest AS | | 2025 |
| H&N Holding AS | Transport & logistics | 2021 |
| H-Invest AS | Real estate | 2022 |
| H. Alfsen Invest AS | Financial services | 2005 |