| Garfors Global AS | Real estate | 2022 |
| Gargamel AS | | 2018 |
| Gargoil AS | Information & communication | 2006 |
| Gargoluobbal Invest AS | | 2005 |
| Gargus AS | | 2019 |
| Garko AS | Wholesale & retail | 2025 |
| Garm Heia AS | Real estate | 2022 |
| Garm IT AS | Information & communication | 2021 |
| Garm Utvikling AS | Real estate | 2012 |
| Garman Advokatfirma AS | Professional & scientific | 1998 |
| Garmann Butikkdrift AS | Wholesale & retail | 2026 |
| Garmannvik Consulting AS | Professional & scientific | 2020 |
| Garmar AS | | 2018 |
| Garmar Holding AS | Real estate | 2005 |
| Garmat AS | Hospitality | 2025 |
| Garment Bag AS | Professional & scientific | 2026 |
| Garment Sourcing AS | Wholesale & retail | 2024 |
| Garmr AS | Professional & scientific | 2012 |
| Garner Eiendom AS | Real estate | 2006 |
| Garnes Data AS | Information & communication | 2000 |
| Garnes Eiendom AS | Real estate | 2023 |
| Garnes Gruppen AS | Information & communication | 2014 |
| Garnes Holding AS | | 2024 |
| Garnesvatnet AS | | 2025 |
| Garnhagen AS | Professional & scientific | 2026 |
| Garnholmen Va SA | Water & waste | 2018 |
| Garnish AS | Wholesale & retail | 2020 |
| Garnodden AS | Real estate | 2006 |
| Garnoggreier AS | Wholesale & retail | 2026 |
| Garnpikene Manglerud AS | Wholesale & retail | 2022 |
| Garntopia AS | Wholesale & retail | 2018 |
| Garonda AS | Real estate | 2021 |
| Garseg AS | Financial services | 2021 |
| Garstecki Holding AS | | 2008 |
| Garthus AS | Wholesale & retail | 2017 |
| Garthus Holding AS | Wholesale & retail | 2016 |
| Gartnar Helleland AS | Administrative & support | 2018 |
| Gartner Belgium Bvba | Information & communication | 2016 |
| Gartner Finland OY | Information & communication | 2015 |
| Gartner Italia S.R.L. | Information & communication | 2016 |
| Gartner Norge AS | Information & communication | 1989 |
| Gartnerboligen AS | Real estate | 2017 |
| Gartnerfuglen Arkitekter AS | Professional & scientific | 2013 |
| Gartnerhagen AS | Administrative & support | 1979 |
| Gartnerhallen SA | Agriculture & fishing | 1930 |
| Gartnerløkken Eiendom AS | Real estate | 2016 |
| Gartnersletta II AS | Real estate | 2023 |
| Gartnersletta II Holding AS | Real estate | 2024 |
| Garuda Montasje Og Netthandel Nuf | Construction | 2010 |
| Garuda Oslo AS | Administrative & support | 2009 |
| Garv Gains AS | Information & communication | 2024 |
| Garver Ytteborgs Vei AS | Real estate | 2007 |
| Garver Ytterborgs Vei 83 AS | Real estate | 2004 |
| Garver Ytterborgsvei 96 AS | Real estate | 2012 |
| Garås Hestesenter AS | Arts & recreation | 2019 |
| Gasellefarmen AS | Professional & scientific | 2016 |
| Gasellen Invest AS | | 2025 |
| Gash Frisør AS | Other services | 2012 |
| Gaska Tech Consulting AS | Information & communication | 2022 |
| Gasmann Eiendom AS | Real estate | 2020 |
| Gasmann Holding AS | Real estate | 2019 |
| Gasmann Invest AS | Real estate | 2020 |
| Gasmar AS | Administrative & support | 2014 |
| Gasolin Linderud AS | Real estate | 2010 |
| Gasolin Oslo AS | Real estate | 2010 |
| Gasolin Sandefjord AS | Real estate | 2017 |
| Gasolin Slemmestad AS | Real estate | 2010 |
| Gasolin Sværsvann AS | Real estate | 2010 |
| Gasolina AS | Arts & recreation | 2019 |
| Gaspro Ans | | 1997 |
| Gasproducts Norway AS | Wholesale & retail | 2013 |
| Gass Partner Norge AS | Wholesale & retail | 2010 |
| Gassecure AS | Professional & scientific | 2008 |
| Gassendi Kredithantering KB | Administrative & support | 2006 |
| Gassleverandøren AS | Wholesale & retail | 2009 |
| Gast Entreprenør AS | Construction | 2004 |
| Gaston AS | | 2023 |
| Gastone Bulk AS | Transport & logistics | 2025 |
| Gastro AS | Real estate | 1987 |
| Gastro Eiendom AS | Real estate | 2020 |
| Gastro Norge AS | Wholesale & retail | 2000 |
| Gastro Studio AS | Hospitality | 2026 |
| Gastrokirurgen AS | Health & social care | 2015 |
| Gastronomi Norge AS | Professional & scientific | 2018 |
| Gat Invest AS | Financial services | 2012 |
| Gate Design AS | Professional & scientific | 1999 |
| GATE2SERVICES AS | Information & communication | 2025 |
| GATE8 AS | Professional & scientific | 2024 |
| Gatecon AS | Professional & scientific | 2026 |
| Gatedrift AS | Manufacturing | 2016 |
| Gatekapital AS | Arts & recreation | 2021 |
| Gatekeeper AS | | 2019 |
| Gathe + Gram AS | Professional & scientific | 2020 |
| Gather AS | Information & communication | 2026 |
| Gatla AS | Hospitality | 2015 |
| Gatliff Management AS | | 2019 |
| Gatti Services Ltd Nuf | Information & communication | 2025 |
| Gatty Holding AS | Health & social care | 2016 |
| Gauderbakken AS | Financial services | 2005 |
| Gauksås Invest AS | Construction | 2019 |