| Gpbm Nordic AS | Wholesale & retail | 1990 |
| GPF AS | | 2024 |
| GPP Bygg & Bolig AS | Real estate | 2005 |
| GPP Byggentreprenør AS | Construction | 2016 |
| GPS Food Group AS | Wholesale & retail | 2013 |
| Gpu & Code AS | Information & communication | 2024 |
| GR Construction Norway AS | Construction | 2025 |
| GR Development AS | Real estate | 2025 |
| GR Investment AS | | 2025 |
| Gr&Ei AS | Professional & scientific | 2017 |
| Gr.Løkka Eiendom AS | Real estate | 2017 |
| Gr:Ow Management AS | Arts & recreation | 2016 |
| Gr:Ow Publishing AS | Information & communication | 2015 |
| Gr:Ow Records AS | Arts & recreation | 2015 |
| Graakammen Consulting AS | Information & communication | 2001 |
| Graanul Norway AS | Professional & scientific | 2025 |
| Grab & Go Da | Hospitality | 2009 |
| Grab the Challenge AS | | 2014 |
| Grabpa AS | Professional & scientific | 2000 |
| Grabs AS | Professional & scientific | 2025 |
| Grabs Drift AS | Wholesale & retail | 2025 |
| Gracan AS | Construction | 2005 |
| Gracchus AS | Professional & scientific | 2016 |
| Grace and Butterflies AS | Education | 2022 |
| Grace AS | Hospitality | 1984 |
| Grace Impact AS | Wholesale & retail | 2021 |
| Graci AS | | 2023 |
| Grad 5 AS | Real estate | 2020 |
| Grade Group AS | Professional & scientific | 2013 |
| Grade Roofers & Flooring AS | Construction | 2019 |
| Gradescreener AS | Information & communication | 2024 |
| Gradient Capital AS | | 2026 |
| Gradient Drilling Solutions AS | Information & communication | 2019 |
| Gradjevinar D.O.O. | Construction | 2012 |
| Graesli Konsult AS | | 2023 |
| Graf AS | Professional & scientific | 1997 |
| Grafdirekt AS | Wholesale & retail | 2004 |
| Graff & Graff AS | Financial services | 2020 |
| Graff AS | Administrative & support | 2021 |
| Graff Executive Search AS | Administrative & support | 2013 |
| Graff Invest AS | Real estate | 2013 |
| Graff Media AS | Information & communication | 2017 |
| Graffa AS | | 1986 |
| Graffer Kraft AS | Energy | 2018 |
| Graffiti Rengjøring AS | Administrative & support | 1995 |
| Grafi Trade AS | Professional & scientific | 1985 |
| Grafikk Oslo AS | Wholesale & retail | 2024 |
| Grafikksenteret AS | Arts & recreation | 2017 |
| Grafikon AS | Professional & scientific | 1996 |
| Grafisk & Plast AS | Manufacturing | 1975 |
| Grafisk Eiendom AS | Real estate | 2011 |
| Grafisk Form AS | Professional & scientific | 2015 |
| Grafisk Mailing Distribusjon AS | Manufacturing | 2015 |
| Grafisk Papir AS | Wholesale & retail | 1992 |
| Grafisk Spiralisering AS | Manufacturing | 1994 |
| Grafisk Stentrykk AS | Manufacturing | 1990 |
| Graft Holding AS | Health & social care | 2019 |
| Grafton Management AS | Administrative & support | 2006 |
| Grafton Norge AS | Administrative & support | 1985 |
| Graham AS | | 2020 |
| Grains Frogner AS | Hospitality | 2019 |
| Grains Frysja AS | Manufacturing | 2021 |
| Grains Holding AS | Manufacturing | 2021 |
| Grains Løren AS | Manufacturing | 2021 |
| Grains Majorstuen AS | Manufacturing | 2018 |
| Grains Mathallen AS | Wholesale & retail | 2020 |
| Grains Production AS | Manufacturing | 2021 |
| Graja Invest AS | Real estate | 2006 |
| Gram Art AS | Wholesale & retail | 2008 |
| Gram International Inc | Wholesale & retail | 2005 |
| Gram Shipping AS | Professional & scientific | 1981 |
| Gram Svendsen AS | Professional & scientific | 2013 |
| Gram Svendsen Invest AS | Real estate | 2017 |
| Gramer Invest AS | | 2021 |
| Gramercy Capital AS | Financial services | 2015 |
| Gramercy Partners AS | | 2022 |
| Grammatistes AS | Information & communication | 2021 |
| Grammeltvedt Advokatfirma AS | Professional & scientific | 2019 |
| Gramont AS | Information & communication | 2024 |
| Grams AS | Professional & scientific | 2012 |
| Gramst AS | Information & communication | 2003 |
| Gramveien 50 AS | Real estate | 2016 |
| Gran Boligbygg AS | Real estate | 2007 |
| Gran Canaria Football Center | Information & communication | 2007 |
| Gran Eiendomsutvikling AS | Real estate | 2004 |
| Gran Handelspark AS | Real estate | 2007 |
| Gran Jansen AS | Arts & recreation | 2021 |
| Gran Nielsen AS | Wholesale & retail | 2025 |
| Gran Villa Rosa Properties AS | Real estate | 2016 |
| Gran-Jansen AS | Manufacturing | 2005 |
| Granavolden Eiendom AS | Real estate | 2010 |
| Granbakken Dyreklinikk Og Hundepensjonat AS | Agriculture & fishing | 2021 |
| Granco AS | Real estate | 1985 |
| Grand Cafè Oslo AS | Hospitality | 2002 |
| Grand Cru AS | Hospitality | 2017 |
| Grand Gruppen AS | Wholesale & retail | 2020 |
| Grand Hotel AS | Real estate | 1897 |
| Grand Pizza AS | Hospitality | 2014 |
| Grand Sport Holding AS | Information & communication | 2005 |
| Grand Sport Records AS | Information & communication | 2005 |