| Grindalsmoen Bygg AS | Real estate | 2003 |
| Grindalsmoen Eiendom AS | Real estate | 2021 |
| Grindalsvegen 7 Eiendom AS | Real estate | 2017 |
| Grindbakken Holding AS | | 2020 |
| Grindbakken Selskaper AS | | 2025 |
| Grinde AS Sivilarkitekter Mnal | Professional & scientific | 1987 |
| Grinde Neptune AS | Professional & scientific | 2005 |
| Grindeks Kalceks Norge AS | Wholesale & retail | 2023 |
| Grindland Holding AS | Financial services | 2005 |
| Gringott AS | Professional & scientific | 2018 |
| Grini in a Bottle AS | | 2023 |
| Grini Invest AS | | 2021 |
| Grini Mølle 1-4 Etg Ans | Real estate | 2001 |
| Grini Næringspark 4B AS | Real estate | 1999 |
| Grini Næringspark AS | Real estate | 2017 |
| Grini Nærinspark 4 Da | Real estate | 2004 |
| Grini.Com AS | | 2018 |
| Grinidammen 10 AS | Real estate | 2019 |
| Grinifossen AS | Real estate | 2005 |
| Griniveien 10 AS | Real estate | 2005 |
| Grip Gym AS | Education | 2020 |
| Gripesi AS | Real estate | 2013 |
| Gripom AS | Real estate | 2018 |
| Griselekkert Da | Arts & recreation | 1996 |
| Grit Assist AS | Information & communication | 2024 |
| Grit Oslo AS | Other services | 2025 |
| Grit.X AS | Education | 2014 |
| Gritera Advisory AS | Information & communication | 2020 |
| Gritera Analytics AS | Professional & scientific | 2022 |
| Gritera Code AS | Information & communication | 2023 |
| Gritera Group AS | Information & communication | 2021 |
| Gritera International AS | Information & communication | 2024 |
| Gritera Quality AS | Information & communication | 2022 |
| Gritera Security AS | Information & communication | 2023 |
| Gritera Venture AS | Professional & scientific | 2023 |
| Grizzly AS | Education | 2023 |
| GRJ AS | Real estate | 2009 |
| Gro & Daan AS | | 2010 |
| Gro Bidco AS | Information & communication | 2020 |
| Gro Capital International AS | | 2024 |
| Gro Finco AS | Information & communication | 2020 |
| Gro Hydroponics AS | Agriculture & fishing | 2017 |
| Gro Investment AS | Real estate | 2006 |
| Gro Midco AS | Information & communication | 2020 |
| Gro Mjellem AS | Financial services | 2005 |
| Gro Moldstad AS | Wholesale & retail | 2026 |
| Gro Og Jøran Olsson Da | Arts & recreation | 1996 |
| Gro Topco AS | Information & communication | 2020 |
| Gro Vikar AS | Administrative & support | 2022 |
| Groba AS | Professional & scientific | 1999 |
| Grod Holding AS | | 2026 |
| Grofondet AS | Real estate | 2006 |
| Grohe AS Norsk Avdeling Av Utenlandsk Foretak Nuf | Wholesale & retail | 1999 |
| Grokker AS | | 2026 |
| Groltex AS | Information & communication | 2020 |
| Groma AS | Professional & scientific | 2014 |
| Gromgull AS | Financial services | 2016 |
| Gromis AS | Information & communication | 2026 |
| Gromørk AS | Health & social care | 2017 |
| Gronli Invest AS | | 2025 |
| Groomed Gents AS | Other services | 2026 |
| Groovi AS | Wholesale & retail | 2026 |
| Groovi Holding AS | | 2026 |
| Groovy AS | Arts & recreation | 1996 |
| Grorud Elektro Service AS | Construction | 2010 |
| Grorud Gjerde AS | Construction | 1967 |
| Grorud Granitt Og Skifer AS | Mining & quarrying | 2002 |
| Grorud Grill AS | Hospitality | 2019 |
| Grorud Holding AS | Real estate | 2017 |
| Grorud Håndtverk-Service AS | Construction | 1996 |
| Grorud Industrieiendommer AS | Real estate | 2016 |
| Grorud Legesenter Da | Health & social care | 2018 |
| Grorud Maler-Service AS | Construction | 2023 |
| Grorud Mat AS | Wholesale & retail | 2012 |
| Grorud Persienner AS | Wholesale & retail | 1998 |
| Grorud Pizza AS | Hospitality | 2018 |
| Grorud Rørlegger-Service AS | Construction | 2016 |
| Grorud Samfunnshus SA | Real estate | 1995 |
| Grorud Torg AS | Wholesale & retail | 2017 |
| Grorud Torg Frukt Og Grønt AS | Wholesale & retail | 2020 |
| Grorud Utbygging AS | Real estate | 2011 |
| Groruddalen Bilsenter AS | Wholesale & retail | 1989 |
| Groruddalen Containerutleie AS | Administrative & support | 2015 |
| Groruddalen Eiendomsinvest AS | Real estate | 2017 |
| Groruddalen Glassmesterveksted AS | Construction | 1968 |
| Groruddalen Jernbane AS | Construction | 2012 |
| Groruddalen Kristne Skole AS | Education | 2013 |
| Groruddalen Lastebilxpress Nuf | Transport & logistics | 2009 |
| Groruddalen Legekontor AS | Health & social care | 2016 |
| Groruddalen Marked Og Media AS | Manufacturing | 1987 |
| Groruddalen Renhold AS | Administrative & support | 2025 |
| Groruddalens Avis AS | Real estate | 2004 |
| Grorudhagen AS | Real estate | 2016 |
| Grorudveien 63 AS | Real estate | 2022 |
| Grorudveien 99 AS | Real estate | 2015 |
| Grosch Invest AS | | 2025 |
| Groseth Consulting AS | Professional & scientific | 2025 |
| Grossistgruppen AS | Wholesale & retail | 2024 |
| Grossmann & Gabrielsen Da | Administrative & support | 2005 |
| Grot AS | Real estate | 2005 |