| Groth Ellingsen II AS | | 2015 |
| Groth Høiby Holding AS | Wholesale & retail | 2020 |
| Grotheim Holding AS | Real estate | 2005 |
| Grotnes Limited Nuf | Professional & scientific | 2008 |
| Grotto AS | Hospitality | 2023 |
| Grouff Invest AS | | 2024 |
| Ground Control AS | Information & communication | 2015 |
| Grounded Works AS | | 2025 |
| Groundhog Advisors AS | Financial services | 2005 |
| Grounding Essentials AS | Wholesale & retail | 2025 |
| Groundshift AS | Professional & scientific | 2026 |
| Group Afl AS | | 2019 |
| Group PS Limited | Real estate | 2022 |
| Grouptalk Nuf | Administrative & support | 2016 |
| Grouse Holding AS | | 2023 |
| Grouse-Invest AS | | 2022 |
| Grove-Knutsen & Co AS | Wholesale & retail | 2003 |
| Grove-Knutsen Holding AS | | 2005 |
| Grovlia Kraftverk AS | Energy | 2023 |
| Growbaby AS | Wholesale & retail | 2026 |
| Growcraft AS | Information & communication | 2017 |
| Growers Group AS | Professional & scientific | 2021 |
| Growth to Great AS | Professional & scientific | 2014 |
| Growth Ventures AS | | 2021 |
| Growthfactory AS | Professional & scientific | 2022 |
| Grs.Offshore Renewables GmbH Nuf | Transport & logistics | 2025 |
| Grua Utvikling AS | Real estate | 2021 |
| Grubbegata 14 AS | Real estate | 2023 |
| Grubbestad Eiendom AS | Real estate | 2010 |
| Gruber-Hofer Metalltechnik GmbH Nuf | Construction | 2025 |
| Gruble Technology AS | Information & communication | 2024 |
| GRUBLE16 AS | | 2024 |
| Grue Consulting AS | Education | 2025 |
| Gruegata 18 Hjemmel AS | Real estate | 2017 |
| Gruegata 18 Tomteselskap AS | Real estate | 2009 |
| Gruetorget AS | Real estate | 2000 |
| Gruk AS | Arts & recreation | 2012 |
| Grumello AS | | 2024 |
| Grund AS | Construction | 2024 |
| Grund IT Consulting AS | Information & communication | 2025 |
| Grunderbox AS | Information & communication | 2020 |
| Grunderene Stonebridge Da | Information & communication | 1997 |
| Grunderformelen AS | Professional & scientific | 2023 |
| Grundfeldt Møbelsnekker AS | Construction | 2015 |
| Grundfond AS | Real estate | 1998 |
| Grundfos Norge AS | Wholesale & retail | 1990 |
| Grundingen 2 Invest AS | Real estate | 2012 |
| Grundingen Invest AS | Real estate | 2015 |
| Grundr AS | Professional & scientific | 2015 |
| Gruner Armering Ans | Construction | 1997 |
| Gruner Betong Ans | Construction | 1997 |
| Grunerhagen No Da | Professional & scientific | 2006 |
| Grunerløkka Dagligvare Ans | Wholesale & retail | 1998 |
| Grunerløkka Reisebyrå Ans | Administrative & support | 1995 |
| Grunerløkka Sushi AS | Hospitality | 2026 |
| Grung AS | Professional & scientific | 2024 |
| Grunkegryta AS | | 2021 |
| Grunn AS | Real estate | 2025 |
| Grunn Eiendom AS | Real estate | 2018 |
| Grunn Holding AS | Real estate | 2016 |
| Grunn- Og Høybygg AS | Real estate | 1955 |
| Grunnavågen Eiendom Invest AS | Real estate | 2002 |
| Grunnevika Eiendom AS | Real estate | 2010 |
| Grunnmur AS | Construction | 2006 |
| Grunnsikring AS | Wholesale & retail | 1998 |
| Grunnstein AS | Real estate | 2007 |
| Grunnsyn AS | Professional & scientific | 2019 |
| Grunt AS | Information & communication | 2015 |
| Gruntwork AS | Information & communication | 2023 |
| Grupa TNT AS | Information & communication | 2025 |
| Grupo Emir Limited | Real estate | 2022 |
| Grupo Nomadas Internacional Limited | Transport & logistics | 2025 |
| Grupo Sator Limited | Wholesale & retail | 2019 |
| Grusbanen AS | Hospitality | 2025 |
| Grusbutikken AS | Wholesale & retail | 2018 |
| Gruse Invest AS | Professional & scientific | 2024 |
| Grusveien Entertainment AS | Arts & recreation | 2022 |
| Gruvar Og Dragar AS | Information & communication | 2025 |
| Gruve AS | Financial services | 2024 |
| Gruven Digital AS | Information & communication | 2020 |
| GRV 37 AS | Real estate | 2018 |
| GRW Group AS | Wholesale & retail | 2024 |
| Gry M. & Her Family Affairs AS | | 2011 |
| Gry Warsla AS | Health & social care | 2020 |
| Gryd AS | Information & communication | 2025 |
| Gryende Selv AS | Health & social care | 2025 |
| Grynner Storkiosk Ans | Wholesale & retail | 1991 |
| Grynt Holding AS | Financial services | 2013 |
| Grypipen Holding AS | | 2005 |
| Grys Holding AS | Financial services | 2017 |
| Grytelokket Sentrum AS | Hospitality | 2011 |
| Grzegorz Herman, Building Construction & Transport Services | Construction | 2006 |
| Gråbein Bar AS | Hospitality | 2019 |
| Gråbein Foto Ans | Professional & scientific | 2006 |
| Gråbo AS | Professional & scientific | 2019 |
| Gråfjell AS | Real estate | 2006 |
| Gråfjell Holding AS | Professional & scientific | 2010 |
| Gråkammen Eiendom AS | | 2021 |
| Gråstein Invest AS | | 2021 |
| Grændsen AS | Real estate | 2020 |