| Fossbø AS | | 2018 |
| Framme AS | Professional & scientific | 2013 |
| Fredrik Nett Holding AS | | 2022 |
| Free to Give | Other services | 2013 |
| Frekhaug BT4 S1 AS | Real estate | 2024 |
| Frekhaug BT4 S2 AS | Real estate | 2024 |
| Frekhaug BT4 S3 AS | Real estate | 2024 |
| Frekhaug BT4 S4 AS | Real estate | 2024 |
| Frisør Design Holvika AS | Other services | 2024 |
| Frisørstudio AS | Other services | 2005 |
| Friva AS | Real estate | 1995 |
| Frivoldveien 52 AS | Real estate | 2017 |
| Frivoldveien 56 AS | Real estate | 2016 |
| Frivoldveien 60 AS | Real estate | 2016 |
| Frivoldveien 76 AS | | 2012 |
| Frivoll Eiendom AS | Real estate | 2026 |
| Frivoll Eplehagen AS | Professional & scientific | 2007 |
| Frivollveien 1 AS | Real estate | 1955 |
| Frode Marino Holding AS | | 2011 |
| From Bygg & Servicetjenester AS | Construction | 2024 |
| Frontier Venture AS | Information & communication | 2013 |
| Fru Juske AS | Real estate | 1996 |
| Fuhr Park 2 AS | Real estate | 2023 |
| Furumo Da | Real estate | 1998 |
| Future Horizon AS | Professional & scientific | 2021 |
| Future Materials AS | Professional & scientific | 2018 |
| Fønix Kapital AS | | 2022 |
| Førevann Drift AS | Professional & scientific | 2000 |
| Førevann Eiendom AS | Professional & scientific | 2015 |
| Førevann Fiskelag Ba | Agriculture & fishing | 1993 |
| Førevann Holding AS | Professional & scientific | 2015 |
| Førevann Kraft AS | Energy | 2023 |
| G.T Eiendom AS | Real estate | 2017 |
| G.T Eiendomsinvest AS | Real estate | 2020 |
| G.T Holding AS | Construction | 2017 |
| G.T Klima&Kuldeservice AS | Construction | 2017 |
| G.T Næringseiendom AS | Real estate | 2023 |
| G.T.G Tomteutvikling AS | Real estate | 2022 |
| G.T.H Anlegg AS | Agriculture & fishing | 2023 |
| G.T.H Eiendom AS | Real estate | 2025 |
| G.W. Holding AS | Real estate | 2005 |
| G3 Ungplanter AS | Professional & scientific | 1998 |
| Ga Moslått Holding AS | | 2024 |
| Ga-Eiendom AS | Real estate | 2006 |
| Gaardskjerringene I Eide AS | Agriculture & fishing | 2015 |
| Galleri Juskestredet AS | Real estate | 2013 |
| Galleri Storgaten AS | Hospitality | 2004 |
| Gamle Bievei AS | Real estate | 2026 |
| Garasjeporten AS | Wholesale & retail | 2022 |
| Garnuniverset AS | Wholesale & retail | 2018 |
| Gartnerimyra AS | Real estate | 2012 |
| Gartnerisk AS | Administrative & support | 2025 |
| Gassnor AS | Manufacturing | 2015 |
| Gaup 7 AS | | 2026 |
| Gaup 9 AS | | 2026 |
| Gaupemyrheia 2 AS | Real estate | 2022 |
| Gaupemyrheia AS | Real estate | 2021 |
| Gbei AS | Construction | 2026 |
| Gbnu Gundersholmen AS | Real estate | 2025 |
| Gbnu Jortveit AS | Real estate | 2025 |
| Gbnu Omre AS | Real estate | 2025 |
| GC Service AS | Wholesale & retail | 2018 |
| Geh Holding AS | Professional & scientific | 2019 |
| Geir Hovind Holding AS | Financial services | 2015 |
| Geithus Eiendom AS | Real estate | 2006 |
| Gestara AS | Information & communication | 2026 |
| Geti AS | Professional & scientific | 2024 |
| Gild Eiendom AS | Real estate | 2025 |
| Gilje Byggrådgivning AS | Professional & scientific | 2010 |
| GJ Production AS | Professional & scientific | 2017 |
| Gjennomskjæringen 4 AS | Real estate | 2020 |
| Gke AS | Education | 1993 |
| Glassworks AS | Information & communication | 2013 |
| Gma Eiendom AS | Real estate | 2021 |
| Godata AS | Information & communication | 2014 |
| Godt Pussa AS | Health & social care | 2016 |
| Golshani Literary Group AS | Arts & recreation | 2026 |
| Gorilla Invest AS | | 2024 |
| Gosk Invest AS | | 2021 |
| GR Eiendom Østerhus AS | Real estate | 2013 |
| Gran Invest AS | Health & social care | 1987 |
| Gravdahl Motor AS | Real estate | 1986 |
| Green Source Solutions AS | Professional & scientific | 2008 |
| Grimfest Kulturscene AS | Arts & recreation | 2014 |
| Grimfield AS | Wholesale & retail | 2018 |
| Grimstad Bensinstasjon AS | Wholesale & retail | 2007 |
| Grimstad Bil AS | Wholesale & retail | 1989 |
| Grimstad Bolig- Og Næringsutvikling AS | Real estate | 2013 |
| Grimstad Brusfabrikk AS | Manufacturing | 2018 |
| Grimstad Brøyteservice AS | Administrative & support | 2014 |
| Grimstad Burger AS | Hospitality | 2025 |
| Grimstad Bygg AS | Real estate | 1996 |
| Grimstad Bådsenter AS | Wholesale & retail | 2022 |
| Grimstad Catering Ans | Hospitality | 2002 |
| Grimstad DP AS | Professional & scientific | 2017 |
| Grimstad Eiendom AS | Real estate | 2007 |
| Grimstad Elektromarked AS | Wholesale & retail | 2004 |
| Grimstad Fotsone Ans | Health & social care | 1998 |
| Grimstad Fysikalske AS | Health & social care | 2024 |
| Grimstad Garasjene AS | Administrative & support | 1994 |