| Frøken Bryn AS | Other services | 2021 |
| Frøken Pedersen AS | Other services | 2008 |
| Fuji Sushi Jessheim AS | Hospitality | 2012 |
| Fuku Holding AS | | 2025 |
| Fullflow International Limited | Professional & scientific | 2012 |
| Fundament Gruppen AS | Professional & scientific | 2005 |
| Furulund Eiendomsservice AS | Real estate | 2018 |
| Furulund Gruppen AS | Real estate | 2016 |
| Furulund Invest AS | Real estate | 2013 |
| Furulund Kran & Transport AS | Construction | 2016 |
| Furulundåsen AS | Construction | 2020 |
| Futt AS | Real estate | 2007 |
| Future KM Holding AS | | 2023 |
| Fyrtårnet Eiendom AS | Real estate | 2018 |
| G. Myrvold Holding AS | | 2025 |
| Gadeberg AS | Professional & scientific | 1998 |
| Galtneset Invest AS | | 2021 |
| Gamika AS | Construction | 2010 |
| Gamle Nabo Jessheim AS | Hospitality | 2024 |
| Gamma Grafisk AS | Professional & scientific | 2009 |
| Gammelli Invest AS | | 2019 |
| Garasjen Pubdrift Da | Hospitality | 2003 |
| Garder Eiendom AS | Real estate | 2014 |
| Garder Energiselskap AS | Energy | 2026 |
| Gardermoakademiet AS | Real estate | 2024 |
| Gardermoen Bruktbil AS | Wholesale & retail | 2024 |
| Gardermoen Elektro AS | Construction | 2007 |
| Gardermoen Elektro Eiendom AS | Real estate | 2019 |
| Gardermoen Energi AS | Real estate | 2022 |
| Gardermoen Entreprenør AS | Real estate | 2024 |
| Gardermoen Handel Og Service, Skare Og Mikkelborg Ans | Wholesale & retail | 2007 |
| Gardermoen Hjertesenter AS | Health & social care | 2017 |
| Gardermoen Medisinske Senter Legekontoret AS | Health & social care | 2024 |
| Gardermoen Næringspark II B Og C SA | Real estate | 2017 |
| Gardermoen Økonomi AS | Professional & scientific | 2017 |
| Gardermovegen 25 AS | Real estate | 2018 |
| Gartnerløkka Utvikling AS | Real estate | 2016 |
| Gastro B Sliman AS | Transport & logistics | 2021 |
| Gausta Residence AS | Real estate | 2017 |
| Geir Sørmoen Holding AS | Administrative & support | 2004 |
| Gelatobar AS | Manufacturing | 2021 |
| Genz Holding AS | Manufacturing | 2024 |
| Genz Kompostitt AS | Manufacturing | 2024 |
| Georock AS | Professional & scientific | 2014 |
| Gib Eiendom AS | Real estate | 2013 |
| Gilberg Eiendom AS | Real estate | 2014 |
| GKK1 AS | Real estate | 2017 |
| GL Security AS | Real estate | 2021 |
| Glabo AS | Real estate | 2006 |
| Gladgutta Profiltrykk AS | Wholesale & retail | 2024 |
| Glimtforum AS | Information & communication | 2021 |
| Glomma Park AS | Real estate | 2021 |
| Go Getter AS | Professional & scientific | 2026 |
| Go'Bento AS | Hospitality | 2015 |
| Gracie Barra Jessheim AS | Education | 2023 |
| Gransborg Invest AS | Information & communication | 2023 |
| Great Grape Norge AS | Wholesale & retail | 2012 |
| Grefsen Eiendom AS | Real estate | 2006 |
| Grefsen Holding AS | Construction | 1988 |
| Grefsen Vedlikehold AS | Construction | 1988 |
| Gresvig AS | Wholesale & retail | 2023 |
| Grønn Bud & Vare AS | Transport & logistics | 2024 |
| Grønn Vei Transport AS | Transport & logistics | 2023 |
| Grønnstruktur AS | Real estate | 2019 |
| Grønské AS | Information & communication | 2023 |
| GS11 Sikkerhet AS | Administrative & support | 2025 |
| GT Bygg AS | Construction | 2022 |
| GTV7 AS | Real estate | 2020 |
| Gull Holdings AS | Health & social care | 2017 |
| Gullsmed Liv Lerdahl A/S | Wholesale & retail | 1988 |
| Gullsmed Og Urmaker Øiesvold AS | Wholesale & retail | 2012 |
| Gullungen Familiebarnehage AS | Education | 2018 |
| Gulo Sport AS | Wholesale & retail | 2026 |
| Gustavsen & Slemdal AS | Manufacturing | 1993 |
| Guttahjelpen AS | Administrative & support | 2026 |
| GVN 9 AS | Real estate | 2017 |
| Gø Holding AS | Professional & scientific | 2017 |
| H-Estetikk AS | Other services | 2024 |
| H. Nestens Veg 25 AS | Real estate | 2018 |
| H.M.H Holding AS | | 2023 |
| H.Thanke Bygg AS | Construction | 2008 |
| H.W Bil AS | Wholesale & retail | 2025 |
| H4 Gruppen AS | Professional & scientific | 2018 |
| Hafjell Alpin Lodge AS | Real estate | 2021 |
| Hafjell Alpin Resort AS | Real estate | 2018 |
| Hafjell Utvikling AS | Real estate | 2023 |
| Haga Utvikling AS | Real estate | 2018 |
| Haleva Holding AS | | 2020 |
| Halias AS | Real estate | 1996 |
| Halsan Og Haugen AS | Wholesale & retail | 2005 |
| Halvorsen & Co Da | Wholesale & retail | 1997 |
| Hans Gaarders AS | Real estate | 2019 |
| Hans-Henrik Furulund Eiendom AS | Real estate | 2013 |
| Hansky Invest AS | Professional & scientific | 2005 |
| Harald Kværner Eiendom AS | Real estate | 1970 |
| Harald Kværner Eiendom Drift AS | Administrative & support | 1993 |
| Hardangerfrukt Jomfrugata Helsekost AS | Wholesale & retail | 1998 |
| Harris Transport AS | Transport & logistics | 2014 |
| Hartveit-Jacobsen Invest AS | | 2022 |
| Has Eiendom AS | Real estate | 2017 |