| Frid Eiendom AS | Real estate | 2010 |
| Frids Hage AS | Real estate | 2022 |
| Friheten Invest AS | Real estate | 2007 |
| Fritt Vilt AS | Administrative & support | 2010 |
| FRK. Getz AS | Other services | 2024 |
| Froen Bruk Da | Real estate | 2001 |
| Frogn Elektro AS | Manufacturing | 2011 |
| Frogn Express AS | Transport & logistics | 2016 |
| Frogn Marina AS | Real estate | 2010 |
| Frogn Næringsutvikling AS | Real estate | 1989 |
| Frogn Pedagogiske Senter AS | Education | 2013 |
| Frogn Private Vannverk SA | Water & waste | 1921 |
| Front Holding AS | | 2006 |
| Fru Brattens Blomstergleder AS | Wholesale & retail | 2020 |
| Fure & Co AS | Professional & scientific | 2021 |
| Fus! AS | Information & communication | 2014 |
| Fush Holding AS | | 2021 |
| Future Engineering AS | Professional & scientific | 2006 |
| Fyfazan Invest AS | Professional & scientific | 2025 |
| Fyk Invest AS | Real estate | 2017 |
| Fyrveien Vann- Og Avløpslag SA | Water & waste | 2018 |
| Få Det Utført AS | Construction | 2022 |
| Få Service AS | Education | 2020 |
| Førstemann AS | Education | 2023 |
| G.Berg AS | | 2017 |
| G.L Invest AS | Professional & scientific | 2022 |
| Gaiacore AS | Professional & scientific | 2025 |
| Galaxy Holding AS | Wholesale & retail | 2020 |
| Galleri Cafe Teskje AS | Hospitality | 1998 |
| Galleri Havstad AS | Wholesale & retail | 2002 |
| Galleri Havstad Da | Wholesale & retail | 1996 |
| Galleri Heavy Metall Da | Other services | 2005 |
| Gammellykkja Invest AS | | 2025 |
| Garasjedrift Sagaveien 13 SA | Transport & logistics | 2008 |
| Gass Og Pusteservice AS | Professional & scientific | 2006 |
| Gaveglad AS | Wholesale & retail | 2019 |
| Geir Hjorteset Holding AS | | 2020 |
| Geir Kaalstad Consulting AS | Wholesale & retail | 1996 |
| Genie V Capital AS | | 2021 |
| Geosol AS | Construction | 2022 |
| Gew Holding AS | Wholesale & retail | 2020 |
| Gitarer Ved Fjorden AS | Arts & recreation | 2018 |
| Gjersøe Holding AS | Wholesale & retail | 2015 |
| Gjølmyr Eiendom Da | Real estate | 2009 |
| Gleff Holding AS | Real estate | 2016 |
| Glennewedding AS | Administrative & support | 2013 |
| Globalcenter AS | Professional & scientific | 2021 |
| Go'E Bussa AS | Transport & logistics | 1999 |
| Godt Lokalt Øst AS | Wholesale & retail | 2010 |
| Goj Verktøy AS | Wholesale & retail | 1980 |
| Good Days Investments AS | | 2026 |
| Good Morning AS | Information & communication | 2023 |
| Gorseth Holding AS | Wholesale & retail | 2001 |
| Gotto Invest AS | | 2022 |
| Gourmentor AS | Real estate | 2004 |
| Gram Holding AS | Financial services | 2005 |
| Graving Og Betong AS | Construction | 2023 |
| Greencon AS | Professional & scientific | 2015 |
| Greenway-Norge AS | Wholesale & retail | 2019 |
| Gro Kolstad Invest AS | | 2026 |
| Growthitude AS | Professional & scientific | 2015 |
| Gry AS | Real estate | 2005 |
| Grøn-Hansen Holding AS | Real estate | 1984 |
| Grøna Og Svindal Skog Ans | Agriculture & fishing | 2004 |
| Grøterud Prosjekt AS | Professional & scientific | 1997 |
| Grøttjord-Glenne Holding AS | | 2026 |
| GSL AS | Wholesale & retail | 2013 |
| GSL7 Holding AS | | 2020 |
| Guideme AS | Administrative & support | 2026 |
| Gula Invest AS | Professional & scientific | 2023 |
| Gulliksbakken AS | Real estate | 2014 |
| Gullsmed Atelieret Da | Manufacturing | 2011 |
| Gulv-Direkte AS | Wholesale & retail | 2018 |
| Gunnar Magnus Consulting AS | Professional & scientific | 2023 |
| Gunnars Kurs AS | Education | 2012 |
| Gustino AS | Other services | 2010 |
| Gva Drift SA | Water & waste | 2017 |
| Gylte Eiendom AS | Real estate | 2026 |
| Gylteholmen Brygger AS | Real estate | 2011 |
| H Heitmann & Son AS | Real estate | 1964 |
| Ha.N. AS | Hospitality | 2020 |
| Haavardsholm Holding AS | Financial services | 2012 |
| Haavardsholm Invest AS | Financial services | 2011 |
| Hagen Gårdene AS | Real estate | 2002 |
| Hagen JR. Invest AS | Real estate | 2017 |
| Hagmans Nordic AB Nuf | Wholesale & retail | 2005 |
| Haha Holding AS | | 2022 |
| Haip AS | Information & communication | 2025 |
| Hakato Holding AS | Financial services | 2016 |
| Haks Holding AS | | 2023 |
| Halsåsen 12 AS | Real estate | 2021 |
| Hamborg AS | Wholesale & retail | 2018 |
| Hamborg Holding AS | Wholesale & retail | 2005 |
| Hame Holding AS | Financial services | 2018 |
| Handelshuset Anker AS | Hospitality | 2012 |
| Handyman Palmer AS | Construction | 2011 |
| Haneborg Gård AS | Wholesale & retail | 2022 |
| Haneborg Holding AS | | 2018 |
| Haneborgenga AS | Real estate | 2016 |
| Hans Og Grete Tannklinikk AS | Health & social care | 2005 |