| Fast Entreprenør AS | Construction | 2012 |
| Faster Holding AS | Construction | 2024 |
| Fastlandsveien Eiendom AS | Real estate | 2024 |
| Feet Holding AS | Real estate | 2010 |
| Fehrstadt Holding AS | Financial services | 2015 |
| Ferner Eiendom AS | Real estate | 2022 |
| Ferner Event AS | Administrative & support | 2026 |
| FH Rør AS | | 2025 |
| Fimbulljod Productions AS | Arts & recreation | 2017 |
| Fitbar AS | Wholesale & retail | 2024 |
| Fjeldskilen Eiendom AS | Real estate | 1998 |
| Fjeldstad Bygg AS | Wholesale & retail | 1968 |
| Fjelle Og Dahle AS | Construction | 2009 |
| Fjord Catering AS | Hospitality | 2023 |
| Fme Eiendom AS | Real estate | 2025 |
| FMS Autoparts AS | Wholesale & retail | 1997 |
| FNB 1 AS | Real estate | 2022 |
| FNB Tak AS | Construction | 2023 |
| Fog Holding AS | Wholesale & retail | 1998 |
| Forge AS | Professional & scientific | 2026 |
| Forsberg Holding AS | Real estate | 2005 |
| Forsetlund Nordre Gård Da | Agriculture & fishing | 2004 |
| Forsommer AS | Professional & scientific | 1994 |
| FP Holding AS | | 2025 |
| Fredrikstad Bil AS | Wholesale & retail | 2000 |
| Fredrikstad Eiendom AS | Real estate | 1997 |
| Fredrikstad Eiendomsutvikling AS | Real estate | 2007 |
| Fredrikstad Hageservice AS | Administrative & support | 2020 |
| Fredrikstad Hybelutleie AS | Real estate | 1996 |
| Fredrikstad Live AS | Arts & recreation | 2016 |
| Fredrikstad Marine Elektronikk AS | Construction | 2024 |
| Fredrikstad Metallindustri AS | Manufacturing | 1995 |
| Fredrikstad Motorsenter AS | Other services | 1987 |
| Fredrikstad Næringsbygg AS | Construction | 2012 |
| Fredrikstad Takseringsforretning AS | Professional & scientific | 1994 |
| Fredrikstad Ventilasjons- Og Blikkenslagerforretning AS | Construction | 1967 |
| Fredrikstad Veterinærpraksis AS | Professional & scientific | 2018 |
| Fres Invest AS | | 2018 |
| Fritidssenteret Øst AS | Construction | 2021 |
| FSC Invest AS | Real estate | 2019 |
| FSM Holding AS | | 2023 |
| Fva AS | Water & waste | 2012 |
| Først Til Stede AS | Arts & recreation | 2025 |
| G. Dahle Holding AS | Construction | 2013 |
| Gamedesign AS | Information & communication | 2023 |
| Gappay Norge Lindahl | Other services | 2013 |
| Gare Holding AS | | 2019 |
| Gjøen AS | Construction | 2023 |
| Gjøen Solutions AS | Construction | 2023 |
| Gjølberg AS | Transport & logistics | 2022 |
| Glassfiber Service Båt Og Bil AS | Manufacturing | 2021 |
| Gleipnir AS | | 2022 |
| Godtfeld Kapital AS | | 2026 |
| Gofi AS | Education | 2007 |
| Golfreisespesialisten.No AS | Administrative & support | 2024 |
| Gorglar AS | Information & communication | 2011 |
| Granbu AS | Real estate | 2005 |
| Graving Og Vedlikehold AS | Construction | 2022 |
| Gressenka AS | Financial services | 2005 |
| Gressvik Barneklær Ans | | 1991 |
| Gressvik Bilservice AS | Other services | 2018 |
| Gressvik Blomster AS | Wholesale & retail | 2013 |
| Gressvik Bygg&Eiendom AS | Construction | 2024 |
| Gressvik Elektriske AS | Construction | 2015 |
| Gressvik Frisør Og Velvære AS | Other services | 2017 |
| Gressvik Gullsmed & Interiør AS | Wholesale & retail | 2025 |
| Gressvik Hud Og Fotklinikk AS | Other services | 2020 |
| Gressvik Lagerseksjon AS | Real estate | 2023 |
| Gressvik Leger AS | Health & social care | 2020 |
| Gressvik Leger Eiendom AS | Real estate | 2020 |
| Gressvik Marina AS | Real estate | 1972 |
| Gressvik Mekaniske Verksted AS | Manufacturing | 2019 |
| Gressvik Pizza & Grill AS | Wholesale & retail | 2025 |
| Gressvik Summerparty AS | Arts & recreation | 2022 |
| Gressvik Torg 44 AS | Real estate | 2018 |
| Gressvik Torg Holding AS | Real estate | 2018 |
| Gressvikklinikken AS | Real estate | 2023 |
| Greåkergruppen AS | Real estate | 2018 |
| Gridbox AS | Wholesale & retail | 2022 |
| Grønlund Consulting AS | Professional & scientific | 2018 |
| GT Holding AS | Real estate | 2020 |
| GTS Maskinering & Verktøyindustri Da | Manufacturing | 1988 |
| Gulldrue AS | Wholesale & retail | 2025 |
| Gulvstøp AS | Construction | 2025 |
| Gunnelandet 9 AS | Real estate | 2014 |
| Gvelven Feriegrend AS | Real estate | 2018 |
| Gylve AS | Professional & scientific | 2016 |
| H-Laas AS | Administrative & support | 2025 |
| H. J. Nilsensgate Utvikling AS | Construction | 2008 |
| H. Ålerød AS | | 2026 |
| Hae Skolt AS | | 2020 |
| Hal I Og Dra Holding AS | | 2025 |
| Halvorsen Strategies AS | Professional & scientific | 2026 |
| Handelsbygg 18 AS | Real estate | 2023 |
| Handelsbygg Brekstad AS | Real estate | 2013 |
| Handelsbygg Høyanger AS | Real estate | 2023 |
| Handelsbygg Kaupanger 2 AS | Real estate | 2018 |
| Handelsbygg Kongsberg AS | Real estate | 2010 |
| Handelsbygg Namsos AS | Real estate | 2022 |
| Handelsbygg Selbu 2 AS | Real estate | 2021 |