| Fullstakk Marketing AS | Professional & scientific | 2016 |
| Fullswing AS | Real estate | 2024 |
| Fullwave Geophysical AS | Professional & scientific | 2015 |
| Fultron AS | Professional & scientific | 2015 |
| Fulvous AS | Information & communication | 2022 |
| Fun by Fam AS | Professional & scientific | 2012 |
| Fun Stories AS | Other services | 2025 |
| Funaki Holding AS | | 2020 |
| Funch AS | Information & communication | 2024 |
| Funcom Oslo AS | Information & communication | 1993 |
| Funcom SE | Information & communication | 2011 |
| Fundament Organisasjonspsykologi AS | Professional & scientific | 2022 |
| Fundamental AS | Professional & scientific | 2000 |
| Fundare AS | | 2025 |
| Fundas AS | Professional & scientific | 2022 |
| Fundile Invest AS | | 2019 |
| Fundingpartner AS | Financial services | 2016 |
| Fundingpartner Group AS | Financial services | 2021 |
| Fundingpartner Securities AS | Financial services | 2021 |
| Fundra AI AS | Professional & scientific | 2024 |
| Funds & Friends AS | | 2024 |
| Funds Da | | 2010 |
| Fundy AS | Wholesale & retail | 2020 |
| Funera AS | Other services | 2017 |
| Fung Convenience AS | Wholesale & retail | 2020 |
| Fungiflora AS | Information & communication | 1976 |
| Funis AS | Information & communication | 2023 |
| Funkel Film AS | Information & communication | 2023 |
| Funkelia KS12 AS | Real estate | 2025 |
| Funkis AS | Real estate | 2005 |
| Funksjonell Eiendom AS | Real estate | 2000 |
| Funksjonell VVS AS | Construction | 1987 |
| Funksjonskjøkken AS | Wholesale & retail | 2016 |
| Funksjonsutstyr AS | Construction | 1990 |
| Funkweb - Suksess for Alle AS | Health & social care | 2021 |
| Funkweb Kompetanse AS | Information & communication | 2001 |
| Funky AS | | 2025 |
| Funky Kioskdrift AS | Hospitality | 2013 |
| Funkybiz AS | Professional & scientific | 2000 |
| Funnel Holding AS | Professional & scientific | 1986 |
| Funny Bone Holding AS | Information & communication | 2017 |
| Funtus AS | Financial services | 2010 |
| Fuori AS | Real estate | 2020 |
| Furbo AS | Real estate | 2021 |
| Furcifer AS | Real estate | 2018 |
| Furcula Vekst AS | | 2022 |
| Fure Holding AS | Financial services | 2005 |
| Fure Studio Oslo AS | Professional & scientific | 2025 |
| Furene Eiendom AS | Real estate | 2012 |
| Furesund AS | | 2020 |
| Furi AS | Real estate | 2023 |
| Furian Holding AS | | 2025 |
| Furnesvegen 111 AS | Real estate | 2017 |
| Furniture Production International AS | Wholesale & retail | 1998 |
| Furore Arkitektur AS | Professional & scientific | 2024 |
| Furore AS | | 2014 |
| Furore Social AS | Professional & scientific | 2021 |
| Furset Catering AS | Hospitality | 2017 |
| Furset Kantine AS | Hospitality | 2018 |
| Furset Media AS | Professional & scientific | 2022 |
| Fursetgruppen AS | Hospitality | 2011 |
| Furtune AS | Professional & scientific | 2017 |
| Furu Eiendommer AS | Real estate | 2023 |
| Furu Holding AS | Real estate | 2021 |
| Furu Spesialisten AS | Wholesale & retail | 1994 |
| Furuberget Plateselskap Da | Information & communication | 2013 |
| Furubråten AS | Construction | 2005 |
| Furubyte AS | Information & communication | 2012 |
| Furuhaug Consulting AS | Professional & scientific | 2022 |
| Furuhaug Da | Real estate | 1997 |
| Furuhaugen Utvikling AS | Real estate | 2020 |
| Furuholmen Eiendom AS | Real estate | 2018 |
| Furuholmen Eiendomsdrift AS | Real estate | 2006 |
| Furuholmen Friluft AS | Education | 2012 |
| Furuholmeninvest AS | Real estate | 1984 |
| Furuholt Holding AS | | 2021 |
| Furuhovde Invest AS | | 2021 |
| Furukongle Blockchain Consulting AS | Information & communication | 2022 |
| Furulund AS | Real estate | 1990 |
| Furumovegen 2 AS | Real estate | 2021 |
| Fururama Holding AS | | 2024 |
| Furuset Bergvarme AS | Energy | 2023 |
| Furuset Drift AS | Real estate | 2017 |
| Furuset Fryseterminal AS | Real estate | 2019 |
| Furuset Fysioterapi AS | Health & social care | 2019 |
| Furuset Legesenter Da | Health & social care | 2001 |
| Furuset Senter Invest AS | Real estate | 2017 |
| Furuset Skorep. Og Nøkkelservice AS | Other services | 2019 |
| Furuset Torg AS | Wholesale & retail | 2026 |
| Furuset Transport AS. | Transport & logistics | 2020 |
| Furuset Vest AS | Real estate | 2025 |
| Furusetbyen AS | Real estate | 2020 |
| Furuseth Assets AS | Financial services | 2014 |
| Furuseth Biokonsult AS | Professional & scientific | 2023 |
| Furuseth Forvaltning AS | | 2026 |
| Furuseth Pharma Invest AS | | 2017 |
| Furustien AS | | 2025 |
| Furutangen AS | Professional & scientific | 2001 |
| Furutoppen 2-4 AS | Real estate | 2020 |
| Furuvegen 6 AS | Real estate | 2019 |