| Fitness Strømmen AS | Wholesale & retail | 2024 |
| Fitness Topco AS | Arts & recreation | 2022 |
| Fitness Univers AS | Wholesale & retail | 1991 |
| Fitness Vest AS | Wholesale & retail | 2022 |
| FITNESS24SEVEN AS | Arts & recreation | 2009 |
| Fitnessmafia AS | Education | 2016 |
| Fitnessroom Kværnerbyen AS | Arts & recreation | 2012 |
| Fitnessxpress AS | Arts & recreation | 2006 |
| Fitters AS | Construction | 2022 |
| Fitzpatrick Import Group Norge | Wholesale & retail | 1996 |
| Fitzroy Norge AS | | 2018 |
| Five Nines AS | Professional & scientific | 2025 |
| Five Nines Networks AS | Wholesale & retail | 2012 |
| Five Oceans AS | Real estate | 2020 |
| Five Seasons Norge AS | Wholesale & retail | 2013 |
| Fiven AS | Manufacturing | 2019 |
| Fives Intralogistics Spa | Manufacturing | 2016 |
| Fives Neatec AS | Professional & scientific | 2013 |
| Fivestar AS | Other services | 2021 |
| Fivestar Oslo AS | Other services | 2025 |
| Fivetimesfive Holding AS | | 2025 |
| Fivi Systemer AS | Information & communication | 2017 |
| Fivlingen Invest AS | Professional & scientific | 2015 |
| Fivø AS | Wholesale & retail | 1959 |
| Fiwe AS | Professional & scientific | 2006 |
| Fix & Drive AS | Other services | 2022 |
| Fix Capital AS | Real estate | 2024 |
| Fix El Og Rør AS | Construction | 2025 |
| Fix Ferdig AS | Construction | 2021 |
| Fix Hus AS | Construction | 2022 |
| Fix Interiør AS | Construction | 2023 |
| Fix Investments AS | Financial services | 2021 |
| Fix IT AS | Administrative & support | 2025 |
| Fix Renhold Oslo AS | Administrative & support | 2021 |
| Fix Repro AS | Manufacturing | 1972 |
| Fixel - Din Elektriker På Dagen AS | Construction | 2009 |
| Fixera AS | Construction | 2018 |
| Fixiflow AS | Information & communication | 2025 |
| Fixlab AS | Real estate | 2011 |
| Fixlist AS | Administrative & support | 2016 |
| Fixmix Games AS | Information & communication | 2013 |
| Fixo AS | Information & communication | 2022 |
| Fiyora AS | Wholesale & retail | 2025 |
| Fizorapo AS | Financial services | 2020 |
| Fjanse Holding AS | Real estate | 2007 |
| Fjaselisa AS | Arts & recreation | 2014 |
| Fjeld Blichfeldt Innsikt AS | Professional & scientific | 2011 |
| Fjeld Christensen AS | Health & social care | 1965 |
| Fjeld Consulting AS | Professional & scientific | 1999 |
| Fjeld Eiendom AS | Real estate | 1991 |
| Fjeld Freia AS | Transport & logistics | 2024 |
| Fjeld Handelsby Holding AS | Financial services | 2016 |
| Fjeld Saga AS | Transport & logistics | 2024 |
| Fjeld Shipholding AS | Transport & logistics | 2023 |
| Fjeld Shipping AS | Transport & logistics | 2024 |
| Fjeld Svea AS | Transport & logistics | 2024 |
| Fjeld-Hansen Holding AS | Professional & scientific | 1989 |
| Fjeldberg AS | | 2026 |
| Fjeldberg Consulting AS | | 2023 |
| Fjeldberg Eiendom AS | Real estate | 2023 |
| Fjeldberg Westerlin AS | Information & communication | 2020 |
| Fjeldberg Westerlin Holding AS | Professional & scientific | 2025 |
| Fjeldberg Westerlin Invest AS | | 2025 |
| Fjeldbo Holding AS | Real estate | 2010 |
| Fjeldbo Logistikk AS | Real estate | 2009 |
| Fjeldbraaten & Co AS | Professional & scientific | 2014 |
| Fjeldhus Engineering AS | Wholesale & retail | 1984 |
| Fjeldset Elverum AS | Real estate | 2011 |
| Fjeldstad & Partners AS | Professional & scientific | 2007 |
| Fjeldstad Future Holding AS | | 2019 |
| Fjeldstad Holding AS | Financial services | 2005 |
| Fjeldvang AS | | 1998 |
| Fjeldvik AS | Real estate | 2017 |
| Fjeldåsheim & Nilsen AS | Construction | 2013 |
| Fjell Elektrikeren AS | Construction | 2014 |
| Fjell Navigation AS | | 2022 |
| Fjell Og Fjordtid AS | Real estate | 2021 |
| Fjell Pluss AS | Professional & scientific | 2025 |
| Fjellandsbyen AS | Hospitality | 2013 |
| Fjellavegen 228 AS | Real estate | 2022 |
| Fjellbakeriet Eiendomsinvest AS | Real estate | 2020 |
| Fjellbakke AS | | 2025 |
| Fjellbakke Shipping AS | Transport & logistics | 2026 |
| Fjellbekken AS | | 2026 |
| Fjellblikk Holding AS | Financial services | 2014 |
| Fjellborg Invest AS | | 2018 |
| Fjellboring AS | Construction | 1962 |
| Fjellbovegen 13 AS | Real estate | 2008 |
| Fjellbovegen 13 Holding AS | Real estate | 2019 |
| Fjellboveien 11 AS | Real estate | 2019 |
| Fjellbråten Holding AS | Manufacturing | 2005 |
| Fjellbygda Skammestein AS | Real estate | 2007 |
| Fjellbygdtiltak AS | Real estate | 1961 |
| Fjellenden Holding AS | | 2005 |
| Fjellengen AS | Real estate | 2021 |
| Fjeller AS | Real estate | 1967 |
| Fjellet AS | Professional & scientific | 2017 |
| Fjellet Media AS | Information & communication | 2022 |
| Fjellfin Ans | Real estate | 2006 |
| Fjellgaard Holding AS | Information & communication | 2023 |