| Factibilis Eiendom AS | Real estate | 2020 |
| Fagiri Holding AS | | 2026 |
| Fai AS | | 2024 |
| Falconstor Software | Wholesale & retail | 2008 |
| Falkum Garasjelag SA | Transport & logistics | 1982 |
| Falkum Holding AS | Real estate | 2005 |
| Falkum Invest Holding 1 AS | Financial services | 2003 |
| Falkum Invest Holding 2 AS | Professional & scientific | 2004 |
| Falkum Kebab Og Pizza Ans | Hospitality | 1995 |
| Falkum Legesenter AS | Real estate | 1993 |
| Falkum Legesenter Drift AS | Health & social care | 2020 |
| Falkum Legesenter Rahimi AS | Health & social care | 2026 |
| Falkum Matsenter AS | Real estate | 1985 |
| Falkum Rør AS | Construction | 2016 |
| Falkum Sport AS | Wholesale & retail | 2015 |
| Familie Imperium AS | | 2026 |
| Farouq Jalabi Holdning AS | | 2025 |
| Farstad & Co AS | Wholesale & retail | 2018 |
| Farstad Group AS | Real estate | 1984 |
| Fasadeglass AS | Wholesale & retail | 2016 |
| Fasadeteknikk AS | Construction | 2020 |
| Fast Travel AS | Information & communication | 2023 |
| FBT Invest AS | Transport & logistics | 2019 |
| FC Holding AS | | 2020 |
| FC Material Handling AS | Wholesale & retail | 2012 |
| Fe 412 Holding AS | | 2023 |
| Fe Utleie AS | Real estate | 2022 |
| Feelgood Skien AS | Arts & recreation | 2019 |
| Feev AS | Financial services | 2012 |
| Fehn Holding AS | Wholesale & retail | 2005 |
| Felix Utvikling AS | Information & communication | 2024 |
| Feradov AS | Hospitality | 2023 |
| Feriesenteret Herkules AS | Administrative & support | 1998 |
| Ferrotek Da | Wholesale & retail | 1990 |
| Fersk Og Ferdig Selskapsmat AS | Hospitality | 2021 |
| Ferwil Holding AS | Financial services | 2015 |
| Feste Eiendom Sør Øst AS | Real estate | 2015 |
| FHB Invest AS | Financial services | 2015 |
| Fheb Holding AS | | 2019 |
| FHH Eiendom AS | Real estate | 2019 |
| Fia Technologies AS | Professional & scientific | 2024 |
| Fiducia Norway AS | Real estate | 1958 |
| Fiha Holding AS | Construction | 2016 |
| Fijo Invest AS | Wholesale & retail | 2005 |
| Fill Bygg Da | Construction | 2010 |
| Filtergiganten AS | Wholesale & retail | 2023 |
| Fina Holding AS | Professional & scientific | 2013 |
| Final Design AS | Wholesale & retail | 2007 |
| Final Supplies Norway AS | Wholesale & retail | 2004 |
| Finans & Regnskap AS | Professional & scientific | 2003 |
| Findal Automasjon AS | Professional & scientific | 2026 |
| Findal Invest AS | | 2017 |
| Finn En Bolig AS | Real estate | 2020 |
| Finnjo AS | Manufacturing | 2012 |
| Fino Projekt Ug (Haftungsbeschränkt) Nuf | Professional & scientific | 2026 |
| Finsegruppen AS | | 2020 |
| Finstad Auto AS | Other services | 2023 |
| Firkløver Invest AS | Real estate | 2019 |
| Firo AS | Wholesale & retail | 2013 |
| Fishtail AS | Information & communication | 2014 |
| Fisk I Dag Da | Wholesale & retail | 2004 |
| Fixano AS | Information & communication | 2025 |
| Fjel AS | Wholesale & retail | 2024 |
| Fjel Drift AS | Wholesale & retail | 2024 |
| Fjel Eiendom AS | | 2026 |
| Fjeld Eiendom AS | Real estate | 1997 |
| Fjeld Holding AS | Hospitality | 2005 |
| Fjeldavlie Invest AS | Financial services | 2005 |
| Fjelldalen AS | Administrative & support | 2021 |
| Fjellknatten Holding AS | Water & waste | 2020 |
| Fjellreven Eiendom AS | Real estate | 2021 |
| Fjellro Holding AS | Construction | 2024 |
| Fjellseter Skogveglag SA | Real estate | 2015 |
| Fjellsport Eiendom AS | Real estate | 2003 |
| Fjellvåken Eiendom AS | Real estate | 2005 |
| Fjellvåken Eiendom Holding AS | Wholesale & retail | 2017 |
| Fjellvåken Holding AS | Wholesale & retail | 2003 |
| Fjellvåken Invest AS | Real estate | 2015 |
| Fjo Invest AS | Real estate | 2006 |
| Fjordnor AS | Wholesale & retail | 2022 |
| Fjuz Holding AS | Real estate | 2021 |
| Fjuz Invest AS | Real estate | 2022 |
| Fjuz Kommunikasjon AS | Professional & scientific | 2014 |
| Fjærekilen Entreprenør AS | Construction | 2021 |
| Fjærekilen Sandtak AS | Mining & quarrying | 2020 |
| Flatmo Inneklima Vestfold Telemark AS | Construction | 2020 |
| Flekkeråsen Holding AS | Other services | 2024 |
| Flex Kjørbekk AS | Arts & recreation | 2025 |
| Flex Nenset AS | Arts & recreation | 2019 |
| Flex Skien AS | Arts & recreation | 2025 |
| Flexi Holding AS | Real estate | 2015 |
| Flexus AS | Professional & scientific | 2018 |
| Flink Media AS | Professional & scientific | 2012 |
| Flislegger Tomas Holm AS | Construction | 2023 |
| Floodmyrvegen 14 AS | Real estate | 2026 |
| Floraterapi AS | Health & social care | 2018 |
| Flydebrygga AS | Real estate | 2020 |
| Flytaxi AS | Professional & scientific | 2020 |
| Flyttditt AS | Transport & logistics | 2025 |
| Fløtningen Park AS | Real estate | 2007 |