| Finnestadveien 28 AS | Real estate | 2005 |
| Finnestadveien 38 AS | Real estate | 2015 |
| Finnhaugen Invest AS | Financial services | 2018 |
| Finnlilli AS | | 2022 |
| Finnmark Tidal Energy AS | | 2014 |
| Finnmin Eiendom AS | Real estate | 2005 |
| Finnsisu Renhold Da | Administrative & support | 1999 |
| Finnskogen Holding AS | | 2024 |
| Finnslettheia AS | Professional & scientific | 2026 |
| Finnsnes Handelspark Invest AS | | 2020 |
| Finnson Holding AS | | 2024 |
| Finntekk AS | Financial services | 2018 |
| Finnvei AS | Information & communication | 2013 |
| Finoffice I AS | Real estate | 2022 |
| Finplustech AS | Information & communication | 2018 |
| Finpool AS | Real estate | 2020 |
| Finpå Assist AS | Administrative & support | 2026 |
| Finsbråten AS | Wholesale & retail | 1998 |
| Finse Eiendom AS | Real estate | 2001 |
| Finse Forsikring AS | Financial services | 2001 |
| Finse Invest AS | | 2020 |
| Finske Tregulvspesialister Da | Construction | 2002 |
| Finsnekkeren AS | Construction | 2013 |
| Finstad 2024 AS | Hospitality | 2024 |
| Finstad AS | | 1988 |
| Finstad Stillas AS | Construction | 2012 |
| Finstadhagan 17 AS | Real estate | 2024 |
| Finstadjordet Invest AS | Real estate | 1995 |
| Finstadvegen 70 AS | Real estate | 2020 |
| Finstua AS | Hospitality | 2013 |
| Finsupport AS | Professional & scientific | 1987 |
| Fint Folk AS | Arts & recreation | 2020 |
| Fint Utført AS | Construction | 2025 |
| Fintech Holding AS | | 2021 |
| Fintech Innovation AS | Professional & scientific | 2016 |
| Fintech Invest AS | Information & communication | 2024 |
| Fintech Mundi AS | Professional & scientific | 2015 |
| Fintech Neo AS | Information & communication | 2016 |
| Fintech Neo Group AS | Information & communication | 2016 |
| Fintech Vision AS | Professional & scientific | 2021 |
| Fintegrity Software AS | Information & communication | 2025 |
| Finterai AS | Professional & scientific | 2021 |
| Finto AS | Real estate | 2006 |
| Finvest AS | Professional & scientific | 2019 |
| Finvestas Ans | Real estate | 1999 |
| Finvold Prosjekt Administrasjon AS | Real estate | 1989 |
| Finyield AS | Financial services | 2014 |
| Finzi Consulting AS | Professional & scientific | 2024 |
| Fiol Invest AS | Real estate | 2012 |
| Fiolinbygger Jacob Von Der Lippe AS | Manufacturing | 2007 |
| Fiolinmaker Magnus Nedregård AS | Other services | 2018 |
| Fiolo AS | | 2024 |
| Fiolvegen 13 Tromsø AS | Real estate | 2019 |
| Fiolvegen Tromsø AS | Real estate | 2019 |
| Fiolveien 27 AS | Real estate | 2021 |
| Fiolveien 6 AS | Real estate | 2015 |
| Fiona Stories AS | Wholesale & retail | 2024 |
| Fiora Film AS | Information & communication | 2026 |
| Fiorano AS | Administrative & support | 2009 |
| Fiorentino AS | Hospitality | 2024 |
| Fiori Capital II AS | | 2025 |
| Fiori Capital III AS | | 2025 |
| Fiori Fund I AS | Financial services | 2023 |
| Fiori Fund II AS | Financial services | 2025 |
| Fiori Management AS | Financial services | 2023 |
| Fiori SPV I AS | Financial services | 2025 |
| Fipe Invest AS | Real estate | 2022 |
| Firda AS | Professional & scientific | 2021 |
| Fire 4 AS | | 2023 |
| Fire Holdco AS | Construction | 2022 |
| Fire Protection Academy AS | Education | 2023 |
| Fire Safety AS | Professional & scientific | 2016 |
| Fire Topco AS | Construction | 2022 |
| Fire Årstider AS | Wholesale & retail | 1983 |
| Fire:Nitten AS | | 2025 |
| Firea AS | Professional & scientific | 2019 |
| Firecon AS | Financial services | 2005 |
| Firee-Gruppen AS | Information & communication | 2023 |
| Firefarm AS | Information & communication | 2023 |
| Firefireto AS | | 2025 |
| Firefly Design AS | Professional & scientific | 2021 |
| Firegrader AS | Information & communication | 2012 |
| Firehill Invest AS | | 2023 |
| Firemoth AS | | 2026 |
| Firemoth Entertainment AS | Arts & recreation | 2026 |
| Firenze Frukt Og Grønt Ans | Wholesale & retail | 2004 |
| Firepe AS | Real estate | 2010 |
| FIREPUMA3000 AS | Financial services | 2023 |
| Firetech AS | Information & communication | 2016 |
| Firi AS | Financial services | 2017 |
| Firiol Invest AS | Real estate | 2016 |
| Firma Carl M Olsen AS | Real estate | 1995 |
| Firma Firmalund AS | Financial services | 2014 |
| FIRMA24 AS | Professional & scientific | 2012 |
| Firmaet Carl Heftye, Eiere Espen Og Trude Mossin Ans | Wholesale & retail | 1989 |
| Firmahjelp AS | Professional & scientific | 2013 |
| Firmainvest AS | Construction | 2017 |
| Firmakonto AS | Information & communication | 2024 |
| Firmament AS | Real estate | 2006 |
| Firmli AS | Information & communication | 2024 |