| Fazile AS | Information & communication | 2020 |
| FB Invest Oslo AS | Financial services | 2013 |
| FB Kjeder AS | Manufacturing | 2016 |
| FB Regnskap AS | Professional & scientific | 2021 |
| FB41 BRL Invest AS | | 2024 |
| FBA2019 AS | Real estate | 2018 |
| FBA2020 AS | Real estate | 2020 |
| FBA2021 AS | Real estate | 2021 |
| FBA2022 AS | Real estate | 2022 |
| FBA2022 NR II AS | Real estate | 2022 |
| FBA2023 AS | | 2023 |
| Fbam AS | | 2022 |
| FBB Entreprenør AS | Real estate | 2022 |
| FBB Entreprenør Nda AS | Real estate | 2024 |
| FBB Prosjekt 11 AS | Real estate | 2020 |
| FBB Prosjekt 30 AS | Real estate | 2024 |
| FBB Prosjekt 32 AS | Real estate | 2024 |
| FBB Prosjekt 33 AS | Real estate | 2024 |
| FBB Prosjekt 34 AS | Real estate | 2025 |
| FBB Prosjekt 36 AS | Real estate | 2025 |
| FBB Prosjekt 37 AS | Real estate | 2025 |
| FBB Prosjekt 38 AS | Real estate | 2025 |
| FBB Ve AS | Real estate | 2019 |
| Fbba AS | Financial services | 2019 |
| Fbba II AS | | 2020 |
| Fbe Invest AS | | 2023 |
| FBF Ansatte AS | | 2021 |
| FBF Norefjell AS | Real estate | 2022 |
| FBG Holding AS | Professional & scientific | 2025 |
| FBH Invest AS | | 2004 |
| FBH Trading AS | Financial services | 2020 |
| Fbi Invest AS | Professional & scientific | 2009 |
| Fbj-Consulting AS | Real estate | 2005 |
| FBN Utvikling AS | Real estate | 2018 |
| FBV 38-40 AS | Real estate | 2016 |
| FBW Holding AS | | 2024 |
| FC Capital AS | | 2020 |
| FC Holding 41 AS | | 2026 |
| FC Holding 42 AS | | 2026 |
| FC Holding 43 AS | | 2026 |
| FC Holding 44 AS | | 2026 |
| FC Holding 45 AS | | 2026 |
| FC Hylle AS | | 2021 |
| FC Invest AS | | 2025 |
| FC Oslo AS | Other services | 2012 |
| FC Parkett Ans | Construction | 2007 |
| FC Quiz AS | Information & communication | 2021 |
| FC Well Invest AS | Mining & quarrying | 2010 |
| FCB Invest AS | | 2021 |
| FCC Event & Catering AS | Hospitality | 2023 |
| FCC Food AS | Hospitality | 2012 |
| Fcfs Holding AS | | 2024 |
| FCN Holding AS | Education | 2017 |
| FD Consult Og Eiendom AS | Real estate | 2025 |
| FDN Holding AS | | 2018 |
| FDN Invest AS | Professional & scientific | 2010 |
| FDP AS | Wholesale & retail | 2015 |
| FDS Eiendom AS | Real estate | 2020 |
| FDS Holding AS | Professional & scientific | 2022 |
| FDT Holding AS | | 2021 |
| FDV Services AS | Administrative & support | 2019 |
| Fdvu Entreprenør AS | Real estate | 2026 |
| Fe Consult AS | Professional & scientific | 2026 |
| Fe Holding 19 AS | | 2021 |
| Fe Holding 20 AS | | 2025 |
| Fe Holding 21 AS | | 2025 |
| Fe Holding 22 AS | | 2025 |
| Fe Holding 23 AS | | 2025 |
| Fea AS | Professional & scientific | 2022 |
| Fealty Invest AS | Professional & scientific | 2019 |
| Feandi AS | Professional & scientific | 2023 |
| Fear of Music Da | Information & communication | 2018 |
| Fearnley Advisors AS | Professional & scientific | 2012 |
| Fearnley Asset Management AS | Financial services | 1975 |
| Fearnley Business Management AS | Professional & scientific | 1986 |
| Fearnley Høyrente AS | Financial services | 2023 |
| Fearnley Offshore AS | Transport & logistics | 2002 |
| Fearnley Offshore Supply AS | Transport & logistics | 2007 |
| Fearnley Offshore Supply Valuations AS | Professional & scientific | 2024 |
| Fearnley Real Estate AS | Real estate | 2018 |
| Fearnley Securities AS | Financial services | 1987 |
| Fearnleys Valuations AS | Professional & scientific | 2022 |
| Fearnleysgate 4 AS | Households | 1932 |
| Featment AS | Information & communication | 2024 |
| Feature AS | | 2020 |
| Feature Football Agency AS | Education | 2023 |
| Febak AS | | 2024 |
| Feber AS | | 2012 |
| Feber&Kokos AS | Information & communication | 2024 |
| Fecini AS | Professional & scientific | 2024 |
| Fed Invest AS | | 2026 |
| Feder AS | | 1992 |
| Federica Vico AS | Professional & scientific | 2021 |
| Fedje Eiendom AS | Real estate | 2019 |
| Fedje Mek Eiendom AS | Real estate | 2024 |
| Fedon Akademi AS | Education | 2004 |
| Fedon Helse AS | Wholesale & retail | 2006 |
| Fedra AS | Financial services | 2013 |
| Feed AS | Information & communication | 2016 |
| Feed Design AS | Professional & scientific | 2021 |