| FS Mgmt AS | Information & communication | 2002 |
| FS Midco AS | Information & communication | 2023 |
| FS Regnskap AS | Professional & scientific | 2024 |
| Fsa Holding AS | | 2019 |
| FSF Capital AS | | 2023 |
| FSG Anleggsmaskiner AS | Administrative & support | 2021 |
| FSG Holdco AS | Professional & scientific | 2021 |
| FSG Holding AS | Construction | 2021 |
| FSH Holdco AS | Information & communication | 2023 |
| FSH Holding AS | Professional & scientific | 2017 |
| FSK Holding AS | Information & communication | 2013 |
| Fskro Ans | Hospitality | 1990 |
| FSN Capital Partners AS | Professional & scientific | 1999 |
| FSN Holding Norway IV AS | Financial services | 2016 |
| FSN Productions AS | Information & communication | 2021 |
| FSP Holding AS | | 2020 |
| FST Invest AS | Real estate | 2020 |
| Fsu I AS | Real estate | 1997 |
| Fsu II AS | Real estate | 2016 |
| Fsu P2 AS | Real estate | 2022 |
| Fsu P3 AS | Real estate | 2022 |
| Fsubsea AS | Manufacturing | 2013 |
| Fsunde Invest AS | Health & social care | 2020 |
| FT Aviation AS | Professional & scientific | 2025 |
| FT Boron AS | Real estate | 2009 |
| FT Holding AS | Real estate | 2005 |
| FT Produkter AS | Wholesale & retail | 2018 |
| FT System S.R.L. | Wholesale & retail | 2012 |
| FT7 Holding AS | | 2024 |
| FTB AS | | 2021 |
| FTC Football Transfer Company No AS | Professional & scientific | 2025 |
| Fte Locations Norge AS | Information & communication | 2020 |
| FTF Consulting AS | Professional & scientific | 2020 |
| FTK Holding AS | Real estate | 2020 |
| FTL AS | Wholesale & retail | 2020 |
| FTM Boligforvaltning AS | Real estate | 2019 |
| FTM Holding AS | Real estate | 2005 |
| FTS Capital AS | | 2024 |
| FTS Invest AS | Financial services | 2018 |
| Fu Capital AS | | 2026 |
| Fuad Azbarga AS | Health & social care | 2025 |
| Fubar Consulting AS | Information & communication | 2025 |
| Fuchs Lubricants Norway AS | Wholesale & retail | 2014 |
| Fuckboy Holding & Invest AS | | 2021 |
| Fudi Røa AS | Wholesale & retail | 2024 |
| Fuego AS | Financial services | 2012 |
| Fuel & Food AS | Information & communication | 2015 |
| Fueled Up AS | Wholesale & retail | 2024 |
| Fufa AS | | 2025 |
| Fugazi Property AS | Information & communication | 2018 |
| Fugemesteren AS | Construction | 2021 |
| Fugemesteren Drift AS | Real estate | 2021 |
| Fugemesteren Holding AS | Construction | 2015 |
| Fugleberg Executive Search AS | Professional & scientific | 2020 |
| Fugleberg Gruppen Holding AS | Professional & scientific | 2020 |
| Fuglekongen Familiebarnehage AS | Education | 2022 |
| Fuglemyra Eiendom AS | Real estate | 2017 |
| Fuglemyra Invest AS | Real estate | 2010 |
| Fuglemyra-Garasjene SA | Real estate | 1959 |
| Fuglen Coffee Roasters Oslo AS | Manufacturing | 2014 |
| Fuglene AS | Information & communication | 2013 |
| Fugleredet Eiendom AS | Real estate | 2015 |
| Fuglesang Fritids Og Feriesenter AS | Real estate | 2021 |
| Fuglesang Invest AS | Financial services | 2013 |
| Fuglesang Og Flatmo Da | Arts & recreation | 2023 |
| Fuglesangen AS | Professional & scientific | 2020 |
| Fuglesangs AS | Wholesale & retail | 1916 |
| Fuglesangs Tech AS | Wholesale & retail | 2002 |
| Fugletoppen AS | Real estate | 2003 |
| Fugleåsen 5 AS | Real estate | 2012 |
| Fugleåsen 6 AS | Real estate | 2016 |
| Fugleåsen 7 AS | Real estate | 2012 |
| Fugleåsen Infrastruktur AS | Real estate | 2017 |
| Fugleåsen Logistikk AS | Real estate | 2009 |
| Fuglseth Invest AS | | 2021 |
| Fugro Norway AS | Professional & scientific | 1994 |
| Fuica Multiservice AS | Administrative & support | 2008 |
| Fujii AS | Professional & scientific | 2026 |
| Fujikawa AS | Professional & scientific | 2021 |
| Fukuoka Stainless 3 AS | Transport & logistics | 2022 |
| Fukuoka Stainless AS | Transport & logistics | 2022 |
| Fulcio Media AS | Professional & scientific | 2024 |
| Fulcr AS | Information & communication | 2026 |
| Fulcrum Consulting AS | Information & communication | 2007 |
| Fulcrum Holding AS | Education | 2021 |
| Full Bredde AS | Professional & scientific | 2005 |
| Full Circle Rainbow AS | Information & communication | 2024 |
| Full Court AS | | 2024 |
| Full Gasje AS | Information & communication | 2022 |
| Full Kontroll Ans | Professional & scientific | 2000 |
| Full Renovering AS | Construction | 2018 |
| Full Rulle Invest AS | Real estate | 2003 |
| Full Storm Invest AS | | 2019 |
| Full Vase AS | Arts & recreation | 2024 |
| Full Wave Limited | Real estate | 2020 |
| Full-Stack Development AS | Information & communication | 2025 |
| Fullbooket AS | Professional & scientific | 2019 |
| Fuller Holding AS | Real estate | 2017 |
| Fullstack AS | Information & communication | 2016 |
| Fullstack Holding AS | Financial services | 2015 |