| Foss Fiber Optics AS | Manufacturing | 1984 |
| Foss Hi-Fi Solution AS | Wholesale & retail | 2015 |
| Foss Technology AS | Professional & scientific | 2022 |
| Fosscompaniet AS | Manufacturing | 1995 |
| Fossheim Glass SA | Wholesale & retail | 2010 |
| Fossveien 16 Lier AS | Real estate | 2026 |
| Fostvedt AS | Financial services | 2014 |
| Fourclover Invest Norge AS | Real estate | 2007 |
| Foxtech AS | Professional & scientific | 2026 |
| FP Finnprofiles OY | Manufacturing | 2005 |
| Frabjous AS | | 2019 |
| Fradjo AS | | 2023 |
| FRAKT360 AS | Information & communication | 2025 |
| Fram Fondene AS | Financial services | 2004 |
| Fram Regnskap AS | Professional & scientific | 2017 |
| Frame Arkitektur AS | Professional & scientific | 2020 |
| Fratium Eiendom AS | Real estate | 2021 |
| Fraug AS | Wholesale & retail | 2025 |
| Freber AS | Wholesale & retail | 1984 |
| Frecar Invest AS | Wholesale & retail | 2005 |
| Frederiksen Scientific AS | Wholesale & retail | 2009 |
| Fredholt Legesenter AS | Health & social care | 2014 |
| Fredlihavna Invest II AS | | 2021 |
| Fredrik Gabrielsen Holding AS | | 2022 |
| Fredriksen Invest AS | | 2025 |
| Fredsvik Takst & Eiendom AS | Real estate | 2019 |
| Free Motion Drammen AS | Education | 2020 |
| Freedom Express AS | Transport & logistics | 2008 |
| Freefun AS | Professional & scientific | 2026 |
| Freitech AS | Information & communication | 2018 |
| Frekvens Studio AS | Professional & scientific | 2022 |
| Fremje Eiendom AS | Real estate | 2026 |
| Fremje VVS AS | Professional & scientific | 2022 |
| Fremoco Holding AS | | 2022 |
| Fresher AS | Hospitality | 2026 |
| Fretland Invest AS | | 2020 |
| Frex AS | | 2024 |
| Freyssinet Norge AS | Construction | 2008 |
| Frida + Hagberg Arkitektur AS | Professional & scientific | 2025 |
| Fridheim Invest AS | Financial services | 2017 |
| Friendly Logistic AS | Transport & logistics | 2024 |
| Frigg Technologies AS | Wholesale & retail | 2011 |
| Friis Fashion Da | Wholesale & retail | 2009 |
| Frikkadella AS | Real estate | 2010 |
| Friluft AS | Professional & scientific | 2005 |
| Friluftsmagasinet AS | Wholesale & retail | 2000 |
| Frimino AS | Wholesale & retail | 2022 |
| Friske Rom AS | Professional & scientific | 2006 |
| Frisko AS | Wholesale & retail | 2015 |
| Fritz Werner Industrie-Ausrustungen GmbH | Manufacturing | 1999 |
| Froaud Holding AS | | 2024 |
| Frogner Golfklubb AS | Hospitality | 2026 |
| From Good to Great AS | Construction | 2015 |
| Fromm Norge AS | Manufacturing | 2005 |
| Front Vest AS | Wholesale & retail | 2024 |
| Frostec AS | Administrative & support | 2026 |
| Frostec Buss AS | Administrative & support | 2026 |
| Frostec Holding AS | Administrative & support | 2026 |
| Frosthammer AS | Wholesale & retail | 2017 |
| Frostline Norge AS | Wholesale & retail | 2026 |
| Frostzone Entertainment AS | Information & communication | 2025 |
| Fructose Da | Information & communication | 2022 |
| Fruktkurven AS | Real estate | 2020 |
| Frydenfjeld AS | Financial services | 2014 |
| Frydenhøi Holding AS | | 2023 |
| Frøiland Holding AS | Real estate | 2017 |
| Frøydar AS | Professional & scientific | 2005 |
| FSL Holding AS | Real estate | 2015 |
| FT Clothing AS | Wholesale & retail | 2021 |
| Ftls AS | Information & communication | 2019 |
| Fuchs & Fuchs Holding AS | | 2021 |
| Fuck Ups Da | Arts & recreation | 2023 |
| Fuji Sushi Drammen AS | Hospitality | 2012 |
| Fulcio Eiendom AS | Real estate | 1987 |
| Fulford & Tyr Advokatfirma AS | Professional & scientific | 2013 |
| Funder Eiendom AS | Real estate | 2020 |
| Funder Holding AS | Real estate | 2007 |
| Funder Renovasjon AS | Water & waste | 2012 |
| Funksjonell Trening Og Helse AS | Education | 2014 |
| Funky Slippers Da | Arts & recreation | 2024 |
| Future Waves AS | Wholesale & retail | 2024 |
| Future-Vvs AS | Construction | 2024 |
| FW Invest AS | Real estate | 2014 |
| Fyrand Holding AS | Real estate | 2017 |
| Frydenberg AS | Manufacturing | 1970 |
| Fønix Kompetanse AS | Professional & scientific | 1997 |
| Fønix Miljø AS | Water & waste | 2018 |
| Førde & Bastiansen Da | Construction | 2000 |
| G H Nyrønning AS | Construction | 1988 |
| G K Melsom AS | Real estate | 1969 |
| G Kjemprud Engene AS | Real estate | 2014 |
| G Kjemprud Forvaltning AS | Real estate | 2014 |
| G Kjemprud Nedre Storgate AS | Real estate | 2014 |
| G M Bygg AS | Construction | 2006 |
| G&G Snekkerhus AS | Professional & scientific | 2018 |
| G. S. Five Holding AS | Education | 2023 |
| G. Sandnes Holding AS | Real estate | 2010 |
| G.L Bygg AS | Construction | 2019 |
| G.T Portservice Da | Construction | 2018 |
| G3 Bygg & Prosjektering AS | Construction | 2010 |