| Frirom AS | Professional & scientific | 2026 |
| Frisikt Sør AS | Professional & scientific | 2023 |
| Frisk Hest AS | Agriculture & fishing | 2012 |
| Friskere Ansatt AS | Health & social care | 2024 |
| Fristeren Catering AS | Hospitality | 2019 |
| Frisør Extrem Da | Other services | 2012 |
| Frisør Malin Winterkjær AS | Other services | 2026 |
| Frisørhuset Ahead AS | Other services | 2024 |
| Frisørsalongen Ernst AS | Other services | 2012 |
| Fritidsbygg AS | Real estate | 2011 |
| Fritidsbygg Eiendom AS | Real estate | 2009 |
| Fritzman Invest AS | Real estate | 2013 |
| Frivold Invest AS | Real estate | 2017 |
| Frivold Lund AS | Wholesale & retail | 2001 |
| Frivold Søm AS | Wholesale & retail | 2001 |
| Frizen AS | Wholesale & retail | 1992 |
| FRK Hangeland AS | Hospitality | 2012 |
| FRK Larsen Bygg AS | Construction | 2012 |
| FRK Larsen Eiendom AS | Real estate | 2017 |
| FRK Olsen Ans | Wholesale & retail | 2025 |
| Frode Kjetså AS | Wholesale & retail | 2015 |
| Front AS | Real estate | 2019 |
| Front-Bygg AS | Real estate | 2022 |
| Front-Eiendom AS | Real estate | 2019 |
| Front-Utvikling AS | Real estate | 2019 |
| Frontbyte AS | Information & communication | 2018 |
| Frontier House AS | Real estate | 1963 |
| Frontier Shipbroking AS | Transport & logistics | 2005 |
| Frost Dental Lab AS | Manufacturing | 2009 |
| Frostglød AS | Manufacturing | 2024 |
| Fruens Handel Invest AS | Manufacturing | 2018 |
| Fruens Holding AS | Manufacturing | 2023 |
| Fruermedfrø AS | | 2006 |
| Fruitzone AS | Real estate | 2017 |
| FRUKT OG TOBAKK Thorstein Aanensen Åse M Aanensen | Wholesale & retail | 1975 |
| Fruktveien 7 AS | Real estate | 2023 |
| Frustøl AS | Construction | 1984 |
| Frustøl Consulting AS | Financial services | 2016 |
| Frustøl Eiendom AS | Real estate | 2003 |
| Frustøl Holding AS | Real estate | 2003 |
| Frustøl Pukkverk AS | Mining & quarrying | 2014 |
| Frydenborg AS | Wholesale & retail | 2023 |
| Frydendal Eiendom AS | Real estate | 1995 |
| Frydenfeldt AS | Real estate | 2021 |
| Frydenlunden AS | | 2022 |
| Frøknas Leiligheter AS | Real estate | 2023 |
| Frøya Data AS | Information & communication | 2002 |
| Frøya Engineering AS | Professional & scientific | 2010 |
| Frøya-Eiendom AS | | 2005 |
| Frøysaa Holding AS | Real estate | 1998 |
| FS Eiendom Sør AS | Real estate | 2022 |
| FS Holding Sør AS | Real estate | 2015 |
| FS Mur AS | Construction | 2015 |
| Fseven Fritid AS | Real estate | 2007 |
| Fstb Group AS | | 2026 |
| FT Partners AS | | 2023 |
| FT Utleie AS | Professional & scientific | 2018 |
| Ft-Bygg AS | Construction | 2015 |
| Ft-Eiendom AS | Real estate | 2019 |
| Ft-Invest AS | Construction | 2022 |
| FTP Invest AS | | 2021 |
| Fundamentum AS | Wholesale & retail | 2012 |
| Funkydoris AS | Professional & scientific | 2012 |
| Furnit AS | Information & communication | 2025 |
| Furtebotn AS | | 2021 |
| Furuborg AS | Health & social care | 2018 |
| Furukvist Bygg AS | Construction | 2021 |
| FUSION4 AS | | 2025 |
| Fussell Holding AS | | 2021 |
| Future Commodities AS | | 2023 |
| Future Production AS | Wholesale & retail | 2002 |
| Future Production Holding AS | Wholesale & retail | 2013 |
| Future Services AS | Manufacturing | 2018 |
| Future Well Control AS | Professional & scientific | 2015 |
| Futurebuilding AS | Information & communication | 2022 |
| FX Fomo AS | Information & communication | 2025 |
| Fybikon AS | Wholesale & retail | 1971 |
| Fylkesbakken AS | Real estate | 2022 |
| Fysioterapeut Tine C Kelly Frigstad AS | Health & social care | 2019 |
| Fædrelandsvennen AS | Information & communication | 2006 |
| Fædrelandsvennen Ung AS | Arts & recreation | 2026 |
| Føe Eiendom AS | Real estate | 2026 |
| Føe Invest AS | | 2022 |
| Førsteinntrykk AS | Wholesale & retail | 2016 |
| G Eiendom AS | Real estate | 2002 |
| G Eiendom Bolig AS | Real estate | 2007 |
| G Eiendom Holding AS | Real estate | 1995 |
| G Eiendom Kongsgård AS | Real estate | 2005 |
| G Eiendom Markens AS | Real estate | 1969 |
| G Eiendom Stemmane AS | Real estate | 2013 |
| G Eiendomsdrift AS | Real estate | 2022 |
| G Golf AS | Wholesale & retail | 2021 |
| G H Eiendom AS | Real estate | 1986 |
| G Nordby Cycle & Maskinforretning AS | Wholesale & retail | 1917 |
| G O Tørnkvist AS | | 2024 |
| G S Holding AS | | 2005 |
| G SP1 AS | Real estate | 2022 |
| G SP2 AS | Real estate | 2022 |
| G SP3 AS | Real estate | 2022 |
| G&G Design AS | Wholesale & retail | 2013 |