| Frognerveien 22 Næring AS | Real estate | 2025 |
| Frognerveien 27 AS | Households | 1930 |
| Frognerveien 30 AS | Real estate | 2019 |
| Frognerveien 33 AS | Wholesale & retail | 2024 |
| Frognerveien 50 AS | Real estate | 2005 |
| Frognerveien 50 Holding AS | Real estate | 2005 |
| Frognerveien 54 AS | Real estate | 2002 |
| Frognerveien 6 AS | Hospitality | 2014 |
| Frognerveien 6 Eiendom AS | Real estate | 2021 |
| Frognerveien 60 AS | Real estate | 2021 |
| Frognerveien 62 AS | Households | 1903 |
| Frognerveien 9B Og C AS | Real estate | 2017 |
| Frogwaves AS | Information & communication | 2016 |
| Frokostkjelleren AS | Hospitality | 2005 |
| Frolding Company AS | Financial services | 2017 |
| From AS | Real estate | 2005 |
| From Her to Eternity AS | Wholesale & retail | 2018 |
| From Invest AS | Wholesale & retail | 2021 |
| Fromage Fermier AS | Wholesale & retail | 2018 |
| Fromagerie AS | Wholesale & retail | 2006 |
| Fromber AS | Administrative & support | 2017 |
| Frometas AS | | 2013 |
| Front Bygg & Service AS | Construction | 2024 |
| Front Bygg AS | Real estate | 2011 |
| Front Eiendom Norge AS | Real estate | 2010 |
| Front Entreprenør AS | Construction | 1998 |
| Front Gruppen AS | Professional & scientific | 2006 |
| Front Information AS | Information & communication | 2015 |
| Front Invest Da | Information & communication | 2001 |
| Front Leadership AS | Education | 2015 |
| Front Ocean Management AS | Transport & logistics | 2021 |
| Front of House Sports AS | Professional & scientific | 2026 |
| Front Real Estate AS | Real estate | 2020 |
| Front Room AS | Professional & scientific | 2024 |
| Front Row AS | Real estate | 2022 |
| Front Row Production AS | Arts & recreation | 2024 |
| Front Rådgivning AS | Professional & scientific | 1994 |
| Front Services AS | Information & communication | 2025 |
| Front Shipping AS | Transport & logistics | 2023 |
| Front Society AS | Wholesale & retail | 2006 |
| Front Systems AS | Information & communication | 2007 |
| Frontcore AS | Professional & scientific | 2009 |
| Frontec AS | Wholesale & retail | 2012 |
| Fronth Advokatfirma AS | Professional & scientific | 2012 |
| Fronth AS | Professional & scientific | 1986 |
| Fronth-Sagen Holding AS | Professional & scientific | 2023 |
| Fronthouse Consulting AS | Information & communication | 2020 |
| Fronthub Holding AS | Financial services | 2018 |
| Frontier Eiendom AS | Real estate | 2014 |
| Frontier Finance AS | Professional & scientific | 2023 |
| Frontir Production AS | Administrative & support | 2007 |
| Frontline Grünerløkka Eiendomsmegling AS | Real estate | 2015 |
| Frontline Management AS | Transport & logistics | 1997 |
| Frontline Muay Thai Kampsportsenter AS | Arts & recreation | 2020 |
| Frontline Oppgjør AS | | 2026 |
| Frontor AS | | 2021 |
| Frontside Holding AS | Real estate | 2017 |
| Froskelosk AS | | 2023 |
| Frosna Group AS | Construction | 2025 |
| Frost Arkitekter AS | Professional & scientific | 2014 |
| Frost Capital AS | | 2022 |
| Frost Consulting AS | Information & communication | 2001 |
| Frost Engineering AS | Professional & scientific | 2026 |
| Frost Investering AS | Real estate | 2005 |
| Frost Kvadrat AS | Professional & scientific | 2003 |
| Frost Labs AS | Information & communication | 2026 |
| Frost Norge AS | Wholesale & retail | 2018 |
| Frost Partners AS | Professional & scientific | 2026 |
| Frost Production AS | Information & communication | 2000 |
| Frost Produkt AS | Professional & scientific | 2013 |
| Frost Retail Holding AS | | 2016 |
| Frost Retail Invest AS | Real estate | 2016 |
| Frost Retail Properties AS | Real estate | 1993 |
| Frost Utvikling AS | Real estate | 2006 |
| Frostaveien Utvikling AS | Real estate | 2020 |
| Frostbite Industries AS | | 2023 |
| Frostbyte Group AS | Information & communication | 2026 |
| Frostpharma AB Nuf | Professional & scientific | 2022 |
| Froyta Invest AS | | 2021 |
| Frozen Assets AS | | 2025 |
| Frozen Memories AS | Information & communication | 2021 |
| Frozt Reklame AS | Professional & scientific | 2013 |
| Frozti Foods AS | Wholesale & retail | 2026 |
| FRS Invest AS | | 2021 |
| Fru Alstad Invest AS | Arts & recreation | 2020 |
| Fru Baron AS | Professional & scientific | 2008 |
| Fru Berg AS | Wholesale & retail | 2003 |
| Fru Hang AS | Manufacturing | 2021 |
| Fru Hang Holding AS | Manufacturing | 2022 |
| Fru Kvist AS | Wholesale & retail | 2015 |
| Fru Lyng AS | Wholesale & retail | 1990 |
| Fru Rese AS | Wholesale & retail | 2007 |
| Fruco AS | Real estate | 2015 |
| Fructus AS | Real estate | 2004 |
| Fruen B Holding AS | Real estate | 2019 |
| Fruens Finans AS | Real estate | 2014 |
| Fruit Invest AS | | 2019 |
| Fruits Media AS | Information & communication | 2026 |
| Fruitysinger AS | Information & communication | 2026 |
| Frukt-Import AS | Wholesale & retail | 1983 |