| Fixic AS | Other services | 2022 |
| Fjellhus Consult Ans | Professional & scientific | 1987 |
| Fjellhus Eiendom AS | Real estate | 2006 |
| Fjellhus Entreprenør AS | Professional & scientific | 2012 |
| Fjellhus Maskin AS | Real estate | 2012 |
| Fjellhus Takst Og Rådgivning AS | Real estate | 2021 |
| Fjellhus VVS AS | Construction | 2026 |
| Fjellsen Invest AS | Real estate | 2020 |
| Fledsberg Finans AS | Financial services | 2015 |
| Flexibemanning AS | Administrative & support | 2022 |
| Fleye Aps | Wholesale & retail | 2011 |
| Floberg Handel AS | Real estate | 2016 |
| Flyteknikk AS | Professional & scientific | 2022 |
| Fløien Invest AS | | 2022 |
| FM Logistikk AS | Transport & logistics | 2021 |
| FNS Holding AS | Information & communication | 2014 |
| Foldvik Invest AS | Real estate | 2006 |
| Folk&Lingo AS | Professional & scientific | 2020 |
| Folkestadbakken Utvikling AS | Real estate | 2020 |
| Folkestadtorget AS | Real estate | 2025 |
| Font AS | Information & communication | 2019 |
| Food Corp AS | Hospitality | 2025 |
| Food Court AS | Hospitality | 1991 |
| Foodpartner AS | Wholesale & retail | 2010 |
| Form Og Stanseteknikk AS | Wholesale & retail | 2005 |
| Forsikringsverket AS | Financial services | 2020 |
| Forskaling Og Støp AS | Construction | 2009 |
| Fortis Capital AS | Information & communication | 2025 |
| Fortress Fund II AS | Financial services | 2024 |
| Fortress Holding II AS | Financial services | 2024 |
| Fortress Ventures AS | Financial services | 2024 |
| Fortuna HR AS | Health & social care | 2017 |
| Fosmo & Deli AS | Wholesale & retail | 1983 |
| Fossekallen Eiendom AS | Real estate | 2006 |
| FOT1 Moss AS | Health & social care | 2026 |
| Fotland Og Myrseth Holding AS | Real estate | 2011 |
| Fotograf Christina Aakervik AS | Professional & scientific | 2020 |
| Fotograf Jon Terje Hellgren Hansen AS | Professional & scientific | 2011 |
| Fotokontoret AS | Professional & scientific | 2018 |
| Fp-Maler & Entreprenør AS | Construction | 2023 |
| Frame AS | Arts & recreation | 2022 |
| Frame Holding AS | Arts & recreation | 2022 |
| Framework AS | Information & communication | 2017 |
| Framnes Fritidssenter SA | Real estate | 1972 |
| Frank A.Jensen AS | Administrative & support | 2025 |
| Fransson Invest AS | Financial services | 2016 |
| Fraternitas Holding AS | Real estate | 2005 |
| Fredrik Fuglerud Holding AS | | 2023 |
| Fredrikstad Kulde & Ventilasjon 1 AS | Construction | 2025 |
| Freedom Invest AS | Wholesale & retail | 2005 |
| Freino Regnskap AS | Professional & scientific | 2019 |
| Fresh Food AS | Wholesale & retail | 2019 |
| Freyja Invest AS | Professional & scientific | 2013 |
| Frisenfeldt AS | | 2005 |
| Frittun AS | Real estate | 1998 |
| Front AI Norge AS | Information & communication | 2026 |
| Frosterød Eiendom AS | Real estate | 2018 |
| Frosterød Holding AS | Real estate | 2020 |
| Frosterød Takst AS | Professional & scientific | 2020 |
| Frøja Eiendom AS | Real estate | 1932 |
| Frøja Invest AS | Real estate | 2007 |
| FT Invest AS | Professional & scientific | 2022 |
| FT Utvikling AS | Real estate | 2021 |
| Fuglevikbryggen SA | Real estate | 1964 |
| Funk Holding AS | Health & social care | 2005 |
| Furuholtet Boligaksjeselskap | Households | 1950 |
| Futurelab.No AS | Professional & scientific | 2018 |
| Futurum Eiendom AS | Real estate | 2000 |
| Fyrtårnet Productions AS | Information & communication | 2015 |
| Fønix Forlag AS | Information & communication | 2017 |
| Førco Bygg AS | Real estate | 1980 |
| G Travel AS | Administrative & support | 2006 |
| G Travel Group AS | Administrative & support | 2010 |
| G.A.Knutsen Eft. AS | Real estate | 1963 |
| Gaab Invest AS | | 2018 |
| Galleri F 15 AS | Arts & recreation | 1992 |
| Gamle Thoring AS | Real estate | 2004 |
| Gammelsrød Holding AS | Professional & scientific | 2005 |
| Gamp AS | Real estate | 2011 |
| Gandalf AS | Professional & scientific | 2021 |
| Garasjelaget Bøkeveien 1 SA | Real estate | 1966 |
| Gargul Isolering AS | Construction | 2017 |
| Garmin Nordic Norway AS | Wholesale & retail | 2004 |
| Garnsjappa AS | Wholesale & retail | 2023 |
| Gasa Group Norway AS | Wholesale & retail | 2019 |
| Gastroline AS | Wholesale & retail | 2023 |
| Gastropublic Drift AS | Hospitality | 2022 |
| Gastropublic Holding AS | Hospitality | 2018 |
| Gejo Holding AS | Construction | 2023 |
| Gema Elite AS | Transport & logistics | 2014 |
| Genesis Forvaltning AS | | 2023 |
| Gent & Co AS | Construction | 2017 |
| Gentian AS | Professional & scientific | 1998 |
| Gentian Diagnostics AB Nuf | Wholesale & retail | 2021 |
| Gentian Diagnostics ASA | Professional & scientific | 2001 |
| Gerflor Scandinavia AS | Wholesale & retail | 1989 |
| Gester AS | Professional & scientific | 2023 |
| Geveko Markings Norway AS | Manufacturing | 2015 |
| Gforce AS | | 2023 |
| GFT Development AS | Manufacturing | 2018 |