| Erik Bakke Holding AS | Hospitality | 2005 |
| Erlend Nicolaisen Invest AS | | 2019 |
| Erock Da | Wholesale & retail | 2021 |
| Erruf Holding AS | Professional & scientific | 2019 |
| Esbe Eiendom AS | Real estate | 2012 |
| Esmo Restaurantdrift AS | Hospitality | 1997 |
| Espector AS | Real estate | 2007 |
| Espehaugen Eiendom AS | Real estate | 2006 |
| Ess Rådgivning AS | Professional & scientific | 2025 |
| Esya Holding AS | | 2021 |
| Eurisco Service Ans | Manufacturing | 2000 |
| Europe Domains Ltd | Administrative & support | 2015 |
| Evaki AS | Wholesale & retail | 2017 |
| Evjahr AS | | 2016 |
| Evolov AS | Professional & scientific | 2023 |
| Evonova AS | Information & communication | 2023 |
| Evori AS | Information & communication | 2025 |
| Executive Minds AS | Education | 2015 |
| Exid AS | Arts & recreation | 2018 |
| Exportmaker AS | Professional & scientific | 2025 |
| Fab Eiendom AS | Real estate | 2026 |
| Facesico Holding AS | Hospitality | 2022 |
| Fagskolen Diakonova AS | Education | 2018 |
| Fairhill Invest AS | Education | 2020 |
| Fairhill Technologies AS | Information & communication | 2025 |
| Falk Sikkerhetssystemer Ans | Construction | 1994 |
| Falkum Psykiatri AS | Health & social care | 2010 |
| Fat City AS | Financial services | 2013 |
| Favn Studio AS | Other services | 2022 |
| Fedex Express Norge AS | Transport & logistics | 1985 |
| Fellesgarasjene Odalsgata AS | Real estate | 2022 |
| Felleskjøpet Agri SA | Wholesale & retail | 1896 |
| Fetsund Stasjon AS | Real estate | 2017 |
| Fiberdrift AS | Construction | 2018 |
| Fimi AS | | 2015 |
| Finance Interims Todo AS | Real estate | 2012 |
| Firkort AS | Professional & scientific | 2005 |
| First Accounting AS | Professional & scientific | 2016 |
| First Season AS | Hospitality | 2024 |
| Fiskerud Invest AS | Financial services | 2016 |
| Fiskestrand Invest AS | Real estate | 2007 |
| Fixtech AS | Other services | 2022 |
| Fjeldbo Invest AS | Real estate | 2008 |
| Fjell Økonomi AS | Professional & scientific | 2025 |
| Fjellet Garasjelag SA | Households | 1961 |
| Fjellhamar Park I AS | Real estate | 2001 |
| Fjellhamar Park II AS | Real estate | 2001 |
| Fjellhamar Park III AS | Real estate | 2001 |
| Fjordvik AS | Construction | 2022 |
| Fjorten Tolv Fjorten AS | Professional & scientific | 1995 |
| Fjærestrand Frukt Og Emballasje AS | Wholesale & retail | 2013 |
| Fjøs Fashion & Living AS | Wholesale & retail | 2021 |
| FK Maskinutleie AS | Administrative & support | 2020 |
| Flateby Sentrum AS | Real estate | 2023 |
| Flatline AS | Information & communication | 2026 |
| Fleet Web Hosting Ltd | Administrative & support | 2015 |
| Flislegger På Hjul AS | Construction | 2023 |
| Flora Teater SA | Arts & recreation | 2020 |
| Floraveien Invest AS | Real estate | 2005 |
| FM Media Nuf | Information & communication | 2016 |
| Folkets Hus Lillestrøm AS | Real estate | 2015 |
| Folkets Hus Lillestrøm SA | Real estate | 1915 |
| Foodtruck Norge AS | Hospitality | 2025 |
| Forsikringshuset AS | Financial services | 2014 |
| Forum Næringsmegling AS | Real estate | 1986 |
| Forza Fugla AS | Wholesale & retail | 2020 |
| Foss Event AS | Arts & recreation | 2020 |
| Fotofocus AS | Professional & scientific | 2010 |
| Foureyes AS | Information & communication | 2024 |
| Fra Seoul AS | Wholesale & retail | 2023 |
| Fram Finans & Forsikring AS | | 2020 |
| Fredde Holding AS | | 2019 |
| Fredly Drift AS | Wholesale & retail | 1994 |
| Fredly Eiendom AS | Real estate | 2023 |
| Fredrik Foto AS | Professional & scientific | 2025 |
| Fredstad Logistikk AS | Transport & logistics | 2017 |
| Fredstad Utleie AS | Administrative & support | 2022 |
| Fremad AS | Financial services | 1996 |
| Freshkicks AS | Wholesale & retail | 2026 |
| Friis Laukas AS | Real estate | 2003 |
| Frink AB | Administrative & support | 2023 |
| Friskbris AS | Real estate | 2023 |
| FRK Holding AS | | 2019 |
| Frode Skjevik Holding AS | Professional & scientific | 2012 |
| Frogner Eiendom AS | Real estate | 1999 |
| Frogner Invest AS | Real estate | 1999 |
| Frogner Snøservice AS | Administrative & support | 2023 |
| Frontrunner Consulting AS | Professional & scientific | 2022 |
| Frostad Invest AS | Real estate | 1992 |
| Frosty Sports AS | Wholesale & retail | 2024 |
| Fungo AS | Arts & recreation | 2018 |
| Funksjonell Mat AS | Wholesale & retail | 2007 |
| Furuseth Solkraftverk AS | Energy | 2022 |
| Furuskauen Utbygging AS | | 2007 |
| Fuser Elektro AS | Construction | 2020 |
| Fuser Holding AS | Construction | 2021 |
| Futen AS | Professional & scientific | 2016 |
| Future Golf AS | | 2025 |
| Future Tech AS | Information & communication | 2021 |
| Fysioglede AS | Health & social care | 2016 |