| Ekstra Kapital AS | | 2019 |
| Elektroide AS | Construction | 1998 |
| Elle Eiendom AS | Real estate | 2023 |
| Elle Future Jumpers AS | Education | 2025 |
| Elle Holding AS | Financial services | 2007 |
| Elle Showjumping AS | Arts & recreation | 2025 |
| Ellen Hodt Invest AS | Financial services | 2014 |
| Elm Invest AS | Financial services | 2005 |
| Elrs Invest AS | | 2021 |
| Em-Invest AS | | 2026 |
| Emi Invest AS | Professional & scientific | 2024 |
| Emperi Tech AS | Information & communication | 2026 |
| Emporiet AS | Wholesale & retail | 2021 |
| En Idè AS | Professional & scientific | 2011 |
| Enate AS | Wholesale & retail | 2014 |
| Enball Og Toball AS | Information & communication | 2020 |
| Encierro Capital AS | | 2007 |
| Enerq Solutions AS | Energy | 2016 |
| Enfini AS | Wholesale & retail | 2016 |
| Enm AS | Wholesale & retail | 2013 |
| Equilibrium Energy AS | Professional & scientific | 2017 |
| Era Store AS | Wholesale & retail | 2026 |
| Ere Invest AS | | 2022 |
| Eriksen Kran AS | Transport & logistics | 1988 |
| Err-Nor AS | | 2018 |
| Eskbakk Holding AS | Real estate | 2017 |
| Esnit.Net AS | Information & communication | 2013 |
| Espely Anlegg Og Utemiljø AS | Administrative & support | 2020 |
| Espely Gartneri AS | Agriculture & fishing | 2020 |
| Espely Hagesenter AS | Wholesale & retail | 2008 |
| Espen Lie Eiendoms Service AS | Administrative & support | 2025 |
| Euroconsult AS | Professional & scientific | 1998 |
| Eva Skogen AS | Arts & recreation | 2012 |
| Eva Tenden AS | Hospitality | 1982 |
| Evoc Holding AS | Real estate | 2015 |
| Evra Holding AS | Financial services | 2012 |
| Extended Play AS | Real estate | 2009 |
| F Støre Holding AS | Professional & scientific | 2018 |
| F.Larsen Holding AS | | 2023 |
| Fagerli Holding AS | Real estate | 2017 |
| Falkanger Advokater AS | Professional & scientific | 2024 |
| Farda AS | | 2023 |
| Faustus AS | | 2019 |
| Femte AS | Real estate | 2026 |
| Festningshotellene AS | Hospitality | 2017 |
| Festningshotellene Event AS | Administrative & support | 2023 |
| Fiin AS | Other services | 2021 |
| Fiin Hudklinikk AS | Other services | 2026 |
| Finansit AS | Information & communication | 2002 |
| Finnøy Osteopati Og Muskelterapi AS | Health & social care | 2019 |
| Fiq AS | Wholesale & retail | 2016 |
| Fiq Holding AS | Wholesale & retail | 2020 |
| Firegate AS | Wholesale & retail | 2023 |
| First Audio AS | Wholesale & retail | 2004 |
| First Partners Holding 4 AS | Real estate | 2005 |
| FJ Investment AS | Financial services | 2007 |
| Fjeldbekk AS | Manufacturing | 2009 |
| Fjellaksel AS | Real estate | 2020 |
| Fjord & Flame Spirits AS | Wholesale & retail | 2026 |
| Flis Og Byggpartner AS | Construction | 2021 |
| Fliser & Miljø AS | Construction | 2024 |
| Flyt Holding AS | Professional & scientific | 2010 |
| FNK AS | | 2023 |
| Folkvang Storstua I Frogn SA | Other services | 1956 |
| Follo Eiendom AS | Real estate | 1988 |
| Follo Eiendomsservice AS | Administrative & support | 2021 |
| Follo Fluidfilm AS | Other services | 2024 |
| Follo Grave Og Hageservice AS | Construction | 2019 |
| Follo Mikrosement AS | Construction | 2026 |
| Follo Overflatebehandling Ans | Manufacturing | 2019 |
| Follo Portservice AS | Wholesale & retail | 2018 |
| Follo Prosjekt AS | Professional & scientific | 1991 |
| Follo Tømrerservice AS | Construction | 2021 |
| Follow Media AS | Professional & scientific | 2025 |
| Folven NO47 AS | Wholesale & retail | 2015 |
| Fonc Eiendom Drøbak AS | Real estate | 2002 |
| Foodbroker AS | Wholesale & retail | 2006 |
| Fordel Da | Administrative & support | 2006 |
| Foremost AS | Wholesale & retail | 2024 |
| Forfour AS | Construction | 2023 |
| Fornes Benserud Invest AS | | 2021 |
| Forward Records Ans | Wholesale & retail | 1997 |
| Fossenakken AS | Professional & scientific | 2020 |
| Fossveien 14 AS | Real estate | 2006 |
| FPN Service AS | Professional & scientific | 2025 |
| Fra Bangkok Til Tokyo AS | Hospitality | 2017 |
| Fram Advokatfirma AS | Professional & scientific | 2013 |
| Frank Eiendom AS | Real estate | 2005 |
| Frank Kristiansen AS | Construction | 2002 |
| Frank Minilager AS | Real estate | 2017 |
| Frank Prosjekt AS | Real estate | 2022 |
| Frank Utvikling AS | Real estate | 2015 |
| Franklincovey Norway AS | Professional & scientific | 2019 |
| Frayne Holding AS | Financial services | 2013 |
| Fredensborg Holding AS | Real estate | 1998 |
| Fredrik Grunde Nielsen AS | Professional & scientific | 2025 |
| Freim AS | Information & communication | 2025 |
| Fremlys AS | Information & communication | 2026 |
| FRH AS | | 2023 |
| Fricon AS | Professional & scientific | 2014 |