| Erfaringer AS | Other services | 2024 |
| Ergon AS | Real estate | 1985 |
| Eric & Sean Invest AS | Real estate | 2008 |
| Erik Skjerven Trevareagentur AS | Wholesale & retail | 2005 |
| Eriksen&Erlandsen AS | Other services | 2015 |
| Erp Consult AS | Information & communication | 2005 |
| Erstad Holding AS | Financial services | 2017 |
| Erto Consult AS | Professional & scientific | 2005 |
| Es Maskinservice AS | Manufacturing | 2026 |
| Escape Hønefoss AS | Arts & recreation | 2023 |
| Eskelund Holding AS | Professional & scientific | 2022 |
| Espen Og Ole Langdalen Ans | Real estate | 2004 |
| Et Hei-Sveis AS | Other services | 2012 |
| Eurobil Invest AS | Wholesale & retail | 2026 |
| Eurobygg Andenes AS | Real estate | 2016 |
| Eurobygg Bamble AS | Real estate | 2011 |
| Eurobygg Bjugn AS | Real estate | 2018 |
| Eurobygg Dale AS | Real estate | 2009 |
| Eurobygg Eiendom AS | Real estate | 2006 |
| Eurobygg Flisa AS | Real estate | 2007 |
| Eurobygg Fosnavåg AS | Real estate | 2018 |
| Eurobygg Grong AS | Real estate | 2013 |
| Eurobygg Larvik Nord AS | Real estate | 1996 |
| Eurobygg Mysen AS | Real estate | 2005 |
| Eurobygg Stokmarknes AS | Real estate | 2016 |
| Eurobygg Årdal AS | Construction | 2016 |
| Eurobygg Ørnes AS | Real estate | 2016 |
| Eurodel AS | Wholesale & retail | 2012 |
| European Studios AS | Information & communication | 2011 |
| Evity Helse AS | Health & social care | 2023 |
| Evje Handelsbygg AS | Real estate | 2018 |
| Exactitude AS | Professional & scientific | 2023 |
| Exotic Motors AS | Wholesale & retail | 2025 |
| Exotisk Frukt AS | Wholesale & retail | 2019 |
| Eøa Invest AS | Financial services | 2017 |
| F.D Holding AS | | 2026 |
| Fagernes Butikkeiendom AS | Real estate | 1995 |
| Fagerås Invest AS | Real estate | 2017 |
| Famell Holding AS | Professional & scientific | 2021 |
| Farhadi Holding AS | Real estate | 2017 |
| Faso Holding AS | Financial services | 2014 |
| FBC Eiendom AS | Wholesale & retail | 2012 |
| FCL AS | Real estate | 2016 |
| Fecadu Eiendom AS | Real estate | 2026 |
| Fecadu Invest AS | Administrative & support | 2005 |
| Feelgood Hønefoss AS | Arts & recreation | 2017 |
| Feenstra Holding AS | | 2021 |
| Femina Dame Og Herrefrisør AS | Other services | 2014 |
| Femina Eiendom AS | Real estate | 2008 |
| Femtiprosent AS | Wholesale & retail | 2022 |
| FH Regnskap AS | Professional & scientific | 2026 |
| Fifty Fifty AS | Wholesale & retail | 2017 |
| Fikerud Eiendom AS | Real estate | 2022 |
| Fikerud Holding AS | Real estate | 2017 |
| Finnsnes Handelseiendom AS | Real estate | 2017 |
| First Properties AS | Real estate | 2007 |
| FJ Horeca AS | Hospitality | 2018 |
| Fjeld Kapital AS | Information & communication | 1999 |
| Fjeldheim Eiendom AS | Real estate | 2004 |
| Fjeldseterveien SA | Real estate | 1960 |
| Fjelldal Bilutleie AS | Administrative & support | 1994 |
| Fjelldal Holding AS | Administrative & support | 2015 |
| Fjellteigen AS | Real estate | 2005 |
| Flate AS | Construction | 2026 |
| Flattum Legesenter Da | Health & social care | 1999 |
| Flattum Tannlegesenter AS | Health & social care | 2024 |
| Flaumr AS | | 2020 |
| Flisa Butikkeiendom AS | Real estate | 2008 |
| Flytten AS | Transport & logistics | 2021 |
| FMV 73 AS | Real estate | 2019 |
| Focus Print AS | Manufacturing | 1989 |
| Fokus Holding AS | Professional & scientific | 2003 |
| Fokus Rådgivning AS | Professional & scientific | 2007 |
| Follum Bilutleie AS | Administrative & support | 2023 |
| Follummoveien 30 AS | Real estate | 2023 |
| Follummoveien 80 AS | Real estate | 2011 |
| Forelens AS | Information & communication | 2023 |
| Forfatterkollegiet Forlag SA | Information & communication | 2024 |
| Forma Eiendomsutvikling AS | Real estate | 2022 |
| Forretningsgården Vikersund AS | Real estate | 1995 |
| Forsikringshuset Ringerike AS | Financial services | 2013 |
| Foss & Harper AS | Wholesale & retail | 2024 |
| Fossen Bar & Pub AS | Hospitality | 2017 |
| Fossen Barbershop AS | Other services | 2025 |
| Fossen Eiendom AS | Real estate | 2001 |
| Fossen Friluft AS | Wholesale & retail | 2012 |
| Fossen Kraft AS | Energy | 2005 |
| Fossen Matglede AS | Hospitality | 2023 |
| Fossen Utvikling AS | Real estate | 2005 |
| Fossveien 5 AS | Real estate | 1993 |
| Fossveien 7-9 AS | Real estate | 2014 |
| Fotoper AS | Professional & scientific | 2016 |
| Fram Handel AS | | 2023 |
| Fredheim Dekksenter AS | Wholesale & retail | 2023 |
| Fredrik Holter Holding AS | | 2022 |
| Fremgaard Da | Real estate | 2005 |
| Frisøren 1 AS | Other services | 2019 |
| Frits Rail AS | Agriculture & fishing | 2019 |
| Froland Butikkeiendom AS | Real estate | 2019 |
| Front Holding Velo AS | Real estate | 2020 |