| Driv AS | Wholesale & retail | 2017 |
| Driv Energi AS | Wholesale & retail | 2007 |
| Driv Hydrogen AS | Manufacturing | 2023 |
| Driv Service AS | Wholesale & retail | 2016 |
| E-Wheels 2 AS | Manufacturing | 2022 |
| Eba Entrepenør AS | Construction | 2025 |
| Edelmark AS | Professional & scientific | 2020 |
| Edware AS | Education | 2011 |
| Edware International AS | Education | 2022 |
| Ee-Regnskapshuset AS | Professional & scientific | 2010 |
| Egerø Eiendom AS | Real estate | 1990 |
| Egil Øen AS | Real estate | 1990 |
| Eikenøtt AS | Real estate | 2023 |
| Eiker Begravelsesbyrå AS | Other services | 2014 |
| Eiker Bladet AS | Information & communication | 1998 |
| Eiker Blikk AS | Construction | 2009 |
| Eiker Bolig & Eiendom AS | Construction | 2010 |
| Eiker Bolig Og Næring AS | Real estate | 2005 |
| Eiker Byggtjenester AS | Construction | 2012 |
| Eiker Drift AS | Agriculture & fishing | 2015 |
| Eiker Eiendom AS | Construction | 2004 |
| Eiker Eiendomsutvikling AS | Real estate | 1992 |
| Eiker Energi AS | Energy | 2020 |
| Eiker Fibernett AS | Information & communication | 2003 |
| Eiker Gårdsysteri AS | Manufacturing | 2002 |
| Eiker Hagesenter AS | Wholesale & retail | 1990 |
| Eiker Helsekost AS | Wholesale & retail | 2014 |
| Eiker Holding AS | Real estate | 2005 |
| Eiker Hus Og Hytte AS | Construction | 1997 |
| Eiker Hyttebygg AS | | 2009 |
| Eiker Hårstudio AS | Other services | 2013 |
| Eiker IT AS | Information & communication | 2004 |
| Eiker Kompetanse Da | Education | 2026 |
| Eiker Kraftproduksjon AS | Energy | 1997 |
| Eiker Landskap AS | Administrative & support | 2024 |
| Eiker Lavpris AS | Wholesale & retail | 2000 |
| Eiker Lås-Service AS | Wholesale & retail | 1998 |
| Eiker Motorshop AS | Wholesale & retail | 1982 |
| Eiker Omsorgsbygg AS | Real estate | 2024 |
| Eiker Regnskapsdata AS | Professional & scientific | 2018 |
| Eiker Senter Kiosken AS | Wholesale & retail | 2020 |
| Eiker Sport AS | Wholesale & retail | 1998 |
| Eiker Strøm AS | Energy | 2008 |
| Eiker Trebåtbyggeri Ans | Manufacturing | 1997 |
| Eiker Trykkeri AS | Manufacturing | 1994 |
| Eikerbud AS | Transport & logistics | 1990 |
| Eivind Moen AS | Construction | 2005 |
| Eiyara & Co AS | Health & social care | 2022 |
| Eker Dampsag & Høvleri AS | Wholesale & retail | 2013 |
| Eker Dampsag Eiendom AS | Wholesale & retail | 1919 |
| Eker Eiendom AS | Real estate | 2015 |
| Eko 12 AS | Real estate | 2026 |
| Ekommunikasjon Og Rådgivning AS | Information & communication | 2015 |
| Elektroveien 7 Holding AS | Real estate | 2019 |
| Elektroveien 8 AS | Real estate | 2017 |
| Elektroveien 9 AS | Real estate | 2009 |
| Elektroveien Holding AS | Real estate | 2014 |
| Element Og Spesialtransport AS | Transport & logistics | 1996 |
| Elena Holding AS | Real estate | 2013 |
| Elmers Dag Johannessen Da | Wholesale & retail | 2023 |
| Elvenett AS | Energy | 1997 |
| Em Handel AS | Wholesale & retail | 1989 |
| Emilie Beauty AS | Other services | 2024 |
| Emmas Negledesign AS | Other services | 2020 |
| Emserv AS | Manufacturing | 2013 |
| Emtian AS | Professional & scientific | 2019 |
| Endson Bygg Og Eiendom AS | Construction | 1989 |
| Enel Invest AS | | 2026 |
| Enter Eiendom AS | Real estate | 2022 |
| Epleveien 23 AS | Real estate | 2018 |
| Erik Borgersen Holding AS | | 2005 |
| Est-Holding AS | | 2021 |
| Et Works AS | Information & communication | 2013 |
| Euro-Blikk & Tak AS | Construction | 1991 |
| Fabian Amundsen AS | | 2011 |
| Factor Consulting AS | Information & communication | 2022 |
| Fagerheim Rør AS | Construction | 2024 |
| Fasadeconsult Aluminium AS | Manufacturing | 1998 |
| Fastlege Bjørkøyli AS | Health & social care | 2025 |
| Fasttekk AS | Construction | 2016 |
| Feelgood Hokksund AS | Arts & recreation | 2017 |
| Fekja Invest AS | Financial services | 2005 |
| Feltspatveien 5 AS | Real estate | 2019 |
| Ferden AS | Real estate | 2007 |
| Ferrometall Invest AS | Real estate | 2015 |
| Fha Capital Holding AS | | 2021 |
| Fifty Daydreams AS | Financial services | 2023 |
| Fighter Pilot Mindset AS | Professional & scientific | 2024 |
| Finexa IT Solutions AS | Information & communication | 2022 |
| Fintech Systems Norway AS | Information & communication | 2021 |
| Fiskum Tunet AS | Real estate | 2026 |
| Fixit Vedlikehold AS | Construction | 2026 |
| Fjeld Utheim Holding AS | | 2020 |
| Fjellfly AS | Professional & scientific | 1984 |
| Fjellro Eiendom AS | Real estate | 2025 |
| Fjerdingstad Eiendom AS | Manufacturing | 1978 |
| Fjerdingstad Holding AS | Manufacturing | 2009 |
| Flaget AS | Construction | 2009 |
| Flaget Gruppen AS | Real estate | 2012 |
| Flaget Holding AS | Construction | 2006 |