| Camerawork AS | Administrative & support | 2018 |
| Cannonball Norge Ans | Administrative & support | 1995 |
| Cardone Ans | Wholesale & retail | 2000 |
| CCR Consulting AS | Professional & scientific | 2026 |
| Cenvero AS | Professional & scientific | 2025 |
| Charon Universe AS | Information & communication | 2026 |
| Check Trafikkskole AS | Education | 2022 |
| Chilifox Games AS | Information & communication | 2020 |
| Clei AS | Professional & scientific | 2018 |
| Cohors Leporum AS | Information & communication | 2025 |
| Contreat AS | Construction | 2019 |
| Corator AS | Professional & scientific | 2012 |
| Corundum AS | Financial services | 2012 |
| CT Arita Group AS | Wholesale & retail | 2023 |
| CXS Growth AS | Education | 2016 |
| Dan Invest AS | Construction | 2005 |
| Dargan AS | Manufacturing | 1974 |
| Dargan Invest AS | Manufacturing | 2005 |
| Daxaro IT AS | Information & communication | 2023 |
| Dekal Profilering AS | Professional & scientific | 2018 |
| Di Global AS | Construction | 2023 |
| Din Boligstylist AS | Professional & scientific | 2024 |
| Din Maskinpartner AS | Construction | 2021 |
| Displayhuset AS | Wholesale & retail | 2015 |
| Dokken Drift AS | Administrative & support | 2026 |
| Dolce Vita Fashion AS | Wholesale & retail | 2013 |
| Dramatica Forlag AS | Information & communication | 2020 |
| Drammen Bilberging AS | Transport & logistics | 2024 |
| Drammen Maskin AS | Wholesale & retail | 2021 |
| Drammen Storkjøkkensenter AS | Wholesale & retail | 2004 |
| Drammen Varmeteknikk AS | Wholesale & retail | 2014 |
| Drivstoffappen AS | Information & communication | 2020 |
| Dublon AS | Financial services | 2018 |
| Dvelop AS | Education | 2023 |
| E. Eide Holding AS | Construction | 2021 |
| E. Granheim AS | Financial services | 2011 |
| Ebb Eiendom AS | Real estate | 2022 |
| Ebb Invest AS | Real estate | 2005 |
| Ecb Holding AS | | 2020 |
| Ecohelse AS | Wholesale & retail | 2026 |
| Eian Fritid AS | Wholesale & retail | 2012 |
| Eide Anlegg Og Eiendom AS | Real estate | 2021 |
| Eide Maskin AS | Construction | 2021 |
| Eiker Boligservice AS | Administrative & support | 2014 |
| Eiker Byggpartner Da | Real estate | 2003 |
| Eiker Grafisk Eiendom AS | Real estate | 1996 |
| Eiker Gulv & Malerservice AS | Construction | 2017 |
| Eiker Husbygg AS | Construction | 1993 |
| Eiker Husbygg Eiendom AS | Construction | 2023 |
| Eiker Husbygg Holding AS | Construction | 2006 |
| Eiker Lagerhotell AS | Transport & logistics | 2012 |
| Eiker Maskinservice AS | Manufacturing | 2024 |
| Eiker Rock AS | Arts & recreation | 2016 |
| Eiker Rør Og Totalbad AS | Construction | 2016 |
| Eiker Tungbilskole AS | Education | 2023 |
| Eiker Utvikling AS | Real estate | 2013 |
| Eiker Vekst AS | Health & social care | 1991 |
| Ekj Invest AS | Financial services | 2014 |
| El.Entreprenør Thor R S Andersen AS | Construction | 1996 |
| ELBILLADER1 AS | Wholesale & retail | 2024 |
| Elegance Møbler Og Interiør Ltd Nuf | Wholesale & retail | 2006 |
| Elses Transport AS | Transport & logistics | 2024 |
| Eltavler AS | Manufacturing | 2013 |
| Emil Gundersen Holding AS | Health & social care | 2021 |
| Emkrima Kompetanse AS | Construction | 2022 |
| Engtech A/S | Wholesale & retail | 1984 |
| Eoo AS | Professional & scientific | 2022 |
| Eplehagan Barnehage SA | Education | 1999 |
| Erty AS | Professional & scientific | 2020 |
| Espen Aamot Holding AS | | 2025 |
| Espen Andre Hansen | Construction | 2013 |
| Eta-Eiendom AS | Hospitality | 2023 |
| Euro Vision Network AS | Information & communication | 1993 |
| Evenmore AS | Wholesale & retail | 2021 |
| Expert Bygg Og Renovering AS | Construction | 2024 |
| Fagtakst AS | Information & communication | 2024 |
| Fakta Assuranse Helge Johansson & Thorleif Snyen Ans | | 1996 |
| Fallo Invest AS | | 2019 |
| Famle Holding AS | | 2018 |
| Few Dollars More SA | Arts & recreation | 2015 |
| FHR Capital AS | Real estate | 2025 |
| Fido Invest AS | Manufacturing | 2018 |
| Finn Haugen Elektroentreprenør AS | Construction | 1996 |
| Fiol Invest & Equity AS | | 2025 |
| Firing Holding AS | | 2025 |
| Fiskeruta AS | Wholesale & retail | 2023 |
| Fiskeruta Holding AS | Wholesale & retail | 2022 |
| Five Elektro AS | Construction | 1994 |
| Five Holding AS | Construction | 2005 |
| Fjellheimveien 2 AS | Real estate | 2011 |
| Fjelltunet Kikut AS | Real estate | 2018 |
| Fjerdingen 17 AS | Real estate | 2019 |
| Flisleggern Da | Construction | 1992 |
| Flyt Digital AS | Information & communication | 2012 |
| Foods AS | Real estate | 2006 |
| Fordring Invest I AS | | 2024 |
| Forretningsgården Smedvigen AS | Real estate | 1987 |
| Fossheim Bil AS | Wholesale & retail | 2008 |
| Fossum Bygg AS | Construction | 2004 |
| Fossum Sten & Hage AS | Real estate | 2010 |