| Ekebergveien 243 AS | Real estate | 1989 |
| Ekebergveien 252/252B AS | Real estate | 2022 |
| Ekebergveien Tannklinikk Tannlegene Skaanes Og Wisløff Ans | Health & social care | 1993 |
| Ekebjur Invest AS | | 2023 |
| Ekebo AS | Real estate | 2000 |
| Ekeborg Holding AS | | 2025 |
| Ekeko Sport Limited | Manufacturing | 2019 |
| Ekely Invest AS | Professional & scientific | 2018 |
| Ekely Park AS | Real estate | 2006 |
| Ekelyveien 4 AS | Real estate | 2018 |
| Ekelyveien AS | Real estate | 2009 |
| Ekem Finans AS | Financial services | 2005 |
| Ekenberg Consulting AS | | 2024 |
| Ekern Geo Consulting AS | Professional & scientific | 2016 |
| Ekernet AS | | 2025 |
| Ekervegen 5 Eiendom AS | Real estate | 2014 |
| Ekeskjær AS | Real estate | 1982 |
| Ekh Invest AS | Real estate | 2020 |
| Ekhb Invest AS | | 2023 |
| Ekholding AS | | 2019 |
| Ekholdt Huynh AS | Information & communication | 2018 |
| Ekholm Holding AS | | 2026 |
| Ekholtveien 2 AS | Real estate | 2018 |
| Eki AS | | 2020 |
| Ekko Advokatfirma AS | Professional & scientific | 2023 |
| Ekko Design AS | Professional & scientific | 2019 |
| Ekko Eiendomsdrift Ltd Nuf | Real estate | 2023 |
| Ekko Forever AS | Professional & scientific | 2015 |
| Ekko Musikkinstitutt AS | Education | 2024 |
| Ekko Smil Tannklinikk AS | Health & social care | 2024 |
| Ekko String Quartet Da | Arts & recreation | 2021 |
| Ekkokammeret Da | Information & communication | 2024 |
| Ekkots AS | Real estate | 1997 |
| Ekkuity AS | Real estate | 2008 |
| Ekling AS | Professional & scientific | 2018 |
| Eklund Bygg Og Akustikk Da | Construction | 2001 |
| Eklunds Livs Aksjeselskap | Administrative & support | 2021 |
| Ekma AS | Professional & scientific | 2017 |
| Ekman Holding AS | Financial services | 2018 |
| Eknos Hage AS | Financial services | 2008 |
| Eko Maler AS | Construction | 2014 |
| Eko Renhold AS | Administrative & support | 2022 |
| Ekoh Holding AS | Real estate | 2005 |
| Ekonomernas Hus I Sverige AB Nuf | Professional & scientific | 2012 |
| Ekopost AS | Information & communication | 2011 |
| Ekorail AS | Manufacturing | 2024 |
| Ekorn AS | | 2021 |
| Ekorn Renhold AS | Administrative & support | 2023 |
| Ekornspett AS | Information & communication | 2021 |
| Ekornveien Utvikling AS | Real estate | 2026 |
| Ekotens AS | Professional & scientific | 2017 |
| Ekr AS | Education | 2015 |
| Ekra AS | Real estate | 2006 |
| Ekraveien Eiendom AS | Real estate | 2020 |
| Ekre Gabrielsen AS | | 2023 |
| Ekrogn Tak Og Membran AS | Construction | 2018 |
| Eks AS | Real estate | 2005 |
| Eks Serv AS | Health & social care | 2013 |
| Eksaa Holding AS | | 2021 |
| Eksagt AS | Professional & scientific | 2025 |
| Eksakt Bygg AS | Construction | 2010 |
| Eksakt Eiendom & Invest AS | Construction | 2006 |
| Eksakt Hi-Fi AS | Wholesale & retail | 2019 |
| Eksellent Consulting AS | Professional & scientific | 2025 |
| Ekskurs AS | Health & social care | 2022 |
| Eksos Pluss AS | Other services | 2014 |
| Ekspert Elektro AS | Construction | 2025 |
| Ekspert Holding AS | Professional & scientific | 2005 |
| Ekspert Regnskap AS | Professional & scientific | 2000 |
| Eksplorering AS | Professional & scientific | 2013 |
| Ekspress Bank Nuf | Financial services | 2007 |
| Ekstern Styreleder AS | Professional & scientific | 2022 |
| Ekstra AS | | 2026 |
| Ekstrem Design AS | Professional & scientific | 2021 |
| Ekt Rideskole Og Husdyrpark AS | Education | 2004 |
| Ektank Norge AS | Transport & logistics | 1999 |
| Ekte AS | Professional & scientific | 2022 |
| Ekte Company AS | Professional & scientific | 2018 |
| Ekte Kjøtt AS | Wholesale & retail | 2015 |
| Ekte Norge AS | Wholesale & retail | 2026 |
| Ekte Penger AS | Wholesale & retail | 2021 |
| Ekte Records Ans | Information & communication | 2025 |
| Ekte Sjokolade AS | Real estate | 2009 |
| Ekteon AS | Construction | 2026 |
| Ektorb AS | Real estate | 2016 |
| Ektvedt Holding AS | Financial services | 2017 |
| Ekurs Norge AS | Education | 2020 |
| Ekurutluk AS | Financial services | 2005 |
| Ekvi AS | Information & communication | 2022 |
| Ekvi Holding AS | Information & communication | 2022 |
| EKVI10 AS | Real estate | 2021 |
| Ekviti AS | Real estate | 1987 |
| Ekvix AS | Real estate | 2023 |
| El & Rør Service AS | Construction | 2016 |
| El Advisor AS | | 2020 |
| El Alliansen AS | Construction | 2022 |
| El Bidco AS | | 2025 |
| El Burro AS | Hospitality | 2014 |
| El Capitan AS | Real estate | 2021 |
| El Effekt AS | Construction | 1995 |