| Erik Wold AS | Professional & scientific | 2014 |
| Eriksen & Jensen AS | Construction | 1986 |
| Eriksen Eiendom AS | Real estate | 1972 |
| Eriksen Equity AS | Professional & scientific | 2024 |
| Eriksen Solutions AS | Professional & scientific | 2024 |
| Eriksen Takst AS | Real estate | 2025 |
| Eriksen Utleie AS | Real estate | 2009 |
| Eriksrud AS | | 2021 |
| Erikstølen AS | Professional & scientific | 2012 |
| Erinion AS | Professional & scientific | 2024 |
| Erione Transport AS | Transport & logistics | 2026 |
| Eriro Holding AS | | 2025 |
| Eris Consulting AS | Professional & scientific | 2022 |
| Eritec AS | Information & communication | 2017 |
| Eritreum AS | Information & communication | 2014 |
| Erjo Holding AS | | 2024 |
| Erk Invest AS | | 2020 |
| Erke AS | Financial services | 2016 |
| Erke Holding AS | Health & social care | 2025 |
| Erkeduodji AS | Professional & scientific | 2026 |
| Erketunet Gardsbakeri Oslo AS | Hospitality | 2024 |
| Erkkila AS | Administrative & support | 2015 |
| Erl Holding AS | | 2024 |
| Erla Eiendom AS | Real estate | 1992 |
| Erla Eiendom Holding AS | Real estate | 1991 |
| Erla Felleskost AS | Real estate | 2018 |
| Erla Prosjekt 1 AS | Real estate | 2023 |
| Erlaco AS | Professional & scientific | 2011 |
| Erland Morud Eiendomsforvaltning AS | Real estate | 1960 |
| Erlandsen AS | Health & social care | 2006 |
| Erlandsen Eiendomsforvaltning AS | Real estate | 2000 |
| Erlandsson Tubular Management AS | Professional & scientific | 2018 |
| Erlend Høiby Invest AS | | 2019 |
| Erlend Invest AS | | 2020 |
| Erlend Kaurstad Morthen Invest AS | | 2022 |
| Erlend Mekker Nice, AS | Manufacturing | 2023 |
| Erlend Ropstad AS | Arts & recreation | 2020 |
| Erlend Rydning AS | Real estate | 2015 |
| Erlend Sande AS | Financial services | 2005 |
| Erlend Sevaldson Moe Holding AS | | 2025 |
| Erlend Stokke AS | Information & communication | 2019 |
| Erlend Vik Holding AS | | 2022 |
| Erler Teaterkompani SA | Arts & recreation | 2012 |
| Erlevo AS | Real estate | 1997 |
| Erlik Kaffe AS | Hospitality | 2016 |
| Erling Holdco AS | Information & communication | 2022 |
| Erling Invest AS | | 2025 |
| Erling Jensen Consulting AS | Professional & scientific | 2017 |
| Erling Neby AS | Wholesale & retail | 2005 |
| Erling Skjalgssonsgate 19 AS | Real estate | 2004 |
| Erling Strand Invest AS | Financial services | 1970 |
| Erlingsdotter Invest AS | Professional & scientific | 2026 |
| Erlingsen Foto & Film AS | Professional & scientific | 2023 |
| Erlo AS | | 2021 |
| Erm Eiendom AS | Real estate | 2017 |
| Erm Invest AS | Professional & scientific | 2005 |
| Ermilay Norge Da | Wholesale & retail | 1996 |
| Ermo AS | Financial services | 2013 |
| Ermoco AS | Construction | 1983 |
| Ermou AS | | 2026 |
| Ermy Consulting AS | Professional & scientific | 2013 |
| Ernest Drake AS | | 2024 |
| Ernika Holding AS | Real estate | 2026 |
| Ernst & Young Advokatfirma AS | Professional & scientific | 2002 |
| Ernst & Young AS | Professional & scientific | 1996 |
| Ernst & Young Compliance Services AS | Professional & scientific | 1988 |
| Ernst & Young Group Limited (NZ) | Professional & scientific | 2016 |
| Ernst & Young LLP (Canada) | Professional & scientific | 2016 |
| Ernst & Young LLP (India) | Professional & scientific | 2016 |
| Ernst & Young LLP (Nederland) | Professional & scientific | 2016 |
| Ernst & Young S.R.O. (Tsjekkia) | Professional & scientific | 2016 |
| Ernst & Young Services Limited (UK) | Professional & scientific | 2016 |
| Ernst & Young Tax AS | Professional & scientific | 2023 |
| Ernusa 04 Holding Limited | | 2022 |
| Ernusa 04 Limited | Wholesale & retail | 2021 |
| Ero Holding AS | Wholesale & retail | 2017 |
| Ero Invest AS | Financial services | 2014 |
| Eroed & Partners AS | Information & communication | 2015 |
| Eroll S Holding AS | | 2024 |
| Eroo AS | Information & communication | 2023 |
| Eros Holding AS | | 2020 |
| Eros Invest AS | Real estate | 2019 |
| Erp Advisor AS | Education | 2006 |
| Erp Development AS | Information & communication | 2012 |
| Erp Invest AS | | 2024 |
| Erpkonsult AS | Information & communication | 2019 |
| Err.No AS | Information & communication | 2012 |
| Erremulig AS | Professional & scientific | 2019 |
| Error: Undefined Reference AS | Financial services | 2018 |
| Error:Ops AS | Information & communication | 2024 |
| Ers Capital AS | | 2020 |
| Ersa Ma 11 AS | Real estate | 2020 |
| Erstatning.Com AS | | 2015 |
| Ert AS | Financial services | 2008 |
| Ertesuppehue AS | Arts & recreation | 2016 |
| Ertom Eiendom AS | Real estate | 2024 |
| Ertur Nuf | Construction | 2019 |
| Erupt AS | | 2018 |
| Ervik Gruppen AS | | 2022 |
| Ervik Invest AS | Financial services | 2016 |