| Etelän Rakennustekniikka Oy | Construction | 2023 |
| Eteläpohjalainen kasvurahasto Ky | Financial services | 2023 |
| Eteläranta Capital Oy | Professional & scientific | 2008 |
| Eteläviitta 2 Pysäköinti Oy | Real estate | 2022 |
| Etenee Oy | Education | 2025 |
| Eternity in an Hour Oy | Information & communication | 2025 |
| Etevin Group Oy | Information & communication | 2020 |
| Ethereal North Oy | Wholesale & retail | 2025 |
| Ethica Oy | Professional & scientific | 2013 |
| Ethical Slug Oy | Wholesale & retail | 2019 |
| Ethics Agency Oy | Professional & scientific | 2019 |
| Ethos Asunnot Oy | Real estate | 2024 |
| Ethos Capital Oy | Financial services | 2022 |
| Ethos Light Industrial Opportunities I Feeder Ky | Financial services | 2025 |
| Ethos Light Industrial Opportunities I GP Oy | Financial services | 2025 |
| Ethos Light Industrial Opportunities I Holding I GP Oy | Financial services | 2025 |
| Ethos Light Industrial Opportunities I Holding I Ky | Financial services | 2025 |
| Ethos Light Industrial Opportunities I Holding II GP Oy | Financial services | 2025 |
| Ethos Light Industrial Opportunities I Holding II Ky | Financial services | 2025 |
| Ethos Light Industrial Opportunities I Ky | Financial services | 2025 |
| Ethos Light Industrial Strategies I Feeder Ky | Financial services | 2024 |
| Ethos Light Industrial Strategies I GP Oy | Financial services | 2022 |
| Ethos Light Industrial Strategies I Holding I GP Oy | Financial services | 2023 |
| Ethos Light Industrial Strategies I Holding I Ky | Financial services | 2023 |
| Ethos Light Industrial Strategies I Holding II GP Oy | Financial services | 2024 |
| Ethos Light Industrial Strategies I Holding II Ky | Financial services | 2024 |
| Ethos Light Industrial Strategies I Ky | Financial services | 2023 |
| Ethos Real Estate IV Oy | Real estate | 2025 |
| Ethos Real Estate IX Oy | Real estate | 2025 |
| Ethos Real Estate VI Oy | Real estate | 2025 |
| Ethos Residential Opportunities I Ky | Financial services | 2024 |
| Ethos Residential Strategies I GP Oy | Financial services | 2024 |
| EtiNex Oy | Information & communication | 2022 |
| Etiera Oy | Administrative & support | 2020 |
| Etkm Oy | Professional & scientific | 2020 |
| Etlatieto Oy | Professional & scientific | 1989 |
| Etnin Oy | Construction | 1987 |
| Etola Group Oy | Wholesale & retail | 1974 |
| Etola Kiinteistöt Oy | Real estate | 2010 |
| Etola Oy | Wholesale & retail | 1951 |
| Etola Shops Oy | Wholesale & retail | 2015 |
| Etosis Oy | Information & communication | 2018 |
| Etra Capital Oy | Financial services | 2009 |
| Etra Electronics Oy | Wholesale & retail | 1978 |
| Etra Oy | Wholesale & retail | 1932 |
| Etson Advisory Oy | Professional & scientific | 2023 |
| Etta Viihde Oy | Arts & recreation | 2022 |
| Ettal Oy | Administrative & support | 2007 |
| Ettevõtluse ja Innovatsiooni Sihtasutus, sivuliike Suomessa | Administrative & support | 2022 |
| Ettonet Oy | Wholesale & retail | 2008 |
| Etua Oy | Financial services | 2008 |
| Etukeno Oy | Information & communication | 1988 |
| Etukodit Kymppi Oy | Real estate | 2018 |
| Etukodit Oy | Real estate | 2017 |
| Etupesu Vantaa Oy | Wholesale & retail | 2025 |
| Etupihat Oy | Administrative & support | 1988 |
| Eturivissä Oy | Professional & scientific | 2026 |
| Etuystävä Oy | Arts & recreation | 2016 |
| Eudios Oy, Trauma- ja katastrofipsykologinen keskus | Health & social care | 1995 |
| Euforios Oy | Financial services | 2001 |
| Eugentes Oy | Wholesale & retail | 2008 |
| Eugramen Oy | Professional & scientific | 1996 |
| Eukara Oy | Wholesale & retail | 1989 |
| Eukarya Oy | Financial services | 2022 |
| Euler Hermes SA, Suomen sivuliike | Financial services | 2011 |
| Euler Hermes Service AB, Suomen sivuliike | Administrative & support | 2008 |
| Eulon Oy | Financial services | 2011 |
| Eumar Nordic Oy | Wholesale & retail | 2017 |
| Eurajoki AI Campus Oy | Construction | 2026 |
| Euraria Oy | Wholesale & retail | 1990 |
| Eurasia Innovations Oy | Professional & scientific | 2017 |
| Eurasia Publishing Oy | Information & communication | 2022 |
| Eurea Oy | Professional & scientific | 2021 |
| Eureport Oy | Administrative & support | 2023 |
| Eurimaar Oy | Construction | 2019 |
| Euro Company Oy | Hospitality | 1989 |
| Euro Coop Oy | Transport & logistics | 1997 |
| Euro Counters Oy | Wholesale & retail | 2003 |
| Euro Driver Oy | Education | 1992 |
| Euro Fin Pro Oy | Construction | 2022 |
| Euro Investment Oy | Administrative & support | 2012 |
| Euro Kari Oy | Professional & scientific | 1992 |
| Euro Kauppa Land Oy | Wholesale & retail | 2025 |
| Euro Plastic Oy | Hospitality | 2008 |
| Euro Pool System Finland Oy | Transport & logistics | 2021 |
| Euro Site Services Oy | Administrative & support | 2022 |
| Euro Softwares Finland Oy | Information & communication | 2025 |
| Euro Steam Oy | Other services | 2017 |
| Euro asia international Oy | Wholesale & retail | 2024 |
| Euro-Asia Trade Development Limited EATD Oy | Hospitality | 1993 |
| Euro-Rakennus Oy | Construction | 1989 |
| Euro-Service Oy | Administrative & support | 1979 |
| Euro-Teli Oy | Wholesale & retail | 1993 |
| Euro-ketju Oy | Professional & scientific | 1993 |
| EuroDrilling Oy | Construction | 2018 |
| EuroForce Finland Oy | Information & communication | 2025 |
| EuroJaari Oy | Construction | 2023 |
| EuroPark Finland Oy | Transport & logistics | 1998 |
| EuroTerpene Oy | Manufacturing | 2025 |
| EuroTrust Systems Oy | Information & communication | 2025 |