| Espoon Siltakadun asunnot 1 Oy | Financial services | 2025 |
| Espoon Suunnittelutekniikka Oy | Professional & scientific | 1985 |
| Espoon Takuurakenne Oy | Professional & scientific | 1989 |
| Espoon Talotyö Oy | Construction | 2021 |
| Espoon Talousremontti oy | Construction | 1986 |
| Espoon Valakujan asunnot 1 Oy | Financial services | 2025 |
| Espoon Viherpihan Kodit Oy | Financial services | 2019 |
| Espoon itäsaariston vesiosuuskunta | Water & waste | 2021 |
| Espoon matkatoimisto Oy | Transport & logistics | 2005 |
| Espoonlahden Putki Oy | Construction | 1989 |
| Espoontorin Pysäköintitalo Oy | Transport & logistics | 1987 |
| Espresso House Finland Oy | Hospitality | 2014 |
| Espresso Oy | Financial services | 1989 |
| Esprit de Corp. Danmark A/S, filial i Finland | Wholesale & retail | 1994 |
| EssCap Ab | Financial services | 2020 |
| Essaim Apps Oy | Information & communication | 2002 |
| Esse-X Oy | Real estate | 1994 |
| Essecraft Oy | Professional & scientific | 1995 |
| Essedel Capital Partners Oy | Financial services | 2008 |
| Essedel Oy | Financial services | 2024 |
| Essentia Solutions Oy | Information & communication | 2011 |
| Essentia Ventures Oy | Financial services | 2021 |
| Essentra Components AB, filial i Finland | Wholesale & retail | 2013 |
| Essi Bly Oy | Professional & scientific | 2023 |
| Essi Unkuri Media Oy | Arts & recreation | 2025 |
| Essi Wahlman Jewelry Oy | Wholesale & retail | 2009 |
| Essico Oy | Financial services | 2017 |
| Essiivi Oy | Professional & scientific | 1987 |
| Est Line Oy | Agriculture & fishing | 1989 |
| Estacon Oy | Real estate | 2003 |
| Estado Oy | Professional & scientific | 2018 |
| Estate Capital Oy | Professional & scientific | 2023 |
| Estate One Oy | Real estate | 2023 |
| Estate Six Oy | Real estate | 2025 |
| Estate Three Oy | Real estate | 2024 |
| Estate Two Oy | Real estate | 2023 |
| Estel Oda Oy | Other services | 2020 |
| Estelle Helsinki Oy | Professional & scientific | 2006 |
| Estellus Oy | Financial services | 1987 |
| Ester Cosmetics Oy | Wholesale & retail | 2020 |
| Ester Trade Oy | Professional & scientific | 2024 |
| Ester's Grocery Kallio Oy | Hospitality | 2026 |
| Ester's Grocery Oy | Hospitality | 2023 |
| Estforest Oy | Agriculture & fishing | 2023 |
| Esther Studio Oy | Professional & scientific | 2023 |
| Esthetic Clinic Sari Säily Oy | Other services | 2019 |
| Esthetic Medicals Import oy | Wholesale & retail | 2020 |
| Estia palvelut Oy | Wholesale & retail | 2025 |
| Estica-yhtiöt Oy | Professional & scientific | 1995 |
| EstiloNorte Oy | Transport & logistics | 2026 |
| Estimandi oy | Professional & scientific | 2025 |
| Estimatum Oy | Professional & scientific | 1992 |
| Estlander & Partners Ab | Financial services | 2000 |
| Estlander & Partners Investment Ab | Financial services | 2015 |
| Estonte Investo Oy | Financial services | 2019 |
| Estram Oy | Construction | 2016 |
| Estrelle Oy | Professional & scientific | 2013 |
| Et May Oy | Professional & scientific | 2017 |
| Etalon Oy | Health & social care | 2021 |
| Etana Editions Oy | Information & communication | 2014 |
| Etco Oy | Professional & scientific | 2017 |
| Etelä Savon Perinnetervaus Oy Ab | Construction | 2021 |
| Etelä-Helsingin Arvopaperikauppa Oy | Financial services | 1985 |
| Etelä-Helsingin Habita Oy | Real estate | 1999 |
| Etelä-Helsingin Kiinteistönvälitys Oy | Professional & scientific | 2025 |
| Etelä-Helsingin Lakiasiaintoimisto Oy | Professional & scientific | 2023 |
| Etelä-Hermannin Pysäköinti Oy | Transport & logistics | 2006 |
| Etelä-Hämeen Sato Oy | Construction | 1990 |
| Etelä-Pohjanmaan Laatupäivystys Oy | Health & social care | 2020 |
| Etelä-Savon Mielenterveys Oy | Health & social care | 2004 |
| Etelä-Suomen Arkistointipalvelu Oy | Administrative & support | 2019 |
| Etelä-Suomen Ilmastointi Oy | Construction | 2004 |
| Etelä-Suomen Julkisivupalvelu Oy | Construction | 1994 |
| Etelä-Suomen K.A.L. Rakennus Oy | Professional & scientific | 1998 |
| Etelä-Suomen Kiinteistöallianssi Oy | Construction | 1998 |
| Etelä-Suomen Kirjanpitotoimisto Oy | Professional & scientific | 2012 |
| Etelä-Suomen Kylmähuolto Oy | Construction | 2007 |
| Etelä-Suomen Metsäkonekonsultit E.S.M. Oy | Professional & scientific | 1994 |
| Etelä-Suomen Mökkitalkkarit Oy | Administrative & support | 2007 |
| Etelä-Suomen Parketti Oy | Construction | 2018 |
| Etelä-Suomen Peltitukku Oy | Construction | 2023 |
| Etelä-Suomen Pesuexpertit Oy | Administrative & support | 1998 |
| Etelä-Suomen Puunkorjuu Oy | Agriculture & fishing | 2008 |
| Etelä-Suomen Rakennustaito Oy | Construction | 2007 |
| Etelä-Suomen Talousala Oy | Financial services | 1997 |
| Etelä-Suomen Teollisuusrakenne Oy | Professional & scientific | 2008 |
| Etelä-Suomen Tuoretawara Oy | Wholesale & retail | 2015 |
| Etelä-Suomen Vahinkosaneeraus & Remonttipalvelu Oy | Professional & scientific | 2020 |
| Etelä-Suomen satamapalvelu Oy | Transport & logistics | 2018 |
| Etelä-Suomen urakka Oy | Construction | 2022 |
| Etelä-Säviä Ky | Real estate | 1993 |
| Etelä-suomen raksamies OY | Construction | 2021 |
| Eteläesplanadi 12 HoldCo Ky | Real estate | 2019 |
| Etelän Datacenter Oy | Information & communication | 2025 |
| Etelän Helf&Humble Oy | Other services | 2020 |
| Etelän Kirjanpitotalo Oy | Professional & scientific | 1995 |
| Etelän Luomu-Osuuskunta Elo | Wholesale & retail | 1996 |
| Etelän Negomex Oy | Construction | 2020 |
| Etelän Pesu Oy | Administrative & support | 2008 |
| Etelän Raken & Taa Oy | Construction | 2006 |