| 1177 Terhi Sotka Oy | Wholesale & retail | 2014 |
| 1341 Heidi Kaupinsalo Oy | Wholesale & retail | 2015 |
| 3T-Company Oy | Real estate | 1995 |
| 53 Rakennuspalvelut Oy | Construction | 2025 |
| A. Paana Oy | Professional & scientific | 2024 |
| AHS Projects Oy | Professional & scientific | 2021 |
| AJL Automaatio Oy | Construction | 2013 |
| AJL Yhtiöt Oy | Real estate | 2022 |
| AL & MA Trans Oy | Transport & logistics | 1999 |
| APT-Enertel Oy | Professional & scientific | 1992 |
| Aaltonen Holding Oy | Financial services | 2020 |
| Activa Invest Oy | Financial services | 2007 |
| Adventura Oy | Arts & recreation | 2022 |
| Agaricus Oy | Agriculture & fishing | 1997 |
| Agrimex Oy | Wholesale & retail | 1992 |
| Ahoska Catering Oy | Hospitality | 1985 |
| Alecars Oy | Wholesale & retail | 2025 |
| AmiPro Service Oy | Information & communication | 2011 |
| An Transport & Logistics Oy | Transport & logistics | 2011 |
| Aneks Oy | Construction | 2022 |
| Anten tila Oy | Agriculture & fishing | 2008 |
| Arktos Capital Oy | Real estate | 2025 |
| Arokoivun Invataksit Oy | Transport & logistics | 2008 |
| Artex Oy | Manufacturing | 2022 |
| Aske Oy | Construction | 2020 |
| Astila Ky | Construction | 1977 |
| Atlas-Fysio Oy | Health & social care | 2005 |
| Aulin Kiinteistöt Oy | Real estate | 2018 |
| Autohuovi Oy | Real estate | 2012 |
| Autokorikorjaamo Salminen Ky | Other services | 1982 |
| Automaalaamo Hannu Heinonen Oy | Other services | 2003 |
| Automaalaamo ja Väriliike Ari Varjonen Värix Ky | Other services | 1987 |
| Avagro Oy | Manufacturing | 1990 |
| Avoin yhtiö Laitilan Louhenlinna | Hospitality | 1995 |
| BB Centadem Oy | Other services | 2023 |
| BilisKellari Kommandiittiyhtiö | Arts & recreation | 2003 |
| Bloodstained Metal Community Osk | Arts & recreation | 2024 |
| Cawi Oy | Manufacturing | 2019 |
| Cerutum Oy | Real estate | 2019 |
| Codebox Oy | Information & communication | 1992 |
| Coniel Oy | Information & communication | 2014 |
| Cool & Steel, Finland Oy | Construction | 2006 |
| Daaler Oy | Wholesale & retail | 2003 |
| Dajersan Oy | Information & communication | 2019 |
| Dewaco Oy | Manufacturing | 2008 |
| Diego Marine Oy | Wholesale & retail | 1999 |
| Dönmez Keidas Oy | Hospitality | 2020 |
| E-Kaara Oy | Wholesale & retail | 2020 |
| E-Kone Oy | Wholesale & retail | 2021 |
| EEC International Oy | Wholesale & retail | 2019 |
| EH Works Oy | Construction | 2024 |
| EMJ Pipeworks Oy | Construction | 2018 |
| Easy Power Oy | Administrative & support | 2021 |
| Ellipse Group Oy | Professional & scientific | 2010 |
| Energia- ja KierrätysParkki Oy | Water & waste | 2013 |
| Envirec Finland Oy | Administrative & support | 1992 |
| Eristys Jalonen Oy | Construction | 2016 |
| Ernon Kauppa Oy | Wholesale & retail | 2019 |
| Etelä-Suomen Energiakuljetus Oy | Transport & logistics | 2005 |
| Etelä-Suomen Energiamurskaus Oy | Transport & logistics | 1998 |
| Eutimes Oy | Manufacturing | 1996 |
| Everbreeze Media Oy | Arts & recreation | 2022 |
| FINNBRODE Ky | Manufacturing | 2002 |
| FT Progressus Oy | Professional & scientific | 2014 |
| Fertilex Oy | Manufacturing | 2018 |
| FinTimber Oy | Wholesale & retail | 2017 |
| Finn Lamex Safety Glass Oy | Manufacturing | 2016 |
| Fire Foods Oy | Hospitality | 2016 |
| Fysikaalinen Hoitolaitos Taina Kaila-Vuorio Oy | Health & social care | 2016 |
| Gallinax Oy | Agriculture & fishing | 2013 |
| HMH-Poraus Oy | Mining & quarrying | 2016 |
| HMU-Tekniikka Oy | Professional & scientific | 1999 |
| HR-Rakenne Oy | Construction | 2015 |
| HT-Eristys Ky | Construction | 2005 |
| HTG-Asfaltti Oy | Construction | 1995 |
| HTJ Kaivuu ja Kuljetus Oy | Construction | 2009 |
| Hakitite Oy | Agriculture & fishing | 2007 |
| Hallist Partners Oy | Construction | 2013 |
| Hannun Hankinta Oy | Manufacturing | 1993 |
| HartsaHelppi Oy | Transport & logistics | 2021 |
| Heikkilä Corporation Oy | Arts & recreation | 2018 |
| Helistölä Invest Oy | Professional & scientific | 2021 |
| Helistölä Logistics Oy | Transport & logistics | 2007 |
| Helistölä Yhtiöt Oy | Water & waste | 2025 |
| Helmikangas Oy | Wholesale & retail | 2010 |
| Hemmo Tähtinen Oy | Transport & logistics | 1997 |
| Henkilöstötoimisto Maanantai Oy | Administrative & support | 2018 |
| Hiekka-Laitila Oy | Transport & logistics | 1992 |
| Hilakarit Oy | Construction | 1992 |
| Hilax Oy | Wholesale & retail | 2002 |
| Hinaus Vallamo Oy | Transport & logistics | 2004 |
| Hissimarin Oy | Construction | 1997 |
| Hope Holding Oy | Professional & scientific | 2021 |
| Huolto- ja metallirakenne Heinonen Ky | Manufacturing | 2001 |
| Husto Invest Oy | Real estate | 1982 |
| Hutinmäen Kone Oy | Wholesale & retail | 2015 |
| I&T Musiikki Oy | Education | 2019 |
| Ibo Kukonkulma Oy | Hospitality | 2024 |
| Ihanmäki Invest Oy | Financial services | 2019 |
| InSa Korkmaz Oy | Hospitality | 2020 |