| A. K. Mäkelä Oy | Transport & logistics | 1992 |
| Appelberg & Soidinaho | Wholesale & retail | 2011 |
| Atmeka Oy | Professional & scientific | 2025 |
| Avun Paikka - Heidin ja Henrin Hieronta | Health & social care | 2012 |
| BIGROCK Oy | Agriculture & fishing | 2013 |
| Botnia Energia Oy | Water & waste | 2007 |
| Crossgames Oy | Arts & recreation | 2007 |
| Etelä-Pohjanmaan Kirjakauppa Oy | Wholesale & retail | 1947 |
| Etelä-Pohjanmaan purku-urakointi Oy | Construction | 2020 |
| Evolvify Oy | Professional & scientific | 2024 |
| H. Kenkkilä Oy | Construction | 2024 |
| HENUA Organics Oy | Wholesale & retail | 2017 |
| Heikki Ijas Oy | Real estate | 2007 |
| Hertta Invest Oy | Financial services | 2020 |
| Huolto ja asennus MeTammelat Oy | Manufacturing | 2014 |
| Ilmajoen Makkaramestarit Oy | Manufacturing | 1999 |
| J. Lauri Oy | Manufacturing | 2023 |
| JT-Hautamäki Oy | Construction | 2021 |
| JanTuuk Group Oy | Wholesale & retail | 2010 |
| Jusami Invest Oy | Financial services | 2024 |
| KM-Tynjälä Ky | Construction | 1986 |
| KONEURAKOINTI S. ERKKONEN avoin yhtiö | Construction | 2012 |
| Kiinteistö Oy Ketale | Real estate | 1988 |
| Kiinteistö Oy Sudenmäki | Real estate | 2024 |
| Kiinteistö Oy Syrkoh | Construction | 2011 |
| Kiinteistö Oy Syrkoh 2 | Real estate | 2022 |
| KoPu Trade Oy | Wholesale & retail | 2019 |
| Kolmas Yhteinen Ky | Professional & scientific | 2005 |
| KouTo Rakennus Oy | Construction | 2020 |
| Kuljetusliike Saarenpää Ky | Transport & logistics | 1985 |
| Lakeuden Etappi Oy | Water & waste | 1997 |
| Lakeuden Metallikierrätys Oy | Water & waste | 2012 |
| Maanrakennus Tynjälä Oy | Construction | 2013 |
| Maansiirto Veljekset Rinta Oy | Construction | 2006 |
| Mariamäki Oy | Transport & logistics | 1996 |
| Origo Kiinteistöt Oy | Financial services | 2020 |
| Origo invest oy | Financial services | 2013 |
| Osuuskunta Informaatiokirjakauppa | Administrative & support | 1974 |
| Oy Adler Ab | Transport & logistics | 1976 |
| P. Leppälä Oy | Agriculture & fishing | 1984 |
| Pinoso Oy | Real estate | 2024 |
| Pohojalaanen Oy | Construction | 2024 |
| Pöytälaakson Kuljetuspalvelu Oy | Transport & logistics | 2012 |
| Rakennuspalvelu Yli-Renko & Rintanen Ky | Construction | 1984 |
| Revisol Civitas Oy | Professional & scientific | 2022 |
| Revisol Logistic Oy | Transport & logistics | 2023 |
| Revisol Oy | Water & waste | 1980 |
| River Aviation Oy | Administrative & support | 2006 |
| RoBotnia Oy | Manufacturing | 2026 |
| Seinäjoen Hyötyneliöt Oy | Real estate | 1993 |
| Seinäjoen Lentoasema Oy | Transport & logistics | 2016 |
| Sinvest Oy | Financial services | 2020 |
| Sipiläinen Motorsport Oy | Other services | 2025 |
| Soulait ky | Health & social care | 2004 |
| Suomitaksi Oy | Transport & logistics | 2014 |
| TR-Machinery Oy | Construction | 2019 |
| TRM-Trucks Oy | Transport & logistics | 2014 |
| Talotekniikka Mäkynen Oy | Construction | 2023 |
| Tapahtuma Lakeus Oy | Arts & recreation | 2022 |
| Trukkihuolto veljekset Haapala Oy | Other services | 2009 |
| Tuominen Invest Oy | Real estate | 2023 |
| Vaihtix Oy | Wholesale & retail | 2020 |
| Villa Sisarpirtti Oy | Real estate | 2001 |
| Vähämaa Group Oy | Real estate | 2012 |
| WestMilk Oy | Agriculture & fishing | 2018 |