| A. Nisula Oy | Professional & scientific | 2024 |
| AJ-Koneet Oy | Construction | 2009 |
| Aakea Oy | Manufacturing | 2019 |
| Ab Horseman Finlandia Oy | Wholesale & retail | 1987 |
| AegeA Oy | Professional & scientific | 1989 |
| Ajoneuvopalvelu J. Kivelä Oy | Transport & logistics | 2026 |
| As Muovi Oy | Manufacturing | 2000 |
| Aseman Timpuri Oy | Construction | 2019 |
| Asennuspalvelu Vainionpää Oy | Manufacturing | 1991 |
| Askas Oy | Manufacturing | 2021 |
| Avoin yhtiö Etelä-Pohjanmaan Diesel - Syd-Österbottens Diesel | Manufacturing | 1983 |
| Avoin yhtiö Joka Komsi | Agriculture & fishing | 1996 |
| Avoin yhtiö Juttumylly | Arts & recreation | 1993 |
| Avoin yhtiö Teuvan Tavara-Aitta, Uitto & Ojala | Wholesale & retail | 1990 |
| BL-Kiinteistöt, Teuva Oy | Real estate | 2017 |
| Betoniluoma Oy | Manufacturing | 2017 |
| Bikasu Oy | Professional & scientific | 2018 |
| Cebotec Oy | Wholesale & retail | 2016 |
| Co-Tyres Oy | Wholesale & retail | 1991 |
| Corbax Oy | Wholesale & retail | 2025 |
| DIFEC Oy | Administrative & support | 2003 |
| Datasteel Oy | Manufacturing | 1999 |
| Dutch Greenhouse Oy | Hospitality | 2025 |
| E.T. Rahnasto Oy | Real estate | 1978 |
| EP:n Ristikkorakenne Oy | Construction | 2004 |
| ESM Brodesign Oy | Manufacturing | 2022 |
| Elofest Oy | Information & communication | 2010 |
| Elämyspalvelu Marjot Oy | Arts & recreation | 2021 |
| Erlands Agri Oy | Agriculture & fishing | 2024 |
| Foto-Nisula Ky | Professional & scientific | 1990 |
| Fysioterapia Forte Oy | Health & social care | 1988 |
| GH Service Oy | Transport & logistics | 2022 |
| H. Ukkonen Oy | Wholesale & retail | 2006 |
| HIUSTUPA Marita ja Elisa Avoin yhtiö | Other services | 2002 |
| Hammaslaboratorio Jari Halkola Kommandiittiyhtiö | Manufacturing | 1991 |
| Heikki Huhtala Oy | Wholesale & retail | 1997 |
| Heimo Ihalainen Ky | Mining & quarrying | 1991 |
| Hi-Män Oy | Real estate | 2024 |
| Isolakson Oy | Real estate | 2001 |
| Isännöinti Proventia Oy | Real estate | 2021 |
| J.Mikkilä Oy | Construction | 2017 |
| J.Mäntylä Oy | Construction | 2019 |
| Jatloc OY | Construction | 2002 |
| JIJ-Group Oy | Real estate | 2022 |
| JMK Trade Oy | Wholesale & retail | 2020 |
| JMV-Tuote Oy | Manufacturing | 2006 |
| JT-Motors Oy | Wholesale & retail | 2013 |
| JTJ - Solar Oy | Construction | 2016 |
| Jamo Rakennus Oy | Construction | 2014 |
| Juhtafarm Oy | Agriculture & fishing | 2026 |
| Jukka Leppäpuska Oy | Professional & scientific | 1994 |
| Jurvan Taksipalvelu Oy | Transport & logistics | 2019 |
| Jyllinmaa Oy | Real estate | 1998 |
| KR-Tech Oy | Manufacturing | 2016 |
| Kahvila 8-pallo Oy | Hospitality | 2022 |
| Kaluste Marita Oy | Wholesale & retail | 2024 |
| Kaluste Saarela Ky | Other services | 1983 |
| Kantosepät Oy | Administrative & support | 2009 |
| Kasarmin Tila Oy | Agriculture & fishing | 2018 |
| Kevyet Kuljetukset Kuusisto Oy | Transport & logistics | 2007 |
| Kiinteistö Oy Inarin Riitamukka | Real estate | 1993 |
| Kiinteistö Oy Pentti Kallela | Real estate | 1991 |
| Kiinteistö Oy Pirtti | Real estate | 1992 |
| Kiinteistö Oy Purula | Real estate | 2004 |
| Kiinteistö Oy Pyhän Helmi | Real estate | 2008 |
| Kiinteistö Oy Teuvan Kafiaari | Real estate | 2000 |
| Kiinteistöosakeyhtiö Perttulankuja 11 | Real estate | 2024 |
| Kiinteistöyhtiö J. Alanko Oy | Real estate | 2002 |
| Kiuru-Market Ky | Wholesale & retail | 1940 |
| Kone Marttila Oy | Wholesale & retail | 2023 |
| Konetyö Korpela Oy | Construction | 2024 |
| Korpela-Tuote Oy | Manufacturing | 1997 |
| Kortesnevan Vesiosuuskunta | Water & waste | 1985 |
| KoskiRent Group Oy | Financial services | 2024 |
| KoskiRent Oyj | Construction | 2013 |
| KoskiRent Palvelut Oy | Administrative & support | 2024 |
| Koulutus ja konsultointi E&M Nevanperä | Professional & scientific | 2004 |
| Kuljetus Mikko Marttila Oy | Transport & logistics | 2014 |
| Kuljetus Muotio Oy | Transport & logistics | 2016 |
| Kuljetusliike Haapamäki Oy | Transport & logistics | 1991 |
| Käännöspalvelu Mirva Tulisalo Oy | Professional & scientific | 2004 |
| LVI Kaleva Ky | Construction | 1991 |
| LVI-Talo P. Kallela Oy | Construction | 1972 |
| Laurilan Puutarha Oy | Agriculture & fishing | 1996 |
| Leontec Oy | Professional & scientific | 2024 |
| Lounaskahvio Kermanekka Oy | Real estate | 2006 |
| Lukes Oy | Wholesale & retail | 1993 |
| Luovan Saha Oy | Manufacturing | 1994 |
| Länsirannikon Ilmastointi Oy | Construction | 2010 |
| M-Partners Oy Ab | Construction | 2002 |
| MFP Arctic Properties Oy | Hospitality | 2026 |
| MM Rakenne Oy | Construction | 2019 |
| MaViTe Oy | Hospitality | 2018 |
| Maalausliike Mauri Filppula Oy | Construction | 2011 |
| Majoitus Hermanni Oy | Transport & logistics | 2017 |
| Matfors Oy | Real estate | 1991 |
| MaxPro Oy | Transport & logistics | 2022 |
| Mechpart Oy | Manufacturing | 2025 |
| Mellevä Oy | Mining & quarrying | 2013 |
| Metsäkoneurakointi Jani Luhtala Oy | Agriculture & fishing | 2019 |