| AI-Juurespakkaus Ky | Manufacturing | 1983 |
| Ala-Kantti Logistics Oy | Transport & logistics | 2024 |
| BioHehku Oy | Wholesale & retail | 2026 |
| Bonepower Oy | Wholesale & retail | 2007 |
| Clean Energy Oy Finland | Manufacturing | 1999 |
| E. ja O. Myllymäki Oy | Transport & logistics | 1985 |
| Etelä-Pohjanmaan Kuljetus Ky | Transport & logistics | 2008 |
| Eurogaia Oy | Wholesale & retail | 1993 |
| Fematec Oy | Manufacturing | 2007 |
| Gpm Finland Oy | Manufacturing | 2011 |
| Hakasen Maatila Oy | Agriculture & fishing | 2025 |
| Harri Heinola Oy | Mining & quarrying | 2001 |
| Heinolan Auto ja Traktori Oy | Wholesale & retail | 1977 |
| Hitsaustyö Kuusniemi Ky | Manufacturing | 1992 |
| Hongon Tupa Ky | Hospitality | 2014 |
| Honka Holding Oy | Professional & scientific | 2007 |
| Honka-Center Oy | Hospitality | 2000 |
| Honka-Rinta Oy | Water & waste | 2016 |
| HonkaEnergy Oy | Energy | 2011 |
| Honkajoen Hautauspalvelu Avoin Yhtiö | Other services | 1999 |
| Honkajoen Metalli ja Koneistus Ky | Manufacturing | 1984 |
| Honkajoen Osuuspankki | Financial services | 1911 |
| Honkajoki Oy | Manufacturing | 1964 |
| Honkajoki Works Oy | Manufacturing | 2000 |
| Honkaporsas Oy | Agriculture & fishing | 2002 |
| Honkatarhat Oy | Agriculture & fishing | 1985 |
| Honkatrading Oy | Wholesale & retail | 1990 |
| Honkatuulet Oy | Energy | 2011 |
| Insinööripalvelut Valkama Oy | Professional & scientific | 2026 |
| Isokaski Oy | Wholesale & retail | 2002 |
| JL Markkinointi Oy | Wholesale & retail | 2025 |
| Jussilan tila Oy | Agriculture & fishing | 2002 |
| KKK-Vihannes Oy | Agriculture & fishing | 1987 |
| Kallioniemi Consulting Oy | Professional & scientific | 2022 |
| Kankaanpääinvest Oy | Real estate | 1988 |
| Kantonen Minerals Oy | Mining & quarrying | 2013 |
| Katkontien Maatalouskone Oy | Administrative & support | 1998 |
| Keijo Ala-Kantti Oy | Transport & logistics | 1984 |
| Kiinteistö HAntti Oy | Real estate | 2021 |
| Kiinteistö Oy Fintower | Real estate | 1997 |
| Kiinteistö Oy Kivipohja | Real estate | 1976 |
| Kiinteistö Oy Lauhanlinna | Real estate | 1999 |
| Kiinteistö Oy Männiköntie | Real estate | 2023 |
| Konda Capital Oy | Real estate | 2007 |
| Koneurakointi Ari ja Arto Mattila | Mining & quarrying | 1987 |
| Konewest oy | Agriculture & fishing | 2024 |
| Kuljetus & Konetyö Kulmala Ky | Construction | 2016 |
| Kuljetus Haapalehto Oy | Construction | 2022 |
| Lauhatuotanto Oy | Hospitality | 1999 |
| Lämpö Rautjärvi Oy | Energy | 2006 |
| Metallituote Olli-Pekka Takala Ky | Manufacturing | 1989 |
| Nalli ja Napsaus Oy | Construction | 2024 |
| Opo's Sound Oy | Wholesale & retail | 1994 |
| Oy Tialfa Ab | Other services | 1990 |
| Patokosken Urakointi Oy | Mining & quarrying | 1994 |
| Pirjon Pakari Satakunta Oy | Hospitality | 2018 |
| Pukara Oy | Agriculture & fishing | 2021 |
| Pukarankylän Energia Oy | Energy | 2022 |
| Puoti Lastukas avoin yhtiö | Wholesale & retail | 1994 |
| Puutyö K. Viljanmaa Oy | Manufacturing | 1987 |
| RakEte Oy | Construction | 2017 |
| Reino Kurumaa Oy | Transport & logistics | 2000 |
| Rifaalti Oy | Professional & scientific | 1992 |
| S & J Kiviluoma avoin yhtiö | Wholesale & retail | 2023 |
| SP Sitomo Oy | Construction | 1993 |
| Suotek Oy | Construction | 2009 |
| Sähkö HEJO Oy | Construction | 2026 |
| Sähkötassu Oy | Construction | 1997 |
| TEKJA Oy | Financial services | 2023 |
| Take Kone Oy | Wholesale & retail | 2008 |
| Talliviita Oy | Real estate | 2025 |
| TaneRent Oy | Administrative & support | 2007 |
| Tiustech Oy | Manufacturing | 2018 |
| Urakointi Sivula Oy | Mining & quarrying | 2023 |
| Uusipaasto Oy | Mining & quarrying | 2017 |
| V ja P Asukas, avoin yhtiö | Construction | 1987 |
| VI-Pakkaus Oy | Administrative & support | 2022 |
| VTJ Group Oy | Manufacturing | 2024 |
| Veljekset Vanhahonko Oy | Construction | 2006 |
| Ylituomi Ky | Agriculture & fishing | 2009 |