| ACS Team Oy | Hospitality | 2020 |
| AJ PT Infra Oy | Administrative & support | 2025 |
| Apkh OY | Other services | 2023 |
| Ab Kaetkae Initiatives Ltd Oy | Administrative & support | 2024 |
| AmandaK Ky | Administrative & support | 2021 |
| Antti Taskinen Oy | Construction | 2022 |
| Audiovis Oy | Arts & recreation | 1981 |
| Enterprise Relationship Management Equity Oy | Professional & scientific | 1997 |
| Ergo Unit Oy | Manufacturing | 1989 |
| Fritz Company Oy | Financial services | 2025 |
| Goods Network Oy | Wholesale & retail | 2017 |
| H & P Yhtiöt Oy | Construction | 2006 |
| Hapanta.com Oy | Manufacturing | 2020 |
| Hintikan vesiosuuskunta | Water & waste | 2000 |
| Hirvensalmen Energia Oy | Energy | 2002 |
| Hirvensalmen Fysioterapia Oy | Health & social care | 1993 |
| Hirvensalmen Herkku Ky | Hospitality | 1992 |
| Hirvensalmen Huoltamo Ky | Wholesale & retail | 1989 |
| Hirvensalmen Kala Oy | Agriculture & fishing | 2020 |
| Hirvensalmen Vesi Oy | Water & waste | 2002 |
| Hirvensalmen kiinteistöhuolto Oy | Administrative & support | 2021 |
| Hirvensalmen kiinteistönhoito Oy | Administrative & support | 2020 |
| JTJ-Team Oy | Construction | 2013 |
| JV Clothing Oy | Wholesale & retail | 2004 |
| Jari T. Liukkonen Oy | Construction | 2007 |
| Järvi-Suomen Huoneistomarkkinointi Oy | Real estate | 1994 |
| Järvi-Suomen Kalatuote Oy | Manufacturing | 1996 |
| KR-Kuljetus Oy | Transport & logistics | 1996 |
| KalaPuula Oy | Agriculture & fishing | 2010 |
| Kantonen Group Oy | Other services | 2020 |
| Kauppahuone Lampila Osakeyhtiö | Wholesale & retail | 1998 |
| Kiinteistö Oy Hirvensalmen Junnankuja | Real estate | 1976 |
| Kiinteistö Oy Hirvensalmen Keskusrinne | Real estate | 1971 |
| Kiinteistö Oy Hirvensalmen Koivulehto | Real estate | 1978 |
| Kiinteistö Oy Hirvensalmen Satama | Wholesale & retail | 2004 |
| Kiinteistö Oy Pöyryntupa | Real estate | 1988 |
| Kiinteistöosakeyhtiö Tammilehto Oy | Real estate | 2003 |
| Kissakoski Ky | Manufacturing | 1990 |
| Konetyö Arpiainen Ky | Construction | 1996 |
| Koneurakointi Ripatti Oy | Agriculture & fishing | 2013 |
| Kotkanlento Oy | Professional & scientific | 2021 |
| Kustannus Oy Lampila | Information & communication | 1998 |
| LK Lehtikuusi Oy | Wholesale & retail | 2009 |
| Lampuula Oy | Professional & scientific | 1994 |
| Liukkosen Kala Oy | Manufacturing | 2018 |
| MJO Capital Oy | Financial services | 2025 |
| MUS Marketing Oy | Administrative & support | 2019 |
| Markkinointitoimisto Viesti Perille Oy | Information & communication | 2011 |
| MiMiEd Oy | Hospitality | 2019 |
| Mikkelin Hammaskarhut Avoin yhtiö | Health & social care | 2010 |
| Miwp Oy | Professional & scientific | 2026 |
| Monitoimipalvelut MTP Oy | Professional & scientific | 2024 |
| NWLarch OÜ, sivuliike Suomessa | Wholesale & retail | 2019 |
| Oravalan Oy | Construction | 2013 |
| PSO Oy | Financial services | 2022 |
| Paikallislehti Hirvensalmelainen Oy | Information & communication | 2011 |
| Pitopalvelu Pitoaitta Oy | Hospitality | 2017 |
| Pure Dried Nature Oy | Wholesale & retail | 2025 |
| R&K-Rakentajat Oy | Construction | 2015 |
| Rakennusliike Reijo Juhani Itkonen Ky | Construction | 1986 |
| Ravintola Kissakoski Oy | Hospitality | 2005 |
| Rent Hirvensalmi Oy | Other services | 2020 |
| Saimaan Kiinteistöhuolto Oy | Administrative & support | 2015 |
| Satulinna Resort Oy | Hospitality | 2015 |
| Satupaja Ky | Health & social care | 2007 |
| Sejon Baari Oy | Hospitality | 2021 |
| Superot Oy | Wholesale & retail | 2010 |
| Sähköasennukset Marko Rouhiainen Oy | Construction | 2018 |
| TT Fishing Oy | Agriculture & fishing | 2024 |
| Tutonor OY | Administrative & support | 2009 |
| TaTe Sijoitus Oy | Financial services | 2023 |
| Talenter Oy | Professional & scientific | 2021 |
| Transport S.Manninen Oy | Transport & logistics | 2012 |
| V. Pöyry Ky | Construction | 1988 |
| VP consulting oy | Professional & scientific | 2025 |
| Vartetto Oy | Hospitality | 2012 |
| Velska Ky | Other services | 1991 |
| Vientikone Oy | Wholesale & retail | 1996 |
| Vilkonharjun Sora Oy | Mining & quarrying | 1994 |
| Villa Uutela Oy | Agriculture & fishing | 1996 |
| Vintinniemen satama osuuskunta | Transport & logistics | 1998 |
| Visamix Oy | Administrative & support | 1985 |