| A4-Kiinteistöt Oy | Real estate | 2008 |
| Alfakatto Oy | Construction | 2022 |
| Ammatillinen perhekoti Kuusenkerkkä Oy | Health & social care | 2024 |
| Antohaka Oy | Real estate | 1989 |
| Auktori Oy | Professional & scientific | 1987 |
| Cafe Bar Seven Oy | Hospitality | 2014 |
| Ditek Oy | Information & communication | 2019 |
| E. Tukiainen Oy | Wholesale & retail | 1963 |
| EL-TAITO Oy | Professional & scientific | 2012 |
| EPM Team Oy | Administrative & support | 2014 |
| ESG-partners Oy | Administrative & support | 2008 |
| Emmika Oy | Transport & logistics | 2001 |
| Etelä-Savon Kuntokartano Oy | Arts & recreation | 2017 |
| Etelä-Savon Polttoainepalvelu Oy | Wholesale & retail | 1997 |
| F-Safety Oy | Wholesale & retail | 2011 |
| Fysikaalinen hoitolaitos Suomikunto Oy | Health & social care | 1988 |
| Haapa Tilipalvelu Oy | Professional & scientific | 2020 |
| Halkotek Oy | Agriculture & fishing | 2022 |
| Hannun Liikennekoulu Ky | Education | 1994 |
| Hietaniemi Holidays Oy | Hospitality | 2019 |
| Hit n' Help Oy | Wholesale & retail | 2009 |
| I & P Ihalainen | Wholesale & retail | 1992 |
| Insinööritoimisto Jaakonsaari Oy | Wholesale & retail | 1996 |
| JAJ Sijoitus ja konsultointi Oy | Professional & scientific | 2024 |
| JM Motopalvelu Oy | Agriculture & fishing | 2013 |
| JP Infra Oy | Construction | 2015 |
| JP Ratarak Oy | Construction | 2025 |
| Jamikat Oy | Other services | 2014 |
| Joonas Orava Oy | Construction | 2020 |
| Jounin Lihapuoti Ky | Wholesale & retail | 1999 |
| Jyrki Tammi - Ado Ky | Wholesale & retail | 1991 |
| Järvi-Savon Hirsirakenne Oy | Construction | 2003 |
| Järvi-Suomen Nuohous Oy | Administrative & support | 2025 |
| Korpi Investment OY | Administrative & support | 2016 |
| KOY Linnantie 2 | Real estate | 2022 |
| Kaarina Kyyrö Ky | Wholesale & retail | 1986 |
| Karhu & Kump | Wholesale & retail | 1990 |
| Kattovahti Oy | Construction | 2021 |
| Kauria & Kauria Oy | Professional & scientific | 2012 |
| Kebab-pizzeria Serif avoin yhtiö | Hospitality | 2011 |
| Kiinteistö Oy Brahentie 34 | Real estate | 2023 |
| Kiinteistö Oy Katajamäentie 32-34 | Real estate | 2012 |
| Kiinteistö Oy Porrassuo | Real estate | 2025 |
| Kiinteistö Oy Ristiinan Aallonranta | Real estate | 1992 |
| Kiinteistövirna Oy | Real estate | 2001 |
| Koppelo Media Oy | Arts & recreation | 2025 |
| Korhosen Metalli Oy | Manufacturing | 1987 |
| Korpivara Oy | Financial services | 2025 |
| Kuljetus R. Immonen Oy | Transport & logistics | 2022 |
| Kuljetus Rummukainen Oy | Transport & logistics | 2011 |
| Kuljetus T. & P. Immonen Oy | Transport & logistics | 1999 |
| Kuljetusliike Venäläinen Oy | Transport & logistics | 2024 |
| Kulkuri Kulunvalvonta Oy | Information & communication | 2020 |
| Kuoriko Oy | Manufacturing | 1992 |
| Kurvilan Koneasema Oy | Agriculture & fishing | 2011 |
| Kurvilan Maatalous Oy | Agriculture & fishing | 2019 |
| Logpine LG Oy | Wholesale & retail | 1998 |
| Loimiluo Oy | Wholesale & retail | 2018 |
| Löppönen Original Oy | Professional & scientific | 1989 |
| M & S Sälke Ky | Transport & logistics | 1982 |
| Mankara Invest OY | Wholesale & retail | 2007 |
| MH Yhtiöt Oy | Hospitality | 2020 |
| MR-Huoltopalvelut Oy | Administrative & support | 2021 |
| Macedel Oy | Construction | 2002 |
| Madevie Oy | Arts & recreation | 1998 |
| Majatalo Ristina Oy | Wholesale & retail | 2003 |
| Makija Invest Oy | Other services | 2009 |
| Markon Maalaus Oy | Construction | 2022 |
| Mattila&Alanen | Arts & recreation | 2020 |
| Metsälinja Oy | Agriculture & fishing | 2013 |
| Mikkelin Asbestityö Ky | Water & waste | 2004 |
| Mikkelin Fysioteam OMT avoin yhtiö | Health & social care | 2003 |
| Mikkelin Haavapalvelu Ag Oy | Health & social care | 2019 |
| Mikkelin Musatalo Ky | Wholesale & retail | 1991 |
| Mirave Oy | Wholesale & retail | 1992 |
| Myrtilli Oy | Wholesale & retail | 2010 |
| Mäntyharjun Kuljettajakoulutus Ky | Education | 1983 |
| NL Works Oy | Other services | 2025 |
| Oceanview Consulting Oy | Professional & scientific | 2024 |
| Ole VIP Oy | Transport & logistics | 2023 |
| P.A. Mavrick Ky | Transport & logistics | 1999 |
| Parturi-Kampaamo Ahotie Oy | Other services | 2008 |
| Patentoitu Aita Oy | Other services | 2025 |
| Pelimanni Pub Ky | Hospitality | 2006 |
| Pioneeriveljet Oy | Real estate | 2015 |
| Ristina Factory Outlet OY | Wholesale & retail | 2009 |
| RT-Nuohous Avoin yhtiö | Administrative & support | 2006 |
| RTH Huolto ja Asennus Oy | Manufacturing | 2011 |
| Rakennuspalvelu Timpurit Tiihonen Ky | Construction | 2009 |
| Ravintola Laiturinlamppu Oy | Hospitality | 2016 |
| Riihelän kuljetus Ky | Transport & logistics | 2010 |
| Ripesti Oy | Hospitality | 1996 |
| Risteam Oy | Manufacturing | 2005 |
| Ristiina Group Invest Oy (RGI) | Administrative & support | 2016 |
| Ristiina-Holiday Invest Oy | Wholesale & retail | 1994 |
| Ristiinan Ammattirealisointi Oy | Wholesale & retail | 1993 |
| Ristiinan Autotyö avoin yhtiö | Other services | 2023 |
| Ristiinan Metsäpalvelu Oy | Agriculture & fishing | 2008 |
| Ristiinan Oikosulku Oy | Construction | 2018 |
| Ristiinan Porakaivo Oy | Construction | 2007 |