| 101 Ideaa Oy | Professional & scientific | 2001 |
| A2K Kiinteistöt Oy | Real estate | 2021 |
| AST-Palvelu Oy | Health & social care | 2024 |
| ActiveSoft Oy | Information & communication | 2000 |
| Actiw Oy | Manufacturing | 2008 |
| AidKollegium Oy | Administrative & support | 2018 |
| Aro Nordic Oy | Construction | 2026 |
| Bemux Oy | Wholesale & retail | 2022 |
| Bestrends Oy | Wholesale & retail | 2023 |
| CaLeVe Oy | Hospitality | 2021 |
| DEKO MedTech Oy | Manufacturing | 1993 |
| Edustus Pieviläinen Oy | Wholesale & retail | 1982 |
| Esapekka Lappi Racing Team Oy | Arts & recreation | 2018 |
| HJP-Kaluste Ky | Manufacturing | 1985 |
| Hespakka Oy | Professional & scientific | 1990 |
| IceDiamond Oy | Administrative & support | 2008 |
| JP-Control Oy | Manufacturing | 2022 |
| JTN-Mekan Oy | Manufacturing | 2008 |
| Jaimai Oy | Information & communication | 2023 |
| Jaloste-Hotti Oy | Agriculture & fishing | 1989 |
| Janne ja Antti Piispanen Ky | Transport & logistics | 1988 |
| KWC Northern Europe Oy | Wholesale & retail | 2024 |
| Kalamania Oy | Manufacturing | 2017 |
| Karinvest Oy | Financial services | 2024 |
| Kate Tukiainen Ky | Construction | 2006 |
| Kateworks Oy | Construction | 2018 |
| Keissi Invest Oy | Financial services | 2024 |
| Kelloliike Shemeikka Ky | Wholesale & retail | 1991 |
| Kiinteistö Oy Kuopion Hepomäki | Real estate | 2023 |
| Kiinteistö Oy Naarajärven Autotalo | Real estate | 1985 |
| Kiinteistö Oy Pieksämäen Tukikohta | Real estate | 2003 |
| Kiinteistö Oy Siilinranta | Real estate | 1981 |
| Kiinteistö Oy Sompionkulma | Real estate | 1973 |
| Koneyhtymä Karjalainen Oy | Agriculture & fishing | 2010 |
| Kuljetus J&M Väisänen Ky | Construction | 2007 |
| Kuljetus Kokkonen Oy | Transport & logistics | 1999 |
| Kuljetus Paavo Häkkinen Oy | Transport & logistics | 1995 |
| L&E Future Oy | Financial services | 2024 |
| LN-Neliöt Oy | Real estate | 2026 |
| Lipa-Betoni Oy | Manufacturing | 1976 |
| Lomaduo's Oy | Hospitality | 2022 |
| Luki-invest Oy | Financial services | 2024 |
| Lumoinen Oy | Other services | 2016 |
| Maa-Aitta Oy | Wholesale & retail | 2020 |
| Mahla Forest Oy | Manufacturing | 2017 |
| Metallix Oy | Manufacturing | 1993 |
| Minnan hyvinvointipalvelut Oy | Health & social care | 2025 |
| Moilas Oy | Manufacturing | 2005 |
| Naaran Rakennus OY | Construction | 2005 |
| Naarajärven Monipalvelu Ky | Hospitality | 1990 |
| Naarajärven Palvelukoti Oy | Health & social care | 1998 |
| Naarajärven Ravirata Oy | Arts & recreation | 2016 |
| Naaran Kuljetushuolto Oy | Other services | 2008 |
| Naaran Putkityö Oy | Construction | 2025 |
| Nahkaluola avoin yhtiö | Manufacturing | 1984 |
| Niskatalo Oy | Manufacturing | 1996 |
| Nitoja Station Oy | Hospitality | 2024 |
| Nuuvinmäki avoin yhtiö | Agriculture & fishing | 2013 |
| Nykänen Works Oy | Agriculture & fishing | 2024 |
| Nykänen Yhtiöt Oy | Manufacturing | 2003 |
| Oksanen Yhtiöt Oy | Administrative & support | 2024 |
| Ovaskooli Oy | Wholesale & retail | 2004 |
| PK-Kuva Oy | Arts & recreation | 1988 |
| PMK Asennus Oy | Manufacturing | 2025 |
| PMK Construct Oy | Construction | 2022 |
| PMK-Tekniikka Oy | Administrative & support | 1992 |
| Puukala Ky | Manufacturing | 2016 |
| Parvitec Oy | Manufacturing | 2020 |
| Pasi Boman Oy | Transport & logistics | 1997 |
| Perhekoti Kivitasku Oy | Health & social care | 2026 |
| Perhekoti Wäisänhovi Oy | Health & social care | 2005 |
| Piako Oy | Manufacturing | 2010 |
| Pieksämäen Karvaiset tassut Oy | Arts & recreation | 2024 |
| Pieksämäen Marjan Kukka Ky | Wholesale & retail | 1993 |
| Pieksämäen Rautarakenne Oy | Manufacturing | 2004 |
| Pieksämäen Taksipalvelu Oy | Transport & logistics | 2015 |
| Pieksämäen Touhutassut Oy | Arts & recreation | 2021 |
| Pieksän Hammas Oy | Financial services | 1983 |
| Pieksänlinna Oy | Real estate | 1989 |
| Pro-Tot Oy | Manufacturing | 2011 |
| Prohelmee Oy | Health & social care | 2022 |
| Pure Smilent Oy | Health & social care | 2024 |
| RD Roof Dealers Oy | Construction | 1996 |
| Rabuka Oy | Wholesale & retail | 2005 |
| Rakennus Pilar Oy | Construction | 2004 |
| Rakennusliike R. Lempinen Oy | Construction | 1989 |
| Rakennusliike U. Lipsanen Oy | Construction | 1967 |
| RataCom Oy | Construction | 2017 |
| Reino & Henrik Kosonen Oy | Professional & scientific | 1997 |
| ST-Sähkö S. Tyrväinen kommandiittiyhtiö | Construction | 1999 |
| SULO Sijoitus Oy | Real estate | 2019 |
| Sanimari Oy | Wholesale & retail | 1996 |
| Savelakoti Oy | Health & social care | 2016 |
| Sisä-Savon Kuljetus Ky | Transport & logistics | 1981 |
| Soraliike Hänninen Oy | Mining & quarrying | 1982 |
| SukitusApu Oy | Professional & scientific | 2025 |
| Suomen Muuvipalvelu Oy | Transport & logistics | 2019 |
| Suomi-Hitsaus Oy | Manufacturing | 2015 |
| TS-Metsä Oy | Agriculture & fishing | 2008 |
| Tarkka Invest Oy | Professional & scientific | 2022 |