| A. ja H. Jukarainen Ky | Agriculture & fishing | 1989 |
| AJ Salo Oy | Construction | 2017 |
| AT Rengas ja Autohuolto Oy | Wholesale & retail | 2025 |
| Aitoilo Oy | Health & social care | 2022 |
| Apoterveys Oy | Wholesale & retail | 2024 |
| Asennuspalvelu P. Halonen Oy | Wholesale & retail | 2011 |
| Aution Marjatila Oy | Agriculture & fishing | 2009 |
| Auto- ja Rengashuolto U. ja P. Nuutinen | Wholesale & retail | 1985 |
| Auto-Huttunen Oy | Administrative & support | 1981 |
| Automaalaus ja Kolarikorjaus Halttunen & Ursin | Other services | 1989 |
| B.I.G. Productions Ky | Information & communication | 2012 |
| Berliet Oy | Hospitality | 1998 |
| Castmet Oy | Construction | 1988 |
| Con Ring Oy | Financial services | 1997 |
| Consulting Suihkonen Oy | Professional & scientific | 2019 |
| Cooper Invest Company Oy | Financial services | 2005 |
| DaGama OY | Real estate | 2010 |
| Diamond-Tools Pekka Voutilainen Oy | Wholesale & retail | 1996 |
| E&E Konepalvelu Oy | Construction | 2026 |
| EL X Oy | Construction | 2016 |
| EP Steel & Machine Oy | Manufacturing | 2025 |
| ESE FOREST avoin yhtiö | Agriculture & fishing | 2014 |
| ESPEL-Metsä Oy | Agriculture & fishing | 2021 |
| Ecomedic Oy | Wholesale & retail | 1995 |
| Eero Sivonen Ky | Wholesale & retail | 2006 |
| Eiran Kertan Oy | Agriculture & fishing | 2010 |
| Elsor Oy | Manufacturing | 2001 |
| Eners Oy | Information & communication | 2013 |
| Ep Pienkaivuu Oy | Construction | 2019 |
| Erana Oy | Real estate | 1980 |
| Etelä-Savon Sora Oy | Mining & quarrying | 2000 |
| Eterneco Ky | Wholesale & retail | 2018 |
| Etu-Ruhanen Oy | Wholesale & retail | 2023 |
| FRE Invest Oy | Financial services | 2022 |
| Farmarinverkkokauppa.fi Oy | Wholesale & retail | 2020 |
| Felando Ky | Other services | 2019 |
| Fiksu Apu Oy | Professional & scientific | 2007 |
| Fimetra Oy | Transport & logistics | 2018 |
| Finnsäiliö Oy Suonenjoki | Professional & scientific | 1995 |
| Fire and Rescue Innovation Finland FRIF Oy | Professional & scientific | 2019 |
| FredSe Oy | Manufacturing | 2019 |
| Gravita ky | Information & communication | 2002 |
| HHJ-Betonilattiat Oy | Construction | 2017 |
| HR-Machine Oy | Wholesale & retail | 2007 |
| Halolanmäen - Rieponlahden Vesiosuuskunta | Water & waste | 1997 |
| Hammaslääkäri Ida Huovinen Oy | Health & social care | 2024 |
| Havil Oy | Construction | 2011 |
| Hektech Oy | Real estate | 2014 |
| Herki Oy | Real estate | 2004 |
| Herralantien Vesihuolto-osuuskunta | Water & waste | 2007 |
| Histamiini Oy | Other services | 2010 |
| Hoitokoti Poppeli Oy | Health & social care | 1998 |
| Hoivakoti Manteli Oy | Health & social care | 1990 |
| Hutnyk marja Oy | Agriculture & fishing | 2021 |
| Hutt Capital Oy | Wholesale & retail | 2020 |
| Hynex Oy | Wholesale & retail | 1997 |
| IP ÄlyAkku Oy | Manufacturing | 2023 |
| Iisteräs Oy | Manufacturing | 2012 |
| Iisveden Metsä Oy | Manufacturing | 1924 |
| JARSA Oy | Construction | 2018 |
| JAS Works Oy | Manufacturing | 2025 |
| JEH Rakennus ja remontointi Oy | Construction | 2020 |
| JH Rakennus ja Remontointi Oy | Construction | 2006 |
| JLNP-tilapalvelut Oy | Arts & recreation | 2014 |
| JM Pipe Welding Oy | Construction | 2011 |
| JP Metsätyö Ky | Agriculture & fishing | 2008 |
| JSJ-Lattiat Oy | Construction | 2008 |
| JTJ Company Oy | Professional & scientific | 2018 |
| Jeveko Oy | Agriculture & fishing | 2022 |
| Joki-Lasi Kommandiittiyhtiö | Construction | 1973 |
| Jokisport Ky Esko Tiirikainen | Wholesale & retail | 1991 |
| Jomida Oy | Real estate | 2019 |
| Juureskukko Oy | Manufacturing | 2020 |
| Jätehuolto Arvo Ylönen Oy | Water & waste | 1999 |
| Jätehuolto Laitinen Oy | Water & waste | 2015 |
| KA Automyynti Oy | Wholesale & retail | 2017 |
| KL Puunkorjuu avoin yhtiö | Agriculture & fishing | 2023 |
| KMM Information Oy | Professional & scientific | 1995 |
| KN Metal & Service Oy | Manufacturing | 2019 |
| Kaijan Siivouspalvelu Oy | Administrative & support | 1989 |
| Kaiut Oy | Manufacturing | 2021 |
| KalFix Oy | Manufacturing | 2003 |
| Kapusja Ky | Manufacturing | 2000 |
| Kaviokoukku Oy | Transport & logistics | 2014 |
| Kehitysyhtiö Savogrow Oy | Administrative & support | 2014 |
| Kelankulman Hoivapalvelut Oy | Health & social care | 2026 |
| Kenkäkauppa Suonenjoki Oy | Wholesale & retail | 2022 |
| Keski Company Oy | Manufacturing | 1948 |
| Keski-Savon Viestintä Oy | Wholesale & retail | 1993 |
| Kiertorauta Oy | Wholesale & retail | 2011 |
| Kiinteistö Osakeyhtiö Poppeli | Real estate | 1999 |
| Kiinteistö Oy Iisvedentie | Real estate | 1999 |
| Kiinteistö Oy Rautalammin Asematalo | Real estate | 2002 |
| Kiinteistö Oy Sinhouse | Real estate | 2003 |
| Kiinteistö Oy Suonenjoen Aarola | Real estate | 1990 |
| Kiinteistö Oy Suonenjoen Tervalankatu 6 | Real estate | 1974 |
| Kiinteistö Oy Suonenjoen Vuokratalot | Real estate | 1981 |
| Kinnulanniemen vesihuolto-osuuskunta | Water & waste | 2005 |
| Kinuskinen Oy | Hospitality | 2025 |
| Kipinän Marjatila Oy | Agriculture & fishing | 2021 |