| Abundia Oy | Professional & scientific | 2012 |
| Alppis Ky | Hospitality | 1995 |
| Autokorjaamo Sten Oy | Other services | 2023 |
| CreativeKaiku Ky | Professional & scientific | 1999 |
| EVG-rakennus Oy | Construction | 2013 |
| Etelä-Karjalan Eriste Oy | Construction | 2005 |
| Evolase Oy | Manufacturing | 2021 |
| FORinvest Oy | Financial services | 2008 |
| Fronet Oy | Information & communication | 2004 |
| Hiekkapuhallus ja maalaus Velj. Hyvärinen Ky | | 1987 |
| Hormika Ky | Administrative & support | 1995 |
| Imatran Mikropalvelu Ky | Information & communication | 1987 |
| K-Ruokatori Rasila Ky | | 1987 |
| KT kiinteistö- ja korjauspalvelut Oy | Administrative & support | 2026 |
| Karjalan Remonttipurku Oy | Construction | 2023 |
| Karjalan kone ja kaivuu Oy | Administrative & support | 2021 |
| KaruCoat Oy | Manufacturing | 1986 |
| Kryocon Oy | Real estate | 2007 |
| Kuljetus Idman Ky | Transport & logistics | 1989 |
| Kuljetusliike Osmo Kosonen Oy | Transport & logistics | 1995 |
| Kuntoankkuri Oy | Health & social care | 1986 |
| MT3 Trading Oy | Wholesale & retail | 2013 |
| Maalaus ja pintakäsittely Vartiainen Oy | Construction | 2018 |
| Maaseutupuoti Katariinan kahvitupa Oy | Wholesale & retail | 2011 |
| Maatilamatkailu ja Pitopalvelu Hertta Avoin Yhtiö | Hospitality | 2020 |
| Markus Pokela Oy | Wholesale & retail | 2012 |
| MisaMint Consulting Oy | Professional & scientific | 2026 |
| Moniurakointi Tanskanen Oy | Transport & logistics | 2025 |
| Mukava Rillipää Oy | Other services | 2018 |
| Murat Eroglu Avoin Yhtiö | Hospitality | 2009 |
| Northern Key Oy LTD | Professional & scientific | 2005 |
| Oikea Reitti Oy | Arts & recreation | 2011 |
| Oy Woodpel Ltd | Agriculture & fishing | 2009 |
| Pellisen Saha Oy | Manufacturing | 1989 |
| Pikettivuori Oy | Wholesale & retail | 1999 |
| Rakennus-Kurronen Oy | Construction | 1983 |
| Rasiko Oy | Manufacturing | 2013 |
| Rasilan Hiekkapuhallus ja Maalaus Oy | Manufacturing | 2018 |
| RasilanRaitti Oy | Hospitality | 2012 |
| Rautionhovi Oy | Other services | 2022 |
| Ruokolahden LVI- ja Konetyö Oy | Construction | 2002 |
| Ruokolahden Leijona Oy | Real estate | 1996 |
| Ruokolahden Linna Oy | Real estate | 2000 |
| Ruokolahden Rakennustarvike OY | Wholesale & retail | 2016 |
| Ruokolahden Vuokratalot Oy | Real estate | 1989 |
| Ruokolahden Öljyt Oy | Other services | 1990 |
| SP Väänänen Oy | Construction | 2010 |
| Saimaan Hakesiirto Oy | Transport & logistics | 1997 |
| Saimaan Piha ja Huolto Oy | Administrative & support | 2021 |
| Saimaan Rakennus Visio Oy | Construction | 2025 |
| Saimaan Turistiliikenne Oy | Transport & logistics | 1994 |
| Siivous- ja kotiapupalvelu auttavat kädet Oy | Administrative & support | 2014 |
| Sineva Oy | Administrative & support | 2019 |
| TT Tarratehdas Oy | Professional & scientific | 2019 |
| Taksi Ruokolahti Oy | Transport & logistics | 2021 |
| Tilitoimisto Ruokolainen Oy | Professional & scientific | 2016 |
| Toffi Group Oy | Professional & scientific | 2016 |
| ToimenTupa Oy | Wholesale & retail | 2019 |
| TripEnj OY | Information & communication | 2026 |