| AD-Rantahuolto Oy | Other services | 2007 |
| Almac Oy | Professional & scientific | 1997 |
| AsiJanne Oy | Professional & scientific | 2021 |
| Asikkalan vesiosuuskunta | Water & waste | 1995 |
| Auvisen Ahvääri Oy | Financial services | 1988 |
| Catering 365 Oy | Hospitality | 2024 |
| CraftGrowft Oy | Professional & scientific | 2026 |
| Crosel Oy | Hospitality | 1996 |
| Design hotel Finland Oy | Hospitality | 2018 |
| ET Kunnossapito Oy | Manufacturing | 2026 |
| EleGrid Oy | Construction | 2019 |
| Esico Oy | Construction | 2024 |
| Euro-Ilpo Oy | Construction | 1999 |
| Finarsa Oy | Real estate | 2007 |
| Finland DMC Oy | Administrative & support | 2021 |
| Foto Arska Ky | Professional & scientific | 1987 |
| Helsingin Juridinen Oikeudellinen Apu Oy | Other services | 2021 |
| Hemapen Oy | Agriculture & fishing | 1992 |
| Hevosharju Oy | Arts & recreation | 2005 |
| Hikimaja Ky | Hospitality | 1992 |
| Holstein Milk Oy | Agriculture & fishing | 2016 |
| Hopeaminkki - Silvermink Ky | Agriculture & fishing | 1986 |
| Hotel Tahko Oy | Hospitality | 2022 |
| Houseboat Saimaa Oy | Hospitality | 2016 |
| Humppa Pumput Oy | Construction | 2025 |
| Huoltamo Oiva Naukkarinen Oy | Wholesale & retail | 1989 |
| Integroi Systems Oy | Information & communication | 2026 |
| J-P Leinonen Ky | Wholesale & retail | 2026 |
| JHV-Ventures Oy | Real estate | 2024 |
| JM hieronta & moniapu oy | Health & social care | 2021 |
| Jpek OY | Administrative & support | 2023 |
| Javendia Oy | Construction | 2014 |
| Jokakoko Oy | Health & social care | 1974 |
| Jorma Pylkkänen Oy | Transport & logistics | 1993 |
| Joutsenmäen Laivalaituriosuuskunta | Real estate | 1928 |
| Järvikarhu Oy | Hospitality | 2019 |
| Järvimaan Osuuspankki | Financial services | 1922 |
| Järvisydän Oy | Hospitality | 2012 |
| Kalastus Television Oy | Information & communication | 2018 |
| Karin Paja Ky | Manufacturing | 1992 |
| Kiinteistö Oy Rantasalmen Teollisuustilat | Real estate | 2017 |
| Kiinteistö Oy Rantasalmen Vuokratalot | Real estate | 1996 |
| Kiinteistö Oy Ruusunranta | Real estate | 2009 |
| Kiinteistö Oy Södervik Mansions | Hospitality | 2013 |
| Kiinteistöosakeyhtiö Leviboxi Oy | Real estate | 2010 |
| Kiinteistöosakeyhtiö Rantasalmen Hoivakiinteistöt | Real estate | 2026 |
| Kiinteistöosakeyhtiö Rantasalmen Kuusela | Real estate | 2026 |
| Kukka- ja Hautauspalvelu SatuKukka Oy | Wholesale & retail | 2008 |
| Kuljetus Marko Vänskä Oy | Transport & logistics | 2016 |
| Kuru Resort Saimaa Oy | Hospitality | 2019 |
| Kylmäkaarre Oy | Construction | 2022 |
| LVI-Hapro Oy | Construction | 2015 |
| Leislahden vesiosuuskunta | Construction | 1996 |
| Linnansaari Consulting Oy | Administrative & support | 2020 |
| LomaPihlaja Oy | Hospitality | 2007 |
| LomaSydän Oy | Hospitality | 2006 |
| Lomakylä Järvisydän Oy | Hospitality | 1982 |
| LuPa Forest Oy | Agriculture & fishing | 2025 |
| Luonto 365 Oy | Transport & logistics | 2015 |
| M & J Plaketti | Wholesale & retail | 2025 |
| Mansikkaharju Oy | Agriculture & fishing | 2021 |
| Metsäpalvelu M.Nissinen Oy | Agriculture & fishing | 2024 |
| Metsätyö Räisänen Oy | Agriculture & fishing | 1990 |
| Milk Hill Oy | Agriculture & fishing | 2026 |
| Monipalvelu Tallqvist Oy | Construction | 2021 |
| Monipalvelu karhu oy | Other services | 2023 |
| Mustalahti-Porosalmi Huolto Oy | Administrative & support | 2021 |
| NaLa Forest Oy | Agriculture & fishing | 2023 |
| NautaTeam Oy | Agriculture & fishing | 2018 |
| Northern Lights Saariselkä Oy | Hospitality | 2023 |
| OR Welding Oy | Manufacturing | 1998 |
| Onnenhelma Oy | Health & social care | 1997 |
| Organic Waste Ferment OW-F Oy Ltd | Professional & scientific | 2023 |
| Orkopal Oy | Real estate | 1993 |
| Osikonmäen Tila Oy | Agriculture & fishing | 1993 |
| Osikonmäen vesiosuuskunta | Water & waste | 1991 |
| Oy Porvoon Nevus Ab | Agriculture & fishing | 1995 |
| Parturi-Kampaamo TITAANI Oy | Other services | 2005 |
| Pauli Korhonen Oy | Construction | 2018 |
| Pel-Tuote Oy | Manufacturing | 1990 |
| Pirunvuori Oy | Hospitality | 2008 |
| Pitkävaara Oy | Real estate | 2025 |
| Planiteasy Oy | Information & communication | 2025 |
| Porosalmen Satama Oy | Transport & logistics | 2017 |
| ProAvi Oy | Transport & logistics | 2018 |
| Proffice Oy | Professional & scientific | 1984 |
| Puolukka Capital Oy | Real estate | 2019 |
| Pyyvilä Oy | Arts & recreation | 2013 |
| RS Resort Services Oy | Administrative & support | 2022 |
| RT-Consulting Oy | Professional & scientific | 2023 |
| RT-Restaurants Oy | Hospitality | 2022 |
| Rakennuspalvelut Leminen Oy | Construction | 2023 |
| Rantasalmen Huvilavalmistamo Korhonen Oy | Manufacturing | 1984 |
| Rantasalmen Kehitys Oy | Hospitality | 2009 |
| Rantasalmen Lehti Oy | Information & communication | 2016 |
| Rantasalmen Lehtitalo Oy | Information & communication | 1968 |
| Rantasalmen Maanrakennus Oy | Construction | 2004 |
| Rantasalmen Rakentajat VSE Oy | Construction | 2024 |
| Rantasalmen Rantametsä Oy | Hospitality | 2023 |
| Rantasalmen Sähköpiste ky | Construction | 1985 |