| A & J Store Avoin yhtiö | Wholesale & retail | 2002 |
| A.Hämäläinen Oy | Manufacturing | 2024 |
| AP Wood Oy | Wholesale & retail | 2004 |
| Alpeko oy | Health & social care | 2000 |
| Apre Solution Oy | Administrative & support | 2022 |
| Baari Bunkero Oy | Hospitality | 2016 |
| Essikoo Oy | Wholesale & retail | 2024 |
| Evrim Avoin yhtiö | Hospitality | 2017 |
| Evt Consult Oy | Administrative & support | 2021 |
| FitWay Oy | Arts & recreation | 2018 |
| Forest Saimaa Oy | Agriculture & fishing | 2014 |
| Fortensi Oy | Hospitality | 2020 |
| Harjun Portti Oy | Hospitality | 2019 |
| Heinäveden Kukka- ja Hautauspalvelu M. Muhonen Ky | Other services | 1988 |
| Hotelli Punkaharju Oy | Hospitality | 2024 |
| Immosen Kauppatalo Oy | Real estate | 1989 |
| Inrak Oy | Professional & scientific | 2004 |
| Itä-Suomi Nousee Oy | Real estate | 2026 |
| Joros Holding Oy | Financial services | 2018 |
| Joros Oy | Manufacturing | 1983 |
| KR-Produktio Oy | Information & communication | 2006 |
| Kalastus ja Konetyö Makkonen Oy | Administrative & support | 2020 |
| Karjalan Harkko Ky | Manufacturing | 1988 |
| Karjalan Lastaus & Energia Oy | Transport & logistics | 2013 |
| Kiinteistö Oy Juvan Salmensilta | Real estate | 1988 |
| Kiinteistö Oy Punkaharjun Valtionhotelli | Real estate | 2005 |
| Kiinteistö Oy Tuunaanranta | Hospitality | 2009 |
| Kiinteistöosakeyhtiö Punkaharjun Rahala | Real estate | 2022 |
| KimSal Oy | Professional & scientific | 2023 |
| Kone- ja Metallityö Powergroup Oy | Construction | 2010 |
| Kone-Kautonen Ky | Construction | 2001 |
| Kone-Koivumäki Oy | Agriculture & fishing | 2016 |
| Konehuolto Reponen oy | Manufacturing | 2023 |
| Kruunupuisto Oy | Hospitality | 2006 |
| Kuhankeittäjä Oy | Hospitality | 2024 |
| Kuikka ja Piiroinen | Wholesale & retail | 2006 |
| Kuljetusliike Silventoinen Oy | Transport & logistics | 1980 |
| Laanre Oy | Construction | 2020 |
| Lakikannel Oy | Professional & scientific | 2008 |
| Linnan Iiris Oy | Other services | 2021 |
| Literata Oy | Professional & scientific | 2015 |
| Luhtarinne-Trading Oy | Administrative & support | 2024 |
| Lumo Education Oy | Education | 2016 |
| Luola Events Oy | Arts & recreation | 2018 |
| Luston Tuki Oy | Wholesale & retail | 1993 |
| Masina Works Oy | Other services | 2019 |
| Meander Oy | Professional & scientific | 2010 |
| Mutikainen Invest Oy | Financial services | 2026 |
| NDT-Punkaharju Oy | Professional & scientific | 2019 |
| Nida-Kulta Oy | Wholesale & retail | 1998 |
| Oy Absto Ltd | Financial services | 1997 |
| Palveluasema Lötjöset Oy | Wholesale & retail | 1994 |
| Pekorak Oy | Construction | 2025 |
| Pekovest Oy | Real estate | 2026 |
| Pullaposki Oy | Manufacturing | 2016 |
| Punkaharju Resort Oy | Hospitality | 2018 |
| Punkaharjun AM-Asennus Oy | Manufacturing | 1993 |
| Punkaharjun Harjutie Oy | Professional & scientific | 2021 |
| Punkaharjun Keilahalli Oy | Arts & recreation | 1991 |
| Punkaharjun Kiinteistöhuolto avoin yhtiö | Administrative & support | 1983 |
| Punkaharjun Kilpi Oy | Manufacturing | 2000 |
| Punkaharjun Lämpö Oy | Energy | 1980 |
| Punkaharjun Metsäpalvelu Oy LKV | Agriculture & fishing | 2006 |
| Punkaharjun Miraki Oy | Agriculture & fishing | 1992 |
| Punkaharjun Puutaito Oy | Wholesale & retail | 1989 |
| Punkaharjun Sahakiinteistö Oy | Real estate | 1972 |
| Punkaharjun Siltavahti Ky | | 1991 |
| Punkaharjun Tilitoimisto Oy | Professional & scientific | 2011 |
| Punkainvest Oy | Real estate | 1980 |
| Punkakone Oy | Manufacturing | 2006 |
| Punkasalmen Saha ja Höylä Oy | Manufacturing | 1986 |
| Puruveden Kala ja Loma Kommandiittiyhtiö | Hospitality | 1987 |
| Puusepänliike Heiskanen Avoin yhtiö | Manufacturing | 1979 |
| RV-Taksipalvelut Oy | Transport & logistics | 2024 |
| Rakennusliike Pasit Oy | Construction | 2013 |
| Retretti Oy | Arts & recreation | 1996 |
| Riitek Group Oy | Manufacturing | 2023 |
| Riitek Oy | Manufacturing | 2007 |
| Riitek Tube Oy | Manufacturing | 2024 |
| SIA "ALANDI", Suomen sivuliike | Hospitality | 2018 |
| Saimaa Jätevex Oy | Manufacturing | 2020 |
| Saimaa Relax Oy | Administrative & support | 2020 |
| Saimaan Lauttahuvilat Oy | Hospitality | 2019 |
| Saimaan Sielu Oy | Hospitality | 2021 |
| Savo-Karjalan Metsätyö Oy | Agriculture & fishing | 1990 |
| Sirkooli Avoin yhtiö | Construction | 2008 |
| SoteHarju Oy | Health & social care | 2021 |
| SparkDog Capital Oy | Financial services | 2016 |
| Spesiaaliasennus Oy | Construction | 2016 |
| Suurkeittiömyynti TH Oy | Wholesale & retail | 1989 |
| Sähkötyö Ovaska Oy | Construction | 1963 |
| TAOT Oy | Hospitality | 2021 |
| TAsol Oy | Wholesale & retail | 2020 |
| TR Solutions Oy | Wholesale & retail | 2013 |
| TR-Meka Oy | Manufacturing | 1993 |
| Taksipalvelu N. Mikkonen Oy | Transport & logistics | 2019 |
| Tilikumppanit Ky | Professional & scientific | 1982 |
| Tilipalvelu Sari Naukkarinen Oy | Professional & scientific | 2024 |
| Tilitoimisto Dorotea Oy | Professional & scientific | 2024 |
| Tonyn Kirppis ja Huolto Oy | Hospitality | 2025 |