| Kivi Acoustics Oy | Manufacturing | 2025 |
| Kodin Korhonen Oy | Wholesale & retail | 1981 |
| Kokkomäentien vesiosuuskunta | Water & waste | 2010 |
| Kone-Rossi Oy | Administrative & support | 1982 |
| KoneRaivio Oy | Construction | 2009 |
| Kopsi Oy | Financial services | 1987 |
| Koskelon Marjamaa Oy | Agriculture & fishing | 1992 |
| Koskelon Matkailukeskus Oy | Hospitality | 1998 |
| Kotihoiva Aino Oy | Health & social care | 2012 |
| Kotipari Oy | Administrative & support | 2007 |
| Kukkakauppa ja hautaustoimisto Ruusunen Oy | Wholesale & retail | 2021 |
| Kuljetus Arto Lappalainen Ky | Transport & logistics | 1996 |
| Kuljetus Heikki Juhani Niemelä Ky | Transport & logistics | 1999 |
| Kuljetus Konttinen Ky | Transport & logistics | 1985 |
| Kuljetusliike Eelis Järvikylä Ky | Transport & logistics | 1983 |
| Kuljetusliike M. Pohjolainen ky | Transport & logistics | 1990 |
| Kuljetusliike MinPet Oy | Transport & logistics | 2003 |
| Kullaa Corporation | Hospitality | 2001 |
| Kuntokeskus Timmi Oy | Arts & recreation | 2014 |
| Kuusamo Food Invest Oy | Financial services | 2015 |
| LVI-Pellinen Oy | Construction | 2013 |
| Laico Oy | Health & social care | 2023 |
| Lakiasiaintoimisto Maiju Haataja Oy | Professional & scientific | 2023 |
| Lakiasiaintoimisto Pauli Markkanen Ky | Professional & scientific | 2004 |
| Laskulko Oy | Transport & logistics | 2019 |
| Lempyyn Juuresjaloste Oy | Manufacturing | 2010 |
| Lempyyn vesihuolto-osuuskunta | Water & waste | 2007 |
| Liikenne Nuutinen Oy | Transport & logistics | 1984 |
| Lähikauppa Riitta Ky | Wholesale & retail | 1990 |
| Mijoco OY | Construction | 2015 |
| MISECO Avoin yhtiö | Construction | 2004 |
| MTL-Tec avoin yhtiö | Professional & scientific | 2013 |
| Maalausliike Oikarinen Oy | Construction | 1976 |
| Maatila Suihkonen Oy | Agriculture & fishing | 2014 |
| Marja-Seppälä Oy | Agriculture & fishing | 2001 |
| Marja-Suomen Laatikkopalvelu Veikko Raivio Ky | Manufacturing | 1992 |
| Marja-Suomen Taimituotanto Oy | Agriculture & fishing | 2000 |
| MarjaMuijat Oy | Wholesale & retail | 2025 |
| Marjasuomen Viihdekeskus ky | Hospitality | 1996 |
| Marjatila Karinen Oy | Agriculture & fishing | 2020 |
| MarkkinointiMaestro Oy | Professional & scientific | 2020 |
| Markku Helli Consulting Oy | Wholesale & retail | 2009 |
| Matin Kodintekniikka Ky | Wholesale & retail | 1991 |
| Matril Oy | Professional & scientific | 1992 |
| Matti Helminen Oy | Agriculture & fishing | 1987 |
| Matti Leppälä Oy | Financial services | 1989 |
| MaybeRock Oy | Administrative & support | 2020 |
| Mestarinkulma Suonenjoki Oy | Hospitality | 2025 |
| Metsäkuljetus Hirvonen Oy | Transport & logistics | 1999 |
| Metsän terveyslannoitus Oy | Agriculture & fishing | 2021 |
| Metsäpellon Mansikat Oy | Agriculture & fishing | 2019 |
| Milk In Oy | Manufacturing | 1994 |
| MiloTec Oy | Construction | 2019 |
| Mitasoros Oy | Manufacturing | 2015 |
| Murmelot Oy | Education | 2021 |
| Myllykosken Kievari Oy | Hospitality | 1995 |
| Naavataival Oy | Health & social care | 2018 |
| Niekkari Welding Oy | Construction | 2003 |
| OSTP Suonenjoki Oy | Manufacturing | 2004 |
| Omar Ravintola avoin yhtiö | Hospitality | 2011 |
| One Lion Company Oy | Information & communication | 2026 |
| Osuuskunta Maitomaa | Manufacturing | 1915 |
| OxyGoal Oy | Education | 2024 |
| Oy Resmanagras Ltd | Hospitality | 1996 |
| P&P Serguskin avoin yhtiö | Professional & scientific | 2020 |
| P.A Turpeisen Huoltamoyritys oy | Wholesale & retail | 2005 |
| Pakkasmarja Oy | Wholesale & retail | 1981 |
| Parta Games Oy | Information & communication | 2015 |
| Pellonpään Marjat Oy | Agriculture & fishing | 2020 |
| Peltisepänliike J. Pöyhönen Oy | Construction | 2010 |
| Pentti Husso Ky | Agriculture & fishing | 1987 |
| Perälän Marja Oy | Agriculture & fishing | 2020 |
| Pia Crista Clothing Oy | Wholesale & retail | 2004 |
| Pietarin Betonilattiat Oy | Real estate | 1991 |
| Pipliakangas Oy | Agriculture & fishing | 2019 |
| Pizzeria Kausala avoin yhtiö | Hospitality | 2011 |
| Pizzeria Tulppaani ky | Hospitality | 2005 |
| Prosita Oy | Wholesale & retail | 2002 |
| RKL A. Kimonen Oy | Construction | 2015 |
| Raidea Oy | Professional & scientific | 2026 |
| Raitavuo Ky | Wholesale & retail | 1962 |
| Rakennusliike Kuoma Oy | Construction | 1995 |
| Rakennusliike Pihatto Oy | Construction | 2006 |
| RasOsa Oy | Wholesale & retail | 2025 |
| Rautalammin Auto Oy | Transport & logistics | 1949 |
| Rautalammin Kone Ky | Wholesale & retail | 1983 |
| Ravintola Valkoapila Oy | Hospitality | 2001 |
| Regazo Oy | Administrative & support | 2025 |
| Reijo Wallin ky | Wholesale & retail | 1980 |
| Romunkeräys Pulkkinen Oy | Wholesale & retail | 2006 |
| Savon Asuntokauppa OY LKV | Real estate | 2007 |
| SFR Savo Oy | Education | 2018 |
| SNJ Rakennus- ja Remonttipalvelu Oy | Construction | 1997 |
| SPT-Asennus Oy | Construction | 1992 |
| SR Metsäpalvelu OY | Agriculture & fishing | 2021 |
| SSA Invest Oy | Financial services | 2021 |
| Salon Bellezza oy | Other services | 2025 |
| Sandarjo Oy | Professional & scientific | 2011 |
| Sanna-Mari Iskanius Oy | Public administration | 2024 |
| SannaElina Oy | Health & social care | 2025 |