| Kiinteistö Oy Ähtärin Inhantie | Real estate | 2013 |
| Kiinteistö Oy Ähtärin Paljekuja | Real estate | 2011 |
| Kiinteistö Oy Ähtärin Sairaalanmäki | Real estate | 2001 |
| Kiinteistö Oy Ähtärin Vuokratalot | Real estate | 1992 |
| Kone-Mörönen Oy | Mining & quarrying | 2024 |
| Koneurakointi RKJ avoin yhtiö | Agriculture & fishing | 1989 |
| Koneurakointi Uusitalo Oy | Agriculture & fishing | 2025 |
| Koneurakointi ja Kiinteistöhuolto Simo Martikainen Oy | Construction | 2015 |
| Korsumäen Auto Ky | Wholesale & retail | 1980 |
| Korteslampi Oy | Agriculture & fishing | 1990 |
| Koskimaa Racing Ky | Arts & recreation | 2007 |
| Ksentos Oy | Real estate | 2004 |
| Kuljetus Hietakangas Oy | Transport & logistics | 2020 |
| Kuljetus Kestinmäki Oy | Transport & logistics | 2004 |
| Kuljetus-Savolainen Oy | Transport & logistics | 1978 |
| KuljetusViinikka Oy | Transport & logistics | 2014 |
| Kuljetusliike Haveri Oy | Transport & logistics | 1989 |
| Kuntosali BodyPlace Oy | Arts & recreation | 2016 |
| Kuntosali Taku Oy | Arts & recreation | 2007 |
| Kylä-osuuskunta Gaija | Other services | 1999 |
| LRa Palvelut Oy | Agriculture & fishing | 2018 |
| LVI A. Akonniemi Oy | Construction | 1988 |
| LVI-Setälä Oy | Construction | 2018 |
| Lahja- ja Käsityöpaja Niittyvilla avoin yhtiö | Manufacturing | 2005 |
| LehtoPeat Oy | Manufacturing | 1997 |
| Leipomo-kahvila Körkkö Ky | Manufacturing | 2003 |
| Leipomotuote Katriina Oy | Hospitality | 2000 |
| Levin Kiela Loma Club 1&5 Oy | Real estate | 2002 |
| Lively Entertainment Oy | Arts & recreation | 2020 |
| M-Market Ähtäri Oy | Wholesale & retail | 2007 |
| MK-Sorvaus Oy | Manufacturing | 2000 |
| MT Omistus -ja Palveluyhtiö Oy | Administrative & support | 2019 |
| MZ Point Oy | Wholesale & retail | 2020 |
| Maanrakennus Suomenselkä Oy | Construction | 1994 |
| Mainiokone Oy | Wholesale & retail | 1985 |
| Mariant Oy | Wholesale & retail | 1987 |
| Mayday Ähtäri Oy | Wholesale & retail | 1988 |
| Megeve Trust Oy | Financial services | 2022 |
| Merkenta Oy | Construction | 2019 |
| Mesikämmenen Kuntoutus Oy | Health & social care | 1992 |
| Mestari ja Poika Oy | Construction | 2021 |
| Metsä-Ylätalo Oy | Administrative & support | 1995 |
| Metsäpalvelut Seppäkoski Oy | Agriculture & fishing | 2005 |
| Metvil Ky | Construction | 1999 |
| Mikari Moksunniemi Oy | Hospitality | 2022 |
| Muchos Pesos Oy | Financial services | 2021 |
| Mullivainio Oy | Agriculture & fishing | 2018 |
| Muovilami Oy | Manufacturing | 1967 |
| Musakunkku Ky | Information & communication | 2018 |
| Mäkelän Rauta Oy | Wholesale & retail | 2007 |
| Mäntän Konditoria-Kahvila Avoin yhtiö | Wholesale & retail | 1991 |
| Mökki Aarre Oy | Real estate | 2018 |
| NM-Muuraus Ky | Construction | 2017 |
| Nelipuiston Säästöliekki Oy | Energy | 1978 |
| Niko Korsumäki Racing Oy | Other services | 2016 |
| Nordic Sand Oy | Real estate | 2016 |
| North Flow Oy | Other services | 2021 |
| Nuivain Oy | Agriculture & fishing | 2013 |
| Nurmomet Oy | Wholesale & retail | 1991 |
| Oikotien Kiinteistö Oy | Real estate | 1989 |
| Ostolan Fysio Keskus Oy | Health & social care | 1991 |
| Ostolan Sähkö Oy | Construction | 1988 |
| Ostolan Tilitoimisto Oy | Professional & scientific | 1990 |
| Ostolan toimitilat Oy | Real estate | 2016 |
| Osuuskunta KAMP | Other services | 2011 |
| Oy Polarbruk Ab | Manufacturing | 2020 |
| PJJ-Steel OY | Construction | 2023 |
| PP Trans Oy | Transport & logistics | 1989 |
| Purku Ja Rakennus Tenhunen OY | Construction | 2026 |
| PVC-Katteet Oy Suomi | Construction | 2012 |
| Panda Chalet Oy | Administrative & support | 2016 |
| Paradise Home Oy | Real estate | 2024 |
| Patako Oy | Administrative & support | 2023 |
| Pavorak Oy | Construction | 1981 |
| Piazzatores Ky | Professional & scientific | 2008 |
| Pohjanmaan Matkatoimisto Oy | Administrative & support | 2003 |
| Pub P-51 Oy | Hospitality | 2008 |
| Puhutaas Oy | Health & social care | 2026 |
| Pulverpaint Oy | Manufacturing | 2000 |
| REMU Holding Oy | Financial services | 2010 |
| REMU Oy | Manufacturing | 1997 |
| ROM-Line Oy | Real estate | 1992 |
| RP-Weld Oy | Manufacturing | 2017 |
| Rahkaneva Oy | Mining & quarrying | 2010 |
| Raivio Films Oy | Information & communication | 2009 |
| Rakennus Tikkamäki Oy | Construction | 2011 |
| Rakennuskatsastus Kuoppala Oy | Professional & scientific | 2005 |
| Rakennusliike P. Lamminmäki Oy | Construction | 1989 |
| Rakennusliike Ruuhilehto Oy | Construction | 2011 |
| Rakennuspalvelu Immo Mörönen Ky | Construction | 1996 |
| Rakennuspalvelu Veisi Oy | Construction | 2020 |
| Rakentajapalvelu J-P Virta Ky | Construction | 1993 |
| Rannilan Kuljetus Oy | Transport & logistics | 1996 |
| Redorf Oy | Professional & scientific | 2025 |
| Remixer Oy | Wholesale & retail | 2026 |
| Rent Mex Oy | Hospitality | 2017 |
| Rinozero Finland Oy | Wholesale & retail | 2024 |
| Ripala Oy | Transport & logistics | 2021 |
| Rkl 6-Nurkka Oy | Construction | 2007 |
| RohtoTeivas Oy | Wholesale & retail | 2025 |