| 1138 Annika Känsäkangas Oy | Wholesale & retail | 2014 |
| AP Tilapalvelu Oy | Agriculture & fishing | 2010 |
| ARK:sto Oy | Professional & scientific | 2024 |
| AimForest Oy | Agriculture & fishing | 2023 |
| Aki Järvelä Oy | Arts & recreation | 2005 |
| Alitalon tila Oy | Health & social care | 2019 |
| Amalia Cottages Oy | Hospitality | 2024 |
| Analog Way Finland Oy | Information & communication | 2007 |
| ArMi Production Oy | Construction | 2015 |
| Arctic Indoor Movement Oy | Education | 2016 |
| Arctosmedia Oy | Professional & scientific | 2015 |
| Ari Känsäkangas Oy | Agriculture & fishing | 2012 |
| Arteax Oy | Construction | 1993 |
| Aurolahti Reality Capture Oy | Professional & scientific | 2019 |
| Autokoski Ky | Wholesale & retail | 2000 |
| BMH Capital Partners Oy | Financial services | 2015 |
| Botnia Gas Oy | Energy | 2024 |
| Botnia Pack Oy | Wholesale & retail | 2005 |
| Codetag Oy | Information & communication | 2012 |
| Country BioFuel avoin yhtiö | Manufacturing | 2006 |
| EJ Kettu Oy | Agriculture & fishing | 2010 |
| EJ-Sasu Ky | Construction | 2011 |
| EN Vesala Oy | Construction | 2013 |
| Esseli Oy | Other services | 2013 |
| FIRMA:sto Ky | Professional & scientific | 2007 |
| Findest Protein Oy | Water & waste | 1993 |
| Finehta Oy | Wholesale & retail | 2024 |
| Finelc Oy | Professional & scientific | 2010 |
| Finnmehl Oy | Manufacturing | 2019 |
| Finpellet Oy | Manufacturing | 2023 |
| Foxstreet Delivery Oy | Transport & logistics | 2014 |
| Furfix Oy | Manufacturing | 2000 |
| H & J Paavola Oy | Construction | 2006 |
| Hammastuttava Oy | Health & social care | 2021 |
| Hanhigroup Oy | Construction | 2015 |
| Hanso Wood Oy | Administrative & support | 1993 |
| Heavy Invest Oy | Hospitality | 2022 |
| HeidMel Oy | Health & social care | 2021 |
| Heikkilän Turkistarha Oy | Agriculture & fishing | 1984 |
| Heino Hanhikoski Oy | Agriculture & fishing | 1981 |
| Horsefly Games Oy | Information & communication | 2022 |
| Hot-Fox Oy | Agriculture & fishing | 2010 |
| I & M Penttilä Oy | Agriculture & fishing | 1996 |
| Infrapaja Oy | Professional & scientific | 2025 |
| Ins.tsto R-SUUNNITTELU Kaustinen Oy | Professional & scientific | 2015 |
| J & A Myllymäki Oy | Transport & logistics | 2005 |
| J. Timmerbacka Oy | Transport & logistics | 1977 |
| JJ Fix&Color Oy | Other services | 2020 |
| JJ Penttilä Oy | Agriculture & fishing | 1996 |
| JJT Niiranen Oy | Agriculture & fishing | 2024 |
| JL-Turkis Oy | Agriculture & fishing | 1995 |
| JRHR-kiinteistöhuolto Oy | Administrative & support | 1990 |
| JT-Komposti Oy | Water & waste | 1998 |
| Jakelu Aamunrusko Oy | Transport & logistics | 2015 |
| Jari ja Pekka Myllymäki Oy | Agriculture & fishing | 1985 |
| Jarmo Jylhän Turkis Oy | Agriculture & fishing | 1996 |
| Jaspat Oy | Real estate | 2023 |
| JenninTuvat Oy | Real estate | 2024 |
| Jokivarren Limu Oy | Manufacturing | 2024 |
| Joliem Oy | Wholesale & retail | 2020 |
| Jylhä Tech Oy | Agriculture & fishing | 2023 |
| Jyri Koukkari Oy | Arts & recreation | 2023 |
| KJ TURVAPALVELUT Avoin Yhtiö | Other services | 2010 |
| KJ Utriainen Oy | Agriculture & fishing | 1972 |
| Kvt-Vesihuolto OY | Water & waste | 2007 |
| Kai Kuorikoski Oy | Agriculture & fishing | 2021 |
| Kaluste-Annala Ky | Wholesale & retail | 1986 |
| Kami-Fox Oy | Agriculture & fishing | 1976 |
| Kappelin Grilli Oy | Hospitality | 2016 |
| Kappelin Tilikulma Oy | Professional & scientific | 1994 |
| Kari Kattilakosken Turkis Oy | Agriculture & fishing | 1994 |
| KaseNet Oy | Information & communication | 2005 |
| Kausse Oy | Manufacturing | 1964 |
| Kaustisen Auto Ay, avoin yhtiö | Wholesale & retail | 1986 |
| Kaustisen Elementtivalmiste Oy | Manufacturing | 1983 |
| Kaustisen Energiaosuuskunta | Wholesale & retail | 2000 |
| Kaustisen Fysioterapia Ky | Health & social care | 2011 |
| Kaustisen Hammaspalvelu Oy | Health & social care | 1987 |
| Kaustisen Hiihtokeskus, Avoin Yhtiö | Arts & recreation | 1981 |
| Kaustisen Humustuote Ky | | 1985 |
| Kaustisen Jäsenkorjaus Oy | Health & social care | 2008 |
| Kaustisen Kansantaiteenkeskus Oy | Real estate | 1990 |
| Kaustisen Kauppakeskus Oy | Wholesale & retail | 1946 |
| Kaustisen Kehitys Oy | Real estate | 1978 |
| Kaustisen Kiila Oy | Real estate | 2024 |
| Kaustisen Kulmakamari Oy | Hospitality | 2025 |
| Kaustisen Laaturakentajat Oy | Construction | 1998 |
| Kaustisen Lasipalvelu Ky | Construction | 1979 |
| Kaustisen Lämpö Oy | Energy | 1989 |
| Kaustisen Monitoimi Oy | Manufacturing | 1998 |
| Kaustisen Osuusmeijeri | Wholesale & retail | 1916 |
| Kaustisen Pelimanni-Ravintola Oy | Hospitality | 1985 |
| Kaustisen TB-huolto Ky | Wholesale & retail | 1982 |
| Kaustisen Tunturimajat avoin yhtiö | Real estate | 1984 |
| Kaustisen Varaosat Oy | Wholesale & retail | 1989 |
| Kaustisen Väriliike Ky | Wholesale & retail | 1995 |
| Kaustisrakennus Oy | Real estate | 1986 |
| Kello ja Kulta Sillanpää avoin yhtiö | Wholesale & retail | 1989 |
| Kiinteistö Oy Kaustisen Rajakulma | Real estate | 2008 |
| Kiinteistö Oy Kaustisen oppilasasuntolat | Real estate | 1992 |