| A. Hiltula Oy | Administrative & support | 2026 |
| Akvaariosoppi Oulu Oy | Wholesale & retail | 1998 |
| Ari Hiltula Ky | Hospitality | 1990 |
| Baari Chapline Avoin yhtiö | | 1988 |
| Business Simo Oy | Public administration | 2025 |
| EIK Engineering Oy | Professional & scientific | 2024 |
| Eero Kontio Ky | | 1989 |
| Havína By North Oy | Arts & recreation | 2018 |
| JK Vuokrakodit Oy | Real estate | 2024 |
| JiiPee Talotekniikka Oy | Construction | 2016 |
| Josveta Oy | Other services | 2008 |
| Jukka Hamari Ky | Transport & logistics | 2002 |
| K.Hekkanen Oy | Transport & logistics | 1978 |
| KiiSA-palvelut Oy | Administrative & support | 2016 |
| Kiinteistö Oy Simon Kiikanpalo | Real estate | 2005 |
| Kone Simoska Oy | Transport & logistics | 2018 |
| Kuiva-Turve Oy | Mining & quarrying | 1981 |
| Kuivaniemen Varaosa Ky | Wholesale & retail | 1986 |
| Kuljetus Antinoja avoin yhtiö | Transport & logistics | 2005 |
| Kuljetus Pajarit Oy | Transport & logistics | 2021 |
| Kuljetusliike Aimo Pääkkö Oy | Transport & logistics | 2012 |
| Kuljetusliike Pertti Ylitalo Oy | Transport & logistics | 2012 |
| Kumatra Oy | Transport & logistics | 2003 |
| LVI- ja Saneerauspalvelu Mika Tikka Ky | Construction | 2013 |
| Lainattu Rauha Oy | Education | 2026 |
| Lepanto - Yhtiö Ky | | 1992 |
| MJ Inspect Oy | Professional & scientific | 2023 |
| Matti Böök Oy | Construction | 1992 |
| Merilapin Vahinkotarkastus Oy | Professional & scientific | 2009 |
| Merilapin Vuokrahallit Oy | Administrative & support | 2012 |
| Metsä ja Maanrakennus Simoska Oy | Construction | 2020 |
| Nevesanet Oy | Administrative & support | 2013 |
| Oy Canomaran Ltd | Manufacturing | 2021 |
| PKT majoitus ja ohjelmapalvelut oy | Hospitality | 2023 |
| Pohjoisen Luonto Oy | Administrative & support | 2020 |
| Posti ja Pojat Ky | Transport & logistics | 1985 |
| Proser Oy | Professional & scientific | 2018 |
| Raija Knuuti Oy | Wholesale & retail | 1993 |
| RajaPro Oy | Administrative & support | 2017 |
| Rakennus J.Vilmi Oy | Construction | 2025 |
| Rakennusliike Ylisuvanto Oy | Construction | 1979 |
| Rantakairan Sähkö Oy | Energy | 1952 |
| Ravintola Vesimies ky | Hospitality | 1982 |
| SarianneP Oy | Hospitality | 2020 |
| Simojoen Lohiranta Oy | Administrative & support | 1998 |
| Simon Autopalvelu Liiten Oy | Wholesale & retail | 1976 |
| Simon KJS-Kiinteistöt Oy | Real estate | 2014 |
| Simon Leipomo Ky | Manufacturing | 1982 |
| Simon Peruna Oy | Real estate | 2021 |
| Simon Pyörä ja Kone Ky | Wholesale & retail | 1990 |
| Simon Turkis Ky | Agriculture & fishing | 1980 |
| Simon Turve ja Sora Ky | Mining & quarrying | 1980 |
| Simon Vesihuolto Oy | Water & waste | 1984 |
| Simon Vuokratalot Oy | Real estate | 1994 |
| Simon Yrityspalvelu Ky | Professional & scientific | 1984 |
| Simontori Jaakko Vaarala Ky | Wholesale & retail | 1980 |
| Sinni Group Oy | Construction | 2020 |
| Superior-Invest Oy | Financial services | 1992 |
| Swiss-Sisu Oy | Administrative & support | 2026 |
| TKA-mittaus Oy | Professional & scientific | 2010 |
| Taicala oy | Health & social care | 2024 |
| Tainikoski Oy | Manufacturing | 1992 |
| Timpurit Jäärni Oy | Construction | 2008 |
| Tirroniemi ja Poikila avoin yhtiö | Wholesale & retail | 2019 |
| Visit Simo Oy | Public administration | 2025 |
| huippuKOTO Oy | Real estate | 2020 |