| Nordlett Oy | Hospitality | 2011 |
| Nosto ja kuljetus J Rusanen Oy | Transport & logistics | 1993 |
| OPL Performance Oy | Arts & recreation | 2026 |
| Obliviyn Music Ky | Information & communication | 2026 |
| Oleilu Oy | Hospitality | 1990 |
| One Fleet Oy | Administrative & support | 2022 |
| Ontojoen Koneasema Oy | Construction | 2019 |
| Op Group Ky | Professional & scientific | 2013 |
| Optikko Vuori Oy | Wholesale & retail | 2002 |
| Osuuskunta Maan Makiaiset | Agriculture & fishing | 2015 |
| Osuuskunta Raide työelämään | Administrative & support | 2016 |
| Osuuskunta Sotkamon Monitaiturit | Administrative & support | 1999 |
| Oulun Yritystakomo Oy | Professional & scientific | 2010 |
| Outlet Factory Oy | Wholesale & retail | 2016 |
| Oy Group Gardie Ltd | Construction | 2011 |
| Oy Indos Ltd | Construction | 2004 |
| P E Karppinen Oy | Agriculture & fishing | 2016 |
| PP Lvi Oy | Construction | 2021 |
| Pajakka Group Oy | Wholesale & retail | 2013 |
| Pakela Oy | Agriculture & fishing | 2013 |
| Palvelut Romppanen Oy | Real estate | 2019 |
| Pappilanvaara Oy | Hospitality | 1997 |
| Parturi Kampaamo Satu Mähönen Ky | Other services | 2016 |
| Parturi imaj Oy | Other services | 2023 |
| Pekka Haapalainen Oy | Transport & logistics | 1990 |
| Pian kotipalvelu Ky | Health & social care | 2013 |
| Pihlajalinna Kainuu Oy | Health & social care | 2020 |
| Pilot & Transport Oy | Transport & logistics | 2023 |
| Pizzeria Reijo Piipponen Ky | Hospitality | 1987 |
| Pohjolan Talotekniikka Oy | Construction | 2026 |
| Polarica Marjahankinta Oy | Manufacturing | 2017 |
| Puheterapia HMH oy | Health & social care | 2011 |
| Puustudio Uurre Oy | Manufacturing | 2024 |
| Pystö Oy | Construction | 2025 |
| R Kaipainen Ky | Mining & quarrying | 1990 |
| Ravex OY | Other services | 2004 |
| RKL Kainuun JK-Palvelut Oy | Construction | 2013 |
| Rafter Oy | Wholesale & retail | 2026 |
| Rajala-palvelut avoin yhtiö | Agriculture & fishing | 2021 |
| Rakennetuotanto RT Salovaara Oy | Construction | 2012 |
| Rakennus Hietakanta Oy | Construction | 2020 |
| Rakennusliike Marko Niskanen Oy | Construction | 2020 |
| Rakennuspalvelu Novamas Oy | Professional & scientific | 2005 |
| Ratatien Rengas Oy | Wholesale & retail | 2014 |
| Ravintola Carolina Tauren Avoin yhtiö | Hospitality | 1989 |
| Ravintola Ruthai Oy | Hospitality | 2018 |
| Ravintola Sotkamon Vintti Ky | Hospitality | 2002 |
| Red House Dogs Oy | Administrative & support | 2004 |
| Rekivesi OSK | Construction | 2003 |
| Rengashuiput Oy | Wholesale & retail | 2006 |
| S & I Urakoinnit Oy | Real estate | 2022 |
| SR Rakennuttajat Oy | Real estate | 2022 |
| SSR Konetyö Oy | Administrative & support | 2001 |
| SV-Sähkö Oy | Construction | 1989 |
| SVR Korhonen Oy | Professional & scientific | 2022 |
| SafeGaia Oy | Real estate | 1989 |
| Samin Ratkaisut Ky | Wholesale & retail | 2017 |
| Sanchez-Juhkov Oy | Real estate | 2021 |
| Sanecon Oy | Construction | 2014 |
| Seiron Advisory Oy | Professional & scientific | 2026 |
| Semper Fidelis Oy | Administrative & support | 2022 |
| Siliver Oy | Wholesale & retail | 2016 |
| Sirjatar Oy | Education | 2023 |
| Sisustajankauppa Oksanen Ky | Wholesale & retail | 1975 |
| Sky High Events Oy | Arts & recreation | 2017 |
| Skyteam Oy | Wholesale & retail | 1994 |
| Sotka-Invest Oy | Financial services | 1987 |
| Sotkamo Silver AB, Suomen sivuliike | Mining & quarrying | 2018 |
| Sotkamo Silver Oy | Mining & quarrying | 2006 |
| Sotkamon Autohuolto Oy | Wholesale & retail | 1976 |
| Sotkamon Eväslaituri Oy | Hospitality | 2015 |
| Sotkamon Hammasparatiisi Oy | Health & social care | 2008 |
| Sotkamon Hautaus- ja kukkapalvelu Oy | Other services | 2026 |
| Sotkamon Huoltohalli Oy | Real estate | 2020 |
| Sotkamon Kauppahalli Oy | Real estate | 1995 |
| Sotkamon Keskusliike Oy | Wholesale & retail | 1938 |
| Sotkamon Kiinteistöhuolto Oy | Administrative & support | 2018 |
| Sotkamon Kirjakauppa Ky | Wholesale & retail | 1932 |
| Sotkamon Kodit Oy | Real estate | 2007 |
| Sotkamon Konepalvelu Ky | Wholesale & retail | 1981 |
| Sotkamon Kuljetin ja Rengashuolto Oy | Other services | 2016 |
| Sotkamon Kuljetus Oy | Transport & logistics | 1952 |
| Sotkamon LVI-asennus Ky | Construction | 1990 |
| Sotkamon Lakipalvelu Oy | Professional & scientific | 2020 |
| Sotkamon Laskenta- ja Tilipalvelu Oy | Professional & scientific | 1983 |
| Sotkamon Löytölehti ja -kirja Oy | Wholesale & retail | 1996 |
| Sotkamon Peltityö kommandiittiyhtiö | Construction | 1988 |
| Sotkamon Rakennus Invest Oy | Financial services | 2013 |
| Sotkamon Rakennus Oy | Construction | 2013 |
| Sotkamon Ratatie 10 Oy | Real estate | 1987 |
| Sotkamon Sähkötekniikka Oy | Construction | 2000 |
| Sotkamon Taimisto Ky | Agriculture & fishing | 2017 |
| Sotkamon Taksikeskus Oy | Transport & logistics | 1994 |
| Sotkamon Tietokeskus Ky | Wholesale & retail | 1998 |
| Sotkamon Urku-Kalevi Oy | Manufacturing | 2021 |
| Sotkamon Urkurakentajat Oy | Manufacturing | 1994 |
| Sotkamon Varaosa Oy | Wholesale & retail | 1992 |
| Sotkamon Yrityspalvelut Oy | Professional & scientific | 1991 |
| Sotkamon huoltopalvelut Oy | Administrative & support | 2022 |
| Sotkamopizza Hämäläinen & Laatikainen | Hospitality | 2008 |