| 1480 Raija Naumanen Oy | Wholesale & retail | 2016 |
| 1783 Katja Laaksonen Oy | Wholesale & retail | 2021 |
| AH-Rakenne Häyrinen Ky | Construction | 2006 |
| AL-Proservice Oy | Manufacturing | 2020 |
| Anmala Oy | Administrative & support | 2012 |
| Arkkitehtuuripiste ky Jorma Varanka | Professional & scientific | 1985 |
| Arto Karjalainen Ky | Hospitality | 2007 |
| Avoin yhtiö Posion Kukka ja Hautaustoimisto | Other services | 1981 |
| BEN-tarkastus Oy | Professional & scientific | 2014 |
| Circcon Oy | Water & waste | 2024 |
| DDK Lapland Oy | Hospitality | 2024 |
| Data-Wood Oy | Manufacturing | 1988 |
| EIP-Erauspojan Ihmepaikka Oy | Construction | 1999 |
| Elpocleaner Oy | Administrative & support | 1996 |
| En vittu tiiä Oy | Wholesale & retail | 2019 |
| Erkki Mourujärvi Oy | Agriculture & fishing | 1989 |
| Etappi Invest Oy | Real estate | 2026 |
| Goodset Oy | Wholesale & retail | 2006 |
| Hansaram Osk | Arts & recreation | 2019 |
| Himmerkinlahti Oy | Hospitality | 2000 |
| Hotelli-Ravintola Nuotta Ky | | 1985 |
| Huoltokorjaamo T. ja R. Säkkinen Oy | Wholesale & retail | 1988 |
| Ilkka Säkkinen Ky | Construction | 2006 |
| Ingan Tupa Avoin yhtiö | Hospitality | 2013 |
| J. Tuppurainen Oy | Transport & logistics | 2008 |
| J.Luksua Oy | Administrative & support | 2021 |
| JLP Group Oy | Professional & scientific | 2025 |
| Kamunen Ky | Other services | 1981 |
| Keijon Kone Ky | | 1986 |
| Kiinteistö Oy Kurtankaltio | Real estate | 1987 |
| Kirikeskus Oy | Hospitality | 2005 |
| Kirimajat Oy | Hospitality | 2006 |
| Kirindo Oy | Financial services | 2002 |
| Kitka Experience Ky | Administrative & support | 2003 |
| Kitka Holding Oy | Other services | 2022 |
| Kitkan Sähkö Ky | Construction | 1979 |
| Kitkarinne Oy | Agriculture & fishing | 2024 |
| Korocafé Ky | Hospitality | 2017 |
| Kotilammen Auto Ky | Other services | 1985 |
| Kotiposio Ky | Wholesale & retail | 1984 |
| Kuljetus Ruokamo Ky | Transport & logistics | 1995 |
| Kuljetus Saraniemet Oy | Transport & logistics | 2021 |
| Kuljetus-Ylitervo Ky | Transport & logistics | 1984 |
| Kuljetusliike Eero Posio Oy | Transport & logistics | 1992 |
| Kuusmoto Oy | Agriculture & fishing | 2014 |
| LKV-Posio Ky | Real estate | 2012 |
| Lapin Matkametsä Oy | Construction | 2017 |
| Lapin Meklarit Oy | Financial services | 2022 |
| Lapin Satu Ky | Administrative & support | 2011 |
| Lapland Tails Oy | Wholesale & retail | 2025 |
| Lauhkean Maanrakennus ja Konepalvelu Oy | Construction | 2024 |
| Livo Arctic Oy | Hospitality | 2019 |
| Livo Lakeside Oy | Hospitality | 2026 |
| Livojärven Matkailu oy | Hospitality | 2025 |
| Luonnonpuu Jukka Jurmu Ky | Wholesale & retail | 1999 |
| MK.Kim Ky | Manufacturing | 2012 |
| Maanrakennus J. Kulojärvi Ky | Construction | 2008 |
| Maasaari Ky | Construction | 1990 |
| Marikan Kotiapu Ky | Administrative & support | 2019 |
| Metsä-Mursu Oy | Agriculture & fishing | 1989 |
| Metsä-Ranta 2. Ky | Hospitality | 1991 |
| Monipalvelu Heikkala Avoin yhtiö | Administrative & support | 2009 |
| Naali Travel Oy | Hospitality | 2017 |
| Nuolikulma Oy | Agriculture & fishing | 2024 |
| O. Ahola Ky | Transport & logistics | 1983 |
| Oiva Kaivu Oy | Agriculture & fishing | 2014 |
| Oiva Soudunsaari Ky | Agriculture & fishing | 2016 |
| Osuuskunta KitkaNet | Information & communication | 2024 |
| Pentik Oy | Manufacturing | 1972 |
| Petri Lehtiniemi Oy | Wholesale & retail | 2011 |
| Pizzeria Posio avoin yhtiö | Hospitality | 2025 |
| PolarPosio Oy | Administrative & support | 2025 |
| Posio-Prodess Ky | Professional & scientific | 1980 |
| Posion Arkkuverhoomo Ky | Other services | 1996 |
| Posion Auto Oy | Wholesale & retail | 1989 |
| Posion Grilli-Tuote Ky | Hospitality | 1983 |
| Posion Hautauspalvelu Avoin yhtiö | Other services | 2018 |
| Posion Huonekalumyynti avoin yhtiö | Wholesale & retail | 1985 |
| Posion Jätehuolto Jouko Ahola Oy | Water & waste | 2023 |
| Posion Kaluste Ky | Manufacturing | 1983 |
| Posion Mökki- ja eräpalvelut Oy | Administrative & support | 2009 |
| Posion Pub Ky | Hospitality | 2009 |
| Posion Taika-asunnot Oy | Real estate | 2009 |
| Posion Taikapalvelut Oy | Real estate | 2020 |
| Posion Vesi ja Lämpö Oy | Water & waste | 1966 |
| Posioutdoors Oy | Administrative & support | 2019 |
| Putki- ja peltityö Vanhala Ky | Construction | 2003 |
| Puutyöliike Maikola Ky | Professional & scientific | 1978 |
| RakSa Moilanen oy | Construction | 2018 |
| Rakennuspalvelu Ollila Oy | Construction | 2017 |
| Ravintola Peikonpesä Oy | Hospitality | 2016 |
| Rukan metsä- ja kiinteistöpalvelu Ky | Administrative & support | 2017 |
| Satuvet oy | Professional & scientific | 2021 |
| Seppo Hirvonen Oy | Hospitality | 2019 |
| Seprin Ky | Wholesale & retail | 2016 |
| Small Estate OY | Real estate | 2023 |
| Star - Autosähkö ja pienkonekorjaamo Ky | Other services | 1990 |
| Suonnankylä-Hyväniemen vesiosuuskunta | Water & waste | 1993 |
| TEL Services Oy | Administrative & support | 2026 |
| Taivaanvalkiat Oy | Arts & recreation | 2025 |