| Aasen Bygg AS | Construction | 2016 |
| Ae Entreprenør AS | Real estate | 2021 |
| Agroøst AS | Wholesale & retail | 2012 |
| Arne Gjelten Grus AS | Mining & quarrying | 2010 |
| Arne Karlsen AS | Professional & scientific | 1984 |
| Besøkssenter Forollhogna Nasjonalpark AS | Administrative & support | 2025 |
| Bomveien Lademyren SA | Real estate | 2023 |
| Brødrene Holte AS | Real estate | 2016 |
| Brødrene Sønmør AS | Construction | 2009 |
| Feste Landskap Arkitektur Nordøst AS | Professional & scientific | 1992 |
| Fjellregionen Interkommunale Avfallsselskap AS | Water & waste | 1987 |
| Fjellurt Da | Wholesale & retail | 2016 |
| Fjellveien Veilag SA | Real estate | 2022 |
| FST Bygg AS | Construction | 2012 |
| FST Eiendom AS | Real estate | 2026 |
| Gode Ski AS | Other services | 2016 |
| Hackathon Norge AS | Information & communication | 2020 |
| Helgesbekken Vannverk SA | Water & waste | 1998 |
| Hodalen Disel Og Beredskapsanlegg | Wholesale & retail | 1995 |
| Hodalen Fjellstue SA | Hospitality | 1993 |
| Hodalen Grunneierlag | Real estate | 1995 |
| Hodalen Samdrift Da | Agriculture & fishing | 2008 |
| Hodalen Samdrift Eiendom Da | Real estate | 2020 |
| Hodalen Utmarkslag | Agriculture & fishing | 1994 |
| Hodalen Vannverk SA | Water & waste | 1964 |
| Holøydalen Diesel & Beredskapsanlegg SA | Wholesale & retail | 1985 |
| Hulbækmo Jacobsen Da | Arts & recreation | 1999 |
| Ingrafo AS | Professional & scientific | 2010 |
| Inlandic Events Co AS | Administrative & support | 2018 |
| Inntek AS | Professional & scientific | 2024 |
| Jensgården Eiendom AS | Real estate | 2024 |
| Johan Steen AS | Construction | 2002 |
| JR Servicepartner AS | Wholesale & retail | 2022 |
| Klettan/Bjønnkuven SA | Real estate | 2021 |
| Kroketbekken Hyttefelt AS | Real estate | 2019 |
| Kvennan Camping AS | Hospitality | 1985 |
| Kåsdalen Eiendom AS | Real estate | 2023 |
| Malmplassen AS | Hospitality | 2014 |
| Malmplassen Gjestegård Vorland Og Vorland Ans | Real estate | 1986 |
| Moan Bygg AS | Construction | 2017 |
| Moan Eiendom AS | Real estate | 2017 |
| Moan Holding 1 AS | Real estate | 2017 |
| Noproblemo AS | Arts & recreation | 2022 |
| Norbos - Dynamics AS | Wholesale & retail | 2025 |
| NT Ent. AS | Construction | 2014 |
| Olsen Kafe AS | Real estate | 2020 |
| PJG AS | Real estate | 2016 |
| Proffen Hytteservice Da | Administrative & support | 2005 |
| Rasmusan AS | Agriculture & fishing | 2014 |
| RR Event AS | Arts & recreation | 2022 |
| Rytek AS | Construction | 2021 |
| Rørosveien 1869 AS | Real estate | 2023 |
| S J Bakken Rør Og Anlegg AS | Construction | 2003 |
| Saxa Frisør AS | Other services | 2003 |
| Saxa Frisør Da | Other services | 1997 |
| Semmingsen Holding AS | Financial services | 2018 |
| Staur Fjellbakeri AS | Manufacturing | 2005 |
| Store Tallsjøen Grunneierlag SA | Agriculture & fishing | 2022 |
| TBT Prosjektering AS | Professional & scientific | 2022 |
| TEHANS1 AS | Professional & scientific | 2012 |
| Tolga 2020 AS | Professional & scientific | 2016 |
| Tolga Bensin & Service Drift AS | Wholesale & retail | 2020 |
| Tolga Bensin & Service Eiendom AS | Real estate | 2020 |
| Tolga Bil AS | Other services | 2016 |
| Tolga Bolig AS | Real estate | 2016 |
| Tolga Eiendom AS | Real estate | 2010 |
| Tolga Hjort AS | Manufacturing | 2016 |
| Tolga Hjort Da | Agriculture & fishing | 2016 |
| Tolga Kraft AS | Energy | 2021 |
| Tolga Næringspark AS | Real estate | 2009 |
| Tolga Prosjekt AS | Real estate | 2004 |
| Tolga Utmarkslag SA | Real estate | 1995 |
| Tolga Viltslakteri AS | Manufacturing | 2023 |
| Tolga-Os Sparebank | Financial services | 1865 |
| Tolga-Tynset Musikk AS | Wholesale & retail | 2013 |
| Tos Asvo AS | Health & social care | 1992 |
| Trangvik Maskin AS | Construction | 2005 |
| Troran AS | | 2019 |
| Trovil AS | | 2022 |
| Trøan Samdrift Da | Agriculture & fishing | 2006 |
| Urset Samdrift Da | Agriculture & fishing | 2006 |
| Velg Med Hjertet AS | Professional & scientific | 2018 |
| Vingelen Gravmonumenter AS | Manufacturing | 2015 |
| Årsak Fordel Konsekvens AS | Professional & scientific | 2002 |
| Østerdalsselskapet AS | Real estate | 2020 |
| Østfjellet SL Ans | Transport & logistics | 2014 |
| Øversjødalen Samfunnshus SA | Real estate | 1972 |
| Øversjødalen Utmarkslag Ba | Administrative & support | 1990 |
| Øversjødalen Viltstellområde SA | Real estate | 2002 |