| Kjølhaug Holding AS | Financial services | 2008 |
| KNS AS | Professional & scientific | 2025 |
| KNS Consulting AS | Professional & scientific | 2025 |
| Konsulent Mikkelsen AS | Professional & scientific | 2023 |
| Kontorbygg AS | Real estate | 1983 |
| Kvebergsvangveien SA | Real estate | 1956 |
| Kvislåtjønna Beitelag SA | Agriculture & fishing | 1947 |
| Kvitstenhøa Beitelag SA | Agriculture & fishing | 1978 |
| Langleite Begravelsesbyrå AS | Other services | 2023 |
| Leif Sturla Lillestrøm Maskin Og Transport AS | Transport & logistics | 2013 |
| Lisbeth L Gjermundshaug AS | Professional & scientific | 2025 |
| Lise Stenhaug Transport AS | Transport & logistics | 2013 |
| LLG Holding AS | Financial services | 2018 |
| Lomsjødalsveien Veilag SA | Real estate | 1956 |
| Luna Fiskeri Invest Limited Nuf | | 2025 |
| M.Sørhus Holding AS | Real estate | 2022 |
| Maling Og Snekkerservice AS | Construction | 2026 |
| Måna-Steivanglia-Hamndalen Veianlegg | Real estate | 1972 |
| Naustervola Utmarkslag SA | Real estate | 2022 |
| Nemi Eiendomsutvikling AS | Real estate | 2017 |
| Neo Folgerø AS | Manufacturing | 2012 |
| Neslund AS | Education | 2011 |
| Neslund Holding AS | Education | 2023 |
| Nonny Thai Import AS | Wholesale & retail | 2025 |
| Nonny Thai Take Away AS | Hospitality | 2025 |
| Nord-Østerdal Elektroservice AS | Construction | 1985 |
| Norske Garn AS | Wholesale & retail | 2017 |
| Nye Thai Smile Take Away AS | Hospitality | 2017 |
| Nørdsti Musikk AS | Arts & recreation | 2002 |
| P.E. Lillestrøm Holding AS | Transport & logistics | 2021 |
| Paureng Eiendom AS | Transport & logistics | 1992 |
| Pinemoor Consulting AS | Professional & scientific | 2025 |
| Piperudstien Holding AS | Wholesale & retail | 2005 |
| Plassen Maskinlag SA | Agriculture & fishing | 2012 |
| Plassmoen 97 AS | Real estate | 2024 |
| Reidar M Måna Eiendom AS | Real estate | 2003 |
| Reidar M Måna Servicesenter AS | Wholesale & retail | 2000 |
| Ren Vask Og Miljøinnredning AS | Administrative & support | 2014 |
| Rørleggermester Olav Tellebon AS | Construction | 2013 |
| Rørleggermester Olav Tellebon AS | Construction | 2026 |
| S Tronsli Bil & Karosseri AS | Other services | 1989 |
| S. Lillestrøm AS | Mining & quarrying | 2007 |
| Salboheds AS | Construction | 2025 |
| Sandtrøa Frisør Og Fotpleie AS | Other services | 2020 |
| Sans Blomster Alvdal AS | Wholesale & retail | 2006 |
| Selmina Invest AS | | 2025 |
| Skredderhaug Holding AS | Financial services | 2015 |
| Smed Og Hovslager Skoglund AS | Agriculture & fishing | 2016 |
| Smedplassen Da | Agriculture & fishing | 2016 |
| Snøhetta Regnskap Alvdal Folldal AS | Professional & scientific | 2021 |
| Solhellinga Boliggrend AS | Real estate | 2018 |
| Steia Eiendom AS | Real estate | 2010 |
| Steien Hotel AS | Hospitality | 2019 |
| Steihaug Invest AS | | 2023 |
| Steimoen Samdrift Da | Agriculture & fishing | 2005 |
| Strømmen Vannverk SA | Water & waste | 1956 |
| Studio O AS | Information & communication | 2016 |
| Svaneti Backcountry AS | Administrative & support | 2013 |
| Svartbekkjølen Utmarkslag SA | Administrative & support | 2023 |
| Svein Helges Holding AS | Real estate | 2013 |
| Sætersmoen Holding AS | | 2023 |
| Søberg Gård AS | Manufacturing | 1985 |
| Sølendalsvegen SA | Real estate | 2014 |
| Tangen Gård Ans | Agriculture & fishing | 1996 |
| Tannåneset Anlegg AS | Construction | 2022 |
| Tannåneset Maskin AS | Construction | 2018 |
| Taverna Eiendom AS | Real estate | 2016 |
| Tharaldsteen AS | Real estate | 1979 |
| Thomas Theodor AS | Wholesale & retail | 2026 |
| TNM Transport AS | Transport & logistics | 2024 |
| Total Helse Norge AS | Administrative & support | 2004 |
| Trefiber'N AS | Construction | 2019 |
| Tronfjell Eiendom AS | Real estate | 2014 |
| Tronfjell Fredsuniversitet Eiendom AS | Real estate | 2010 |
| Tronfjell Maskin AS | Construction | 2014 |
| Tronkjølen Jaktfelt SA | Real estate | 1954 |
| Tronsligarasjen AS | Real estate | 2025 |
| Tronsligarasjen Invest AS | | 2025 |
| Tronsvangen Seter Drift AS | Real estate | 2015 |
| Trontv AS | Information & communication | 2021 |
| Tveråen Skogsdrift AS | Agriculture & fishing | 2015 |
| Urlia Utmarkslag | Real estate | 1998 |
| Urørt Ski Og Sykkeleventyr AS | Administrative & support | 2018 |
| Valråmoen-Dølbekken-Kvislå Veilag SA | Real estate | 2016 |
| Viltstellområde 4 SA | Real estate | 2021 |
| Wood Seaways AS | Wholesale & retail | 2021 |
| Øien Kran & Transport AS | Transport & logistics | 2023 |
| Økt Eiendom AS | Real estate | 2023 |
| Østbygården AS | Real estate | 2004 |
| Østbymor Holding AS | Wholesale & retail | 2023 |
| Østerdal Miljø AS | Water & waste | 2025 |
| Østerdal Tre AS | Manufacturing | 2015 |
| Østerdalsterminalen AS | Real estate | 2023 |
| Østkjølen SA | Real estate | 2022 |
| Øygardene Vassverk SA | Water & waste | 2022 |