| Fageråsen Hytteområde AS | Real estate | 1996 |
| Fageråsen Invest AS | Real estate | 2006 |
| Fageråsen Trysil Handel AS | Wholesale & retail | 2026 |
| Fagmøbler Trysil AS | Wholesale & retail | 2005 |
| Faldmo Og Sletmoe Mat AS | Wholesale & retail | 2014 |
| Feedyoursoul AS | Hospitality | 2026 |
| Fire Makroner AS | Manufacturing | 2020 |
| Fjell-Huskies Trysil AS | Arts & recreation | 2026 |
| Fjellbutikkene I Trysil AS | Real estate | 2005 |
| Fjellbygg Innlandet AS | Real estate | 2021 |
| Fjellfix Trysil AS | Administrative & support | 2025 |
| Fjellgutta AS | Administrative & support | 2011 |
| Fjellinvest Norge AS | Real estate | 2008 |
| Fjellmora Drift AS | Water & waste | 2021 |
| Fjellstua Kafé & Restaurant AS | Hospitality | 2026 |
| Fjelltaxi AS | Transport & logistics | 2024 |
| Flathagenlåven AS | Administrative & support | 2020 |
| Flendalen Sameieskog Ans | Agriculture & fishing | 1942 |
| Flendalen Snekkerservice AS | Construction | 2018 |
| Flendalen Viltstellområde SA | Agriculture & fishing | 1986 |
| Flermoen Utmarkslag SA | Administrative & support | 1977 |
| Fløterbåtfiske Ans | Transport & logistics | 2000 |
| FR Bygg Og Montasje AS | Construction | 2021 |
| Fundus AS | Real estate | 2006 |
| Fundus Eiendom AS | Administrative & support | 1996 |
| Galleri Vågal AS | Arts & recreation | 2021 |
| Gardbekkteig Ans | Agriculture & fishing | 1990 |
| Gardinhuset Ans | Wholesale & retail | 1998 |
| Gjertrud Sætres Bo Ans | Agriculture & fishing | 1935 |
| Gla'Snekkern AS | Construction | 2017 |
| Glad I Dekk AS | Wholesale & retail | 2020 |
| Glunot AS | Manufacturing | 2015 |
| Glåme AS | Professional & scientific | 2017 |
| GMN Invest AS | | 2026 |
| Grefsen Trafikkskole AS | Education | 2012 |
| Gromungen AS | Wholesale & retail | 2021 |
| Grøtbekklia AS | Information & communication | 2014 |
| Guarro AS | | 2026 |
| Gulløien Holding AS | Real estate | 2005 |
| H. Skei Holding AS | Manufacturing | 2012 |
| Hagebæk AS | Real estate | 2016 |
| Hallo Trysil AS | Arts & recreation | 2008 |
| Hartviksen Holding AS | Financial services | 2005 |
| Haru Invest AS | Administrative & support | 2020 |
| Hear Safe Norge AS | Wholesale & retail | 2016 |
| Heldaas Eiendom AS | Real estate | 2023 |
| Heldaas Holding AS | Real estate | 2022 |
| Helgestua AS | Real estate | 2006 |
| Hemstad AS | Construction | 2014 |
| Heron AS | Wholesale & retail | 2015 |
| Hevepa AS | Real estate | 2005 |
| Highbury Bistro AS | Hospitality | 2022 |
| Highbury Holding AS | Hospitality | 2010 |
| Highbury Hotelldrift AS | Hospitality | 2022 |
| Highbury Restaurantdrift AS | Hospitality | 2023 |
| Hjim Holding AS | Hospitality | 2005 |
| Hoel Marketing AS | Administrative & support | 2006 |
| Holding Åge AS | | 2024 |
| Holmsbu Infra AS | Administrative & support | 2020 |
| Holmsbu Resort AS | Real estate | 2020 |
| Holmseth AS | Administrative & support | 2023 |
| Holte Eiendom Ans | Real estate | 1991 |
| Hovli Invest AS | Wholesale & retail | 2015 |
| HSG AS | Real estate | 2007 |
| Hund Og Fritid Ans | Wholesale & retail | 1996 |
| Husets Cafe AS | Hospitality | 2023 |
| Husfliden Trysil Sentrum AS | Wholesale & retail | 2013 |
| Hytte Eiendomsforvaltning AS | Real estate | 2025 |
| Høgda Holding AS | | 2026 |
| Høgåsen AS | Mining & quarrying | 2003 |
| Højfjell Restauranger Ans | Hospitality | 2006 |
| Industriskinn AS | Manufacturing | 2013 |
| Innbygda Eiendom AS | Real estate | 2024 |
| Innbygda Invest AS | Real estate | 2023 |
| Interaktiv Kompetanse Ans | Education | 2008 |
| Ivancevic Holding AS | Professional & scientific | 2026 |
| J. Søgaard AS | Real estate | 2005 |
| Jeel Capital AS | | 2019 |
| JK Takst AS | Real estate | 2026 |
| Jocaje Medic AS | Health & social care | 2012 |
| Jolan Eiendom AS | Real estate | 2006 |
| Jon Sørby AS | Real estate | 2006 |
| JPS Utvikling AS | Financial services | 2016 |
| Jrs-Holding AS | | 2020 |
| Jrt-Holding AS | Financial services | 2016 |
| Juls Holding AS | Wholesale & retail | 2024 |
| Kaos Trysil AS | Real estate | 2016 |
| Kean AS | Real estate | 2011 |
| Kent Bakke Holding AS | | 2021 |
| Kent Wiklund Bygg & Målerientreprenad AB Nuf | Real estate | 2021 |
| Kerko Ans | Hospitality | 2011 |
| Klippen Prosjekt AS | Real estate | 2015 |
| Klåsa AS | Real estate | 1997 |
| Knettsetra AS | Hospitality | 1994 |
| Kort & Godt Mat AS | Manufacturing | 2013 |
| Kristoffer Lundberget AS | Agriculture & fishing | 2025 |
| Kroa Eiendom AS | Real estate | 2021 |
| Kvek Eiendom AS | Real estate | 2021 |
| La Taverna AS | Hospitality | 2025 |
| Laaven Holding AS | Hospitality | 2016 |