| Foliegrossisten AS | Wholesale & retail | 2025 |
| Folkets Hus Brumunddal SA | Real estate | 1922 |
| Fram Panorama AS | Real estate | 2024 |
| Framheim Da | Real estate | 2006 |
| Frank Bygg Holding AS | Construction | 2015 |
| Fredland Eiendom AS | Real estate | 2023 |
| Friarfjord Transport AS | Transport & logistics | 2016 |
| Frich's Hotel Og Spiseri Brumunddal AS | Hospitality | 2017 |
| Frisikt Øst AS | Professional & scientific | 2002 |
| Frode Skogli Holding AS | | 2025 |
| Full Send AS | Arts & recreation | 2025 |
| Furnes Ski & Sport AS | Wholesale & retail | 1991 |
| Fysioterapi Brumunddal AS | Health & social care | 2011 |
| G3 Komponent AS | Manufacturing | 2020 |
| Gaima AS | Professional & scientific | 2022 |
| Gammelgata 1 AS | Real estate | 2026 |
| Gards Glede AS | Agriculture & fishing | 2025 |
| Gaupen Holding AS | Construction | 1990 |
| Gaupen Invest AS | Real estate | 2021 |
| GBD Classic Cars AS | Wholesale & retail | 2024 |
| Geir Nysveen Holding AS | Administrative & support | 2014 |
| Geit AS | | 2024 |
| Geitmyra Ringsaker Matkultursenter for Barn AS | Health & social care | 2017 |
| Gest AS | Wholesale & retail | 2009 |
| Getgo AS | Wholesale & retail | 2022 |
| Gewi Invest AS | | 2020 |
| Gilberg Engros Menypartner AS | Wholesale & retail | 2013 |
| Gilberg Holding AS | Real estate | 2013 |
| Giv Invest AS | Professional & scientific | 2021 |
| Glitch Studios AS | Information & communication | 2016 |
| Glueplant Games AS | Manufacturing | 2025 |
| Godterigubben AS | Wholesale & retail | 1998 |
| Good Workaround AS | | 2021 |
| Grab AS | Information & communication | 2013 |
| Granberg Bygg AS | Construction | 2025 |
| Gravferdsbyråene AS | Other services | 1973 |
| Green Fuels AS | Wholesale & retail | 2004 |
| Grindalsvegen 8 AS | Real estate | 2018 |
| Grini Holding AS | Construction | 2010 |
| Grini Rør AS | Construction | 2021 |
| Grønne Bygg AS | Real estate | 2017 |
| Grønvold Invest AS | Real estate | 2020 |
| Grønvolds Bildemontering AS | Wholesale & retail | 2020 |
| Grønvolds Eiendom AS | Real estate | 2023 |
| Grønvolds Karosseriverksted Ans | Other services | 1991 |
| GT Eiendomsinvestering AS | Real estate | 2021 |
| Gustav Thorsrud Holding AS | Construction | 2013 |
| GVD Holding AS | Construction | 2022 |
| Gvidan Eiendom AS | Construction | 2023 |
| Gymeq Nordic AS | Manufacturing | 2014 |
| H Sønes Urmaker Optiker AS | Wholesale & retail | 1995 |
| H-T Eiendom AS | Real estate | 2006 |
| Haavin AS | Financial services | 2005 |
| Habiqo AS | Construction | 2007 |
| Hagastua Jord Og Skog Da | Administrative & support | 2020 |
| Hagen VVS Og Klima AS | Construction | 2024 |
| Hamarr AS | | 2018 |
| Handlenor AS | Wholesale & retail | 2021 |
| Hasmo AS | Transport & logistics | 2024 |
| Hattori Hanzo Invest AS | Professional & scientific | 2022 |
| Haug Gård Da | Agriculture & fishing | 2025 |
| Haugens Bilservice AS | Other services | 1996 |
| Haugli Holding AS | | 2018 |
| Haugli Invest AS | | 2021 |
| Haukaas Invest AS | Real estate | 2005 |
| Havi Utvikling AS | Real estate | 2025 |
| Haviks-Energi AS | Wholesale & retail | 2022 |
| Havna Drift AS | Hospitality | 1941 |
| HB Property AS | Real estate | 2007 |
| HBK Gruppen AS | Construction | 2023 |
| HBS Holding AS | Construction | 2005 |
| HCB Eiendom & Bygg AS | Real estate | 2025 |
| Hedmark Balkongsystemer AS | Construction | 1999 |
| Hedmarken Hestesenter AS | Education | 2016 |
| Hedmarken Sandblåserservice AS | Manufacturing | 2014 |
| Hedmarksvidda Husky AS | Arts & recreation | 2018 |
| Heidi's Carfashion AS | Other services | 2022 |
| Heidnir Print AS | Professional & scientific | 2019 |
| Helena Susanne Invest AS | | 2025 |
| Helgøya Sølvsmie AS | Wholesale & retail | 2013 |
| Helleberget SA | Real estate | 2014 |
| Helsø Holding AS | Manufacturing | 2023 |
| Helt Magisk AS | Construction | 2017 |
| Hemsedalvegen 2520 AS | Real estate | 2026 |
| Heneti-Service AS | Professional & scientific | 2015 |
| Henrik Bakken AS | Transport & logistics | 2025 |
| Hevea Eiendom AS | Real estate | 1997 |
| HG Kapital AS | | 2023 |
| Hjelperiet AS | Professional & scientific | 2019 |
| Hodling AS | Professional & scientific | 2026 |
| Holmvik Holding AS | Other services | 2007 |
| Holmvik Power AS | | 2025 |
| Honne Hotell Holding AS | Real estate | 2022 |
| Honning-Huset AS | Real estate | 2020 |
| Hornsgate 7 AS | Real estate | 2016 |
| Hornsgate 7 Holding AS | Real estate | 2023 |
| Hornsgate 7 HOLDING2 AS | Real estate | 2025 |
| Houmb Nedre Samdrift Da | Agriculture & fishing | 2004 |
| Huma Group AS | Professional & scientific | 2025 |
| Hundegården AS | Wholesale & retail | 2013 |