| GHJ Holding AS | Real estate | 2012 |
| Gjermshus Invest AS | Construction | 2006 |
| Glomma Montasje Service Da | Construction | 2025 |
| Glommengata 3 AS | Real estate | 2016 |
| Glåmdal Auto-Eiendom AS | Real estate | 2016 |
| Glåmdal Auto-Rep AS | Other services | 2013 |
| Glåmdal Autosalg AS | Wholesale & retail | 2020 |
| Glåmdal Bilco AS | Other services | 2022 |
| Glåmdal Catering Da | Hospitality | 2003 |
| Glåmdal Dyreklinikk AS | Professional & scientific | 2013 |
| Glåmdal Optikk AS | Wholesale & retail | 1994 |
| Glåmdal Personal Partner AS | Administrative & support | 2003 |
| Glåmdal Sjukepleie & Bandage AS | Wholesale & retail | 2006 |
| Glåmdalen AS | Information & communication | 1981 |
| Glåmdalen Taxi AS | Transport & logistics | 2024 |
| Glåmstad AS | Information & communication | 2009 |
| Gnist Media AS | Professional & scientific | 2023 |
| Godtone AS | Professional & scientific | 2019 |
| Gotteributikken Ans | Wholesale & retail | 1996 |
| GPS Bygg Og Montasje AS | Construction | 2025 |
| Grandiflora AS | Financial services | 2005 |
| Granlivegen 21 AS | Real estate | 2011 |
| Granlund Inneklima AS | Construction | 2021 |
| Graving Og Transportutleie AS | Construction | 2014 |
| Green Energy One AS | Financial services | 2012 |
| Grey Swan AS | | 2021 |
| Grinnemo Handel AS | Information & communication | 2015 |
| Grønn Bolig Kongsvinger AS | Real estate | 2018 |
| Gudbrandsdal Betongtransport AS | Transport & logistics | 2006 |
| Gullikstad Auto AS | Wholesale & retail | 2022 |
| Gunnar Holth Grusforretning AS | Mining & quarrying | 1970 |
| Guri Malla AS | Wholesale & retail | 2011 |
| Glåmdal Auto-Rep ANS | Other services | 1988 |
| Gågata Kongsvinger Drift AS | Real estate | 2000 |
| Gårdsdrift AS | Agriculture & fishing | 2023 |
| H Og H AS | Real estate | 2021 |
| Haakon Viis 4 AS | Real estate | 2025 |
| Hada AS | Health & social care | 1997 |
| Hage & Motor AS | Wholesale & retail | 2021 |
| Haget Rørleggerbedrift AS | Construction | 2005 |
| Hairport Bonnie & Clyde AS | Other services | 1995 |
| Hairport Gågata AS | Other services | 2001 |
| Hallonoruega! AS | Education | 2022 |
| Handelsbygg Stange AS | Real estate | 2011 |
| Handelsbygg Øst AS | Real estate | 2007 |
| Hauger Gruppen AS | Real estate | 2012 |
| Haugsjuvet Skog Ans | Agriculture & fishing | 1995 |
| Haugtussa AS | Professional & scientific | 2018 |
| HC Trafikkompetanse AS | Education | 2015 |
| HCM Eiendom AS | Real estate | 2018 |
| HD Maskinteknikk AS | Wholesale & retail | 2020 |
| Hedmark Service AS | Wholesale & retail | 1983 |
| Hedmur Eiendom AS | Real estate | 2011 |
| Heggeriset AS | Transport & logistics | 2021 |
| Heggeriset Lastebiltransport AS | Transport & logistics | 2021 |
| Hegh Eiendom AS | Real estate | 2016 |
| Helge Klyve Invest AS | Construction | 2023 |
| Helhetlig Ledelse AS | Professional & scientific | 2025 |
| Helsekonsult AS | Health & social care | 2004 |
| Hem Invest Holding AS | | 2024 |
| Hernesmoen Eiendom AS | Real estate | 2022 |
| Hexum AS | Information & communication | 2003 |
| HGB Betong Eiendom AS | Real estate | 2023 |
| Hildes Mathus Ans | Wholesale & retail | 1988 |
| Hilos AS | Health & social care | 2005 |
| Hint Invest AS | Real estate | 2021 |
| Hjertebarn AS | Wholesale & retail | 2022 |
| Hjulbeint AS | Wholesale & retail | 2023 |
| Holmberg Bråthen Holding AS | Wholesale & retail | 2013 |
| HPL Project Consulting AS | Professional & scientific | 2015 |
| Hudcenter Holding AS | Health & social care | 2020 |
| Hvam Nordre AS | Real estate | 1995 |
| Hvam Næringsutvikling AS | Real estate | 1998 |
| Hårfin Kongsvinger AS | Other services | 2011 |
| Høgskolebygget AS | Real estate | 2015 |
| Høgskolen Eiendom AS | Real estate | 2015 |
| Høiden Eiendom AS | Real estate | 1985 |
| I. Larsen AS | Professional & scientific | 2004 |
| Ibas Ontrack AS | Information & communication | 1978 |
| Icon Group AS | Information & communication | 2012 |
| Icon Live AS | Professional & scientific | 2012 |
| Icon Recordings AS | Information & communication | 2012 |
| Ifv 3 AS | Real estate | 2020 |
| Ihv AS | | 2018 |
| Ildervegen 10 AS | Real estate | 2019 |
| Imma AS | Wholesale & retail | 2025 |
| Imn Holding AS | Real estate | 2016 |
| Industrivarme AS | Energy | 2024 |
| Industriveien 47 Eiendom AS | Real estate | 2006 |
| Industriveien 49 Eiendom AS | Real estate | 2007 |
| Industriveien 65 AS | Real estate | 1996 |
| Industry Tools AS | Wholesale & retail | 2025 |
| Infoconsult Publishing AS | Professional & scientific | 1990 |
| Infrastrukt AS | Professional & scientific | 2013 |
| Inge Nordnes AS | Financial services | 2015 |
| Ingeniør Bjørn Rotheim AS | Professional & scientific | 2006 |
| Innlandet Anleggsdrift AS | Construction | 2023 |
| Innlandet Dental AS | Manufacturing | 2018 |
| Innlandet Geoteknikk AS | Professional & scientific | 2020 |
| Instek AS | Other services | 1988 |