| Hakeda Eiendom AS | Real estate | 2004 |
| Halving AS | | 2018 |
| Hanad AS | Information & communication | 2022 |
| Hansen & Næss AS | Wholesale & retail | 2015 |
| Harvest-Holding AS | Financial services | 2007 |
| Hasla 585 Holding AS | | 2023 |
| Hattemaker Holding AS | | 2022 |
| Hauggata 2 Lena AS | Real estate | 2021 |
| Haugom-Invest AS | | 2025 |
| HBF Holding AS | Real estate | 2011 |
| Hbi AS | | 2017 |
| Hcø Holding AS | Health & social care | 2005 |
| Hegre Engineering AS | Professional & scientific | 2023 |
| Heim Gjøvik AS | Hospitality | 2017 |
| Heimdahl & Partnere AS | Real estate | 2017 |
| Heimdahl & Partnere Holding AS | Real estate | 2019 |
| Hek Utvikling AS | Real estate | 2016 |
| Helium Holding AS | Financial services | 2005 |
| Heme AS | Real estate | 2015 |
| Henrik Elje Revling Holding AS | Financial services | 2012 |
| Henrik Hvattum Holding AS | Financial services | 2016 |
| Henriksveen Invest AS | | 2018 |
| Hento AS | Real estate | 2021 |
| Heritage 4 AS | Hospitality | 2016 |
| Hesto Invest AS | | 2018 |
| Hexe AS | Real estate | 2011 |
| Him Invest AS | | 2021 |
| Hio Anlegg AS | Construction | 2018 |
| Hjelleset AS | Transport & logistics | 2012 |
| HMK Service AS | Real estate | 2019 |
| Hnsinvest AS | Real estate | 2005 |
| Hobbit Holding AS | Real estate | 2017 |
| Hodlingselskap AS | | 2021 |
| Hoff Bil AS | Other services | 1989 |
| Hoff SA | Manufacturing | 1982 |
| Holmgården AS | Real estate | 2022 |
| Holte Bygg AS | Construction | 2006 |
| Home Academy AS | Education | 2016 |
| Houggården AS | Real estate | 2005 |
| Hov Utvikling AS | Real estate | 2015 |
| Hovdetoppen AS | Real estate | 2015 |
| Hovdetoppen Bolig AS | Professional & scientific | 2019 |
| Hovdetoppen Næring AS | Real estate | 2019 |
| Hovdetoppen Utvikling AS | Real estate | 2006 |
| HP Entreprenør AS | Real estate | 2025 |
| HR Eidsiva AS | Real estate | 2005 |
| HSH Invest AS | Real estate | 2013 |
| Htec AS | Manufacturing | 2015 |
| Hudklinikkene AS | Other services | 2020 |
| Hulebakveien 88 AS | Real estate | 2025 |
| Hultmann Holding AS | Real estate | 2012 |
| Hultmann Invest AS | Construction | 2019 |
| Hundetrenerline AS | Education | 2023 |
| Hundremeterskogen Barnehage Gjøvik SA | Education | 2000 |
| Hunndalen Invest AS | | 2021 |
| Hunnsveien 1 AS | Real estate | 2005 |
| Hunnsveien 3 AS | Real estate | 2020 |
| Hunter Douglas Holding Norge AS | Manufacturing | 2014 |
| Hunter Douglas Norge AS | Manufacturing | 1996 |
| Hunton Fiber AS | Manufacturing | 1992 |
| Hunton Næringspark AS | Real estate | 2016 |
| Huntonstranda 3-5 AS | Real estate | 2005 |
| Hus 1 AS | Real estate | 1999 |
| Husfliden Gjøvik AS | Wholesale & retail | 2013 |
| Husteli Holding AS | Financial services | 2017 |
| Husø Apotek AS | Wholesale & retail | 2023 |
| HV7 Eiendom AS | Real estate | 2025 |
| Hveem Invest AS | Real estate | 1991 |
| Hvittråd AS | Wholesale & retail | 2010 |
| Hygge Gjøvik AS | Hospitality | 2019 |
| Hygge Storhamar AS | Hospitality | 2019 |
| Hyttepartner AS | Professional & scientific | 2017 |
| Håkon Lysen Holding AS | Financial services | 2016 |
| Håndverksharmoni Da | Construction | 2024 |
| Hårsenteret Gjøvik AS | Other services | 2009 |
| Håvard Schjørlien AS | | 2021 |
| Høste Holding AS | | 2024 |
| Høyskolen for Yrkesfag AS | Education | 2015 |
| I. L. Hvalby Holding AS | Health & social care | 2021 |
| Ibsen Iris AS | Health & social care | 2025 |
| Ichi Uchu AS | Hospitality | 2024 |
| Ide Og Produkt AS | Professional & scientific | 2020 |
| Ifus AS | Education | 2020 |
| Ihler Holding AS | | 2026 |
| Ihler Tech AS | Information & communication | 2026 |
| Ill AS | Administrative & support | 2023 |
| In Sight Games Da | Wholesale & retail | 2005 |
| Indian Sangam Restaurant AS | Hospitality | 2026 |
| Industribygg Eiendomsutvikling AS | Real estate | 2017 |
| Industribygg Gjøvik AS | Real estate | 2017 |
| Industribygg Næring AS | Real estate | 1968 |
| Industrigata 60 Lillehammer AS | Real estate | 2020 |
| Industripakking AS | Professional & scientific | 2005 |
| Industriveien 17 AS | Real estate | 2000 |
| Infill Bygg AS | Real estate | 2022 |
| Infra Bil AS | Wholesale & retail | 2021 |
| Inge Invest AS | | 2022 |
| Inge Trettsveen AS | Agriculture & fishing | 2013 |
| Ingunn a. Lønstad AS | Financial services | 2018 |
| Init Ans | Professional & scientific | 1994 |