| Hageveien 4 Holding AS | Real estate | 2005 |
| Hair Agentur AS | Wholesale & retail | 2016 |
| Hair D'Sign AS | Other services | 2014 |
| Hali Pet Drift AS | Wholesale & retail | 2017 |
| Hali Pet Holding AS | Wholesale & retail | 2016 |
| Hallberg Løkken Holding AS | | 2025 |
| Hamamø AS | | 2025 |
| Hamarvegen Holding AS | Real estate | 2021 |
| Hammerlund Askvoll & Haugrud AS | Manufacturing | 1960 |
| Hammermo Fus Barnehage AS | Education | 2018 |
| Hammerseng Holding AS | Education | 2020 |
| Handelens Og Håndverkets Hus AS | Real estate | 1941 |
| Hany Invest AS | | 2020 |
| Hasund Capital AS | Real estate | 2016 |
| Hatlestad Karlsen Psykologtjenester AS | Health & social care | 2022 |
| Hauben AS | Real estate | 2025 |
| Haug Og Ruud AS | Construction | 2013 |
| Haug Og Ruud VVS AS | Construction | 2014 |
| Haugen & Sønn Mekaniske AS | Manufacturing | 2025 |
| Haugen&Lien Invest AS | Real estate | 2022 |
| Haugligården AS | Real estate | 2017 |
| Hawk Cultural Consulting AS | Arts & recreation | 2024 |
| Hba Holding AS | | 2018 |
| Hba Investment AS | | 2026 |
| HC Dahl AS | Wholesale & retail | 2003 |
| Heb Consulting AS | Professional & scientific | 1988 |
| Hegg Coaching AS | Education | 2026 |
| Heill AS | Professional & scientific | 2017 |
| Heim Lillehammer AS | Hospitality | 2012 |
| Heimfjell AS | | 2023 |
| Helge Aune AS | Wholesale & retail | 1979 |
| Helgesen Consult AS | Health & social care | 2006 |
| Hella Gutmann Solutions AS | Information & communication | 1989 |
| Hello & Tronics AS | Other services | 2025 |
| Hellvik Holding AS | Financial services | 2005 |
| Hellvik Hus Lillehammer AS | Real estate | 2017 |
| Helm Investments AS | | 2023 |
| Helsadi AS | Health & social care | 1997 |
| Helsebemanning AS | Administrative & support | 2010 |
| Hemsedal 365 AS | Professional & scientific | 2017 |
| Henjon Holding AS | | 2023 |
| Henna AS | Construction | 2021 |
| Henning Hansen Invest AS | Real estate | 2005 |
| Herlig Film Og TV AS | Information & communication | 2017 |
| Herman Meren AS | Financial services | 2014 |
| Herseth Holding AS | | 2021 |
| Hestehoven Barnehage SA | Education | 1985 |
| Hevens Consulting AS | Education | 2020 |
| Hjertespråket AS | Health & social care | 2018 |
| Hjørnet Mat AS | Wholesale & retail | 2022 |
| HM Byggservice AS | Construction | 2013 |
| HMM Invest AS | | 2025 |
| HMS Service Lillehammer Da | Education | 1998 |
| Hockeyconsulting AS | Arts & recreation | 2016 |
| Hoellibekken AS | | 2020 |
| Hol Invest AS | Real estate | 1977 |
| Holen Global Invest AS | | 2025 |
| Holen Global Invest Holding AS | | 2025 |
| Holms Bilpleie AS | Other services | 1998 |
| Holsbakkan AS | Real estate | 2023 |
| Holsbakkan Eiendom AS | Real estate | 2023 |
| Horn Consulting AS | Professional & scientific | 2014 |
| Hotel Hammer AS | Hospitality | 1991 |
| Hov Sameieskog Da | Administrative & support | 2005 |
| Hovemoen AS | Mining & quarrying | 2022 |
| Hovemoen Eiendom AS | Real estate | 1999 |
| Hovemoen Næringpark AS | Professional & scientific | 2019 |
| Hovemoen Og Johansen Kioskdrift Ans | Wholesale & retail | 1991 |
| Hovemovegen Eiendom AS | Real estate | 2024 |
| Hovesveen Eiendom AS | Real estate | 2006 |
| Hovslageren Fus Barnehage AS | Education | 2008 |
| HS Lillehammer AS | Construction | 2003 |
| HSB Invest AS | | 2021 |
| Hudlegekontoret Lillehammer AS | Health & social care | 2001 |
| Human Interaction AS | Professional & scientific | 2015 |
| Huseierlag I Blåklokkevegen SA | Real estate | 1981 |
| Husum Holding AS | Wholesale & retail | 2005 |
| Husum Motorsport AS | Other services | 2026 |
| Husumgruppen AS | Wholesale & retail | 2017 |
| Hvelvet Restaurant AS | Hospitality | 2014 |
| Hygge Lillehammer 1 AS | Hospitality | 2021 |
| Hyperscale AS | Information & communication | 2025 |
| Hyrrim AS | Wholesale & retail | 2024 |
| Hytten & Hansen Holding AS | Real estate | 2019 |
| Hytteprosjekt AS | | 1998 |
| Hårgaiden AS | Other services | 2000 |
| Håvemoen Holding AS | | 2025 |
| Høen AS | Financial services | 2008 |
| Høistad Bildeler AS | Wholesale & retail | 1999 |
| Hønsehuset Randgaard AS | Real estate | 2013 |
| Høstmælingen Juletreskog AS | Agriculture & fishing | 2019 |
| Iakta AS | Professional & scientific | 2020 |
| Iakta Proshop Golf & Snowgear AS | Wholesale & retail | 2010 |
| Iben AS | Wholesale & retail | 2022 |
| Id Tag Technology Group AS | Information & communication | 2011 |
| Id Tag Technology Invest AS | Information & communication | 2011 |
| Idun Meren AS | | 2021 |
| Ikomm AS | Information & communication | 2007 |
| Ildsjel AS | Agriculture & fishing | 2024 |
| Indieaner Invest AS | | 2013 |