| Hammers Harem Ans | Arts & recreation | 2007 |
| Hammersmark Invest AS | | 2006 |
| Hammersmark Olden Design AS | Professional & scientific | 2007 |
| Hammersound Productions AS | Arts & recreation | 2020 |
| Hamnegata 45 AS | Real estate | 2023 |
| Hamobar AS | Hospitality | 2026 |
| Hamstad Media AS | Information & communication | 2017 |
| Hamø Eiendom AS | Real estate | 2013 |
| Han Her AS | | 2024 |
| Hana Eiendom AS | Real estate | 1971 |
| Handberg Invest AS | Real estate | 1998 |
| Handelsbygg Hommelvik AS | Real estate | 2021 |
| Handelsbygg Hommelvik Invest AS | Real estate | 2025 |
| Handelshuset Rjukan AS | Real estate | 1990 |
| Handmalt Porselen & Glass AS | Wholesale & retail | 2016 |
| Hands on History AS | Information & communication | 2016 |
| Handsafe AS | Wholesale & retail | 2006 |
| Handyman Kjerkol AS | Construction | 2025 |
| Haneseth Simcon Elektro AS | Construction | 2020 |
| Hangaren Lade AS | Real estate | 2003 |
| Hank Sport AS | Wholesale & retail | 1973 |
| Hanken Holding AS | Real estate | 2007 |
| Hanmo AS | Manufacturing | 1963 |
| Hannah AS | | 2017 |
| Hanne Gjestad AS | Wholesale & retail | 1993 |
| Hannes Frisører AS | Other services | 1986 |
| Hano Media AS | Professional & scientific | 2021 |
| Hans Finnes Gate 3 AS | Real estate | 2019 |
| Hans Finnes GT 24 AS | Real estate | 1947 |
| Hans Finnes GT 4 AS | Real estate | 2013 |
| Hans Hagerups Gate 8 AS | Real estate | 2020 |
| Hans K Finnanger AS | Wholesale & retail | 2020 |
| Hans Martin Invest AS | Financial services | 2005 |
| Hans Og Hennes Hårsenter Da | Other services | 2000 |
| Hans Torp Holding AS | | 2019 |
| Hansodden Holding AS | Construction | 2019 |
| Hanson Invest AS | | 2020 |
| Hape Holding AS | | 2021 |
| Happy Homes Norge AS | Administrative & support | 1993 |
| Happy Knitting AS | Wholesale & retail | 2015 |
| Happymum AS | Wholesale & retail | 2015 |
| Happytime Holding AS | | 2019 |
| Harald Stendal AS | Arts & recreation | 2008 |
| Harald Værnes AS | Real estate | 2002 |
| HARALDB3 AS | Real estate | 2026 |
| Haralds Holding AS | | 2020 |
| Haralds Selskapsmat AS | Hospitality | 2021 |
| Hardangerfrukt AS | Real estate | 1937 |
| Hardhaus Solutions AS | | 2024 |
| Hardnakke Invest AS | Real estate | 2019 |
| Hardraada Investments AS | | 2020 |
| Hardrock AS | Wholesale & retail | 2013 |
| Harestua Eiendom AS | Real estate | 2007 |
| Haringco AS | Administrative & support | 2000 |
| Harmankaya Transport AS | Transport & logistics | 2023 |
| Harmoni Kapital AS | Real estate | 2022 |
| Harmonium Invest AS | Health & social care | 2009 |
| Hartmann Prosjektrådgivning AS | Professional & scientific | 2010 |
| Hasl Holding AS | Wholesale & retail | 2019 |
| Hasselhaug AS | Professional & scientific | 2015 |
| Hasselø Holding AS | | 2022 |
| Haste AS | Information & communication | 2019 |
| Hastejobber AS | Administrative & support | 2024 |
| Hasvold Adam Holding AS | | 2024 |
| Hateca AS | Real estate | 2004 |
| Hatlebrekke Invest AS | Financial services | 2010 |
| Hatling AS | Real estate | 1987 |
| Hatling Invest AS | | 2019 |
| Hatmyr Holding AS | Administrative & support | 2016 |
| Hattrem Trafikkskole AS | Education | 1979 |
| Haug Holding AS | Professional & scientific | 2002 |
| Haug Kai 24 AS | Real estate | 1967 |
| Haugen Eiendom AS | Real estate | 1991 |
| Haugen Installasjon AS | Construction | 2009 |
| Haugenstua Holding AS | | 2025 |
| Haugfoss Holding AS | Real estate | 2005 |
| Haugnessvingen 15 AS | Real estate | 2025 |
| Haugnessvingen Familiebarnehage AS | Education | 2023 |
| Haugsboe Holding AS | | 2023 |
| Haugstua Invest AS | Financial services | 2005 |
| Haukaas Statsallmenning | Other services | 1885 |
| Haukberget AS | Real estate | 2018 |
| Hav & Gård AS | Agriculture & fishing | 2025 |
| Havbrua AS | Professional & scientific | 2016 |
| Havbruksconsult AS | Agriculture & fishing | 2007 |
| Havebyen Eiendom AS | Real estate | 2016 |
| Havicode AS | Information & communication | 2026 |
| Havlaks AS | Agriculture & fishing | 2025 |
| Havnegaten Eiendom AS | Real estate | 2006 |
| Havsport AS | Education | 2023 |
| Havsport Service AS | Education | 2016 |
| Havstein AS | | 2024 |
| Havstein Gård AS | Real estate | 2006 |
| Havstein Gård II AS | Real estate | 2008 |
| Havstein Legesenter AS | Health & social care | 1993 |
| Havstein Vestre Ltd Nuf | Arts & recreation | 2009 |
| Hawksnest AS | | 2019 |
| Hawq AS | Information & communication | 2024 |
| Hays AS | | 2025 |
| HBM Service AS | Wholesale & retail | 2017 |