| Harbitz Service AS | Real estate | 2019 |
| Harbitz Torg AS | Real estate | 1991 |
| Harbitz Torg Bad AS | Education | 2020 |
| Harbitz Torg Barnehage AS | Real estate | 2016 |
| Harbitz Torg Handel AS | Real estate | 2016 |
| Harbitz Torg Parkering AS | Real estate | 2016 |
| Harbitz Utleiebolig AS | Real estate | 2019 |
| Harbitzalleen Legesenter AS | Health & social care | 1994 |
| Harbitzalléen 2A Utvikling AS | Real estate | 2015 |
| Harbitzalléen Bolig AS | Real estate | 2014 |
| Harbitzkvartalene Utvikling AS | Real estate | 2025 |
| Harbo AS | | 2023 |
| Harbour AS | | 2024 |
| Harboweb AS | Information & communication | 2026 |
| Hard Work AS | Professional & scientific | 2015 |
| Hardangerjøkulen AS | Real estate | 1990 |
| Hardarheim Trading AS | Financial services | 2004 |
| Hardeep Imports Da | Wholesale & retail | 2003 |
| Hardersen Holding AS | | 2022 |
| Harding Invest AS | Professional & scientific | 2004 |
| Hardkokt Catering AS | Hospitality | 2014 |
| Hardly Working AS | Information & communication | 2017 |
| Hardmax AS | Information & communication | 2025 |
| Hardov AS | | 2020 |
| Hardrada AS | Professional & scientific | 2026 |
| Hardtarbeidende Kapital AS | | 2021 |
| Hardvare Labs AS | Information & communication | 2026 |
| Harebakken Mat AS | Wholesale & retail | 2026 |
| Harehopp AS | Real estate | 2021 |
| Hareide Consulting AS | Real estate | 2020 |
| Harelabb AS | | 2005 |
| Harepus AS | Real estate | 2022 |
| Harestua Handelsbygg AS | Real estate | 2020 |
| Harewood AS | Information & communication | 2025 |
| Hareåsen Holding AS | | 2024 |
| Harha Invest AS | | 2021 |
| Harildstad AS | Administrative & support | 2011 |
| Harish Holding AS | Financial services | 2015 |
| Harja Holding AS | Financial services | 2005 |
| Harjap Dagligvarer AS | Wholesale & retail | 2023 |
| Harjo Holding AS | | 2021 |
| Hark AS | Professional & scientific | 2016 |
| Hark Technologies AS | Professional & scientific | 2016 |
| Harka Holding AS | Financial services | 2005 |
| Harkestad Holding AS | Real estate | 2016 |
| Harket Holding AS | | 2025 |
| Harlem Food AS | Wholesale & retail | 2024 |
| Harlem Food Holding AS | Wholesale & retail | 2024 |
| Harlem Holding AS | | 2026 |
| Harlem Invest AS | | 2020 |
| Harlem Jacobsen Holding AS | | 2025 |
| Harlem Media AS | Arts & recreation | 2023 |
| Harlem No AS | Real estate | 1983 |
| Harlov AS | | 2024 |
| Harma AS | Wholesale & retail | 2017 |
| Harma Holding AS | Real estate | 2005 |
| Harmless Da | Wholesale & retail | 2001 |
| Harmohni AS | Financial services | 2013 |
| Harmona AS | Health & social care | 1988 |
| Harmoni Regnskap AS | Professional & scientific | 2025 |
| Harmonika AS | | 2019 |
| Harnang AS | | 2024 |
| Harold Tellez Sivilarkitekter AS | Professional & scientific | 2025 |
| Haroni Holding AS | | 2026 |
| Haroon Holding AS | | 2026 |
| Harpart AS | | 2018 |
| Harper Holding AS | | 2021 |
| Harpunveien 2 - 4 AS | Real estate | 2005 |
| Harpunveien 8 AS | Real estate | 2019 |
| Harris Eiendom AS | Health & social care | 2018 |
| Harris Holdings AS | | 2025 |
| Harry & Henry Ans | Wholesale & retail | 1998 |
| Harry AS | Professional & scientific | 2020 |
| Harry Martinsen AS | Construction | 1960 |
| Harstad Datasenter AS | Information & communication | 2013 |
| Harstad Etatbygg AS | Real estate | 2021 |
| Harstad Handelseiendom AS | Real estate | 2018 |
| Hartek AS | Professional & scientific | 2018 |
| Hartevasstjønn Kraft AS | Energy | 2025 |
| Hartford Capital AS | | 2017 |
| Harting AS | Wholesale & retail | 1983 |
| Hartley Ventures AS | Professional & scientific | 2024 |
| Hartlino AS | Wholesale & retail | 2018 |
| Hartmann Fine Wines AS | Wholesale & retail | 2011 |
| Hartmann Holding AS | Financial services | 2018 |
| Hartmann Holdings AS | | 2024 |
| Hartmann Invest AS | Real estate | 2019 |
| Hartmanns Norge AS | Professional & scientific | 2015 |
| Hartmark Executive Search AS | Professional & scientific | 2007 |
| Hartnet AS | Construction | 2018 |
| Harto AS | | 2024 |
| Hartree Partners (Norway) AS | Energy | 2023 |
| Hartung Music AS | Arts & recreation | 2025 |
| Hartvig Wennberg AS | Professional & scientific | 1996 |
| Hartz Moe Holding AS | | 2024 |
| Harvest AS | Education | 1990 |
| Harvest Holding AS | | 2012 |
| Harvest Publishing AS | Information & communication | 2013 |
| Harwest AS | Professional & scientific | 2019 |
| Harwik Holding AS | Real estate | 2005 |