| Hornstuen Holding AS | | 2026 |
| Hornsund Invest AS | Financial services | 2013 |
| Horntvedt Consulting AS | | 2024 |
| Horntvedt Invest AS | Financial services | 2013 |
| Horsberg Holding AS | Education | 2019 |
| Horsdal Holding AS | Financial services | 2018 |
| Horse Show AS | Arts & recreation | 1992 |
| Horseby AS | Professional & scientific | 2017 |
| Horsens Logistics Denmark II AS | | 2017 |
| Horstad Invest AS | | 2025 |
| Horsø Invest AS | Real estate | 2022 |
| Hortemo Ventures AS | Financial services | 2018 |
| Horten Handelspark AS | Real estate | 2021 |
| Horten Holding AS | Financial services | 2025 |
| Horten Stasjon Eiendomsutvikling AS | Real estate | 2022 |
| Horten Utvikling AS | Real estate | 2012 |
| Hortifiber AS | Professional & scientific | 2026 |
| Horton International Management AS | Professional & scientific | 2016 |
| Hortulan AS | Financial services | 2020 |
| Hortulan Assets AS | | 2021 |
| Hortulan Eiendom AS | Real estate | 2020 |
| Hortulan Holding AS | | 2020 |
| Hortulan JV AS | | 2020 |
| Hortum AS | | 2023 |
| Hortum Invest AS | | 2023 |
| Horus AS | Information & communication | 2009 |
| Horvest AS | Construction | 2023 |
| Hos Mashu & Nora Da | Wholesale & retail | 2009 |
| Hos Skøyen AS | Wholesale & retail | 2011 |
| Hoseinian Yousef Holding AS | Professional & scientific | 2022 |
| Hosfarma AS | Hospitality | 2022 |
| Hosh AS | | 2021 |
| Hoslemo Kraft AS | Energy | 2025 |
| Hosletoppen Holding AS | Financial services | 2005 |
| Hosmand Abdulkadir, Ahmad Ans | Hospitality | 2006 |
| Hospitalet AS | Real estate | 2009 |
| Hospitality Concept Development AS | Real estate | 2013 |
| Hospitality Invest AS | Education | 2002 |
| Hospitech AS | Information & communication | 2018 |
| Hospitsveien 10B AS | Real estate | 2021 |
| Hospitsveien 15B AS | Real estate | 2020 |
| Hospo Vision AS | | 2025 |
| Hoss AS | | 2020 |
| Hoss Consulting AS | Professional & scientific | 2025 |
| Host Breiseth Lillehammer AS | Real estate | 1917 |
| Host Hoteleiendom AS | Real estate | 1986 |
| Host Hotelleiendom Norge AS | Real estate | 1997 |
| Host Jessheim AS | Real estate | 2005 |
| HOST1 AS | Information & communication | 2012 |
| Hot Club De Fossefall AS | | 2026 |
| Hot Grill AS | Hospitality | 2025 |
| Hot Mix Norge AS | Construction | 2025 |
| Hot Mix OY Finland Nuf | Construction | 2025 |
| Hot Plate Holding AS | Hospitality | 2013 |
| Hot Temper AS | Hospitality | 2023 |
| Hotdeals Da | Information & communication | 2011 |
| Hotdog AS | Wholesale & retail | 2024 |
| Hote Capital AS | Professional & scientific | 2020 |
| Hotel Amerikalinjen AS | Hospitality | 2016 |
| Hotel Concept AS | Professional & scientific | 2011 |
| Hotel Continental AS | Hospitality | 2005 |
| Hotel Filip AS | Real estate | 2016 |
| Hotel Folketeateret AS | Hospitality | 2009 |
| Hotel Gabelshus AS | Hospitality | 2003 |
| Hotel Norge AS | Hospitality | 1987 |
| Hotel Operation K7 AS | Hospitality | 2022 |
| Hotel Oslo AS | Hospitality | 2000 |
| Hotel Park Inn AS | Real estate | 2006 |
| Hotel Tempus AS | Hospitality | 1998 |
| Hotel Verdandi Oslo AS | Hospitality | 2018 |
| Hotel Østbanehallen AS | Hospitality | 2000 |
| Hotel+ AS | Professional & scientific | 2018 |
| Hotel@Home AS | Health & social care | 2020 |
| Hotelintel Consulting AS | Professional & scientific | 2022 |
| Hotell 33 AS | Real estate | 2006 |
| Hotell Bondeheimen AS | Hospitality | 1982 |
| Hotell Utviklings Selskap AS | Hospitality | 2010 |
| Hotell Østre AS | Real estate | 2014 |
| Hotell- Og Restauranthuset Continental AS | Hospitality | 1965 |
| Hotelldrift Bodø AS | Hospitality | 2026 |
| Hotelldrift CL Bjørvika AS | Hospitality | 2016 |
| Hotelldrift CL the Hub AS | Hospitality | 1982 |
| Hotelldrift Karl Johan AS | Hospitality | 2000 |
| Hotelldrift Oslo Sentrum AS | Hospitality | 2010 |
| Hotelldrift Q Haslelinje AS | Hospitality | 1995 |
| Hotelldrift Quadrum AS | Hospitality | 2010 |
| Hotelldrift Stortingsgata AS | Hospitality | 2013 |
| Hotellgården AS | Real estate | 1977 |
| Hotellveien 44 AS | Real estate | 2020 |
| Hotelonline AS | | 2006 |
| Hotels for Two AS | Information & communication | 2017 |
| Hotelthon AS | Hospitality | 1994 |
| Hotplot AS | Professional & scientific | 2025 |
| Hotpot International AS | Wholesale & retail | 2017 |
| Hotpot Oslo AS | Hospitality | 2014 |
| Hotra AS | Wholesale & retail | 1991 |
| Hotspur Holding AS | Real estate | 2013 |
| Hotvedtveien 6 AS | Real estate | 2016 |
| Hotvet Næringspark AS | Real estate | 2017 |
| Hotvetalleen 1 Bolig AS | Real estate | 2025 |