| Hallby AS | | 2024 |
| Halle & Halle AS | Professional & scientific | 2005 |
| Halleluja AS | | 2010 |
| Hallen AS | Real estate | 1997 |
| Hallen Invest AS | Real estate | 2018 |
| Hallerud Consulting AS | Professional & scientific | 2024 |
| Hallerud Investment AS | Professional & scientific | 2024 |
| Hallestrand AS | Real estate | 2005 |
| Hallgeir Tangen Anlegg AS | Construction | 2022 |
| Hallgren & Hallgren AS | Professional & scientific | 1992 |
| Hallgren Finansforvaltning Haff AS | Professional & scientific | 1961 |
| Hallgutu Holding AS | | 2024 |
| Hallheimslien 12 AS | Real estate | 2018 |
| Hallingdal Hotelldrift AS | Hospitality | 2009 |
| Hallinggruppen AS | Construction | 2020 |
| Hallingnatten AS | Real estate | 2006 |
| Hallings Gate 3A AS | Real estate | 2017 |
| Hallingsgate 1 AS | Real estate | 2019 |
| Hallingskarvet 2025 AS | Real estate | 2014 |
| Hallingskarvet Fjellgrend AS | Real estate | 2007 |
| Hallingskarvet Skitun AS | Hospitality | 2009 |
| Hallingstad Eiendom AS | Real estate | 2025 |
| Hallingvask AS | Administrative & support | 2024 |
| Halliot AS | Information & communication | 2015 |
| Hallis Invest AS | Real estate | 2020 |
| Hallo Forlag AS | Information & communication | 2026 |
| Hallo Verden AS | Information & communication | 2015 |
| Halloi Holding AS | Financial services | 2017 |
| Halloween Invest AS | Real estate | 2020 |
| Hallstein AS | Professional & scientific | 2016 |
| Hallsystemer AS | Wholesale & retail | 1998 |
| Hallum Og Jensen AS | Information & communication | 2009 |
| Hallvard AS | Financial services | 2017 |
| Hallvard Bragge AS | | 2018 |
| Hallvard Hotvedt Holding AS | | 2025 |
| Hallvard Høiberg AS | | 2026 |
| Hallvard Høiberg Ønh AS | Health & social care | 2026 |
| Hallén Eiendom AS | Administrative & support | 2017 |
| Hallén Holding AS | Professional & scientific | 2012 |
| Halm Invest AS | | 2025 |
| Halmrast Capital AS | | 2026 |
| Halmø Holding AS | | 2022 |
| Halne Eiendom AS | Real estate | 2006 |
| Halo Invest AS | Professional & scientific | 2005 |
| Halo Solar Holding AS | Professional & scientific | 2016 |
| Halodyne AS | Professional & scientific | 2025 |
| Halogen AS | Information & communication | 2002 |
| Haloludvigsen AS | Professional & scientific | 2015 |
| Halos Eiendom AS | Construction | 2013 |
| Halpol Invest AS | | 2021 |
| Hals Invest AS | Real estate | 2022 |
| Halsen & Nystøyl AS | Real estate | 1997 |
| Halsen AS | Professional & scientific | 2023 |
| Halsetsvea Eiendom 2 AS | Real estate | 2012 |
| Halsetsvea Eiendom 3 AS | Real estate | 2017 |
| Halsetsvea Eiendom AS | Real estate | 2011 |
| Halsetsvea Holding AS | Real estate | 2017 |
| Halsteinli Invest AS | | 2024 |
| Halstensen AS | Real estate | 2007 |
| Halton Foodservice GmbH | Construction | 2011 |
| Halton Marine OY | Manufacturing | 2018 |
| Haltuff Elektro AS | Construction | 2013 |
| Halva Priset AS | Arts & recreation | 2022 |
| Halva Priset Merch AS | Wholesale & retail | 2024 |
| Halval Holding AS | | 2017 |
| Halvdan Svartes Gate 11B AS | Real estate | 2021 |
| Halvdan Svartes Gate 46 AS | Real estate | 2021 |
| Halvmåne Styling AS | Other services | 2022 |
| Halvo Holding AS | | 2022 |
| Halvor Bjerke AS | Wholesale & retail | 2001 |
| Halvor Boe AS | Financial services | 2005 |
| Halvor Johansson AS | Arts & recreation | 2023 |
| Halvor Linder Holdingsen AS | | 2026 |
| Halvor Rasmussen AS | Wholesale & retail | 2001 |
| Halvorsbøle AS | Administrative & support | 2003 |
| Halvorsen & Møinichen AS | | 1989 |
| Halvorsen Forvaltning AS | | 2024 |
| Halvorsen Investor AS | | 2005 |
| Halvorsen Tekst AS | Arts & recreation | 2026 |
| Halvorsens AS | | 2021 |
| Halvorsens Conditori AS | Manufacturing | 2008 |
| Halvorsens Eftf. Holding AS | | 2023 |
| Halvra AS | Information & communication | 2026 |
| Ham Invest AS | Real estate | 2005 |
| Hama Invest AS | Real estate | 2010 |
| Hamaba Holding AS | | 2020 |
| Hamachi AS | | 2012 |
| Hamajaca AS | Financial services | 2005 |
| Haman Group AS | Administrative & support | 2005 |
| Haman Terra Nova AS | Administrative & support | 1990 |
| Haman Travel AS | Administrative & support | 1995 |
| Hamang Terrasse 55 AS | Real estate | 1997 |
| Hamang Utvikling AS | Real estate | 2022 |
| Hamangskogen 10 AS | Real estate | 2020 |
| Hamap AS | Financial services | 2005 |
| Hamar Kontoreiendom AS | Financial services | 2021 |
| Hamar Logistikkinvest AS | Real estate | 2018 |
| Hamar Science Park AS | Real estate | 2024 |
| Hamar Storhandel AS | Real estate | 2021 |
| Hamar Vest Invest AS | Real estate | 2007 |