| Ha Long Ans | Hospitality | 2001 |
| Ha Mini Kiosk AS | Transport & logistics | 2021 |
| Ha Solsenter AS | Other services | 2020 |
| Ha-Ho AS | | 2021 |
| Ha-Invest AS | Financial services | 2016 |
| HA10E MFL AS | Real estate | 2020 |
| HA12A AS | Real estate | 2015 |
| HA2B AS | Real estate | 2025 |
| HA8A AS | Real estate | 2026 |
| Haab AS | Real estate | 2007 |
| Haaco Bygg AS | Construction | 2019 |
| Haadem Capital AS | | 2024 |
| Haadem Invest AS | Financial services | 1989 |
| Haageberg AS | Professional & scientific | 2006 |
| Haagens AS | | 2026 |
| Haagensen Kiropraktikk AS | Health & social care | 2022 |
| Haagrin AS | Professional & scientific | 2026 |
| Haagrin Holding AS | | 2026 |
| Haak Holding AS | Arts & recreation | 2024 |
| Haakenstad Holding AS | | 2021 |
| Haakhen AS | | 2020 |
| Haakmar AS | Arts & recreation | 2012 |
| Haako AS | Construction | 2019 |
| Haakon Aa Holding AS | | 2023 |
| Haakon Blystad Im AS | Financial services | 2014 |
| Haakon Den Gode AS | Real estate | 2013 |
| Haakon Den Godes Vei 23 AS | Real estate | 2009 |
| Haakon K Invest AS | | 2019 |
| Haakon Tveters Vei 8 Da | Real estate | 1992 |
| Haakon Tærud AS | Hospitality | 1968 |
| Haakon Vii's Gate 1 Ans | Real estate | 2001 |
| Haakon Vii's Gate 15 / 17 AS | Real estate | 1994 |
| Haakon Vii's Gate 4 Holding AS | Real estate | 2015 |
| Haakon Vii's Gate 4 Utvikling AS | Real estate | 2019 |
| Haakon Vii's GT 4 AS | Real estate | 2001 |
| Haakon Viis Gate 5 Holding AS | Real estate | 2006 |
| Haakon Viis Gate 98 AS | Professional & scientific | 2005 |
| Haakon Viis GT. 6 AS | Real estate | 2006 |
| Haakon Ølmheim Holding AS | | 2024 |
| Haakonas Transport AS | Transport & logistics | 2023 |
| Haakonsk AS | Financial services | 2016 |
| Haakonsult AS | Health & social care | 2018 |
| Haakonsvern Energi AS | Energy | 2020 |
| Haakonto AS | Professional & scientific | 2019 |
| Haaland Arkitektur AS | Professional & scientific | 2024 |
| Haaland Bygg AS | Real estate | 2004 |
| Haaland Eiendom Holding AS | Real estate | 2020 |
| Haaland Familieholding AS | Real estate | 2020 |
| Haaland Klima AS | Construction | 2004 |
| Haaland Klima Holding AS | Real estate | 2020 |
| Haaland Shop AS | Wholesale & retail | 2023 |
| Haalis AS | | 2022 |
| Haam AS | | 2021 |
| Haamar AS | | 2023 |
| Haamund Holding AS | | 2025 |
| Haanshuus Kontor AS | Wholesale & retail | 2013 |
| Haanæs Holding AS | | 2019 |
| Haar Oslo Frisør AS | Other services | 2019 |
| Haara Holding AS | | 2026 |
| Haarberg Consulting AS | Professional & scientific | 2018 |
| Haare Holding AS | Real estate | 2021 |
| Haaris Holding AS | Real estate | 2013 |
| Haarr Invest AS | | 2024 |
| Haarsaker Holding AS | | 2023 |
| Haas Group International SCM Ltd | Wholesale & retail | 2009 |
| Haas Holding AS | | 2020 |
| Haas Invest AS | | 2026 |
| Haathor Holding AS | | 2026 |
| Haav Invest AS | | 2020 |
| Haavard Ellingsen Holding AS | Construction | 2016 |
| Haavard Martinsens Vei 26 AS | Real estate | 2012 |
| Haavard Martinsens Vei 30 AS | Real estate | 2010 |
| Haavard Martinsens Vei 5 AS | Real estate | 2005 |
| Haave Invest AS | | 2024 |
| Haavet Holding AS | | 2020 |
| Haavik & Co AS | Professional & scientific | 2000 |
| Haawal Engineering AS | Professional & scientific | 2016 |
| Haawil AS | Financial services | 2017 |
| Haba Invest AS | Real estate | 2016 |
| Habanero AS | Professional & scientific | 2011 |
| Habbele Holding AS | Real estate | 2021 |
| Habben Holding AS | | 2015 |
| Habberstad AS | Professional & scientific | 2023 |
| Habberstad Rekruttering Og Utvikling AS | Professional & scientific | 2003 |
| HABE2 AS | Professional & scientific | 2026 |
| Habel GmbH Tyskland | Construction | 2012 |
| Habena AS | Professional & scientific | 2009 |
| Habeo Eiendom AS | Real estate | 2007 |
| Habil Kaloshi AS | Wholesale & retail | 2005 |
| Habitare AS | Real estate | 1991 |
| Habitatge Norway Limited | Real estate | 2025 |
| Habitationi AS | Real estate | 2020 |
| Habitus AS | Information & communication | 2003 |
| Hablani AS | Education | 2024 |
| Habo Rostfria AB | Administrative & support | 2015 |
| Habornveien 48B AS | Real estate | 2012 |
| Habra Invest AS | Real estate | 2004 |
| Habtech AS | Information & communication | 2021 |
| Habu AS | Financial services | 1992 |
| Hac Solutions AS | Administrative & support | 2018 |