| Hanna Melhus AS | | 2019 |
| Hannar Transport AS | Transport & logistics | 2021 |
| Hassan Holding AS | | 2024 |
| Hbcc Invest AS | Real estate | 2020 |
| HCM Holding AS | Professional & scientific | 2018 |
| Hegre Bygg AS | Construction | 2016 |
| Heidenreich AS | Wholesale & retail | 1988 |
| Heimen Næringsbygg AS | Real estate | 1976 |
| Helberg Bygg AS | Professional & scientific | 2012 |
| Hemaca Holding AS | | 2022 |
| Hemstad Holding AS | | 2024 |
| Hermon Forlag AS | Information & communication | 2005 |
| Hesselbergtak AS | Construction | 1968 |
| Hexeb AS | Financial services | 2015 |
| HG Montasje AS | Construction | 2023 |
| HHS Holding AS | Arts & recreation | 2023 |
| High & Low AS | Information & communication | 2019 |
| Hjerpseth AS | Information & communication | 2014 |
| Hoel Holding AS | | 2024 |
| Hoffer'N AS | Transport & logistics | 2015 |
| Holen Investering AS | | 2026 |
| HOLM1 AS | Information & communication | 2016 |
| Holmboe Invest AS | Other services | 2000 |
| Holt & Honningsvåg AS | Professional & scientific | 2025 |
| Holt Vestvollen Legekontor Da | Health & social care | 2015 |
| Holt Vestvollen Legesenter AS | Health & social care | 2014 |
| Holthagen Barnehage SA | Education | 1990 |
| Honning Film AS | Information & communication | 2021 |
| HR Executive AS | Professional & scientific | 2024 |
| Hundedaghjemmet AS | Agriculture & fishing | 2012 |
| Hunshammer AS | Professional & scientific | 2015 |
| Hurtigfrakt AS | Wholesale & retail | 2024 |
| Hus & Tilbygg AS | Construction | 2021 |
| Husebyjordet Andelslandbruk SA | Agriculture & fishing | 2015 |
| Huski Norge AS | Wholesale & retail | 2017 |
| Hussnain Transport AS | Transport & logistics | 2012 |
| HV Apotek AS | Wholesale & retail | 2017 |
| HVB Holding AS | | 2026 |
| Håkensen AS | | 2021 |
| Håkensen Eiendom AS | Real estate | 2019 |
| Håkensen Maskin AS | Wholesale & retail | 1968 |
| Håvard Hallås AS | | 2021 |
| Høibråten AS | Professional & scientific | 2013 |
| I14 Holding AS | Manufacturing | 2019 |
| Icecontrol AS | Professional & scientific | 2025 |
| Ideasy AS | Professional & scientific | 2009 |
| Ideler AS | Other services | 2015 |
| Ikigai-Invest AS | | 2024 |
| Imb Maskiner AS | Wholesale & retail | 1973 |
| Industriv 23 AS | Manufacturing | 1991 |
| Industriveien 6 a AS | Wholesale & retail | 2009 |
| Industriveien 9 B AS | Real estate | 2015 |
| Inselo AS | Information & communication | 2018 |
| Inselo Gruppen AS | Information & communication | 2015 |
| Inselo Logistikk AS | Information & communication | 2015 |
| Instant VVS AS | Construction | 2016 |
| Integral Business Development AS | Professional & scientific | 2008 |
| Intentional AS | Real estate | 2005 |
| Intercom Support AS | Wholesale & retail | 2000 |
| Internet Marketing Norge Nuf | Professional & scientific | 2010 |
| Investiamo AS | | 2021 |
| Investor Group AS | | 2021 |
| Ipsum Airport Technology AS | Professional & scientific | 2017 |
| Iq Investment AS | | 2026 |
| Iq-Drive AS | Education | 2026 |
| Iq-Driving AS | Education | 2026 |
| IV Produkt AS | Wholesale & retail | 2014 |
| Ivaana Services Nuf | Professional & scientific | 2022 |
| Ivar Holte AS | Wholesale & retail | 1965 |
| Ivar Holte Trading AS | Manufacturing | 2005 |
| Ivar Lyse Holding AS | Information & communication | 2017 |
| Iveien 3 AS | Real estate | 2013 |
| Iversen Data Holding AS | | 2018 |
| J E Ellefsrud Holding AS | | 2025 |
| J. Amundsen Holding AS | | 2019 |
| Jacs Eiendom AS | Real estate | 2022 |
| Jakub Kasperski AS | Transport & logistics | 2018 |
| JBG IT Consulting AS | Information & communication | 2015 |
| Jenco Invest AS | Financial services | 2015 |
| Jerv Holding AS | | 2025 |
| JK Montasje AS | Construction | 2019 |
| JLS Consulting AS | Manufacturing | 2002 |
| JM JM Holding AS | | 2024 |
| John-John Myhrvold Holding AS | Professional & scientific | 2024 |
| Jordsmonn AS | Wholesale & retail | 2026 |
| Jovo AS | Administrative & support | 2018 |
| Juto Bygg Og Renhold AS | Construction | 2019 |
| Juto Entreprenør AS | Construction | 2025 |
| Juviken AS | Financial services | 2005 |
| JWC AS | Professional & scientific | 2018 |
| Jøssangvegen 5 AS | Real estate | 2017 |
| K Eng & Co AS | Wholesale & retail | 1990 |
| K-Bilfrakt AS | Transport & logistics | 2026 |
| K2 Consulting AS | Professional & scientific | 2008 |
| Kaasene Group AS | Professional & scientific | 2013 |
| Kaia Melhus AS | | 2019 |
| Kamtek AS | Professional & scientific | 2016 |
| Karl-Erik Rønsen AS | Information & communication | 2022 |
| Karlsen & Co Kontorservice AS | Wholesale & retail | 1968 |
| Karlson Invest AS | Real estate | 2005 |