| Green Seed Holding AS | | 2024 |
| Gressvik Utemiljø AS | Wholesale & retail | 2016 |
| Gridsome AS | Professional & scientific | 2016 |
| Grön-Hansen Logistik AB | Administrative & support | 2004 |
| Grønnet AS | Wholesale & retail | 1999 |
| Grøntkompaniet AS | Administrative & support | 2025 |
| Grønvold & Co AS | Professional & scientific | 2007 |
| Grøtseter Stedje Sameige Ans | Real estate | 2002 |
| Gulbjørnrud Holding AS | Professional & scientific | 2020 |
| Gullgården AS | Real estate | 2007 |
| Gultvedt Maskin AS | Administrative & support | 2014 |
| H2OPS AS | Professional & scientific | 2019 |
| Hammer-Snekkerservice AS | Construction | 2023 |
| Hannes Fotterapi AS | Health & social care | 2015 |
| Haug Miljøpark AS | Construction | 2024 |
| Haugerudveien AS | Real estate | 2017 |
| Haugerudveien Veilag SA | Real estate | 2023 |
| Haugsten AS | Administrative & support | 2013 |
| Haven Pizza AS | Hospitality | 2026 |
| Havgap AS | | 2021 |
| Heia Eiendom AS | Real estate | 1993 |
| Heij Invest AS | | 2023 |
| Heir Consulting AS | Professional & scientific | 2025 |
| Heka Invest AS | | 2020 |
| Hellekroken 21-31 Samvirkeforetak SA | Real estate | 2024 |
| Helt I Det Blå AS | Arts & recreation | 2013 |
| Hestehagen 34 AS | | 2025 |
| Higdem Invest AS | Real estate | 2006 |
| Histo Company AS | Professional & scientific | 2026 |
| HLL AS | | 2026 |
| Hmad Holding AS | | 2025 |
| Hmka Holding AS | | 2025 |
| Hoelmyr Invest AS | Real estate | 2012 |
| Holteløkka AS | Real estate | 2020 |
| Honningpiken AS | Agriculture & fishing | 2018 |
| HRG Holding AS | | 2020 |
| HRG Maritime AS | Financial services | 2017 |
| HS Mc-Senter AS | Wholesale & retail | 2015 |
| Humle Holding AS | Professional & scientific | 2023 |
| Hundeskolen Veiviseren AS | Agriculture & fishing | 1990 |
| Husfliden Sigrun AS | Manufacturing | 2018 |
| Husrom AS | Real estate | 2003 |
| Hvamstad Holding AS | | 2025 |
| Hvile AS | Arts & recreation | 2024 |
| HVK Holding AS | | 2026 |
| Hyzer AS | Wholesale & retail | 2024 |
| Håp Holding AS | Financial services | 2005 |
| Hårstudio 1095 AS | Other services | 2018 |
| Idefisk Ans | Wholesale & retail | 1995 |
| Iha Capital AS | | 2023 |
| Ikke Bare Blåbær AS | Agriculture & fishing | 2025 |
| Imas Analytics AS | | 2026 |
| Indcon AS | Information & communication | 2009 |
| Infinity Consulting AS | Professional & scientific | 2024 |
| Infinity Investment AS | Professional & scientific | 2024 |
| Ingeniørfirmaet Truls Wetterhus AS | Wholesale & retail | 2005 |
| Inkognita Interiør & Produksjon AS | Professional & scientific | 2019 |
| Inma Invest AS | Professional & scientific | 2005 |
| Inovex AS | Information & communication | 2025 |
| Inspire to Action AS | Information & communication | 2020 |
| Intellia AS | Professional & scientific | 2024 |
| International Community of Anthrozoology AS | Other services | 2022 |
| Io Sorgenfri AS | | 2001 |
| Isdahl Holding AS | | 2022 |
| J&B Eiendom AS | Real estate | 2019 |
| J-Thoresen AS | | 2021 |
| J.Magnus Holding AS | | 2026 |
| Jaco Trading AS | | 2023 |
| Jan Wold AS | Health & social care | 2002 |
| Jan Wold Eiendom AS | Real estate | 2022 |
| Jan Wold Holding AS | Real estate | 2022 |
| Jan-Erik Teigen AS | Real estate | 2019 |
| Jawa Bygg AS | Construction | 2022 |
| Jedski AS | | 2020 |
| Jee Teigen AS | Construction | 2020 |
| Jero Invest AS | | 2020 |
| JHP Tech Holding AS | | 2022 |
| Jina Invest AS | | 2025 |
| JJC Consult AS | Professional & scientific | 2024 |
| Jnholding AS | | 2025 |
| Joakims Eiendom AS | Real estate | 2024 |
| Jordet Butikkdrift AS | Wholesale & retail | 2019 |
| Jothas Betong AS | Construction | 2003 |
| Jovial Invest AS | Real estate | 2019 |
| Joyless Music Da | Arts & recreation | 2021 |
| Jump! AS | Professional & scientific | 2025 |
| Just Quality AS | Construction | 2020 |
| Jømat Holding AS | Financial services | 2021 |
| K-S Holding AS | Construction | 2023 |
| K81 Elektroservice AS | Construction | 2022 |
| Kaja Garasjer SA | Real estate | 2010 |
| Kallasten Invest AS | Real estate | 2016 |
| Kaxrud Holding AS | | 2022 |
| Kaxrud Takst & Bygg AS | Real estate | 2026 |
| Kaya Capital AS | | 2025 |
| Kenneth Andersen Holding AS | | 2021 |
| Keystroke AS | Professional & scientific | 2020 |
| KHB Holding AS | Financial services | 2005 |
| Kivora AS | Professional & scientific | 2026 |
| Kjell a. Sørlie Holding AS | Real estate | 2019 |