| GG Bygg Og Rehabilitering AS | Construction | 2019 |
| Gimse AS | Real estate | 2017 |
| Gislerud Carpets AS | Wholesale & retail | 2012 |
| Gjellebekkstubben 19 AS | Real estate | 2022 |
| Gjengstø Carrera AS | Professional & scientific | 2026 |
| Gjeving Eiendom AS | Real estate | 1993 |
| GMP AS | Health & social care | 2016 |
| Go Calypso AS | Information & communication | 2022 |
| Godfot Scandinavia AS | Wholesale & retail | 2014 |
| Gohagen Holding AS | Financial services | 2005 |
| GR Consulting AS | | 2013 |
| Gral Utvikling AS | Real estate | 2024 |
| Gratech AS | Professional & scientific | 2016 |
| Grefsen Invest AS | Wholesale & retail | 2016 |
| Grenseveien 2 AS | Wholesale & retail | 2006 |
| Grunnsteinen AS | Real estate | 2017 |
| Grunnsteinen Boligutleie AS | Real estate | 2020 |
| Grunnsteinen Forvaltning AS | Real estate | 2023 |
| Grønn Rehab Og Miljøsanering AS | Construction | 2023 |
| Gubseis Consult AS | Professional & scientific | 2005 |
| Gupe AS | Financial services | 2017 |
| Guriåsen 6 AS | Real estate | 2019 |
| H & W Invest AS | Financial services | 2008 |
| H.Storm Invest AS | Real estate | 2005 |
| Haarseth Invest AS | Financial services | 2018 |
| Hadeland Lys Og Tinnstøperi AS | Wholesale & retail | 1991 |
| Hagelandgruppen AS | Administrative & support | 2014 |
| Hagen Kapital AS | | 2026 |
| Halvhel Holding AS | Financial services | 2005 |
| Halvorsen Seilen Holding AS | | 2023 |
| Hamlex AS | Professional & scientific | 2023 |
| Hammerseth Holding AS | Financial services | 2016 |
| Hanseatic AS | Professional & scientific | 2014 |
| Hanske-Hallén AS | Wholesale & retail | 2019 |
| Hatta Consulting AS | Information & communication | 2023 |
| Hauge Omtveit AS | Information & communication | 2024 |
| Havnes Invest AS | Professional & scientific | 2010 |
| HD Medical AS | Health & social care | 2013 |
| Heda Holding AS | Real estate | 2014 |
| Heggo Holding AS | | 2024 |
| Heilmann Invest AS | | 2020 |
| Hekama Invest AS | | 1997 |
| Hekla Eiendom AS | Real estate | 2000 |
| Helt Unik AS | Wholesale & retail | 2013 |
| Hendrix Hair Slependen AS | Other services | 2019 |
| Henvar Invest AS | Real estate | 2015 |
| Hermanns Invest AS | | 2020 |
| Herop AS | | 2018 |
| Hexa Invest AS | | 2023 |
| Hfsb Invest AS | | 2024 |
| Hjemom Bergerløkka AS | Real estate | 2021 |
| Hjemom Langenga AS | Real estate | 2021 |
| HMF Invest AS | | 2025 |
| HMJ AS | | 2021 |
| Hold Ut AS | | 2022 |
| Holmen Bolig AS | Real estate | 2021 |
| Holmquist AS | Wholesale & retail | 1995 |
| Holten Revisjon AS | Professional & scientific | 1997 |
| Holth & Winge AS | Education | 2021 |
| Honest Growth AS | Information & communication | 2025 |
| Hormony AS | Education | 2023 |
| Hotel Link AS | Administrative & support | 1997 |
| Hotspring Import AS | Wholesale & retail | 2007 |
| House of Sandhu AS | | 2025 |
| Hubro Invest AS | Professional & scientific | 2005 |
| Hurtigrenovering AS | Real estate | 2006 |
| Hyfer AS | | 2019 |
| Høst Search & Selection AS | Administrative & support | 2020 |
| Høvik Industrier AS | Real estate | 1996 |
| Høyer Outlet Slependen AS | Wholesale & retail | 2022 |
| I-K Invest AS | Professional & scientific | 1999 |
| I4 Technology AS | Information & communication | 2018 |
| Idrettsbarna Svøm Og Foto AS | Education | 2018 |
| Igk Konsult AS | Professional & scientific | 1999 |
| II Ventyr Holdco AS | | 2023 |
| Ikea AG | | 2003 |
| Ikea AS | Wholesale & retail | 1976 |
| Ikea B.V. | Administrative & support | 2009 |
| Ikea Belgium | Administrative & support | 2015 |
| Ikea Deutschland GmbH & Co KG | Wholesale & retail | 2004 |
| Ikea Eiendom Holding AS | Real estate | 2006 |
| Ikea Handel Og Eiendom AS | Wholesale & retail | 1962 |
| Ikea Leberendezesi KFT | Professional & scientific | 2006 |
| Ikea Retail SP Zoo | Professional & scientific | 2006 |
| Ikea Supply AG | Wholesale & retail | 2006 |
| Ikea Svenska Førsæljnings AB Avd Kungens Kurva | Wholesale & retail | 2004 |
| Ikea Trading Sevices SRL | Other services | 2014 |
| Ikea U.S. West Inc. | Administrative & support | 2013 |
| Ikonic Apparel AS | Wholesale & retail | 2011 |
| Imologi AS | Information & communication | 2012 |
| Impendo AS | Real estate | 2005 |
| Impregneringsteknikk AS | Construction | 2014 |
| Inaventa Solar AS | Manufacturing | 2019 |
| Indal Bygg & Montasje AS | Construction | 2022 |
| Indal Invest AS | Construction | 2012 |
| Indre Havneby Bolig AS | Real estate | 2016 |
| Infra Group AS | Construction | 2021 |
| Ingeniørfirmaet Braathen AS | Professional & scientific | 1989 |
| Inglov Invest AS | | 2023 |
| Initico AS | Financial services | 2000 |