| Fjordbyen AS | Professional & scientific | 2022 |
| Fjordbyen Holding AS | Financial services | 2021 |
| Fjordbyen Medical AS | Health & social care | 2022 |
| Flexigulv Da | Manufacturing | 1999 |
| Focus Service AS | Manufacturing | 2020 |
| Foss Barnehage AS | Education | 2022 |
| Fossaas Holding AS | | 2026 |
| Fossveien 10 AS | Real estate | 2014 |
| Frantz Hegg Gartneri AS | Agriculture & fishing | 1991 |
| Freir Invest AS | | 2024 |
| Frigga Invest AS | | 2022 |
| Frika Invest AS | Professional & scientific | 2005 |
| Frisør Kjelleren Ans | Other services | 2003 |
| FRM Eiendom AS | Financial services | 2005 |
| Frode Hagen AS | Health & social care | 2012 |
| Frost Design AS | Manufacturing | 2000 |
| Fruene Haugestad AS | Hospitality | 2002 |
| Fruktveien Eiendom AS | Real estate | 2010 |
| Fruktveien Landbrukspark AS | Real estate | 2011 |
| Fuelquant AS | Professional & scientific | 2026 |
| Fungames AS | Arts & recreation | 2003 |
| Futura Gruppen AS | | 2022 |
| Gacalu Invest AS | Real estate | 2021 |
| Garnbutikken AS | Wholesale & retail | 2013 |
| Gea Bygg AS | Construction | 2019 |
| GFN Invest AS | Financial services | 2009 |
| Gi Solutions AS | Construction | 2020 |
| Glitre VVS AS | Construction | 2026 |
| Global Trucks Utleie AS | Administrative & support | 2006 |
| Gluggen Invest AS | | 2022 |
| Gnesgreb Holding AS | | 2020 |
| God Jul, Lille Venn AS | Health & social care | 2025 |
| Grafia Creative AS | Wholesale & retail | 2011 |
| Green Trading AS | Professional & scientific | 2014 |
| Grewa Holding AS | Real estate | 2005 |
| Grewa Liertoppen AS | Wholesale & retail | 2008 |
| Grine Invest AS | | 2020 |
| Grini Consult AS | Professional & scientific | 1989 |
| Groats Holding AS | | 2014 |
| Gry Karina AS | Other services | 2023 |
| Grønt Veksthus AS | Agriculture & fishing | 2022 |
| GTF Holding AS | Health & social care | 2020 |
| GTF Investment AS | | 2025 |
| Gustavsen Maskinering AS | Manufacturing | 2012 |
| Gutfinszky AS | Professional & scientific | 2007 |
| Gutfinszky Capital Ltd Nuf | Professional & scientific | 2025 |
| H Entreprenør AS | Construction | 2024 |
| H&H Scouting AS | Professional & scientific | 2024 |
| Haarberg Betongsaging AS | Construction | 2009 |
| Haarberg Maskin AS | Construction | 1998 |
| Hafskjold Holding AS | Financial services | 2005 |
| Hagan Utvikling AS | Real estate | 1994 |
| Hakka Cafe Og Restaurant AS | Hospitality | 2018 |
| Hakon Lærum Consulting AS | Professional & scientific | 2014 |
| Hamborg Invest AS | Administrative & support | 1969 |
| Hamito AS | Real estate | 2005 |
| Haml Holding AS | Real estate | 2024 |
| Handelshuset Petterød AS | Wholesale & retail | 2023 |
| Harald Kortnes AS | Real estate | 1967 |
| Harald Sæther AS | Administrative & support | 2025 |
| Harald Sæther Holding AS | Administrative & support | 2024 |
| Harengus AS | | 2022 |
| Hasselbakken Fus Barnehage AS | Education | 2018 |
| Haugesgt 86 AS | Real estate | 1947 |
| Hber AS | | 2019 |
| HDN Holding AS | | 2025 |
| Healy Builds AS | Construction | 2021 |
| Heda Invest AS | Health & social care | 2005 |
| Hegg Nordic Ans | Wholesale & retail | 2017 |
| Heggtoppen Blomster AS | Wholesale & retail | 2015 |
| Hegsbroveien 46 AS | Real estate | 2005 |
| Heimdal Multiservice AS | Wholesale & retail | 2025 |
| Helgerud Barnegård AS | Education | 2005 |
| Helgerud Byggtegning AS | Professional & scientific | 2016 |
| Helgerud Gård Da | Agriculture & fishing | 2004 |
| Helgerud-Åmotsbråten Vannselskap SA | Water & waste | 2017 |
| Helle's Hårsalong AS | Other services | 2007 |
| Hellum Invest AS | Real estate | 2022 |
| Helt Rått Frisør AS | Other services | 2020 |
| Her Holding AS | | 2005 |
| HFP Holding AS | | 2019 |
| HFS Rør AS | Construction | 2023 |
| Hjelpemiddelservice AS | Manufacturing | 2022 |
| Hjemmetjenesten AS | Health & social care | 2020 |
| Hklc Invest AS | | 2022 |
| Hny 034 Holding AS | | 2023 |
| Hokksund Hestesport AS | Wholesale & retail | 2012 |
| Holding Tomorrow AS | Professional & scientific | 2023 |
| Holmaveien 45 AS | Wholesale & retail | 2013 |
| Holmen & Green Da | Agriculture & fishing | 2023 |
| Holmen Drift AS | Administrative & support | 2024 |
| Holmendammen AS | Real estate | 2006 |
| Home Security AS | Wholesale & retail | 2013 |
| Hovslager Hembre AS | Agriculture & fishing | 2017 |
| HP Engebråten Totalt AS | Hospitality | 2005 |
| HR Holding Invest AS | Real estate | 2012 |
| Hulix AS | Information & communication | 2023 |
| Hus Norge AS | Real estate | 2024 |
| Hveding Johnson Kiropraktikk AS | Health & social care | 2021 |
| Hydraulikk & Sveiseteknikk AS | Other services | 2004 |