| Fjellhagen AS | Real estate | 2021 |
| Flokken AS | Real estate | 2006 |
| Flower Outlet AS | Wholesale & retail | 2020 |
| Flus Invest AS | Real estate | 2021 |
| Foil Sport AS | Wholesale & retail | 2025 |
| Fokus Trykk AS | Manufacturing | 1974 |
| Foliefabrikken Holding AS | Real estate | 2012 |
| Follo Byggutvikling AS | Real estate | 1999 |
| Follo Entrepenørbygg AS | Real estate | 1993 |
| Follo Spaservice AS | Other services | 2025 |
| Foss & Co Eiendomsmegling AS | Real estate | 1985 |
| Foss & Co Holding AS | Real estate | 1999 |
| Foss & Co Næringsmegling AS | Real estate | 2015 |
| Foss Næringsmegling AS | Real estate | 1999 |
| Fram Kampsport Kolbotn AS | Education | 2023 |
| Fremtidsarv AS | Construction | 2025 |
| Freso Invest AS | Financial services | 2006 |
| Freyja Holding AS | | 2025 |
| Fried Rice AS | Hospitality | 2025 |
| Frigg.Eco AS | Professional & scientific | 2024 |
| Fritdjof Tonga Holding AS | Financial services | 2012 |
| Fugtor AS | Financial services | 2005 |
| Gaja AS | Professional & scientific | 1979 |
| Gardenstore AS | Wholesale & retail | 2018 |
| Gasolini Trafikkskole AS | Education | 2017 |
| Gastam AS | Information & communication | 2025 |
| Geirlab AS | Real estate | 2011 |
| Gh-Consulting AS | Wholesale & retail | 2019 |
| Ghaia AS | Wholesale & retail | 1997 |
| Gjøk Holding AS | Real estate | 2014 |
| Goalmaker Norge AS | Real estate | 1994 |
| Gogg AS | | 2020 |
| Good Foot Holding AS | Professional & scientific | 2023 |
| Grand Slam AS | | 2023 |
| Granerud AS | Real estate | 2012 |
| Granlund-Jones AS | Financial services | 2014 |
| Grapevine AS | Information & communication | 2019 |
| Grasmo Holding AS | Information & communication | 2020 |
| Gravermoen Holding AS | Construction | 2005 |
| Greenride AS | Administrative & support | 2026 |
| Greenrock AS | | 2022 |
| Grieg Eiendom AS | Real estate | 1996 |
| Grønnland Brygge AS | Wholesale & retail | 2007 |
| Gulbrandsen & Co AS | Wholesale & retail | 2015 |
| Gulla Holding AS | Professional & scientific | 2009 |
| Gynekologene På Kolbotn AS | Health & social care | 2016 |
| H.Malik Invest AS | | 2023 |
| Haastein Energi AS | Professional & scientific | 2005 |
| Hagbø AS | Real estate | 2021 |
| Hagen Capital Partners AS | Real estate | 2011 |
| Hairport Kolbotn AS | Other services | 2000 |
| Hamborg Butikkdrift AS | Wholesale & retail | 2008 |
| Hamper AS | Administrative & support | 1995 |
| Hanholm Invest AS | | 2019 |
| Hanne Vestøl AS | Financial services | 2011 |
| Hans Mordt Eiendomsselskap AS | Real estate | 1971 |
| Hans Nielsen Hauges Grunnskole Follo AS | Education | 2019 |
| Harald Vestøl AS | Professional & scientific | 2014 |
| Havklu AS | | 2021 |
| He Do Be Holding AS | | 2023 |
| Hegre AS | Real estate | 2017 |
| Hei Folk AS | Other services | 2026 |
| Heimlun AS | Real estate | 2025 |
| Hellinga 8 B Eiendom AS | Real estate | 2012 |
| Helos Invest AS | | 2023 |
| Henan AS | | 2022 |
| Hermosa Utvikling AS | Professional & scientific | 2008 |
| Hesland Invest AS | | 2019 |
| Hesland Takst AS | Professional & scientific | 2026 |
| Hest 21 AS | Education | 2021 |
| HFS Invests in IT AS | | 2022 |
| Himo Holding AS | Real estate | 2006 |
| Hjeravegen Eiendom AS | Real estate | 2017 |
| Hoida AS | | 2021 |
| Holmland Holding AS | | 2019 |
| Holterveien 24 AS | Real estate | 2019 |
| Househacker AS | Real estate | 2021 |
| Hov Investments AS | Professional & scientific | 2008 |
| HR Autolakk AS | Other services | 2007 |
| Huldra Invest AS | | 2012 |
| Husklar AS | Construction | 2026 |
| Hussain Transport AS | Transport & logistics | 2025 |
| Hvam Holding AS | Wholesale & retail | 2013 |
| Hvitebjørn AS | Construction | 2012 |
| Hvitebjørn Holding AS | Construction | 2012 |
| Hvitebjørn Skog Da | Agriculture & fishing | 1940 |
| Hvorfor Det? AS | Professional & scientific | 2015 |
| Hyldgaard Holding AS | Information & communication | 2021 |
| Håvard Tvinnereim Invest AS | | 2018 |
| Høibraaten Og Røste Autolakk Da | Other services | 2002 |
| Høy & Bruun AS | | 2026 |
| I Am Still Holding AS | Professional & scientific | 2022 |
| I B M Israel Ltd | Information & communication | 2009 |
| Ibk Holding AS | | 2024 |
| Ibr Innstallasjon Og Byggservice AS | Construction | 2000 |
| Ibr Nordic Invest AS | | 2022 |
| Iceinvest AS | Real estate | 2016 |
| Icemex AS | Wholesale & retail | 2020 |
| Idesign AS | Information & communication | 1998 |
| Iim AS | | 2022 |