| Forbundshuset AS | Real estate | 1991 |
| Forc AS | Information & communication | 2017 |
| Force Majeure Invest AS | | 2021 |
| Forces DC AS | Construction | 2019 |
| Fordelio AS | Information & communication | 2025 |
| Fordoppa AS | Real estate | 1990 |
| Fore Golf Club AS | Arts & recreation | 2025 |
| Forebyggende Investeringer AS | Wholesale & retail | 2022 |
| Forefence AS | Professional & scientific | 2012 |
| Forefoot AS | Information & communication | 2015 |
| Foregone Invest AS | Real estate | 2014 |
| Foreldrekanalen AS | Professional & scientific | 2020 |
| Forenede Industrier AS (Forina) | Real estate | 1874 |
| Forenede Industrier Eiendom AS | Real estate | 2012 |
| Forenede Industrier Finans AS | Real estate | 2016 |
| Forenede Industrier Holding AS | Real estate | 2012 |
| Forenede Industrier Shipping AS | Real estate | 2012 |
| Forenede Industrier Østfold AS | Real estate | 2018 |
| Forenede Service Partnere AS | Wholesale & retail | 1994 |
| Foreningen Tinghuskoret | Arts & recreation | 2013 |
| Foreningsdomstolen AS | Professional & scientific | 2023 |
| Foreningsdrift Da | Professional & scientific | 2000 |
| Forenom AS | Hospitality | 2014 |
| Forensic Audio Lab AS | Administrative & support | 2019 |
| Forensis Holding AS | Real estate | 2014 |
| Forente Forlag AS | Information & communication | 2022 |
| Foresight Consulting AS | Professional & scientific | 2023 |
| Forest & Brown AS | Hospitality | 2002 |
| Forest AS | Professional & scientific | 2012 |
| Forest Høyttalere Ans | Manufacturing | 1996 |
| Forest Landscapes AS | | 2013 |
| Forester AS | | 2016 |
| Forestsat AS | Information & communication | 2022 |
| Forestwatch AS | Information & communication | 2024 |
| Foretaksassistanse AS | Professional & scientific | 2011 |
| Foretakseiendom AS | Real estate | 1968 |
| Foretakskonsulenter AS | Real estate | 1994 |
| Forever Living Products Norway | Wholesale & retail | 1999 |
| Forex Norge AS | Financial services | 2023 |
| Forex Norge Nuf | | 2002 |
| Forfattermøter AS | Arts & recreation | 2025 |
| Forfatterne Bak AS | Arts & recreation | 2013 |
| Forflytningsteknikk AS | Education | 1998 |
| Forge Forward Capital AS | | 2020 |
| Forgetaboutit Da | Arts & recreation | 2018 |
| Forhandlingspartner AS | Administrative & support | 2011 |
| Foria Holding AS | | 2025 |
| Forinvest Co-Invest I AS | Real estate | 2026 |
| Forinvest Fund I AS | Financial services | 2026 |
| Fork Kantiner AS | Hospitality | 2024 |
| Forlaget 4.48 AS | Information & communication | 2025 |
| Forlaget Båtbørsen AS | Information & communication | 1993 |
| Forlaget Dykking AS | Information & communication | 1985 |
| Forlaget Happy Learning AS | Information & communication | 2002 |
| Forlaget Historie & Kultur AS | Information & communication | 2007 |
| Forlaget Lille Måne AS | Information & communication | 2005 |
| Forlaget Manifest AS | Information & communication | 2007 |
| Forlaget Oktober AS | Information & communication | 1970 |
| Forlaget Sund & Rask Aps | Information & communication | 2000 |
| Forlaget Tjuvtjern Nuf | Information & communication | 2024 |
| Forlagshuset Lunde AS | Information & communication | 1995 |
| Forlagstjenester AS | Information & communication | 2023 |
| Forland Consulting AS | Professional & scientific | 2013 |
| Forlike AS | Information & communication | 2025 |
| Forloren Skildpadde AS | Professional & scientific | 2026 |
| Form & Arkitektur AS | Real estate | 1973 |
| Form & Function AS | Wholesale & retail | 1999 |
| Form Eiendom AS | Real estate | 2016 |
| Form Med Aukland AS | Education | 2015 |
| Form STG13 AS | Real estate | 2022 |
| FORMA5 AS | Professional & scientific | 2022 |
| Formaa AS | Professional & scientific | 2026 |
| Formac Nuf | Wholesale & retail | 2008 |
| Format AS | Wholesale & retail | 1991 |
| Format B7 AS | Professional & scientific | 2014 |
| Formativity AS | | 2021 |
| Formatoriet AS | Professional & scientific | 2017 |
| Formax Inc | Wholesale & retail | 2006 |
| Formbase AS | Information & communication | 2026 |
| Formbygg Entreprenør AS | Construction | 2012 |
| Formel Industridesign AS | Financial services | 2005 |
| Formentera AS | Administrative & support | 1997 |
| Formfresing AS | Manufacturing | 2007 |
| Formica Norge AS | Wholesale & retail | 1999 |
| Formidlingspartner AS | Professional & scientific | 2026 |
| Formløs Architecture AS | Professional & scientific | 2013 |
| Formonde AS | Real estate | 2019 |
| Formotion Norway AS | Manufacturing | 1985 |
| Formstudio AS | Professional & scientific | 2023 |
| Formue Accounting AS | Professional & scientific | 2006 |
| Formue Advokater AS | Professional & scientific | 2016 |
| Formue AS | Financial services | 2000 |
| Formue Norge AS | Financial services | 1989 |
| Formue Pensjonsrådgivning AS | Professional & scientific | 2020 |
| Formue Private Equity AS | Financial services | 1998 |
| Formuen AS | Professional & scientific | 2012 |
| Formuesforvaltning AS | | 2022 |
| Formula Bilutleie AS | Administrative & support | 2023 |
| Formverk AS | Professional & scientific | 2022 |
| Fornebu Brygge AS | | 2019 |