| Fasan AS | | 2019 |
| Fase Ventures AS | | 2022 |
| Fasett Oslo AS | Professional & scientific | 2021 |
| Fashe AS | Professional & scientific | 2015 |
| Fashion and New Limited Nuf | Wholesale & retail | 2012 |
| Fashion Mix AS | Wholesale & retail | 2014 |
| Fashion Partners AS | Wholesale & retail | 1994 |
| Fashionistaslemdal AS | Wholesale & retail | 2016 |
| Fasilitetsmegleren AS | Wholesale & retail | 2012 |
| Fasilitetstjenesten AS | Administrative & support | 2016 |
| Fasola AS | | 2020 |
| Fast Byggtjenester AS | Construction | 2020 |
| Fast Candy AS | Wholesale & retail | 2021 |
| Fast Candy Oslo City AS | Wholesale & retail | 2024 |
| Fast Candy Via Vika AS | Wholesale & retail | 2023 |
| Fast Eiendomspartner AS | Real estate | 2010 |
| Fast Roof Isolation AS | Professional & scientific | 2024 |
| Fastcharge 24 AS | Energy | 2022 |
| Fastcharge AS | Energy | 2022 |
| Fastcharge Founderco AS | Construction | 2022 |
| Fastdesk AS | Information & communication | 2021 |
| Fasteie AS | Real estate | 2007 |
| Fastener AS | Real estate | 1964 |
| Fasteverger.No AS | Information & communication | 2017 |
| Fastfin AS | Professional & scientific | 2023 |
| Fastflow Solutions AS | Information & communication | 2010 |
| Fastfood Shopping AS | Wholesale & retail | 2004 |
| Fastgate AS | Financial services | 2013 |
| Fasting & Comrades AS | Professional & scientific | 2006 |
| Fastlandsveien 66 AS | Real estate | 2010 |
| Fastlane Flower Da | Arts & recreation | 2010 |
| Fastlege Otterstrøm AS | Health & social care | 2019 |
| Fastlight AS | Real estate | 2006 |
| Fastpad AS | Professional & scientific | 2005 |
| Fastrack AS | Wholesale & retail | 2018 |
| Fasttrack AS | Information & communication | 2017 |
| Fasán AS | Wholesale & retail | 2023 |
| Fat Controller AS | | 2024 |
| Fat Forvaltning AS | Real estate | 2025 |
| Fat Lamb Holding AS | Professional & scientific | 2024 |
| Fateburet AS | Real estate | 2005 |
| Fatland Oslo AS | Manufacturing | 1984 |
| Fatter & Gutta AS | Professional & scientific | 2016 |
| Fatum Eiendom AS | Real estate | 2012 |
| Fau&Land Film AS | Information & communication | 2018 |
| Faugli Eiendom AS | Wholesale & retail | 1996 |
| Faugstadmo Håndverk AS | Manufacturing | 2026 |
| Faugstadmo&Kalmus Håndverk Da | Manufacturing | 2022 |
| Faun Gruppen AS | Real estate | 2018 |
| Faun Invest AS | | 2024 |
| Fauna Eco AS | Information & communication | 2021 |
| Fauna Eiendom AS | Real estate | 2019 |
| Fauna Kirkeristen AS | Real estate | 2026 |
| Fauna Moss AS | Real estate | 2019 |
| Fauna Nord AS | Real estate | 2018 |
| Fauna Prosjekt AS | Real estate | 2019 |
| Fauna Sør AS | Real estate | 2018 |
| Fauna Vokalkvintett Da | Arts & recreation | 2015 |
| Faunware AS | Information & communication | 2016 |
| Fauske Handelseiendom AS | Real estate | 2017 |
| Fauske Næring Eiendom AS | Real estate | 2026 |
| Fauskes Kolonial Ans | Wholesale & retail | 2000 |
| Fausko Invest AS | Transport & logistics | 2020 |
| Fauzini Arkitekter AS | Professional & scientific | 2015 |
| Fauzini Holding AS | Professional & scientific | 2005 |
| FAV4YOU AS | Wholesale & retail | 2020 |
| Faver AS | Professional & scientific | 2011 |
| Favia AS | Professional & scientific | 2026 |
| Favier Holding AS | | 2021 |
| Favn Entreprenør AS | Construction | 2009 |
| Favn Holding AS | | 2025 |
| Favn Partner AS | | 2026 |
| Favne Psykologbistand AS | Health & social care | 2020 |
| Favne Psykologbistand Holding AS | Health & social care | 2018 |
| Favner Holding AS | | 2025 |
| Favnia AS | Health & social care | 2024 |
| Favola Film Ans | Information & communication | 1989 |
| Favola Forlag AS | Information & communication | 2015 |
| Favorit Solutions AS | Wholesale & retail | 1969 |
| Favoritt Import AS | Wholesale & retail | 2020 |
| Favoritthus AS | Real estate | 2011 |
| Favour AS | Administrative & support | 2020 |
| Favrit AS | Information & communication | 2019 |
| Fawhi AS | Financial services | 2001 |
| Fawkes AS | Real estate | 2020 |
| Fawkes Invest AS | | 2022 |
| Fax Arkitekter AS | Professional & scientific | 2023 |
| Fax AS | | 2023 |
| Fax Holding AS | Professional & scientific | 2023 |
| Fayad Dental Oslo AS | Health & social care | 2026 |
| Faydust AS | | 2023 |
| Faye Holding AS | Construction | 2020 |
| Faye Invest AS | | 2018 |
| Faye Physiotherapy AS | Health & social care | 2013 |
| Fazaju AS | | 2023 |
| Fazaju I AS | | 2023 |
| Fazenda AS | Real estate | 2004 |
| Fazenda Securities AS | Financial services | 2004 |
| Fazenda Utvikling AS | Real estate | 2015 |
| Fazer Norway AS | Wholesale & retail | 2011 |