| Fjellgrend Infra AS | Professional & scientific | 2025 |
| Fjellh Holding AS | | 2022 |
| Fjellhamar Bruk Eiendom AS | Real estate | 2016 |
| Fjellhamar Eiendomsutvikling AS | Real estate | 2018 |
| Fjellhamarveien 44C AS | Real estate | 2012 |
| Fjellhaug Internasjonale Høgskole AS | Education | 2014 |
| Fjellheim Invest AS | Health & social care | 2006 |
| Fjellheim Kapital AS | | 2025 |
| Fjellheim Verdi AS | Financial services | 2014 |
| Fjellheim-Invest AS | Financial services | 2018 |
| Fjellheimen Utvikling AS | Real estate | 2019 |
| Fjellhus Boligselskap AS | Households | 1958 |
| Fjellhushaugen Boligselskap AS | Households | 1955 |
| Fjellhvil 3 AS | Real estate | 2021 |
| Fjellhylle AS | Education | 2021 |
| Fjellhytten AS | Professional & scientific | 2021 |
| Fjellinjen AS | Public administration | 1986 |
| Fjellinvest AS | | 2020 |
| Fjellinvest Holding AS | | 2025 |
| Fjelliv AS | Real estate | 2013 |
| Fjellkatt AS | Professional & scientific | 2026 |
| Fjellkløver Holding AS | | 2025 |
| Fjellkrantz Holding AS | | 2023 |
| Fjellmoen AS | | 2022 |
| Fjellrygg Invest AS | | 2024 |
| Fjellrype AS | | 2024 |
| Fjellsmil AS | | 2026 |
| Fjellsprengning Og Grunnarbeid AS | Construction | 2013 |
| Fjellstad Global Limited Nuf | | 2007 |
| Fjellstad Holding AS | Real estate | 1973 |
| Fjellstad Utvikling AS | Real estate | 2006 |
| Fjellstrand Sør Vann- Og Avløpslag SA | Water & waste | 2012 |
| Fjellstua Da | Real estate | 1997 |
| Fjellstutunet AS | Real estate | 1998 |
| Fjellstuveien Holding AS | Real estate | 2022 |
| Fjellstøtt Invest AS | Professional & scientific | 2008 |
| Fjelltopp AS | | 2010 |
| Fjelltoppen AS | Professional & scientific | 2021 |
| Fjelltoppen Eiendom AS | Real estate | 2021 |
| Fjelltoppen Invest AS | Professional & scientific | 2018 |
| Fjelltun Holding AS | Financial services | 2007 |
| Fjellvang Utvikling AS | Real estate | 2018 |
| Fjellvann AS | Professional & scientific | 2015 |
| Fjellvegen Boligutvikling AS | Real estate | 2023 |
| Fjellveien 8 AS | Real estate | 2025 |
| Fjellveien Skramstadseter SA | Real estate | 1966 |
| Fjellvett AS | Real estate | 2006 |
| Fjellvik AS | Professional & scientific | 2019 |
| Fjellvåg Holding AS | Professional & scientific | 2024 |
| Fjellvåg Research AS | Professional & scientific | 2025 |
| Fjelstad AS | Information & communication | 2018 |
| Fjerde Oktober AS | Professional & scientific | 2007 |
| Fjerde Sektor Konsulentgruppe Limited | Real estate | 2021 |
| Fjerdingen Utbygning AS | Real estate | 1994 |
| FJH Invest AS | Real estate | 2011 |
| Fjhm AS | | 2023 |
| Fjokketass AS | Construction | 2018 |
| Fjomp AS | | 2019 |
| Fjon Agentur AS | Other services | 2018 |
| Fjord & Foundry AS | Wholesale & retail | 2026 |
| Fjord Arkitekter AS | Professional & scientific | 2015 |
| Fjord Consulting AS | Professional & scientific | 2016 |
| Fjord Defence Group AS | Professional & scientific | 2007 |
| Fjord Defence Group ASA | Professional & scientific | 2016 |
| Fjord Dental AS | Health & social care | 2021 |
| Fjord Digital AS | Information & communication | 2021 |
| Fjord Elements AS | Manufacturing | 2025 |
| Fjord Estate AS | Information & communication | 2025 |
| Fjord Finans AS | | 2020 |
| Fjord Harmony AS | Transport & logistics | 2024 |
| Fjord Ingeniører AS | Construction | 2013 |
| Fjord Invest AS | Real estate | 1986 |
| Fjord Isotopes AS | Manufacturing | 2025 |
| Fjord IT Technology AS | Real estate | 2012 |
| Fjord Karl Johan AS | Hospitality | 2016 |
| Fjord Landskap AS | Professional & scientific | 2025 |
| Fjord Lightning AS | Wholesale & retail | 2019 |
| Fjord Og Fjellhytter AS | Real estate | 2011 |
| Fjord Potet AS | Hospitality | 2025 |
| Fjord Residence AS | Real estate | 2026 |
| Fjord Studio AS | Arts & recreation | 2018 |
| Fjord Trafikkskole AS | Education | 2016 |
| Fjord Travel Norway AS | Administrative & support | 2023 |
| Fjord Treverk AS | Construction | 2025 |
| Fjord Utvikling AS | Real estate | 2019 |
| Fjord Vaskeri Ans | Other services | 2010 |
| Fjord-Partners AS | Real estate | 2009 |
| Fjordalleen Invest AS | Real estate | 2022 |
| Fjordby Da | Administrative & support | 2003 |
| Fjordbyen Barnehage AS | Education | 2022 |
| Fjordbyen Eiendomsmegling AS | Real estate | 2022 |
| Fjordbyen Invest AS | Real estate | 2005 |
| Fjorder & Fjell AS | Wholesale & retail | 2019 |
| Fjordfrakt AS | Information & communication | 2022 |
| Fjordgaten 9 Holdco AS | Health & social care | 2023 |
| Fjordgruppen Holding AS | Construction | 2019 |
| Fjording AS | Manufacturing | 2017 |
| Fjording Holding AS | Manufacturing | 2017 |
| Fjordland AS | Wholesale & retail | 1984 |
| Fjordline Transport AS | Transport & logistics | 2025 |