| Flekkerøy Elektro AS | Construction | 2023 |
| Flekkerøy Kjøleservice AS | Manufacturing | 2017 |
| Flersyssler AS | Construction | 2021 |
| Fleur Invest AS | Professional & scientific | 2010 |
| Fli Eiendom AS | Real estate | 2006 |
| Flight Clinic AS | Health & social care | 2000 |
| Flis Og Murerfirma Tversland & Co AS | Construction | 2016 |
| Flisa AS | Real estate | 1994 |
| Flisa Eiendomsinvest AS | Real estate | 2007 |
| Fliskonsept AS | Wholesale & retail | 2003 |
| Flokken Invest AS | | 2024 |
| Floor Holding AS | | 2024 |
| Floresinc AS | Administrative & support | 2020 |
| Flott Lager AS | Real estate | 2018 |
| Flotthjem AS | Wholesale & retail | 2026 |
| Flottorp Holding AS | Professional & scientific | 2020 |
| FLT Holdco AS | Real estate | 2024 |
| Flua Pizza AS | Hospitality | 2023 |
| Flumen Labs SA | Professional & scientific | 2026 |
| Flxbl AS | Professional & scientific | 2020 |
| Flying Bison AS | Information & communication | 2026 |
| Flystveit Og Byremo Eiendom AS | Real estate | 2019 |
| Flyttdet AS | Transport & logistics | 2026 |
| Flyyt Social AS | Professional & scientific | 2023 |
| Flåt Invest AS | Administrative & support | 2021 |
| Fløyhus AS | Construction | 2012 |
| FM Motor AS | Wholesale & retail | 2019 |
| Fo Holding AS | Professional & scientific | 2005 |
| Fobs AS | Information & communication | 2021 |
| Fobs Holding AS | Information & communication | 2016 |
| Fogn AS | Financial services | 2005 |
| Fok AS | | 2025 |
| Folia AS | Information & communication | 2023 |
| Folk Kommunikasjon AS | Professional & scientific | 2015 |
| Folmar Holding AS | Financial services | 2018 |
| Fomle Invest AS | Wholesale & retail | 2025 |
| Fopa Invest AS | Real estate | 2025 |
| Fops AS | Professional & scientific | 2019 |
| For Fremtiden Film AS | Information & communication | 2025 |
| For Sure AS | | 2026 |
| Force Technology Training Norway AS | Education | 2005 |
| Forever Productions AS | Professional & scientific | 2015 |
| Form Massasje AS | Health & social care | 2021 |
| Form Og Flate AS | Professional & scientific | 2023 |
| Formbo AS | Real estate | 2016 |
| Formet Nordic Da | | 2026 |
| Formidable AS | Real estate | 2017 |
| Formina AS | Professional & scientific | 2021 |
| Formuefokus AS | Professional & scientific | 2026 |
| Forrut AS | Professional & scientific | 2011 |
| Forte Eiendom & Drift AS | Real estate | 2026 |
| Fortuna AS | Real estate | 1998 |
| Forvaltningspartner AS | Professional & scientific | 1996 |
| Fossbekk Brygge AS | Real estate | 2006 |
| Fossbekk Brygge II AS | Real estate | 2011 |
| Fossbekkdammen AS | Real estate | 2023 |
| Fossdal Montering AS | Construction | 2025 |
| Fosseli Holding AS | Financial services | 2018 |
| Fosselie VVS AS | Construction | 2013 |
| Fossner AS | Real estate | 2006 |
| Fotroten AS | Health & social care | 2024 |
| Fots Drift AS | Construction | 2021 |
| Fots Eiendom AS | Real estate | 2019 |
| Fots Holding AS | Real estate | 2017 |
| Four Partner Shipping AS | Transport & logistics | 1988 |
| Four Ways AS | | 2015 |
| Fourt Invest AS | | 2022 |
| Fraa-Service AS | Information & communication | 2023 |
| Frakt Partner AS | Transport & logistics | 2014 |
| Fram Utvikling AS | Health & social care | 2024 |
| Framo Invest AS | Professional & scientific | 2013 |
| Frampeik AS | Information & communication | 2008 |
| Fransk Sjarm AS | Wholesale & retail | 2025 |
| Frassino Terra AS | Professional & scientific | 2014 |
| Fratana AS | Professional & scientific | 2018 |
| Fredrik Carlsen AS | | 2023 |
| Fredrik Edling Consulting AS | Professional & scientific | 2012 |
| Fredriksholm Eiendom AS | Real estate | 1991 |
| Fredriksholm Holding AS | Real estate | 1988 |
| Fredvik Invest AS | | 2021 |
| Freekin' Larsen AS | Financial services | 2017 |
| Freshwtr Da | Wholesale & retail | 2025 |
| Fresia Invest AS | | 2023 |
| Frew Holding AS | Wholesale & retail | 2005 |
| Freya Jewellery AS | Wholesale & retail | 2024 |
| Freyasdal Holding AS | Wholesale & retail | 2004 |
| Freyasdalsveien 56 AS | Real estate | 2013 |
| Fri Verden Media Nuf | Arts & recreation | 2023 |
| Frida Invest AS | | 2021 |
| Friden Holding AS | Professional & scientific | 2010 |
| Fridtjof Oslo AS | Hospitality | 2022 |
| Frigg Agentur AS | Wholesale & retail | 2015 |
| Frigo Holding AS | | 2020 |
| Frigstad Capital Investment AS | Real estate | 2021 |
| Frigstad Engineering (Norway) AS | Professional & scientific | 2010 |
| Frigstad Invest AS | Real estate | 2009 |
| Frigstad Offshore AS | Transport & logistics | 2017 |
| Frigstad Utvikling AS | Real estate | 2020 |
| Frii of Norway AS | Wholesale & retail | 2018 |
| Frik Holding AS | Agriculture & fishing | 2021 |