| Forza Premium AS | Skjetten | 2023 |
| Forås Utleie AS | Namsos | 2017 |
| Fosdalen AS | Steinkjer | 2008 |
| Fosen Bil Og Utleie AS | Brekstad | 2025 |
| Fosen Brannservice AS | Bjugn | 2012 |
| Fosen Containerservice AS | Brekstad | 2012 |
| Fosen Finans AS | Brekstad | 2002 |
| Fosen Maskinutleie AS | Brekstad | 2013 |
| Fosen Utleie, Salg Og Montering AS | Bjugn | 2008 |
| Fosna Opplevelser AS | Kristiansund N | 2018 |
| Foss & Partners AS | Hamresanden | 2003 |
| Fossa AS | Alta | 2026 |
| Fossa Maskin AS | Etne | 2024 |
| Fossdal Maskin AS | Skoppum | 2021 |
| Fosseide-Landsem Maskinlag AS | Rindal | 2023 |
| Fossekallen Kontroll AS | Halden | 2022 |
| Fosser Buss AS | Fosser | 2025 |
| Fosskok SA | Lørenskog | 2025 |
| Fossmark Hogst Og Hage AS | Stanghelle | 2019 |
| Fostad AS | Kløfta | 2026 |
| Fot I Bakken AS | Bønes | 2020 |
| Fotball Media Kvinner AS | Oslo | 2023 |
| Fotballbilletter AS | Oslo | 2025 |
| Fotballeventyret AS | Oslo | 2025 |
| Fotballpakker | Dk-2500 Valby | 2023 |
| Fotballspesialisten Da | Lørenskog | 2005 |
| Fotefar Temareiser AS | Leikanger | 2009 |
| Fotlandsvegen 86 AS | Lonevåg | 2020 |
| Foto I Nord Nuf | Kvaløya | 2005 |
| Foundever Norway AS | Fyllingsdalen | 2010 |
| Fox Renhold AS | Oslo | 2024 |
| Foynhaven AS | Tønsberg | 2015 |
| FP Gruppa AS | Kleppestø | 2023 |
| FPS Kranservice AS | Fiskum | 2018 |
| FPS Viking 1 Ltd | Cy-3032 Limassol | 2024 |
| FPS Viking 2 Ltd | Cy-3032 Limassol | 2024 |
| FR Auto AS | Oppegård | 2025 |
| Fragola AS | Trondheim | 2010 |
| Fraktal AS | Lysaker | 2012 |
| Fram 20X AS | Sandnes | 2012 |
| Fram Arrangement AS | Oslo | 2003 |
| Fram Education AS | Vinterbro | 2016 |
| Fram Rekruttering Og Rådgivning AS | Oslo | 2022 |
| Fram Renholdere AS | Kongsberg | 2020 |
| Fram Tours AS | Tromsø | 2021 |
| Framberg AS | Oslo | 2026 |
| Frambring AS | Stårheim | 2012 |
| Framsenteret Drift AS | Tromsø | 1994 |
| Framtidsfylket AS | Førde | 2008 |
| Francois Marine Services Pte Ltd | Sg-609277 Singapore | 2018 |
| Francois Offshore Catering Limited | Westhill Ab32 6Fe Scotland | 2024 |
| Frank A.Jensen AS | Moss | 2025 |
| Frank Eriksen Holding AS | Porsgrunn | 2018 |
| Frank Johansen Maskin AS | Bodø | 2023 |
| Frank Og Tommys Vaktmesterservice Ans | Sem | 2000 |
| Frank Søndergaard Renhold Og Service AS | Oslo | 2017 |
| Franke Sjøberg AS | Oslo | 1985 |
| Franklyn AB | Se-114 29 Stockholm | 2022 |
| Frantali AS | Sofiemyr | 2026 |
| Frantzen Av Luna AS | Finstadjordet | 2018 |
| Franzen & Stubberud Consulting Ans | Sætre | 2002 |
| Frasers Group Trading Limited Nuf | Shirebrook Ng20 8Ry | 2026 |
| Fratrum Bemanning AS | Oslo | 2021 |
| Fraval Tyrkia AS | Ålesund | 2008 |
| Frdons-Net (Norway) Limited | London Ec1V 2Nx England | 2024 |
| Fred. Olsen & Co. AS | Oslo | 2023 |
| Fred. Olsen Crewing and Consultancy Services Ltd | Mt- Xbx 1071 Ta'Xbiex | 2012 |
| Fred. Olsen Travel AS | Oslo | 1966 |
| Freddy Ulltang AS | Førde | 2012 |
| Frederic M Scandinavien Aps | Oslo | 1999 |
| Fredrik Borgund AS | Stadlandet | 2008 |
| Fredrik Hagelund AS | Stabekk | 2023 |
| Fredrik Nilssen AS | Tiller | 2011 |
| Fredrikstad Hageservice AS | Gressvik | 2020 |
| Fredrikstad Invest AS | Rolvsøy | 2004 |
| Fredrikstad Renhold AS | Fredrikstad | 2025 |
| Fredrikstad Spillerinvest AS | Gamle Fredrikstad | 2005 |
| Fredstad Utleie AS | Lillestrøm | 2022 |
| Free Enter AS | Maura | 2014 |
| Free Speech Productions AS | Oslo | 2020 |
| Freebit Holding AS | Oslo | 1998 |
| Freedom Invest & Consulting AS | Sandefjord | 2021 |
| Freelance Euro Services (Mcmiv) Limited | Aberdeen Ab10 1Xd Skottland | 2020 |
| Freelance Euro Services (Mmdcccvii) Limited | Aberdeen Ab11 7Sl | 2014 |
| Freelance.Com Norway Nuf | Ch 1225 Chene-Bourg | 2022 |
| Freestyle Adventure AS | Oslo | 1996 |
| Freeze Your Mind AS | Ulvik | 2024 |
| Frefa AS | Torp | 2023 |
| Fregna AS | Asker | 2015 |
| Freidig Wind AS | Arendal | 2022 |
| Freja Miljø AS | Sandefjord | 2020 |
| Frejas AB Norge Nuf | Se-452 30 Strömstad | 2021 |
| Frejo AS | Søgne | 2026 |
| Frekape AS | Ridabu | 2019 |
| Frem Drift AS | Oslo | 2018 |
| Frem Holding AS | Harstad | 2004 |
| Fremgang Holding AS | Nordre Frogn | 2024 |
| Fremo Invest AS | Trondheim | 2006 |
| Fremo Oppvekst AS | Trondheim | 2019 |
| Fremogruppen AS | Trondheim | 2005 |