| Fremrykk Rekruttering AS | Slemmestad | 2023 |
| Fremstøt AS | Ranheim | 2024 |
| Fremtid Invest AS | Strusshamn | 2015 |
| Fremtidsfrue AS | Vesterøy | 2018 |
| Fresenius Kabi Austria GmbH | At-8055 Graz | 2019 |
| Fresh Renhold AS | Gan | 2018 |
| Freshopp Vask Da | Finstadjordet | 2024 |
| Freska Norway AS | Oslo | 2015 |
| Fretheim Invest AS | Bergen | 2008 |
| Freyja Fleet Management AS | Rørvik | 2014 |
| Frez AS | Stathelle | 2025 |
| Fri Bokhandel SA | Oslo | 1998 |
| Fri Og Vill AS | Ranheim | 2019 |
| Friberg Renhold AS | Horten | 2025 |
| Frico Uthyrning AB | Sem | 2013 |
| Frico Utleie AS | Sem | 2005 |
| Friedr. Ischebeck GmbH | De-58256 Ennepetal | 2012 |
| Friendly Nordfjord AS | Stavanger | 2024 |
| Frier AS | Porsgrunn | 2023 |
| Friispirit AS | Oslo | 2015 |
| Friisvegen Invest AS | Ringebu | 2006 |
| Frilans Finans Norge AS | Oslo | 2017 |
| Friluftpåhjul AS | Morvik | 2024 |
| Friluftsguiden Helgeland AS | Nesna | 2021 |
| Friluftsliv Opplevelse Samarbeid Spenning Ans | Rælingen | 2000 |
| Frink AB | Lillestrøm | 2023 |
| Frisikt AS | Gjøvik | 2012 |
| Frisk Alpine Guide AS | Laukvik | 2021 |
| Frisk Helsebemanning AS | Oslo | 2023 |
| Frisk Pust Renhold Og Eiendom AS | Strømmen | 2026 |
| Frisk Renhold Bergen AS | Bergen | 2021 |
| Frisk Service AS | Oslo | 2011 |
| Friske Bygg AS | Nordkisa | 2020 |
| Friskren AS | Torp | 2025 |
| Frisørkjeden Tango Norge AS | Porsgrunn | 1999 |
| Fritid Og Caravan AS | Gjøvik | 2022 |
| Fritidinord AS | Mosjøen | 2023 |
| Fritidsutleie Trøndelag AS | Selbu | 2021 |
| Fritt Vilt AS | Drøbak | 2010 |
| Frittgående Selgere AS | Lillesand | 2020 |
| FRJ Holding AS | Mo I Rana | 2012 |
| Fro AS | Bodø | 2018 |
| Frode Gran Service AS | Oslo | 2010 |
| Frode Gran Service Drift AS | Oslo | 2025 |
| Frode Hetlevik Invest AS | Nesttun | 2005 |
| Frode Sjøvold AS | Røros | 2005 |
| Frodig Hagedesign AS | Laksevåg | 2016 |
| Frogh AS | Krokkleiva | 2017 |
| Frogner Snøservice Ans | Frogner | 2002 |
| Frogner Snøservice AS | Lillestrøm | 2023 |
| Frogner Vaktmestertjenester AS | Oslo | 2003 |
| Frognerkilen Facility Management AS | Oslo | 2016 |
| Frognerseteren Event AS | Oslo | 2016 |
| Frognertruls AS | Årnes | 2021 |
| Fromber AS | Oslo | 2017 |
| Fromreide Bygg Og Eiendom AS | Kjerrgarden | 2008 |
| Fron Betong Eiendom AS | Vinstra | 2007 |
| Fron Rehab Og Teknikk Ans | Vinstra | 2002 |
| Fron Stubbfresing Og Anleggsgartner AS | Sør-Fron | 2025 |
| Fronesis Da | Kleppe | 2001 |
| Frono AS | Langhus | 2017 |
| Front of House AS | Stabekk | 2023 |
| Front Renhold & Service AS | Gjerdrum | 2010 |
| Frontir Production AS | Oslo | 2007 |
| Frontmaster Vinduspuss Og Fasadevask AS | Vear | 2016 |
| Frontpartner AS | Billingstad | 2002 |
| Frosta Maskinservice AS | Frosta | 2008 |
| Frostagulrot Da | Frosta | 2020 |
| Frostbite Expeditions AS | Longyearbyen | 2026 |
| Frostec AS | Drammen | 2026 |
| Frostec Buss AS | Drammen | 2026 |
| Frostec Holding AS | Drammen | 2026 |
| Frostfire Holding AS | Kvaløya | 2024 |
| Frozen Frontiers AS | Kvaløya | 2026 |
| Fru Lykke AS | Molde | 2009 |
| Frudalen Hageservice AS | Sandnes | 2011 |
| Fruktdriv AS | Nordagutu | 2026 |
| Fruzi AS | Hundvåg | 2013 |
| Frya Invest AS | Ringebu | 1987 |
| Frya Maskin AS | Sør-Fron | 2020 |
| Fryd Event Da | Borgenhaugen | 2017 |
| Frydenbø Bilutleie AS | Kokstad | 1994 |
| Frydenbø Eiendomsdrift AS | Laksevåg | 1996 |
| Fråstad Utleie AS | Fetsund | 2023 |
| Frøya Maritime Assistanse Ans | Hamarvik | 1991 |
| Frøyas Bad AS | Kvernaland | 2023 |
| FS Capital AS | Oslo | 2020 |
| FS Maskiner AS | Vikhammer | 2020 |
| FS Team Services AS | Lørenskog | 2018 |
| FSG Anleggsmaskiner AS | Oslo | 2021 |
| FSV Crewing AS | Smøla | 2020 |
| FSV Services AS | Molde | 2015 |
| Fuglan AS | Tromsø | 1993 |
| Fuglefjell AS | Lindesnes | 2026 |
| Fuglstad Maskin AS | Mo I Rana | 2020 |
| Fugro Germany Land GmbH | De-12681 Berlin | 2021 |
| Fugro Jacques Geosurveys Inc | A1B 3X2 St. John'S Nl | 2002 |
| Fugro Marine Personnel Pte Ltd | Sg-Singapore (509012) | 2020 |
| Fugro USA Marine Inc. | 70506, Lafayette, Louisiana | 2026 |
| Fuica Multiservice AS | Oslo | 2008 |