| Franshagan Bygg AS | Eidsvoll | 2014 |
| Franshagan Holding AS | Eidsvoll | 2015 |
| Frantzen & Aamlid AS | Stavanger | 2023 |
| Frantzen Bygg AS | Bergen | 2025 |
| Frantzen Holding & Invest AS | Øvre Ervik | 2009 |
| Frantzen Maskin AS | Florvåg | 2023 |
| Frantzen Maskinstasjon AS | Fosnavåg | 2000 |
| Frantzen Rør AS | Larvik | 2021 |
| Frapont AS | Sandvika | 2016 |
| Frapont SA | Es-Bj 08030 Barcelona | 2023 |
| FRD Polska Spolka Z Ograniczona Odpowiedzialnoscia Nuf | 61-021 Poznan | 2024 |
| Fre Tro AS | Frekhaug | 2025 |
| Fred AS | Skudeneshavn | 2012 |
| Fred. Olsen Ocean AS | Oslo | 1994 |
| Fred. Olsen Ocean Ltd. | Oslo | 2000 |
| Fred. Olsen Windcarrier ASA | Oslo | 2005 |
| Fred. Olsen Windcarrier International AS | Oslo | 2018 |
| Fred. Olsen Windcarrier Operations AS | Oslo | 2018 |
| Fred.Olsen Marine Services AS | Oslo | 1991 |
| Fredde Invest AS | Råde | 2022 |
| Freddy Falch AS | Oslo | 2025 |
| Freddy Mathisen AS | Hafslundsøy | 1998 |
| Freddy Persson | Østby | 2000 |
| Frede Jensen L/K Bygg | 9900 Fredrikshavn | 1999 |
| Frederic Peeters AS | Sandefjord | 2018 |
| Fredheim & Paulsby Bygg AS | Trondheim | 1997 |
| Freding Transport AS | Tverlandet | 1996 |
| Fredly Panorama Holding AS | Mo I Rana | 2018 |
| Fredrik Frost Bygg AS | Trondheim | 2026 |
| Fredrik Røseth AS | Hvasser | 2019 |
| Fredrik Øvrehus Maskin AS | Lofthus | 2024 |
| Fredrikfikser AS | Oslo | 2022 |
| Fredriksen Bygg & Boligservice AS | Porsgrunn | 2001 |
| Fredriksen Bygg & Fug AS | Skiptvet | 2023 |
| Fredriksen Graveservice AS | Holmestrand | 2026 |
| Fredriksen Håndverkerservice AS | Fannrem | 2020 |
| Fredriksen Uteområde AS | Sola | 2026 |
| Fredrikstad Asfalt AS | Borgenhaugen | 2014 |
| Fredrikstad Betongentreprenør AS | Engelsviken | 2026 |
| Fredrikstad Blikkenslagerverksted AS | Fredrikstad | 2010 |
| Fredrikstad Eiendom Service Og Bolig Utvikling AS | Fredrikstad | 2012 |
| Fredrikstad Elektro AS | Gamle Fredrikstad | 2023 |
| Fredrikstad Gass & VVS AS | Fredrikstad | 2013 |
| Fredrikstad Kjøle Montage AS | Kråkerøy | 2016 |
| Fredrikstad Kulde & Ventilasjon 1 AS | Moss | 2025 |
| Fredrikstad Maler & Bygg AS | Torp | 2023 |
| Fredrikstad Marine Elektronikk AS | Gressvik | 2024 |
| Fredrikstad Næringsbygg AS | Gressvik | 2012 |
| Fredrikstad Parkettsliperi AS | Torp | 2019 |
| Fredrikstad Rør AS | Gamle Fredrikstad | 2019 |
| Fredrikstad Rørleggerservice AS | Rolvsøy | 2008 |
| Fredrikstad Snekkerservice AS | Vesterøy | 2011 |
| Fredrikstad Spesialprosjekt AS | Sellebakk | 2022 |
| Fredrikstad Vann Og Varme AS | Gamle Fredrikstad | 2020 |
| Fredrikstad Vann Varme Og Sanitær AS | Kråkerøy | 1993 |
| Fredrikstad Ventilasjons- Og Blikkenslagerforretning AS | Gressvik | 1967 |
| Fredriksten Entreprenør AS | Greåker | 2012 |
| Fredøy AS | Skien | 2018 |
| Freeman Bygge- Og Elektrofirma AS | Oslo | 2024 |
| Freestylers GBR | 39359 Calvörde | 2007 |
| Freiberg Varmeteknikk AS | Larvik | 2016 |
| Freiblikk AS | Frei | 2017 |
| Freidig Bygg AS | Borgenhaugen | 2026 |
| Freitag AS | Stokke | 2019 |
| Frekhaug Bygg AS | Fyllingsdalen | 2021 |
| Frelar Holding AS | Kokstad | 2021 |
| Frema Vent AB | Se-461 58 Trollhättan | 2014 |
| Fremmegård Byggservice AS | Spydeberg | 2020 |
| Fremnes Bygg AS | Svolvær | 2020 |
| Fremstad & Rokseth AS | Heimdal | 1975 |
| Fremstad AS | Opphaug | 1982 |
| Fremstad AS | Oslo | 2003 |
| Fremstad Holding AS | Oslo | 2016 |
| Fremstad Maskin AS | Bybrua | 2025 |
| Fremtidbygg AS | Nordre Frogn | 2025 |
| Fremtidens Hus AS | Kongsberg | 2019 |
| Fremtidens VR Bygg AS | Kløfta | 2024 |
| Fremtids-Visjon AS | Asker | 2022 |
| Fremtidsarv AS | Kolbotn | 2025 |
| Frent AS | Åsen | 2010 |
| Freqcon GmbH | De-27336 Rethem | 2023 |
| Fres & Miljø AS | Kvelde | 2017 |
| Freskud AS | Birtavarre | 2016 |
| Fretland Bygg AS | Lærdal | 1986 |
| Freve AS | Oppdal | 2026 |
| Freve Holding AS | Oppdal | 2025 |
| Frewifo Invest AS | Gamle Fredrikstad | 2023 |
| Freyssinet Norge AS | Drammen | 2008 |
| FRG Bygg Da | Volda | 2007 |
| Fri Flyt Alta AS | Alta | 2021 |
| Fri Kraft AS | Oslo | 2026 |
| Fri-Tech Ans | Tranby | 1997 |
| Friberg Bygg Og Interiør AS | Horten | 2017 |
| Friberg Holding Invest AS | Horten | 2020 |
| Fribo Bygg AS | Opphaug | 2019 |
| Fribohus AS | Os | 2021 |
| Frico AS | Sem | 1994 |
| Frico Entreprenør AS | Sem | 1995 |
| Frico Holding AS | Sem | 1996 |
| Frictionwalls AS | Bergen | 2022 |