| Fossberget Maleservice AS | Vallset | 2014 |
| Fossdal Invest AS | Skoppum | 2021 |
| Fossdal Montering AS | Kristiansand S | 2025 |
| Fosse Klimaservice AS | Porsgrunn | 2023 |
| Fosse Maskin Og Transport AS | Vik I Sogn | 2018 |
| Fosse MT Holding AS | Vik I Sogn | 2018 |
| Fossekall Bygg AS | Sagvåg | 2011 |
| Fossekallen Elektro AS | Trondheim | 2024 |
| Fossekallen Maskin AS | Norheimsund | 2025 |
| Fosselie VVS AS | Kristiansand S | 2013 |
| Fossen Bygg & Interiør AS | Veggli | 1984 |
| Fossen Bygg AS | Otta | 2012 |
| Fossen Elektro AS | Spydeberg | 2012 |
| Fosser El. Installasjon AS | Rakkestad | 2017 |
| Fosser Elektro AS | Løken | 1997 |
| Fosser Gass Og Varme AS | Rakkestad | 2025 |
| Fosshaga AS | Aurland | 2013 |
| Fosshaug Stillas AS | Oslo | 2007 |
| Fossheim Bygg AS | Oslo | 2006 |
| Fossheim Fjellboring AS | Uskedalen | 2021 |
| Fossheim Maskin Og Tjenester AS | Tinn Austbygd | 2022 |
| Fossholt Bygg & Service AS | Hedalen | 2015 |
| Fosskollen Utbyggingsselskap AS | Våle | 1996 |
| Fossli Holding AS | Hommelvik | 2016 |
| Fossli Maskin Og Transport AS | Hommelvik | 2020 |
| Fosslien Graveservice AS | Sande I Vestfold | 2020 |
| Fossmark Maskin AS | Forsand | 2025 |
| Fossum & Co VVS AS | Oslo | 1976 |
| Fossum & Isaksen AS | Spydeberg | 2018 |
| Fossum & Kristiansen AS | Oslo | 1988 |
| Fossum Anlegg AS | Spydeberg | 2002 |
| Fossum AS | Tyristrand | 1991 |
| Fossum Bygg AS | Mjøndalen | 2004 |
| Fossum Graveservice AS | Aurskog | 2014 |
| Fossum Graving & Transport AS | Oppaker | 2013 |
| Fossum Og Sandum AS | Tyristrand | 2006 |
| Fossum VVS AS | Sandefjord | 2022 |
| Fotech AS | Stavanger | 2020 |
| Fotland AS | Bryne | 2020 |
| Fotland Bygg AS | Bryne | 2021 |
| Fotland Holding AS | Straume | 2014 |
| Fots Drift AS | Kristiansand S | 2021 |
| Fougner Holding & Invest AS | Jar | 2022 |
| Foulingcure Aps Nuf | Dk-6064 Jordrup | 2025 |
| Foundocean Limited | Eh54 5Pq West Lothian | 2010 |
| Four Square Service AS | Bekkjarvik | 2015 |
| Fox Bygg AS | Sem | 2019 |
| Foxy Holding AS | Tønsberg | 2019 |
| FP Bygg & Skadeservice AS | Åfarnes | 2023 |
| FP Bygg Service AS | Tyristrand | 2022 |
| FP System Design AS | Rælingen | 2003 |
| Fp-Maler & Entreprenør AS | Moss | 2023 |
| FPG Invest AS | Sarpsborg | 2016 |
| FPT Robotik GmbH & Co KG | De-88279 Amtzell | 2020 |
| FR Bygg AS | Trondheim | 2019 |
| FR Bygg Og Anlegg AS | Skarnes | 2017 |
| FR Bygg Og Montasje AS | Trysil | 2021 |
| FR Byggservice AS | Levanger | 2022 |
| FR Eiendom AS | Ålgård | 2016 |
| FR Mesterbygg AS | Lampeland | 2025 |
| Fr-Tak AS | Alta | 2026 |
| Fra a Til Å Service AS | Oslo | 1997 |
| Fra Oss Gruppen AS | Spikkestad | 2021 |
| Fraberg Holding AS | Randaberg | 2019 |
| Fraccaroli E Balzan S.P.A. | Pescantina (Vr) Cap 37026 | 2023 |
| Frafjord Bygg AS | Ålgård | 2021 |
| Frafjord Rør AS | Stavanger | 2021 |
| Frafjordbrynet Renseanlegg SA | Dirdal | 2025 |
| Frale AS | Nøtterøy | 2024 |
| Framstad AS | Jaren | 2013 |
| Framtid Elektro AS | Oslo | 2022 |
| Framtidsbygg AS | Bergen | 2010 |
| Framtidsgruppa AS | Bergen | 2014 |
| Framtidshjem AS | Hemnes | 2025 |
| Franciszek Zygula Zygula | 37-300 Rzeszow | 2007 |
| Francke Bygg AS | Oslo | 1988 |
| Francks Køleindustri Aps | Dk-8940 Randers Sv | 2024 |
| Frank Amundøy AS | Kristiansund N | 2007 |
| Frank Bygg Holding AS | Brumunddal | 2015 |
| Frank Grønvold AS | Oslo | 2005 |
| Frank Havnegjerde Bygg AS | Langevåg | 1997 |
| Frank Hay AS | Kvaløya | 2005 |
| Frank Hole Maskin AS | Straumgjerde | 2015 |
| Frank Kristiansen AS | Drøbak | 2002 |
| Frank Krogstad | Se-273 98 Smedstorp | 2021 |
| Frank Lie Mur Og Flis AS | Haugesund | 2021 |
| Frank Rør AS | Skedsmokorset | 2025 |
| Frank Samseth Natursteinsmuring AS | Måndalen | 2026 |
| Frank Sletli AS | Løten | 2017 |
| Frank Sæther AS | Åndalsnes | 1994 |
| Frank Waagen Transport AS | Straume | 2014 |
| Frank's Maskin AS | Ballstad | 2012 |
| Franke Onsrud Blikkslageri AS | Oslo | 1988 |
| Franke Onsrud Eiendom AS | Oslo | 1980 |
| Franke Onsrud Invest AS | Oslo | 2017 |
| Frankenstein Graving & Transport AS | Vøyenenga | 2013 |
| Franklin Hodge Industries Ltd Nuf | B33 9Tx Birmingham | 2026 |
| Franks Montasje AS | Nord-Lenangen | 2018 |
| Franks Paller AS | Lillesand | 2019 |
| Franova AS | Skoppum | 2025 |