| Flekskraft AS | Oslo | 2025 |
| Fleksnes Holding AS | Oslo | 2018 |
| Fleming Industrier AS | Notodden | 2012 |
| Flemington Partners Limited | W4 5Ya Chiswick | 2009 |
| Flemmen & Co Advokatfirma AS | Oslo | 2023 |
| Flemming Petroleum Engineering Aps | Dk-2850 Nærum | 2021 |
| Flender B.V. | 3077Aw Rotterdam | 2018 |
| Flender Finland OY Nuf | Fi-40530 Jyväskylä | 2026 |
| Flentec AS | Arendal | 2025 |
| Flerveis Kommunikasjon AS | Oslo | 2015 |
| Flesberg Regnskapskontor SA | Lampeland | 1971 |
| Flesjå Regnskapskontor AS | Askim | 2015 |
| Fletcher Supply Vessels Limited | Gb-Dundee Dd1 3Jt | 2018 |
| Fleten Holding AS | Førde | 1987 |
| Fleten Konsulenttjenester AS | Asker | 1996 |
| Fletens Dekor AS | Førde | 2012 |
| Fleur Agency AS | Lørenskog | 2025 |
| Fleur Invest AS | Kristiansand S | 2010 |
| Flex Drift AS | Øyer | 2015 |
| Flex LNG Management AS | Oslo | 2018 |
| Flex Mobility AS | Drammen | 2023 |
| Flex Service AS | Ådalsbruk | 2024 |
| Flex Ventures AS | Hvalstad | 2021 |
| Flexability Consulting AS | Oslo | 2006 |
| Flexfuels AS | Avaldsnes | 2023 |
| Flexi AS | Sarpsborg | 1986 |
| Flexi Management AS | Fornebu | 2005 |
| Flexibility AS | Oslo | 2017 |
| Flexibility Group AS | Oslo | 2019 |
| Flexibring AS | Hosle | 2020 |
| Flexibulk AS | Bryggja | 2003 |
| Flexid Bygg AS | Sagvåg | 2020 |
| Flexidao S.E.S. S.L. | Es-08037 Barcelona | 2021 |
| Flexidekor AS | Rakkestad | 1998 |
| Flexipharma AS | Vestby | 2013 |
| Flexonor Ans | Rolvsøy | 1997 |
| Flexskate AS | Rasta | 2017 |
| Flextech Engineering Limited | Gb - Dn31 3Ag Grimsby S Humberside | 2014 |
| Flextech Limited | Aberdeen Ab21 9Bg Scotland | 2014 |
| Flexus AS | Skien | 2018 |
| Flid Studio AS | Oslo | 2020 |
| Flindt AS | Paradis | 2013 |
| Fling AS | Sandefjord | 2005 |
| Flink AS | Sandefjord | 2022 |
| Flink Media AS | Skien | 2012 |
| Flinke Piker AS | Skjetten | 2020 |
| Flint Foto AS | Bergen | 2024 |
| Flinth AS | Sarpsborg | 2024 |
| Flinty Invest AS | Figgjo | 2007 |
| Flisa Regnskap AS | Flisa | 2000 |
| Flisateigen AS | Oslo | 2019 |
| Flisenes Konge Da | Stabekk | 2000 |
| Flix AS | Vestby | 2019 |
| Flixbus Norway Nuf | Oslo | 2024 |
| Flo Brannsikring AS | Stryn | 1998 |
| Flo Capital AS | Oslo | 2025 |
| Flo Maritime AS | Skudeneshavn | 2009 |
| Flo Marketing AS | Oslo | 2025 |
| Flo-Code AS | Nesbru | 1980 |
| Flo-Code Holding AS | Nesbru | 2023 |
| Flo-Fishrep Services AS | Longva | 2011 |
| Flo-Global AS | Oslo | 2017 |
| Float Biopro AS | Ålesund | 1998 |
| Float Port AS | Kristiansund N | 2019 |
| Floatel Interessenter AS | Oslo | 2021 |
| Floatel International AB Nuf | Oslo | 2020 |
| Floatel International Ltd. Nuf | Oslo | 2021 |
| Floatel Operations AS | Oslo | 2021 |
| Floater Services AS | Haugesund | 2008 |
| Floating AS | Kleppe | 2023 |
| Floating Maintenance Solution AS | Oslo | 2021 |
| Floating Wind Solutions AS | Oslo | 2016 |
| Flock AS | Bødalen | 2019 |
| Flocktrade AS | Tverlandet | 2022 |
| Flocon AS | Oslo | 2018 |
| Flodmans El & Energi AB Nuf | Se-621 94 Visby | 2026 |
| Floecksmühle - Energietechnik GmbH Nuf | De-52066 Aachen | 2026 |
| Floerconsult AS | Kirkenes | 2026 |
| Flofarmen AS | Alsvåg | 2022 |
| Floisbonn AS | Vesterøy | 2021 |
| Floken AS | Oslo | 2021 |
| Flokk & Fjell AS | Sandane | 2023 |
| Flokk Media Ansatte AS | Oslo | 2022 |
| Flokk Media AS | Oslo | 2020 |
| Flokkens Dyrlege AS | Strusshamn | 2025 |
| Floor Consulting AS | Ottestad | 2024 |
| Floordesign AS | Oslo | 2014 |
| Floormotion AS | Oslo | 2022 |
| Flopetrol International AS | Sandnes | 2007 |
| Flopetrol Well Barrier AS | Sandnes | 2017 |
| Flor AS | Voss | 2017 |
| Flore Energibygg AS | Brønnøysund | 2013 |
| Floreat Engineering Ltd | Aberdeen Ab12 4Wx Scotland | 2015 |
| Florence Management AS | Oslo | 2021 |
| Flores Arte AS | Mogreina | 2025 |
| Flores Invest AS | Oslo | 2016 |
| Florett Holding AS | Sarpsborg | 2004 |
| Florian AS | Hundvåg | 2007 |
| Florian Schönwiese Nuf | At-3032 Eichgraben | 2025 |
| Floriane Tiam AS | Oppegård | 2024 |