| Abd Eiendom AS | Real estate | 2020 |
| Abd Holding AS | Construction | 2014 |
| Abd Rørservice AS | Construction | 2007 |
| Adam Flis AS | Construction | 2022 |
| Adaptiv Bolig AS | Real estate | 2013 |
| Algen AS | Agriculture & fishing | 2020 |
| Alsetaunet Samdrift Da | Agriculture & fishing | 2007 |
| Amalie Ytterås AS | Other services | 2025 |
| Anhanger RC AS | Wholesale & retail | 2023 |
| Anleggsarbeid AS | Construction | 2013 |
| Aroma Holding AS | Real estate | 1996 |
| AS Sveaas Eiendom | Real estate | 1991 |
| Baustad Calcit AS | Professional & scientific | 1991 |
| Bella Bo AS | Real estate | 2024 |
| Berg Branding AS | Wholesale & retail | 2020 |
| Berg Oppmåling AS | Professional & scientific | 2018 |
| Bicholding AS | Real estate | 2014 |
| Bilhjelp 1 Holding AS | Other services | 2021 |
| BILHJELP1 AS | Other services | 2021 |
| BILHJELP1 Eiendom AS | Real estate | 2023 |
| Bilhuset Brekstad AS | Real estate | 2013 |
| BILVASK1 AS | Other services | 2019 |
| Borkåsen Veglag SA | Real estate | 2021 |
| Brovold Møbeldesign AS | Manufacturing | 2018 |
| Bue Bil AS | Other services | 2017 |
| Bustad Næringspark AS | Real estate | 2020 |
| Bygg Iso-Term AS | Construction | 2009 |
| Copper Eiendom AS | Real estate | 2015 |
| Dahle Rørservice AS | Construction | 2011 |
| Dahle-Høe AS | Other services | 2024 |
| Denstad Samdrift Da | Agriculture & fishing | 2007 |
| Din Frisor G.I.L Ltd Nuf | Other services | 2006 |
| Din Rørlegger Fosen AS | Construction | 2018 |
| DS Betong AS | Real estate | 2025 |
| Ds-Holding | | 2024 |
| Dybdahl Maskin AS | Construction | 2022 |
| Dybdahl Service AS | Transport & logistics | 2021 |
| Dybdahl Skurtreskerlag Ba | Agriculture & fishing | 1949 |
| Dyrendahl Bygg AS | Construction | 2005 |
| Dyrendahl Eiendom AS | Real estate | 2022 |
| Dyrendahl Holding AS | | 2025 |
| Dyrendahl Transport AS | Transport & logistics | 1997 |
| Dyrendahl Utvikling AS | Real estate | 2007 |
| E Johansen Holding AS | | 2023 |
| Ecunor Aqua AS | Agriculture & fishing | 2014 |
| Ecunor Invest AS | Professional & scientific | 2012 |
| Ej Frakt & Maskin AS | Construction | 2019 |
| Ekte Italiensk Restaurant AS | Hospitality | 2021 |
| Elpro Electro AS | Manufacturing | 2013 |
| Es Bygg & Maskin AS | Construction | 2025 |
| Fallmyr Gartneri AS | Agriculture & fishing | 2000 |
| Fiborg Eiendom AS | Real estate | 1988 |
| Finserås Holding AS | | 2020 |
| Flis Natursteinarbeide Nuf | Real estate | 2006 |
| Fosen Aqua Service AS | Professional & scientific | 2024 |
| Fosen Blikk AS | Construction | 2000 |
| Fosen Eiendomsmegling AS | Real estate | 2024 |
| Fosen Maritime Engineering AS | Professional & scientific | 2018 |
| Fosen Mek. Holding AS | Real estate | 2015 |
| Fosen Offshore AS | Real estate | 1992 |
| Fosen Seafarm Construction AS | Professional & scientific | 2017 |
| Fosen Skjønnhet AS | Other services | 2021 |
| Fosen Skogtjenester AS | Manufacturing | 2012 |
| Fosen Varmepumpesenter AS | Construction | 1991 |
| Fosen Vedsentral Da | Agriculture & fishing | 1996 |
| Fosen Yard AS | Manufacturing | 2017 |
| Fosen Yard Holding AS | Real estate | 2015 |
| Fosen Yard II AS | Manufacturing | 2015 |
| Fosenbrua AS | Construction | 2016 |
| Fosenlast AS | Transport & logistics | 1994 |
| Fosenmalern AS | Construction | 2011 |
| Fosensnekkeren Da | Construction | 1996 |
| Fosnaheim Barnehagelag SA | Education | 1989 |
| Foss Og Rokseth Grunnierlag SA | Agriculture & fishing | 2020 |
| Fossheimen AS | Real estate | 2014 |
| Frengen Eiendom AS | Real estate | 2017 |
| Fru Nelik AS | Manufacturing | 2015 |
| Furuly Holding AS | | 2024 |
| Føldalen Grunneierlag SA | Real estate | 1964 |
| Gber Holding AS | Financial services | 2014 |
| GD Dahle Holding AS | Wholesale & retail | 2005 |
| Gogani Eiendom AS | Real estate | 2023 |
| Gogani Holding AS | Health & social care | 2022 |
| Greitrå'N AS | Wholesale & retail | 2011 |
| GSK Maskin AS | Construction | 2023 |
| Gårdsnummer 1 AS | Real estate | 2019 |
| Haarberg AS | Manufacturing | 2007 |
| Harald Dyrendahl Utleie AS | Administrative & support | 2012 |
| Haugsdalen Skisenter AS | Arts & recreation | 1986 |
| Heritage Web AS | Information & communication | 2026 |
| Highlight AS | Other services | 2019 |
| Hotellet AS | Hospitality | 2008 |
| Høgsletta Boligpark AS | Real estate | 2020 |
| Høgåsen Boligselskap AS | Real estate | 1979 |
| Ia Fallmyr AS | Professional & scientific | 2022 |
| Ifjobb Holding AS | Health & social care | 2024 |
| Indre Fosen Begravelsesbyrå AS | Other services | 2016 |
| Indre Fosen Landbrukstjenester SA | Agriculture & fishing | 1995 |
| Indre Fosen Tannklinikk Drift AS | Health & social care | 2022 |
| Ingrid Denstadli AS | Other services | 2024 |