| 2-4 Bygg AS | Real estate | 2021 |
| 3 Infra AS | Professional & scientific | 2025 |
| 3B Holding AS | | 2026 |
| 8'ERN AS | Hospitality | 2021 |
| @Home AS | Hospitality | 2020 |
| Advokatfirmaet Yrjar AS | Professional & scientific | 2020 |
| Afp Holding AS | Professional & scientific | 2015 |
| Ahi Holding AS | Wholesale & retail | 2020 |
| Alo Holding AS | Real estate | 2018 |
| Ambiente Led AS | Professional & scientific | 2012 |
| Apim Therapeutics AS | Wholesale & retail | 2009 |
| Aquarobotic AS | Professional & scientific | 2020 |
| Arctic 3D & Design AS | Professional & scientific | 2026 |
| Arke AS | Real estate | 2026 |
| Arrangementspesialisten AS | Arts & recreation | 2014 |
| Asap Invest AS | Real estate | 2016 |
| Aunhaug Maskin AS | Construction | 2012 |
| Austrått AS | Hospitality | 2011 |
| Austrått Entreprenør AS | Real estate | 2012 |
| Aviation AS | Education | 2023 |
| Avisafe AS | Information & communication | 2025 |
| Bakeribaren AS | Manufacturing | 2009 |
| Bakeritomta AS | Construction | 2013 |
| Barrock Eiendom AS | Real estate | 2005 |
| Bebo Eiendom AS | Real estate | 2024 |
| Bebo Holding AS | Wholesale & retail | 2020 |
| Beian-Tunet AS | Hospitality | 2019 |
| Beni AS | Professional & scientific | 2005 |
| Bertil Holding AS | Real estate | 2017 |
| Bicon AS | Professional & scientific | 2025 |
| Bio Shipping AS | Transport & logistics | 2021 |
| Biogass Fosen SA | Energy | 2009 |
| Bjerve Ur & Gull Brekstad AS | Wholesale & retail | 2014 |
| Bjørn Norset AS | Construction | 2013 |
| Bre Inwest AS | Real estate | 2006 |
| Brekstad Eiendom AS | Real estate | 2013 |
| Brekstad Gatekjøkken AS | Hospitality | 2025 |
| Brekstad Gjestehus AS | Hospitality | 2014 |
| Brekstad Grill AS | Hospitality | 2023 |
| Brekstad Invest AS | Real estate | 2008 |
| Brekstad Sport AS | Wholesale & retail | 1949 |
| Brekstadbukta 2 AS | Real estate | 2021 |
| Brekstadbukta 3 AS | Real estate | 2021 |
| Brekstadbukta 4 AS | Real estate | 2021 |
| Brekstadbukta 5 AS | Real estate | 2021 |
| Brekstadbukta 6 AS | Real estate | 2021 |
| Brekstadbukta 7 AS | Real estate | 2021 |
| Bunnpris Brekstad AS | Wholesale & retail | 2010 |
| Camabano Holding AS | Real estate | 2018 |
| Clean Electric AS | Manufacturing | 2021 |
| Clean Electric Integration AS | Manufacturing | 2023 |
| Comet Capital Consult AS | Professional & scientific | 2001 |
| Comfort Fosen, Kjell Lund AS | Construction | 1992 |
| Contel AS | Real estate | 2013 |
| Coop Fosen SA | Wholesale & retail | 1985 |
| Dalebakken Maskin AS | Wholesale & retail | 2017 |
| Design by Ugglum AS | Professional & scientific | 2019 |
| Dueskar Holding AS | | 2021 |
| Elektro Fosen AS | Construction | 2019 |
| Elektro Fosen Bygg AS | Real estate | 2019 |
| Elektro Fosen Holding AS | Construction | 2019 |
| Eneri Holding AS | | 2020 |
| Ervikhaug Eiendom AS | Real estate | 2013 |
| Ewho Invest AS | Professional & scientific | 2025 |
| Exit Brekstad AS | Wholesale & retail | 2011 |
| Fagerdal Eiendom AS | Real estate | 2022 |
| Fagerdal Holding AS | Other services | 2022 |
| Fagervold Garn AS | Wholesale & retail | 2021 |
| FIFTY/50 AS | Wholesale & retail | 2001 |
| Fosen Bil Og Utleie AS | Administrative & support | 2025 |
| Fosen Byggservice AS | Wholesale & retail | 2015 |
| Fosen Byggservice Eiendom AS | Real estate | 2011 |
| Fosen Containerservice AS | Administrative & support | 2012 |
| Fosen Eiendom AS | Real estate | 2003 |
| Fosen Finans AS | Administrative & support | 2002 |
| Fosen Gulvbehandling AS | Construction | 2023 |
| Fosen Invest AS | Professional & scientific | 2003 |
| Fosen Maskin AS | Construction | 2024 |
| Fosen Maskinutleie AS | Administrative & support | 2013 |
| Fosen Pizza AS | Hospitality | 2013 |
| Fosen Produsentlag SA | Transport & logistics | 1978 |
| Fosen Storsenter AS | Real estate | 2012 |
| Fosen Tools AS | Wholesale & retail | 2007 |
| Fosen Trafikkskole AS | Education | 1976 |
| Fosen Transport Holding AS | Transport & logistics | 2012 |
| Fosen Trenings- Og Kampsportsenter AS | Arts & recreation | 2004 |
| Fosna-Folket AS | Information & communication | 1986 |
| FVS Eiendom AS | Real estate | 2022 |
| FVS Entreprenør AS | Construction | 2022 |
| Gamle Regitze Drift Da | Hospitality | 2005 |
| Gerho Eiendom AS | Real estate | 2017 |
| Gerho Holding AS | Wholesale & retail | 2017 |
| Grandefjæra Dyrkingslag SA | Agriculture & fishing | 1964 |
| Greb Eiendom II AS | Real estate | 2007 |
| Grøntvedt Holding AS | Transport & logistics | 2008 |
| Grøtan Eiendom AS | Real estate | 1982 |
| Handyman Aae AS | Construction | 2023 |
| Harol Invest AS | | 2018 |
| Havblikk Ørland AS | Real estate | 2012 |
| Hel-Mar AS | | 2013 |