| Karlsaune AS | Other services | 2020 |
| Karlsaune Maskin AS | Construction | 2013 |
| Karlsaune Skogsbilvei SA | Agriculture & fishing | 1976 |
| Karlsaune Vassverk SA | Water & waste | 2018 |
| Kastra Eiendom AS | Real estate | 2017 |
| Klett Eiendom AS | Real estate | 2012 |
| Kokvold Holding AS | Health & social care | 2025 |
| KR a Tinnen Eftf AS | Wholesale & retail | 1996 |
| Krogfjord AS | Financial services | 2015 |
| KTS AS | | 2026 |
| Kverndal Tømmertransport AS | Transport & logistics | 1999 |
| Ladegu AS | Professional & scientific | 2019 |
| Lauvøy Marina SA | Transport & logistics | 2022 |
| Line Gran Hanssen AS | Other services | 2019 |
| Liparus AS | | 2017 |
| Lokalmat Fosen SA | Professional & scientific | 2022 |
| Lysstad Eiendom AS | Real estate | 2008 |
| Manche AS | Agriculture & fishing | 2019 |
| Mannvit AS | Professional & scientific | 2011 |
| Marianne Tours AS | Administrative & support | 2012 |
| Mathub Fosen SA | Administrative & support | 2023 |
| Melandseterveien Skogsveianl | Agriculture & fishing | 1995 |
| Mhkh AS | | 2023 |
| Mikknell AS | Arts & recreation | 2020 |
| Mimama Holding AS | | 2026 |
| Moan Samdrift Da | Agriculture & fishing | 2019 |
| Moan-Eiendom AS | Real estate | 2019 |
| Momyrstua Ba | Hospitality | 1975 |
| Monstad AS | Real estate | 1975 |
| Monstad Maskin AS | Administrative & support | 2015 |
| Monstadfjellet Utmarkslag SA | Real estate | 2000 |
| Morkemo Multiservice AS | Manufacturing | 2021 |
| Murvold Og Vingen Vassverk SA | Water & waste | 2001 |
| Murvold Skogsveiforening | Real estate | 1970 |
| Mælan - Grøtan Skogsvei SA | Real estate | 1982 |
| Nedre Årnes 5 AS | Real estate | 2014 |
| NEF2 AS | Agriculture & fishing | 2021 |
| Ner-Flenstad Ans | Agriculture & fishing | 2001 |
| Nittemark-Berdal Skogsvei SA | Real estate | 1976 |
| Nord-Fund AS | Construction | 2023 |
| Nordalen Landbruksservice AS | Manufacturing | 2018 |
| Nordalen Samdrift Da | Agriculture & fishing | 2006 |
| Norddalen Eiendom AS | Real estate | 2006 |
| Nordic Scallops Åfjord AS | Agriculture & fishing | 2024 |
| Nordlys Uteservice AS | Administrative & support | 2025 |
| Norgeskjell AS | Manufacturing | 2004 |
| Nortek Elektro AS | Construction | 1996 |
| Nye Nortek Eiendom AS | Real estate | 2022 |
| Ois Invest AS | Financial services | 2013 |
| Outlaw Transport AS | Transport & logistics | 2024 |
| Pa-Eiendom AS | Real estate | 2019 |
| Parken Blomster AS | Wholesale & retail | 2015 |
| Parsen AS | Professional & scientific | 2026 |
| Pedersen Coaching & Trening AS | Arts & recreation | 2025 |
| Preg Barnehager Åfjord AS | Education | 2022 |
| PS E-47 AS | Professional & scientific | 2014 |
| Raby AS | | 2023 |
| Ranheimsveien 7 AS | Real estate | 1998 |
| Rexton AS | Administrative & support | 2020 |
| Ringo Åfjord AS | Wholesale & retail | 2001 |
| Rotnes Consulting, Adventure and Development AS | Hospitality | 2008 |
| S R G Holding AS | Financial services | 2017 |
| S&S Maskinstasjon AS | Construction | 2024 |
| Skarven 555 AS | Professional & scientific | 2017 |
| Skogsveibillaget Bruliveien SA | Real estate | 1994 |
| SN Anleggspark AS | Real estate | 2005 |
| Snauvollan Holding AS | Agriculture & fishing | 2021 |
| Sport'N Drift AS | Wholesale & retail | 2000 |
| Sport'N Holding AS | Professional & scientific | 2005 |
| Sport`N Eiendom AS | Real estate | 1996 |
| Staven AS | Construction | 2026 |
| Staven R&D AS | Professional & scientific | 2012 |
| Staven Scandinavian Lodging AS | Real estate | 2006 |
| Staven Transport AS | Transport & logistics | 2022 |
| Staven-By Skogsvei SA | Real estate | 1976 |
| Stjern AS | Construction | 2019 |
| Stjern Betong AS | Manufacturing | 2012 |
| Stjern Bygg AS | Wholesale & retail | 2019 |
| Stjern Entreprenør AS | Construction | 2019 |
| Stjern Multiservice AS | Construction | 2026 |
| Stjern Samdrift Da | Agriculture & fishing | 2008 |
| Stjern Samdrift Eiendom AS | Real estate | 2007 |
| Stjern Skogsveg SA | Agriculture & fishing | 1967 |
| Stjernesludd AS | Administrative & support | 2024 |
| Stordalen Eiendom AS | Real estate | 2006 |
| Stordalen Elveeierlag SA | Other services | 1966 |
| Stordalen Samdrift Da | Agriculture & fishing | 2007 |
| Stormo Eiendomsutvikling AS | Real estate | 2025 |
| Stsselnes AS | Administrative & support | 2025 |
| Sundland Invest AS | Financial services | 2001 |
| Sve AS | Real estate | 2025 |
| Syltern Anleggspark AS | Real estate | 2022 |
| Syltern Maskin AS | Administrative & support | 2011 |
| Systemrevisjon Fosen AS | Professional & scientific | 1998 |
| Så Anleggspark AS | Real estate | 2019 |
| Søberg Anleggspark AS | Real estate | 2015 |
| Tante Pose Mosvik AS | Hospitality | 2014 |
| Tenk AS | Information & communication | 2008 |
| Tigi AS | | 2017 |
| Torsti AS | Professional & scientific | 2015 |