| Stokke Tømmertransport AS | Transport & logistics | 2014 |
| Stokmo Eiendom Og Utleie AS | Real estate | 2013 |
| Stokmo Snekkeri AS | Manufacturing | 1996 |
| Storvollen Fellesseter SA | Agriculture & fishing | 2008 |
| Storvollvegen SA | Agriculture & fishing | 2021 |
| Stærnesvegen SA | Agriculture & fishing | 1982 |
| Svea Maskin AS | Construction | 2021 |
| Sveas Eiendom AS | Real estate | 2016 |
| Selbu DataSats, Wenche Randi Krogstad og Stig Meier Berg ANS | Agriculture & fishing | 1988 |
| Selbusjøen Hotell & Gjestegård A/S | Hospitality | 1987 |
| Sørensen Bakeri AS | Manufacturing | 2023 |
| Sørflakne Bensin Og Service AS | Wholesale & retail | 1998 |
| Sørflakne Eiendom AS | Real estate | 2025 |
| Sørflakne Holding AS | Real estate | 2025 |
| Sørmo Samdrift Da | Agriculture & fishing | 2006 |
| Sørungen Pukk Og Grus AS | Mining & quarrying | 2012 |
| Sørungveien SA | Real estate | 2012 |
| T&S Snekkeriet AS | Construction | 2019 |
| T. Larsen AS | Real estate | 2016 |
| Telco Fabrikker AS | Manufacturing | 1973 |
| Tom's Tattoo AS | Other services | 2022 |
| Tomasz Jankowski | Construction | 2006 |
| Trekkspillets Og Gammeldansens Hall of Fame AS | Other services | 2024 |
| Trim 1 Treningssenter AS | Arts & recreation | 2005 |
| Trisnippen Invest AS | | 2022 |
| Trondseth Eiendom AS | Real estate | 2023 |
| Trøndelag Næringspark AS | Real estate | 2020 |
| Trøndelag Trefelling AS | Agriculture & fishing | 2017 |
| Tømmerdalsveiene SA | Construction | 1997 |
| Uglan Drift Da | Mining & quarrying | 2007 |
| Ulvenveterinær AS | Professional & scientific | 2025 |
| Usmaveien SA | Real estate | 2020 |
| Varghaugveien SA | Real estate | 1994 |
| Vestre Flønes Holding AS | | 2026 |
| Vestre Vikvarvet Utmarkslag SA | Agriculture & fishing | 2015 |
| Veterinær Ec Sjökvist AS | Professional & scientific | 2019 |
| Veterinær Eira M.A. Kachouie AS | Professional & scientific | 2024 |
| Veterinær Elin a. Nissestad AS | Professional & scientific | 2019 |
| Volsethveien SA | Real estate | 2010 |
| Winn Eiendom AS | Real estate | 2020 |
| Winn Næring AS | Real estate | 2020 |
| Zalto AS | Other services | 2019 |
| Årsøya Fritidspark AS | Arts & recreation | 1992 |
| Østby-Essand Grunneierlag SA | Agriculture & fishing | 1985 |
| Østre Vikvarvet Utmarkslag SA | Agriculture & fishing | 2022 |
| Østrungen Fellesseter SA | Agriculture & fishing | 1981 |
| Østrungen Skogsbilveglag SA | Real estate | 1988 |
| Øvre Kubjørga Skogsvei SA | Construction | 2009 |