| Roh-Holding AS | | 2026 |
| Rypetoppen Adventurepark Meråker AS | Arts & recreation | 2012 |
| Rypetoppen Construction AS | Real estate | 2015 |
| Rypetoppen Holding AS | Arts & recreation | 2015 |
| Rypetoppen Safety AS | Professional & scientific | 2015 |
| Sissels AS | Hospitality | 2004 |
| Skarpe Invest AS | Construction | 2006 |
| Sko Og Vesker AS | Wholesale & retail | 2022 |
| Skolegata AS | Real estate | 2024 |
| Skurdalsvollen Nedre Ans | Agriculture & fishing | 2025 |
| Snowmotion Media AS | Information & communication | 2020 |
| Solberg Industriservice AS | Manufacturing | 2008 |
| Sonflå Malerservice AS | Construction | 2024 |
| Sportstunet AS | Real estate | 2010 |
| Statskog Meraker AS | Agriculture & fishing | 1906 |
| Steinøya Bygg AS | Construction | 2024 |
| Steinøya Eiendom AS | Real estate | 2024 |
| Stjørdalsvassdragets Klekkeri SA | Agriculture & fishing | 1992 |
| Stordalen Samdrift Da | Agriculture & fishing | 2000 |
| Stordalssaga AS | Manufacturing | 2002 |
| Strikken AS | Wholesale & retail | 1987 |
| Styrk Trening Og Kaffebar AS | Arts & recreation | 2025 |
| Sødring Holding AS | | 2026 |
| T. Farstad Invest AS | | 2020 |
| T. M. Slungård Holding AS | Manufacturing | 2005 |
| T.M. Slungård Sag & Høvleri AS | Manufacturing | 2004 |
| Ta Lappen Stjørdal-Meråker Trafikkskole AS | Education | 2005 |
| Teveldal Turistgård AS | Hospitality | 1987 |
| Teveldals Alminding Da | Agriculture & fishing | 2023 |
| Teveltunet Holding AS | | 2013 |
| Tor Arne Hetland Invest AS | Real estate | 2019 |
| Tora Berger Invest AS | Arts & recreation | 2014 |
| Trebygg Holding AS | Real estate | 2005 |
| Triangelheimen Eiendom AS | Real estate | 2022 |
| Trillium AS | Professional & scientific | 2008 |
| Trøndelag Merservice AS | Administrative & support | 2020 |
| Utina AS | Professional & scientific | 2012 |
| V&A Bygg AS | Construction | 2024 |
| Vegard Røkke AS | Construction | 2022 |
| Verform Eiendom AS | Real estate | 2019 |
| Verform Holding AS | Manufacturing | 2005 |
| VJR Eiendom AS | Real estate | 2022 |
| Vmi Eiendom AS | Real estate | 2001 |
| Verform A/S | Manufacturing | 1982 |
| Wiwi Consult AS | Professional & scientific | 2019 |
| Øyvind AS | Administrative & support | 2022 |