| Prosjektgården AS | Professional & scientific | 2021 |
| R & R Holding AS | Hospitality | 2024 |
| Reklamemontøren Skjøstad & Krogstad Ans | Professional & scientific | 1999 |
| Roxy Eiendom AS | Real estate | 2022 |
| Rye Frisør AS | Other services | 2022 |
| Rye Samdrift Da | Agriculture & fishing | 1997 |
| Rye Vasslag SA | Water & waste | 2012 |
| Satelitt Bygg AS | Construction | 2020 |
| Scand Rørfornying AS | Construction | 2025 |
| Senor Invest AS | | 2021 |
| Sevje Utvikling AS | Professional & scientific | 2013 |
| SG Jacobsen Eiendom AS | Real estate | 2006 |
| Sigve Jacobsen Holding AS | Financial services | 2005 |
| Sly AS | Wholesale & retail | 2026 |
| Snefrid & Sigurd Design Ans | Agriculture & fishing | 1994 |
| Snekkermester Per Haugnes AS | Construction | 2000 |
| Snusbonden AS | Agriculture & fishing | 2020 |
| Snuskultur AS | Wholesale & retail | 2021 |
| Solutions Available AS | Professional & scientific | 2005 |
| Sparxwear AS | Wholesale & retail | 2023 |
| Te Amo Holding AS | Real estate | 1989 |
| Thetis AS | Professional & scientific | 2005 |
| Tk-Agent Budtjenester AS | Transport & logistics | 2022 |
| Trofjord AS | Real estate | 2015 |
| Trofos - Trondheim Flis Og Snekker AS | Construction | 2024 |
| Trondheim Gravmonumenter AS | Manufacturing | 1995 |
| Trondheim Kranservice AS | Transport & logistics | 2020 |
| Trondheims Matperler SA | Other services | 2022 |
| Trøen Invest AS | Real estate | 2013 |
| Trøen Service AS | Administrative & support | 2013 |
| Trønder Byggtjenester AS | Construction | 2019 |
| Trøpa Eiendom AS | Construction | 1998 |
| Trøpa Holding AS | Real estate | 2005 |
| Upgreen AS | Professional & scientific | 2023 |
| VD Team AS | Construction | 2019 |
| Venergi AS | Agriculture & fishing | 2023 |
| Vevik Holding AS | Financial services | 2017 |
| Vi-Bo AS | Professional & scientific | 2017 |
| Vi-Bo Eiendom AS | Real estate | 2018 |
| Vinterkompaniet AS | Administrative & support | 2022 |
| Vm-Eiendom AS | Real estate | 2021 |
| Vollbakk Holding AS | Real estate | 2020 |
| Willer AS | Wholesale & retail | 2018 |
| Williamsen Holding AS | Professional & scientific | 2013 |