| Sakshauggrenda Treskerlag Da | Agriculture & fishing | 2008 |
| Salbergdalen Utmarkslag SA | Real estate | 2014 |
| Sandvaag AS | Professional & scientific | 2025 |
| Sandvollan Grunneigarlag SA | Real estate | 1952 |
| Sandvollan Samfunnshus SA | Real estate | 1968 |
| Sannan-Holding AS | | 2022 |
| Sek AS | Professional & scientific | 2020 |
| Sekulum AS | Manufacturing | 2021 |
| Selli Eiendom AS | Real estate | 2026 |
| Septentrio AS | Professional & scientific | 2017 |
| Sespe Invest AS | Wholesale & retail | 2026 |
| SG Construction AS | Professional & scientific | 2024 |
| Sjømark Byggesøknader AS | Professional & scientific | 2020 |
| Sjømark Eiendom AS | Real estate | 2004 |
| Sjømark Invest AS | Real estate | 2005 |
| Skagejr Holding AS | Real estate | 2024 |
| Skarnsundet Charter AS | Administrative & support | 2008 |
| Skarnsundet Fisk AS | Agriculture & fishing | 2018 |
| Skarnsundet Fjordsenter AS | Real estate | 1992 |
| Skoften Drift AS | Professional & scientific | 2026 |
| Skoften Holding AS | | 2023 |
| Skorsteinsrehabilitering AS | Construction | 2017 |
| Skrenten E1 AS | Real estate | 2019 |
| Skrenten E2 AS | Real estate | 2019 |
| Skrubbhaugen Kjøtt Og Melk Da | Agriculture & fishing | 2007 |
| Slapgaard Holding AS | Hospitality | 1992 |
| Slålie Holding AS | Construction | 1998 |
| Småland Eiendom AS | Real estate | 2024 |
| Snerting Ranch AS | Health & social care | 2012 |
| Software Dynamics AS | Information & communication | 2012 |
| Solbakken Holding AS | Professional & scientific | 2012 |
| Sollia Eiendomsutvikling AS | Real estate | 2013 |
| Standuppsykologen AS | Health & social care | 2022 |
| Stasjonsveien 28 AS | Real estate | 2020 |
| Stavrum Klepp AS | Construction | 2012 |
| Steinstad AS | Wholesale & retail | 2005 |
| Steinstad Eiendom AS | Real estate | 2021 |
| Stokkan Stein Og Pukk AS | Mining & quarrying | 2012 |
| Stokkan Stein Og Pukk Da | Mining & quarrying | 2011 |
| Stornes Skip AS | Administrative & support | 1984 |
| Storåker Fisk AS | Agriculture & fishing | 2024 |
| Straumen Consulting AS | Professional & scientific | 2017 |
| Straumen Industrier AS | Wholesale & retail | 2005 |
| Straumhandel AS | Wholesale & retail | 2013 |
| Straumsalt AS | Manufacturing | 2024 |
| Stuberg Holding AS | | 2023 |
| Studio F AS | Other services | 2008 |
| Ståle by AS | Arts & recreation | 2022 |
| Støre-Valen AS | Agriculture & fishing | 2017 |
| Sun Rise AS | Construction | 2022 |
| Sundsanden Samdrift Ans | Wholesale & retail | 2003 |
| Supervask Inderøy AS | Other services | 2020 |
| Surf Kombucha AS | Manufacturing | 2016 |
| Svebakk Potet Og Pastinakk Da | Agriculture & fishing | 2025 |
| Søndre Lensmyrvegen 15 AS | Real estate | 2020 |
| Søndre Lensmyrvegen 58 AS | Real estate | 2022 |
| T.N. Vangs Eiendom AS | Real estate | 2019 |
| T.N. Vangs Holding AS | Manufacturing | 2023 |
| T.N. Vangs Mek. Verksted AS | Manufacturing | 2004 |
| Tamb Utvikling AS | Real estate | 2021 |
| Tankesmia AS | Professional & scientific | 2012 |
| Team Jegtvolden AS | Hospitality | 2022 |
| Terje Vang Holding AS | Financial services | 2017 |
| Tesaker Vann AS | Professional & scientific | 2001 |
| Teveldal Sameie Da | Real estate | 2017 |
| The Aquaculture & Blue Economy Consortium (Tac) AS | Agriculture & fishing | 2025 |
| The Big 5 AS | Wholesale & retail | 2014 |
| Thor-Inge Morken Holding AS | Financial services | 2013 |
| Tira Holding AS | Real estate | 2013 |
| Tomas Snekker Og Sveis AS | Wholesale & retail | 2014 |
| Tora Altin AS | Education | 2020 |
| Trailerkom AS | Professional & scientific | 2025 |
| Trend Hårstudio Inderøy AS | Other services | 2012 |
| TRS Classic AS | Professional & scientific | 2022 |
| Truckerbæra AS | Other services | 2026 |
| Trøndervarme AS | Energy | 2020 |
| Ulvin Maskinlag SA | Agriculture & fishing | 1962 |
| Utetrivsel AS | Wholesale & retail | 2018 |
| Utgardslia Holding AS | | 2019 |
| Vangs International AS | Professional & scientific | 2012 |
| Vangsbekken Kloakklag SA | | 1988 |
| Veita Invest AS | Real estate | 2011 |
| Venappio AS | Information & communication | 2025 |
| Venna Eiendom AS | Real estate | 2006 |
| Veterinær Jørstad AS | Professional & scientific | 2026 |
| Viking Wraps AS | Hospitality | 2025 |
| Villa Sueno AS | Wholesale & retail | 2024 |
| Viosimos AS | Agriculture & fishing | 2021 |
| Virtur AS | Information & communication | 2023 |
| Vist Investment AS | | 2026 |
| Vist-Øyen AS | Arts & recreation | 2024 |
| Voa AS | | 2021 |
| Vold Tig-Sveis AS | Manufacturing | 2023 |
| Vuddu Kjøtt Og Melk Da | Agriculture & fishing | 2007 |
| Vuddu Maskin SA | Agriculture & fishing | 1963 |
| Værdal Holding AS | Financial services | 2016 |
| Water Competence AS | Education | 2015 |
| Wbe AS | Construction | 2015 |
| Welde Hageservice AS | Administrative & support | 2022 |
| Wemy Holding AS | Manufacturing | 2022 |