| Sande VVS AS | Construction | 2025 |
| Sandebukta Takst Og Eiendom AS | Real estate | 2025 |
| Sandehallen AS | | 2017 |
| Sandetun Fotterapi AS | Health & social care | 2013 |
| Sandsæter Consulting AS | Professional & scientific | 2010 |
| Sandvin Eiendom AS | Real estate | 1990 |
| Sandvina Bok & Leker AS | Wholesale & retail | 2003 |
| Saskali AS | Real estate | 2015 |
| Sawasdee Thai Street Food AS | Hospitality | 2025 |
| Schumacher AS | Financial services | 2005 |
| Sedai AS | | 2025 |
| Seilet Events AS | Arts & recreation | 2020 |
| Selmer Service | Manufacturing | 2013 |
| Selvik Kapital AS | Professional & scientific | 2021 |
| Selvikåsen Holding AS | Financial services | 2008 |
| Selvikåsen Invest AS | Real estate | 2005 |
| Semantikk AS | | 2005 |
| Sence AS | Other services | 2019 |
| Senq Mur & Puss AS | Construction | 2020 |
| Sensor Eiendom AS | Real estate | 2024 |
| Sensor Holding AS | Agriculture & fishing | 2019 |
| Senter for Godfølelse AS | Arts & recreation | 2019 |
| Service Partner Event AS | Arts & recreation | 1998 |
| Shank AS | Arts & recreation | 2020 |
| Simplian AS | Professional & scientific | 2005 |
| Sindsen Invest AS | | 2016 |
| Sindsen Maskin AS | Construction | 2014 |
| Siv Bygg AS | Construction | 2024 |
| Siv. Ing Sverre Melby AS | Professional & scientific | 2012 |
| Siviløkonom Martin Steinar Hagen AS | Professional & scientific | 2013 |
| Skarlsson Holding AS | | 2023 |
| Skileik AS | Wholesale & retail | 2018 |
| Skillfinder AS | Professional & scientific | 2021 |
| Skiltgravering Eiendom AS | Real estate | 2012 |
| Skinnassistanse Nuf | Other services | 2007 |
| Skjørdal Holding AS | | 2026 |
| Skjørdal Rør AS | Construction | 2026 |
| Skoger Billakkering AS | Other services | 2022 |
| Skoger Bilsenter AS | Other services | 2017 |
| Slipperiet NJB AS | Hospitality | 2024 |
| SM Pro Eiendom AS | Real estate | 2018 |
| SM Pro Holding AS | Wholesale & retail | 2019 |
| SM Produkter AS | Wholesale & retail | 2019 |
| Smakslykke AS | Wholesale & retail | 2020 |
| Smart Byggservice Viken AS | Construction | 2023 |
| SMH Klokkerjordet AS | Real estate | 2019 |
| SMP Service AS | Administrative & support | 2015 |
| Smågodt Holding AS | Financial services | 2018 |
| Soilmate AS | Professional & scientific | 2019 |
| Solidum Juridisk AS | Professional & scientific | 2025 |
| Sopala AS | Hospitality | 2001 |
| Spinnerigata 12 AS | Real estate | 2022 |
| Sportivo AS | Other services | 2008 |
| Stark Rød-Knudsen Arkitekter AS | Professional & scientific | 2003 |
| Stasjonen Frisør AS | Other services | 2026 |
| Stasjonsveiens Investeringsselskap AS | Wholesale & retail | 1983 |
| STD Glass AS | Wholesale & retail | 2022 |
| Steinar Nilsen Transport AS | Transport & logistics | 1995 |
| Stensheim AS | | 2024 |
| Stillerud Utvikling AS | Real estate | 2017 |
| Stolt Av Sande AS | Other services | 2019 |
| STS Group AS | | 2025 |
| Studio B AS | Other services | 2004 |
| Styrmoesvei 39 AS | Real estate | 2022 |
| Støpegods AS | Wholesale & retail | 2019 |
| Suluvannsveien SA | Agriculture & fishing | 1938 |
| Sva Fjellsplitting AS | Construction | 2018 |
| Svartangen Holding AS | Manufacturing | 2022 |
| Sveha Invest AS | | 2025 |
| Svendsøy Holding AS | | 2024 |
| Svingen Holding AS | Real estate | 1998 |
| Sydenhelse & Bolig AS | Real estate | 2000 |
| Søe Invest AS | | 2021 |
| Sømsalongen AS | Manufacturing | 2018 |
| T-M Auto AS | Wholesale & retail | 2015 |
| T. Asbjørnsen AS | Construction | 2008 |
| T. Sando Bygg A/S | Construction | 2008 |
| Tagg Holding AS | Wholesale & retail | 2017 |
| Tandbergåsen Invest AS | Real estate | 2021 |
| Tannlegene Aasnæs AS | Health & social care | 2005 |
| TB Sjåfør Og Transport AS | Transport & logistics | 2022 |
| Team Data Service AS | Wholesale & retail | 1994 |
| Teamworks Da | Wholesale & retail | 2017 |
| Teien Sag Og Høvleri AS | Wholesale & retail | 1991 |
| Teikne AS | Professional & scientific | 2023 |
| Tennungen AS | | 2024 |
| Terje Claussen Holding AS | | 2023 |
| Texnor Tepperenseri AS | Other services | 2025 |
| Tilhengernorge AS | Wholesale & retail | 2020 |
| Tky AS | Professional & scientific | 2007 |
| Tme Holding AS | Real estate | 2007 |
| Tomtegata Holding AS | | 2016 |
| Tordenskiold Invest AS | Real estate | 2001 |
| Tore Aamodt AS | Wholesale & retail | 1989 |
| Tore Jakob Røed AS | Construction | 2019 |
| Torggården AS | Real estate | 2002 |
| Torvet 1A Eiendom AS | Real estate | 2022 |
| Total Eiendomsprosjekt AS | Real estate | 2023 |
| Tracker AS | Information & communication | 2020 |
| Trakon Eiendom AS | Real estate | 1977 |