| Skeidsreina Veilag SA | Real estate | 2025 |
| Skjemtegauk Da | Administrative & support | 2006 |
| Skoge AS | Professional & scientific | 2008 |
| Skolma Da | Real estate | 2002 |
| Skomakergarden AS | Administrative & support | 2015 |
| Skylesteinen AS | Professional & scientific | 2015 |
| SL Regnskap AS | Professional & scientific | 2015 |
| Smartinvest Norge AS | Real estate | 2007 |
| Smartprodukter Norge AS | Administrative & support | 2007 |
| Smeco AS | Professional & scientific | 2020 |
| Sneingen AS | Transport & logistics | 2006 |
| Snikkar Asle Mork AS | Construction | 2012 |
| Snikkarar AS | Construction | 2024 |
| Snorrebuda AS | Real estate | 2015 |
| Solaberget AS | Professional & scientific | 2018 |
| Solbu Invest AS | Real estate | 2000 |
| Solkanten AS | | 2020 |
| Solnes AS | Real estate | 1997 |
| Solstrand Eiendom AS | Real estate | 2025 |
| Solstrand Eiendom Da | Real estate | 2002 |
| Soltun Invest AS | Financial services | 1995 |
| Solvoll Invest AS | Manufacturing | 2005 |
| Sosada Invest AS | Other services | 2007 |
| Spector Investment AS | | 2021 |
| SPJ Holding AS | | 2020 |
| Sporstøl Arkitekter AS | Professional & scientific | 1991 |
| Steinarbo AS | Financial services | 2005 |
| Steinarbo Invest AS | | 2025 |
| Stian Longva AS | Professional & scientific | 2016 |
| Stilill Invest AS | Professional & scientific | 2015 |
| STJ Import AS | Wholesale & retail | 2026 |
| Storehølen AS | Real estate | 1998 |
| Stranda Industripark AS | Real estate | 2020 |
| Straumane Mat AS | Wholesale & retail | 2007 |
| Straumane Sport AS | Wholesale & retail | 2001 |
| Straumane Sport Holding AS | Financial services | 2005 |
| Stryn Pizza AS | Hospitality | 2016 |
| Studio Sunshine AS | Other services | 2010 |
| Stulo AS | | 2023 |
| Sufh Bygg AS | Real estate | 1991 |
| Sun Equity AS | Professional & scientific | 1997 |
| Sundahl AS | | 2025 |
| Sundal Engineering AS | Professional & scientific | 2000 |
| Sundgot AS | Professional & scientific | 2018 |
| Sunkost Ulsteinvik AS | Wholesale & retail | 2019 |
| Sunmar AS | | 2024 |
| Sunn Vekst AS | Arts & recreation | 2017 |
| Sunnmøre Eiendomsutvikling AS | Real estate | 2021 |
| Sunnmøre Eigedom AS | Real estate | 2023 |
| Sunnmøre Golf AS | Arts & recreation | 2001 |
| Sunnmøre Kranservice | Construction | 2013 |
| Sunnmøre Sport Holding AS | Wholesale & retail | 2006 |
| Sunnmøre Øre-Nese-Hals AS | Health & social care | 2019 |
| Supply Chain Consulting AS | Professional & scientific | 2013 |
| Susteni AS | Professional & scientific | 2026 |
| Susteni Ventures 1 AS | | 2026 |
| Svarstad Butikkeiendom AS | Real estate | 2017 |
| Svein Roppen AS | Construction | 1988 |
| Sydvestor AS | Financial services | 1999 |
| Sydvestor Troll AS | Transport & logistics | 2009 |
| Sytalaust AS | Professional & scientific | 2015 |
| Sætra Barnehage AS | Education | 2012 |
| Søre Sunnmøre Eiendomsmegling AS | Real estate | 2001 |
| Takeda Invest I AS | Financial services | 2015 |
| Takeda Invest II AS | Administrative & support | 2017 |
| Takeda Invest III AS | | 2025 |
| Takstmann Øyvind Tjervåg AS | Real estate | 2015 |
| Taliw Invest AS | Hospitality | 2021 |
| Tangen Invest AS | | 1998 |
| Teak Invest AS | | 2022 |
| Techly AS | Information & communication | 2018 |
| Tegneren AS | Professional & scientific | 2005 |
| Tegneren Eigedom AS | Professional & scientific | 1996 |
| Temte Invest AS | Professional & scientific | 2017 |
| Tenko AS | Professional & scientific | 2011 |
| Tenko Holding AS | Professional & scientific | 2009 |
| Term Holding AS | | 2020 |
| Theophos AS | | 2025 |
| Thermal Technology AS | | 2024 |
| Thorseth Maritime Consulting AS | Professional & scientific | 2015 |
| Tijera AS | Other services | 2002 |
| Timpa AS | Financial services | 2005 |
| Tingvoll-Invest AS | | 2021 |
| Toka Invest II AS | Financial services | 2015 |
| Toka Invest Junior AS | Financial services | 2015 |
| Tox AS | Financial services | 2017 |
| Triodal AS | Professional & scientific | 2026 |
| Troll Investor AS | Transport & logistics | 2001 |
| Tropehuset Ulsteinvik AS | Wholesale & retail | 2005 |
| Trygg Infra AS | Real estate | 2007 |
| Tuvneset AS | Wholesale & retail | 2016 |
| Tärntank Ship Management AB | Transport & logistics | 2007 |
| Ubs Eiendom AS | Real estate | 2018 |
| Uldo AS | | 2021 |
| Ulfstein Næringsbygg AS | Real estate | 1999 |
| Ulmar AS | Professional & scientific | 1998 |
| Ulmar Finans AS | Professional & scientific | 1997 |
| Ulmatec Eiendom AS | Real estate | 2009 |
| Ulmatec Eiendom Hareid AS | Real estate | 2021 |
| Ulsmo AS | Manufacturing | 1985 |