| Sturetech AS | Information & communication | 2019 |
| Sturla Kregnes AS | Wholesale & retail | 2007 |
| Stusslig Holding AS | Information & communication | 2021 |
| Styringspartner AS | Professional & scientific | 2017 |
| Styrkar AS | Professional & scientific | 2011 |
| Styrken AS | Real estate | 2005 |
| Stå Sterkt AS | Education | 2023 |
| Stålinvest AS | | 2025 |
| Stærkær AS | Information & communication | 2011 |
| Stølan AS | | 2024 |
| Støren Drift AS | Hospitality | 2013 |
| Støren Eiendom Da | Real estate | 2007 |
| Støren Hotel AS | Real estate | 2013 |
| Størseth AS | Construction | 2007 |
| Subkunst Da | Wholesale & retail | 2003 |
| Subsee AS | Agriculture & fishing | 2016 |
| Successus Forlag AS | Information & communication | 2026 |
| Suempol Norge AS | Wholesale & retail | 2006 |
| Suez Norway AS | Water & waste | 2025 |
| Sumart AS | Wholesale & retail | 2022 |
| Summit Property AS | Real estate | 1997 |
| Summo Area AS | Real estate | 2017 |
| Sumo Torget AS | Hospitality | 2022 |
| SUN2H AS | | 2022 |
| Sund Byggservice AS | Construction | 2017 |
| Sund Music & Entertainment AS | Arts & recreation | 2025 |
| Sunday Sweets Production AS | Manufacturing | 2024 |
| Sundmoen 9 Eiendom AS | Real estate | 2020 |
| Sundsøya Eiendom AS | Real estate | 2002 |
| Sundsøya Utvikling AS | Real estate | 2022 |
| Sundvall Eiendom AS | Real estate | 2004 |
| Sundvall Eiendom II AS | Real estate | 2004 |
| Sunh AS | Information & communication | 2021 |
| Sunland Eiendom AS | Real estate | 2002 |
| Sunlit AS | Information & communication | 2026 |
| Sunnematvalg AS | Hospitality | 2025 |
| Sunniva Eller Hedvig Da | Arts & recreation | 2026 |
| Sunnlandsvegen 2 AS | Real estate | 2024 |
| Sunnmar Invest AS | Real estate | 2016 |
| Sunset Group AS | | 2026 |
| Super Hero Invest AS | Hospitality | 2016 |
| Super Hero Pizza AS | Hospitality | 2018 |
| Super Hero Torg AS | Hospitality | 2017 |
| Superfly Holding AS | Financial services | 2016 |
| Superponni AS | Professional & scientific | 2021 |
| Supersilent AS | Arts & recreation | 2014 |
| Supersound AS | Arts & recreation | 2004 |
| Surf Technology AS | Professional & scientific | 2010 |
| Surfboard Holding AS | Wholesale & retail | 2025 |
| Surreal Design & Consulting Da | Information & communication | 2000 |
| Surt AS | Information & communication | 2018 |
| Sus Scrofa Holding AS | Administrative & support | 2012 |
| Sushime Tiller AS | Hospitality | 2024 |
| Sustainbridge Solutions AS | Information & communication | 2025 |
| Sutterøleiret AS | Real estate | 2008 |
| Sutura AS | Real estate | 2025 |
| Svaberget Trondheim AS | Real estate | 2023 |
| Svaberget Økonomi AS | Professional & scientific | 2026 |
| Sval Hydrogen AS | Manufacturing | 2024 |
| Svanbergs Plåtslageri - Olof Svanberg | Construction | 2004 |
| Svane Kjøkkenet Trondheim AS | Wholesale & retail | 2022 |
| Svane Solutions AS | Administrative & support | 2025 |
| Svanen Eiendom AS | Real estate | 1995 |
| Svanesjøen AS | Education | 2017 |
| Svanholm & Vigdal Gravferd AS | Other services | 1977 |
| Svanholm Glass AS | Construction | 1998 |
| Svarliaunet Holding AS | | 2022 |
| Svartlamon Auto AS | Hospitality | 2015 |
| Svartlamon Samvirkelag SA | Wholesale & retail | 2008 |
| Svartvika Hyttefelt SA | Construction | 2011 |
| Svartvika Utvikling AS | Real estate | 2021 |
| Svava AS | | 2020 |
| Sve Holding AS | Professional & scientific | 2005 |
| Sveberg Invest AS | Financial services | 2005 |
| Sveberg Lager AS | Real estate | 2020 |
| Svedjanveien 2 Eiendom AS | Real estate | 1960 |
| Sveetech AS | Professional & scientific | 2021 |
| Sveggen Consulting AS | Professional & scientific | 2024 |
| Svein Enok Nørstebø Nuf | Construction | 2015 |
| Svein Hallsteinsen AS | Information & communication | 2023 |
| Svein Hovdahl AS | Construction | 2006 |
| Svein Musum AS | Real estate | 1966 |
| Svelt Media AS | Information & communication | 2023 |
| Svemo Invest AS | Real estate | 2005 |
| Svendsen Invest & Holding AS | | 2016 |
| Svenska Infragruppen AS | Construction | 2018 |
| Sverre Gjervan AS | | 2022 |
| Sverres GT 3 AS | Real estate | 2007 |
| Sverresborg Elektro AS | Construction | 2023 |
| Sverresborg Fysikalske Institutt AS | Health & social care | 2018 |
| Sverresborg Malerservice AS | Construction | 2010 |
| Sverresdalsveien 26 Eiendom AS | Health & social care | 1980 |
| Svever AS | Administrative & support | 2026 |
| Svever Holding AS | Administrative & support | 2025 |
| Svinndal Holding AS | Construction | 2018 |
| Svolt AS | Administrative & support | 2017 |
| Svolt Invest AS | Hospitality | 2022 |
| SVS Melhuset AS | Real estate | 1998 |
| SVT Prosjekt AS | Professional & scientific | 2025 |
| Svåbekk Eiendom Ans | Real estate | 1989 |