| Stafimo AS | Manufacturing | 2022 |
| Stali AS | Wholesale & retail | 2019 |
| Stamfi AS | Real estate | 2000 |
| Stamnæss Eiendom AS | Real estate | 2013 |
| Stamnæss Invest AS | Real estate | 2011 |
| Standal Aqua AS | Agriculture & fishing | 2020 |
| Standal Bygg AS | Construction | 2008 |
| Stasjonsdrift Stokkevåg AS | Wholesale & retail | 2019 |
| Statcon AS | Information & communication | 1986 |
| Statens Hus Orkanger AS | Real estate | 2008 |
| Stave Mur AS | Construction | 2000 |
| Stave Mur Eiendom AS | Real estate | 1980 |
| Steeem Group AS | Other services | 2026 |
| Steel-X AS | Manufacturing | 2014 |
| Steffie Invest AS | Financial services | 2010 |
| Steinar Sandvik Bygg AS | Construction | 2018 |
| Steinar Trygstad Eiendom AS | Real estate | 2004 |
| Steinegga AS | Professional & scientific | 2024 |
| Steinovnen Bar & Pizzeria AS | Hospitality | 2008 |
| Steinshamn Invest AS | | 2021 |
| Stella Holding I AS | Financial services | 2005 |
| Stellanova AS | | 2024 |
| Stenseth AS | | 2014 |
| Stephansen Consulting AS | Information & communication | 2012 |
| Stephansen Tours & Excursions AS | Administrative & support | 2026 |
| Sterigmos AS | Transport & logistics | 2016 |
| Sterk Services AS | Information & communication | 2016 |
| Stersa Invest AS | | 2025 |
| Stesi Holding AS | | 2025 |
| STF AS | Financial services | 2012 |
| Stian Røyset Transport AS | Transport & logistics | 2014 |
| Stiba Invest AS | Financial services | 2005 |
| Stige Holding AS | Financial services | 2007 |
| Stikles AS | | 2019 |
| Stillas- Kran- Og Truck-Utleie AS | Administrative & support | 1997 |
| Stillasfordeg AS | Administrative & support | 2020 |
| Stockfish International AS | Manufacturing | 2022 |
| Stokke Amerika AS | Manufacturing | 1994 |
| Stokke AS | Manufacturing | 1994 |
| Stokke Mineral AS | Manufacturing | 1980 |
| Stokkeholm Holding AS | Financial services | 2007 |
| Stokkøy Eiendom AS | Real estate | 2023 |
| Stoknes Holding AS | Real estate | 2005 |
| Stolten Invest AS | Financial services | 2001 |
| Stolten Seafood AS | Administrative & support | 1996 |
| Stongnes AS | Information & communication | 2005 |
| Storbergvegen AS | Real estate | 2023 |
| Stordal Eiendom AS | Real estate | 2021 |
| Storevågen 70 AS | Real estate | 2011 |
| Storevågen Eiendom AS | Real estate | 2025 |
| Storfjord Bygg AS | Construction | 2013 |
| Storfjord Invest AS | | 2022 |
| Storfjord Iskrem Consept AS | Wholesale & retail | 2023 |
| Storgata 12 AS | Professional & scientific | 2007 |
| Storgata 23 AS | Real estate | 2014 |
| Storgata 41-43 Molde AS | Real estate | 2022 |
| Storgt 23-27 AS | Hospitality | 2015 |
| Storgt. 25 Holding AS | Financial services | 2005 |
| Storm Elektro Vest AS | Construction | 2002 |
| Storm Og Løve Eiendom AS | Real estate | 2025 |
| Storstuen Invest AS | Real estate | 2020 |
| Storøy Maritime AS | Transport & logistics | 2023 |
| Strafo Invest AS | Real estate | 1995 |
| Strakofabygget AS | Manufacturing | 2006 |
| Strand Fiskeriselskap AS | | 1986 |
| Strand Havfiske AS | Transport & logistics | 1997 |
| Strand Havfiske Finans AS | | 2025 |
| Strand Retail AS | Wholesale & retail | 2021 |
| Strand Sea Service AS | Administrative & support | 1977 |
| Strand Senior AS | Agriculture & fishing | 1999 |
| Strandafjellet Tomteutvikling AS | Real estate | 2020 |
| Strandgata 1 AS | Real estate | 2025 |
| Strandgata 53-57 Hareid AS | Real estate | 2024 |
| Strandly Holding AS | Financial services | 2014 |
| Strandman Eiendom AS | Real estate | 1996 |
| Strandman Holding AS | Manufacturing | 2014 |
| Strarek Holding AS | | 2025 |
| Stratry AS | Information & communication | 2022 |
| Straumen Utvikling AS | Real estate | 2018 |
| Stremco AS | Construction | 2008 |
| Stremco Holding AS | Real estate | 1985 |
| Strikkehjørnet AS | Wholesale & retail | 2020 |
| Stroll AS | Administrative & support | 2024 |
| Structura Invest AS | Professional & scientific | 2012 |
| Structurart AS | Professional & scientific | 2026 |
| Structuron AS | Professional & scientific | 2024 |
| Strunify AS | Information & communication | 2026 |
| Strømmegjerde Holding AS | | 2022 |
| Strømsheim Bygg AS | Construction | 2013 |
| Strømsheim Holding AS | Construction | 2013 |
| Stubberud Invest AS | | 2019 |
| Studio Halat AS | Other services | 2018 |
| Studio Jan AS | Other services | 2014 |
| Studio Ålesund Holding AS | Wholesale & retail | 2024 |
| Stuen AS | Hospitality | 2001 |
| Stuve Holding AS | | 2025 |
| Stylebysandra AS | Other services | 2022 |
| Styrehjelp.No AS | Information & communication | 2023 |
| Ståle Gjelsten Transport AS | Transport & logistics | 2005 |
| Stålkvinnen AS | Other services | 2025 |