| Spanneveien 144 AS | Real estate | 2005 |
| Spesialist I Psykiatri Myklebust AS | Health & social care | 2025 |
| Spies Holding AS | Wholesale & retail | 2016 |
| Sport Surface AS | Wholesale & retail | 2008 |
| Squad AS | Financial services | 2024 |
| Staalehuset AS | Real estate | 2025 |
| Staalehuset Haugesund AS | Hospitality | 1993 |
| Stakland AS | | 2025 |
| Starhealth AS | Health & social care | 2022 |
| Starlabs AS | Health & social care | 2022 |
| Startmicrohousing AS | Professional & scientific | 2015 |
| Staua Produksjoner AS | Arts & recreation | 2013 |
| Stava Invest AS | Real estate | 2011 |
| Stecon AS | Professional & scientific | 2008 |
| Steinartjørna Utviklingsselskap AS | Real estate | 2016 |
| Steinsfjellet Barnehage SA | Education | 2003 |
| Stenhaug Transport AS | Transport & logistics | 2017 |
| Stensfjellet AS | | 2022 |
| Stensfjellet II AS | | 2024 |
| Step by Step AS | Real estate | 2022 |
| Sterzo Bil AS | Wholesale & retail | 2026 |
| Stian Flåten Holding AS | | 2026 |
| Stian Iversen Holding AS | | 2014 |
| Stiene AS | Education | 2025 |
| Stilrent Bygg AS | Construction | 2021 |
| Stilrent Holding AS | Construction | 2023 |
| Stjernelys AS | Education | 2023 |
| Stjørdal Sushi AS | Hospitality | 2025 |
| STK Consulting AS | Professional & scientific | 2024 |
| STL Frisør AS | Other services | 2011 |
| Stoica Marinservice AS | Administrative & support | 2025 |
| Stokka Ventilasjonsrens Da | Construction | 2024 |
| Stoltenberg Eiendom AS | Real estate | 1999 |
| Stoltenberggata 25A AS | Real estate | 2024 |
| Stoltenberggata Prosjekt AS | Real estate | 2024 |
| Storasund AS | Real estate | 2020 |
| Store Aaslandske Holding AS | Professional & scientific | 2025 |
| Store Larris AS | | 2023 |
| Storesund Eiendom AS | Real estate | 1988 |
| Storesund Invest AS | | 2024 |
| Storm & Bull Shipping AS | Transport & logistics | 1998 |
| Storøy Holding AS | Real estate | 2005 |
| Strahks Holding AS | Wholesale & retail | 2005 |
| Strandgata 106 AS | Real estate | 2021 |
| Strandgata 113 AS | Real estate | 2024 |
| Strandgata 115 AS | Real estate | 2001 |
| Strandgata 138 AS | Real estate | 2025 |
| Strandgata 140 AS | Real estate | 2025 |
| Strandgata 141-143 AS | Real estate | 2018 |
| Strandgata 165 AS | Real estate | 2025 |
| Strandgata 202 AS | Real estate | 2021 |
| Strandgata 54 AS | Real estate | 2024 |
| Strandgata 69 AS | Real estate | 2021 |
| Strandgata 96 AS | Real estate | 2003 |
| Strandgata Hotel AS | Hospitality | 2024 |
| Strandgaten 123 AS | Real estate | 2008 |
| Strandgaten 151 AS | Hospitality | 2017 |
| Strandgaten 178 AS | Real estate | 2013 |
| Strandgaten 5 AS | Real estate | 2010 |
| Strandgaten 94 AS | Real estate | 2016 |
| Strandgaten 94 SNR 4 AS | Real estate | 1940 |
| Strandgaten Maling AS | Wholesale & retail | 2025 |
| Strandgaten Pizza AS | Hospitality | 2024 |
| Strandgrill Gatekjøkken AS | Hospitality | 2025 |
| Strandlinjen 40 AS | Real estate | 2012 |
| Strandz Holding AS | | 2022 |
| Strandzonen AS | Information & communication | 2018 |
| Straumnes Holding AS | Real estate | 2006 |
| Straumr AS | Information & communication | 2023 |
| Streamlings AS | Information & communication | 2017 |
| Strikkesund AS | Wholesale & retail | 2024 |
| Strømme Eiendommer Ans | Real estate | 2017 |
| Strømme Gruppen AS | | 1989 |
| Strømø Holding AS | Financial services | 2012 |
| Strømø Invest AS | Construction | 2021 |
| Studio Essens Hud & Fotpleie AS | Other services | 2012 |
| Studio Luna Da | Wholesale & retail | 1989 |
| Studio Ski AS | Education | 2025 |
| STUDIO203 AS | Other services | 2017 |
| Stuelands Abothek AS | Hospitality | 2012 |
| Stulex Invest AS | | 2025 |
| Stutøy 10 AS | Real estate | 2023 |
| Stutøy 4 AS | Real estate | 2021 |
| Stutøy 6 AS | Real estate | 2022 |
| Stutøy 7 AS | Real estate | 2022 |
| Stutøy 8 AS | Real estate | 2022 |
| Stutøy 9 AS | Real estate | 2023 |
| Stuve Invest AS | Transport & logistics | 1997 |
| Styve Eiendom AS | Real estate | 2005 |
| Styve Staalesen AS | Professional & scientific | 2018 |
| Støle Tomt AS | Real estate | 2023 |
| Stølsmyr 16 AS | Real estate | 2019 |
| SUBC3D AS | Professional & scientific | 2016 |
| Subsea Tooling AS | Administrative & support | 2014 |
| Subseapartner AS | Mining & quarrying | 2013 |
| Subseapeople AS | Administrative & support | 2022 |
| Sufra AS | Hospitality | 2021 |
| Sunbeach Holding AS | Real estate | 2005 |
| Sundgaten Eiendom AS | Real estate | 2006 |
| Sundve Holding AS | Real estate | 2017 |