| Sun-Glide AS | Information & communication | 2019 |
| Sunayl Holding AS | Other services | 2016 |
| Sunde Management AS | Professional & scientific | 2012 |
| Sunden AS | Real estate | 2021 |
| Sundeveien AS | Real estate | 2025 |
| Sunon Frisør AS | Other services | 2012 |
| Sunridge AS | | 2025 |
| Sunshine Music Ans | Wholesale & retail | 1997 |
| Sunsla AS | Wholesale & retail | 2019 |
| Sunsto Holding AS | Real estate | 2024 |
| Superare AS | Real estate | 2018 |
| Supertanker AS | Financial services | 2016 |
| Supply Chain Consult AS | Professional & scientific | 2020 |
| Supply Chain Services AS | Professional & scientific | 2019 |
| Sur Lie AS | Wholesale & retail | 2025 |
| Sushi Mariero AS | Hospitality | 2019 |
| Sushi Tasta AS | Hospitality | 2018 |
| Susi Holding AS | | 2025 |
| Susiq AS | Professional & scientific | 2026 |
| Sustainable Finance AS | Professional & scientific | 2025 |
| Sustainhealth Solutions AS | Health & social care | 2024 |
| SV Equity AS | Financial services | 2009 |
| Svafas Stavanger Valve & Fitting AS | Wholesale & retail | 2006 |
| Svahl AS | Real estate | 2024 |
| Svalin Solar AS | Professional & scientific | 2016 |
| Svandalen Holding AS | Real estate | 2006 |
| Svane Kjøkken Stavanger AS | Construction | 2015 |
| Svanedal AS | Energy | 1935 |
| Svanholmen Park AS | Real estate | 2005 |
| Svankevigå AS | Real estate | 2006 |
| Svar AS | Professional & scientific | 2023 |
| Svarga AS | Real estate | 1998 |
| Svart AS | Administrative & support | 2015 |
| Svart På Kvitt SA | Arts & recreation | 2009 |
| Svartnissen AS | Arts & recreation | 2009 |
| SVC AS | Administrative & support | 1995 |
| Svein Aase Exploration AS | Professional & scientific | 2014 |
| Svein Erik Sundsteigen AS | | 2025 |
| Svein Grønnestad AS | Manufacturing | 1972 |
| Svein Sivertsen Investering AS | Financial services | 2005 |
| Svein Strøm Invest AS | Real estate | 2005 |
| Sveins Snarkjøp AS | Hospitality | 1989 |
| Sveinung Lunde AS | Financial services | 2005 |
| Sveiseriet AS | Professional & scientific | 2022 |
| Sven Kvia AS | Other services | 1987 |
| Svenni Stavanger AS | Wholesale & retail | 1994 |
| Svensen Invest AS | Real estate | 2021 |
| Sverdrup Eiendom AS | Real estate | 1992 |
| Sverdrup Rådgivning AS | Professional & scientific | 2012 |
| Sverdrup Steel AS | Wholesale & retail | 1991 |
| Sverdrup Steel International AS | Professional & scientific | 2022 |
| Sverdrup Utvikling AS | Real estate | 2025 |
| Sverdrupsgate 27 Eiendom AS | Real estate | 2015 |
| Svevi Holding AS | | 2022 |
| SVG 1 AS | Real estate | 2014 |
| SVG Bolig AS | Real estate | 2024 |
| SVG Property AS | Real estate | 2018 |
| SVG Prosjekt AS | Professional & scientific | 2023 |
| Sviland Consulting AS | Professional & scientific | 2017 |
| Sviland Utvikling AS | Real estate | 2019 |
| Svipp Solutions AS | Transport & logistics | 2024 |
| Svithun Bygg AS | Construction | 2019 |
| Svithun Finans AS | | 2025 |
| SVK AS | Construction | 2008 |
| Svånes Consulting AS | Professional & scientific | 2024 |
| Svånes Holding AS | | 2025 |
| Svånes Invest AS | Professional & scientific | 2011 |
| Swimeye AS | Wholesale & retail | 2005 |
| Syd Invest AS | Real estate | 2008 |
| Syd-Vest Eiendom AS | Real estate | 2024 |
| Sykehusparkering AS | Transport & logistics | 2003 |
| Sykkel Service AS | Other services | 2019 |
| Sykkelambassaden AS | Professional & scientific | 2025 |
| Sykkelshop Hillevåg AS | Wholesale & retail | 1991 |
| Sykt Bra AS | Education | 2014 |
| Sylvest Holding AS | Financial services | 2014 |
| Synapse AS | Professional & scientific | 2000 |
| Synergia AS | Professional & scientific | 2000 |
| Synesi AS | Professional & scientific | 2001 |
| Syng På Stavangersk AS | Hospitality | 2024 |
| Synsenteret AS | Wholesale & retail | 1985 |
| Syntax Error AS | Information & communication | 2022 |
| Synvize AS | Professional & scientific | 2024 |
| Systemair AS | Wholesale & retail | 1962 |
| Systor Vest AS | Information & communication | 2000 |
| Syvende Himmel Stavanger AS | Wholesale & retail | 2006 |
| SZN Invest AS | Financial services | 2015 |
| Sirius AS | Real estate | 1986 |
| Skagen Brygge Hotell A/S | Hospitality | 1988 |
| Stavanger Auto AS | Other services | 1961 |
| Storgaten 1 AS | Real estate | 1976 |
| Så Holding AS | Professional & scientific | 2017 |
| Sånn Koka Eg 2 AS | | 2025 |
| Sånn Koka Eg AS | | 2021 |
| Sævareid Kapital AS | | 2025 |
| Söderberg & Partners Rogaland AS | Financial services | 2016 |
| Sø Industri 1 AS | Real estate | 2022 |
| Sø Industri II AS | Real estate | 2023 |
| Sødalsveien 6 AS | Real estate | 2012 |
| Søkk AS | | 2024 |