| Sommer Eiendom AS | Real estate | 2016 |
| Sommer Holding AS | Real estate | 2016 |
| Sommerblomsten Da | Wholesale & retail | 1990 |
| Sommerfelt Consulting Limited Nuf | Professional & scientific | 2021 |
| Sonett AS | Information & communication | 2022 |
| Sonus AS | Financial services | 2005 |
| Soprana Personell Norge AS | Administrative & support | 2022 |
| Sorby Solution AS | | 2026 |
| Soria Moria Vekst AS | Real estate | 2006 |
| Sorik Da | Manufacturing | 1995 |
| Sorora AS | | 2023 |
| Sosu Holding AS | | 2025 |
| Spancorp AS | Real estate | 2012 |
| Sparring Partner AS | Professional & scientific | 2000 |
| Speare AS | Health & social care | 2009 |
| Spectra Da | Professional & scientific | 1998 |
| Spilleriet AS | Arts & recreation | 1998 |
| Spir Arkitekter AS | Professional & scientific | 2018 |
| Spir Holding AS | Professional & scientific | 2018 |
| Splitkee AS | Information & communication | 2016 |
| Sport Agile Invest AS | Real estate | 2009 |
| Sportgården AS | Agriculture & fishing | 2018 |
| Sports Hub AS | Information & communication | 2022 |
| Sportsbar Brygga AS | Hospitality | 2025 |
| Spray Systems AS | Wholesale & retail | 2021 |
| Sprek Trening Tønsberg AS | Arts & recreation | 2019 |
| Spring Adventure AS | Information & communication | 2017 |
| Spring Brands AS | Wholesale & retail | 2024 |
| Spring Communication AS | Administrative & support | 2026 |
| Spring Holding AS | | 2022 |
| Spring Nova AS | Real estate | 2021 |
| Spring Nova Gruppen AS | Administrative & support | 2019 |
| Spring Nova Holding AS | Professional & scientific | 2019 |
| Spring Nova Logistikk AS | Professional & scientific | 2022 |
| Spring Respons Og Logistikk AS | Administrative & support | 2023 |
| Spring Shop AS | Professional & scientific | 2018 |
| Springline AS | Wholesale & retail | 2024 |
| Spurv Invest AS | | 2012 |
| SPV Good Game AS | | 2021 |
| SPV Waka AS | | 2022 |
| Spydspiss Capital 1 AS | | 2022 |
| Spåtind Sport Hotel AS | Hospitality | 2001 |
| SR Gruppen AS | | 2023 |
| SRS Productions AS | Wholesale & retail | 2020 |
| ST Olav Helseklinikk Wellness Da | Other services | 2023 |
| ST Olavsgate 28 AS | Real estate | 2002 |
| ST. Olavs GT. 22 AS | Real estate | 2015 |
| ST. Olavsgate 4 AS | Real estate | 1999 |
| St.Olav Helseklinikk AS | Health & social care | 2008 |
| Staby AS | Real estate | 1946 |
| Stall Roberg AS | Real estate | 2025 |
| Standard Kafe AS | Hospitality | 2011 |
| Stanges Gårdsprodukter AS | Manufacturing | 1994 |
| Starfruit Invest AS | | 2025 |
| Starlight Capital AS | Real estate | 2015 |
| Stasjonen AS | Hospitality | 2017 |
| Stasjonen Business Lounge AS | Real estate | 2018 |
| Stasjonsveien Eiendom AS | Real estate | 2013 |
| Staut Barberstue AS | Other services | 2020 |
| Steak AS | Hospitality | 2016 |
| Stedjeberg AS | | 2006 |
| Stein Kvalheim AS | Education | 2008 |
| Steinan B7 AS | Real estate | 2023 |
| Steinriket Holding AS | Manufacturing | 2016 |
| Stenbråten Forvaltning AS | | 2026 |
| Stendhal's AS | Professional & scientific | 2023 |
| Stenmalen Dyreklinikk AS | Professional & scientific | 2020 |
| Stensarmen 3C AS | Real estate | 2008 |
| Stenstrøm Invest AS | Financial services | 2013 |
| Sterk Kropp AS | Health & social care | 2020 |
| Stetind Advokat AS | Professional & scientific | 2020 |
| Stex AS | Construction | 2013 |
| Stex Bygg AS | Construction | 2020 |
| Stigma 4 Hair AS | Wholesale & retail | 2012 |
| Stockmaster Solutions AS | Information & communication | 2023 |
| Stoltenbergs Gate 48 AS | Real estate | 2016 |
| Stoltenbergsgt 38 AS | Real estate | 2017 |
| Storfjell Holding AS | Real estate | 2017 |
| Storgata 43 Horten AS | Real estate | 2016 |
| Storgaten 11 AS | Real estate | 1980 |
| Storgaten 17 Tønsberg AS | Real estate | 2022 |
| Storgaten 28 Tønsberg AS | Real estate | 1908 |
| Storgaten 2B AS | Real estate | 2019 |
| Storgaten 2B Tønsberg AS | Real estate | 2005 |
| Storgaten 30-32 AS | Real estate | 2020 |
| Storgaten 31 AS | Real estate | 2019 |
| Storgaten 33 Tønsberg AS | Real estate | 2019 |
| Storgaten 49 AS | Real estate | 2024 |
| Storgaten 51 Tønsberg AS | Real estate | 2011 |
| Storgaten 7 Sandefjord AS | Real estate | 1978 |
| Storgaten Eiendom AS | Real estate | 2000 |
| Storgt. 18-20 AS | Real estate | 2005 |
| Storm Forsikring AS | Financial services | 2025 |
| Storm Gruppen AS | | 2025 |
| Storsteinen AS | Wholesale & retail | 2005 |
| Strand Hudpleie & Velvære AS | Other services | 2011 |
| Strandbakken Invest AS | Financial services | 2005 |
| Stratus AS | Real estate | 2005 |
| Straverso AS | Information & communication | 2026 |
| Streamline Eiendom AS | Real estate | 2020 |