| Sagamo Invest AS | | 2021 |
| Salmonpoint AS | Manufacturing | 2020 |
| Samdal Rør AS | Construction | 1987 |
| Sandvåg AS | Real estate | 2023 |
| Scheie & Co AS | Wholesale & retail | 1989 |
| Scheie Eiendom AS | Real estate | 2019 |
| SDM Holding AS | Manufacturing | 2008 |
| Seapoint Båtsfjord AS | Manufacturing | 2022 |
| Service Partnerene AS | Manufacturing | 2021 |
| Servicerørlegger Jan AS | Construction | 2023 |
| SH Holding AS | Hospitality | 2005 |
| SH Maritime AS | Professional & scientific | 2017 |
| Sherry AS | Professional & scientific | 2024 |
| SHR Design AS | Professional & scientific | 2023 |
| Shuger AS | Information & communication | 2026 |
| Sibi AS | Manufacturing | 1999 |
| Signako AS | Financial services | 2017 |
| Sigrid Lillefosse Holding AS | Health & social care | 2024 |
| Sivert Eiendom AS | Real estate | 2005 |
| Sivert-Hallen AS | Real estate | 2015 |
| Siwraw & AS | Hospitality | 2021 |
| Sjøgrøhn AS | Professional & scientific | 1998 |
| Skaathun Bilverksted AS | Other services | 2008 |
| Skaathun Holding & Invest AS | Administrative & support | 2022 |
| Skaathun Holding & Invest II AS | | 2023 |
| Skaatun Eiendom AS | Real estate | 2010 |
| Skaatun Holding AS | Construction | 2021 |
| Skaatun Utvikling AS | Real estate | 2021 |
| Skeiestøa Boligtun AS | Real estate | 2022 |
| Skeisbotn Utbygging AS | Real estate | 2019 |
| Skorpo Sabas AS | Real estate | 2004 |
| Skotheim Holding AS | | 2018 |
| SKR Service AS | Administrative & support | 2024 |
| Sleazemania! AS | Information & communication | 2025 |
| Sloop Eiendom AS | Real estate | 2013 |
| Smaamo Holding AS | | 2024 |
| Smart Bolig Bjørnafjorden AS | Construction | 2023 |
| Smedsvig Invest AS | Real estate | 2017 |
| Smiegården AS | Real estate | 1988 |
| Smoke Signal AS | Professional & scientific | 2015 |
| Snekker Ivarsen AS | Construction | 2025 |
| SNG Investment Partners AS | Real estate | 2022 |
| Snuken Invest AS | Administrative & support | 2025 |
| Sofak AS | Other services | 1996 |
| Softcraft AS | Information & communication | 2023 |
| Sol-Vest AS | Construction | 2024 |
| Solbakken Kapital AS | | 2026 |
| Solbakken Service AS | Administrative & support | 2026 |
| Solberg Finans AS | Real estate | 2003 |
| Solid Aqua AS | Wholesale & retail | 2026 |
| Solstrand Fjord Hotel AS | Hospitality | 2002 |
| Solstrand Hotel & Bad AS | Hospitality | 2003 |
| Solstrand Økonomi AS | Professional & scientific | 2023 |
| Solstrandstykket AS | Real estate | 2023 |
| Solvang Investering AS | | 2019 |
| Solvex AS | Professional & scientific | 2024 |
| Sonde Invest AS | Real estate | 2025 |
| Sperrevik Elektro AS | Construction | 2012 |
| Stabburshaugen Eiendom II AS | Real estate | 2021 |
| Stadig Stødig Ompatakt AS | | 2023 |
| Stak Konsulenter AS | Professional & scientific | 2024 |
| Stall Moldegaard AS | Agriculture & fishing | 2018 |
| Stamfoot AS | Manufacturing | 2023 |
| Stargazer Invest AS | Real estate | 2016 |
| Stasjonsdrift Brommeland AS | Wholesale & retail | 2023 |
| Stasjonsdrift Skaar AS | Wholesale & retail | 2023 |
| Steelmill AS | | 2025 |
| Stegen 22A AS | Real estate | 2025 |
| Stig Eilef Lund Invest AS | | 2024 |
| STM AS | Construction | 2021 |
| Stordalen Utvikling AS | Real estate | 2005 |
| Storestraumen 35 AS | | 2024 |
| Storestraumen Østers AS | Agriculture & fishing | 2011 |
| Storum Holding AS | | 2008 |
| Strandconsulting AS | Health & social care | 2018 |
| Strongman Oslo AS | Education | 2020 |
| Strønevegen 28 AS | Real estate | 2018 |
| Styve Invest AS | | 2024 |
| Sun & Fun AS | Real estate | 2020 |
| Sunreef AS | Real estate | 2014 |
| Suvi Cosmetics AS | Wholesale & retail | 2026 |
| Sveinung Borgen AS | Construction | 2014 |
| Svidd Mikrobakeri AS | Manufacturing | 2019 |
| Svingas Holding AS | | 2021 |
| Sysh Holding AS | | 2025 |
| Sælen AS | | 2019 |
| Sælen Brothers AS | Real estate | 2018 |
| Sælen Økonomi AS | Professional & scientific | 2026 |
| Søgnen Eiendom AS | Real estate | 2006 |
| Søre Neset Fus Barnehage AS | Education | 2018 |
| Sørås AS | Education | 2025 |
| T Haugland Holding AS | Construction | 2014 |
| T Moberg Sko AS | Wholesale & retail | 1996 |
| T.G. Holding AS | Other services | 2005 |
| T.Nybø Spesialgraving AS | Construction | 2022 |
| Ta Inc AS | Information & communication | 2023 |
| Taivo Invest AS | Real estate | 2024 |
| Tak Og Fasadegruppen Vest AS | Construction | 2023 |
| Tak-Vest AS | Construction | 2020 |
| Tambelamb AS | Real estate | 2005 |