| Smartfix Mobil AS | Other services | 2020 |
| Smartinnsikt AS | Information & communication | 2025 |
| Smartly AS | Information & communication | 2015 |
| Smartseal AS | Professional & scientific | 2001 |
| Smau Arkitektur AS | Professional & scientific | 2017 |
| SMC AS | Financial services | 2012 |
| Smeaheia Carbon Storage Ans | Mining & quarrying | 2024 |
| Smed AS | | 2024 |
| Smed T Kristiansen AS | Manufacturing | 2003 |
| Smed T Kristiansen Eiendom AS | Real estate | 2003 |
| Smedvig AS | Real estate | 2006 |
| Smedvig Capital AS | Information & communication | 1985 |
| Smedvig Eiendom AS | Real estate | 1935 |
| Smedvig Finans AS | Real estate | 2021 |
| Smedvig Investment Management AS | Financial services | 2005 |
| Smedvig Kvartalet AS | Real estate | 2005 |
| Smeltedigelen AS | Professional & scientific | 2015 |
| SMG Nyland & Sons AS | | 2025 |
| Smidig Og Enkelt AS | Information & communication | 2026 |
| Smilet Holding AS | Health & social care | 2024 |
| Smilez.No AS | Health & social care | 2022 |
| Smith-Helsø Holding AS | Professional & scientific | 2018 |
| Smithgrind AS | | 2018 |
| SMK Invest AS | Administrative & support | 2005 |
| Smpl Co AS | Information & communication | 2022 |
| SMS Eiendom AS | Real estate | 2020 |
| SMT Holdco AS | | 2026 |
| Smyle AS | Professional & scientific | 2005 |
| Små Spor AS | Wholesale & retail | 2018 |
| Små Steg AS | Health & social care | 2015 |
| Smådalåsen Va-Oppgradering SA | Real estate | 2021 |
| Småtroll AS | Administrative & support | 1997 |
| Smørsgaarden Eiendom AS | Real estate | 2003 |
| SN Forvaltning AS | Real estate | 2023 |
| SN Power AS | Professional & scientific | 2013 |
| Snarveien 4 AS | Real estate | 2017 |
| Sni-Sandnes Nærings Invest AS | Real estate | 1997 |
| Snipe AS | Professional & scientific | 2026 |
| Snipp Snapp Snegle AS | Wholesale & retail | 2025 |
| SNK Online AS | Professional & scientific | 2024 |
| Snoeijink Energy AS | Professional & scientific | 2024 |
| Snoopy Fast Food AS | Hospitality | 2023 |
| Snorre R Holding AS | Other services | 2010 |
| Snowvision AS | Professional & scientific | 2016 |
| Snuffel AS | Professional & scientific | 2013 |
| Snuitide AS | Education | 2018 |
| Snuppeline AS | | 2023 |
| Snøhvit Unit Eiendom Da | Real estate | 2024 |
| Snøklokka Invest AS | Financial services | 2007 |
| Snøklokke AS | Financial services | 2005 |
| So Stavanger Home AS | Wholesale & retail | 2023 |
| Soan AS | Real estate | 2012 |
| Sobra AS | Real estate | 2005 |
| Sobrax AS | Professional & scientific | 2016 |
| Soby AS | | 2021 |
| Socexo AS | Health & social care | 2024 |
| Society Lab Holding AS | Education | 2020 |
| Society Studio AS | Education | 2019 |
| Sod AS | Information & communication | 2026 |
| Sodam AS | Wholesale & retail | 2022 |
| Sofaskribenten AS | Arts & recreation | 2015 |
| Soft AS | Real estate | 2022 |
| Softmoney AS | Professional & scientific | 2020 |
| Soil Carbon Holdings AS | | 2024 |
| Soil Invest AS | | 2016 |
| Sojama Maritime Support AS | Administrative & support | 2019 |
| Sokam Invest AS | Financial services | 2005 |
| Sol Invest AS | | 2025 |
| Sola Aircraft Center AS | Real estate | 2008 |
| Sola Engineering AS | Professional & scientific | 2024 |
| Sola Foss Holding AS | | 2026 |
| Sola Strandhage AS | Real estate | 2025 |
| Sola Takeaway AS | Hospitality | 2023 |
| Sola Taxi AS | Transport & logistics | 2021 |
| Solakrossen 11 AS | Other services | 2002 |
| Solakrossen 14 AS | Real estate | 2016 |
| Solana Invest AS | | 2024 |
| Soland Holding AS | Health & social care | 2018 |
| Solange Frisør AS | Other services | 2025 |
| Solara Holding AS | | 2023 |
| Solbakkane Utvikling AS | Real estate | 2024 |
| Solbakken AS | Real estate | 1999 |
| Solbakken Energi AS | Professional & scientific | 2021 |
| Solblomst Innovasjion AS | Manufacturing | 2024 |
| Solborgmarka AS | Real estate | 2018 |
| Solearning AS | Education | 2015 |
| Soleglad AS | Real estate | 2004 |
| Soleklar Holding AS | | 2005 |
| Solfonn Panorama AS | Real estate | 2006 |
| Solfper Invest AS | | 2021 |
| Solgård AS | | 2020 |
| Solhålå AS | Hospitality | 2016 |
| Solid Psykologkompetanse AS | Health & social care | 2012 |
| Solidar AS | Wholesale & retail | 2007 |
| Solido AS | Construction | 2024 |
| Solkroken Invest AS | | 2024 |
| Solland Eiendom AS | Real estate | 2012 |
| Solland Elektro AS | Construction | 1987 |
| Solland Holding AS | Real estate | 2022 |
| Sollandkvartalet AS | Real estate | 2007 |