| Sporbarhet AS | Agriculture & fishing | 2019 |
| Sport Brand AS | Wholesale & retail | 2013 |
| Sportial AS | Information & communication | 2021 |
| Sportradar AS | Information & communication | 2001 |
| Sportshunder AS | Other services | 2010 |
| Sportshuset Melhus AS | Wholesale & retail | 2026 |
| Sportshuset Melhus AS | Wholesale & retail | 2004 |
| SPR Invest AS | | 2015 |
| Sprang AS | Wholesale & retail | 2008 |
| Spray Can AS | | 2012 |
| Spring Methods AS | Professional & scientific | 2018 |
| Sprinkler Midt-Norge AS | Wholesale & retail | 2011 |
| Spro Invest AS | | 2025 |
| Sprok AS | | 2025 |
| Sproti AS | Information & communication | 2026 |
| Språk Og Oversettelseservice AS | Professional & scientific | 2016 |
| SPW Eiendom AS | Real estate | 2024 |
| Spætt AS | Information & communication | 2023 |
| SR Betongboring/Saging AS | Construction | 2011 |
| SR Capital AS | | 2025 |
| SR Distribution AS | Wholesale & retail | 2014 |
| SR Kvalitet Eiendom AS | Real estate | 2018 |
| Sra Drift AS | Administrative & support | 2021 |
| Srch Da | Information & communication | 2024 |
| SRG International AS | Information & communication | 2005 |
| SRG Invest AS | Transport & logistics | 2005 |
| Srisan Holding AS | | 2023 |
| Srmc AS | Health & social care | 2023 |
| Sro Invest Og Forvaltning AS | Real estate | 2007 |
| Srø AS | Arts & recreation | 2026 |
| SS Bygg Og Invest AS | Hospitality | 2023 |
| SS Tuning AS | Real estate | 2021 |
| SSB Kapital AS | | 2023 |
| SSD AS | Information & communication | 2020 |
| Ssem Drift AS | Administrative & support | 2025 |
| Ssem Holding AS | | 2023 |
| Ssesh AS | Information & communication | 2024 |
| SSK Holding AS | Real estate | 2007 |
| SSL AS | | 2025 |
| SSL Holding AS | | 2021 |
| Ssu Norge AS | Education | 2025 |
| Sswangen AS | Administrative & support | 2022 |
| ST Investment AS | | 2022 |
| ST Olavs Eiendom AS | Manufacturing | 1987 |
| ST Olavs GT 10 AS | Wholesale & retail | 2007 |
| ST Olavs GT Trondheim AS | Real estate | 1997 |
| ST Olavsloppet AS | Arts & recreation | 2010 |
| ST. Eystein Bokhandel AS | Wholesale & retail | 2017 |
| ST. Olavs Plass 1 SMN AS | Real estate | 2012 |
| Stabbly Holding AS | Information & communication | 2024 |
| Stadionveien 4 Hitra AS | Real estate | 2013 |
| Stadsingeniørs Dahls GT 27 II AS | Real estate | 2014 |
| Stadsøy Da | Professional & scientific | 2005 |
| Staffio AS | Administrative & support | 2022 |
| Stafi AS | Real estate | 1992 |
| Stage Norway AS | Arts & recreation | 2022 |
| Stageless Media Ans | Professional & scientific | 2023 |
| Staka Invest AS | Professional & scientific | 2016 |
| Stakkevollveien 321 AS | Real estate | 2014 |
| Stakkevollvn. 27 Eiendom AS | Real estate | 2004 |
| Staldvik Aagård Holding AS | Real estate | 2022 |
| Staldvik Aagård Trening & Helse AS | Health & social care | 2024 |
| Stalew Holding AS | Professional & scientific | 2022 |
| Stall Bruråk Hestesenter AS | Agriculture & fishing | 2025 |
| Stammen AS | Hospitality | 2016 |
| Standard Logic AS | Financial services | 2017 |
| Standup Nidaros AS | Arts & recreation | 2025 |
| Stange Eiendom AS | Real estate | 1993 |
| Stangvik AS | Financial services | 2007 |
| Stapu Sveisekonstruksjoner AS | Manufacturing | 1999 |
| Star Eiendomsutvikling AS | Real estate | 2017 |
| Star Information Systems AS | Information & communication | 1997 |
| Star Kebab AS | Hospitality | 2019 |
| Star Property AS | Real estate | 2005 |
| Starck Hus AS | Real estate | 2016 |
| Starkhaus AS | Education | 2025 |
| Stars & Friends Scandinavia AS | Arts & recreation | 2006 |
| Startbo AS | Real estate | 2001 |
| Startuptrd AS | Professional & scientific | 2024 |
| Starup Holding AS | Hospitality | 2024 |
| Stas Hår & Bryn AS | Other services | 2002 |
| Stas Products AS | Other services | 2023 |
| Stasa Holding AS | Other services | 2023 |
| Stasjonsdrift Haltstrand AS | Wholesale & retail | 2019 |
| Stasjonsveien 55 AS | Real estate | 2007 |
| Stasø AS | | 2017 |
| Stator AS | | 2020 |
| Statsautorisert Revisor Olafsen AS | Professional & scientific | 2011 |
| Staur Aqua AS | Manufacturing | 2007 |
| Staur LS SPV 2 AS | Manufacturing | 2020 |
| Staur LS SPV III AS | Manufacturing | 2022 |
| Staur LS SPV IV AS | | 2026 |
| Staur LS SPV1 AS | Manufacturing | 2015 |
| Staurset Hovde Holding AS | | 2019 |
| Stav Hotell Eiendom AS | Real estate | 2008 |
| Stavanger Gro AS | Hospitality | 2006 |
| Staven Holding AS | | 2016 |
| Stavgården AS | Real estate | 2006 |
| Stavne Holding AS | Wholesale & retail | 2005 |
| Stavne Og Stjern Holding AS | Real estate | 2013 |