| Silensio Da | Real estate | 2005 |
| Silje Simonsen Holding AS | Financial services | 2017 |
| Silkebris AS | Real estate | 2025 |
| Sirkel Norge AS | Wholesale & retail | 2023 |
| Sivertsen Energy AS | Professional & scientific | 2016 |
| Sjernarøy Miljø AS | Water & waste | 2007 |
| Sjøbris Invest AS | | 2026 |
| Sjøfartsgata 8 B AS | Real estate | 1996 |
| Skartveit Regnskap Og Rådgivning AS | Professional & scientific | 2021 |
| Skolen Fri AS | Education | 2026 |
| Skulstad Invest AS | Real estate | 2014 |
| SL Haga Holding AS | | 2024 |
| Slagg AS | Professional & scientific | 2022 |
| Slettebø Holding AS | | 2020 |
| Slettå Gårdsutsalg Da | Wholesale & retail | 2022 |
| Slop Eiendom AS | Administrative & support | 2016 |
| Smartin AS | Real estate | 2009 |
| Smiaa AS | Manufacturing | 2017 |
| SMP Holding AS | Professional & scientific | 2014 |
| Små Øyeblikk AS | Hospitality | 2013 |
| Snapp Leker AS | Wholesale & retail | 1996 |
| Snikkeren AS | Professional & scientific | 2025 |
| Softis Invest AS | | 2026 |
| Solan Estates AS | Real estate | 2022 |
| Solsiden Bolig Utvikling AS | Real estate | 2019 |
| Spark Equity Accelerator AS | Wholesale & retail | 2018 |
| Spelt AS | Construction | 2006 |
| Sperreport AS | Construction | 2021 |
| Spilleriet Randaberg AS | Wholesale & retail | 2019 |
| Spillskrinet Da | Wholesale & retail | 2000 |
| Sport 1 Randaberg AS | Wholesale & retail | 1999 |
| Sport 1 Supporter AS | Wholesale & retail | 2020 |
| Sqmit AS | Professional & scientific | 2019 |
| ST Invest AS | Financial services | 2015 |
| Staha Invest AS | Information & communication | 2012 |
| Stange Frakt AS | Transport & logistics | 2020 |
| Stangeland Elektro AS | Construction | 2020 |
| Stanjo AS | Construction | 2014 |
| Starttec AS | Wholesale & retail | 2015 |
| Stasjonshagen AS | Real estate | 2022 |
| Stavanger Bygg Og Boligtakst AS | Real estate | 2005 |
| Stavanger Instrumentering AS | Professional & scientific | 2014 |
| Stavanger Korrosjon AS | Wholesale & retail | 1986 |
| Stavanger Transport NTK AS | Transport & logistics | 2010 |
| Stavtjørnknuten Utbyggingsselskap AS | Real estate | 2013 |
| Stavtjørnknuten Vva AS | Water & waste | 2014 |
| Steensland Investment AS | Real estate | 2005 |
| Steinar Kolnes AS | Transport & logistics | 2014 |
| Stena Drilling AS | | 2004 |
| Sterling Breed AS | Agriculture & fishing | 2023 |
| Sterling Halibut AS | Agriculture & fishing | 2020 |
| Sterling Processing AS | Manufacturing | 2021 |
| Stjern Invest AS | | 2021 |
| Stokka Service AS | Administrative & support | 2011 |
| Stokkaveien 45 AS | Real estate | 2013 |
| Storm Selvig AS | | 2026 |
| Strandbakken 10 AS | | 2023 |
| Strandbakken Eiendom AS | Real estate | 1973 |
| Sume Consulting AS | Professional & scientific | 2021 |
| SUN2 Fauske AS | Other services | 2013 |
| SUN2 Kroken Tromsø AS | Other services | 2013 |
| SUN2 Nor AS | Other services | 2021 |
| Sunintegra AS | | 2026 |
| Super Duper Consultants AS | Professional & scientific | 2023 |
| Super Duper Ventures AS | Professional & scientific | 2021 |
| Supercharge AS | Manufacturing | 2018 |
| Supply Chain Professional AS | Administrative & support | 2021 |
| Sushi Randaberg AS | Hospitality | 2022 |
| Sveisen AS | Manufacturing | 2018 |
| Synne Invest AS | | 2020 |
| Sørbø Invest AS | Real estate | 2013 |
| Sørensen Kapital AS | | 2024 |
| Sørfjordveien 529 AS | Real estate | 1977 |
| Sørnes AS | Wholesale & retail | 2014 |
| Sørvest VVS AS | Construction | 2007 |
| T&M Services AS | Construction | 2020 |
| T.M.F. Holding AS | Financial services | 2005 |
| Taalesen Subsea AS | Professional & scientific | 2023 |
| Tagliano & Co AS | Information & communication | 2015 |
| Tangen 12 - 14 AS | Wholesale & retail | 2008 |
| Tangen 12 Eiendom AS | | 2024 |
| Tangen 13 AS | Real estate | 2025 |
| Tangen 16 AS | | 2023 |
| Tangen 2B AS | Real estate | 2024 |
| Tangen 7 Invest AS | Real estate | 2006 |
| Tangen 8 AS | Wholesale & retail | 2010 |
| Tangen Investering AS | Manufacturing | 2005 |
| Tanja Svindland Holding AS | | 2021 |
| Tannlege Marius Vevatne AS | Health & social care | 2021 |
| Tannlegene Byberg&Brun AS | Health & social care | 2020 |
| Tastagata 29 AS | Real estate | 2019 |
| Tau Energi AS | Energy | 2011 |
| Tax Holding AS | Real estate | 2008 |
| TC Eiendom AS | Real estate | 2017 |
| Team Rasmussen AS | | 2019 |
| Teccon AS | Manufacturing | 2008 |
| Teccon Holding AS | Manufacturing | 2019 |
| Tekh AS | Real estate | 2016 |
| Televeien 1 AS | Real estate | 2017 |
| Tempera AS | Professional & scientific | 2005 |