| Skomakeren Fra Lagunen AS | Other services | 2013 |
| Skylstad Holding AS | Financial services | 2018 |
| Skåra AS | Financial services | 2005 |
| Skårviks Eiendom AS | Real estate | 2021 |
| Skårviks Holding AS | | 2015 |
| Slottsgaten 1 AS | Real estate | 2005 |
| SM Well Engineering Services AS | Professional & scientific | 2014 |
| Smab Holding AS | | 2023 |
| Snati AS | Health & social care | 2005 |
| Soilcare AS | Water & waste | 1999 |
| Solar Eiendom AS | Real estate | 2002 |
| Solar Holding AS | Real estate | 2005 |
| Solfjord AS | Financial services | 2005 |
| Solheim Partners AS | | 2015 |
| Soliton Invest AS | Financial services | 2012 |
| Solkyst 2 AS | | 2017 |
| Solkyst AS | Financial services | 2008 |
| Solsten Holding AS | | 2022 |
| Songbird Agency / Teaterforlaget Songbird AS | Information & communication | 2011 |
| Soro Ans | | 1998 |
| Soulères Malerkost AS | Construction | 2021 |
| Spectrum Renhold AS | Administrative & support | 1990 |
| Spektral Invest AS | Real estate | 2015 |
| Spektral Invest I AS | Real estate | 2015 |
| Spinnaker Property II AS | Real estate | 2018 |
| Sprucevalley AS | Professional & scientific | 2005 |
| Stabburveien AS | Real estate | 2016 |
| Stair AS | Real estate | 2020 |
| Stargate AS | Real estate | 2022 |
| STD Invest AS | Financial services | 2006 |
| Steel Ventures AS | Professional & scientific | 2025 |
| Stefs Invest AS | | 2021 |
| STEG2 Invest AS | Real estate | 2005 |
| Stegen 2B AS | Real estate | 2019 |
| Steine Invest AS | Real estate | 2005 |
| Steinslidi Utvikling AS | Real estate | 2026 |
| Stella Vik AS | | 2025 |
| Stend Kraftverk AS | | 2021 |
| Stesve Invest AS. | Financial services | 2014 |
| Stichting Administratiekantoor Oceanteam P&U | | 2006 |
| Stifinner AS | Arts & recreation | 1998 |
| Stokkan Elektro AS | Construction | 2025 |
| Storbergen Rørleggerservice AS | Construction | 2017 |
| Storetveitvegen 167 AS | Real estate | 2019 |
| Storjohann Holding AS | Financial services | 2021 |
| Strømgaten 56 Eiendom AS | Real estate | 2003 |
| Strønen AS Av 1990 | Wholesale & retail | 1989 |
| Studienett Da | Information & communication | 2000 |
| Studio 9 AS | Professional & scientific | 2025 |
| Stödig Bemanning AS | Administrative & support | 2006 |
| Stödig Crewing I AS | Administrative & support | 1997 |
| Stödig Crewing II AS | Transport & logistics | 2018 |
| Stödig Marine Crew AS | Transport & logistics | 2018 |
| Stödig Ship Management AS | Transport & logistics | 2013 |
| Sublim Holding AS | | 2023 |
| Subsea Independent AS | Real estate | 2007 |
| Sunz Invest AS | Professional & scientific | 2008 |
| Svalvik Invest AS | Real estate | 2005 |
| Sveising Og Plasmakutting AS | Wholesale & retail | 1993 |
| Svema Vent AS | Construction | 2010 |
| Svenheim Engineering AS | Professional & scientific | 1996 |
| Sward Holding AS | | 2020 |
| Symbiose AS | Information & communication | 2023 |
| Synnøve K-G AS | Financial services | 2005 |
| Synnøve Olset AS | Administrative & support | 2023 |
| Sysendalen Invest AS | | 2024 |
| Systemtech AS | Professional & scientific | 2023 |
| Søreide Mat AS | | 2026 |
| Søreide Sjøfront AS | Real estate | 2003 |
| Sørli Invest AS | Financial services | 2005 |
| Søstrene Bjørlo AS | Financial services | 2005 |
| T & M Team Bygg AS | Construction | 2015 |
| T-1252 Film AS | Information & communication | 2020 |
| T-L Holding AS | | 2021 |
| Takvam Eiendom AS | Real estate | 2010 |
| Takvam Gruppen AS | Real estate | 2015 |
| Tangibilem Holding AS | Health & social care | 2019 |
| Tango Hotell AS | Professional & scientific | 2025 |
| TB96 Equilibrium AS | Professional & scientific | 2025 |
| TD Holding AS | Financial services | 2005 |
| Tebar Holding AS | | 2009 |
| Teige Invest AS | Real estate | 2005 |
| Teknisk Rådgivning Vest AS | Professional & scientific | 2024 |
| Tel Invest AS | Real estate | 2005 |
| Tempo Manuell- Og Fysioterapi Da | Health & social care | 2024 |
| Tendrix AS | Professional & scientific | 2025 |
| Teomann Holding AS | | 2025 |
| Tepperent AS | Other services | 2012 |
| TFK Eiendom AS | Real estate | 2021 |
| TFWB7 AS | Financial services | 2018 |
| The Beauty Room | Wholesale & retail | 2017 |
| The Next Chapter Edutainment AS | Information & communication | 2024 |
| Thermtech AS | Professional & scientific | 2002 |
| Thermtech Holding AS | Professional & scientific | 1983 |
| Thowsen Harloff Holding AS | | 2025 |
| Thuen Holding AS | Wholesale & retail | 2005 |
| Ti AS | Real estate | 1985 |
| Tid Invest AS | | 2020 |
| Tide Eiendom AS | Real estate | 1993 |
| Timber Hill AS | Real estate | 2005 |