| Rumen & Inga Holding AS | | 2026 |
| Rune Mortensen AS | Professional & scientific | 2013 |
| Ruva AS | Real estate | 2017 |
| Ryfylket Ørret AS | Agriculture & fishing | 2018 |
| S.Lende Holding AS | Construction | 2007 |
| Sagodden AS | Real estate | 1979 |
| Sajoda AS | Real estate | 2026 |
| Sand Bakken Eiendom AS | Real estate | 2017 |
| Sand Nilsen Holding AS | | 2023 |
| Sander Capital AS | | 2026 |
| SB Tech AS | Information & communication | 2022 |
| Scandilux AS | Wholesale & retail | 2026 |
| Scandinavian Infra AS | Professional & scientific | 2021 |
| SD Consulting AS | Professional & scientific | 2022 |
| Seland Ranch AS | Construction | 2024 |
| Seland Skailand Gruppen AS | Construction | 2025 |
| Selura AS | Real estate | 2018 |
| Serai AS | Professional & scientific | 2020 |
| Serbia Scandinavia Vulovic Import Og Eksport AS | Wholesale & retail | 2026 |
| SG Fiber AS | Information & communication | 2025 |
| SGS AS | Real estate | 2006 |
| Sigjan AS | Real estate | 2023 |
| Sildenes AS | Agriculture & fishing | 2017 |
| Siljedal Butikkdrift AS | Wholesale & retail | 2023 |
| Sirnes Bakken AS | Arts & recreation | 2026 |
| Sirnes Eiendom AS | Real estate | 2013 |
| Sirnes Holding AS | Wholesale & retail | 1991 |
| Skailand Maskin & Turbin AS | Manufacturing | 2012 |
| Skalstad Eiendom AS | Real estate | 1997 |
| Skar Iversen Invest AS | | 2021 |
| Skarpenes AS | Professional & scientific | 2024 |
| Skaug Hansen AS | Real estate | 2021 |
| Skin Tonic Flekkefjord AS | Wholesale & retail | 2024 |
| Skogheim Kloster AS | Financial services | 2005 |
| Skogseide Holding AS | | 2021 |
| Skotos AS | | 2023 |
| Smaabyen Flekkefjord SA | Professional & scientific | 2015 |
| Smalltown Supersound AS | Information & communication | 2015 |
| Sol Blubio AS | Manufacturing | 2017 |
| Solware AS | Information & communication | 2023 |
| Sool Invest AS | | 2021 |
| Spartan Media Nordic AS | Professional & scientific | 2021 |
| Spor 1 AS | Real estate | 2006 |
| Spor 2 Eiendom AS | Real estate | 2021 |
| SRJ AS | Real estate | 2021 |
| Stampen Vannverk SA | Water & waste | 2015 |
| Stangborli Bygg AS | Construction | 2014 |
| Stangborli Eiendomsutvikling AS | Real estate | 2017 |
| Stardust Investment AS | Professional & scientific | 2025 |
| Stormlinker AS | Professional & scientific | 2016 |
| Stornes Ans | Wholesale & retail | 1989 |
| Stornes Holding AS | Real estate | 2002 |
| Strandgaten Eiendom AS | Real estate | 1987 |
| Strømland Designs AS | Information & communication | 2023 |
| Strømland Holding AS | Professional & scientific | 1993 |
| Stusselig AS | Manufacturing | 2020 |
| Sulten AS | Professional & scientific | 2020 |
| Sunde Bensin AS | Wholesale & retail | 2017 |
| Sunde Eiendom AS | Manufacturing | 1980 |
| Sunde Verven AS | Real estate | 2015 |
| Sundeodden AS | Real estate | 2019 |
| Sundesiden AS | Real estate | 2023 |
| Supersand Holding AS | Financial services | 2021 |
| Svad Invest AS | | 2017 |
| Svege Eiendom AS | Real estate | 1986 |
| Svege Industripark AS | Real estate | 2018 |
| Svegeskogen 11 AS | Real estate | 2019 |
| Svegeskogen 13 AS | Real estate | 2009 |
| Svegeskogen 7 AS | Real estate | 2019 |
| Sveige Utleie AS | Real estate | 2019 |
| Svein B Haugland AS | Real estate | 2001 |
| Sveisehuset Lister AS | Wholesale & retail | 2008 |
| Svela Holding AS | Real estate | 2002 |
| Svindland Holding AS | Wholesale & retail | 2006 |
| Synsrådgivning AS | Wholesale & retail | 2001 |
| Søk AS | Professional & scientific | 2022 |
| Sør Tech AS | Manufacturing | 2019 |
| Sør-Norsk Vann & Avløp AS | Professional & scientific | 2020 |
| Sørvest Eiendomsutvikling AS | Real estate | 2026 |
| Søssa Consult AS | Professional & scientific | 2025 |
| Søssa Holding AS | | 2025 |
| Søylandsbygget AS | Real estate | 2015 |
| Søylandslia 2 AS | Real estate | 2002 |
| Talje AS | Real estate | 2026 |
| Tanntekniker Martin Borten AS | Manufacturing | 2015 |
| Tasty Time Asia AS | Hospitality | 2025 |
| TBH Trafikkopplæring AS | Education | 2020 |
| Teamup AS | Professional & scientific | 2001 |
| Tecma Holding AS | Professional & scientific | 2020 |
| Teknisk Rådgivning Heinrich AS | Professional & scientific | 2024 |
| Teknisk Senter AS | Education | 2014 |
| Temper Tantrum AS | Health & social care | 2014 |
| Ten Solutions AS | Hospitality | 2010 |
| Terox AS | Construction | 2021 |
| TH Gabrielsen Transport AS | Transport & logistics | 1987 |
| Thidin AS | Real estate | 2025 |
| Thip Invest AS | | 2025 |
| Tito AS | Real estate | 2018 |
| To-Ka AS | Wholesale & retail | 2009 |
| Toli AS | Professional & scientific | 2019 |