| Skiltprodusent Gruppen AS | Manufacturing | 2018 |
| Skiltprodusenten AS | Manufacturing | 1988 |
| Skjee Regnskap AS | Financial services | 2005 |
| Skjee Samdrift Da | Agriculture & fishing | 2002 |
| Skjelbrei AS | Real estate | 2007 |
| Skoglia Eiendom AS | Real estate | 2015 |
| Skogveien 2B AS | Real estate | 1996 |
| Skogveien 4B AS | Real estate | 2023 |
| Skretting Landbruk & Graving AS | Construction | 2025 |
| SKT Eiendom AS | Transport & logistics | 2007 |
| SL Import Group AS | Real estate | 2026 |
| SL Saga AS | | 2019 |
| Slagen Industri & Montasje AS | Manufacturing | 2015 |
| SMJ Holding AS | Professional & scientific | 2023 |
| Snekkerkompaniet AS | Construction | 1988 |
| Snekkerkompaniet Eiendom AS | Real estate | 2013 |
| Snekkerkompaniet Invest AS | Real estate | 2013 |
| Soil Steam International AS | Professional & scientific | 2016 |
| Sole Skog AS | Agriculture & fishing | 2019 |
| Solgutta AS | Wholesale & retail | 2022 |
| Solid Base AS | | 2007 |
| Solkongane AS | Energy | 2024 |
| Solli Gård Da | Agriculture & fishing | 2003 |
| Solsem Holding AS | | 2025 |
| Solsem Invest AS | | 2025 |
| Solum Eiendom AS | Real estate | 2005 |
| Solution Sign AS | Manufacturing | 2008 |
| Sommerstad Holding AS | Real estate | 2012 |
| Spillorama Stokke AS | Arts & recreation | 2010 |
| Spilltech AS | Professional & scientific | 2016 |
| Sportylab AS | Wholesale & retail | 2022 |
| Spring Logistikk Lager & 3 PL AS | Transport & logistics | 2023 |
| Spring Logistikk Varetransport AS | Transport & logistics | 2022 |
| Spring Spark AS | Information & communication | 2025 |
| Spring Trykk & Brodering AS | Manufacturing | 2023 |
| SR Betongservice AS | Construction | 1996 |
| Stafberger Consulting AS | Health & social care | 1998 |
| Stall Joakim Hansen AS | Agriculture & fishing | 2019 |
| Stansefabrikken Products AS | Wholesale & retail | 1997 |
| Steinsvik Holding AS | | 2020 |
| Stensarmen 4 AS | Real estate | 2021 |
| Steven Foss Holding AS | Manufacturing | 2005 |
| Stian Røisgård Holding AS | | 2023 |
| Stiligheten AS | Professional & scientific | 2004 |
| Stokke Bil Og Motor AS | Other services | 2024 |
| Stokke Bilpleie AS | Other services | 2025 |
| Stokke Bilservice AS | Wholesale & retail | 1989 |
| Stokke Bygg AS | Construction | 2010 |
| Stokke Detalj AS | Wholesale & retail | 2004 |
| Stokke Dyreklinikk AS | Professional & scientific | 2010 |
| Stokke Eiendom AS | Real estate | 2004 |
| Stokke Eiendom Invest AS | Real estate | 2009 |
| Stokke Ferdigplen AS | Agriculture & fishing | 2016 |
| Stokke Fysioterapi Solberg Og Hansen AS | Health & social care | 2024 |
| Stokke Investment AS | Real estate | 1981 |
| Stokke Jordvanning SA | Agriculture & fishing | 1985 |
| Stokke Kebab King Da | Hospitality | 2010 |
| Stokke Landbruksteknikk AS | Wholesale & retail | 2015 |
| Stokke Legesenter Da | Health & social care | 2022 |
| Stokke Møbelverksted AS | Manufacturing | 1990 |
| Stokke Rehab AS | Real estate | 2022 |
| Stokke Revisjon AS | Professional & scientific | 2012 |
| Stokke Rørhandel AS | Construction | 1988 |
| Stokke Taksering AS | Real estate | 2003 |
| Stokke Utleie AS | Administrative & support | 2014 |
| Stokke Utmarkslag SA | Real estate | 2019 |
| Stokke Vaktmestertjenester AS | Administrative & support | 2025 |
| Stokkeveien 51 AS | Real estate | 2009 |
| Stoltenbergsgate 54 AS | Real estate | 2019 |
| Stone Freighters Norway Limited Nuf | Construction | 2024 |
| Stonea AS | Construction | 2022 |
| Storevahr Båthavn SA | Other services | 1995 |
| Storgaten 26 AS | Real estate | 2017 |
| Storm Adapt AS | Professional & scientific | 2022 |
| Storm Adapt Group AS | Professional & scientific | 2022 |
| Storm Vanguard AS | Professional & scientific | 2023 |
| Storåsen Eiendom AS | Real estate | 2001 |
| Strandman AS | Administrative & support | 1995 |
| Strandman Julegater Ans | Professional & scientific | 1979 |
| Styringssystemer AS | Professional & scientific | 2013 |
| Stållageret AS | Wholesale & retail | 2012 |
| Sundland Eiendomsutvikling AS | Real estate | 2018 |
| Sundland Næringsutvikling 1 AS | Real estate | 2025 |
| Sundland Næringsutvikling 2 AS | Real estate | 2025 |
| Sundland SK AS | Real estate | 2025 |
| Sundland Tomter AS | Real estate | 2005 |
| Sundland Torv Og Jord AS | Mining & quarrying | 1978 |
| Sundlandveien 4 AS | Real estate | 2023 |
| Surf-Sup AS | Wholesale & retail | 2014 |
| Sveisemekanikk AS | Manufacturing | 2000 |
| Sybr AS | Information & communication | 2017 |
| Sybr Holding AS | | 2022 |
| Systemlink Regnskap AS | Professional & scientific | 2017 |
| Sørby Eiendom AS | Real estate | 1999 |
| Sørhaug Bygg Og Interiør AS | Manufacturing | 2024 |
| Sørsdahl Transport AS | Transport & logistics | 2015 |
| T Hidle Holding AS | | 2022 |
| Tak- Og Fasadeprodukter AS | Construction | 2021 |
| Takbehandling AS | Administrative & support | 2020 |
| Takfornyer'N AS | Construction | 2018 |