| Solveig AS | Health & social care | 2007 |
| Solveigs Utleie AS | Administrative & support | 2023 |
| Som Hos Moi AS | Hospitality | 2020 |
| Sombra Holding AS | | 2026 |
| Sommer Og Sol AS | Real estate | 2024 |
| Sommerbris AS | Arts & recreation | 2019 |
| Sommerløpet AS | Arts & recreation | 2025 |
| Sommerro Holding AS | Financial services | 2011 |
| Sommerro Utvikling AS | Real estate | 2019 |
| Sommerset Engineering AS | Professional & scientific | 2022 |
| Son Innvest AS | | 2019 |
| Son Næringseiendom AS | Real estate | 2010 |
| Song Eiendom AS | Real estate | 1989 |
| Songcamping AS | Information & communication | 2024 |
| Sorelle Di Dressage AS | Professional & scientific | 2022 |
| Sorteberg Kirkeng Holding AS | Financial services | 2018 |
| South Coast Creative AS | Professional & scientific | 2019 |
| South Coast Invest AS | Health & social care | 2015 |
| South State Shipping Ltd | | 1998 |
| South West Mobility AS | Administrative & support | 2024 |
| Southwind AS | Professional & scientific | 2022 |
| Sovik AS | | 2025 |
| Sowdiak Er Best AS | Arts & recreation | 2018 |
| SP Bil AS | Wholesale & retail | 2023 |
| Spa Club Ans | Other services | 2007 |
| Spa Parts Norge AS | Wholesale & retail | 2013 |
| Spacerider Studio AS | Administrative & support | 2006 |
| Spangereid Eiendom AS | Real estate | 2020 |
| Spania Hotels Invest AS | Real estate | 2012 |
| Spareskillingsbanken | Financial services | 1876 |
| Spareskillingsbanken Eiendomsselskap AS | Real estate | 2024 |
| Spareskillingsmegleren AS | Real estate | 2024 |
| Spartak Eiendom AS | Real estate | 2008 |
| Sparx AS | | 2020 |
| Specifiability AS | Information & communication | 2026 |
| Specter Trading AS | Wholesale & retail | 2020 |
| Speechdesigner AS | Education | 2015 |
| Spektra Kunst AS | Arts & recreation | 2024 |
| Spencer Distribusjon AS | Transport & logistics | 1986 |
| Spenn Technology AS | Information & communication | 2015 |
| Speo Products AS | Professional & scientific | 2015 |
| Spesial Renholdsservice AS | Administrative & support | 2012 |
| Spesialgrossisten Sør AS | Wholesale & retail | 2011 |
| Spesialistklinikk AS | Health & social care | 2014 |
| Spesialistsenteret AS | Health & social care | 2005 |
| Spesialprosjekt AS | | 2023 |
| Spiff Innovation AS | Information & communication | 2005 |
| Spileveggen AS | Construction | 2024 |
| Spillerinvest AS | Professional & scientific | 1997 |
| Spillet Norge Underholdningsarkitekten Ans | Education | 2002 |
| Spind Farsund AS | Real estate | 2021 |
| Spinn Dansestudio Da | Arts & recreation | 2011 |
| Spira AS | Professional & scientific | 2022 |
| Spiregården AS | Arts & recreation | 2017 |
| Spiren Kafe AS | Hospitality | 2023 |
| Spiren Shop AS | Wholesale & retail | 2023 |
| Spiseriet Catering AS | Hospitality | 2018 |
| Spitzbergen Nordic AS | Real estate | 2003 |
| Spjotnesveien AS | Real estate | 2022 |
| Sport 1 Kristiansand AS | Wholesale & retail | 2023 |
| Sport-Senteret Kristiansand AS | Arts & recreation | 2007 |
| Sportsmag AS | Education | 2014 |
| Sportsprofil Norge AS | Wholesale & retail | 2000 |
| Sprinkler Norge AS | Construction | 2013 |
| SPT Kristiansand AS | Arts & recreation | 2014 |
| Sptu Tomt 1 AS | Real estate | 2022 |
| Sptu Tomt 10 AS | Real estate | 2022 |
| Sptu Tomt 14 AS | Real estate | 2023 |
| Sptu Tomt 15.1 AS | Real estate | 2023 |
| Sptu Tomt 15.2 AS | Real estate | 2022 |
| Sptu Tomt 16.2 AS | Real estate | 2024 |
| Sptu Tomt 19 AS | Real estate | 2022 |
| Sptu Tomt 20 AS | Real estate | 2021 |
| Sptu Tomt 21 AS | Real estate | 2022 |
| Sptu Tomt 4.2 AS | Real estate | 2021 |
| Spurven AS | Administrative & support | 2024 |
| Spyd Hodling AS | Information & communication | 2024 |
| Spyd Holding AS | | 2021 |
| Spøas F8 AS | Real estate | 2010 |
| Spøas F9 AS | Real estate | 2010 |
| Spøt AS | Professional & scientific | 2024 |
| Square Holding AS | Financial services | 2010 |
| SR Holding AS | Real estate | 2005 |
| SR INVEST1 AS | Professional & scientific | 2022 |
| SR INVEST2 AS | | 2026 |
| Srdahl Invest AS | | 2025 |
| SRR Bygg AS | Real estate | 2005 |
| SSM Invest AS | Manufacturing | 2017 |
| Sso Invest AS | Professional & scientific | 2007 |
| ST Olav Utvikling AS | Real estate | 2008 |
| St-Montering AS | Construction | 2020 |
| ST. Josephs AS | Real estate | 2015 |
| Sta Utvikling AS | Real estate | 2013 |
| Staaldalen AS | | 2021 |
| Stab AS | Professional & scientific | 2024 |
| Stadion Utleie AS | Real estate | 2010 |
| Stadionsvingen AS | Real estate | 2006 |
| Stadionveien 4 AS | Real estate | 1999 |
| Stadium Outlet Norge AS | Wholesale & retail | 1994 |
| Stadland Eiendom AS | Real estate | 2026 |