| Svart Svane AS | Education | 2019 |
| Svartnakken AS | Energy | 2024 |
| Svay Maritime AS | Administrative & support | 2025 |
| Sveise Og Elektroservice AS | Manufacturing | 1988 |
| Sveisehuset Kristiansand AS | Wholesale & retail | 1992 |
| Svend Tvedt AS | Wholesale & retail | 2000 |
| Svendsen Bygg AS | Construction | 2024 |
| Svendsen Events AS | Administrative & support | 2026 |
| Sverdrupson Offshore-Service AS | Transport & logistics | 2016 |
| Sverre Nordmo AS | Real estate | 2014 |
| SVG Invest AS | Manufacturing | 2019 |
| Svør AS | | 2020 |
| Swaber AS | Administrative & support | 2024 |
| Swatland AS | Information & communication | 2021 |
| Swingen Holding AS | Real estate | 2015 |
| Swipload Technologies AS | Information & communication | 2019 |
| Sydinga 45 AS | Real estate | 2023 |
| Sydinga 54 Eiendom AS | Real estate | 2025 |
| Sydinga 63 AS | Real estate | 2021 |
| Sydinga 66 AS | Real estate | 2024 |
| Sydinga Eiendom AS | Real estate | 2022 |
| Sydinga Holding AS | Real estate | 2024 |
| Sydlandske AS | Real estate | 2020 |
| Sydvest Arkitektur AS | Professional & scientific | 2015 |
| Sydvesteiendom AS | Real estate | 2012 |
| Sydøya AS | Professional & scientific | 2010 |
| Sykkelbutikken I Vågsbygd AS | Other services | 2019 |
| Sykkelguttane AS | Wholesale & retail | 2017 |
| Sykkelpikene AS | Wholesale & retail | 2014 |
| Syla AS | | 2024 |
| Sylinderservicetomta 2 AS | Real estate | 2018 |
| Syma Invest AS | Real estate | 1999 |
| Syrtveit Investering AS | | 2022 |
| Syspro AS | Information & communication | 2016 |
| Systemco AS | Construction | 2009 |
| Syv AS | Real estate | 2022 |
| Syvert Holding AS | Real estate | 2018 |
| Syvertsen & Bråthen-Nordland AS | Professional & scientific | 2024 |
| Syvertsen AS | Health & social care | 1999 |
| Szafranek Piotr Safranski Regon 100338977 Nuf | Agriculture & fishing | 2008 |
| Sæbø Eiendom AS | Real estate | 2026 |
| Sædberg Metall AS | Water & waste | 1998 |
| Sæthre Holding AS | Real estate | 2005 |
| Sævig Elektro AS | Construction | 2023 |
| Söderberg & Partners Sør AS | Financial services | 2016 |
| Söta Bror AS | Professional & scientific | 2009 |
| Sødal Invest AS | Real estate | 1972 |
| Søgne Brukt Og Antikk AS | Wholesale & retail | 2016 |
| Søgne Dyr Eiendom AS | Real estate | 2014 |
| Søgne Industriselskap AS | Real estate | 1980 |
| Sølvbukta Eiendom AS | Real estate | 2016 |
| Sølvbukta Invest AS | Real estate | 2016 |
| Søm Legesenter Da | Health & social care | 2003 |
| Søm Legesenter Eiendom Da | Real estate | 2001 |
| Sømrommet AS | Manufacturing | 2017 |
| Sømu Da | Health & social care | 2013 |
| Sønday AS | Wholesale & retail | 2026 |
| Søndergaard Eiendom AS | Real estate | 2011 |
| Søndergaards Sveiseverksted AS | Manufacturing | 1985 |
| Sønnavind AS | Real estate | 2023 |
| Sønnik Klær for Menn AS | Wholesale & retail | 2008 |
| Sør Apotek AS | Wholesale & retail | 2021 |
| Sør Arena Drift AS | Real estate | 2020 |
| Sør Arena Legesenter Da | Health & social care | 2018 |
| Sør Blikk & Ventilasjon AS | Construction | 2017 |
| Sør Cup AS | Arts & recreation | 2007 |
| Sør Dental AS | Manufacturing | 1994 |
| Sør Eiendomsutvikling AS | Real estate | 2007 |
| Sør Elektrisk AS | Construction | 2023 |
| Sør Interiør AS | Wholesale & retail | 2024 |
| Sør Invest Holding AS | Information & communication | 2006 |
| Sør Nett & Design Da | Information & communication | 1996 |
| Sør Restaurering AS | Construction | 2013 |
| Sør Sportsreiser AS | Administrative & support | 2021 |
| Sør Vest Eiendomsutvikling AS | Real estate | 2008 |
| Sør Vet AS | Professional & scientific | 2022 |
| Sør Wrap AS | Professional & scientific | 2018 |
| Sør-Stål Eiendom AS | Real estate | 2017 |
| Sørbris AS | Administrative & support | 2014 |
| Sørdal Invest AS | | 2020 |
| Søreiendom AS | Real estate | 2013 |
| Sørensens Holdingselskap AS | Real estate | 1963 |
| Sørensens Visergutkontor Ans | Transport & logistics | 1995 |
| Sørfiks AS | Other services | 2018 |
| Sørheim Bygg AS | Construction | 2022 |
| Sørkapital AS | Professional & scientific | 2005 |
| Sørlandet Drift AS | Arts & recreation | 2020 |
| Sørlandet Gokart AS | Administrative & support | 2020 |
| Sørlandet Hestesport AS | Arts & recreation | 2022 |
| Sørlandet Klatresenter AS | Arts & recreation | 2019 |
| Sørlandet Privatsykehus AS | Health & social care | 2017 |
| Sørlandet Sykehus Parkering AS | Transport & logistics | 2002 |
| Sørlandet Ur Og Smykker AS | Wholesale & retail | 2002 |
| Sørlandets Bil & Import AS | Wholesale & retail | 2009 |
| Sørlandets Bilverksted AS | Other services | 1998 |
| Sørlandets Elektro Engros AS | Wholesale & retail | 2012 |
| Sørlandets Forsikringssenter AS | Financial services | 2015 |
| Sørlandets Fysikalske Institutt Kristiansand AS | Health & social care | 1980 |
| Sørlandets Hudpleieskole Ans | Education | 1996 |
| Sørlandets Hudpleieskole AS | Education | 2021 |