| Rune Salvesen Holding AS | | 2020 |
| Rørlegger Odd Håkedal AS | Construction | 1997 |
| Rørleggermester Jarle Håkedal AS | Construction | 2024 |
| Sammentreff AS | Other services | 2024 |
| Sans Fysioterapi Og Trening Ans | Health & social care | 2000 |
| Scanflex AS | Manufacturing | 1987 |
| SG Maskin AS | Construction | 2025 |
| Sjuogførrseksti Holding AS | | 2023 |
| SJV1 AS | Real estate | 2012 |
| Skaftåsen 31 AS | | 2024 |
| Skaftåsen 87 AS | Construction | 2013 |
| Skin Atelier AS | Other services | 2024 |
| Skinnloftet Ans | Other services | 1989 |
| Skinpoint Hud- & Neglpleie AS | Other services | 2012 |
| Skog Og Anleggsdrift AS | Professional & scientific | 2013 |
| Skripeland Og Heia Eiendom AS | Real estate | 2002 |
| Smartlakk AS | Other services | 2025 |
| Smartlife AS | Wholesale & retail | 2022 |
| Smartskog AS | Wholesale & retail | 2016 |
| Smartvent AS | Construction | 2014 |
| Smuud Invest AS | Professional & scientific | 2020 |
| Småmuring AS | Construction | 2023 |
| Soldogg Consulting AS | Professional & scientific | 2025 |
| Soldogg Eiendom AS | Real estate | 2025 |
| Soldogg Holding AS | | 2025 |
| Solgaard Invest AS | | 2019 |
| Solutvikling AS | Professional & scientific | 2022 |
| SR Solutions AS | Professional & scientific | 2024 |
| Steffen Fidjeland AS | Construction | 2008 |
| Steffen Flaa Bygg AS | Construction | 2019 |
| Stekilveien Veilag SA | Real estate | 2017 |
| Stisi Design AS | Wholesale & retail | 2026 |
| Storebo Eiendom AS | Professional & scientific | 2005 |
| Storemyrtoppen AS | Administrative & support | 2023 |
| Strøget Eiendom AS | Real estate | 1994 |
| Sundtjønn Holding AS | | 2023 |
| Suvatne Transport AS | Transport & logistics | 2011 |
| Svaland Bygg Og Skog AS | Construction | 2025 |
| Synkron Media AS | Manufacturing | 2013 |
| Sælevik Invest AS | | 2020 |
| Sørlandets Bakhage SA | Professional & scientific | 2025 |
| Sørlands Drift AS | Administrative & support | 2025 |
| Sørlands Sag AS | Real estate | 2018 |
| T Hustveit AS | Professional & scientific | 2006 |
| T Mauseth Industriservice AS | Manufacturing | 1997 |
| Tannlege Helene Birkeland Lindtveit AS | Health & social care | 2019 |
| Tannlege Jara Trigueros AS | Health & social care | 2022 |
| Ted Entreprenør AS | Construction | 2013 |
| Ted Invest AS | Construction | 2005 |
| Ted Utleie AS | Administrative & support | 2018 |
| Teig Invest AS | Real estate | 2005 |
| Terreng Anlegg AS | Construction | 2019 |
| TG Engineering & Operations AS | Professional & scientific | 2022 |
| Tig Eiendom AS | Construction | 2016 |
| Tingeling Frisørsalong AS | Other services | 2012 |
| Tobiassen Fjellsprengning AS | Construction | 2011 |
| Toby Holding AS | Financial services | 1981 |
| Tollnes 1 AS | Real estate | 2005 |
| Tollnes Eiendom AS | Real estate | 2011 |
| Tollnesveien Eiendom AS | Real estate | 1991 |
| Tor Agnar Mollestad AS | Transport & logistics | 1986 |
| Trade and Service Group AS | Administrative & support | 1991 |
| Trekabiner AS | Manufacturing | 2020 |
| Tryen AS | Real estate | 2005 |
| TSL Group AS | | 2026 |
| Tuemyr Eiendom AS | | 2013 |
| Tveide Eiendom AS | Real estate | 2013 |
| Tveide Lager AS | Real estate | 2023 |
| Tveite Maskin AS | Construction | 2007 |
| Tx-Holding AS | Financial services | 2013 |
| Tømrer Finn Erling Birkeland AS | Construction | 2021 |
| Uldal AS | Manufacturing | 1988 |
| Vedalen Eiendom AS | Real estate | 2023 |
| Vegusdal Nærmat AS | Wholesale & retail | 2003 |
| Vesterflå Invest AS | Agriculture & fishing | 2014 |
| VF Invest AS | Agriculture & fishing | 2010 |
| Vifa Eiendom AS | Real estate | 2020 |
| Viola Invest AS | Professional & scientific | 2008 |
| Visjonært AS | Information & communication | 2020 |
| Vågsdalsfjorden Tomteselskap AS | Real estate | 2021 |
| Wecan AS | Professional & scientific | 2023 |
| Windsland Holding AS | Administrative & support | 2015 |
| WL Produkter AS | Professional & scientific | 2024 |
| WL Utvikling AS | Real estate | 2023 |
| WR Utvikling AS | Real estate | 2024 |
| Ytterdalen Skaubeitelag SA | Agriculture & fishing | 2019 |
| Øfo AS | Real estate | 2009 |
| Øh Investering AS | | 2024 |
| Ømollestad Holding AS | Real estate | 2025 |