| Stenhammars Tekniska Service Nuf | Professional & scientific | 2014 |
| Stjerna 2 AS | | 2025 |
| Stjerna AS | Transport & logistics | 2005 |
| Stockley Engineering Ltd | Professional & scientific | 2018 |
| Storm Offshore AS | Real estate | 2008 |
| STV 37 AS | Real estate | 2015 |
| Støle Therkelsen Eiendom AS | Financial services | 2005 |
| Sweet Castle AS | Hospitality | 2023 |
| Sævik Bygg AS | Construction | 2011 |
| Sævik Holding AS | Construction | 2021 |
| Sør-Vest Invest AS | Real estate | 2015 |
| Sør-Vest Megleren AS | Real estate | 2014 |
| Sørhytta AS | Real estate | 2019 |
| Sørlandsbadet AS | Hospitality | 2005 |
| Sørlandsbadet Manuell- Og Fysioterapi AS | Health & social care | 2013 |
| Sørlandshytta AS | Manufacturing | 1989 |
| Sørvakt AS | Wholesale & retail | 2024 |
| Sørvest Kontoreiendom AS | Real estate | 2022 |
| T E Hovden AS | Construction | 2024 |
| T-Shipping AS | | 2025 |
| T-Trade AS | Wholesale & retail | 2018 |
| Takst Sør AS | Real estate | 2025 |
| Tallknuser Holding AS | | 2025 |
| Tannlege Tobiassen AS | Health & social care | 2015 |
| Tarit Ans | Real estate | 2003 |
| Teet 1 AS | Real estate | 2011 |
| Tela Invest AS | Administrative & support | 1999 |
| Teppekroa AS | Wholesale & retail | 2001 |
| Tfa Bygg AS | Construction | 2019 |
| TH Bygg Og Vedlikehold AS | Construction | 2018 |
| Thalamus Eiendom AS | Real estate | 2005 |
| The Company AS | Professional & scientific | 2005 |
| Thefirm AS | Professional & scientific | 1998 |
| Thor Magne Hansen & Sønn AS | Construction | 2003 |
| Ticad AS | Professional & scientific | 2019 |
| Tidløs AS | Arts & recreation | 2017 |
| Tinv AS | Wholesale & retail | 2015 |
| Tira Da | Other services | 1995 |
| Tjomsland AS | Wholesale & retail | 2014 |
| TLF Eiendomsutvikling AS | Real estate | 2019 |
| TLS Mur AS | Construction | 2012 |
| TLS Mur Eiendom AS | Real estate | 2023 |
| Tomt Invest AS | Real estate | 2020 |
| Tonosoft AS | Real estate | 2005 |
| Topolino Holding AS | | 2023 |
| Tornado AS | Transport & logistics | 2015 |
| Traktor AS | Wholesale & retail | 2003 |
| Traktor Eiendom AS | Real estate | 1970 |
| Travveien 4 AS | Real estate | 2005 |
| Tre Og Betong BS Bygg AS | Construction | 2017 |
| Trefiberisolering Sør AS | Construction | 2016 |
| Trio Eiendom AS | Real estate | 1999 |
| Trio Hagekleiva AS | Real estate | 2013 |
| Trio Kvavik AS | Real estate | 2012 |
| Tripel Eiendom AS | Real estate | 2019 |
| Tripel Holding AS | Wholesale & retail | 2019 |
| Trippel Motor AS | Wholesale & retail | 2019 |
| Tristep AS | Professional & scientific | 2015 |
| Troll I Eske AS | Wholesale & retail | 2021 |
| Tuen Investering AS | Real estate | 2015 |
| Tunas Savings AS | | 2024 |
| TV & Satelitt Service AS | Other services | 2000 |
| TVN Holding AS | Construction | 2020 |
| Twin Thunder AS | Wholesale & retail | 1996 |
| Twin Thunder Eiendom AS | Wholesale & retail | 2003 |
| Twin Thunder Holding AS | Wholesale & retail | 2003 |
| Tømrer Arnt Pettersen AS | Construction | 2007 |
| Tømrer Olsen AS | Construction | 2011 |
| U9K Forvaltning AS | | 2025 |
| Utetrening Lyngdal Da | Education | 2025 |
| Utleie Experten AS | Administrative & support | 2015 |
| Valentino Mote AS | Wholesale & retail | 1996 |
| Valleheia Veiforening SA | Real estate | 2008 |
| Varme & Miljø AS | Construction | 2018 |
| Varmepumpe Lyngdal AS | Construction | 2013 |
| Vatland Bygg AS | Construction | 2017 |
| Verket Invest AS | Hospitality | 2005 |
| Verven Næringspark AS | Real estate | 2017 |
| Veterinær Daaland & Gotheim AS | Professional & scientific | 2026 |
| Vieland Skog SA | Construction | 2019 |
| Vik Stavenes Handel Ans | Hospitality | 2001 |
| Viking Feriesenter AS | Real estate | 1993 |
| Viking Holding AS | Real estate | 1990 |
| Vilgus Invest AS | | 2025 |
| Vilito AS | Financial services | 2015 |
| Vita Osteopati AS | Health & social care | 2021 |
| Vito Rådgivning AS | Professional & scientific | 2026 |
| Volla & Deppi Holding AS | | 2025 |
| Vti Norge AS | Construction | 2016 |
| Vå Holding AS | Real estate | 2015 |
| Vårveien Eiendom AS | Real estate | 2022 |
| Wah Taj Taste of India AS | Hospitality | 2023 |
| Walters Bakeri Og Konditori AS | Real estate | 1981 |
| Walters Efterfølger AS | Manufacturing | 2000 |
| Williamsen AS | Wholesale & retail | 1981 |
| Woodland AS | Real estate | 2026 |
| Xl-Bygg Sørvest AS | Wholesale & retail | 2003 |
| Yamaha Båt & Motorsenter AS | Manufacturing | 1999 |
| Ybm Holding AS | Real estate | 2015 |
| Yoga Opplevelsesferie AS | Administrative & support | 2019 |