| Søgne Blomst AS | Wholesale & retail | 2025 |
| Søgne Bygg AS | Construction | 2006 |
| SØGNE BYGGUTLEIE ANS Karlsen Repstad Ravnberg & Fiskaa | Real estate | 1987 |
| Søgne Bygningshåndverkere AS | Construction | 1980 |
| Søgne Data AS | Information & communication | 2022 |
| Søgne Dekksenter AS | Real estate | 2015 |
| Søgne Detalj AS | Wholesale & retail | 2016 |
| Søgne Eiendom AS | Real estate | 2001 |
| Søgne Eiendom Holding AS | Real estate | 2017 |
| Søgne Elektriske AS | Construction | 1999 |
| Søgne Fotterapi AS | Real estate | 2020 |
| Søgne Fritid Ans | Wholesale & retail | 1988 |
| Søgne Fysikalske Institutt AS | Health & social care | 2019 |
| Søgne Helsekost AS | Wholesale & retail | 2025 |
| Søgne Legesenter AS | Health & social care | 2020 |
| Søgne Legesenter Eiendom AS | Real estate | 2020 |
| Søgne Næring AS | Real estate | 2010 |
| Søgne Og Greipstad Sparebank | Financial services | 1862 |
| Søgne Parkering AS | Transport & logistics | 2010 |
| Søgne Pizza AS | Hospitality | 2005 |
| Søgne Rør AS | Construction | 2015 |
| Søgne Treningssenter AS | Arts & recreation | 2012 |
| Søgnejordbær Da | Agriculture & fishing | 2000 |
| Sør Agentur & Consulting AS | Professional & scientific | 2025 |
| Sør Installasjon AS | Construction | 2007 |
| Sør Multiservice AS | Construction | 2022 |
| Sør Restaurant Drift AS | Hospitality | 2018 |
| Sør Tre AS | Wholesale & retail | 1950 |
| Sør-Utleie AS | Real estate | 2018 |
| Sørflis AS | Construction | 2021 |
| Sørlandsapotekene AS | Wholesale & retail | 2010 |
| Sørlandskjøkken AS | Manufacturing | 2005 |
| Sørlandskjøkken Holding AS | Real estate | 2000 |
| Sørlandskjøkken Konsept AS | Information & communication | 2019 |
| Sørlandsmontasje AS | Construction | 2022 |
| Sørmaskinering AS | Construction | 2009 |
| Sørmaskinering Eiendom AS | Real estate | 2009 |
| Sørplen AS | Agriculture & fishing | 2025 |
| Sørstrand Eiendom AS | Real estate | 2005 |
| Sørtang AS | | 2019 |
| T Klungland Holding AS | Real estate | 2019 |
| T-Rib Holding AS | | 2021 |
| T.M.Hansen Holding AS | Real estate | 2013 |
| T.T. Eikestøl AS | Real estate | 2020 |
| Ta Go Eiendom AS | Real estate | 1992 |
| Ta Go Lefse Og Lompebageri AS | Manufacturing | 2001 |
| Takstmann Frank Severinsen AS | Real estate | 2025 |
| Tangen Torv AS | Real estate | 2021 |
| Tangen Torv Bolig AS | Real estate | 2000 |
| Tangen Torv Næring 2 AS | Real estate | 2023 |
| Tangen Torv Næring 3 AS | Real estate | 2023 |
| Tangvall Arena Bolig AS | Real estate | 2015 |
| Tangvall Arena Energi AS | Energy | 2023 |
| Tangvall Arena Holding AS | Real estate | 2021 |
| Tangvall Arena Næring AS | Real estate | 2021 |
| Tangvall Arena Parkering AS | Real estate | 2021 |
| Tangvall Arena Senter AS | Real estate | 2021 |
| Tangvall AS | Construction | 2008 |
| Tangvall Catering AS | Hospitality | 2026 |
| Tangvall Eiendom AS | Real estate | 1998 |
| Tangvall Elektro AS | Wholesale & retail | 2016 |
| Tangvall Kiosk Og Spiseri AS | Wholesale & retail | 2023 |
| Tangvall Sportsbar AS | Hospitality | 2021 |
| Tangvall Torg AS | Real estate | 1977 |
| Tannlege Straaen AS | Health & social care | 2014 |
| Tannlege Tone Heimdal Nodenes AS | Health & social care | 2018 |
| Team Tjomsland AS | Arts & recreation | 2023 |
| Teigen Eiendom AS | Real estate | 1996 |
| Tekra AS | Financial services | 2007 |
| Tele Sør Mobil AS | Information & communication | 2025 |
| Tempofisk AS | Agriculture & fishing | 2007 |
| Tenila AS | Real estate | 2001 |
| Terje Mydland Holding AS | | 2005 |
| Ternen Fiskeri AS | Agriculture & fishing | 2025 |
| Thealex AS | Construction | 2019 |
| Thomassen Og Try Hus AS | Real estate | 2002 |
| Thoner Invest AS | | 2023 |
| Thov Holding AS | Professional & scientific | 2005 |
| Thraneredet AS | Professional & scientific | 2019 |
| Three Little Birds AS | | 2025 |
| Tiberi AS | Wholesale & retail | 1992 |
| Tinghuset Eiendom AS | Real estate | 2009 |
| Tinka Holding AS | | 2019 |
| Tinnheiveien 8 AS | Real estate | 2025 |
| Tintin Holding AS | | 2023 |
| TM Elektriske AS | Construction | 2026 |
| TMH Eiendom AS | Real estate | 2009 |
| TMH Kran & Transport AS | Transport & logistics | 2020 |
| TMS Kapital AS | | 2025 |
| TN Takst AS | Real estate | 2025 |
| Tofteland Lier AS | Real estate | 2008 |
| Tom Arne Aamodt AS | Real estate | 2005 |
| Tom Tånevik AS | Construction | 2026 |
| Tomt Eiendom AS | Real estate | 2019 |
| Toncon AS | Information & communication | 2016 |
| Top 116 AS | Construction | 2022 |
| Tore Ljøkjel AS | Arts & recreation | 2008 |
| Torkildsen Graving Og Sjøtransport AS | Construction | 2003 |
| Torsheim Eiendom Søgne AS | Real estate | 2011 |
| Torsøe Holding&Invest AS | | 2025 |