| Svertingstad Næringspark AS | Real estate | 2018 |
| Svistein Eiendom 2 AS | Real estate | 2008 |
| Svæli AS | Real estate | 2024 |
| Syden Holding AS | | 2019 |
| Sydvesten AS | Real estate | 1998 |
| Systech Design AS | Professional & scientific | 1998 |
| Sæland 19 Da | Real estate | 2006 |
| Særpreg AS | Professional & scientific | 2020 |
| Sørbø Kleppe AS | Real estate | 2001 |
| Sørumsand Panorama 2 AS | | 2024 |
| Sørvest Kran & Rep AS | Manufacturing | 2018 |
| Søsknene Vaaland Ans | Real estate | 1991 |
| T Birkeland Holding AS | | 2023 |
| T. Haugland Da | Agriculture & fishing | 2023 |
| T.Aa.Rådgivning AS | Professional & scientific | 2017 |
| T.Aasen Holding AS | Professional & scientific | 2020 |
| T.Stueland Lås AS | Wholesale & retail | 2004 |
| T.Tveiten Holding AS | | 2026 |
| Taa Holding AS | Financial services | 2005 |
| Tahiti Eiendom AS | Real estate | 2025 |
| Talgø-Invest AS | Arts & recreation | 2019 |
| Tamai AS | Financial services | 2005 |
| Tangarholen AS | Real estate | 2010 |
| Tannlege Helseth AS | Health & social care | 2004 |
| Tannlege Katrin Årsland AS | Health & social care | 2015 |
| Tannlege Kristina Heskje AS | Health & social care | 2011 |
| Team Bygg AS | Real estate | 2002 |
| Team Bygg Drift AS | Construction | 2023 |
| Tegle AS | Manufacturing | 1998 |
| Tegle Eiendom AS | Manufacturing | 2005 |
| Tegle Holding AS | Manufacturing | 2022 |
| Tehi AS | Wholesale & retail | 2013 |
| Tehi Eiendom AS | Real estate | 2024 |
| Tehi Holding AS | Real estate | 2021 |
| Tej Capital AS | Information & communication | 2023 |
| Teodor Dahlsvei II AS | Real estate | 2018 |
| Terje Obrestad AS | | 2024 |
| Terje Stangeland Holding AS | Financial services | 2012 |
| Tero Investering AS | Real estate | 2010 |
| TF Planering AS | Construction | 2024 |
| TG Pumpeservice AS | Wholesale & retail | 2015 |
| The Firm Holding AS | | 2023 |
| The Next Level AS | Information & communication | 2024 |
| The Phoenix Foundation AS | Real estate | 2013 |
| Thime Station AS | Hospitality | 2017 |
| Thore Ellingsensveg 16 AS | Real estate | 2026 |
| Tidosem Holding AS | | 2015 |
| Tilhengergarasjen AS | Wholesale & retail | 2021 |
| Time Bygg AS | Administrative & support | 2021 |
| Time Elektro AS | Construction | 1991 |
| Time Hinnaland Eiendom Da | Real estate | 2006 |
| Time Samdrift Da | Agriculture & fishing | 2003 |
| Timech AS | Manufacturing | 2013 |
| Tinghaug AS | Financial services | 2005 |
| Tippel AS | | 2025 |
| Tjelta Auto AS | Wholesale & retail | 2008 |
| Tjelta Eiendom AS | Real estate | 2003 |
| Tjemsland Transport AS | Transport & logistics | 2012 |
| Tji Holding AS | | 2025 |
| Tjo Holding AS | | 2025 |
| Tjøstolvsen AS | Wholesale & retail | 1982 |
| Tjøtta Holding AS | Real estate | 2020 |
| Tjøtta Terrasse AS | Real estate | 2019 |
| Tjøtta Utbyggingsselskap AS | Real estate | 2011 |
| Tjøttaparken Fus Barnehage AS | Education | 2019 |
| Tkfs AS | Real estate | 2011 |
| TKM AS | Health & social care | 2021 |
| TKS Kran Elektro AS | Manufacturing | 2004 |
| TNB Bryne AS | Wholesale & retail | 2021 |
| TOB58 AS | Health & social care | 2021 |
| Tof Holding AS | Wholesale & retail | 2019 |
| Tollaksen Invest AS | Information & communication | 2017 |
| Tomine AS | Wholesale & retail | 1994 |
| Tommy Kvia AS | Real estate | 2005 |
| Tomtespesialisten AS | Real estate | 2010 |
| Tongkor AS | Wholesale & retail | 2024 |
| Top Level Contractors AS | Construction | 2020 |
| Topp Til Tå Velvære AS | Other services | 2006 |
| Toppskudd Holding AS | | 2026 |
| Tor Jan Granberg AS | Wholesale & retail | 2004 |
| Torget Eiendom AS | Real estate | 1975 |
| Torggata AS | Real estate | 2000 |
| Torjå AS | Real estate | 2008 |
| Torkel R Holding AS | | 2019 |
| Torstein Håland AS | Professional & scientific | 2016 |
| Torvstakk AS | Information & communication | 2025 |
| Total Betong AS | Construction | 2011 |
| Total Betong Eiendom AS | Real estate | 2016 |
| Total Betong Holding AS | Real estate | 2014 |
| Total Prosjektering AS | Professional & scientific | 2023 |
| Totalbetong Gruppen AS | Construction | 2018 |
| Totar AS | Real estate | 2015 |
| Toto Invest AS | | 2020 |
| Toves Frisør AS | Other services | 2021 |
| Trallnor Eiendom AS | Real estate | 2005 |
| Transversus AS | Real estate | 2010 |
| Transversus Holding AS | | 2026 |
| Trappeteknikk AS | Manufacturing | 2004 |
| Travelevent AS | Administrative & support | 2006 |
| Treat Invest AS | | 2021 |