| Allianse Vakt Og Sikkerhet Da | Administrative & support | 2004 |
| Alvegard Verkstad Og Galleri Da | Professional & scientific | 2012 |
| Antras Nord AS | Transport & logistics | 2021 |
| Brødrene Faane AS | Construction | 1991 |
| Bøen Elektro AS | Construction | 2018 |
| Faane Bygg Og Vedlikehold AS | Construction | 2026 |
| Hanfoss Kraftverk SA | Energy | 2006 |
| Hegna-Eiendom AS | Real estate | 2022 |
| Heia Eiendomsdrift AS | Real estate | 2003 |
| Hjartdal Elektro AS | Construction | 2010 |
| Hjartdal Og Gransherad Rekneskapskontor AS | Professional & scientific | 1994 |
| Hjartdal Service Og Næringsbygg AS | Construction | 2012 |
| Honningbua AS | Agriculture & fishing | 2019 |
| Irene Holding AS | Professional & scientific | 2015 |
| Karu AS | Transport & logistics | 2017 |
| Kovflottvegen Veglag SA | Administrative & support | 1964 |
| Kverndalsgt. 5 AS | Real estate | 2008 |
| L&F Eiendom AS | Real estate | 2009 |
| Lonar Skogsdrift AS | Agriculture & fishing | 2000 |
| Løvheim Interiørbutikk Og Gjestehuset AS | Wholesale & retail | 2013 |
| Mimose AS | Agriculture & fishing | 1987 |
| Mithra AS | Professional & scientific | 1991 |
| Moro Invest AS | Professional & scientific | 2025 |
| Mowinckel Fysioterapi AS | Health & social care | 2014 |
| MR Blikk Og Bygg AS | Construction | 2019 |
| Mur Og Tømmer Bygg AS | Real estate | 2007 |
| Myrbråten Consult AS | | 2017 |
| Norsk Varmlaft Utvikling AS | Professional & scientific | 1992 |
| Russmarken Va AS | Water & waste | 2007 |
| Sauland Bygdekraft SA | Energy | 2011 |
| Saulandtunet Eigedom AS | Real estate | 2002 |
| Saulandtunet Mat AS | Wholesale & retail | 2002 |
| Selfiy Eiendom AS | Real estate | 2020 |
| Selfiy Energi AS | Wholesale & retail | 2020 |
| Skårsetvegen SA | Real estate | 1981 |
| Slåtta Bil AS | Other services | 2024 |
| Slåtta Eiendom Og Handel AS | Real estate | 1988 |
| Slåtta Transport AS | Wholesale & retail | 2026 |
| Slåtta Transport Hjelpeselskap AS | Wholesale & retail | 2026 |
| Solsiden Panorama AS | Real estate | 2023 |
| Su-Solem AS | Real estate | 2021 |
| Skårnes Transport AS | Transport & logistics | 1985 |
| Telemark Hus Og Hytteutvikling AS | Real estate | 2021 |
| Tuddal Byggtjeneste AS | Construction | 1991 |
| Tuddalsdalen Hyttefelt AS | Real estate | 2016 |
| Vaa Bio Miljø AS | Manufacturing | 1990 |
| Wåle Holding AS | | 2026 |
| Ørvella Industrier AS | Real estate | 1985 |