| Nome Skog Og Miljø AS | Energy | 2009 |
| Nome Vekst AS | Real estate | 1975 |
| Nordskog Holding AS | Wholesale & retail | 2002 |
| Novafunk Da | Arts & recreation | 2013 |
| Nuke Invest AS | | 2026 |
| Omnes Hus Og Hyttebygg AS | Construction | 1998 |
| Omnes Invest AS | Construction | 2005 |
| Ostrøm Kurs Og Utvikling AS | Education | 2015 |
| Profectus AS | Real estate | 2008 |
| Prosjekt Assistanse & Forretningsstøtte AS | Information & communication | 1997 |
| RTB AS | Construction | 2024 |
| Rui Fitness AS | Arts & recreation | 2024 |
| Ruta Kjeldal AS | Health & social care | 2020 |
| Rørlegger K.H. Semb AS | Construction | 2017 |
| S Risdalen AS | Professional & scientific | 2024 |
| Sagaåsen AS | Real estate | 2024 |
| Seljord Renhold AS | Administrative & support | 2018 |
| Sideriet AS | Manufacturing | 2020 |
| Skogens Rom AS | Hospitality | 2024 |
| Slusekroa AS | Hospitality | 2024 |
| Solas Elektro AS | Construction | 2025 |
| Spilleren AS | Wholesale & retail | 2023 |
| Sportskjøring AS | Wholesale & retail | 2024 |
| Stormo Invest AS | Real estate | 2006 |
| STR1FE AS | | 2021 |
| Straumen Elektro AS | Construction | 2025 |
| Strengen Event AS | Administrative & support | 2012 |
| Strengenvegen 31 AS | Real estate | 2020 |
| Strengenvegen Eiendom AS | Real estate | 2015 |
| Strengenveien 33 AS | Real estate | 2024 |
| Sulzer Metco (Norden) AB | Wholesale & retail | 2001 |
| Superultraplus Designstudio AS | Professional & scientific | 2020 |
| Susås Gård Da | Agriculture & fishing | 2010 |
| Telemark Kanalcamping AS | Real estate | 2006 |
| Telemark Kompetanse AS | Professional & scientific | 2020 |
| Telemark-Klima AS | Construction | 2020 |
| Thkittilsen AS | Education | 2024 |
| Thosa Invest AS | Professional & scientific | 2016 |
| Tobro Eiendom AS | Real estate | 1998 |
| Torsberg Eiendom AS | Real estate | 2014 |
| Tveit Traktor Og Maskindrift AS | Agriculture & fishing | 2025 |
| Tveitan AS | Real estate | 2024 |
| Tveitan Gård AS | Agriculture & fishing | 2005 |
| Tveito Maskin AS | Construction | 2013 |
| Ulefoss Bryggepark Drift AS | Real estate | 2018 |
| Uvil Utvikling AS | Real estate | 2021 |
| Valo Bil AS | Administrative & support | 2018 |
| Valo Motorsenter AS | Wholesale & retail | 2022 |
| Vanor Bolig AS | Construction | 2017 |
| Vanor Holding AS | Construction | 2018 |
| Verpe Grustak AS | Mining & quarrying | 2018 |
| Verpe Gård Ans | Agriculture & fishing | 2016 |
| Verver Norge AS | Wholesale & retail | 2019 |
| Vestvendt Utbygging AS | Real estate | 2022 |
| Victoria & Henrik AS | Wholesale & retail | 2013 |
| Victoria Café & Dine AS | Hospitality | 2016 |
| WG Eiendomsdrift AS | Real estate | 2020 |
| Wienerberger AS | Wholesale & retail | 2000 |
| Wik Tømmer & Transport AS | Transport & logistics | 1997 |
| Zaklad Stolarski Eugeniusz Sosnowski | Construction | 2007 |
| Årviki Eiendom AS | Real estate | 2006 |
| Øykhaug AS | Professional & scientific | 2014 |