| M. Øvrebø Holding AS | | 2023 |
| Magnus Knudsen Holding AS | Construction | 2021 |
| Maskinentreprenør Magnus Knudsen AS | Construction | 2022 |
| Mette Moe Fjellheim AS | Real estate | 2005 |
| Miljøgården Da | Professional & scientific | 2003 |
| Moelven Sør-Tre AS | Manufacturing | 1984 |
| Mola Eiendom AS | Real estate | 1977 |
| Moment AS | Real estate | 2014 |
| Moment Utleie AS | Real estate | 2017 |
| Mur, Skifer & Betong AS | Construction | 2020 |
| Måkeredet AS | Construction | 2004 |
| Mørland Maskin AS | Construction | 2014 |
| Navrane Holding AS | Manufacturing | 2021 |
| Norly Utvikling AS | Real estate | 2025 |
| Nye Øf Utvikling AS | Real estate | 2023 |
| Obm Bygg Og Takst AS | Real estate | 2024 |
| Origo-Holding AS | Information & communication | 2020 |
| Owl Advisory AS | Professional & scientific | 2022 |
| Pe Sveis AS | Manufacturing | 2019 |
| Pewag Norway AS | Wholesale & retail | 2020 |
| Premator Holding AS | Manufacturing | 2024 |
| Premator Surface Pro AS | Manufacturing | 2024 |
| Prima Fuel AS | Wholesale & retail | 2017 |
| Provacc AS | Agriculture & fishing | 2011 |
| Quatra Norge AS | Wholesale & retail | 2023 |
| Rosk Invest AS | | 2025 |
| Rp-Holding AS | Real estate | 2020 |
| Rønning Maskinservice AS | Manufacturing | 2021 |
| Sandtangen Eiendom AS | Real estate | 1988 |
| Sannidal Auto AS | Wholesale & retail | 1997 |
| Sannidal Bilskadesenter AS | Other services | 2005 |
| Sannidal Bilverksted AS | Other services | 1975 |
| Sannidal Dekk & Felg AS | Wholesale & retail | 2021 |
| Sannidal Hus Og Hytte AS | Construction | 2006 |
| Sannidal Invest AS | Real estate | 2023 |
| Sannidal Miljø Og Metall AS | Water & waste | 2023 |
| Sannidal Slangeservice AS | Manufacturing | 2012 |
| Sannidal Taxi & Minibuss AS | Transport & logistics | 2015 |
| Sannidal Utleiebygg AS | Real estate | 1984 |
| Sans Souci AS | Real estate | 2005 |
| Santi Consulting AS | Information & communication | 2022 |
| Skagerak Ørret AS | Administrative & support | 1982 |
| Skarvang Skogsdrift AS | Agriculture & fishing | 1998 |
| Skeidar Sannidal AS | Wholesale & retail | 1998 |
| Skilbrei Invest AS | | 2024 |
| Skinnhuset AS | Wholesale & retail | 2026 |
| Skjerveggen Holding AS | Real estate | 2016 |
| Skuland Maskin AS | Construction | 2018 |
| Smia AS | Real estate | 2010 |
| Smia Holding AS | Real estate | 2011 |
| Snøås Holding AS | Construction | 2021 |
| Sol Frisør AS | Other services | 2020 |
| Solvang Og Øygarden Eiendom AS | Real estate | 2015 |
| Solvang Transport AS | Construction | 2013 |
| Sot Eiendom AS | Real estate | 2018 |
| Sot Invest AS | Wholesale & retail | 2005 |
| Spire Salong AS | Other services | 2024 |
| Stasjonsdrift Blandkjenn AS | Wholesale & retail | 2023 |
| Stavelin Bakeriutsalg Kragerø AS | Hospitality | 2016 |
| Steintransport AS | Construction | 2021 |
| Steintransport Eiendom AS | Real estate | 2021 |
| Stensvold Maskin AS | Construction | 2023 |
| Strikkefeber Eiendom AS | Wholesale & retail | 2025 |
| Stubbebo AS | Construction | 2026 |
| Stuttlidalen 59 AS | Real estate | 2021 |
| Svensknuten Eiendom AS | Real estate | 2018 |
| Svenum SA | Real estate | 2000 |
| Sør-Norsk Boring AS | Construction | 2024 |
| Sørlandet Montasje AS | Wholesale & retail | 2011 |
| Sørsmolt AS | Agriculture & fishing | 2018 |
| T. Klausen Eiendom AS | Real estate | 2020 |
| Ta Transport AS | Transport & logistics | 2014 |
| Tbu Kragerø AS | Administrative & support | 2021 |
| Tele-Kjøkken AS | Manufacturing | 2007 |
| Telemark Maskin Og Utstyr AS | Wholesale & retail | 2024 |
| Tisjø-Teigen AS | Construction | 2022 |
| Tjrf Holding AS | Construction | 2019 |
| TLV Eiendom AS | Real estate | 2022 |
| TLV Varmepumper AS | Construction | 2015 |
| Toft Anleggsservice AS | Manufacturing | 2023 |
| Toft Industrier AS | Manufacturing | 2024 |
| Toft Technologies AS | Manufacturing | 2023 |
| Vannskjæring Sør-Øst AS | Manufacturing | 2012 |
| Varmslåtta Gård AS | Wholesale & retail | 2019 |
| Vestgård Holding AS | | 2022 |
| Vestmar Web AS | Information & communication | 2019 |
| Vibeto AS | Construction | 2026 |
| Vive AS | Professional & scientific | 1999 |
| Vive Eiendom AS | Professional & scientific | 2008 |
| Zaliro Invest AS | Information & communication | 2012 |
| Øf Tomt AS | Real estate | 2026 |
| Ørvik Eiendom AS | Construction | 2025 |
| Øyvind Fredriksen Holding AS | Real estate | 2020 |