| Aros Eiendom AS | | 2009 |
| Beinesdalen Utvikling AS | Real estate | 2001 |
| Bjørkåker Vei Og Va Ans | Real estate | 2023 |
| Brendaneset Eiendom AS | Real estate | 2022 |
| Brådet Va AS | Water & waste | 2022 |
| Bygg Og Service Sirdal AS | Administrative & support | 2018 |
| C Tjørhom AS | | 2025 |
| Deken AS | Real estate | 2025 |
| Draglineset Holding AS | | 2024 |
| Edel Sitt AS | | 2023 |
| Emb Eiendom AS | | 2018 |
| Fidjeland Skitrekk AS | Arts & recreation | 1989 |
| Finså Kulturkraft AS | Energy | 2025 |
| Fjellbutikken AS | Wholesale & retail | 2003 |
| Fjellspor AS | Professional & scientific | 2023 |
| Fjellstuå AS | Hospitality | 2026 |
| G P Tjørhom AS | Wholesale & retail | 2010 |
| Grimskarven AS | Real estate | 2023 |
| Hadlands Gard AS | Real estate | 2012 |
| Handleriet 1 AS | Real estate | 2022 |
| Handleriet 2 AS | Real estate | 2022 |
| Handleriet 3 AS | Real estate | 2022 |
| Haugen AS | Hospitality | 2006 |
| Hekta Sirdal AS | Manufacturing | 2021 |
| Hot Eiendom AS | Real estate | 2001 |
| Htsk Beitelag Ba | Agriculture & fishing | 1972 |
| Jets Eiendom AS | | 2018 |
| Kalveløa AS | Hospitality | 2013 |
| Kvæven Bygg AS | Construction | 2025 |
| Kvæven Stølen AS | Construction | 2018 |
| Loni Interiør AS | Wholesale & retail | 2021 |
| Lyvend AS | Professional & scientific | 2026 |
| Norwegian Offshore Technology Ans | Professional & scientific | 2025 |
| Nye Sirdal Invest AS | | 2025 |
| Peerlytics AS | Professional & scientific | 2019 |
| Perok AS | Professional & scientific | 2015 |
| R Tjørhom Invest AS | | 2025 |
| Relito AS | Professional & scientific | 2024 |
| RGH Holding AS | Construction | 2005 |
| Sageneset Feriesenter AS | Hospitality | 1991 |
| Sinnes Og Valevatn Veglag SA | Transport & logistics | 2016 |
| Sinneshyttå AS | Construction | 2005 |
| Sinneshyttå Bygg AS | Construction | 1997 |
| Sinneskulå AS | Real estate | 2023 |
| Sinneslia Vann- Og Avløpslag SA | Water & waste | 2007 |
| Sirdal Bygg AS | Construction | 2000 |
| Sirdal Eiendom AS | Real estate | 1988 |
| Sirdal Fjellgård AS | Hospitality | 2020 |
| Sirdal Forskaling&Betong AS | Construction | 2019 |
| Sirdal Golfsimulator Da | Administrative & support | 2026 |
| Sirdal Holding AS | Real estate | 2005 |
| Sirdal Holiday Homes AS | Hospitality | 2023 |
| Sirdal Hytteutvikling AS | Real estate | 2000 |
| Sirdal Høyfjellshotell AS | Hospitality | 1989 |
| Sirdal Invest AS | Real estate | 2008 |
| Sirdal Renhold AS | Administrative & support | 2024 |
| Sirdal Resort AS | Hospitality | 2016 |
| Sirdal Sport & Friluft AS | Wholesale & retail | 2020 |
| Sirdal Tradisjonsmat Torbjørg Haugen AS | | 2026 |
| Sirdal Utvikling AS | Real estate | 1998 |
| Sirdal Vann- Og Avløpsverk AS | Water & waste | 2003 |
| Sirdalsløyper SA | Arts & recreation | 2016 |
| Sirdalsslottet Driftsselskap AS | Hospitality | 2019 |
| Sirdalsslottet Eiendomsselskap AS | Real estate | 2019 |
| Sirdalstjenester AS | Construction | 2020 |
| Snøfokk AS | Hospitality | 2017 |
| Soleiknuten Eiendom AS | Real estate | 2015 |
| Soleiknuten Hyttegrend AS | Real estate | 2014 |
| Soleiknuten Skiljegard AS | Real estate | 2015 |
| Soleiknuten Vy AS | Real estate | 2025 |
| Solidhytta AS | Construction | 2016 |
| Solkro AS | Administrative & support | 2023 |
| SRS Media AS | Information & communication | 2017 |
| Stølen Kjøttforedling AS | Manufacturing | 2023 |
| Stølsjo Parkering AS | Transport & logistics | 2011 |
| Suleskard Kafe AS | Hospitality | 2024 |
| T. J. Tjørhom AS | Real estate | 2020 |
| T. Nesset Invest AS | Real estate | 2019 |
| TGT Næring AS | Real estate | 2020 |
| Tjørhom I AS | | 2025 |
| Tjørhom II AS | | 2025 |
| Tjørhom III AS | | 2025 |
| Tjørhomfjellet AS | Arts & recreation | 2004 |
| Tjørhomfjellet Eiendom AS | Real estate | 2005 |
| Tutor Eiendom AS | Professional & scientific | 2015 |
| Tømrermester Roy Hegre AS | Construction | 2003 |
| Up Wind AS | Administrative & support | 2009 |
| Uralur Eiendom AS | Real estate | 2023 |
| Uralur Holding AS | Real estate | 2023 |
| Vej Tjenester AS | Administrative & support | 2023 |
| Visit Sirdal AS | Administrative & support | 1990 |
| Ådneram Høyfjellsenter AS | Administrative & support | 2005 |
| Ådneram Maskin AS | Construction | 2004 |
| Ådneram Skitrekk AS | Arts & recreation | 2003 |
| Ådneram Skitrekk Da | Arts & recreation | 1994 |
| Ålsheia Skisenter AS | Arts & recreation | 2011 |
| Åmlid AS | Construction | 2009 |