| Sangefjellvegen Rødungen Ba | Real estate | 1969 |
| Schnell Invest AS | | 2026 |
| Schnell Tannhelse AS | Health & social care | 2026 |
| SHG Transport AS | Transport & logistics | 2001 |
| Shiraz Cafe & Room Ans | Hospitality | 2002 |
| Si Service AS | Other services | 2007 |
| Sigurd Tveito Holding AS | Real estate | 2005 |
| Sjemmedal AS | Construction | 2013 |
| Sjemmedal Eiendom AS | Real estate | 2009 |
| Sjemmedalhytta AS | Construction | 2003 |
| Sjemmedalhytta Prosjekt AS | Real estate | 2021 |
| Sjølie Bygg Og Maling AS | Construction | 2017 |
| Skarvheimen Fjellfisk Da | Manufacturing | 2002 |
| Skjervheim AS | Construction | 2005 |
| Skog Og Skred AS | Agriculture & fishing | 2020 |
| Skred AS | Professional & scientific | 2014 |
| Skrindo Invest AS | Real estate | 2016 |
| Skrindo-Tveito Maskin AS | Construction | 2022 |
| Skruvedalsvegen | Real estate | 1991 |
| Slettane AS | Professional & scientific | 2010 |
| Sletto Takst AS | Real estate | 2018 |
| Slåtto Holding AS | Real estate | 2005 |
| Snøgg AS | Administrative & support | 2022 |
| Snøgg Økonomi AS | Professional & scientific | 2022 |
| Solheim Karlsen AS | | 2025 |
| Solsmia AS | Wholesale & retail | 2021 |
| Sparebank 1 Fagernes Eiendom AS | Real estate | 2013 |
| Sparebank 1 Hallingdal Eigedom AS | Real estate | 2005 |
| Sparebank 1 Hallingdal Invest AS | Real estate | 1982 |
| Sparebank 1 Hallingdal Valdres | Financial services | 1869 |
| Sparebank 1 Valhall Eigedomsutvikling AS | Real estate | 2009 |
| Splicetech AS | Manufacturing | 2015 |
| SPV Kleivi AS | Real estate | 2026 |
| Stiger Til Tak AS | Wholesale & retail | 2018 |
| Stormvokter Holding AS | Construction | 2020 |
| Strendo Bygg & Betong AS | Construction | 2023 |
| Strendo Klinikken AS | Health & social care | 2024 |
| Strendo Trevare AS | Manufacturing | 2005 |
| Studio Gullhår AS | Other services | 2023 |
| Styling by Vima Da | Professional & scientific | 2024 |
| Sundbrei Transport AS | Transport & logistics | 2017 |
| Sundre Sko Og Reiseefekter Ans | Wholesale & retail | 1988 |
| Sundrevegen 81 AS | Real estate | 2009 |
| Sundrevegen Eiendom AS | Real estate | 1997 |
| Sundreøyne AS | Real estate | 2020 |
| Sundreøyne Utvikling AS | | 2021 |
| Sustainable Momentum AS | Other services | 2022 |
| Svall Kommunikasjon AS | Professional & scientific | 2018 |
| Svebe Holding AS | Real estate | 2005 |
| Symaskiner AS | Wholesale & retail | 2026 |
| Symaskiner AS | Wholesale & retail | 2015 |
| Sævre Transport Service AS | Transport & logistics | 2026 |
| Sørbøen AS | Professional & scientific | 2018 |
| Sørbøen Bygg Og Landbruk AS | Wholesale & retail | 2023 |
| Sørbøen Torsgard Holding AS | Wholesale & retail | 2023 |
| Sørbølfjell AS | Real estate | 2005 |
| Sørevass Transport AS | Transport & logistics | 2020 |
| T. Rust AS | Construction | 2014 |
| Tanken Arena AS | Hospitality | 2025 |
| Tanngarden Ål Da | Real estate | 2016 |
| Tannlege Guri Skjelde AS | Health & social care | 2016 |
| Tannlege Olav Holdhus AS | Health & social care | 2000 |
| Tes Byggservice AS | Construction | 2011 |
| Thoen Maskin AS | Construction | 2010 |
| Tid Kafe&Landhandel AS | Wholesale & retail | 2018 |
| Toh Invest AS | Other services | 2005 |
| Tom Pedersen AS | Transport & logistics | 2015 |
| Torget 3 Ål AS | Real estate | 2018 |
| Torkjell Kleivstøl AS | Construction | 1995 |
| Torpo Handel AS | Wholesale & retail | 2017 |
| Torsbu Stølslag SA | Real estate | 2020 |
| Tre Og Kunst AS | Construction | 2022 |
| Trobe AS | Manufacturing | 2021 |
| Trolløya Næringseiendom AS | Real estate | 1997 |
| TRS - Utvikling AS | Real estate | 2005 |
| Tune Gård AS | Health & social care | 2023 |
| Tunestveit AS | Health & social care | 2005 |
| Turlid Transport AS | Transport & logistics | 2023 |
| Tweego AS | Information & communication | 2020 |
| Tømrara'N Morgan Og Sjur Da | Construction | 2006 |
| Tømrer Leif Inge Dokken AS | Construction | 2013 |
| Underberg Holding AS | | 2025 |
| Unfaced Da | Wholesale & retail | 2021 |
| Valkyrien Orkester Da | Arts & recreation | 2016 |
| Varaldsetvegen Eigendom AS | Real estate | 2019 |
| Varmepumpebrødrene AS | Construction | 2025 |
| Vats Bygg AS | Construction | 2013 |
| Vats Fjellstue AS | Hospitality | 2014 |
| Vats Gardsmat AS | Hospitality | 2008 |
| Vats Hytteutleie AS | Real estate | 2026 |
| Vats Utmarkslag SA | Real estate | 2018 |
| Vegen Åsetno - Margitbakken - Kinn SA | Real estate | 1994 |
| Veidebu AS | Construction | 2009 |
| Veterinærvakta I Ål Og Hol AS | Professional & scientific | 2006 |
| Vetisa Eiendom AS | Real estate | 2009 |
| Vidvandre AS | Manufacturing | 2020 |
| Vidvandre Equipment AS | Wholesale & retail | 2025 |
| Vidvei AS | Administrative & support | 2022 |
| Viken Varme Og Sanitær AS | Construction | 2020 |
| Villmark AS | Manufacturing | 1993 |