| RS Klimateknikk AS | Professional & scientific | 2018 |
| Rust Eiendomsselskap AS | Wholesale & retail | 1998 |
| Rygg AS | Real estate | 2005 |
| S Auto AS | Wholesale & retail | 2024 |
| SB Anleggsteknikk AS | Construction | 2025 |
| SB Anleggsteknikk Holding AS | | 2025 |
| Scandic Work Norway AS | Construction | 2014 |
| Sentrum Bil Og Eiendom AS | Wholesale & retail | 1998 |
| Sentrumsgården Gol AS | Real estate | 2011 |
| Sentrumsvegen 10/12 AS | Real estate | 2024 |
| Sentrumsvegen 18 AS | Real estate | 2000 |
| Sentrumsvegen 24 AS | Real estate | 2011 |
| Sentrumsvegen 59 AS | Real estate | 2026 |
| Sentrumsvegen 61 Gol AS | Real estate | 2023 |
| Sentrumsvegen 73-75 AS | Real estate | 2022 |
| Shae Invest AS | | 2021 |
| Sis Utleie AS | Real estate | 1999 |
| Sjauset Drift SA | Water & waste | 2015 |
| Sjauset Småviltjakt SA | Real estate | 2026 |
| Skaga Gård AS | Financial services | 2005 |
| Skagahøgdi Felleskost AS | Real estate | 2020 |
| Skagen Holding AS | Professional & scientific | 2014 |
| Skaruha.No Reklame AS | Professional & scientific | 2015 |
| Skeidar Gol AS | Wholesale & retail | 2008 |
| Ski Ohoi Holding AS | | 2025 |
| Skogen Eiendom AS | Other services | 2002 |
| Skredegård Eiendom AS | Real estate | 2006 |
| Skredegård Foto AS | Professional & scientific | 1987 |
| Skysskroa AS | Hospitality | 2002 |
| Slaatto Sag Og Høvleri AS | Manufacturing | 1990 |
| Slettemoen AS | Construction | 2017 |
| Slettemoen Holding AS | Construction | 2005 |
| Slettemoen Utvikling AS | Real estate | 2020 |
| Sletto Bygg AS | Construction | 1995 |
| Sletto Holding AS | Real estate | 2022 |
| Sletto Invest AS | Real estate | 2019 |
| Sletto Trafikkskole AS | Education | 2016 |
| Slsr AS | Administrative & support | 2026 |
| Slåtten Skog AS | Agriculture & fishing | 2019 |
| Snodalen Vannverk SA | Water & waste | 2023 |
| Solli Mur AS | Construction | 2015 |
| Solsia AS | Real estate | 2025 |
| Solstad Gjestegård AS | Hospitality | 2022 |
| Sonar Invest AS | Real estate | 2000 |
| Sos Brannconsult AS | Professional & scientific | 1998 |
| Sportco Gol AS | Wholesale & retail | 2021 |
| Stall Tuppeskogen AS | Agriculture & fishing | 2018 |
| Stasjonsveien Eiendomsutvikling AS | Real estate | 2012 |
| Stav Og Laft AS | Construction | 2023 |
| Stav Og Lafthytta Da | Real estate | 2015 |
| Steinbråten Eiendom AS | Real estate | 2015 |
| Steinbråten Holding AS | Education | 2015 |
| Sthea Holding AS | | 2024 |
| Stim Work AS | Real estate | 2023 |
| Stola Holding AS | Real estate | 2021 |
| Stolen Holding AS | | 2023 |
| Storefjell Booking AS | Financial services | 2005 |
| Storefjell Hyttebooking AS | Financial services | 2005 |
| Storefjell Høyfjellshotell AS | Hospitality | 1975 |
| Storefjell Kurs Og Konferanse Booking AS | Financial services | 2005 |
| Storefjell Skiarena AS | Arts & recreation | 2005 |
| Storefjell Utvikling AS | Financial services | 2017 |
| Strai Kjøkken Hallingdal AS | Wholesale & retail | 2014 |
| Strandheim Holding AS | | 2023 |
| Strikkeglede AS | Wholesale & retail | 2022 |
| Strøm Service AS | Construction | 2008 |
| Stubsve AS | Wholesale & retail | 2022 |
| Stølen Eiendom AS | Real estate | 1977 |
| Susi AS | Wholesale & retail | 2025 |
| Sutek AS | Information & communication | 2007 |
| Svello Eiendom AS | Real estate | 2001 |
| Svello Holding AS | Real estate | 2019 |
| Syningen Invest AS | Construction | 2015 |
| Syningen Utvikling AS | Real estate | 2018 |
| Syninghalle Vatn & Avløp Da | Water & waste | 2007 |
| Syno Hytteservice AS | Administrative & support | 2007 |
| Søm & Idestua Da | Manufacturing | 1995 |
| T Engene AS | Construction | 1993 |
| T. Engene Invest AS | Construction | 2008 |
| T.I.B. Holding AS | Construction | 2025 |
| T.K. Holding AS | Construction | 2005 |
| T.K. Utleie AS | Administrative & support | 2023 |
| Takst & Eiendomsrådgivning AS | Professional & scientific | 2014 |
| Ting Holding AS | Wholesale & retail | 2005 |
| Tisleifjorden Båtutleie Da | Administrative & support | 2008 |
| Tlu AS | | 2025 |
| Tomas Bjerke Holding AS | Wholesale & retail | 2013 |
| Tomine Bed & Breakfast | Wholesale & retail | 1987 |
| Tor-Ove Langehaugen AS | Construction | 2024 |
| Tradisjonsbygg Eiendom AS | Real estate | 2020 |
| Tradisjonsbygg Trelast AS | Wholesale & retail | 2020 |
| Traktorservice AS | Wholesale & retail | 1990 |
| Transportservice Hallingdal AS | Transport & logistics | 2009 |
| Trehuspartner AS | Real estate | 1993 |
| Treskallar AS | Arts & recreation | 2026 |
| TS Aesthetics AS | Other services | 2026 |
| Tubbehaugen AS | Hospitality | 2016 |
| Tunnetjern AS | Real estate | 2013 |
| Turhus AS | Transport & logistics | 2000 |
| Turhus Invest AS | Construction | 2012 |