| Skagerak Venture Capital AS | Financial services | 2006 |
| Skagerak Venture Capital I AS | Financial services | 2020 |
| Skagerrak Eiendom AS | Real estate | 2025 |
| Skagerrak Holding AS | Real estate | 2025 |
| Skanbatt Eiendom AS | Real estate | 2024 |
| Skanbatt Holding AS | Wholesale & retail | 2024 |
| Skandia Greenpower AS | Energy | 2015 |
| Skandia Smarthus AS | Professional & scientific | 2017 |
| Skandiaenergi Omsetning AS | Energy | 2015 |
| Skandinavisk Batteriimport Norge AS | Wholesale & retail | 2024 |
| Skandinavisk Trafikksenter AS | Education | 2004 |
| Skarpøya Renseanlegg SA | Water & waste | 2008 |
| Skas AS | Wholesale & retail | 2008 |
| Skeidar Kristiansand AS | Wholesale & retail | 1998 |
| Skeie Consult AS | Professional & scientific | 2021 |
| Skeie Consultants AS | Professional & scientific | 2002 |
| Skeie Drift AS | Transport & logistics | 2013 |
| Skeie Eiendom AS | Real estate | 1986 |
| Skeie Kapital AS | Real estate | 2007 |
| Skeie Teknologi AS | Professional & scientific | 1989 |
| Skeiefondet AS | Other services | 2014 |
| Skeiegruppen AS | Real estate | 2020 |
| Skeivoll Capital AS | | 2025 |
| Skeivoll Holding AS | Real estate | 2016 |
| Skhp Advisory&Investments AS | Professional & scientific | 2016 |
| Skibåsen 12 B Ans | Real estate | 2007 |
| Skibåsen 20 AS | Real estate | 2013 |
| Skibåsen 20C AS | Real estate | 2005 |
| Skibåsen 22 AS | Other services | 2001 |
| Skibåsen 24 a AS | Real estate | 2005 |
| Skibåsen 28 AS | Real estate | 2001 |
| Skibåsen 28B AS | Real estate | 2025 |
| Skibåsen 3 Og 5 Eiendom AS | Real estate | 2011 |
| Skibåsen 30 AS | Real estate | 2006 |
| Skibåsen 33 AS | Real estate | 2007 |
| Skibåsen 33 I AS | Real estate | 2011 |
| Skibåsen 35 AS | Real estate | 2019 |
| Skibåsen 37 a AS | Real estate | 2023 |
| Skibåsen 39 AS | Real estate | 2009 |
| Skibåsen 40 AS | Real estate | 2007 |
| Skibåsen 40D AS | Real estate | 2007 |
| Skibåsen 42 AS | Real estate | 2012 |
| Skibåsen 44 AS | Real estate | 2005 |
| Skibåsen 47 AS | Real estate | 2011 |
| Skibåsen 7 AS | Real estate | 2014 |
| Skibåsen 8 AS | Real estate | 2007 |
| Skibåsen AS | Real estate | 2011 |
| Skibåsen Eiendom AS | Real estate | 2019 |
| Skibåsen Park AS | Real estate | 2006 |
| SKIBÅSEN20A AS | Real estate | 2019 |
| Skifiks AS | Professional & scientific | 2000 |
| Skillingen Mynt Og Sedler Ans | | 1990 |
| Skilt & Reklame Sør AS | Professional & scientific | 2013 |
| Skiltdesign AS | Manufacturing | 1999 |
| Skiltek AS | Professional & scientific | 2026 |
| Skiltopp AS | Professional & scientific | 2016 |
| Skintell AS | Information & communication | 2025 |
| Skipmannsheia Sol- Og Batteripark AS | Energy | 2025 |
| Skipper Eiendom AS | Real estate | 2007 |
| Skippergata 10 AS | Real estate | 2017 |
| Skippergata 20 AS | Real estate | 2021 |
| Skippergata 24B AS | Real estate | 2021 |
| Skippergata 28 AS | Real estate | 2024 |
| Skippergata 36 AS | Real estate | 2008 |
| Skippergata 97 AS | Real estate | 2005 |
| Skippergaten 12-18 AS | Real estate | 2008 |
| Skippergaten 28 Da | Real estate | 2000 |
| Skippergaten 3-5 AS | Real estate | 1994 |
| Skippergaten 59 AS | Real estate | 2014 |
| Skippergaten 7 AS | Real estate | 1997 |
| Skippergården Eiendom AS | Real estate | 2008 |
| Skjeldal Consult AS | Information & communication | 2024 |
| Skjoldmøy Shop Da | Wholesale & retail | 2023 |
| Sko-Service Ans | | 1990 |
| Skodriff AS | | 2023 |
| Skogkanten Holding AS | Professional & scientific | 2024 |
| Skogkonsult AS | Agriculture & fishing | 2001 |
| Skole Og Barnehageservice AS | Wholesale & retail | 2014 |
| Skolinio AS | Wholesale & retail | 2014 |
| Skolt Invest AS | | 2023 |
| Skone AS | Construction | 2016 |
| Skonnertveien 2B AS | Real estate | 2005 |
| Skotique AS | Wholesale & retail | 2005 |
| Skram Capital AS | | 2025 |
| Skreddersøm AS | Manufacturing | 2022 |
| Skretteberg Edb AS | Information & communication | 1979 |
| Skretteberg Regnskap AS | Professional & scientific | 1983 |
| Skrin AS | | 2023 |
| Skrotnissen AS | Wholesale & retail | 2025 |
| Skruehuset AS | Wholesale & retail | 2010 |
| Skrutek Bilverksted AS | Other services | 2022 |
| Skråstad Gård AS | Agriculture & fishing | 2019 |
| Skråstad Opplevelser AS | Administrative & support | 2022 |
| SKS Energi AS | | 2026 |
| Skudeviga Holding AS | Real estate | 2004 |
| Skuland Olsen AS | | 2012 |
| Skuland Vaktmestertjenester AS | Administrative & support | 2021 |
| Skullerud Industribygg AS | Real estate | 1993 |
| Skuthe Holding AS | Manufacturing | 2021 |
| Sky Sushi VT AS | Hospitality | 2023 |