| Sjo Innvest AS | Financial services | 2005 |
| Sjor AS | Wholesale & retail | 2009 |
| Sjussa AS | Education | 2022 |
| Sjø Marineholmen AS | Real estate | 2025 |
| Sjøblikk Invest AS | Real estate | 2021 |
| SJØBOD1 Ans | Hospitality | 2020 |
| Sjøboden Bergen AS | Hospitality | 2006 |
| Sjøentreprenøren AS | Construction | 1999 |
| Sjølfallet Huseierlag SA | Real estate | 1985 |
| Sjøllaget AS | Wholesale & retail | 2025 |
| Sjølvsagt Driftslaug AS | Information & communication | 2023 |
| Sjømatbodene Da | Wholesale & retail | 2005 |
| Sjørvika AS | Financial services | 2005 |
| Sjøscenen AS | Arts & recreation | 2021 |
| Sjøss Bergen AS | Real estate | 2021 |
| Sjøss Invest AS | Financial services | 2014 |
| Sjøss Oslo AS | Real estate | 2021 |
| Sjøss Tromsø AS | | 2021 |
| Sjøstrøm Holding AS | Construction | 2005 |
| Sjøteknologen AS | Professional & scientific | 2013 |
| Sjøteknologen Slep AS | Transport & logistics | 2014 |
| SK Investering AS | Real estate | 2024 |
| Skaar Holding AS | Wholesale & retail | 2005 |
| Skaft Invest AS | | 2019 |
| Skakon Gruppen AS | Real estate | 2015 |
| Skalerbart Markerting AS | Professional & scientific | 2026 |
| Skan 90 Transport Ans | | 1990 |
| Skanselien Boligselskap AS | Households | 1958 |
| Skansemyren Holding AS | Professional & scientific | 2007 |
| Skansen Consulting AS | Professional & scientific | 2024 |
| Skansen Film Da | Information & communication | 2006 |
| Skarabé AS | Financial services | 2005 |
| Skareveien 1 AS | Real estate | 2008 |
| Skarholmen Næringspark AS | Real estate | 2008 |
| Skarv Fine Jewelry AS | Wholesale & retail | 2023 |
| Skarv Kapital AS | | 2026 |
| Skarven AS | Real estate | 1999 |
| Skat AS | | 2020 |
| Skavl 1 AS | Information & communication | 2025 |
| Skavl AS | Real estate | 2020 |
| Skavl Media AS | Administrative & support | 2025 |
| Skavl Media Invest AS | Information & communication | 2020 |
| SKB 209 AS | Real estate | 2021 |
| Skeielia 5 AS | Real estate | 2016 |
| Skeielia Næringspark AS | Real estate | 2010 |
| Skibsaksjeselskapet Storli | Transport & logistics | 1993 |
| Skibsaktieselskabet Dragesund AS | | 2020 |
| Skibsaktieselskapet Navigation Co Ltd | Transport & logistics | 1923 |
| Skiftesvik Invest AS | | 2025 |
| Skikkelig Gøy AS | Arts & recreation | 2021 |
| Skikkelig Vask AS | Administrative & support | 2021 |
| Skilbrei Utvikling AS | Information & communication | 2024 |
| Skillseedlings AS | Wholesale & retail | 2024 |
| Skin Coach AS | Other services | 2025 |
| Skinnboden Holding AS | Wholesale & retail | 2005 |
| Skinteam Norge AS | Other services | 2020 |
| Skintechnologies AS | Administrative & support | 2009 |
| Skiparviken Panorama AS | Real estate | 1997 |
| Skipet AS | Real estate | 2010 |
| Skipperhuset AS | Real estate | 2024 |
| Skipsaksjeselskapet Kollen AS | Financial services | 2000 |
| Skipsbyggerhallen AS | Real estate | 2007 |
| Skipsrevyen AS | Information & communication | 1999 |
| Skivdal Data AS | Information & communication | 2022 |
| Skivdal Invest AS | Information & communication | 2022 |
| Skivebakken 25 B AS | Real estate | 2013 |
| Skivebakken 33 B AS | Real estate | 2022 |
| Skivebakken 6 AS | Real estate | 2019 |
| Skivebakken Holding AS | | 2025 |
| Skjenet 4 AS | Real estate | 2016 |
| Skjevlingen AS | Financial services | 2005 |
| Skjold Regnskap AS | Professional & scientific | 2012 |
| Skjold Utvikling AS | Real estate | 2013 |
| Skjolddalen 10 AS | Real estate | 2018 |
| Skjoldhagen Næring AS | Real estate | 2019 |
| Skjoldnes Utvikling AS | Real estate | 2006 |
| Skjoldskifte Eiendom AS | Real estate | 2011 |
| Skjøndals Eiendom AS | Real estate | 1961 |
| Skjøndals Holding AS | Real estate | 2022 |
| Skjønhals Holding AS | Administrative & support | 1996 |
| Skjønn AS | Wholesale & retail | 2022 |
| Sklitakling Da | Arts & recreation | 2014 |
| Skog Invest AS | | 2017 |
| Skogimport Da | Wholesale & retail | 2008 |
| Skogland.Com AS | Professional & scientific | 2023 |
| Skogseth AS | | 2021 |
| Skogsvåg Utvikling AS | Real estate | 2017 |
| Skolefotografen Ans | Professional & scientific | 1990 |
| Skolekanalen AS | Education | 2017 |
| Skoltehaugen 6 AS | Real estate | 2014 |
| Skomakerhuset AS | Other services | 2012 |
| Skostredet 17 AS | Hospitality | 2018 |
| Skostredet AS | Real estate | 2021 |
| Skostredet Bistro AS | Hospitality | 2019 |
| Skostredet Hotel & Spa AS | Hospitality | 2015 |
| Skostredet Hotel AS | Real estate | 2019 |
| Skottegaten 21 B AS | Real estate | 2016 |
| Skrivergaten Eiendom AS | Real estate | 2023 |
| Skru Hove AS | Manufacturing | 2022 |
| SKS 246 AS | Real estate | 2018 |