| Skagenkaien Eiendom AS | Real estate | 2017 |
| Skagenkaien Holding AS | Real estate | 2013 |
| Skagenkaien Investering AS | Real estate | 2017 |
| Skambankt AS | Arts & recreation | 2021 |
| Skan Holding AS | | 2016 |
| Skanem AS | Manufacturing | 1997 |
| Skanem Eiendom AS | Real estate | 2020 |
| Skann Marked AS | Professional & scientific | 2013 |
| Skansegaten 2 AS | Real estate | 2014 |
| Skansegaten Eiendom AS | Real estate | 2016 |
| Skansen AS | Hospitality | 1993 |
| Skansen Investering AS | Real estate | 2005 |
| Skapvekst AS | Professional & scientific | 2023 |
| Skar Geoconsult AS | Professional & scientific | 2021 |
| Skarrus Holding AS | | 2021 |
| Skaugen Invest AS | Real estate | 1987 |
| Skaugum Eiendomsutvikling AS | Real estate | 2001 |
| Skaustein Invest AS | | 2025 |
| Skavhaug IT Consulting AS | Information & communication | 2016 |
| Skavland Invest AS | Real estate | 2014 |
| Skeiane Stasjon Utvikling AS | Real estate | 2023 |
| Skeidar Tvedtsenteret AS | Wholesale & retail | 2013 |
| Skeide Capital Allocation AS | | 2023 |
| Skeie Hageglede Og Renhold AS | Administrative & support | 2026 |
| Skeie Investering AS | | 2008 |
| Skeie Seating AS | Wholesale & retail | 2014 |
| Skeiseid-Klefstad Holding AS | | 2021 |
| Skew AS | Professional & scientific | 2018 |
| Ski- Og Skogsopplevelser AS | Education | 2020 |
| Skiferbakken 3 AS | Real estate | 2019 |
| Skift Invest AS | | 2020 |
| Skin Balance AS | Other services | 2019 |
| Skinnservice T.E AS | Wholesale & retail | 2017 |
| Skinzone Medispa AS | Health & social care | 2021 |
| Skipavik Invest AS | Professional & scientific | 2006 |
| Skipper Worse AS | Health & social care | 1997 |
| Skjeggestad AS | Health & social care | 2006 |
| Skjelbred Invest AS | | 2018 |
| Skjellco Holding AS | Real estate | 2022 |
| Skjoldblad Vind AS | Energy | 2022 |
| Skjærpe Invest AS | | 2022 |
| Skkj AS | | 2021 |
| Sknudsen AS | Professional & scientific | 2018 |
| Skoddajazz Da | Arts & recreation | 2026 |
| Skoglund AS | Health & social care | 2018 |
| Skoglund Heim AS | Real estate | 2025 |
| Skogsbakken AS | Financial services | 2005 |
| Skogsbakken Invest AS | Real estate | 2009 |
| Skogstøstraen Utvikling AS | Real estate | 2025 |
| Skoledata AS | Information & communication | 2006 |
| Skont Da | Arts & recreation | 2025 |
| Skorda AS | Professional & scientific | 2020 |
| Skorpio AS | Professional & scientific | 2025 |
| Skretting Aquaculture Innovation AS | Professional & scientific | 1980 |
| Skretting AS | Manufacturing | 2005 |
| Skrid Aktsomhet AS | Professional & scientific | 2021 |
| Skrid Holding AS | Professional & scientific | 2018 |
| Skrog Eiendom AS | Real estate | 2006 |
| Skrotnissene Invest AS | Financial services | 2017 |
| Skrue Invest AS | Professional & scientific | 2005 |
| Skulin Holding AS | Professional & scientific | 2018 |
| Skulle Invest AS | Professional & scientific | 2022 |
| Skur 2 Ans | Real estate | 2004 |
| Skvadronvegen 29 AS | Real estate | 2005 |
| Skvulp Da | Wholesale & retail | 1999 |
| Skybert AS | Real estate | 2011 |
| Skybuffer AS | Information & communication | 2013 |
| Skyeward AS | Professional & scientific | 2023 |
| Skyfri Investering AS | Professional & scientific | 2023 |
| Skyggebror Da | Arts & recreation | 2021 |
| Skyheim AS | Information & communication | 2019 |
| Skylal AS | Professional & scientific | 2018 |
| Skyura AS | Professional & scientific | 2025 |
| SL Geologi AS | Professional & scientific | 2007 |
| Sladresvingen Holding AS | Construction | 2008 |
| Slagkraft AS | Arts & recreation | 2009 |
| Slakterbutikk Utebo AS | Wholesale & retail | 2024 |
| Slant AS | Professional & scientific | 2017 |
| Sleipnir Auto AS | Wholesale & retail | 2026 |
| Sletbakk Holding AS | | 2025 |
| Slettebø Markedsrådgivning AS | Professional & scientific | 2004 |
| Slettmyrveien 31 AS | Real estate | 2025 |
| Slingshot I AS | | 2021 |
| Slize Pizza AS | Hospitality | 2025 |
| Slogsvig Invest AS | | 2023 |
| Slush Distribusjon AS | Wholesale & retail | 1991 |
| Slør Consulting AS | Professional & scientific | 2023 |
| Smagen På Skagen AS | Hospitality | 2012 |
| Smak Av Hav Gruppen Holding AS | Wholesale & retail | 2018 |
| Smak Av Havet AS | Wholesale & retail | 2018 |
| Smart Behandling AS | | 2022 |
| Smart Farm AS | Manufacturing | 2001 |
| Smart Id AS | Professional & scientific | 2021 |
| Smart Installations AS | Construction | 2000 |
| Smart Intervention AS | Professional & scientific | 2006 |
| Smart Lys Behandling AS | Health & social care | 2022 |
| Smart Management AS | Information & communication | 2006 |
| Smart Sea System AS | Information & communication | 2015 |
| Smartbo Bryne AS | Real estate | 2003 |
| Smartcoil Solution AS | Professional & scientific | 2015 |