| Sandsli Eiendom AS | Real estate | 1999 |
| Sandsliveien 90 AS | Real estate | 2007 |
| Sandtunet SA | Real estate | 1990 |
| Sandvedparken AS | Real estate | 2017 |
| Sandviks AS | Information & communication | 1965 |
| Sandvikveien 18 AS | Real estate | 2015 |
| Sandy Invest AS | | 2025 |
| Saneha Holding AS | | 2025 |
| Saneha Real Estate AS | Hospitality | 2025 |
| Sangnes Eiendom AS | Real estate | 1996 |
| Sangnes Holding AS | Administrative & support | 2007 |
| Sangnes Invest AS | Administrative & support | 2007 |
| Sanjo Invest AS | | 2018 |
| Sann AS | Professional & scientific | 2016 |
| Sanordic Group AS | | 2025 |
| Sanro AS | | 2025 |
| Sanro Bruktbil AS | Wholesale & retail | 2012 |
| Sans Arkitekter AS | Professional & scientific | 2025 |
| Sansu AS | Professional & scientific | 2019 |
| Sapientia Invest AS | Real estate | 2023 |
| Sar Eiendomsforvaltning AS | Real estate | 2008 |
| Sara Fossum Holding AS | | 2025 |
| Sarema AS | Hospitality | 2015 |
| Sarepta Oil AS | Mining & quarrying | 2016 |
| Saruni AS | Financial services | 2018 |
| Sasya AS | Wholesale & retail | 2022 |
| Sate Eiendom AS | Real estate | 2006 |
| Satlog AS | Professional & scientific | 2014 |
| Satya Eiendom AS | Real estate | 2025 |
| Saure Holding AS | Information & communication | 2015 |
| Savant Tech AS | Professional & scientific | 2013 |
| Save Eiendom Holding AS | Real estate | 2018 |
| Save Estatement AS | Financial services | 2012 |
| Save Innvest 1 AS | Real estate | 2011 |
| Save Invest Holding AS | Real estate | 2018 |
| Save Securities AS | Financial services | 2012 |
| Savoca AS | Real estate | 2005 |
| Savor AS | Hospitality | 2014 |
| SB Eiendom 1 AS | Real estate | 2025 |
| SB Eiendom 2 AS | Real estate | 2025 |
| SB International Property Holdings AS | Real estate | 2007 |
| SB Rental AS | Transport & logistics | 2013 |
| Sbi Holding AS | | 2020 |
| Sbo AS | Professional & scientific | 2022 |
| SC SPV AS | | 2025 |
| Scan Learn AS | Real estate | 1993 |
| Scan One AS | Administrative & support | 1997 |
| Scan Safe AS | Wholesale & retail | 1976 |
| Scan Tech AS | Mining & quarrying | 1995 |
| Scan-Vin AS | Wholesale & retail | 1996 |
| Scandic Plastic AS | Wholesale & retail | 2020 |
| Scandinav Global AS | | 2015 |
| Scandinavian Gulf AS | Professional & scientific | 2016 |
| Scanocean AB (Nuf) | Wholesale & retail | 2025 |
| Scantest AS | Professional & scientific | 2020 |
| Scanwell AS | Mining & quarrying | 2007 |
| Scanwell Holding AS | Real estate | 2007 |
| Scanwell Technology AS | Professional & scientific | 2012 |
| SCENE43 AS | Arts & recreation | 2013 |
| Schanke Holding AS | Financial services | 2005 |
| Schankeholen Holding AS | Hospitality | 2017 |
| Schea Holding AS | Administrative & support | 2011 |
| Scherer AS | | 2014 |
| Scherer Lve AS | Real estate | 2003 |
| Schibevaag AS | | 2011 |
| Schimelstad AS | Real estate | 2024 |
| Schjelderup Arkitektur AS | Professional & scientific | 2022 |
| Schlumberger Global Resources Ltd Nuf | Administrative & support | 2002 |
| Schlumberger Norge AS | Mining & quarrying | 1993 |
| Schlumberger Offshore Services Limited Nuf | Mining & quarrying | 1996 |
| Schlumberger Oilfield UK Limited Nuf | Administrative & support | 2008 |
| Schoolhub AS | Information & communication | 2023 |
| Scientio AS | Information & communication | 2021 |
| Scitus AS | Professional & scientific | 2019 |
| Scorebox AS | Information & communication | 2023 |
| Scott Spirit LLC Nuf | Administrative & support | 2023 |
| Scottish Enterprise | Professional & scientific | 2012 |
| Scouting AS | Professional & scientific | 2007 |
| Scouting Da | Professional & scientific | 1999 |
| Screen Story AS | Information & communication | 2003 |
| Screen Story Film Og TV AS | Information & communication | 2019 |
| SCT. Fav AS | | 2021 |
| Scuderia Energia AS | Professional & scientific | 2023 |
| SDS Investment AS | Real estate | 2019 |
| Sea Barge 1 AS | Administrative & support | 2024 |
| Sea Qiq AS | Wholesale & retail | 2007 |
| Sea-Electric AS | Construction | 2017 |
| Seabrokers 1 AS | Professional & scientific | 2021 |
| Seabrokers 2 AS | Professional & scientific | 2021 |
| Seabrokers 3 AS | Professional & scientific | 2021 |
| Seabrokers AS | Professional & scientific | 1982 |
| Seabrokers Chartering AS | Transport & logistics | 1999 |
| Seabrokers Dolomiti AS | Construction | 2022 |
| Seabrokers Eiendom AS | Real estate | 2004 |
| Seabrokers Eiendom II AS | Real estate | 2016 |
| Seabrokers Eiendom Industry Holdco AS | Real estate | 2025 |
| Seabrokers Eiendom Office Holdco AS | Real estate | 2025 |
| Seabrokers Fundamentering AS | Construction | 2006 |
| Seabrokers Fundamentering Sjø AS | Construction | 2023 |
| Seabrokers Group AS | Real estate | 2018 |