| Selberg Holding AS | Professional & scientific | 2005 |
| Selbu Sparebankgården AS | Real estate | 1999 |
| Selbæk Eiendom AS | Real estate | 2015 |
| Select Beauty AS | Other services | 2021 |
| Self Care Clinic AS | Health & social care | 2023 |
| Seljedalen AS | Real estate | 2013 |
| Seljord Butikkeiendom 2 AS | Real estate | 2016 |
| Selka Eiendom AS | Real estate | 2016 |
| Sellanraa Bok & Bar AS | Wholesale & retail | 2016 |
| Selmer AS | Real estate | 2020 |
| Selmer Bolig AS | Real estate | 2019 |
| Selmer Energi AS | Information & communication | 2020 |
| Selmer Holding AS | Real estate | 2005 |
| Selsbakk Eiendom AS | Real estate | 2002 |
| Selto AS | Information & communication | 2021 |
| Selva Havn AS | Real estate | 2004 |
| Selva Marina AS | Real estate | 2019 |
| Selven Bygg AS | Construction | 2017 |
| Semsel AS | Health & social care | 2018 |
| Semsel Holding AS | Health & social care | 2007 |
| Senab Eikeland Midt-Nord AS | Wholesale & retail | 2017 |
| Sengemakeriet Gullaksen Møbler AS | Wholesale & retail | 1992 |
| Seniortex AS | Information & communication | 2013 |
| Senris AS | Real estate | 2000 |
| Senron AS | Financial services | 2005 |
| Sense Beauty AS | Other services | 2026 |
| Sense Holding AS | | 2016 |
| Sensorlink AS | Manufacturing | 2020 |
| Sensorlink Holding AS | Manufacturing | 2012 |
| Sensøl Holding AS | | 2024 |
| Senter for Krisepsykologi Trondheim Ans | Health & social care | 2000 |
| Senterkontoret AS | Professional & scientific | 2011 |
| Sentio Research Norge AS | Professional & scientific | 1997 |
| Sentisystems AS | Information & communication | 2021 |
| Sentra Pizza, Kebab Og Burger AS | Hospitality | 2017 |
| Sentrum Bolig AS | Real estate | 2022 |
| Sentrum Bygginvest AS | Real estate | 2004 |
| Sentrum Eiendom Ans | Real estate | 1995 |
| Sentrum Gynekologi AS | Health & social care | 2024 |
| Sentrum Gynekologi Drift AS | Health & social care | 2025 |
| Sentrum Gårdselskap AS | Real estate | 1974 |
| Sentrum Øyeklinikk AS | Health & social care | 2002 |
| Sentrumsgården Næring AS | Real estate | 2021 |
| Sentrumsgårdene AS | | 2024 |
| Sere III Norwegian Retail AS | Real estate | 2015 |
| Serisier AS | | 2022 |
| Servai AS | Information & communication | 2023 |
| Service 7024 AS | Construction | 2020 |
| Service BN Bygg AS | Construction | 2016 |
| Service Impact AS | Professional & scientific | 2025 |
| Service-Ringen AS | Professional & scientific | 2012 |
| Service-Tech AS | Wholesale & retail | 2010 |
| Servicesentralen Kattem Ust SA | Administrative & support | 1977 |
| Servida AS | Administrative & support | 2025 |
| Ses Capital AS | | 2022 |
| Sesam AS | Hospitality | 1995 |
| Sesam Trondheim AS | Hospitality | 2019 |
| Sesch Holding AS | | 2021 |
| Sest 1 AS | Real estate | 2022 |
| Seterveien AS | Administrative & support | 2019 |
| Setra Byggprodukter AB | Wholesale & retail | 1995 |
| Setra Travaror AB | Wholesale & retail | 2006 |
| Setrom Holding AS | Health & social care | 2005 |
| Sevas Eiendom AS | Real estate | 2023 |
| Sevas Holding AS | Real estate | 2023 |
| Seven Invest AS | Real estate | 2004 |
| Seven Studio AS | Wholesale & retail | 2023 |
| Severin Suveren AS | | 2008 |
| Sevla Holding AS | | 2025 |
| SFS AS | Hospitality | 2014 |
| SG Feriebolig AS | Real estate | 2022 |
| SG Utbygging AS | Real estate | 2007 |
| Sgbolig AS | Real estate | 2019 |
| SGM Holding AS | Financial services | 2005 |
| SH Fjordgata Eiendom AS | Real estate | 1999 |
| SH Produkter AS | Wholesale & retail | 1997 |
| Sha Consult AS | Professional & scientific | 2026 |
| Sha Rådgiveren AS | Professional & scientific | 2019 |
| Shaho Holding AS | | 2024 |
| Shakeri Holding AS | | 2025 |
| Shanmugathas Invest AS | | 2023 |
| Sharenotwaste AS | Information & communication | 2020 |
| Sharented AS | Information & communication | 2016 |
| Sharing Nordic AS | Professional & scientific | 2021 |
| Shelter AS | Financial services | 2005 |
| Shelter Eiendom AS | Financial services | 2008 |
| Shine in AS | Wholesale & retail | 2001 |
| Shinvest 2 AS | | 2024 |
| Shinvest AS | | 2023 |
| Shira AS | | 2019 |
| Shirzadi Holding AS | Wholesale & retail | 2024 |
| Shithappens Holding AS | | 2021 |
| SHJ Holding AS | Real estate | 2013 |
| Shjell Invest AS | | 2013 |
| SHL Eiendom AS | Real estate | 2021 |
| SHN Tomt 14 AS | Real estate | 2019 |
| SHN Tomt 15 AS | Real estate | 2019 |
| SHN Tomt 3 AS | Real estate | 2018 |
| SHN Ventures AS | | 2024 |
| Sho Holding AS | Professional & scientific | 2007 |