| Snowbox AS | Information & communication | 2022 |
| Socki Invest AS | | 2024 |
| Sofiemyrveien 14 AS | Real estate | 2019 |
| Sofigate Norway AS | Professional & scientific | 2023 |
| Softox Defense Solutions AS | Professional & scientific | 2021 |
| Softox Solutions AS | Professional & scientific | 2012 |
| Softox Wound & Skin Care AS | Professional & scientific | 2018 |
| Sohlberg & Toftenes AS | Professional & scientific | 1991 |
| Sohltoft Holding AS | Professional & scientific | 2023 |
| Solera Norge AS | Wholesale & retail | 2002 |
| Solera Spirits AS | Wholesale & retail | 2014 |
| Solheimsgaten 7 a AS | Real estate | 2007 |
| Solheimsgaten 7 B AS | Real estate | 2016 |
| Solheimsgaten 7 C AS | Real estate | 2016 |
| Solheimsgaten 7 D AS | Real estate | 2016 |
| Solheimsgaten 7 E AS | Real estate | 2016 |
| Solligården Bolig Da | Real estate | 2014 |
| Solliveien 53-55 AS | Real estate | 2007 |
| Solutec VVS AS | Construction | 2014 |
| Sommelier AS | Wholesale & retail | 2006 |
| Son Hotelleiendom AS | Real estate | 2005 |
| Sony Europe B.V. Nuf | Wholesale & retail | 2010 |
| Sony Europe Limited Nuf | Administrative & support | 2024 |
| Sorma Invest AS | Real estate | 1998 |
| Sos International A/S Nuf | Health & social care | 2019 |
| Sos Veihjelp AS | Transport & logistics | 2014 |
| Sotera AS | Information & communication | 1998 |
| Spaalen AS | Financial services | 2017 |
| Sperling Medic AS | Health & social care | 2023 |
| Spesialistklinikkene AS | Health & social care | 2017 |
| SPG AS | Energy | 2018 |
| Spin AS | Professional & scientific | 2009 |
| Sprocketspring Holding AS | | 2026 |
| ST6 Design AS | Real estate | 2019 |
| Stadion Utbygging AS | Real estate | 2006 |
| Stadion Utbygging KS | Real estate | 2006 |
| Stavern Customs AS | Wholesale & retail | 2020 |
| Staying Organized AS | Other services | 2018 |
| Steklo AS | Wholesale & retail | 2024 |
| Stenberg & Blom AS | Wholesale & retail | 2002 |
| Stenberg-Gruppen AS | Real estate | 1997 |
| Stenersen Chartering AS | Transport & logistics | 2011 |
| Stephansen Invest AS | Real estate | 2005 |
| Stig Elsfjordstrand AS | Financial services | 2005 |
| Stigar AS | Real estate | 2019 |
| Stigar Eiendom AS | Real estate | 2019 |
| Stigar Håndverk AS | Real estate | 2026 |
| Stillverksveien 28 AS | Real estate | 2014 |
| Stjernedrysset AS | Other services | 2013 |
| Store Landfall AS | Real estate | 2014 |
| Storebrand & SPP Business Services Norge Nuf | Administrative & support | 2016 |
| Storebrand Aif AS | Financial services | 2024 |
| Storebrand ASA | Financial services | 1847 |
| Storebrand Asset Management AS | Financial services | 1981 |
| Storebrand Bank ASA | Financial services | 1989 |
| Storebrand Boligkreditt AS | Financial services | 2006 |
| Storebrand Dikeveien Hjemmel AS | Real estate | 2005 |
| Storebrand Drammensveien 185 AS | Real estate | 2017 |
| Storebrand Eiendom Trygg AS | Real estate | 1996 |
| Storebrand Eiendom Utvikling AS | Real estate | 2006 |
| Storebrand Eiendom Vekst AS | Real estate | 2015 |
| Storebrand Eiendomsfond Invest AS | Financial services | 2010 |
| Storebrand Eiendomsfond Norge AS | Financial services | 2010 |
| Storebrand Eiendomsfond Norge Feeder AS | Financial services | 2020 |
| Storebrand Eiendomsfond Norge KS | Financial services | 2010 |
| Storebrand Facilities AS | Real estate | 2019 |
| Storebrand Filipstad Brygge AS | Real estate | 1992 |
| Storebrand Forsikring AS | Financial services | 1923 |
| Storebrand Hjemmel AS | Real estate | 2006 |
| Storebrand Hoffsveien 1A-1E AS | Real estate | 2013 |
| Storebrand Infrastruktur AS | Financial services | 2007 |
| Storebrand Kjøpesenter Kvadrat I Ans | Real estate | 1987 |
| Storebrand Kjøpesenter Kvadrat II Ans | Real estate | 1987 |
| Storebrand Kjøpesenter Østfoldhallen AS | Real estate | 1989 |
| Storebrand Livsforsikring AS | Financial services | 1990 |
| Storebrand Lysaker Torg 5-25 AS | Real estate | 2013 |
| Storebrand Pensjonstjenester AS | Financial services | 1982 |
| Storebrand Real Estate AS | Financial services | 2025 |
| Storebrand Ruseløkkveien 3 AS | Real estate | 2025 |
| Storebrand Ruseløkkveien 5 AS | Real estate | 2025 |
| Storebrand Vogellund 31 AS | Real estate | 2020 |
| Storebrand Vogellund 35 AS | Real estate | 2005 |
| Storebrand Økern AS | Real estate | 2006 |
| Stormåsan 19 AS | Real estate | 2006 |
| Storveien 9 AS | Real estate | 2014 |
| Strait Air Transport AS | Transport & logistics | 1985 |
| Strandveien 16-18 Eiendom AS | Real estate | 2022 |
| Strandveien 16-18 Holding AS | Real estate | 2022 |
| Strandveien 20 Invest AS | Real estate | 2013 |
| Strandveien 50 AS | Real estate | 2024 |
| Strandveien 50 Holding AS | | 2024 |
| Strandveien Eiendom AS | Real estate | 2005 |
| Strandveien Garasjeanlegg AS | Real estate | 2022 |
| Stratos Invest AS | Real estate | 2005 |
| Strömberg & Sandell AS | Professional & scientific | 2011 |
| Strømsgodset Utvikling AS | Real estate | 2020 |
| Støve Holding AS | | 2022 |
| Sugarloaf Bidco AS | | 2025 |
| Summit Innovation Group AS | Professional & scientific | 2024 |
| Summit Norse of Norway AS | Professional & scientific | 2024 |