| Sarpsborg Telecom AS | Sarpsborg | 2011 |
| SARPSBORG24 AS | Sarpsborg | 2015 |
| Sarutra AS | Saupstad | 2024 |
| SAS Institute AS | Oslo | 1986 |
| Sasak AS | Knarrevik | 2018 |
| Sasilia Management Limited | Oslo | 2008 |
| Satcom Nordic AS | Oslo | 1995 |
| Satcon AS | Trondheim | 2017 |
| Satellitt Studio AS | Harstad | 2020 |
| Satello AS | Oslo | 2025 |
| Satirius Ltd Nuf | Blommenholm | 2015 |
| Satsehuset AS | Kristiansand S | 2026 |
| Satvision Software AS | Oslo | 2024 |
| Sauer Nilssen IT AS | Oslo | 2017 |
| Saugestad Produksjon AS | Oslo | 2004 |
| Saul AS | Oslo | 2024 |
| Saumfar AS | Bergen | 2026 |
| Saunatech AS | Sandnes | 2025 |
| Saure Holding AS | Stavanger | 2015 |
| Saurus Animation AS | Oslo | 2020 |
| Savanne AS | Oslo | 1990 |
| Save File AS | Oslo | 2017 |
| Save Solutions AS | Laksevåg | 2005 |
| Saveocean AS | Asker | 2025 |
| Saver AS | Skedsmokorset | 2020 |
| Savest AS | Elverum | 2023 |
| Saveyarn AS | Tromsø | 2023 |
| Savi Tech AS | Steinkjer | 2026 |
| Savn AS | Frogner | 2026 |
| Savvy AS | Bergen | 2020 |
| Savvy Holding AS | Bergen | 2024 |
| Saxe.Tech AS | Valderøya | 2024 |
| Saxotech A/S | 9000 Aalborg | 2001 |
| Saxrud, Bjønness & Gule Da | Oslo | 2004 |
| Say No Ans | Oslo | 2006 |
| Sayfr AS | Oslo | 2018 |
| Sayit Consulting AS | Skoppum | 2002 |
| Sayonara AS | Oslo | 2002 |
| SB Digital Da | Sandnes | 2023 |
| SB Konsult AS | Moss | 2018 |
| SB Tech AS | Flekkefjord | 2022 |
| SB Technologies AS | Bergen | 2026 |
| SBC Invest AS | Rådal | 2018 |
| Sbht Consulting AS | Fjellhamar | 2022 |
| Sbht Holding AS | Fjellhamar | 2021 |
| Sbit AS | Oslo | 2022 |
| SBR AS | Trondheim | 2018 |
| SBS Service AS | Aureosen | 2007 |
| SBW Invest II AS | Sykkylven | 2005 |
| SC Fund AS | Bergen | 2006 |
| SC Fund Holding AS | Bergen | 2012 |
| SC Network Advisory AS | Oslo | 2026 |
| SC Web Services AS | Kvaløya | 2019 |
| Scailar AS | Randaberg | 2025 |
| Scala Nordic AS | Oslo | 2000 |
| SCALA4 Solution AS | Oslo | 2016 |
| Scale Aquaculture Software AS | Bergen | 2023 |
| Scale Bespoke AS | Rømskog | 2022 |
| Scalemem AS | Oslo | 2022 |
| Scalemoon Studios AS | Reistad | 2025 |
| Scalepoint Technologies Norway AS | Oslo | 2003 |
| Scaletalk Communications AS | Tårnåsen | 2025 |
| Scaleuplab AS | Oslo | 2019 |
| Scalign AS | Høvik | 2025 |
| Scalytica AS | Heggedal | 2021 |
| Scan-Net AS | Lierstranda | 1989 |
| Scandi Film AS | Sandnes | 2015 |
| Scandic Cloud Solutions AS | Nannestad | 2017 |
| Scandic Digi Solutions AS | Oslo | 2023 |
| Scandic Fusion Analytics AS | Oslo | 2024 |
| Scandic Fusion Epm AS | Oslo | 2024 |
| Scandic Fusion Tech AS | Oslo | 2024 |
| Scandic IT Recycle AS | Sola | 2024 |
| Scandic IT Service AS | Sola | 2025 |
| Scandic Software AS | Hundvåg | 2016 |
| Scandicert AS | Oslo | 2020 |
| Scandiknit AS | Ålgård | 2023 |
| Scandilit Publishing AS | Røsvik | 2025 |
| Scandinavian Consultancy Services Ltd | Slough Sl2 4Lf | 2015 |
| Scandinavian Creator Community AS | Fredrikstad | 2022 |
| Scandinavian Film Distribution AS | Oslo | 2022 |
| Scandinavian Geo Services AS | Oslo | 2018 |
| Scandinavian House AS | Moss | 2005 |
| Scandinavian Journal of Educational Research AS | Oslo | 2016 |
| Scandinavian Reach Technologies AS | Haugesund | 2015 |
| Scandinavian Satellite Radio AS | Randaberg | 2001 |
| Scandinavian Tamil Media Group AS | Oslo | 2017 |
| Scandinavian Tele-Media Services Ans | Sandnes | 1998 |
| Scandinavian Veterinary Press AS | Drøbak | 2003 |
| Scandinavian Vibes AS | Bekkestua | 2015 |
| Scandinavian Web AS | Kristiansand S | 2015 |
| Scandinavien Business Group AS | Nesøya | 2025 |
| Scandit AG | 8005 Zürich | 2018 |
| Scanditech Solutions AS | Kråkerøy | 2024 |
| Scandpower Petroleum Technology GmbH | Kjeller | 2008 |
| Scanly AS | Oslo | 2026 |
| Scanmine AS | Ski | 2003 |
| Scansec Consulting AS | Elverum | 2025 |
| Scantrader Consulting AS | Fredrikstad | 2015 |
| Scanvet Informasjonskontor | Oslo | 2001 |