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| Sans Trafikkskole Vestby AS | Vestby | 2023 |
| Sanselåven AS | Oslo | 2012 |
| Santosha AS | Drøbak | 2016 |
| Saoirse AS | Skaun | 2013 |
| Sapio AS | Aksdal | 2005 |
| Sapt AS | Strandvik | 2025 |
| Saraby-Schiager Invest AS | Lommedalen | 2022 |
| Sarpsborg Trafikkskole AS | Sarpsborg | 2005 |
| Satellite Holding AS | Eidsvoll Verk | 2022 |
| Satya Yoga AS | Sandnes | 2020 |
| Sauafjellet Fus Barnehage AS | Skogsvåg | 2019 |
| Sauda Trafikkskole AS | Sauda | 2017 |
| Sauvik Invest AS | Stadlandet | 2026 |
| Savoir AS | Rørvik | 2025 |
| Saxenborg Barnehage SA | Trondheim | 2006 |
| SB Trafikkskole AS | Greåker | 2023 |
| Sbhgolf AS | Årnes | 2023 |
| SBK Base AS | Tananger | 2015 |
| Sbkf Videregående Skole AS | Fredrikstad | 2025 |
| SBL Konsulentvirksomhet AS | Sandvika | 2021 |
| Scala Private Barnehage SA | Oslo | 1999 |
| Scalagroup AS | Oslo | 2025 |
| Scaleup AS | Oslo | 2022 |
| Scandi Chan AS | Elnesvågen | 2025 |
| Scandinavian Beauty and Wellness Technology AS | Drammen | 2009 |
| Scandinavian Executive Institute | Dk-6000 Kolding | 2022 |
| Scandinavian Seaplane Training AS | Bergen | 2019 |
| Scandinavian Simulation & Training Company AS | Sola | 2026 |
| Scandinavian Ski Academy AS | Øyer | 1997 |
| Scandinavian Solutions AS | Skedsmokorset | 2015 |
| Scandiq AS | Moss | 2007 |
| Scenario AS | Sandvika | 1981 |
| Scenesterk AS | Oslo | 2024 |
| Schaathun AS | Horten | 2024 |
| Schaathun Undervisning AS | Horten | 2024 |
| Schjølberg Trafikkskole AS | Skjeberg | 2017 |
| Schneider Invest AS | Oslo | 2017 |
| Schumacher Carling AS | Oslo | 2022 |
| Schumacher Consulting AS | Oslo | 2022 |
| Schwung AS | Hafslundsøy | 2020 |
| Scrollytell AS | Tønsberg | 2020 |
| Scuola D'Italiano Italienske Skolen AS | Oslo | 2002 |
| SE Folk AS | Jar | 2022 |
| Seal Consult AS | Hundvåg | 2023 |
| Seaspeed AS | Bodø | 2023 |
| Sebastian Aslaksrud AS | Råde | 2020 |
| Sebastian Christensen AS | Kongsberg | 2014 |
| Secko AS | Hellesøy | 2021 |
| Secure Work AS | Hønefoss | 2013 |
| Security Meetings AS | Moss | 2021 |
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| Segtnan Kunnskapsutvikling AS | Mosjøen | 2007 |
| Seier AS | Nedenes | 2014 |
| Seiersborg Videregående Skole Follo AS | Fredrikstad | 2020 |
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| Seim Consult AS | Høvik | 1997 |
| Seishan AS | Lepsøy | 2005 |
| Sekse Montessoriskule SA | Hovland | 2012 |
| Sekstini Nord AS | Sommarøya | 2003 |
| Selina Baumer - Coaching & Art Nuf | Bøstad | 2025 |
| Seljord Fjelltjeneste AS | Seljord | 2001 |
| Seljord Hestesenter AS | Seljord | 2011 |
| Selskap 1 AS | Asker | 2018 |
| Selungene Babysvømmeklubb AS | Oslo | 2012 |
| Selvledelse AS | Harstad | 2024 |
| Sem Barnehage SA | Asker | 1990 |
| Sennerud Fus Barnehage AS | Sørumsand | 2018 |
| Sens Utvikling AS | Oslo | 2017 |
| Sensato AS | Skien | 2024 |
| Sense of Science AS | Stavanger | 2013 |
| Sensora AS | Mo I Rana | 2025 |
| Senter for Eiendomsfag AS | Oslo | 1997 |
| Senter for Etterutdanning Da | Kristiansund N | 1995 |
| Senter for Integral Mindfulness Da | Larvik | 2020 |
| Senter for Læring AS | Oslo | 2024 |
| Senter for Positiv Psykologi AS | Jakobsli | 2013 |
| Senter for Prestasjonscoaching Ans | Kristiansand S | 2005 |
| Senter for Riktig Ernæring AS | Trysil | 2009 |
| Senterbarnehagen Fus AS | Drammen | 2019 |
| Sentire AS | Vestby | 2024 |
| Sentrum Barnehage AS | Vinstra | 2014 |
| Sentrum Trafikk Skole AS | Finnsnes | 2008 |
| Sentrum TRAFIKKSKOL1 AS | Stokmarknes | 2020 |
| Sentrum Yoga AS | Haugesund | 2019 |
| Sentrumsparkering AS | Oslo | 1985 |
| Senum Invest AS | Arendal | 2016 |
| Senzie AS | Oslo | 2009 |
| Sertifiseringssenteret AS | Moss | 2026 |
| Service Og Samferdsel Opplæringskontor SA | Gamle Fredrikstad | 2013 |
| Servicesenteret Nord AS | Kvaløya | 2003 |
| Sesåklart AS | Bergen | 2020 |
| Setemiro AS | Stabekk | 2023 |
| Sevekst AS | Oslo | 2021 |
| Seven Ate Nine AS | Hundvåg | 2024 |
| Sexolog Dolonen AS | Ski | 2023 |