| Sharifs AS | Drammen | 2022 |
| Sharp Barbers AS | Oslo | 2026 |
| Sheilas Beauty AS | Høvik | 2025 |
| Shekhy AS | Sandnes | 2021 |
| Shero Barber King AS | Bergen | 2024 |
| Shift Electric Mobility Norway AS | Oslo | 2020 |
| Shikau Afro Frisør Salong AS | Hamar | 2023 |
| Shine AS | Oslo | 2020 |
| Shine Bilvask Og Bilpleie AS | Årnes | 2016 |
| Shine Clinic AS | Drammen | 2020 |
| Shine Studio AS | Svelgen | 2026 |
| Shinefactory AS | Drammen | 2017 |
| Shineup KG AS | Sandvika | 2025 |
| Shiny Bil & Båtpleie AS | Sundebru | 2017 |
| Shirin's Hårstudio AS | Elverum | 2026 |
| Shiyar Frisør AS | Horten | 2022 |
| Shlers Beauty Salong AS | Arendal | 2020 |
| Shna AS | Sarpsborg | 2013 |
| Shortcut Holding AS | Ask | 2005 |
| Shortcuts AS | Oslo | 2023 |
| Showpi Studio AS | Drammen | 2026 |
| SHR Autoservice AS | Mauseidvåg | 2017 |
| SHS Bilpleie AS | Spikkestad | 2023 |
| Si Service AS | Ål | 2007 |
| Si-Ko AS | Fredrikstad | 2019 |
| Si-Sa Holding AS | Brumunddal | 2021 |
| Sidd AS | Stavanger | 2017 |
| Sido Skredder AS | Drøbak | 2021 |
| Siesta Solstudio AS | Trondheim | 2002 |
| Sifi Holding AS | Leira I Valdres | 2011 |
| Sigdal Bil & Landbruk AS | Solumsmoen | 2023 |
| Sigdal Bilservice Da | Prestfoss | 2010 |
| Sigdal Rep Og Utleie AS | Prestfoss | 2021 |
| Sigerfjord Dekk & Service AS | Sortland | 2024 |
| Siggerud Sauna AS | Siggerud | 2026 |
| Siggerudveien Bilverksted AS | Siggerud | 1982 |
| Sigmund Aasen AS | Arendal | 1969 |
| Signatur Frisør AS | Haugesund | 2018 |
| Signatur Vika AS | Kvaløya | 2020 |
| Signature Nails & Spa AS | Oslo | 2019 |
| Signatures Nails & Spa by Zarri AS | Strømmen | 2026 |
| Signaturklinikken AS | Lillestrøm | 2015 |
| Signaturklinikken Bekkestua AS | Bekkestua | 2020 |
| Signaturklinikken Eiendom RH AS | Bekkestua | 2022 |
| Signaturklinikken Holding AS | Strømmen | 2018 |
| Signaturklinikken Oslobukta AS | Oslo | 2020 |
| Signaturklinikken Strømmen AS | Strømmen | 2018 |
| Sigurd Elholm Barber-Frisør AS | Bergen | 2007 |
| Sigvaldsens Solstudio AS | Alta | 1999 |
| Silhuett Frisør Ans | Froland | 2000 |
| Silhuett Frisør Froland AS | Froland | 2025 |
| Silje Håbrekke AS | Norheimsund | 2016 |
| Silje Invest AS | Oslo | 2016 |
| Silje S Hud Og Velvære AS | Skånevik | 2018 |
| Siljes Hundelufting AS | Haslum | 2013 |
| Siljes Sax AS | Dokka | 2019 |
| Silke's Velvære AS | Molde | 2014 |
| Silkehud AS | Stavanger | 2024 |
| Sillage AS | Sandnes | 2025 |
| Sillongen Helse Og Kurshotell Ans | Bøverbru | 2024 |
| Silsand Auto AS | Silsand | 1994 |
| Silsand Renhold AS | Silsand | 2014 |
| Silver Dog . AS | Berg I Østfold | 2026 |
| Simco AS | Råde | 1990 |
| Simech AS | Gjerstad | 2024 |
| Simen Finjord AS | Alta | 2025 |
| Simge AS | Oslo | 2024 |
| Simonsen Begravelsesbyrå AS | Stamsund | 2015 |
| Simonsen Motor AS | Sørreisa | 2023 |
| Simore AS | Bønes | 2025 |
| Sindre Trøen AS | Mogreina | 2014 |
| Singh Dekk & Autoservice AS | Lierstranda | 2024 |
| SINGLE4YOU Da | Notodden | 2004 |
| Sinsen Hårdesign AS | Oslo | 1939 |
| Sirdal Bilverksted AS | Tonstad | 2002 |
| Sirdalsmat SA | Tonstad | 2013 |
| Siren Holding AS | Molde | 2018 |
| Siri Engvoll AS | Tromsø | 2016 |
| Siri M. Hårstudio AS | Skjold | 2019 |
| Siri Og Therese AS | Oslo | 2014 |
| Siri Thaimassasje Og Spa AS | Drammen | 2025 |
| Siri's Salong AS | Støren | 2015 |
| Sirius Sogn AS | Kaupanger | 2008 |
| Sirkel Selvvask AS | Torp | 2013 |
| Sirkulasjonsklinikken AS | Frosta | 2022 |
| Sirkulær Ombruk AS | Langhus | 2024 |
| Sissel Grana AS | Tolvsrød | 2008 |
| Sissel Og Arnes Klippoteque Ans | Løten | 1989 |
| Sissels Hudpleie AS | Nøtterøy | 2012 |
| Sissels Hundeklipperi AS | Bodø | 2023 |
| Sissels Veiledning AS | Hønefoss | 2025 |
| Siste Spor AS | Ler | 2026 |
| Sistranda Bil Og Dekkservice AS | Sistranda | 2020 |
| Sithpa AS | Kristiansand S | 2024 |
| Sittogbli AS | Kråkstad | 2007 |
| Siv Myhre Invest AS | Lørenskog | 2022 |
| Siv's Hårstudio AS | Gjøvik | 2014 |
| Sivan Frisør AS | Porsgrunn | 2016 |
| Sizar AS | Oslo | 2018 |
| SJ Drift AS | Rørvik | 2013 |