| Scandinavian Health System AS | Drammen | 2022 |
| Scandinavian Laparoscopic Sugary | Se-436 43 Askim | 2016 |
| Scandinavian Vision Science and Technology AS | Arendal | 2011 |
| Scandoimed AS | Sellebakk | 2022 |
| Scansyn AB | 75320 Uppsala | 2007 |
| Scenario Beredskap AS | Stjørdal | 2021 |
| Scenekunstklinikken AS | Bergen | 2022 |
| Scheel Holding AS | Kristiansand S | 2024 |
| Schille Helsetenester AS | Haugesund | 2013 |
| Schille Turid Tannlege AS | Sarpsborg | 1996 |
| Schiøtt Haakonsen AS | Oslo | 2017 |
| Schjelberg Helse AS | Tromsdalen | 2022 |
| Schjelderup Dental AS | Asker | 2021 |
| Schjelderup Kleppe Medical Holding AS | Kleppe | 2023 |
| Schjelderup-Kjeldsberg AS | Tromsdalen | 2022 |
| Schneid Care AS | Oslo | 2023 |
| Schneiders AS | Oslo | 2020 |
| Schnell Tannhelse AS | Ål | 2026 |
| Scholz Medical AS | Stabekk | 2016 |
| Schous Fysioterapi AS | Oslo | 2015 |
| Schouslegene Da | Oslo | 2009 |
| Schrøder Fysioterapi AS | Trondheim | 2019 |
| Schulz & Schulz Allmennlege AS | Foldfjorden | 2012 |
| Sciæra AS | Åsgreina | 2022 |
| Scophelp AS | Moss | 2018 |
| Scorpion AS | Trondheim | 2000 |
| Screencancer AS | Sola | 2009 |
| Sculpted by Sash AS | Oslo | 2025 |
| SE - Hun Snakker AS | Sørreisa | 2017 |
| Sea Aesthetics AS | Oslo | 2023 |
| Sea Capital AS | Oslo | 2023 |
| Sea Medic AS | Lærdal | 2020 |
| Sebastian Conrad Fysioterapi AS | Harstad | 2026 |
| Sebra Øyeklinikk AS | Hønefoss | 2025 |
| Second Opinions AS | Trondheim | 2023 |
| See AS | Sandvika | 2015 |
| Segwell AS | Stavanger | 2014 |
| Sehat Labs Aps | Dk-5230 Odense M | 2023 |
| Seim Family AS | Geilo | 2016 |
| Seim Fysikalske AS | Seim | 1994 |
| Seim Helsetjenester AS | Rissa | 2018 |
| Seimprocedure AS | Bergen | 2025 |
| Sekoya AS | Oslo | 2021 |
| Selbak Tannlegesenter AS | Sellebakk | 2013 |
| Select Care AS | Stokke | 2013 |
| Self Care Clinic AS | Trondheim | 2023 |
| Selivanova Consulting AS | Oslo | 2012 |
| Sellebakk Legekontor AS | Sellebakk | 2022 |
| Selli Rehabiliteringssenter AS | Klæbu | 1986 |
| Selliseth Drift AS | Ålesund | 2018 |
| Selsaas Holding AS | Karmsund | 2018 |
| Selskap B AS | Oslo | 2024 |
| Selwåg Investments AS | Namsos | 2021 |
| Sem Fysioterapi AS | Sem | 2026 |
| Semaro Holding AS | Fevik | 2020 |
| Semifreddo AS | Oslo | 2021 |
| Semira Tomas AS | Oslo | 2024 |
| Semje AS | Onarheim | 2020 |
| Semsel AS | Trondheim | 2018 |
| Semsel Holding AS | Trondheim | 2007 |
| Semya Kapital AS | Ottestad | 2019 |
| Semyamed AS | Ottestad | 2019 |
| Seniorsupport AS | Oslo | 2022 |
| Senja Fysioterapi AS | Finnsnes | 2024 |
| Senja Helse Og Omsorg AS | Silsand | 2014 |
| Senja Øyehelse AS | Finnsnes | 2023 |
| Sens Arbeidsinkludering AS | Oslo | 2017 |
| Sense Psykologi Og Konsulenttjenester AS | Bergen | 2014 |
| Sensibilia AS | Kyrksæterøra | 2017 |
| Sensible AS | Oslo | 2022 |
| Senter for Arbeidslivsforberedelse Alf AS | Bergen | 1999 |
| Senter for Brystrekonstruksjon AS | Blommenholm | 2010 |
| Senter for HR & HMS Ledelse AS | Geilo | 2017 |
| Senter for Klassisk Homeopati Da | Bergen | 2019 |
| Senter for Krisepsykologi Trondheim Ans | Trondheim | 2000 |
| Senter for Livshjelp AS | Skreia | 1991 |
| Senter for Livsmestring AS | Knarrevik | 2024 |
| Senter for Migrasjonshelse Oslo AS | Oslo | 2009 |
| Senter for Personlig Utvikling AS | Bergen | 2022 |
| Senter for Regenerativ Medisin AS | Oslo | 2024 |
| Senter for Stress Og Traumepsykologi AS | Oslo | 1999 |
| Senter for Tilpasset Opplæring AS | Stavanger | 2011 |
| Senter for Værekraft Da | Nittedal | 2025 |
| Senterklinikken AS | Sandvika | 2007 |
| Senterlegene Da | Ulset | 2023 |
| Sentral Helse AS | Oslo | 2024 |
| Sentralstasjonen Fysioterapi Og Manuellterapi AS | Oslo | 1983 |
| Sentrum Dental Ans | Bergen | 2006 |
| Sentrum Din Fastlege AS | Elverum | 2021 |
| Sentrum Fysioterapi & Helse AS | Kirkenes | 2024 |
| Sentrum Fysioterapi Ans | Hønefoss | 1986 |
| Sentrum Fysioterapi Bodø AS | Bodø | 2014 |
| Sentrum Fysioterapi Og Trening AS | Lillehammer | 2019 |
| Sentrum Fysioterapi Voss AS | Voss | 2018 |
| Sentrum Gynekologi AS | Trondheim | 2024 |
| Sentrum Gynekologi Drift AS | Trondheim | 2025 |
| Sentrum Helsetjenester AS | Oslo | 2024 |
| Sentrum Hjerteklinikk AS | Verdal | 2026 |
| Sentrum Kiropraktorklinikk Heimdal AS | Heimdal | 2012 |
| Sentrum Ledd Og Muskelklinikk AS | Drammen | 1999 |