| Stensby Helse AS | Lillehammer | 2023 |
| Stensnes Fysioterapi Da | Bergen | 2023 |
| Stensparken Medisinske Senter AS | Oslo | 2011 |
| Stepbystep AS | Kristiansand S | 2025 |
| Stepup Da | Oslo | 2015 |
| Sterk Group AS | Oslo | 2021 |
| Sterk Helse AS | Oslo | 2019 |
| Sterk Helse Og Trening Løren AS | Oslo | 2012 |
| Sterk Helse Og Trening Nydalen AS | Oslo | 2024 |
| Sterk Kropp AS | Tønsberg | 2020 |
| Sterkpappa AS | Sandefjord | 2025 |
| Sternow AS | Oslo | 2004 |
| Stetoskopet Helsetjenester AS | Arendal | 2022 |
| Stevik Kløve AS | Tiller | 2022 |
| Stevnelegene Da | Lørenskog | 2012 |
| Stewarts Fysioterapi & Treningssenter AS | Sundebru | 2022 |
| Stewi Invest AS | Oslo | 2022 |
| Stho Holding AS | Porsgrunn | 2019 |
| Sti Omsorg AS | Venabygd | 2018 |
| Stian Halse AS | Oslo | 2022 |
| Stian Solli Kanestrøm AS | Snarøya | 2012 |
| Stian Sund Fysioterapi AS | Etne | 2024 |
| Stig Kolbjørnsen Consulting AS | Brevik | 2015 |
| Stikk Innom Hos Berit - Akupunktur Og Medisinsk Yoga AS | Skedsmokorset | 2013 |
| Stille Stund AS | Fagerstrand | 2024 |
| Stilmed AS | Fredrikstad | 2023 |
| Stine Yk Legetjenester AS | Tiller | 2026 |
| Stip Holding AS | Trondheim | 2024 |
| Stjedne I Vest AS | Skudeneshavn | 2025 |
| Stjørdal Legesenter AS | Stjørdal | 2005 |
| Stjørdal Tannhelsesenter AS | Stjørdal | 2008 |
| Stjørdal Øye AS | Stjørdal | 2026 |
| Stoa Idrettsmedisin & Opptrening AS | Arendal | 2014 |
| Stoa Legekontor AS | Arendal | 2005 |
| Stoffskiftemetoden | Oslo | 2016 |
| Stoic Invest AS | Oslo | 2023 |
| Stoicus AS | Oslo | 2005 |
| Stokka Fysioterapi Og Mensendieck Da | Stavanger | 2016 |
| Stokka Legesenter Da | Stavanger | 1992 |
| Stokke Fysioterapi Solberg Og Hansen AS | Stokke | 2024 |
| Stokke Legesenter Da | Stokke | 2022 |
| Stokmoen Fysioterapi Da | Stjørdal | 2002 |
| Stol På Tuva AS | Moss | 2025 |
| Stolpe AS | Kongsvinger | 2005 |
| Stolpehuset Terapirom AS | Bergen | 2023 |
| Stolt Naprapatklinikk AS | Oslo | 2013 |
| Stolten Consulting AS | Son | 2016 |
| Stomatic AS | Oslo | 2015 |
| Stomatologica AS | Gressvik | 2019 |
| Stor-Elvdal Rendalen Produkter AS | Koppang | 1992 |
| Storaunet Helsetjenester AS | Oslo | 2023 |
| Storbyen Legesenter AS | Sarpsborg | 2000 |
| Stord Legesenter AS | Stord | 2014 |
| Stord Tannregulering AS | Stord | 2024 |
| Stord-Fysioterapi AS | Stord | 2022 |
| Store Og Små AS | Oslo | 2018 |
| Storgata Legesenter Lillestrøm AS | Lillestrøm | 2020 |
| Storgaten Fysioterapi Da | Gjøvik | 1998 |
| Storgt. Fysioterapi AS | Stranda | 2011 |
| Storhamar Legesenter AS | Hamar | 2022 |
| Storhaug Legesenter Da | Stavanger | 2004 |
| Storhaug Tannlegesenter AS | Stavanger | 2023 |
| Storheil AS | Bodø | 2018 |
| Storli Invest AS | Overhalla | 2011 |
| Storm Legegruppe AS | Oslo | 2005 |
| Stormoen Invest AS | Nesbru | 2025 |
| Storo Og Nydalen Mensendieck- Fysioterapi AS | Oslo | 1991 |
| Storo Storsenter Tannklinikk AS | Oslo | 2020 |
| Storoklinikken Da | Oslo | 2005 |
| Storsenteret Legekontor Da | Ski | 2015 |
| Stortingsgaten Bedriftshelsetjeneste AS | Oslo | 1999 |
| Stortingsklinikken AS | Drammen | 2023 |
| Stortingsklinikken Offentlig AS | Drammen | 2022 |
| Stortorget Legesenter Da | Hamar | 2012 |
| Stortorget Øre Nese Hals AS | Hamar | 2021 |
| Stortorvet Tannhelsesenter AS | Oslo | 2021 |
| Storvand Fysioterapi Og Trening AS | Bergen | 2023 |
| Storvand Scandinavia AS | Porsgrunn | 1984 |
| Storvoll Psykologpraksis AS | Sandane | 2025 |
| Stovner Eldresenter SA | Oslo | 1988 |
| Stovner Legesenter AS | Oslo | 2003 |
| Stovner Legesenter Service AS | Oslo | 2013 |
| Stovner Tannlegesenter Da | Oslo | 2005 |
| Stovner Tiltaksbolig AS | Oslo | 2025 |
| Strand Manuellterapi AS | Tromsø | 2013 |
| Strand Nilsen Kiropraktikk AS | Gjøvik | 2023 |
| Stranda Tannlege AS | Stranda | 2025 |
| Stranda Tannlegesenter AS | Stranda | 2022 |
| Strandconsulting AS | Os | 2018 |
| Strandgaten Fysioterapi AS | Bergen | 2006 |
| Strandsiden Legesenter AS | Bergen | 2021 |
| Strandtorget Tannklinikk AS | Tromsø | 2019 |
| Strandvik Barnehage AS | Strandvik | 2026 |
| Stranna Rehabilitering AS | Drangedal | 2014 |
| Straume Fysioterapi Da | Straume | 2021 |
| Straume Legesenter AS | Straume | 2009 |
| Straumholm AS | Gjettum | 2024 |
| Straumtest AS | Bodø | 2023 |
| Strax Gladlax AS | Tromsø | 2020 |
| Strendo Klinikken AS | Ål | 2024 |