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| Sogn Øyelegesenter AS | Sarpsborg | 2025 |
| Sognafoten AS | Hafslo | 2021 |
| Sogndal Og Leikanger Revmatikarforeining | Sogndal | 1983 |
| Sogndal Tannlegesenter AS | Sogndal | 2023 |
| Sogneprodukt AS | Vik I Sogn | 1973 |
| Sogneprodukt Jobb AS | Vik I Sogn | 2024 |
| Sognsveien Gastroklinikk AS | Oslo | 1999 |
| Soheila Rahman AS | Trondheim | 2021 |
| Sokna Legekontor Da | Sokna | 2020 |
| Sola Legesenter AS | Sola | 2018 |
| Sola Medisinske Senter AS | Sola | 2023 |
| Solamed AS | Kristiansand S | 2014 |
| Soland Holding AS | Stavanger | 2018 |
| Solberg Fysioterapi Og Trening AS | Vågland | 2016 |
| Solberg Legehus AS | Solbergelva | 2015 |
| Solberg Sportsklinikk AS | Solbergelva | 2022 |
| Solbergelva Fysio- Og Manuell Terapi AS | Solbergelva | 2016 |
| Solbergelva Optikk AS | Solbergelva | 2016 |
| Solbergmoen Tannlegesenter AS | Solbergmoen | 2004 |
| Solbergs Terapi Og Kommunikasjons Tjenester AS | Kråkerøy | 2026 |
| Solbrå Medisinske Senter AS | Borgen | 2025 |
| Soldalen Besøksgård AS | Florø | 2017 |
| Solem Helse AS | Drammen | 2024 |
| Solemsli Osteopati AS | Rykkinn | 2024 |
| Solglytt AS | Ottestad | 2005 |
| Solgården Legesenter Da | Kolbotn | 2001 |
| Solgården Tannhelse AS | Kolbotn | 2023 |
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| Solhaug Gård AS | Tromsdalen | 2023 |
| Solhaug Hansen Holding AS | Elverum | 2019 |
| Solheim Omsorg AS | Skjetten | 2026 |
| Solheim Tannlegevakt AS | Bergen | 2020 |
| Solheim Trim & Fysioterapi AS | Lakselv | 2006 |
| Solhøgd AS | Hareid | 2023 |
| Solid Assistanse AS | Buvika | 2022 |
| Solid Familiekompetanse AS | Moss | 2023 |
| Solid HMS Da | Ålgård | 2010 |
| Solid Psykologkompetanse AS | Stavanger | 2012 |
| Solident AS | Bjørkelangen | 1988 |
| Solkysten Tannhelse AS | Langesund | 2004 |
| Sollegene AS | Drammen | 2023 |
| Sollerkvist Capital Management AS | Hyllestad | 2025 |
| Solli DPS AS | Nesttun | 2017 |
| Solli Kiropraktorklinikk AS | Oslo | 2022 |
| Solli Klinikk AS | Jessheim | 1997 |
| Sollitoppen Gård AS | Arendal | 2025 |
| Solmed AS | Stavanger | 2026 |
| Solsiden Legesenter AS | Trondheim | 2024 |
| Solsiden Pt-Senter AS | Kristiansand S | 2007 |
| Solsikken Legepraksis AS | Oslo | 2019 |
| Solsikken Vekst AS | Skien | 2008 |
| Solsletten Sykehjem AS | Laksevåg | 2015 |
| Solstad AS | Bodø | 2026 |
| Solstad Bo- Og Omsorgssenter AS | Røyse | 2012 |
| Solstein AS | Veavågen | 2020 |
| Soltun Besøksgard AS | Garnes | 2022 |
| Solum Fysioterapi Og Akupunktur Da | Skien | 2008 |
| Solumlege AS | Skien | 2026 |
| Solus Ipse AS | Haugesund | 2022 |
| Solvang Helse Og Utvikling AS | Haugesund | 2012 |
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| Solveig AS | Kristiansand S | 2007 |
| Solveig Ask Hansen Fysioterapi AS | Mandal | 2014 |
| Solør Naprapati AS | Flisa | 2018 |
| Solør Tunet Ans | Flisa | 2007 |
| Soløy AS | Oslo | 2026 |
| Soma Naprapatklinikk AS | Oslo | 2022 |
| Somali Consult Da | Oslo | 2006 |
| Somare AS | Bodø | 2019 |
| Somio AS | Oslo | 2025 |
| Son Fysikalske AS | Son | 2023 |
| Son Legekontor Rodegården AS | Son | 2019 |
| Sona Holding AS | Vennesla | 2021 |
| Songdalen Legesenter AS | Nodeland | 2018 |
| Songvaar Vekst AS | Søgne | 1992 |
| Sonoklinikken AS | Bergen | 2012 |
| Sonomed Konradsen AS | Silsand | 2025 |
| Sora-Omsorg AS | Oslo | 2024 |
| Sorgenfri Tannklinikk AS | Oslo | 2016 |
| Sorodi Invest AS | Oslo | 2017 |
| Sorox OY Nuf | Fi-28130 Pori | 2026 |
| Sorrisi AS | Kleppe | 2021 |
| Sortland Arbeidssenter AS | Sortland | 1990 |
| Sortland Barnefysioterapi AS | Sortland | 2022 |
| Sortland Fysioterapi Og Manuell Terapi AS | Sortland | 1985 |
| Sortland Hud Og Fotterapi AS | Sortland | 1998 |
| Sortland Logopedi AS | Sortland | 2025 |
| Sortland Manuellterapi AS | Sortland | 2020 |
| Sos Eye AS | Oslo | 2021 |
| Sos Eye Holding AS | Oslo | 2021 |
| Sos International A/S Nuf | Lysaker | 2019 |
| Soto Esthetique AS | Vettre | 2016 |
| Sotra Hjertesenter AS | Bergen | 2020 |
| Sotra Kiropraktorklinikk AS | Straume | 2013 |
| Sotra Lege- Og Helseservice AS | Knarrevik | 2020 |
| Sotra Røntgeninstitutt AS | Knarrevik | 2025 |
| Sotraspesialistane AS | Straume | 2001 |
| Soulwork AS | Bodø | 2017 |
| South Coast Invest AS | Kristiansand S | 2015 |