| Sjolaskip HF | Oslo | 2006 |
| Sjold AS | Oslo | 2008 |
| Sjursen's Renhold AS | Feøy | 2021 |
| Sjusjøen Renhold AS | Sjusjøen | 2018 |
| Sjåførtjenester Trøndelag Da | Melhus | 2007 |
| Sjø Akva AS | Midsund | 2021 |
| Sjø-Makker AS | Dale I Sunnfjord | 2022 |
| Sjøblom Eiendom AS | Sørstraumen | 2025 |
| Sjøfiske AS | Havøysund | 2012 |
| Sjøgang AS | Ulsteinvik | 2024 |
| Sjøglo AS | Porsgrunn | 2025 |
| Sjøgren Service AS | Hammerfest | 2022 |
| Sjøkanten Service AS | Mandal | 2024 |
| Sjølstad Holding AS | Oslo | 2025 |
| Sjølveste Bjørn Glestad AS | Oslo | 2026 |
| Sjøly Service AS | Trondheim | 2018 |
| Sjøtind Rederi AS | Ålesund | 2021 |
| Sjøvikvass Consulting | Se-610 40 Gustum | 2017 |
| Sjøvold Holding AS | Kongsberg | 2021 |
| SK Bemanning AS | Frogner | 2022 |
| SK Hadeland Da | Jaren | 2024 |
| SK Solutions AS | Brønnøysund | 2025 |
| SK Tak Og Fasadevask AS | Tveit | 2024 |
| SK Teknikk AS | Glesvær | 1996 |
| SK Tjenester AS | Vestmarka | 2021 |
| Sk-Service AS | Oslo | 2014 |
| Sk-Service Oslo AS | Oslo | 2022 |
| Skaalbjorn AS | Tromsø | 1979 |
| Skaar International GmbH | Flaktveit | 2005 |
| Skaar Racing Team AS | Hafslundsøy | 2013 |
| Skaaret Landskap AS | Asker | 1994 |
| Skaathun Holding & Invest AS | Os | 2022 |
| Skadedyr Proffen AS | Fetsund | 2023 |
| Skadedyrbekjemperen AS | Skarnes | 2021 |
| Skadedyrbyraaet Trond Øyvåg AS | Blaker | 2021 |
| Skadedyrkontroll 1 AS | Eydehavn | 2022 |
| Skadedyrkontroll 1, Avd. Vestland AS | Nyborg | 2024 |
| Skadedyrkontrollen Øst AS | Skreia | 2009 |
| Skadedyrservice AS | Ytre Arna | 2024 |
| Skadedyrspesialisten AS | Kirkenær | 2016 |
| Skadeservice Nor 1 AS | Harstad | 2022 |
| Skadi Adventures AS | Tromsdalen | 2018 |
| Skagen Eiendomsdrift AS | Sandnes | 2016 |
| Skagen Eiendomsdrift Haugesund AS | Haugesund | 2017 |
| Skagen Operations AS | Stavanger | 2024 |
| Skagerak Group AS | Skien | 2015 |
| Skagerak Rekruttering AS | Kragerø | 2003 |
| Skagerak Vask Og Maleservice AS | Tjodalyng | 2026 |
| Skagerak Ørret AS | Sannidal | 1982 |
| Skagerrak Arrangement Da | Arendal | 2003 |
| Skagevold Utleie AS | Tovik | 2025 |
| Skagstind Bygg AS | Oslo | 2019 |
| Skagøy AS | Rebbenes | 2013 |
| Skaidi Drift AS | Kvalsund | 2015 |
| Skaila Nuf | Lt-92118 Klaipeda | 2020 |
| Skala Stillas AS | Jar | 1995 |
| Skaldegard AS | Aurland | 2016 |
| Skalleberg Drift AS | Grimstad | 2019 |
| Skandinavisk Bygge Service Aps | Oslo | 2012 |
| Skandinavisk Kompetensservice AB | Se-373 46 Holmsjö | 2012 |
| Skandinavisk Kompetensservice Avd Motor & Mekanik AB | Se-371 50 Karlskrona | 2020 |
| Skandinavisk Kompetensservice Avd Weldtec AB | Se-373 45 Holmsjö | 2025 |
| Skandinavisk Motorsykkel Center AS | Skotterud | 2020 |
| Skandinavisk Rør AS | Høvik | 2013 |
| Skandinavisk Utemiljø AS | Oslo | 2013 |
| Skandinaviske Renhold AS | Kolnes | 2012 |
| Skanpol AS | Drammen | 2026 |
| Skanpol SP. Z.O.O. Nuf | Pl-80577 Gdansk | 2018 |
| Skanska Fastigheter Göteborg AB | 41250 Göteborg | 2012 |
| Skanska Infrastructure Development AB | 112 74 Stockholm | 2015 |
| Skanska OY | Fi-00280 Helsinki | 2020 |
| Skap-Opplevelser AS | Østre Gausdal | 2025 |
| Skapoullispps Limited | Gb-Great Yarmouth Nr30 1Hp | 2019 |
| Skare Invest AS | Sofiemyr | 2023 |
| Skarfjord AS | Rykkinn | 2023 |
| Skarnes Industrilager AS | Snarøya | 1972 |
| Skarnsundet Charter AS | Inderøy | 2008 |
| Skarrud Hytteservice AS | Hønefoss | 2013 |
| Skarsfjord Drift AS | Narvik | 2025 |
| Skarshaug Invest AS | Harøy | 2000 |
| Skarstinden Holding AS | Oslo | 2023 |
| Skarstjønn AS | Rauland | 2020 |
| Skarsvåg Drift AS | Dyrvik | 2016 |
| Skarven Event AS | Røst | 2024 |
| Skatt Og Regnskapsrådgivning AS | Arendal | 2018 |
| Skattejakten AS | Tistedal | 2023 |
| Skattøra Invest AS | Tromsø | 1988 |
| Skaugerud Bygdetjenester AS | Snertingdal | 2022 |
| Skavis AS | Vuku | 2023 |
| Skavl Media AS | Bergen | 2025 |
| Skavli Gård AS | Evenskjer | 2017 |
| Skavlid Consulting & Investments AS | Edland | 2024 |
| Skedsmo Cleanteam AS | Skedsmokorset | 2023 |
| Skei Booking AS | Svingvoll | 2015 |
| Skei Hyttetjeneste AS | Follebu | 2023 |
| Skeie Alpha Flight Equity AS | Oslo | 2020 |
| Skeie Hageglede Og Renhold AS | Stavanger | 2026 |
| Skendo Renhold AS | Fredrikstad | 2010 |
| Sketch Production AS | Oslo | 2013 |
| Ski Golfsimulator AS | Ski | 2021 |