| Stake & Grave Service AS | Oslo | 1985 |
| Stakkeland AS | Kvinlog | 2006 |
| Stakkeland Byggtjenester AS | Kvinesdal | 2012 |
| Stakston Bygg AS | Sør-Fron | 2020 |
| Staldvikhøgda Maskinstasjon AS | Skorovatn | 2013 |
| Stalheim Brannvern AS | Vossestrand | 2015 |
| Stalkoncept SP. Z O.O. Sp.K | Pl-37 111 Rakszawa | 2019 |
| Stalmar AS | Kvaløya | 2015 |
| Stamland Betongentreprenør AS | Skien | 2025 |
| Standab AB Nuf | Se-131 31 Nacka | 2024 |
| Standal Bygg AS | Ålesund | 2008 |
| Standard Control Systems Nuf | Ie-D12 Vk38 Dublin12 | 2026 |
| Standard Elektro AS | Kolbotn | 1993 |
| Standard Malerservice AS | Oslo | 2022 |
| Standard Mur Nuf | Fjellstrand | 2023 |
| Standard Rør AS | Oslo | 2020 |
| Standin Og Streve AS | Skjervøy | 2023 |
| Stanel SK Nuf | Sk-08701 Giraltovce | 2022 |
| Stang Anlegg AS | Greåker | 2012 |
| Stang Entreprenør AS | Oslo | 2011 |
| Stang Multiservice AS | Borgenhaugen | 2025 |
| Stangborli Bygg AS | Flekkefjord | 2014 |
| Stange Asfalt AS | Stange | 2019 |
| Stange Elektriske AS | Stange | 1967 |
| Stange Garasjen AS | Ådalsbruk | 2026 |
| Stangeland & Birkeland Holding AS | Sveio | 2019 |
| Stangeland Blåseisolering AS | Holmestrand | 2026 |
| Stangeland Elektro AS | Randaberg | 2020 |
| Stangeland Holding AS | Sola | 2019 |
| Stangeland Maskin AS | Sola | 1984 |
| Stangeland Prosjekt AS | Sola | 2019 |
| Stanghelle Rørleggerfirma AS | Voss | 2009 |
| Stangnes Gruppen AS | Skjetten | 2019 |
| Stani Ireneusz Nuf | Ise | 2008 |
| Stanislaw Kulczynski | Pl-66-4000 Gorzow Wielkopolski | 2011 |
| Stanislaw Nowak Nowak | 84-200 Wejherowo | 2007 |
| Stanjo AS | Randaberg | 2014 |
| Stankus Bygg AS | Dyrvik | 2024 |
| Stanley Bygg AS | Asker | 2017 |
| Stanmar Pphu SC Jerzy Grzegorz | Ul Rafowa | 2010 |
| Stannah AS | Oslo | 1999 |
| Star Bidco AS | Hagan | 2022 |
| Star Elektro AS | Bergen | 2002 |
| Star Malerservice AS | Gjøvik | 2015 |
| Star Refrigeration Limited | Oslo | 2011 |
| Star Rørleggerservice AS | Skjetten | 2020 |
| Starbreather Production AS | Mysen | 2015 |
| Starelement Oü | Ee Mäjamaa Vald Raplamaa 78315 | 2020 |
| Stareng Bygg AS | Årnes | 2025 |
| Starkenberg AS | Sørvågen | 2025 |
| Start Montering AS | Røyse | 2023 |
| Startdo Solution, MB | Lt-84325 Joniskio R. Sav, Zagaré | 2026 |
| Stasj Eiendom AS | Beitstad | 1988 |
| Statbygg AS | Kløfta | 2024 |
| Stathelle Glass-Service AS | Stathelle | 2019 |
| Staticus | Oslo | 2010 |
| Staticus Norge AS | Oslo | 2010 |
| Statikk.No AS | Nesbru | 2017 |
| Stato Bygg AS | Skedsmokorset | 2021 |
| Statom AS | Sandnessjøen | 2005 |
| Status Bygg Norge AS | Finstadjordet | 2009 |
| Statwind AS | Nøtterøy | 2005 |
| Statybos Meistrai | 5408 Siauliai | 2012 |
| Statybu Archeologija Nuf | Lt-94107 Klaipeda | 2019 |
| Statybu Parkas MB | Lt-96144 Klaipedos R | 2014 |
| Staurbakk AS | Bodø | 2017 |
| Stauri AS | Stryn | 2023 |
| Stausland Holding AS | Tvedestrand | 2022 |
| Staut Entreprenør AS | Lillestrøm | 2018 |
| Stav Og Laft AS | Gol | 2023 |
| Stavadalen Holding AS | Reinli | 2005 |
| Stavanger Blikk AS | Stavanger | 2026 |
| Stavanger Bygg & Rehabilitering AS | Stavanger | 2026 |
| Stavanger Elektriske AS | Stavanger | 2013 |
| Stavanger Elektro AS | Stavanger | 2016 |
| Stavanger Entreprise AS | Stavanger | 2012 |
| Stavanger Industribelegg AS | Sandnes | 2001 |
| Stavanger Installasjon AS | Stavanger | 1989 |
| Stavanger Installasjon Automasjon AS | Stavanger | 1999 |
| Stavanger Klima AS | Sandnes | 2003 |
| Stavanger Klima Holding AS | Sandnes | 2024 |
| Stavanger Malingstjenester AS | Kleppe | 2023 |
| Stavanger Maskin AS | Hundvåg | 2017 |
| Stavanger Rør Teknikk AS | Hundvåg | 2023 |
| Stavanger Rørhandel AS | Oslo | 2005 |
| Stavanger Rørlegger Service AS | Stavanger | 2021 |
| Stavanger Varmesenter AS | Stavanger | 2006 |
| Stavanger VVS AS | Stavanger | 1980 |
| Stavangerhytten AS | Stavanger | 2012 |
| Stavangerrevhab AS | Stavanger | 2025 |
| Stavdal Maskin AS | Skien | 2021 |
| Stave Mur AS | Ålesund | 2000 |
| Staven AS | Åfjord | 2026 |
| Stavern Elektroprosjektering AS | Stavern | 2026 |
| Stavern Vvs&Vedlikehold AS | Stavern | 2025 |
| Stavesvingen Røyr Og Flis AS | Flåm | 2014 |
| Stavnem & Vigrestad AS | Vigrestad | 1998 |
| Stavnem & Vigrestad Eiendom AS | Vigrestad | 1990 |
| Stavnesli Bygg Og Eiendom AS | Trondheim | 2019 |
| Stavrum AS | Hell | 2015 |