| Staal Direktesalg Ans | Langhus | 1997 |
| Staale Nyhus AS | Sør-Fron | 1997 |
| Stack Ehf. Nuf | Is-105 Reykjavik | 2025 |
| Stadsvik Brygger AS | Dolmøy | 2022 |
| Stadt Group AS | Gjerdsvika | 1999 |
| Stadt Maskinutleige AS | Stadlandet | 2016 |
| Staff on AS | Saksvik | 2022 |
| Staff Resources Group Norway AS | Leknes | 2025 |
| Staffers Event AS | Oslo | 2020 |
| Staffex AS | Sandefjord | 2024 |
| Staffio AS | Trondheim | 2022 |
| Staffservice AS | Oslo | 2022 |
| Stafne Stillasutleie AS | Bjerkvik | 2012 |
| Stag AS | Tjøme | 2016 |
| Stag Vedlikehold AS | Tjøme | 2019 |
| Stage AS | Skien | 2017 |
| Stage Event AS | Søgne | 2020 |
| Stakehouse Holding AS | Jakobsli | 2024 |
| Stakvik Invest AS | Longyearbyen | 2021 |
| Staldmæglerne | Dk-6650 Brørup | 2020 |
| Stall Robmarker Internasjonal Da | Råde | 1997 |
| Stalleland Invest AS | Grimstad | 2005 |
| Stamsund Auto AS | Stamsund | 2013 |
| Stand-Up Tromsø Da | Tromsø | 2024 |
| Standard Garanti Forsikring AS | Asker | 2016 |
| Standby AS | Oslo | 2025 |
| Standesign | Dk-5800 Nyborg | 2024 |
| Standin AS | Sandnes | 2013 |
| Standup Stavanger AS | Stavanger | 2025 |
| Stangeland Bustadlag SA | Stolmen | 2005 |
| Stangeland Gruppen AS | Sola | 1984 |
| Stanton Chase Norway AS | Oslo | 2012 |
| Stao No Pao AS | Notodden | 2014 |
| Stapleton International Limited | Darlington Dl3 7Sf England | 2010 |
| Star Bilutleie AS | Lyngdal | 2025 |
| Star Marine SP. Z.O.O. | Pl-80-755 Gdansk | 2019 |
| Star Oil Gas Power Nord GmbH | De-21079 Hamburg | 2016 |
| Star People Partner Sweden AB Nuf | Se-114 46 Stockholm | 2026 |
| Star Renhold AS | Elverum | 2025 |
| Starag Invest AS | Stavanger | 2005 |
| Staras AS | Oslo | 2000 |
| Stark Engineering Oü | 10133 Harju County | 2017 |
| Starlease AS | Skien | 2019 |
| Starline AS | Bergen | 1994 |
| Starline Holding AS | Bergen | 2005 |
| Starnav Ltd | Bg-8000 Burgas | 2019 |
| Staro Bil AS | Nyborg | 2025 |
| Starsa AS | Bodø | 2019 |
| Start 9 AS | Bodø | 2016 |
| Start Invest AS | Neverdal | 2013 |
| Start Leasing AS | Oslo | 2015 |
| Start Medical AS | Oslo | 2020 |
| Start of Authority 04 Ltd Nuf | N146Qh, London, Southgate | 2007 |
| Startvogna AS | Oslo | 2024 |
| Starvin Marvin AS | Sandefjord | 2020 |
| Staselig AS | Spydeberg | 2026 |
| Stasjonsdrift Mangla AS | Moelv | 2018 |
| Stasysrent AS | Stavanger | 2026 |
| Stat Marine Limited | Middlesex Ha2 7St England | 2010 |
| Stationmar AS | Kristiansand S | 2018 |
| Statistical Consulting Services LLC | Vikersund | 2012 |
| Statkraft Germany GmbH | De-40476 Düsseldorf | 2025 |
| Statkraft Peru S.A. | Oslo | 2017 |
| Statkraft UK Ltd | London Ec2N 4Bq | 2017 |
| Status Eiendom AS | Eydehavn | 2020 |
| Stavanes Multi Service AS | Eidfjord | 2025 |
| Stavanger Bemanning AS | Tananger | 2022 |
| Stavanger Brøyting AS | Stavanger | 2024 |
| Stavanger Forum AS | Stavanger | 1999 |
| Stavanger Glød AS | Stavanger | 2023 |
| Stavanger Hageservice AS | Hafrsfjord | 2014 |
| Stavanger Hus Og Hage AS | Hundvåg | 2017 |
| Stavanger Industri Service Utleie AS | Stavanger | 2016 |
| Stavanger Kickoff AS | Sandnes | 2012 |
| Stavanger Marine AS | Hundvåg | 2002 |
| Stavanger Partyutleie AS | Oslo | 2018 |
| Stavanger Renholdsbyrå AS | Stavanger | 2015 |
| Stavanger Service AS | Stavanger | 2011 |
| Stavanger Vaktmesterservice AS | Stavanger | 2025 |
| Stavanger Vask AS | Hafrsfjord | 2026 |
| Stavanger Well Services AS | Tananger | 2012 |
| Stave Eiendom Røssevika AS | Farsund | 2021 |
| Stavern Regnskap AS | Stavern | 2026 |
| Stavernopplevelser AS | Stavern | 2022 |
| Stavnes Servicetjenester Nuf | Bodø | 2018 |
| Stavsplassen SA | Tretten | 1997 |
| Steam Tours AS | Kvaløya | 2024 |
| Steamvask Ans | Sæbøvågen | 2002 |
| Steco Utleie AS | Drammen | 2001 |
| Steddi Payments AS | Fyllingsdalen | 2020 |
| Steddy AS | Oslo | 2022 |
| Steen Aviation AS | Sandefjord | 2022 |
| Steen Konsern AS | Sandefjord | 2022 |
| Steen Mevold Invest AS | Oslo | 2020 |
| Steffensens Invest AS | Flatanger | 2018 |
| Steg II AS | Hvalstad | 2019 |
| Stegane Sport AS | Prestfoss | 2012 |
| Stegglia Veilag SA | Rennebu | 1997 |
| Steigen Mountain Guides AS | Leinesfjord | 2021 |
| Steigen Renhold AS | Nordfold | 2025 |