| Runing AS | Agriculture & fishing | 1999 |
| Runless AS | Information & communication | 2026 |
| Ruudvegen 37 AS | Real estate | 2012 |
| Ruva Solutions AS | Construction | 2024 |
| Ruve AS | Professional & scientific | 2015 |
| RVG Handel AS | Wholesale & retail | 2014 |
| Rydd Reolsystem AS | Wholesale & retail | 2002 |
| Ryst AS | | 2022 |
| Rås AS | Professional & scientific | 2023 |
| Rødal Regnskap AS | Professional & scientific | 2016 |
| Rødalsgården AS | Real estate | 2021 |
| Rødkobbe AS | Financial services | 2018 |
| Rødset Invest AS | | 2026 |
| Rødseth Invest AS | Real estate | 2008 |
| Rødstøl Eiendom AS | Real estate | 2026 |
| Røen Holding AS | Real estate | 2023 |
| Rønneberg Auto Industri AS | Wholesale & retail | 1999 |
| Rønnestad Holding AS | Construction | 2022 |
| Rør 1 AS | Construction | 2010 |
| Rør 24 AS | Construction | 2018 |
| Rør 24 Eiendom AS | Real estate | 2016 |
| Rørlegger Rune Flem AS | Construction | 2015 |
| RØRLEGGER365 AS | Construction | 2020 |
| Rørleggermester Trond E. Madsen AS | Construction | 2005 |
| Rørtek AS | Manufacturing | 1988 |
| Rørtek Eiendom AS | Real estate | 2021 |
| Røsslyngvegen 16 AS | Real estate | 2021 |
| Røsvik Holding AS | | 2020 |
| Røtet Eiendom AS | Real estate | 2008 |
| Røyken Livsynshumanistiske Ungdomsskole AS | Education | 2025 |
| Røynd Technologies AS | Professional & scientific | 2024 |
| Røysegata 15 Da | Real estate | 2009 |
| Røyskatt Holding AS | Real estate | 2017 |
| S a Tollås AS | Professional & scientific | 1974 |
| S Ruud Holding AS | | 2023 |
| S Øye Holding AS | | 2025 |
| S. Strand Holding AS | | 2021 |
| S.E Eiendom AS | Real estate | 2013 |
| S.E.K Holding AS | Wholesale & retail | 2020 |
| S.I.K.T. Holding AS | | 2025 |
| S.I.K.T. Trafikkskole AS | Education | 2025 |
| S.Stokkevaag Invest AS | Financial services | 2018 |
| S10R Invest AS | Real estate | 2025 |
| Sabrura Moa AS | Hospitality | 2018 |
| Sacalobra Invest AS | Financial services | 2016 |
| Saf Invest II AS | Transport & logistics | 2019 |
| Safari Planter AS | Administrative & support | 1990 |
| Safecar AS | Wholesale & retail | 2026 |
| Safecrowd AS | Arts & recreation | 2022 |
| Saga Seafood AS | Wholesale & retail | 2004 |
| Saga Seafood Eiendom AS | Real estate | 2016 |
| Sak Invest AS | Real estate | 2009 |
| Sakari AS | | 2025 |
| Sal Maskin Og Transport AS | Transport & logistics | 2008 |
| Salacia AS | | 2020 |
| Salind Holding AS | Arts & recreation | 2025 |
| Salmon Cosmetics AS | Professional & scientific | 2018 |
| Salmon Evolution Sales AS | Wholesale & retail | 2022 |
| Salmoserve AS | Professional & scientific | 2016 |
| Salong Løv AS | Other services | 2007 |
| Salong Mari Hudpleie Og Fysioterapi AS | Other services | 2023 |
| Salong No 1 AS | Other services | 2018 |
| Salong:Solo AS | Other services | 2025 |
| Salt Digital AS | Professional & scientific | 2021 |
| Saltlageret Kaidrift AS | Real estate | 2019 |
| Saltlagerveien 10 AS | Real estate | 2016 |
| Saltskaar & Berget AS | Information & communication | 2026 |
| Samvel AS | Real estate | 2018 |
| Samvel Holding AS | Real estate | 2019 |
| Sandal Elektroverksted AS | Wholesale & retail | 2014 |
| Sandal Parkdrift AS | Administrative & support | 2009 |
| Sandbakk & Pettersen Arkitekter AS | Professional & scientific | 1993 |
| Sandberg Montasjeservice Og Snekkeri AS | Construction | 2020 |
| Sandborgbryggen AS | Real estate | 2009 |
| Sandnes Consulting AS | Professional & scientific | 1995 |
| Sandnes Operations AS | Wholesale & retail | 2025 |
| Sandra Invest AS | Financial services | 2005 |
| Sandseb AS | Wholesale & retail | 2017 |
| Sandsøya Eiendom AS | Real estate | 2023 |
| Sandvikane Utvikling AS | Real estate | 2024 |
| Sandø AS | | 2024 |
| Sandø Invest AS | | 2023 |
| Sandøy Supply AS | Transport & logistics | 2009 |
| Sanero AS | Construction | 2025 |
| Sangwan Invest AS | | 2019 |
| Saninstal AS | Construction | 2017 |
| Sankt Olavs Plass 3 AS | Real estate | 2012 |
| Sankten Holding AS | Real estate | 1998 |
| Sant Invest AS | | 2024 |
| Sant Invest Holding AS | | 2025 |
| Sarah Jøsok AS | Wholesale & retail | 2025 |
| Saure Invest AS | | 2022 |
| Saving Angels AS | Professional & scientific | 2026 |
| Savoi AS | Real estate | 2022 |
| SB Utleie AS | Administrative & support | 1984 |
| SBG 7 Drift AS | Hospitality | 2018 |
| Scala Industrivekter AS | Wholesale & retail | 2003 |
| Scala Norway AS | Manufacturing | 2017 |
| Scan Asian Shop AS | Wholesale & retail | 2016 |
| Scan Asianshop Kremmergården AS | Wholesale & retail | 2025 |