| Rubens Holding AS | Real estate | 2022 |
| Ruijan Kaiku AS | Information & communication | 2009 |
| Rurveien 3 AS | Real estate | 2023 |
| Rurveien 5 AS | Real estate | 2023 |
| Rushfeldt Holding & Invest AS | Wholesale & retail | 2022 |
| Ryt Holding AS | Construction | 2006 |
| RZ Multi AS | Construction | 2024 |
| Rån Fisk AS | Agriculture & fishing | 2018 |
| Røe Og Thorsen Bygg Ans | Construction | 1994 |
| Røkenes AS | Manufacturing | 1993 |
| Røkenes Eiendom AS | Manufacturing | 2017 |
| Rønqvist Holding AS | Wholesale & retail | 2000 |
| Rør & Bygg Service AS | Construction | 2026 |
| Rør Og Bad AS | Construction | 2006 |
| Rørentreprenør Dan Berg AS | Construction | 2020 |
| Rørlegger Michael Olsen AS | Construction | 2020 |
| Rørleggermester Rolf Olsen AS | Construction | 2021 |
| S Flage Holding AS | | 2024 |
| S Mikkelsen Holding AS | | 2025 |
| S-R Invest AS | Real estate | 2013 |
| S. Thomassen Invest AS | | 2021 |
| S.Danielsen Holding AS | | 2022 |
| S.Heitmann Holding AS | Real estate | 2016 |
| S.O.R. Holding AS | | 2019 |
| S.Parken Holding AS | | 2024 |
| S.R Holding AS | | 2025 |
| S.Rasmussen Invest AS | | 2024 |
| Safework Solutions AS | Health & social care | 2025 |
| Saga Drift AS | Real estate | 2023 |
| Saga Holding & Invest AS | Construction | 2015 |
| Saga Solution AS | Construction | 2018 |
| Sagadrift Holding AS | Real estate | 2024 |
| Sagali Holding AS | | 2021 |
| Saganord AS | Construction | 2012 |
| Sagelv Holding AS | Professional & scientific | 2023 |
| Sagelv Rådgivning & Kompetanse AS | Professional & scientific | 2023 |
| Sakrum Eiendom AS | Real estate | 2011 |
| Saks Kompaniet AS | Other services | 2023 |
| Sam Booking AS | Information & communication | 2015 |
| Sam Bygg AS | Construction | 2025 |
| Sami Siida AS | Arts & recreation | 2002 |
| Sami Siida Eiendom AS | Real estate | 2019 |
| Samuel Bårdsen AS | Construction | 2021 |
| Sandsletten AS | Real estate | 1992 |
| Sans Interiørarkitektur AS | Professional & scientific | 2025 |
| Sansen Invest AS | Financial services | 2020 |
| Sar Utleie AS | Administrative & support | 2023 |
| Saraset AS | Agriculture & fishing | 2025 |
| Sarilla Import Ans | Wholesale & retail | 1988 |
| Sars Holding AS | | 2024 |
| Sarves AS | Real estate | 2003 |
| Sarves Drift AS | Real estate | 2005 |
| Sarvesalta Alpinsenter AS | Arts & recreation | 2012 |
| Sattu AS | Construction | 2016 |
| Sawatdee AS | Wholesale & retail | 2026 |
| SB2 Eiendom AS | Real estate | 2007 |
| SB2 Industri AS | Real estate | 2013 |
| SB2 Utvikling AS | Construction | 2007 |
| SBS Eiendom AS | Real estate | 2016 |
| SD Holding AS | Wholesale & retail | 2005 |
| Sea Inspiration AS | Agriculture & fishing | 2017 |
| Seaqloud AS | Information & communication | 2016 |
| Seljeseth Holding AS | Wholesale & retail | 2007 |
| Sentrum Blomster Alta AS | Wholesale & retail | 2002 |
| Sentrum Boligfellesskap AS | Real estate | 2021 |
| Sentrum Næringsfelleskap AS | Real estate | 2021 |
| Sentrum Tannklinikk Alta AS | Health & social care | 2018 |
| Sentrumsboliger Alta AS | Real estate | 2017 |
| Sentrumsgården Alta AS | Real estate | 2001 |
| Sentrumsparken Eiendom AS | Real estate | 2005 |
| Serit Holding AS | Professional & scientific | 2011 |
| Service Og Tjenester AS | Administrative & support | 2020 |
| SFM Invest AS | | 2025 |
| SG Barbo AS | Professional & scientific | 2017 |
| Shipit AS | Information & communication | 2025 |
| Shutterbird Production AS | Information & communication | 2014 |
| Sibea Invest AS | | 2025 |
| Sibø Holding AS | Construction | 2022 |
| Siffe Holding AS | | 2026 |
| Sigvaldsens Solstudio AS | Other services | 1999 |
| Silis Invest AS | Real estate | 2005 |
| Simen Finjord AS | Other services | 2025 |
| Sindre Holding AS | Construction | 2024 |
| Sindre Nyvoll AS | Construction | 2024 |
| Sinuhe AS | Professional & scientific | 2010 |
| Sisu Knitwear AS | Wholesale & retail | 2022 |
| Sit AS | Professional & scientific | 2012 |
| Sitesense AS | Information & communication | 2018 |
| Sivertsen Blikk AS | Construction | 2021 |
| Sivilingeniør Ole Hammari AS | Professional & scientific | 2013 |
| SJ Simonsen Eiendom AS | Real estate | 2021 |
| SJ Simonsen Holding AS | Transport & logistics | 2009 |
| SJH Eiendom AS | Real estate | 2013 |
| Sjursnes Hytteforening | Real estate | 2013 |
| Sjøgata 29 AS | Real estate | 2022 |
| Sjøpynt T-54-N AS | Agriculture & fishing | 2017 |
| Sjøsamegutt AS | Agriculture & fishing | 2025 |
| Ska Bygg AS | Construction | 2026 |
| Skaialuft Holding AS | | 2020 |
| Skaidi Investering AS | | 2018 |