| RTM Eiendomsutvikling AS | Real estate | 2005 |
| Ruben Frisør AS | Other services | 2017 |
| Rude AS | Professional & scientific | 2012 |
| Rudihus Holding AS | | 2026 |
| Rue Du Thym 57 AS | Real estate | 2010 |
| Runde 2 AS | Professional & scientific | 2026 |
| Rune Byremo AS | Professional & scientific | 2016 |
| Rune Hodne Helse AS | Health & social care | 2021 |
| Rune's Holding AS | Wholesale & retail | 2005 |
| Runek AS | Real estate | 2014 |
| Runi Eiendom AS | Real estate | 2011 |
| Rusj Holding AS | Professional & scientific | 2023 |
| Ruthol Holding AS | Real estate | 2025 |
| Rydd AS | Administrative & support | 2026 |
| Rye Eiendom AS | Hospitality | 2022 |
| Rynning Medisinske AS | Health & social care | 2025 |
| Rypestøl Consulting Og Musikk AS | Information & communication | 2025 |
| Ryvingen Ans | Real estate | 2000 |
| RaSi EIENDOM AS | Administrative & support | 1989 |
| Rådgivende Ingeniører Løyning AS | Professional & scientific | 1993 |
| Rådhuscafèen AS | Hospitality | 2019 |
| Rådhuset AS | Professional & scientific | 2018 |
| Rådhusgata 6 AS | Real estate | 2011 |
| Rådhusgaten 8 Eiendom AS | Real estate | 1994 |
| Rådyr AS | Financial services | 2005 |
| Råmunddal AS | Real estate | 2005 |
| Råmunddal Forvaltning AS | Real estate | 2012 |
| Ræginvest AS | Wholesale & retail | 1957 |
| Rødhette Fus Barnehage AS | Education | 2015 |
| Rødland Eiendomsutvikling AS | Real estate | 2018 |
| Rødser Holding AS | Real estate | 2005 |
| Røinås Fyringsservice AS | Manufacturing | 2005 |
| Røinås Invest AS | | 2020 |
| Rølland Transport AS | Transport & logistics | 1998 |
| Rønning Moen AS | Information & communication | 2020 |
| Rønning Taxidrift AS | Transport & logistics | 2025 |
| Røo Invest AS | Real estate | 2013 |
| Rør I Sør AS | Construction | 1998 |
| Rørlegger Frigstad AS | Construction | 2013 |
| Rørlegger Frigstad Eiendom AS | Real estate | 2020 |
| Rørlegger Nordheim AS | Construction | 2021 |
| Rørlegger Paulsen AS | Construction | 2004 |
| Rørlegger Service Da | Construction | 2024 |
| Rørlegger Timenes AS | Construction | 2017 |
| Rørleggermester Ole R Tvedt AS | Construction | 2014 |
| Rørleggermester Steinar Aamodt AS | Construction | 2018 |
| Rørtek Sør AS | Construction | 2023 |
| Røsstad Blomster AS | Wholesale & retail | 2000 |
| Røsstad Eiendom AS | Real estate | 2007 |
| Røthe Holding AS | Administrative & support | 2020 |
| Røyset & Haugen AS | Real estate | 2024 |
| S & M Service Da | Administrative & support | 2007 |
| S & Ø Kile AS | | 2024 |
| S Herlofsen Holding AS | | 2021 |
| S Invest AS | Real estate | 2006 |
| S Kristiansen Bygg AS | Construction | 2020 |
| S&J - Industries Da | Arts & recreation | 2025 |
| S-Onergy Nuf | Professional & scientific | 2010 |
| S. K. Autoimport AS | Wholesale & retail | 2006 |
| S.E.L Holding AS | Real estate | 2017 |
| S.M. Eiendom AS | Real estate | 2020 |
| S.Magnussen AS | Wholesale & retail | 2025 |
| S.O. Saele AS | | 2022 |
| S.O.G. Eiendom AS | Real estate | 2012 |
| S.T Invest AS | Manufacturing | 2025 |
| S24 Kristiansand AS | Arts & recreation | 2026 |
| Saa Holding AS | Other services | 2019 |
| Sab Eiendom AS | Real estate | 2008 |
| Sabla Vittig Ans | Arts & recreation | 2024 |
| Sacha AS | Other services | 2008 |
| Sacha Invest AS | | 2025 |
| Sacs AS | Financial services | 2005 |
| Safe Innkjøp AS | Wholesale & retail | 2024 |
| Safe MSC AS | Professional & scientific | 2011 |
| Safe-Holding AS | | 2020 |
| Safeburner AS | Wholesale & retail | 2016 |
| Safeclean AS | Water & waste | 2002 |
| Safeside AS | Construction | 2019 |
| Safety Nor AS | Wholesale & retail | 2007 |
| Safety Solutions AS | Construction | 2003 |
| Safewise Engineering and Consulting AS | Professional & scientific | 2021 |
| Saga Energi AS | Energy | 2021 |
| Sagittarius AS | | 2025 |
| Sagmyra 2 AS | Real estate | 2006 |
| Sagmyra 23 AS | Real estate | 2021 |
| Sagmyra 23 Drift AS | Real estate | 2023 |
| Sagmyra 7 AS | Real estate | 1985 |
| Sagmyra Eiendom AS | Real estate | 2007 |
| Sagmyra Eiendomsinvest AS | Real estate | 2011 |
| Sagmyra Invest AS | Real estate | 2006 |
| Sagmyra Lagerbygg AS | Real estate | 2007 |
| Sah Invest AS | Financial services | 2005 |
| Sahlander Musikk , Hudpleie Og Spa AS | Arts & recreation | 2016 |
| Sait's Produkter AS | Other services | 2012 |
| Saits Lasermedisin AS | Wholesale & retail | 2006 |
| Saits Medisinske AS | Health & social care | 2020 |
| Sakura AS | Hospitality | 2006 |
| Salabim AS | Wholesale & retail | 2023 |
| Salbo Invest AS | Real estate | 2026 |
| Salconord AS | Real estate | 1988 |