| Rekon AS | Information & communication | 2025 |
| Ren Hjelp AS | Administrative & support | 2026 |
| Ren Master AS | Administrative & support | 2025 |
| Rent Bygg AS | Administrative & support | 1997 |
| Research & Marketing AS | Wholesale & retail | 2001 |
| Resolve Digital AS | Information & communication | 2023 |
| Revhs AS | | 2023 |
| RHS Transport Nuf | Transport & logistics | 2018 |
| Risløkkveien 66 AS | | 2018 |
| Robert Bosch GmbH | Wholesale & retail | 1996 |
| Robert Kay Holding AS | Financial services | 2017 |
| Robvarde AS | Wholesale & retail | 2026 |
| Roos Enterprise AS | Health & social care | 2021 |
| Rosenlund Bydelssenter AS | Real estate | 2005 |
| Roza Vision AS | Administrative & support | 2025 |
| Rozario Da | Arts & recreation | 2023 |
| Rune Røste Holding AS | Other services | 2019 |
| Runwith AS | Information & communication | 2023 |
| Rwy Holding AS | | 2026 |
| RZG AS | Wholesale & retail | 2025 |
| Rør-Kontakten AS | Construction | 2018 |
| Rørleggermester Tommy Paulsen & Sønner AS | Construction | 1989 |
| Safe Designs Nuf | Professional & scientific | 2010 |
| Sagstua Grendelag SA | Other services | 1985 |
| Samo Service AS | Administrative & support | 1995 |
| Sander Nyhagen Holding AS | | 2025 |
| Satin Bower AS | Professional & scientific | 2011 |
| SC Consulting AS | Professional & scientific | 2015 |
| Scandic Engros AS | Wholesale & retail | 2018 |
| Sender Holding AS | | 2024 |
| Sentir-It AS | Information & communication | 2011 |
| Serveringsgruppen AS | Hospitality | 2019 |
| Sevaldsen Holding AS | | 2022 |
| Sga Consult AS | Professional & scientific | 2015 |
| Shake Your Da | Arts & recreation | 2016 |
| SHB Eiendom AS | Real estate | 2020 |
| Sibr AS | | 2019 |
| Silverfish AS | Wholesale & retail | 2018 |
| Simarud Holding AS | | 2022 |
| Simone Naumann Photography AS | Professional & scientific | 2024 |
| Sirkulær Ombruk AS | Other services | 2024 |
| Ski Eiendomspartner AS | Real estate | 2021 |
| Ski Entreprenør AS | Construction | 2010 |
| Skilpadda AS | | 2020 |
| Skkm Holding AS | | 2026 |
| Skrey AS | Professional & scientific | 2019 |
| Skyz AS | Information & communication | 2016 |
| SLB Holding AS | Construction | 2017 |
| Smart Retur AS | Wholesale & retail | 2017 |
| Smart Retur Holdco AS | Wholesale & retail | 2020 |
| Smart Retur Holding AS | Wholesale & retail | 2020 |
| Smart Retur Norge AS | Wholesale & retail | 2009 |
| Smart Work AS | Manufacturing | 2017 |
| Smedbøl Eiendom AS | Real estate | 2018 |
| Smith Prosjekt & Drift AS | Administrative & support | 2021 |
| Smådyrklinikk Langhus AS | Professional & scientific | 2006 |
| Snipetjernveien 10 Norge AS | Real estate | 2010 |
| Soad AS | Professional & scientific | 2012 |
| Solheim Eiendom AS | Real estate | 1976 |
| Sparby Trafikkskole AS | Education | 2021 |
| Staal Direktesalg Ans | Administrative & support | 1997 |
| Stabu Eiendom AS | Real estate | 2021 |
| Stabu Invest AS | Real estate | 2013 |
| Steel Flow Holding AS | | 2022 |
| Steenersen Music AS | Information & communication | 2019 |
| Steinar Hansen Holding AS | Financial services | 2006 |
| Steinar Larsen Transport AS | Transport & logistics | 2004 |
| Sto Norge AS | Wholesale & retail | 1990 |
| Stock Box Holding AS | Information & communication | 2021 |
| Storgt 95 Grimstad AS | Real estate | 2018 |
| Styrkar Havn AS | | 2024 |
| Subway Safari Da | Arts & recreation | 2003 |
| Suportnet Agro AS | Wholesale & retail | 2008 |
| Sureness AS | Wholesale & retail | 2024 |
| Sushi-Teria Langhus AS | Hospitality | 2024 |
| Sve-Nor AS | Wholesale & retail | 1974 |
| Sveinung Sørsdal-Myrlid Holding AS | | 2025 |
| Sviir - Da | Arts & recreation | 2024 |
| Sydtveit AS | Professional & scientific | 1995 |
| Syntaxpoint AS | Professional & scientific | 2021 |
| Simarud Electronic A/S | Manufacturing | 1974 |
| Sørlys Studio AS | Professional & scientific | 2025 |
| Taksthuset 1 AS | Real estate | 2023 |
| Taksthuset 1 Oslo/Drammen AS | Real estate | 2026 |
| Taksthuset Follo SA | Real estate | 2010 |
| Tapestry AS | Wholesale & retail | 2024 |
| Tavletek AS | Manufacturing | 2013 |
| Tece Norge AS | Wholesale & retail | 1986 |
| Tehnoair AS | Construction | 2022 |
| Tem Konsult AS | Professional & scientific | 2026 |
| Thask Holding AS | | 2020 |
| Thermo Control AS | Construction | 1997 |
| Tida Invest AS | Real estate | 2021 |
| Tiebreak Consulting AS | Information & communication | 2007 |
| Tiller Consult AS | Professional & scientific | 2024 |
| Tingverk AS | Information & communication | 2026 |
| TMS Byggservice AS | Construction | 2014 |
| To-Tech.No AS | Wholesale & retail | 2004 |
| Toe Invest AS | | 2020 |
| Tonneau 2 AS | Wholesale & retail | 2018 |