| RMX2020 AS | Professional & scientific | 2020 |
| RNB Holding AS | | 2025 |
| Ro Hårstudio AS | Other services | 2025 |
| Roar Berg Invest AS | | 2005 |
| Roberg Holding AS | Professional & scientific | 2017 |
| Robergs Auto AS | Other services | 2014 |
| Rock Pocket AS | Information & communication | 2005 |
| Rogheim Invest AS | | 2022 |
| Rolfsen AS | Wholesale & retail | 1987 |
| Rolfsen Eiendom AS | Real estate | 1992 |
| Rolv Wesenlunds Vei 1 AS | Real estate | 2021 |
| Rom Hagemiljø AS | Agriculture & fishing | 1998 |
| Romerike Mote AS | Wholesale & retail | 1999 |
| Romøren Eiendom AS | Real estate | 1971 |
| Roschberg Auctions AS | Wholesale & retail | 2024 |
| Roschberg Vestfold AS | Wholesale & retail | 2024 |
| Rosegården Tønsberg AS | Wholesale & retail | 2023 |
| Rosenlunden AS | Real estate | 2012 |
| Rosentraders AS | Wholesale & retail | 2013 |
| Roser Bolig AS | Construction | 2018 |
| Roslandgruppen AS | Wholesale & retail | 2025 |
| Rossa Medisinske AS | Health & social care | 2024 |
| Rot Vinbar AS | Hospitality | 2022 |
| Rotanes AS | Construction | 2026 |
| Rothor Eiendom AS | Real estate | 1984 |
| Router AS | Professional & scientific | 2005 |
| Royal Frisør AS | Other services | 2013 |
| Royal Pizza&Grill AS | Hospitality | 2024 |
| RS Nyrerød Da | Real estate | 2003 |
| Rubix Regnskap AS | Professional & scientific | 2022 |
| Rudolf Medisin AS | Health & social care | 2022 |
| Rukus Group AS | Professional & scientific | 2014 |
| Runlab Tønsberg AS | Education | 2025 |
| RW Eiendom AS | Real estate | 2017 |
| Rysst Holding AS | Professional & scientific | 2026 |
| Rå Catering Og Event AS | Hospitality | 2017 |
| Rå Utleie AS | Administrative & support | 2022 |
| Rådhusgata 2 AS | Real estate | 2013 |
| Rådhusgt 4 Eiendom AS | Real estate | 2026 |
| Råeiendom AS | Real estate | 2023 |
| Råel Driftsmidler AS | Administrative & support | 2024 |
| Råel Eiendom AS | Real estate | 2024 |
| Råel Holding AS | Real estate | 2024 |
| Råel Invest AS | Wholesale & retail | 2023 |
| Råel Mat AS | Wholesale & retail | 2018 |
| Råel Utvikling AS | Real estate | 2010 |
| Rødningen Consult Og Invest AS | Information & communication | 1998 |
| Rønningen Gård Ans | Real estate | 2002 |
| S-Solutions AS | Professional & scientific | 2016 |
| Sach AS | Real estate | 2005 |
| Safe Lungs AS | Manufacturing | 2025 |
| Safran Fashion AS | Wholesale & retail | 2022 |
| Saga Forsikring AS | Financial services | 2019 |
| Saga Kafé AS | Hospitality | 2024 |
| Saga Welco AS | Transport & logistics | 1991 |
| Sagveien 2 AS | Real estate | 2004 |
| Sales Support Norway AS | Wholesale & retail | 2014 |
| Salong Uribus AS | Other services | 2020 |
| Sams Invest AS | Professional & scientific | 2023 |
| San - Med AS | Health & social care | 1988 |
| Sandberg Tragethon Holding AS | Financial services | 2018 |
| Sandeåsen Utvikling AS | Agriculture & fishing | 1985 |
| Sandvik & Co Da | Wholesale & retail | 2008 |
| Santex AS | Real estate | 2012 |
| Santo Invest AS | Real estate | 2011 |
| Saola Dialog AS | Administrative & support | 2024 |
| Sarwan Invest AS | Real estate | 2011 |
| Sawatdee-Thai AS | Hospitality | 2026 |
| SB Training AS | Health & social care | 2015 |
| Sbtools AS | Professional & scientific | 2019 |
| Scandinavian Energy Solutions AS | Manufacturing | 2003 |
| Scandinavian Trading Group Ans | Wholesale & retail | 1999 |
| Scandinavians AS | Professional & scientific | 2014 |
| Scanship AS | Professional & scientific | 2007 |
| Schism AS | Hospitality | 2012 |
| Schnauzer & Eftf. Klimainvest AS | | 2022 |
| Schøyen & Horntvedt AS | Transport & logistics | 2005 |
| Screenpartner AS | Information & communication | 2008 |
| Scrollytell AS | Education | 2020 |
| Sea Core AS | Real estate | 2024 |
| Sea of Norway AS | Wholesale & retail | 1989 |
| Sea One AS | Professional & scientific | 2020 |
| Seagrams AS | Wholesale & retail | 2013 |
| Seagull AS | Information & communication | 2007 |
| Security & Risk Management AS | Information & communication | 2003 |
| Seg Group AS | Real estate | 2018 |
| Segment AS | Real estate | 2017 |
| Seilskuterederiet Berntine AS | Transport & logistics | 2008 |
| Selindhjem Invest AS | | 2026 |
| Sem Invest AS | Real estate | 2005 |
| Semsbyen AS | Real estate | 2016 |
| Semsbyveien 152 AS | Real estate | 2022 |
| Sengemakeriet Tønsberg AS | Wholesale & retail | 1984 |
| Sentrum Legekontor Legene Auflem Og Magnussen Da | Health & social care | 2004 |
| Serk AS | Wholesale & retail | 2019 |
| SERVICES4CLOUD AS | Information & communication | 2019 |
| Servol Norge AS | Wholesale & retail | 2015 |
| Ses Shipping AS | Real estate | 2010 |
| Sett AS | Financial services | 2020 |
| Sevenongi AS | | 2026 |