| Proxpect Drones AS | Professional & scientific | 2015 |
| PT Partner AS | Health & social care | 2021 |
| Public Pride AS | Health & social care | 2016 |
| Purehelp.No AS | Information & communication | 2016 |
| Q7 Eiendom AS | Real estate | 2021 |
| Racingting AS | Wholesale & retail | 2026 |
| Ramo-Data Ans | Wholesale & retail | 1995 |
| Rapidinvest AS | | 1989 |
| Real PC Service Da | Other services | 2024 |
| Ree Mining AS | Professional & scientific | 2008 |
| Regnskap Nor AS | Professional & scientific | 2017 |
| Reistad Arena Drift AS | Arts & recreation | 2012 |
| Reistad Arena Eiendom AS | Real estate | 2012 |
| Reistad Senteret Holding AS | Transport & logistics | 2021 |
| Reistad Senteret Invest AS | Real estate | 2016 |
| Reistadlia Invest AS | | 2014 |
| Ren Byggservice AS | Construction | 2025 |
| Rennaveien Holding AS | | 2020 |
| Renskaug Landbruk AS | Agriculture & fishing | 2018 |
| Renskaug Omsorg AS | Health & social care | 2006 |
| Resto Holding AS | Hospitality | 2021 |
| Retail Setup AS | Construction | 2026 |
| Rha Holding AS | Financial services | 2005 |
| Rieber-Mohn Holding AS | | 2013 |
| Rif Holding AS | Agriculture & fishing | 2005 |
| Ring Consult AS | Real estate | 1995 |
| Rising Bear AS | Professional & scientific | 2014 |
| Rmmb Invest AS | Wholesale & retail | 2025 |
| Roal Invest AS | Real estate | 2016 |
| Robert Dahlstrøm Mur AS | Construction | 2015 |
| Robosurge AS | Health & social care | 2026 |
| Rolstadgreina Vann Og Avløpsrenseanlegg SA | Water & waste | 2023 |
| Ruba Invest AS | Real estate | 2017 |
| Rubin Medical AS | Wholesale & retail | 2010 |
| Rudeng AS | Real estate | 2014 |
| Rune Ask Invest AS | | 2014 |
| RVT Regnskap AS | Professional & scientific | 2013 |
| RX Invest AS | Construction | 2018 |
| Ræstad Iversen Eiendom AS | Real estate | 2023 |
| Ræstad Iversen Holding AS | Wholesale & retail | 2017 |
| Rørhandelen AS | Wholesale & retail | 2013 |
| Rørkjøp AS | Wholesale & retail | 1999 |
| Rørleggermester Johansen AS | Construction | 2016 |
| Røyselia Utvikling AS | Real estate | 2023 |
| S O Holding AS | Construction | 2005 |
| S O Transport AS | Construction | 2007 |
| S. Bratlie AS | Construction | 2022 |
| S.A Byggteam AS | Construction | 2022 |
| Safety Engineering AS | Professional & scientific | 2013 |
| Sandaker Gartneri AS | Agriculture & fishing | 2004 |
| Sandli Invest AS | | 2021 |
| Satt Da | Real estate | 2005 |
| Scanox AS | Manufacturing | 1972 |
| Seedbuilt AS | | 2021 |
| Seedworks AS | Wholesale & retail | 2026 |
| Seierstad Holding AS | | 2004 |
| Selected Brands Nordic AB Nuf | Wholesale & retail | 1995 |
| Semsveien 40 AS | Real estate | 2018 |
| Seph Invest AS | Financial services | 2017 |
| Serb Holding AS | Financial services | 2020 |
| Sesnor International AS | Professional & scientific | 2001 |
| SGK Holding AS | Real estate | 2012 |
| Sikt Holding AS | | 2022 |
| Simaku AS | | 2023 |
| Simen Almquist Holding AS | Professional & scientific | 2022 |
| Sjåstad Handel AS | Real estate | 1998 |
| Skaar Omsorg AS | Health & social care | 2014 |
| Skancke Helse AS | Health & social care | 2026 |
| Skandesign AS | Professional & scientific | 2019 |
| Skarpsno Holding AS | | 2022 |
| Skarstad & Lian Ans | Agriculture & fishing | 2002 |
| Skolestua AS | Real estate | 2024 |
| Skråblikk Holding AS | | 2025 |
| Sloko Veilag SA | Real estate | 2005 |
| SM Invest AS | Hospitality | 2019 |
| Smakslykke Catering AS | Hospitality | 2025 |
| Snarum Gartneri AS | Agriculture & fishing | 2005 |
| Snekko AS | Construction | 2021 |
| Sofinvest AS | Professional & scientific | 2007 |
| Sofo Eiendom AS | Real estate | 2020 |
| Sole Vekst AS | | 2008 |
| Solend Consulting AS | | 2020 |
| Sollien Holding AS | | 2018 |
| Sportagio AS | Information & communication | 2024 |
| Sprintco AS | | 2026 |
| Stall Hafskjold AS | Arts & recreation | 2019 |
| Stall Hafskjold Invest AS | Real estate | 2021 |
| Stanton Invest AS | | 2022 |
| Stavaas AS | Professional & scientific | 2023 |
| Steinset Ferment AS | Manufacturing | 2020 |
| Sterlingvoss AS | Financial services | 2015 |
| Steska Holding AS | | 2026 |
| Stig in Kebab & Pizza Ans | Hospitality | 2003 |
| Stig Inn Lier AS | Hospitality | 2014 |
| Stine Farstad Holding AS | | 2025 |
| Stoppen Barnehage SA | Education | 2006 |
| Stoppen Eiendom AS | Real estate | 2019 |
| Store Valle AS | Agriculture & fishing | 2012 |
| Store Valle Invest AS | Agriculture & fishing | 2012 |
| Storesjå Holding AS | | 2025 |