| Revmax AS | Professional & scientific | 2021 |
| RFD AS | Agriculture & fishing | 2022 |
| Rigg Consulting AS | Professional & scientific | 2025 |
| Rikke AS | Real estate | 2015 |
| Ringsplassen AS | Professional & scientific | 2006 |
| Ringvold Botaniske Hagesenter AS | Wholesale & retail | 2021 |
| Ripplecore AS | Education | 2017 |
| River Rock Da | Professional & scientific | 2000 |
| Rivjernet AS | Financial services | 2012 |
| Robot Unicorn Holding AS | | 2020 |
| Robust Veterinærfysioterapi AS | Health & social care | 2021 |
| Rock the Boat AS | | 2026 |
| Rofl Invest AS | Information & communication | 2023 |
| Rom Mot Hardcore Da | Professional & scientific | 2000 |
| Romantikk Med Fi Da | Professional & scientific | 2000 |
| Romskollen Bolig AS | Real estate | 2019 |
| Ror & Rorleggere Da | Professional & scientific | 2000 |
| RS Håndverkere AS | Construction | 2025 |
| Rslc Holding AS | Professional & scientific | 2020 |
| Rudi Moen Eiendom AS | Real estate | 2021 |
| Rudi Moen Holding AS | Real estate | 2021 |
| Rule Invest AS | | 2024 |
| Rum & Boots Store Da | Professional & scientific | 2000 |
| Rundtom AS | Administrative & support | 2024 |
| Runers AS | Professional & scientific | 2025 |
| Råbjørn AS | Financial services | 2015 |
| Rødsåsen Utvikling AS | Real estate | 2020 |
| Røyseveien Utvikling Holding AS | Real estate | 2022 |
| Sagene Tech Ventures AS | Real estate | 2016 |
| Sagerud Entreprenør AS | Construction | 2025 |
| Saltak AS | Construction | 2023 |
| Sam Enayati Consulting AS | Health & social care | 2020 |
| Sameieservice AS | Administrative & support | 2014 |
| Sandal Kapital AS | Financial services | 2013 |
| Sande Marina AS | | 2006 |
| Sandscape AS | Real estate | 2008 |
| Sandvika Bestikk & Kniver Da | Professional & scientific | 2000 |
| Sandvika Kalkmølle AS | | 2019 |
| Sandvika Telt & Service Da | Professional & scientific | 2000 |
| Sansno Da | Information & communication | 2000 |
| Santhe Eiendom AS | Real estate | 2022 |
| Satoshi AS | | 2021 |
| Scholz Medical AS | Health & social care | 2016 |
| Schumann Holding AS | Real estate | 2008 |
| Schumann Utleie AS | Real estate | 2008 |
| Sci Nordic AS | Wholesale & retail | 2023 |
| Scilla AS | Professional & scientific | 2007 |
| Scott Chemical AS | Wholesale & retail | 2015 |
| Seashare AS | Administrative & support | 2021 |
| Second Space AS | Real estate | 2020 |
| Second Space Drift AS | Real estate | 2020 |
| Second Space Eiendom AS | Real estate | 2020 |
| Seljehaugen Invest AS | Financial services | 2007 |
| Semaphore Alpha AS | | 2021 |
| Semaphore Consulting Partners AS | Information & communication | 2006 |
| Semya Hold AS | | 2026 |
| Server Klokka Da | Professional & scientific | 2000 |
| Setemiro AS | Education | 2023 |
| Sha Bygg AS | Real estate | 2026 |
| Shape AS | | 1991 |
| Sharp Software AS | Information & communication | 2003 |
| Shogun Invest AS | | 2020 |
| Show Med Hun Og Han Da | Professional & scientific | 2000 |
| Sidestilt 1905 AS | Administrative & support | 2025 |
| Sihra Consulting AS | Professional & scientific | 2016 |
| Sinsen Registeret Da | Professional & scientific | 2000 |
| Sissi Holding AS | | 2020 |
| SJ Ventures AS | | 2025 |
| Sjulass AS | Professional & scientific | 2016 |
| Sk.Gade AS | Wholesale & retail | 2023 |
| Skadinvest AS | | 2021 |
| Skala Entreprenør AS | Construction | 2026 |
| Skallum AS | Real estate | 2021 |
| Skallum Invest AS | | 2019 |
| Skattefrie Søndag Konsulentfirma Da | Professional & scientific | 2000 |
| SKB AS | Hospitality | 2020 |
| Skiguttas Joggesko Og Lopesko Da | Professional & scientific | 2000 |
| Skjeggedal Construction Services AS | Professional & scientific | 2005 |
| Skjeggedal Invest Da | Professional & scientific | 2005 |
| Sko Galleri Da | Professional & scientific | 2000 |
| Skoyter Og Ekstremsport Da | Professional & scientific | 2000 |
| Skyfall 20 AS | | 2000 |
| Skytterhusfjellet B2A AS | Real estate | 2018 |
| Slalomryggsekker Da | Professional & scientific | 2000 |
| Sleom AS | | 2022 |
| Slopeaway Da | Information & communication | 2025 |
| Slugeburus AS | Professional & scientific | 2024 |
| Small Giants AS | | 2025 |
| Smil & Tap & Miss Da | Professional & scientific | 2000 |
| Smudgebit AS | Information & communication | 2024 |
| Snefred Invest AS | Manufacturing | 2004 |
| Snobrett TOPP40 Da | Professional & scientific | 2000 |
| Snow AS | | 2019 |
| Soba Invest AS | | 2023 |
| Sokker Og Tepper Manufaktur Da | Professional & scientific | 2000 |
| Solarpunk AS | | 2023 |
| Solbukta Boligpark AS | Real estate | 1998 |
| Solstua Invest AS | Real estate | 2017 |
| Solve Eiendom AS | Real estate | 2002 |
| Soma Capital AS | | 2024 |