| RM Power AS | Hospitality | 2024 |
| Rofico AS | Real estate | 2020 |
| Rolfsbukta AS | Real estate | 2001 |
| Rolfsbuktveien 12 AS | Real estate | 2021 |
| Rolfstangveien 12 AS | Real estate | 2007 |
| Rolig Entertainment AS | Arts & recreation | 2019 |
| Rolig Studios AS | Information & communication | 2020 |
| Rolseth Invest AS | Financial services | 2018 |
| Rop Coaching AS | Education | 2024 |
| RSG Holding AS | Hospitality | 2020 |
| Ruma Invest AS | | 2017 |
| Runwayfbu AS | Professional & scientific | 2021 |
| Runwayfbu Fund I AS | Information & communication | 2021 |
| Runwayfbu Fund II AS | Financial services | 2025 |
| Runwayfbu Fund Management AS | Financial services | 2024 |
| Runwayfbu People AS | | 2021 |
| Runwayfbu People II AS | | 2025 |
| Runwayfbu SLP AS | | 2025 |
| RW Development AS | Professional & scientific | 2026 |
| Råbygg Snekkern AS | Construction | 2017 |
| S. Sanner Holding Co AS | Financial services | 1927 |
| S.St Holding AS | | 2020 |
| Saag Advokatfirma AS | Professional & scientific | 2024 |
| Sabinum AS | | 1986 |
| Sadia Eiendom AS | Real estate | 2016 |
| Safenordic AS | Wholesale & retail | 2011 |
| Saga Verify AS | Information & communication | 2016 |
| Salutaris Eiendom AS | Real estate | 2012 |
| Salvesen Invest AS | | 2022 |
| Samare AS | Professional & scientific | 2023 |
| Samciere AS | Financial services | 2017 |
| Samson Invest AS | | 2020 |
| Sandviksveien 36 AS | Real estate | 1979 |
| Sanmar Eiendom AS | | 2020 |
| Savona Holding AS | | 2026 |
| Sboe AS | Professional & scientific | 2018 |
| Schiander Brug AS | Financial services | 2017 |
| Schulz Holding AS | | 2018 |
| Scoop Agency AS | Professional & scientific | 2014 |
| Seeds Punkt Fornebu AS | Hospitality | 2024 |
| Seg Solutions AS | Information & communication | 2025 |
| Selected Brands AS | Wholesale & retail | 2005 |
| Seniorråd AS | Professional & scientific | 2020 |
| Sensus Nord AS | | 2026 |
| Sequentia Holding AS | | 2021 |
| Setsaa Consulting AS | Professional & scientific | 2024 |
| Sgnskis AS | Manufacturing | 2026 |
| Show De Vida AS | Arts & recreation | 2016 |
| Show De Vida Group AS | | 2025 |
| Show De Vida International AS | Arts & recreation | 2025 |
| Sick AS | Wholesale & retail | 1993 |
| Signatur Revisjon AS | Professional & scientific | 2025 |
| Signum AS | Wholesale & retail | 2019 |
| Silar AS | Real estate | 2000 |
| Silentium 2 Holding AS | Information & communication | 2022 |
| Silentium Holding AS | Information & communication | 2021 |
| Silje Thorstensen AS | Education | 2016 |
| Simplerdays AS | Agriculture & fishing | 2020 |
| Sinep Holding AS | | 2019 |
| Sitter Invest AS | | 2022 |
| Siver AS | Professional & scientific | 2020 |
| SIVER1 AS | Professional & scientific | 2022 |
| SIVER2 AS | Professional & scientific | 2022 |
| Sixtus AS | Financial services | 1994 |
| Sjøflyhavna Kro AS | Hospitality | 2008 |
| Skansen Vekst AS | | 2024 |
| Skeidar Fornebu AS | Wholesale & retail | 1996 |
| Ski Boligutvikling AS | Real estate | 2006 |
| Skill AS | Health & social care | 2024 |
| Skoforlaget AS | Information & communication | 1999 |
| Slager AS | Information & communication | 2020 |
| Slak AS | | 2022 |
| SLB Capturi AS | Administrative & support | 2021 |
| SLB Capturi Norway AS | Professional & scientific | 2020 |
| Smart Bilreparasjon AS | Other services | 2020 |
| Smebbs Holding AS | Financial services | 2018 |
| Smedgata 45 Og 49 AS | Real estate | 2016 |
| Smith & Nephew AS | Wholesale & retail | 1982 |
| Småungene AS | Wholesale & retail | 2013 |
| Snarøyveien 32 AS | Real estate | 2004 |
| Snarøyveien 34 AS | Real estate | 2005 |
| SNT East Holding AS | Information & communication | 2008 |
| Snøtind Gruppen AS | | 2025 |
| Social Media Days AS | Administrative & support | 2020 |
| Solheim Sko AS | Wholesale & retail | 1994 |
| Soya Concept Norge Norsk Avdeling Av Utenlandsk Foretak Nuf | Wholesale & retail | 2002 |
| Space Norway Satcom AS | Information & communication | 1995 |
| Spade Future AS | Professional & scientific | 2016 |
| Span Infotech (India) Private Limited | | 2009 |
| Sparkel AS | Information & communication | 2021 |
| Spectrum AS | Wholesale & retail | 2024 |
| Speedy AS | | 2023 |
| Spirenes AS | Wholesale & retail | 2019 |
| Sports Connection Norge AS | Wholesale & retail | 2010 |
| Sprouting AS | | 2021 |
| Sprudle AS | | 2020 |
| Spæncom Nuf | Manufacturing | 2004 |
| Squadra Sport AS | Wholesale & retail | 2025 |
| SS Holding AS | Professional & scientific | 2005 |
| Staam AS | Information & communication | 2008 |