| Sbht Consulting AS | Information & communication | 2022 |
| Sbht Holding AS | Information & communication | 2021 |
| Schanche Holding AS | Financial services | 2021 |
| Schwaben Invest AS | | 2022 |
| Seger AS | Agriculture & fishing | 2016 |
| Sejakobs Holding AS | | 2025 |
| Selskapslokaler I Oslo AS | Hospitality | 2021 |
| Senthan Eiendom AS | Real estate | 2021 |
| Sentral Gruppen AS | Real estate | 2020 |
| Sentral Holding AS | | 2025 |
| Serrano AS | Health & social care | 1998 |
| Serranos Bodega AS | Wholesale & retail | 2009 |
| Service Satellites AS | Information & communication | 2016 |
| Servicebee AS | Administrative & support | 2013 |
| Shaa Holding AS | Professional & scientific | 2020 |
| Shakari AS | Information & communication | 2020 |
| Shakari Consulting AS | Information & communication | 2020 |
| Share AS | | 2020 |
| Shawkat Venture Partners AS | Information & communication | 2018 |
| Shemjakin Art Academy AS | Education | 2022 |
| Sibo AS | Real estate | 1993 |
| Siem Onshore AS | Professional & scientific | 2011 |
| Siffer Invest AS | Real estate | 2009 |
| Singh's Buss AS | Transport & logistics | 2017 |
| Siri Jensen AS | Education | 2025 |
| Sirlee AS | Real estate | 2018 |
| Sivesind Holding AS | Financial services | 2014 |
| Skatrud Music AS | Arts & recreation | 2026 |
| Skjettenkollen Holding AS | | 2025 |
| SKP Group AS | Professional & scientific | 2026 |
| Slettbakk Invest AS | | 2023 |
| Smart Bilpleie Oslo AS | Other services | 2011 |
| Smilefjes AS | | 2022 |
| Smoothstyle AS | Transport & logistics | 2026 |
| So Boligutvikling AS | Real estate | 2024 |
| So Herje AS | Financial services | 2017 |
| Sol & Skygge Limited Nuf | Construction | 2009 |
| Solvennen AS | Wholesale & retail | 2019 |
| Sonodin AS | | 2023 |
| SP Byggfornyelse AS | Construction | 2024 |
| Spekemat Kompaniet AS | Wholesale & retail | 2020 |
| Sprell Levende AS | Health & social care | 2006 |
| SR Bilsalg AS | Wholesale & retail | 2018 |
| SR Finans AS | | 2023 |
| Stavik Invest AS | Professional & scientific | 2020 |
| Stay Lofoten AS | Real estate | 2024 |
| Stein Grøtting AS | Transport & logistics | 2020 |
| Steinbekk Invest AS | Financial services | 2019 |
| Stjerne Eiendom 1 AS | Real estate | 2025 |
| Storsul Holding AS | Transport & logistics | 2022 |
| Structura Byggkonsult AS | Professional & scientific | 2025 |
| STS Technology AS | Information & communication | 2015 |
| Stubbevaa AS | | 2024 |
| Studio Mori Da | Education | 2026 |
| Sturm Holding AS | Real estate | 2018 |
| Suksess Trafikkskole AS | Education | 2012 |
| Sulli Eiendom AS | Professional & scientific | 2026 |
| Sveen Bil Fjellhamar AS | Other services | 2022 |
| Svitsjboard AS | Information & communication | 2025 |
| Syrian Food AS | Hospitality | 2025 |
| Sørenbye Eiendom AS | Real estate | 2005 |
| T&H Holding AS | Real estate | 2026 |
| T-Agency 2020 AS | Wholesale & retail | 2020 |
| T/T Holding AS | Real estate | 2021 |
| Tacs Railroad AS | Professional & scientific | 2020 |
| Tak Og Fasadeklatring AS | Construction | 2026 |
| Takkonsulenten AS | Professional & scientific | 2026 |
| Takråd a. Kalland Øst AS | Professional & scientific | 2017 |
| Takt Og Tone AS | Education | 2012 |
| Tale Invest AS | Professional & scientific | 2016 |
| Tallrik Regnskap AS | Professional & scientific | 2016 |
| Tapas Tapas Da | Hospitality | 2007 |
| Tapas Tapas Lørenskog Hus Da | Hospitality | 2010 |
| Tchaikov AS | Information & communication | 2024 |
| Tehmta Holding AS | Real estate | 2003 |
| Tek Solutions AS | Professional & scientific | 2019 |
| Teka-Invest AS | | 2020 |
| Teknisk Drift Og Eiendom AS | Construction | 2020 |
| TEN-4 AS | Professional & scientific | 2017 |
| Tessta Estate AS | Real estate | 2014 |
| Teta Ans | Information & communication | 2004 |
| TFF AS | Arts & recreation | 2025 |
| Thocap AS | Financial services | 2016 |
| Thomas Halvorsen Holding AS | Financial services | 2012 |
| THS Løvold AS | Wholesale & retail | 1990 |
| Tischlerdienstleistungen | Construction | 2005 |
| Tobas AS | Professional & scientific | 2017 |
| Toff AS | Professional & scientific | 2022 |
| Topp Stemning Holding AS | | 2020 |
| Tramonto Film AS | Information & communication | 2015 |
| Trappevask Service AS | Administrative & support | 2020 |
| Treklame AS | Professional & scientific | 2015 |
| Trines Mat AS | Information & communication | 2015 |
| Trinhle Invest AS | Wholesale & retail | 2021 |
| Triva Subsea AS | Professional & scientific | 2026 |
| Trollerudmoen AS | Real estate | 2017 |
| Trollskogen AS | Real estate | 2022 |
| TT Nordic Logistics AS | Transport & logistics | 2026 |
| TTF Bygg Og Eiendom AS | Real estate | 2018 |
| Turnsole AS | Information & communication | 2013 |