| Rørleggermester Rune Haug AS | Construction | 2023 |
| Rørsveising AS | Education | 2017 |
| Røskestad Smolt AS | Agriculture & fishing | 2022 |
| Røyken & Hurum Trafikkskole AS | Education | 1999 |
| S Gundersen Holding AS | Manufacturing | 2005 |
| S-K Holding AS | Real estate | 2018 |
| S. Sætrevei 18-20 AS | | 2022 |
| Sahara Netthandel AS | Wholesale & retail | 2022 |
| Sandspollen AS | Administrative & support | 2018 |
| Sangyai Eiendom AS | Real estate | 2018 |
| Sbe Rental AS | Administrative & support | 2025 |
| Schulz Media AS | Information & communication | 2018 |
| Sebe Bygg Og Eiendom AS | Construction | 2021 |
| Seho Holding AS | | 2020 |
| Senstech AS | Wholesale & retail | 2016 |
| Shift Holding AS | Information & communication | 2024 |
| Shift Security AS | Information & communication | 2024 |
| Sidedoor Music Studios Nuf | Information & communication | 2010 |
| Sjaavaag AS | Information & communication | 1997 |
| Sjobego AS | Real estate | 2015 |
| Sjobego Holding Corp Nuf | Manufacturing | 2004 |
| Skalldyrekspressen AS | Wholesale & retail | 2019 |
| SKP Holding AS | Financial services | 2005 |
| Sky High Holding AS | | 2024 |
| Smartkraft AS | Wholesale & retail | 2006 |
| Snakkero AS | Health & social care | 2024 |
| Sportsconcept AS | Professional & scientific | 2013 |
| Standard Holding AS | Real estate | 2016 |
| Steinvollen AS | Financial services | 2017 |
| Stenrud Invest AS | Financial services | 2017 |
| Step in Frisør AS | Other services | 2012 |
| Sti Kapital AS | | 2026 |
| Sti Konsultasjon AS | Other services | 2026 |
| Stiftelsen Sætre Gård | Hospitality | 2013 |
| Stiil Granum AS | Construction | 1986 |
| Stine Blichfeldt AS | Financial services | 2005 |
| Strandskogen Vann- Og Avløpsselskap SA | Water & waste | 2015 |
| Strandskogen Vedlikeholdsselskap SA | Water & waste | 2022 |
| Strategisk Eiendom AS | Real estate | 2019 |
| Submara Bidco AS | Construction | 2023 |
| Submara Holding AS | Construction | 2021 |
| Submara Manco AS | | 2023 |
| Submara Midco AS | Construction | 2023 |
| Submara Prosjekt AS | Construction | 2021 |
| Sundbysand Holding AS | | 2014 |
| Support to Sport AS | Education | 2003 |
| Syrakus AS | | 2018 |
| Sætre Bilservice AS | Wholesale & retail | 1988 |
| Sætre Bruk AS | Agriculture & fishing | 1981 |
| Sætre Bruk Maskiner AS | Wholesale & retail | 2025 |
| Sætre Brygge AS | Real estate | 2022 |
| Sætre Byggpartner AS | Construction | 2019 |
| Sætre Eiendom AS | Real estate | 1999 |
| Sætre Frukt Og Grønt Dagligvare AS | Wholesale & retail | 2020 |
| Sætre Fysioterapi AS | Health & social care | 2022 |
| Sætre Havn Marina AS | Arts & recreation | 2018 |
| Sætre Havn Næring AS | Real estate | 2016 |
| Sætre Idrætsforening Graabein Eiendom AS | Arts & recreation | 2011 |
| Sætre Invest AS | Hospitality | 1996 |
| Sætre Klima AS | Construction | 2024 |
| Sætre Kran Og Transport AS | Transport & logistics | 2019 |
| Sætre Sushi & Wok AS | Hospitality | 2020 |
| Sætre Varmesentral AS | Energy | 2018 |
| Tambini & Partners AS | Professional & scientific | 2025 |
| Tapet Og Gulvtjenester AS | Construction | 1999 |
| Targets AS | Wholesale & retail | 2010 |
| Teion Holding AS | | 2026 |
| Tesa Holding AS | | 2005 |
| Teta Solutions AS | Information & communication | 2022 |
| Thai Floor Co Ltd | Construction | 2003 |
| Thanca AS | Wholesale & retail | 2020 |
| Three Monkeys AS | Financial services | 2016 |
| Time 2 Trade AS | Wholesale & retail | 2013 |
| Tine Tørlen Holding AS | | 2025 |
| TMG Bygg AS | Construction | 2021 |
| TNT Eiendom III AS | Wholesale & retail | 2010 |
| Toia Holding AS | Professional & scientific | 2019 |
| Toms Riders AS | Wholesale & retail | 2023 |
| Tomtaeiendom AS | Real estate | 2025 |
| Toppen 7 Holding AS | Real estate | 2022 |
| Toppen Holding AS | Construction | 2005 |
| Tre Trapp AS | Manufacturing | 1990 |
| Trebas AS | Construction | 2020 |
| True Crime Norge AS | Arts & recreation | 2018 |
| Tømrer Espen Bøhmer AS | Construction | 2019 |
| Tømrer Og Snekkertjenester Villmænn AS | Construction | 2023 |
| Valle Consulting AS | | 2003 |
| Vann Og Avløpservice AS | Construction | 2014 |
| Velvære AS | Wholesale & retail | 2020 |
| Verdirealisering AS | Wholesale & retail | 2001 |
| Vernly Invest AS | | 2023 |
| Vestfjorden Consulting AS | Information & communication | 2016 |
| Vestfjorden Media AS | Information & communication | 2016 |
| Vette AS | Construction | 2021 |
| Viari AS | Construction | 2016 |
| Vigar AS | Administrative & support | 2025 |
| Viken - Consulting AS | Information & communication | 2018 |
| Viken Infra AS | Professional & scientific | 2019 |
| Viking Hage & Anleggsservice AS | Construction | 2019 |
| Vippi AS | Professional & scientific | 1996 |