| Storgt 2 AS | Real estate | 1998 |
| Storhornet 1589 AS | Financial services | 2017 |
| Stormfugl AS | | 2019 |
| Strandhagen Horten AS | Real estate | 2020 |
| Straumsvaagen AS | Financial services | 2015 |
| Stubb Holding AS | | 2023 |
| Støltun Holding AS | Wholesale & retail | 1999 |
| Superstocks AS | Financial services | 2013 |
| Swa Invest AS | Financial services | 2010 |
| Sway Pilates AS | Education | 2026 |
| Synnfjell Vannverk SA | Water & waste | 2011 |
| System-Consult AS | Professional & scientific | 1991 |
| Sætreskogen Ans | Agriculture & fishing | 1995 |
| Søndre Traktorlag Da | Administrative & support | 2003 |
| Søppeltaxi AS | Transport & logistics | 2004 |
| Tad Invest AS | Professional & scientific | 2005 |
| TAKST4U AS | Real estate | 2015 |
| Tankeverket AS | Financial services | 2017 |
| Tasc Invest AS | Real estate | 2006 |
| Tec Venture AS | | 2005 |
| Teleinvest AS | | 2018 |
| Tell IT AS | Information & communication | 2007 |
| Terl Holding AS | Real estate | 2020 |
| Thomas Furuholding AS | | 2019 |
| Thunderstorm Solutions AS | Professional & scientific | 2025 |
| Tiger Atlantic Shipping AS | Transport & logistics | 2019 |
| Tindul AS | Professional & scientific | 2017 |
| Tinn Invest AS | Real estate | 2012 |
| Tjern Invest AS | | 2019 |
| TM 439 Holding AS | | 2023 |
| Tobob AS | Professional & scientific | 2014 |
| Tom Wilhelmsen Holding AS | Real estate | 2000 |
| Tomteprosjekt AS | Real estate | 1997 |
| Tor Sandnes AS | Information & communication | 2019 |
| Torgen Holding AS | | 2023 |
| Torgen Invest AS | | 2018 |
| Torstein Vinterstø AS | Professional & scientific | 2025 |
| Toscano Ans | Wholesale & retail | 2000 |
| Total Oppussing-Tjenester Ans | Construction | 2006 |
| TP Prodesign AS | Professional & scientific | 2026 |
| Travelis.No | Administrative & support | 2022 |
| Trevel AS | Manufacturing | 2012 |
| Trost Invest AS | Professional & scientific | 2015 |
| Trykkeriveien 1 AS | Real estate | 2020 |
| Trykkeriveien 3 AS | Real estate | 1986 |
| Trysilfjellet Boligutleie AS | Real estate | 2021 |
| Tschudi Holding AS | Professional & scientific | 2015 |
| Tun Advisory AS | Professional & scientific | 2026 |
| Turicum AS | | 2016 |
| Tussilago AS | | 2024 |
| Twain AS | Administrative & support | 2023 |
| Twentyfiveseven Consulting AS | Information & communication | 2024 |
| Twentyone AS | Administrative & support | 2021 |
| Uglen Invest AS | | 2020 |
| Ulakollen Invest AS | Financial services | 2005 |
| Uland AS | | 2015 |
| Understand AS | Professional & scientific | 2025 |
| Unit-S AS | Real estate | 2000 |
| Unitary Systems AS | Information & communication | 2005 |
| Valentin Industries AS | | 2024 |
| Valhalla Bygg AS | Construction | 2017 |
| Van Oranje AS | | 2023 |
| Vanebo Consulting AS | Professional & scientific | 2011 |
| Varangian Capital Partners AS | Professional & scientific | 2014 |
| Varga Invest AS | Real estate | 2020 |
| Vende AS | Professional & scientific | 2014 |
| Vende Invest AS | Professional & scientific | 2014 |
| Vendla Invest AS | Real estate | 2006 |
| Vendla Vann- Og Kloakklag SA | Administrative & support | 2000 |
| Vesta Invest AS | | 2021 |
| Vesta Vigilar Group AS | Professional & scientific | 2021 |
| Vestre Capital AS | Real estate | 2005 |
| Vibez Recordz Da | Information & communication | 2005 |
| Vibra Invest AS | Financial services | 2005 |
| Vici Management AS | Administrative & support | 2011 |
| Vilje Consulting AS | Professional & scientific | 2017 |
| Vlbo Holding AS | Real estate | 2016 |
| Von Krogh Kapital AS | Information & communication | 2024 |
| Walk-In Clinic Aker Brygge AS | Health & social care | 2000 |
| Wallcross AS | Real estate | 2017 |
| Wamio AS | Information & communication | 2026 |
| WB Rehab & Interiør AS | Construction | 2011 |
| Web Innovation Ans | Information & communication | 1998 |
| Wild One AS | Real estate | 2007 |
| Wilsan AS | Real estate | 2014 |
| Winther World AS | Wholesale & retail | 2026 |
| Wisem Invest AS | | 2020 |
| Woodland Property AS | Construction | 2021 |
| Wrapper AS | Professional & scientific | 2020 |
| WTF Babbler AS | Professional & scientific | 2023 |
| Ylfi AS | | 2023 |
| Zebra AS | Information & communication | 2019 |
| Zenith Medical AS | Real estate | 1992 |
| Øigarden AS | Health & social care | 2024 |
| Øistrø AS | Real estate | 2013 |
| Øjas Invest AS | | 2024 |
| Øs Holding AS | Financial services | 2013 |
| Østerliveien Have AS | Construction | 2016 |
| Øvreseth Holding AS | Wholesale & retail | 2005 |