| Stico Consult AS | Professional & scientific | 1987 |
| Stop Invest AS | Wholesale & retail | 2009 |
| Storli AS | Real estate | 2000 |
| Stormoen Invest AS | Health & social care | 2025 |
| Strøk & Stil Malerteam AS | Construction | 2025 |
| Styleriet AS | Professional & scientific | 2018 |
| Styrk Jansen AS | Information & communication | 2016 |
| Støkk AS | | 2021 |
| Summit AS | Wholesale & retail | 2002 |
| Sun Holding AS | | 2019 |
| Sunlight Energy AS | Professional & scientific | 2021 |
| Svaheim Invest AS | | 2026 |
| Svensson AS | | 2026 |
| Syfras AS | Real estate | 2005 |
| Sylvan AS | Real estate | 2012 |
| Synne Og Morfar AS | | 2006 |
| Syvende Sønn Holding AS | | 2021 |
| Syverstad Gård Selskap AS | Real estate | 2019 |
| Sønderland AS | Real estate | 2016 |
| Sønderland Invest AS | Real estate | 2018 |
| Tab Data AS | Information & communication | 1995 |
| Takeaw.Ai AS | Information & communication | 2025 |
| Tangen Consulting AS | Professional & scientific | 1992 |
| Tangen Consulting Byggkontroll AS | Professional & scientific | 2016 |
| Tannlege BG AS | Health & social care | 2026 |
| Tannlegene Nesbru Senter AS | Health & social care | 1992 |
| Tappen Management AS | Professional & scientific | 2025 |
| Tarifa AS | Real estate | 2005 |
| Taroli AS | | 2021 |
| Taskila Bygg AS | Construction | 2026 |
| Teatime Text AS | Professional & scientific | 2015 |
| Techfabrikken AS | Information & communication | 2021 |
| Tegnestudio AS | Professional & scientific | 2026 |
| Teh AS | Wholesale & retail | 2016 |
| Teleeksperten AS | Wholesale & retail | 2022 |
| Teltek AS | Professional & scientific | 2012 |
| Temahud AS | Other services | 2012 |
| Tensegrity Systems AS | | 2024 |
| Tett AS | Other services | 2005 |
| Thank Me Later AS | Professional & scientific | 2023 |
| Then Holding AS | | 2020 |
| Theodor Qviller Invest AS | | 2005 |
| Thombern AS | Administrative & support | 2005 |
| Thor Westad AS | Wholesale & retail | 1962 |
| Tilje Eiendom AS | Real estate | 2013 |
| Tithra AS | | 2017 |
| Tiva AS | Education | 2006 |
| TJ Energy AS | Professional & scientific | 2004 |
| Tjelle AS | Real estate | 2007 |
| Tmm-Invest AS | | 2023 |
| TNT Productions AS | Professional & scientific | 2024 |
| Tonerhavna Vann-Og Avløpslag SA | Water & waste | 2015 |
| Topchiro Norge AS | Health & social care | 2024 |
| Touchpoint Medical Nordic AS | Wholesale & retail | 2004 |
| Trajan Eiendomsinvest AS | Real estate | 2010 |
| Transport Support Ans | Information & communication | 1991 |
| Tre Skjul Ans | Construction | 2025 |
| Triibe AS | Information & communication | 2022 |
| Troicon AS | Professional & scientific | 2016 |
| Tropal AS | Real estate | 2007 |
| Tryet AS | Professional & scientific | 2026 |
| TSB Holding AS | Real estate | 2010 |
| Tuna Holding AS | Financial services | 2013 |
| Tyco Healthcare AG | Wholesale & retail | 1999 |
| Tympani AS | Health & social care | 2022 |
| Tyraks Holding AS | | 2023 |
| Uel Consult AS | Professional & scientific | 2026 |
| Uel Holding AS | | 2026 |
| Untitled Collective AS | Professional & scientific | 2018 |
| Urban&Raw AS | Wholesale & retail | 2016 |
| Ut Capital Partners AS | | 2024 |
| Utvendig Maling Gruppen AS | Professional & scientific | 2022 |
| Valentin Industries Holding AS | Administrative & support | 2015 |
| Valuesync AS | Information & communication | 2024 |
| Vandre Eiendom AS | | 2012 |
| Vangbo Invest AS | Real estate | 2017 |
| Vardenær Gartneri AS | Agriculture & fishing | 2001 |
| Varholmen Shipping AS | Financial services | 2008 |
| Vedi Holding AS | Financial services | 2005 |
| Vekstbarnehagen AS | Education | 2025 |
| Vendetta Music AS | Professional & scientific | 2023 |
| Ventotene Holding AS | Real estate | 2002 |
| Ventotene Røa AS | Real estate | 2006 |
| Ventura AS | Real estate | 1987 |
| Verandi AS | Professional & scientific | 2006 |
| Verifai AS | | 2026 |
| Veriton AS | | 2025 |
| Verktøyskuret AS | Administrative & support | 2020 |
| Vern Omsorg AS | Health & social care | 2022 |
| Vest Trål AS | Agriculture & fishing | 2018 |
| Vestre Linnes Vei 7 AS | Real estate | 2019 |
| Vestre Røed Vann- Og Avløpsselskap AS | Water & waste | 2016 |
| Vethe Maskin AS | Construction | 2023 |
| Viken Mathus Norge AS | Hospitality | 2024 |
| Vilya Holding AS | Financial services | 2018 |
| Vind 1 AS | | 2026 |
| Vind 2 AS | | 2026 |
| Visento AS | Information & communication | 1997 |
| Visit Savio AS | Administrative & support | 2022 |
| Vitandi AS | Professional & scientific | 2024 |