| Rørfornying AS | Construction | 2025 |
| Rørleggerfirma Kjelgaard AS | Construction | 2004 |
| Sanad Flislegging AS | Construction | 2022 |
| Sansehjørnet AS | Wholesale & retail | 2023 |
| Sarkbil AS | Other services | 2026 |
| SC Blu AS | | 2023 |
| Scientia AS | | 2023 |
| Sejmer AS | | 2026 |
| Senioernes Håntverkcenter Nuf | Construction | 2016 |
| SFG Holding AS | Other services | 2024 |
| Shaping New Tomorrow Norge AS | Wholesale & retail | 2022 |
| Shark Gaming Systems | Wholesale & retail | 2019 |
| SHZ AS | | 2024 |
| Sikkerhetsrådgiveren AS | Professional & scientific | 2023 |
| Sikt AS | Financial services | 2005 |
| SJS Group AS | | 2025 |
| SJS Logistics AS | Transport & logistics | 2026 |
| SJS Racing Ans | Arts & recreation | 2025 |
| SJS Racing AS | Arts & recreation | 2026 |
| Sjøseth AS | Wholesale & retail | 2022 |
| Skaimar Bygg AS | Construction | 2019 |
| Skala Capital AS | | 2026 |
| Skala Investments AS | | 2026 |
| Skangods AS | Transport & logistics | 2001 |
| Smartting AS | Wholesale & retail | 2020 |
| Sparkel Øst AS | Construction | 2002 |
| Sparkguard AS | Wholesale & retail | 2025 |
| Stensby AS | Real estate | 1989 |
| Stæhr AS | Wholesale & retail | 2020 |
| Summit Simplicity AS | Professional & scientific | 2024 |
| Svalbo AS | Wholesale & retail | 2019 |
| Switchboard AS | Information & communication | 2026 |
| Sydtveit Eiendom AS | Real estate | 1980 |
| Sydtveit Holding AS | | 1997 |
| SYNERGI-1 AS | Construction | 2013 |
| Systemteknikk AS | Wholesale & retail | 2016 |
| Tani Holding AS | Real estate | 2019 |
| Tbe Trading AS | Administrative & support | 2018 |
| Techpm AS | Information & communication | 2021 |
| Teid AS | Real estate | 2016 |
| Termofoto AS | Professional & scientific | 2020 |
| Ternen Transport AS | Administrative & support | 2023 |
| Texheim AS | Wholesale & retail | 2025 |
| TG Byggvedlikehold AS | Construction | 2019 |
| Thonhaugen Holding AS | | 2021 |
| Thorvaldsen Invest AS | Real estate | 1968 |
| Tidemann Invest AS | Information & communication | 2014 |
| Tor Lunde Eiendom AS | Real estate | 1998 |
| Torgeir Løken AS | Wholesale & retail | 2015 |
| Total Bad & VVS AS | Construction | 2025 |
| Total Transport AS | Transport & logistics | 2014 |
| Tovengen Eiendomsutvikling AS | Real estate | 1997 |
| Transgrav AS | Construction | 1994 |
| Tsa Da | | 2026 |
| Ttel AS | Construction | 2019 |
| Tverli Aut Holding AS | Manufacturing | 2021 |
| Tverli Sveis AS | Manufacturing | 2000 |
| Tveter Rørservice AS | Construction | 2022 |
| Twohundred Norway AS | Administrative & support | 2026 |
| Tåjeveien 2 AS | Real estate | 2024 |
| U Og F Holding AS | | 2025 |
| Ucit Services AS | Arts & recreation | 2009 |
| United Norwegian Oils AS | Wholesale & retail | 2020 |
| Utomhus - Entreprenøren AS | Administrative & support | 2014 |
| Vander Solutions AS | Information & communication | 2026 |
| Vandree Holding AS | Real estate | 2018 |
| Vanglistubben AS | Real estate | 2022 |
| Vardalife AS | Wholesale & retail | 2014 |
| Vaskekjærringene AS | Administrative & support | 2021 |
| Vedlikeholdsprosjekt AS | Construction | 2010 |
| Vei & Trafikk Consult AS | Administrative & support | 2013 |
| Veitransport AS | Transport & logistics | 1994 |
| Verdier Invest AS | | 2017 |
| Viba Utleie AS | Administrative & support | 2026 |
| Viega Nuf | Construction | 2004 |
| Vik Tomtelag AS | Real estate | 2016 |
| Vika Bygg & Anlegg AS | Professional & scientific | 2012 |
| Viken Avfall AS | Transport & logistics | 2019 |
| Viken Gulvavretting AS | Construction | 2020 |
| Viken Trykk & Produksjon AS | Manufacturing | 2018 |
| Vising AS | Professional & scientific | 2022 |
| Vitasbygg AS | Real estate | 2025 |
| Våg Blomsterstue AS | Wholesale & retail | 2001 |
| Våg Post AS | Transport & logistics | 2015 |
| Vågvann Panorama AS | Real estate | 2014 |
| Welfie AS | Other services | 2020 |
| What the Fluff AS | Other services | 2024 |
| Widnes & Øksnevad Da | Education | 1998 |
| Winstaco Nordic AS | Construction | 2022 |
| Xito Norway AS | Administrative & support | 2019 |
| Ytre Enebakk Tannklinikk AS | Health & social care | 2017 |
| Ytre Enebakk Treningssenter AS | Arts & recreation | 2020 |
| Åreknuteklinikkene AS | Health & social care | 2016 |
| Østgata AS | Real estate | 2022 |
| Østlandet Consult AS | Wholesale & retail | 2024 |
| Østmarka Vaktmesterservice AS | Administrative & support | 2019 |
| Østmarkskollen Fus Barnehage AS | Education | 2021 |
| Østvaag Prosjekt AS | Real estate | 2026 |