| Sandstad Gyllensten Invest AS | Financial services | 2018 |
| Selanrå AS | Real estate | 2005 |
| Serendip AS | | 2024 |
| Sive Invest AS | Financial services | 2016 |
| Sivilingeniør Ottar Skjerve AS | Professional & scientific | 2018 |
| Skallist Consulting AS | Professional & scientific | 2022 |
| Skiferlia Kabellag SA | Real estate | 2024 |
| Skiz Da | Wholesale & retail | 2005 |
| Skomedal Holding AS | Real estate | 2015 |
| Skulpturkonservator Joanna Hench AS | Arts & recreation | 2019 |
| Skåra Næring AS | Health & social care | 2017 |
| Slettvoll Bærum AS | Wholesale & retail | 1999 |
| Slinning Holding AS | | 2018 |
| Snippesken AS | Financial services | 2016 |
| Soho Holding AS | Information & communication | 2019 |
| Sorgenfrigaten 15 AS | Real estate | 2011 |
| Spil Eiendom AS | Real estate | 2023 |
| Spinnaker Invest AS | Real estate | 2002 |
| Steinbukk AS | Financial services | 2005 |
| Stender AS | Financial services | 2015 |
| Stephanie Sikkes Photography AS | Professional & scientific | 2023 |
| Stork AS | Wholesale & retail | 1997 |
| Stork Eiendom AS | Real estate | 1999 |
| Strand-Jensen AS | | 2021 |
| Stranda Industri AS | | 2026 |
| Ståle Fatland Holding AS | Financial services | 2005 |
| Ståle Fatland Invest AS | Financial services | 2015 |
| Sverdrup Og Tandberg Ans | Wholesale & retail | 1988 |
| Svøpe AS | Information & communication | 2026 |
| Tandstad Rorbuer AS | Hospitality | 2021 |
| Tekrad AS | Professional & scientific | 2023 |
| Tekrom AS | Construction | 2021 |
| The Management Group AS | Professional & scientific | 2024 |
| Thorkildsen Eiendom AS | Real estate | 2005 |
| Thortech AS | Professional & scientific | 2025 |
| Ti 247 Holding AS | | 2023 |
| Tind Software AS | Information & communication | 2015 |
| Tipi Consulting AS | Information & communication | 2011 |
| Tipi Invest AS | Information & communication | 2008 |
| Tipito AS | | 2023 |
| Toax Holding AS | | 2025 |
| Tobin AS | Professional & scientific | 2021 |
| Tocircle Productions AS | Energy | 2013 |
| Topaas Holding AS | Construction | 2014 |
| Torbjørn Sørby Holding AS | Professional & scientific | 2019 |
| Torgeir Kjevik Architecture AS | Professional & scientific | 2025 |
| TOV23 AS | Real estate | 2020 |
| Toxipet AS | Professional & scientific | 2023 |
| Trigger Invest Holding AS | Real estate | 2010 |
| Triplex AS | Financial services | 1998 |
| Trosterud Engineering AS | Professional & scientific | 2022 |
| TÔM Péng Pung AS | | 2026 |
| Ume AS | Professional & scientific | 2007 |
| United Dreamers AS | Professional & scientific | 2019 |
| Uppal Butikkdrift AS | Wholesale & retail | 2025 |
| Varsi Holding AS | Other services | 2017 |
| Venua AS | Professional & scientific | 2005 |
| Vestre Bærum Trafikkskole AS | Education | 2011 |
| Vinovino AS | Financial services | 2008 |
| Vulgata Invest AS | | 2021 |
| Vyrst AS | Real estate | 2026 |
| Win Consult AS | Information & communication | 2017 |
| Zaragossa Invest AS | Professional & scientific | 2005 |
| Åms El Service AS | Construction | 2013 |
| Ætla AS | Professional & scientific | 2022 |