| Rød Drift & Maskin AS | Agriculture & fishing | 2023 |
| S. Andreassen Holding AS | Other services | 2024 |
| S. Evensen Holding AS | Construction | 2021 |
| Sandefjord Kjøkken Og Renovering AS | Construction | 2022 |
| SE Holding AS | Construction | 2024 |
| Seldal Bakke Invest AS | | 2021 |
| Selfsupply AS | Wholesale & retail | 2021 |
| Sharkfarm AS | Hospitality | 2025 |
| Sidesporet Elverhøy AS | Education | 2023 |
| Signo Grantoppen AS | Health & social care | 1993 |
| Signo Grunn- Og Videregående Skole AS | Education | 2012 |
| Siloen AS | | 2020 |
| Skatvedt Invest AS | | 2023 |
| Skatvedts Holding AS | Real estate | 2022 |
| Skjeggerød AS | Professional & scientific | 2018 |
| Skjoldr AS | Professional & scientific | 2020 |
| Skogstell AS | Agriculture & fishing | 2025 |
| Skogvang Eiendom AS | Real estate | 2003 |
| Skotner Gruppen AS | Wholesale & retail | 2014 |
| Skør AS | | 2021 |
| Skør Maskin & Eiendom AS | Real estate | 2019 |
| Smedsrud Maskin AS | Construction | 2007 |
| Snekkerfirma Bøen Og Ness Da | Construction | 1985 |
| Solberg Autoservice AS | Other services | 2013 |
| Solvotix AS | Information & communication | 2025 |
| Sommerstad Invest AS | Transport & logistics | 2020 |
| Sorro Holding AS | Wholesale & retail | 2019 |
| SS Eiendom AS | Real estate | 2013 |
| Steinbråten Transport AS | Transport & logistics | 2006 |
| Stirell AS | Real estate | 2021 |
| Storberg AS | Real estate | 2012 |
| Stulen Fjørfe AS | Agriculture & fishing | 2007 |
| Stålerød Bilteknikk AS | Other services | 2021 |
| Stålprosjekt AS | Manufacturing | 2009 |
| Suino Holding AS | | 2026 |
| Sukke Gartneri AS | Agriculture & fishing | 2013 |
| Sukke Mølle AS | Real estate | 1999 |
| Superpartners AS | Information & communication | 2021 |
| T Nordby Holding AS | | 2025 |
| T.I.D. Holding AS | | 2022 |
| T.S.T. Holding AS | Real estate | 2001 |
| Takservice Hus Og Hytter AS | Construction | 2022 |
| Tamm Invest AS | Information & communication | 2012 |
| Tangens-Holding AS | | 2025 |
| Tannlege Gry Bakken Rønningen AS | Health & social care | 2015 |
| Teluga AS | | 2025 |
| Tempel Da | Arts & recreation | 2018 |
| Thengs Multiservice AS | Administrative & support | 2021 |
| THL AS | Agriculture & fishing | 2012 |
| THN Eiendom AS | Real estate | 2017 |
| Torbjørn Solheim AS | Transport & logistics | 1998 |
| Toromiro AS | | 2024 |
| Total Fiscal Metering (TFM) AS | Professional & scientific | 2014 |
| Treningssenteret Andebu AS | Arts & recreation | 2005 |
| Trevland Holding AS | Administrative & support | 2012 |
| Trygve Rye-Johnson AS | Construction | 2014 |
| Tunheim Invest AS | | 2020 |
| Tømrer Henrik Næss AS | Construction | 2016 |
| Tømrermester Bernt Hagen AS | Real estate | 2001 |
| Tømrermester Jostein Jacobsen AS | Construction | 2019 |
| Ulvekula 15 AS | Real estate | 2022 |
| Unalome Holding AS | | 2023 |
| Vannposten Buar SA | Water & waste | 2014 |
| Varlomonteiro AS | Arts & recreation | 2022 |
| VBV AS | Transport & logistics | 2012 |
| Veiskillet AS | Education | 2021 |
| Vestfold Pukk Og Sand AS | Mining & quarrying | 2016 |
| Vestfold Traktor Og Maskin AS | Wholesale & retail | 2024 |
| Vestfoldmøllene AS | Manufacturing | 1899 |
| Vestre Andebu Vei 493 AS | Real estate | 2024 |
| Vierholmen AS | Manufacturing | 2021 |
| Viftrup & Pettersen AS | Construction | 2019 |
| Vitalfot AS | Health & social care | 2024 |
| VM Web AS | Professional & scientific | 2020 |
| Wilma Flis & Betong Da | Construction | 2009 |
| Wscape AS | Professional & scientific | 2024 |
| XL Marine AS | Transport & logistics | 2015 |
| Yusr AS | Manufacturing | 2022 |
| Åsen Tekniske Anlegg AS | Water & waste | 2009 |
| Ødegården Invest AS | Information & communication | 2023 |