| Ringinn AS | Real estate | 2024 |
| RN Eiendom AS | Real estate | 2025 |
| Roadmaster Invest AS | Wholesale & retail | 2005 |
| Rosenlitunet AS | Health & social care | 2021 |
| Rudo Babyutstyr Tønsberg AS | Wholesale & retail | 2024 |
| Råknes Gård Sjømat AS | Agriculture & fishing | 2019 |
| S Invest Holding AS | Professional & scientific | 2021 |
| S.Ektvedt AS | Construction | 2024 |
| Sagmyra 6 AS | Real estate | 2018 |
| Sanriv AS | Construction | 2020 |
| Saso Holding AS | | 2018 |
| Scan Form AS | Wholesale & retail | 1975 |
| Schveg AS | | 2022 |
| SE Mekaniske AS | Manufacturing | 2024 |
| SE Pukk AS | Construction | 2024 |
| Sem Bygg Og Vedlikehold AS | Construction | 2013 |
| Sem Energistasjon AS | Wholesale & retail | 2017 |
| Sem Fysioterapi AS | Health & social care | 2026 |
| Sem Grill & Pizza AS | Hospitality | 2024 |
| Sem Optikk AS | Wholesale & retail | 2022 |
| Sem Senteret AS | Real estate | 2016 |
| Sem Sentrum Pizza Og Grill AS | Hospitality | 2023 |
| Semsbyveien 110 AS | Real estate | 2008 |
| Semsbyveien 116 AS | Real estate | 2022 |
| Semsbyveien 84 Eiendom AS | Real estate | 2023 |
| Semsgrillen AS | Hospitality | 2010 |
| Seniorklær Vestfold AS | Wholesale & retail | 2023 |
| Septik-Tank Service BR Darup Eft AS | Water & waste | 2004 |
| Set Elektro AS | Construction | 2005 |
| Set-Eiendom AS | Construction | 2015 |
| Sirkulær Bestiller AS | Professional & scientific | 2019 |
| Sjøstrand Utvikling AS | Real estate | 2013 |
| Skibergfjell AS | Real estate | 2022 |
| Skjoldal Maskin AS | Construction | 2026 |
| Skolegata Garasjer AS | Real estate | 2014 |
| Skovly Eiendom AS | Real estate | 1991 |
| Skovly Eiendom AS Årvold | Real estate | 1997 |
| Skovly Holding AS | Real estate | 2005 |
| Skyland Tønsberg AS | Arts & recreation | 2023 |
| Smart Express Holding AS | Transport & logistics | 2024 |
| Smart Følgebil & Express AS | Transport & logistics | 2020 |
| Smestad-Gran Holding AS | | 2025 |
| Solid Bad AS | Construction | 2021 |
| Spark Management AS | Professional & scientific | 2024 |
| Spectrum Invest AS | Real estate | 2002 |
| Spekter Invest AS | Construction | 2012 |
| Sten a Gustavsen Kran Og Transport AS | Transport & logistics | 2025 |
| Stensarmen 16 AS | Real estate | 2005 |
| Stjerneskudd Holding AS | | 2025 |
| Strøm Gundersen Vestfold AS | Construction | 2016 |
| Strømmen AS | Wholesale & retail | 1988 |
| Strømmen Engineering AS | Real estate | 2020 |
| Strømmen Group AS | Wholesale & retail | 2003 |
| Sweep Bidco AS | | 2024 |
| Sweep Holdco AS | | 2024 |
| Sweep Topco AS | Information & communication | 2024 |
| Swoosh AS | Administrative & support | 2022 |
| Synne Johannesen AS | Professional & scientific | 2025 |
| Söderberg & Partners Vestfold AS | Financial services | 2021 |
| Søndre Holt B7 Eiendom AS | Real estate | 2019 |
| Tafre AS | Manufacturing | 2014 |
| Tandbergåsen Sydvest AS | Real estate | 2018 |
| Tbauctions Norway Bidco AS | Wholesale & retail | 2022 |
| Team Truckservice AS | Education | 1989 |
| Tenkekraft AS | Information & communication | 2025 |
| Tenketank AS | | 2025 |
| Tenvik Byggservice AS | Construction | 1998 |
| Tenvik Industrier AS | Wholesale & retail | 2022 |
| Terje Edh Holding AS | Administrative & support | 2005 |
| TGR Engineering AS | Real estate | 2018 |
| Thermax AS | Construction | 2002 |
| Thermax Holding AS | Construction | 2021 |
| Totalkonstruksjon AS | Manufacturing | 2015 |
| TP Bidco AS | | 2024 |
| TP Holdco AS | | 2024 |
| Tps-Vestfold AS | Professional & scientific | 2015 |
| Tri-Event AS | Administrative & support | 2015 |
| Trippel Invest AS | Real estate | 2017 |
| Træleborgodden 6 AS | Real estate | 2005 |
| Tønsberg Auto AS | Wholesale & retail | 2000 |
| Tønsberg Hageservice AS | Administrative & support | 2023 |
| Tønsberg Lyd Og Lys AS | Administrative & support | 2016 |
| Tønsberg Taxi AS | Transport & logistics | 2012 |
| Upcy AS | Professional & scientific | 2020 |
| V&V Holding AS | | 2019 |
| Vedvik Tech Holding AS | Information & communication | 2024 |
| Vestfold Assuranse AS | Financial services | 2018 |
| Vestfold Avfall Og Ressurs AS | Water & waste | 1997 |
| Vestfold Bilsalg AS | Wholesale & retail | 2025 |
| Vestfold Brannsikring AS | Professional & scientific | 2022 |
| Vestfold Maskinteknikk AS | Professional & scientific | 2026 |
| Vestfold Skadesenter AS | Other services | 2025 |
| Vestre Broen AS | Real estate | 2005 |
| Vetmax AS | Real estate | 1992 |
| Vigulf Lensberg AS | Real estate | 2009 |
| VR Lakkering AS | Other services | 2015 |
| VT Helse AS | Health & social care | 2017 |
| VVS Rørlegger'N Tønsberg AS | Construction | 2023 |
| Waister AS | Professional & scientific | 2012 |
| Webac Norge AS | Wholesale & retail | 2017 |