| Smaken Catering AS | Hospitality | 2022 |
| Smart Choice AS | Hospitality | 2016 |
| Smartere Planforslag AS | Professional & scientific | 2023 |
| Smartkjøp AS | Wholesale & retail | 2018 |
| SMB Montering AS | Construction | 2021 |
| Smet Eiendom AS | Real estate | 2021 |
| Smil Med Stil AS | Wholesale & retail | 2023 |
| Smith AS | Administrative & support | 2018 |
| Smiths Digital AS | Wholesale & retail | 2020 |
| Smiths Holding AS | Real estate | 2018 |
| Småbedrifter Holding AS | | 2006 |
| Solberg VVS Service AS | Construction | 2008 |
| Solberggrenda 9 AS | Real estate | 2022 |
| Solbergtunet Utvikling AS | Real estate | 2025 |
| Solskinn & Sang AS | Arts & recreation | 2024 |
| Solstadveien 2 AS | Real estate | 2021 |
| Soltoppen Holding AS | | 2025 |
| Soltoppen Holmestrand AS | Real estate | 2013 |
| Solum Invest AS | Arts & recreation | 2001 |
| Solum Pukkverk AS | Mining & quarrying | 2012 |
| Somebodymakeit AS | Information & communication | 2025 |
| Sonny's Kebab Ans | Hospitality | 2005 |
| SP Newco AS | | 2026 |
| Sparebankgården Holmestrand AS | Real estate | 2011 |
| Spartabutikk AS | Wholesale & retail | 2023 |
| Speira AS | Manufacturing | 1995 |
| Speira Bidco II AS | Manufacturing | 2021 |
| Sprøytelakkering AS | Construction | 2021 |
| Stangeland Blåseisolering AS | Construction | 2026 |
| Stanson Holding AS | Real estate | 2024 |
| Stdin AS | | 2019 |
| Steinar L Hansen AS | Construction | 2024 |
| Stendals Holding AS | Wholesale & retail | 2024 |
| Stensby Tech AS | Information & communication | 2024 |
| Stine Breidablikk AS | Wholesale & retail | 2015 |
| Stopover AS | Transport & logistics | 2018 |
| Storgaten 45 Tønsberg AS | Real estate | 2014 |
| Storkjøkken Grossisten Vestfold AS | Wholesale & retail | 2003 |
| Storm BHP Holding AS | | 2021 |
| Storm Company Ans | Wholesale & retail | 1999 |
| Strand Elektro AS | Construction | 2001 |
| Strandholmen AS | Real estate | 2018 |
| Strandholmen Eiendom AS | Real estate | 2014 |
| Street Food Skandinavia AS | Administrative & support | 2023 |
| Strømsøboat AS | Wholesale & retail | 2021 |
| Stu Invest AS | | 2022 |
| Stubberud AS | Professional & scientific | 2016 |
| Styreg Norge AS | Manufacturing | 2018 |
| Sub Holmestrand AS | Hospitality | 2023 |
| Sub:Marin AS | Education | 2026 |
| Sum Sum Da | Agriculture & fishing | 2000 |
| Sundance Norge AS | Wholesale & retail | 1997 |
| Sundbyfoss Kraftlag AS | Energy | 2022 |
| Suntean AS | Real estate | 2023 |
| Super Pizza Holmestrand AS | Hospitality | 2026 |
| Susa AS | Hospitality | 2021 |
| Suttle Holding AS | | 2018 |
| SV22H AS | Real estate | 2005 |
| Svaleredet AS | Wholesale & retail | 2022 |
| Svarholt Holding AS | Real estate | 2015 |
| Svebakk Nøstdahl Holding AS | | 2024 |
| Svein Stensrud Holding AS | | 2005 |
| Svendgård Invest AS | Financial services | 2005 |
| Sverco Estate AS | Real estate | 2019 |
| Sverco Holding AS | Professional & scientific | 2018 |
| Sverco Invest AS | | 2018 |
| Sverre Foss Blikkenslagerverksted AS | Construction | 1967 |
| Sælid HC Elektro AS | Construction | 1993 |
| Sæterlid Og Normann Produkter Da | Manufacturing | 1997 |
| Sæther Invest AS | | 2021 |
| Sølvreven AS | Wholesale & retail | 2006 |
| Søstrenes Bakeriprodukter Ans | Manufacturing | 2017 |
| T Berg Anleggsteknikk AS | Construction | 2004 |
| T. Berg Eiendom AS | Real estate | 2005 |
| Tannklinikken Jack Kuvaas AS | Health & social care | 2023 |
| Tannlege Ekeli AS | Health & social care | 2012 |
| Tannlege Kenneth Navelsaker AS | Health & social care | 2009 |
| Tannlege Øystein Misje AS | Health & social care | 2017 |
| Tannregulering Holmestrand AS | Health & social care | 2025 |
| Tarek Holding AS | | 2026 |
| Taste of Thailand AS | Hospitality | 2013 |
| Team-Klinikken Da | Health & social care | 2011 |
| Tefi Holding AS | Real estate | 2023 |
| Tek 20 Holding Ltd Nuf | | 2019 |
| Tek Bil AS | Wholesale & retail | 2013 |
| Temir Holding AS | Real estate | 2019 |
| Tenvig Holding AS | Real estate | 1922 |
| Tenvig Holmestrand AS | Real estate | 2017 |
| Terapeutmoe AS | Health & social care | 2024 |
| Terje Pettersen AS | Real estate | 1998 |
| TG12 Invest AS | Real estate | 2022 |
| THL Invest AS | | 2018 |
| Thomas Opsahl Maskin Og Metall AS | Wholesale & retail | 2023 |
| Tige Bakeriprodukter AS | Manufacturing | 2019 |
| Tilpynt AS | Wholesale & retail | 2017 |
| Tina Bakeriprodukter AS | Manufacturing | 2021 |
| Tina Hagen AS | Administrative & support | 2019 |
| Tiny House Norge AS | Wholesale & retail | 2023 |
| TK Betong Og Grunn AS | Professional & scientific | 2016 |
| TKS Holding AS | | 2018 |