| Speedfriending Impact AS | Administrative & support | 2023 |
| Sponberg Hundepensjonat AS | Other services | 2024 |
| Sport 1 Tomra AS | Wholesale & retail | 2008 |
| Sprinklerpartner AS | Wholesale & retail | 2007 |
| SSB Holding AS | Hospitality | 2023 |
| Steffen Staurset Holding AS | Real estate | 2017 |
| Stokkeland Eiendom AS | Real estate | 2025 |
| Stokkeland Multi Service AS | Construction | 2022 |
| Stokkeland Traktordrift Da | Construction | 2005 |
| Stokkeland Transport AS | Transport & logistics | 2023 |
| Straumen Bil AS | Manufacturing | 1989 |
| Straumen Eiendomsselskap AS | Real estate | 1978 |
| Straumen Holding AS | Real estate | 2005 |
| STS Øveraas AS | Financial services | 2021 |
| Sævelund Holding AS | Wholesale & retail | 2021 |
| Søvik Fjordservice AS | Manufacturing | 2023 |
| T Sivertsen AS | | 1985 |
| Terteskjell Da | Manufacturing | 1999 |
| Thai Take Away Vestnes AS | Hospitality | 2021 |
| Tina Designer Ting AS | Professional & scientific | 2025 |
| Tlervik Service AS | Wholesale & retail | 2021 |
| Tomra Konfeksjon AS | Manufacturing | 1998 |
| Toso Eiendom AS | Hospitality | 2025 |
| Total Blikk AS | Construction | 2022 |
| Total Miljø AS | Construction | 2011 |
| Totaldugnad AS | Wholesale & retail | 2026 |
| Tremek AS | Health & social care | 1995 |
| Trendzet AS | Other services | 2008 |
| Twa AS | Other services | 2023 |
| Vest Kjøttindustri AS | Financial services | 2019 |
| Vestfit AS | Arts & recreation | 2016 |
| Vestnes Begravelsesbyrå AS | Other services | 2011 |
| Vestnes Brygge AS | Real estate | 2008 |
| Vestnes Bygg AS | Construction | 2016 |
| Vestnes Bygg Eiendom AS | Real estate | 2019 |
| Vestnes Båtservice AS | Manufacturing | 2014 |
| Vestnes Dekk & Felger AS | Wholesale & retail | 2015 |
| Vestnes Energi AS | Energy | 1997 |
| Vestnes Fjordhotell AS | Hospitality | 1986 |
| Vestnes Holding AS | Financial services | 2017 |
| Vestnes Hovedgård Da | Agriculture & fishing | 2004 |
| Vestnes Husflidslag | Other services | 1985 |
| Vestnes Maskin SA | Construction | 2022 |
| Vestnes Maskinutleie AS | Administrative & support | 2025 |
| Vestnes Næringseiendom AS | Real estate | 2008 |
| Vestnes Næringspark AS | Real estate | 2018 |
| Vestnes Renovasjon AS | Water & waste | 2020 |
| Vestnes Rør AS | Construction | 2012 |
| Vestnes Taxi AS | Transport & logistics | 2014 |
| Vestnes Ur & Optikk AS | Wholesale & retail | 1997 |
| Vestnes Utleie AS | Real estate | 2026 |
| Vestnes Utleie Og Transport AS | Transport & logistics | 2023 |
| Vestnes Vassverk SA | Water & waste | 1960 |
| Vestnes Veterinærsenter AS | Professional & scientific | 2023 |
| Vestnes-Holding AS | | 2024 |
| Vestnesavisa AS | Information & communication | 1987 |
| Vestness AS | | 2026 |
| Vigri AS | Construction | 2024 |
| Vollan 2 AS | Real estate | 2012 |
| Vestnesregnskap AS | Professional & scientific | 1987 |
| Våpen & Rekvisita Vike & Breivik Ans | Wholesale & retail | 1989 |
| Ystetind AS | Financial services | 2007 |
| Ytregarden Invest AS | | 2021 |
| Åsstranda Eiendom AS | Real estate | 2021 |
| Åsvin Holding AS | | 2021 |
| Ørskogfjellet Kurs Og Familiesenter AS | Real estate | 2001 |
| Øveraas Gardsdrift Da | Agriculture & fishing | 2021 |
| Øverås Eiendom Og Entreprenør AS | Real estate | 1987 |
| Øvrebø Samdrift Da | Agriculture & fishing | 2003 |