| Turun Rakennustuote Oy | Manufacturing | 1996 |
| Turun Seutu Oy | Information & communication | 1954 |
| Turun Taksikyyti Oy | Transport & logistics | 2004 |
| Turun Teollisuuden Rakentajat Oy | Construction | 1995 |
| Turun Thermohuolto Oy | Wholesale & retail | 2004 |
| Turun Tilihallinta Oy | Professional & scientific | 1994 |
| Turun Timanttipalvelu Oy | Construction | 2006 |
| Turun Unelma-Rakennus Oy | Construction | 2017 |
| Turun seudun terveyspalvelut Oy | Wholesale & retail | 2021 |
| Turunmaan Työkonehuolto Oy | Manufacturing | 2007 |
| Tuulissuon Rautavarasto Oy | Professional & scientific | 1994 |
| Tuulissuon lasi Oy | Professional & scientific | 1983 |
| Tuulissuon monitoimitilat Oy | Real estate | 2002 |
| Tuulistarhat Oy | Agriculture & fishing | 1986 |
| Uimonen Delivery Services & Horses Oy | Transport & logistics | 2019 |
| Unelma-Remontit oy | Construction | 2021 |
| Uutela Solutions Oy | Professional & scientific | 2004 |
| V. Halme Oy | Transport & logistics | 2024 |
| VEEFIX Oy | Other services | 2023 |
| Vesikouru Ov OY | Construction | 2011 |
| VITA BEVERAGES SCANDINAVIA Oy | Wholesale & retail | 1996 |
| VJS Diamonds Oy | Wholesale & retail | 2024 |
| VS Huopakattopalvelut Oy | Construction | 2026 |
| VS Purku Oy | Construction | 1992 |
| VS-ProElectric Oy | Construction | 2021 |
| VS-Proservice oy | Manufacturing | 2016 |
| VT-Cycle Oy | Professional & scientific | 2009 |
| VT-Services Finland Oy | Transport & logistics | 2008 |
| Vaatrix Oy | Real estate | 2020 |
| Vaijeripoljin Oy | Wholesale & retail | 1984 |
| Varantia Oy | Construction | 1985 |
| Varastoaura Oy | Transport & logistics | 2010 |
| Varastokeisarit Oy | Real estate | 2020 |
| Varicon Oy | Manufacturing | 2005 |
| Varsinais-Suomen Autosähkö Oy | Other services | 2025 |
| Varsinais-Suomen Konekeskus Oy | Administrative & support | 2007 |
| Varsinais-Suomen Lämpö & Kylmä Oy | Professional & scientific | 2026 |
| Varsinais-Suomen ProCars Oy | Wholesale & retail | 2020 |
| Vesivisa Oy | Construction | 2000 |
| Vihamura Oy | Wholesale & retail | 2020 |
| Vilppi ja Filunki Oy | Financial services | 2024 |
| Vilto Oy | Construction | 1985 |
| Virjonen Oy | Administrative & support | 1975 |
| Virtanen Bros Oy | Other services | 2011 |
| Virtasen Taksi Oy | Transport & logistics | 2017 |
| Virvan ja Vesan Karvakorvat Oy | Wholesale & retail | 1996 |
| Vivahdus Oy | Information & communication | 2016 |
| Vivicaros Ky | Wholesale & retail | 2015 |
| Vohek Oy | Manufacturing | 1987 |
| Voimatek Oy | Construction | 2004 |
| Vulten Energy Oy Ltd | Manufacturing | 2019 |
| WAKA Capital Oy | Wholesale & retail | 2026 |
| WP-Katsastus Oy | Professional & scientific | 2017 |
| WS Contract Solutions Oy | Information & communication | 2019 |
| Warasto Finland Oy | Transport & logistics | 2007 |
| Wenda Oy | Wholesale & retail | 1995 |
| WendaShop Oy | Wholesale & retail | 2026 |
| West Heat Rauma Oy | Manufacturing | 1997 |
| Wetec Finland Oy | Manufacturing | 2009 |
| Wimaz Oy | Real estate | 2023 |
| Yaskawa Finland Oy | Manufacturing | 1989 |
| Yhtiöapu JA Oy | Professional & scientific | 2012 |
| Yuki Oy | Hospitality | 2025 |
| Zinaltec Oy | Manufacturing | 2004 |
| Ålandsmejeriet Finland Ab Oy | Wholesale & retail | 1994 |
| Åura Estetiikka Oy | Other services | 2026 |
| Östinvest Oy | Financial services | 1986 |