| Studio Eminent Oy | Professional & scientific | 2011 |
| Sub Marine Store Oy | Wholesale & retail | 2021 |
| Suomen Kuivajäähdytys Oy | Professional & scientific | 1989 |
| Supercontract Oy | Information & communication | 2022 |
| Suunnittelutoimisto 7 Oy | Professional & scientific | 2021 |
| Systrarna Perheen tupa Oy | Real estate | 2020 |
| Sähköpalvelu Sainio Oy | Professional & scientific | 2020 |
| TEHOURAKOINTI INFRA Oy | Construction | 2016 |
| TPE Services Oy | Construction | 2006 |
| TPE Turun Pelti ja Eristys Oy | Construction | 2011 |
| TR Parkettityöt OY | Construction | 2020 |
| TS-Production Oy | Manufacturing | 2007 |
| TVV Marine Lighting Oy | Manufacturing | 2013 |
| Takametsä Holding Oy | Financial services | 2007 |
| Taksi Toimio Oy | Transport & logistics | 2009 |
| Taksi- ja Tilausliikenne Heidi & Pojat Oy | Transport & logistics | 2017 |
| Taksiliikenne Vuori & K:ni Oy | Transport & logistics | 2004 |
| Taksit Villisi Oy | Transport & logistics | 2009 |
| Talotekniikkaopisto Oy | Education | 2025 |
| Tammisillan Pajakiinteistö Oy | Real estate | 1997 |
| TaniCo Oy | Professional & scientific | 2013 |
| Tavarax Oy | Wholesale & retail | 2025 |
| Teollisuusmaalaamo M Fingerroos Oy | Construction | 1967 |
| Teollisuustuote ja -maalaus Oy | Construction | 2008 |
| Termocon Oy | Professional & scientific | 2018 |
| Tevak Oy | Construction | 2021 |
| Tietorahti Oy | Information & communication | 2016 |
| Tilausliikenne Piiroinen Oy | Transport & logistics | 2020 |
| Tili-Piikkiö Oy | Professional & scientific | 1991 |
| Tilipalvelu Ascor Oy | Professional & scientific | 1993 |
| TopCo Oy | Financial services | 2006 |
| Trans Peak Oy | Transport & logistics | 2012 |
| Traveltag Oy | Administrative & support | 2021 |
| Tre Döttrar Oy | Hospitality | 2023 |
| Tsenext Oy | Professional & scientific | 2015 |
| Tuorlan Majatalo Oy | Hospitality | 2005 |
| Tuorlan Tähtitornit Oy | Real estate | 2020 |
| Turun Betonisaumaus Oy | Construction | 2021 |
| Turun Kiinteistökuvaus Oy | Professional & scientific | 2012 |
| Turun Puhtaat Pihat Oy | Administrative & support | 1997 |
| Turun Rekkahuolto ja -pesu Ky | Other services | 1989 |
| Turun Seudun Sähköpalvelu Oy | Construction | 2019 |
| Turun Special Cars Oy | Other services | 1989 |
| Turun Teräsrakenne Lehtinen ja Kni ky | Manufacturing | 1977 |
| Turun Toimitilamarkkinointi Oy | Hospitality | 1994 |
| Turun Videokuvaus Salminen & Co | Information & communication | 1985 |
| Two Hammers Ky | Manufacturing | 2008 |
| Törnblom Holdings Oy | Professional & scientific | 2020 |
| UNITC Oy | Information & communication | 2013 |
| UltraFinn Oy | Education | 2016 |
| Unkkuri Oy | Professional & scientific | 2016 |
| V-S Merivoima OY | Construction | 2020 |
| V-S Peltisepät Oy | Construction | 2014 |
| V. Ojaranta Oy | Construction | 2011 |
| VMClubmentor Oy | Professional & scientific | 2024 |
| VS-Pinta Oy | Construction | 2023 |
| Varsinais-Suomen Kattopalvelu Oy | Construction | 2013 |
| Varsinais-Suomen Ravintolapalvelut Oy | Hospitality | 2013 |
| Varsinais-Suomen sosiaalipalvelut Oy | Health & social care | 2016 |
| Varsinais-Suomen tapahtumapalvelut Oy | Transport & logistics | 2017 |
| Veneveistämö Syrjäsuo Oy | Manufacturing | 1975 |
| Verkkohuolto EL Oy | Information & communication | 2012 |
| Verkkotukku.com/sähkö | Wholesale & retail | 2022 |
| Vesi- ja maanrakennus Lautasalo Oy | Construction | 2013 |
| VetMasters Oy | Professional & scientific | 2010 |
| Vexmari Ky | Construction | 2000 |
| Viaredco Oy | Real estate | 2020 |
| Viittomakielen tulkkaus- ja käännöspalvelu Oiva Oy | Professional & scientific | 2010 |
| Vikoba Oy | Real estate | 2019 |
| Villielli Oy | Professional & scientific | 2017 |
| ViriFas Oy | Water & waste | 2009 |
| Virsama Yhtiöt Oy | Financial services | 2026 |
| Vok Meri-Kaarina osk | Water & waste | 2014 |
| Voxonix Oy Ltd | Manufacturing | 2020 |
| Vyyryläinen Pentti, Eero ja Mika avoin yhtiö | Agriculture & fishing | 2019 |
| WE Travel Oy Ab | Administrative & support | 2011 |
| WRY Oy | Wholesale & retail | 2023 |
| Waste of Time Records Oy | Information & communication | 2015 |
| Wauranoja Oy | Professional & scientific | 2013 |
| Wesl Sport Oy | Wholesale & retail | 2003 |
| XC-Automation Oy | Professional & scientific | 2019 |
| Y & H Louhinta Oy | Construction | 2006 |
| Y-Forum Oy | Wholesale & retail | 1997 |
| Ylikylän Maanrakennus Oy | Construction | 2021 |
| Yltöisten tila Oy | Real estate | 2026 |
| Yrityspalvelu PMV Oy | Professional & scientific | 1964 |
| Z500 Design & Engineering Oy | Construction | 2022 |
| Zaprap AB | Wholesale & retail | 2023 |
| Zenessens Oy | Administrative & support | 2022 |
| Zewer Oy | Manufacturing | 2017 |
| Zilup Oy | Wholesale & retail | 1997 |
| maxarno invest oy | Real estate | 2011 |
| muoto ja OY | Professional & scientific | 2008 |