| Tuomo Eskeli Ky | | 1991 |
| Tuoretie Oy | Transport & logistics | 1992 |
| Tuotantoeläinlääkäripalvelu Lehmälääkärit.com Oy | Professional & scientific | 2015 |
| TurvaMed Oy | Education | 2025 |
| Tutorivo Oy | Education | 2026 |
| Tuukka Kiviranta Oy | Professional & scientific | 2017 |
| Tuuri Sport Oy | Arts & recreation | 2022 |
| Tuvepa Oy | Manufacturing | 2019 |
| Twinport Finland Avoin yhtiö | Wholesale & retail | 2000 |
| Tyvia Oy | Professional & scientific | 2025 |
| Tyynni Oy | Administrative & support | 2023 |
| Työterveyspalvelut Jouko Varis Oy | Health & social care | 2011 |
| TähdenTie Ky | Health & social care | 2015 |
| Tähti & Kuu Taksipalvelu Oy | Transport & logistics | 2026 |
| Tähtimyynti Oy | Financial services | 2025 |
| Tähtitalot Oy | Construction | 2017 |
| Täsmä Sauna Oy | Construction | 2021 |
| Törnävän Huoltamo J. Varjamo Ky | Wholesale & retail | 1990 |
| Törnävän Kebab Pizzeria Oy | Hospitality | 2024 |
| Törnäväntien Puutavara Ky | Manufacturing | 1988 |
| UA invest Oy | Financial services | 2021 |
| UPEADESIGN Oy | Information & communication | 2022 |
| Uinu Works Oy | Other services | 2026 |
| Uitto Invest Oy | Financial services | 2024 |
| Ulfanova Oy | Manufacturing | 1989 |
| Ulla Peltokangas Ky | Wholesale & retail | 2008 |
| Ultra Kiinteistöt Oy | Professional & scientific | 2014 |
| Ultra Laskenta Oy | Professional & scientific | 2024 |
| Unelmavalmennus Oy | Education | 2023 |
| Uness Capital Oy | Real estate | 2005 |
| Unicorn Machine Oy | Professional & scientific | 2025 |
| Unilandia Oy | Wholesale & retail | 2024 |
| Unipotti Oy | Information & communication | 2021 |
| Unique Branding Oy | Manufacturing | 2011 |
| Unlimited Engineering Oy | Professional & scientific | 2026 |
| Uppa Network for Exclusive Sleeping Solutions Oy | Manufacturing | 2005 |
| Urakointi Jouppila Oy | Construction | 2016 |
| Urakointi Koivuluoma Oy | Construction | 2012 |
| Urakointi Soidinmäki Oy | Manufacturing | 1994 |
| UrakointiPalvelu A.Huhtaviita Oy | Water & waste | 2026 |
| Uretaanipojat Oy | Construction | 2014 |
| Urofysio Oy | Health & social care | 2001 |
| Uurinmäki Holding Oy | Professional & scientific | 2024 |
| V-J Koski Oy | Professional & scientific | 2014 |
| V-M Clean Oy | Wholesale & retail | 2007 |
| V2 Labs Oy | Information & communication | 2026 |
| VAE Group Oy | Real estate | 2024 |
| VAK-Invest Oy | Real estate | 1995 |
| Vatpai Invest OY | Real estate | 2019 |
| VERSO Kuntoutus Oy | Health & social care | 2012 |
| VHS Asset Management 2 Oy | Financial services | 2026 |
| VHS Asset Management Oy | Professional & scientific | 2025 |
| VHS-Capital Oy | Real estate | 2018 |
| VHision Oy | Health & social care | 2024 |
| VIA Invest Oy | Financial services | 2022 |
| VILInvest Oy | Construction | 2025 |
| VJ Kone Oy | Manufacturing | 2022 |
| VJ-Talo Oy | Hospitality | 2023 |
| VJK-Business Oy | Real estate | 1995 |
| VKE & J Invest Oy | Financial services | 2016 |
| VKE & J Sijoitus Oy | Financial services | 2011 |
| VKN Kiinteistöt Oy | Real estate | 1941 |
| VL-Vending Oy | Wholesale & retail | 2012 |
| VM Talot Oy | Professional & scientific | 2019 |
| VMJ Sales Oy | Professional & scientific | 2023 |
| VONE ENTERTAINMENT Oy | Information & communication | 2024 |
| VResolve Oy | Professional & scientific | 2026 |
| VS Vahinkopalvelut Oy | Construction | 2017 |
| VV-Kuivaus Group Oy | Construction | 2020 |
| VV-Kuivaus Oy | Construction | 2013 |
| VV-Ravintolat Oy | Professional & scientific | 2024 |
| VaWid-Yhtiöt Oy | Hospitality | 2007 |
| Vaatelainaamo Tanttu Oy | Administrative & support | 2019 |
| Vahva Fysio Oy | Health & social care | 2022 |
| Vahva Rakennus Oy | Construction | 2022 |
| Vahva visio Oy | Professional & scientific | 2024 |
| Vakaasti Oy | Real estate | 2026 |
| Vakuuttava Palomäki Oy | Financial services | 2024 |
| Vakuutusmeklari Haapasalmi Oy | Financial services | 2016 |
| Vakuutusmyynti Mattila Oy | Financial services | 2020 |
| Vakuutuspalvelu Rantala Oy | Financial services | 2023 |
| Valakia Interactive Oy | Information & communication | 2015 |
| Valjuu Venture Oy | Financial services | 2025 |
| Valko-talli Oy | Agriculture & fishing | 1985 |
| Valoa Finland Oy | Administrative & support | 2023 |
| ValonKulma Ky | Education | 2018 |
| Varatuomari Veikko Tastula Asianajotoimisto Oy | Professional & scientific | 1983 |
| Varicko Oy | Hospitality | 2019 |
| Varpu Talvitie Kommandiittiyhtiö | Wholesale & retail | 1976 |
| Vaski Components Oy | Manufacturing | 2021 |
| Vaski Group Oy | Manufacturing | 2015 |
| Vaski Munsala Property Holdings Oy | Real estate | 2025 |
| Vauhtimutka Oy | Financial services | 2022 |
| Vaura's Works Oy | Real estate | 2014 |
| VePe Oy Remontti Lähdesmäki | Construction | 2013 |
| Veemil Oy | Construction | 2022 |
| VeijaCompany Oy | Administrative & support | 1971 |
| Veisin Oy | Real estate | 1989 |
| Velipoika Oy | Professional & scientific | 2013 |
| Velj. Kuusela Oy | Real estate | 2006 |