| Sound of Brand Oy | Professional & scientific | 2025 |
| Steelers Invest Oy | Financial services | 2017 |
| Stoneflow Oy | Construction | 2015 |
| StradaNode Oy | Information & communication | 2026 |
| Suomen Huutokaupat Oy | Information & communication | 2013 |
| Suomen Käsityön Ystävät SKY Oy | Manufacturing | 2017 |
| Syrjänen Racing Motor OY | Wholesale & retail | 2020 |
| Sähkö Luotonen Oy | Construction | 2010 |
| Sähköpalvelu Sillanpää Oy | Construction | 2023 |
| TK-urakointi Oy | Professional & scientific | 2005 |
| TTN Invest Oy | Real estate | 2025 |
| Telainfra Oy | Construction | 2025 |
| Thinmen Oy | Professional & scientific | 2004 |
| TienPäällä Oy | Transport & logistics | 2024 |
| Tilitoimisto Länsituuli Oy | Professional & scientific | 2024 |
| Timo Malén Oy | Wholesale & retail | 2000 |
| Toprima Oy | Wholesale & retail | 1993 |
| TransFinn Oy | Transport & logistics | 2000 |
| Tuda Export & Import Oy | Wholesale & retail | 2013 |
| Tuomas Junnila Ky | Agriculture & fishing | 2016 |
| Tuulia Energy Oy | Energy | 2007 |
| UTU Automation Oy | Wholesale & retail | 1976 |
| UTU Group Oy | Financial services | 1975 |
| UTU Invest Oy | Financial services | 2019 |
| UTU Oy | Manufacturing | 2001 |
| UU Logistiikka Oy | Transport & logistics | 2021 |
| Ulpire Ky | Agriculture & fishing | 1996 |
| Ulvila Data Park Development Oy | Real estate | 2026 |
| Ulvila Industrial Park Venture Oy | Administrative & support | 1989 |
| Ulvila Infra Oy | Construction | 2025 |
| Ulvila Invest Oy | Real estate | 1987 |
| Ulvila Näkymä Oy | Real estate | 2006 |
| Ulvilan Ajo-Opisto Ky | Education | 1994 |
| Ulvilan Atk-Pojat Ky | Wholesale & retail | 2001 |
| Ulvilan Autohuolto Oy | Other services | 2013 |
| Ulvilan Autopiste Oy | Other services | 2011 |
| Ulvilan Burger Oy | Hospitality | 2006 |
| Ulvilan Energia Oy | Energy | 2026 |
| Ulvilan Hiekkapuhallus ja Maalaus Halminen Ky | Manufacturing | 1981 |
| Ulvilan Hyvinvointikiinteistöt Oy | Real estate | 2026 |
| Ulvilan Jätehuolto Oy | Water & waste | 2024 |
| Ulvilan Kaihdin Oy | Manufacturing | 2020 |
| Ulvilan Konepaja Oy | Manufacturing | 1980 |
| Ulvilan Koti-ikkuna Oy | Real estate | 2007 |
| Ulvilan Palvelutaksit Oy | Transport & logistics | 2002 |
| Ulvilan Uran Tuki Oy | Wholesale & retail | 1992 |
| Ulvilan Yritysohjaus Ky | Administrative & support | 2009 |
| Ulvilan Yrityspalvelu Oy | Professional & scientific | 1990 |
| Ulvilan tilitoimisto Oy | Professional & scientific | 1989 |
| Ursus Construction Oy | Construction | 2019 |
| VIIS-Yhtymä OY | Construction | 2025 |
| VK-Kiinteistöpalvelu Oy | Administrative & support | 2008 |
| Valio Property Oy | Real estate | 2024 |
| Veljekset Talasterä | Transport & logistics | 1999 |
| Viidesosa Oy | Real estate | 2021 |
| Vinorsi Oy | Wholesale & retail | 2010 |
| Votirakennus ja palvelut Oy | Construction | 2020 |
| Vred Medical Oy | Wholesale & retail | 2020 |
| Wasea Oy | Construction | 2026 |
| Weland Oy | Manufacturing | 1986 |
| Wellquip Holding Oy | Financial services | 2012 |
| What the Business Oy | Education | 2024 |
| Wildie Oy | Professional & scientific | 2023 |
| Wine Therapy Oy | Hospitality | 2022 |
| Yyteri Holding Oy | Real estate | 2024 |
| Yyterin kartano Oy | Real estate | 2024 |
| aitohr oy | Information & communication | 2018 |
| hillok Oy | Professional & scientific | 2023 |
| Ässä-Vuokraus Oy | Administrative & support | 1989 |