| Ruokaputiikki Jutila Oy | Wholesale & retail | 2018 |
| Ruukin Tangotehdas Oy | Arts & recreation | 2020 |
| S&J Corporation Oy | Transport & logistics | 2016 |
| Satofix Ky | Construction | 2009 |
| SC Cargo Oy | Transport & logistics | 2025 |
| SMS Jakelu Oy | Transport & logistics | 2020 |
| SR Kunnossapito Oy | Administrative & support | 2021 |
| SV Hydroservice OY | Wholesale & retail | 2012 |
| SVS Talotekniikka Oy | Construction | 2019 |
| Saarela Group Oy | Professional & scientific | 2023 |
| Sade Sound & Vision Oy | Information & communication | 2026 |
| Salamapalvelut Oy | Construction | 2022 |
| Salira Oy | Wholesale & retail | 2008 |
| Salmiheimo oy | Construction | 2026 |
| Salty Capital Oy | Real estate | 2017 |
| Samppa Trans Oy | Transport & logistics | 2008 |
| Santamedia Oy | Information & communication | 2014 |
| Sarvia Oy | Information & communication | 2024 |
| Sateenkaari-ryhmis kommandiittiyhtiö | Education | 2010 |
| Sevrik Oy | Construction | 2001 |
| Sidewild Oy | Other services | 2022 |
| Siftek siivous- ja kiinteistöhuoltopalvelut Oy | Administrative & support | 2011 |
| Sisustus & Kukka Meeko Oy | Wholesale & retail | 2020 |
| Site Park Oy | Real estate | 2024 |
| SolPark Suomi Oy | Real estate | 2018 |
| Sorinco Oy | Information & communication | 2026 |
| Speed Experience Finland Oy | Administrative & support | 2022 |
| Spider Rakennus Oy | Construction | 2018 |
| Stoori by Sara Oy | Professional & scientific | 2020 |
| Suomen AV-palvelu Oy | Wholesale & retail | 2005 |
| Suomen Elävien Kuvien Valmistamo Kommandiittiyhtiö | Information & communication | 2003 |
| Suomen Kierrätyslaite Huolto oy | Manufacturing | 2013 |
| Suomen Sanimex Oy | Wholesale & retail | 1991 |
| Suomen Sähkö- ja Kiinteistötekniikka Oy | Construction | 2015 |
| Suomen Viemärihuolto Oy | Water & waste | 2017 |
| Susannh Oy | Wholesale & retail | 2017 |
| Svennen's Oy | Construction | 2006 |
| Syöverissä Oy | Hospitality | 2025 |
| Sähkö ja Automaatio Tirri Oy | Construction | 2017 |
| Sähköasennus Oikosulku & Murto Oy | Construction | 2017 |
| Sähköpalvelu Esa Heikkilä Oy | Construction | 1997 |
| Sähköpalvelu Koskela Oy | Construction | 1995 |
| T & J saneeraus ja siivous Oy | Construction | 2022 |
| T2T Palvelut Oy | Administrative & support | 2025 |
| TB Performance Oy | Wholesale & retail | 2011 |
| TG-Racing Oy | Wholesale & retail | 1990 |
| TI Dental Oy | Health & social care | 2026 |
| TKP-Team Oy | Construction | 2008 |
| TTHG Yhtiöt Oy | Professional & scientific | 2023 |
| Tabear Consulting Oy | Information & communication | 2021 |
| Taksi Joni Pyykkö oy | Transport & logistics | 2014 |
| Talousduo Oy | Professional & scientific | 2019 |
| Tamitech Automation Oy | Professional & scientific | 2013 |
| Telepia Oy | Construction | 2009 |
| Tilipalvelu Saarela Oy | Professional & scientific | 2012 |
| Tilipörriäinen Oy | Professional & scientific | 2025 |
| Tilitoimisto Anne Ikonen Oy | Professional & scientific | 2006 |
| Timanne Oy | Administrative & support | 2010 |
| Timanttitimpurit Oy | Construction | 2013 |
| Timbe R Joy Oy | Construction | 2021 |
| Timurak Oy | Construction | 2001 |
| TonyPro Oy | Other services | 2022 |
| Trade Fairway Oy | Information & communication | 2011 |
| TransFörMer Oy | Transport & logistics | 2010 |
| Transport Karila Oy | Transport & logistics | 2015 |
| Tucasa Oy | Construction | 2003 |
| Tuomisen tila Oy | Agriculture & fishing | 2024 |
| TuuSaa Oy | Health & social care | 2024 |
| Tuusulan Hitsauspalvelu Oy | Professional & scientific | 1984 |
| Tuusulan Kirvesmiehet TKM Oy | Construction | 2021 |
| Tuusulan Tasoite Haverinen Oy | Construction | 1993 |
| Tycon Ky | Construction | 2010 |
| UR-Palvelu Back Oy | Construction | 2001 |
| USA Cars&Trucks Oy | Wholesale & retail | 2005 |
| Urmas Rinne Turvallisuuskonsultointi Oy | Professional & scientific | 2003 |
| Uudenmaan Laserpuhdistus Oy | Manufacturing | 2026 |
| Uudenmaan Rakentava Oy | Construction | 2022 |
| Uudenmaan Rala Palvelut Oy | Construction | 2021 |
| VSV Holding Oy | Administrative & support | 2026 |
| VTR-Group Oy | Real estate | 2025 |
| Valomiekka Oy | Professional & scientific | 2022 |
| Veijo Hyytiäinen Ky | Real estate | 1981 |
| Veljekset Tomminen avoin yhtiö | Manufacturing | 1989 |
| Venditum Oy | Wholesale & retail | 2020 |
| Vierelläkulkijapalvelut oy | Health & social care | 2020 |
| Virjosvuo Yhtiöt Oy | Manufacturing | 1992 |
| Vuokraus K. Lahtinen Oy | Real estate | 1976 |
| Väinö-Kaarina Koti Oy | Health & social care | 2000 |
| Wayly Finland Oy | Administrative & support | 2026 |
| Wesslin Music Ltd Oy | Administrative & support | 1992 |
| White Cloud Oy | Information & communication | 2019 |
| Wiwiel Group Oy | Professional & scientific | 2020 |
| Yltech Oy | Construction | 2026 |
| Zizan Oy | Real estate | 2025 |
| fixjob oy | Construction | 2021 |
| itokamO Oy | Construction | 2018 |
| kk-siirto oy | Transport & logistics | 2020 |
| takomogym oy | Arts & recreation | 2019 |