| Rakennussuunnittelu Alhainen Oy | Professional & scientific | 1984 |
| Ratilainen Ky | Wholesale & retail | 1982 |
| Rauta Marko Oy | Wholesale & retail | 2008 |
| Ravtepal Oy | Hospitality | 1989 |
| Rehutorvi Oy | Agriculture & fishing | 2024 |
| Remontti ja Maalaus Hannoset avoin yhtiö | Construction | 1998 |
| Retro Motors Oy | Other services | 2026 |
| Riihivalkea Oy | Hospitality | 2001 |
| Ruppovaaran Kanervikkola Kiinteistöt Oy | Real estate | 2003 |
| SS INFRATEK Oy | Construction | 2025 |
| Saarion Mylly Oy | Manufacturing | 2021 |
| Samapari Oy | Professional & scientific | 2023 |
| Savonlinnan LVI-Palvelu Oy | Wholesale & retail | 2019 |
| Siili Trade Oy Ltd | Wholesale & retail | 2007 |
| Siivousliike Karvonen Ky | Administrative & support | 1993 |
| Sisustus Laukkanen Oy | Wholesale & retail | 1985 |
| SoilCo Oy | Administrative & support | 2024 |
| Sport Karelia Oy | Wholesale & retail | 2026 |
| Stepping Stones - Onnentupa Oy | Education | 2013 |
| Suomen Pietarhovi Oy | Hospitality | 2016 |
| Sähköasennus Mirotex Oy | Construction | 2012 |
| Sähköhuolto J. Kattelus Oy | Construction | 2008 |
| Sähköpalvelu Lukkarinen Oy | Construction | 2024 |
| Säästökupsa Oy | Wholesale & retail | 2001 |
| TT-konepalvelu Ky | Construction | 2007 |
| Taksipalvelu Muttonen Oy | Transport & logistics | 2010 |
| Talosäätö Oy | Professional & scientific | 1993 |
| Tapsan Taimet Ky | Agriculture & fishing | 2000 |
| Televirmi Oy | Wholesale & retail | 1992 |
| Tervahaudan PesuTupa Oy | Other services | 2008 |
| Tilausliikenne Lauri Möttö Oy | Transport & logistics | 1983 |
| TinTan group Oy | Wholesale & retail | 2017 |
| Toropainen Oy Metsäkoneurakointi | Agriculture & fishing | 1984 |
| Transor Oy | Transport & logistics | 2014 |
| Traven Nopein Oy | Transport & logistics | 2021 |
| Trustworthy Media Consultants Oy | Information & communication | 2017 |
| Tuhka Hukka Oy | Wholesale & retail | 2013 |
| Tupatiimi Oy | Real estate | 1999 |
| Työosuuskunta Ruori | Administrative & support | 1997 |
| TähtiMetsä Oy | Agriculture & fishing | 2009 |
| Utopia & Utility Oy | Professional & scientific | 2012 |
| Uudenmaan Ovelta Ovelle Oy | Transport & logistics | 2021 |
| V. Tikka ky | Transport & logistics | 1977 |
| VPI Consulting Oy | Financial services | 2009 |
| Vakotek Finland Oy | Water & waste | 2015 |
| Valmennuskeskus TMA Oy | Arts & recreation | 2019 |
| Vibratec Oy | Wholesale & retail | 1989 |
| Villa Ruppovaara Oy | Real estate | 2025 |
| Villa Taivaannasta Oy | Other services | 2010 |
| Visinner Oy | Professional & scientific | 2024 |
| Viza Wood Oy | Manufacturing | 2003 |
| Zimas-Fin Oy | Manufacturing | 2013 |