| RL kiinteistöt Oy | Real estate | 2024 |
| RMK Liikenne-Trans Oy | Transport & logistics | 1995 |
| RMK Urakointi Ky | Administrative & support | 2010 |
| Rakennepurku M&K Oy | Construction | 2000 |
| Rakennus Toivonen Oy | Construction | 2006 |
| Rakennus Vähäsantanen Oy | Construction | 2024 |
| Rakennusliike Markku Nikunoja Oy | Construction | 2002 |
| Rakennusliike Valtaharja Oy | Construction | 1993 |
| Rakennussaneeraus Koivisto Oy | Construction | 1985 |
| Rakennusurakointi, suunnittelu ja valvonta VILI-KO Oy | Construction | 2004 |
| Rautakauppa Rauta-Java Ky | Wholesale & retail | 1986 |
| Ravintola KatriNeilikka Oy | Hospitality | 2021 |
| Recable Oy | Manufacturing | 2000 |
| Rehutrans Oy | Transport & logistics | 2018 |
| Renata team Oy | Real estate | 2020 |
| Rengas-Late Oy | Wholesale & retail | 2007 |
| Rimpinen Investment Oy | Real estate | 2025 |
| Roca Loca Oy | Financial services | 2026 |
| Rolig & Kaura Oy | Administrative & support | 2023 |
| Romupeikot Oy | Agriculture & fishing | 2011 |
| Roseva Oy | Financial services | 2022 |
| S/L Massive Ky | Construction | 2001 |
| SATbioGAS Oy | Energy | 2017 |
| SV-Ravintolat Oy | Hospitality | 1999 |
| Saarikko Holding Oy | Manufacturing | 2024 |
| Sabli Oy | Real estate | 2021 |
| Saint-Gobain PAM Finland Oy | Wholesale & retail | 2022 |
| Salamä Ravintolat Oy | Hospitality | 2025 |
| Salmin Joona Oy | Financial services | 2024 |
| Salmin Klein Oy | Wholesale & retail | 2020 |
| Salmisen Talli Oy | Real estate | 2012 |
| Sata-Color Oy | Other services | 2020 |
| SataSafety Oy | Administrative & support | 2007 |
| Satakunnan Hinauspalvelu Oy | Transport & logistics | 2023 |
| Satakunnan Palvelutaksi Oy | Transport & logistics | 2011 |
| Sensethical Oy | Wholesale & retail | 2021 |
| Seri-Seppo Ky | Manufacturing | 1981 |
| Sievarin Saha Oy | Manufacturing | 2019 |
| Sigmastore Oy | Wholesale & retail | 2024 |
| Siilotransport Oy | Transport & logistics | 2006 |
| South-West RG Oy | Hospitality | 2024 |
| Stock-Salmi Oy | Wholesale & retail | 2022 |
| Suomen tärkkelysperunantuottajat osuuskunta | Wholesale & retail | 2025 |
| Sähkö Koikkalainen Oy | Construction | 1965 |
| Sähkö Nummikari Oy | Construction | 2020 |
| Sähkö-Salmi Ky | Construction | 1994 |
| Sähkö-Wire Oy | Construction | 2011 |
| Sähköpalvelu Valtanen Oy | Construction | 2024 |
| T Salmi Oy | Construction | 2013 |
| TMK Tori- ja markkinakaupan palvelukeskus Oy | Administrative & support | 1994 |
| TMK vaunukeskus Oy | Wholesale & retail | 2024 |
| Takema Oy | Other services | 1946 |
| TaloTarmo Oy | Financial services | 2022 |
| Tammi Kiinteistöt Oy | Real estate | 2011 |
| Tapani Härkälä Oy | Arts & recreation | 2006 |
| Tapani Mattila Ky | Transport & logistics | 1986 |
| TareTee Oy | Real estate | 2022 |
| Tasoite ja Maalaus J. Elo Oy | Construction | 2021 |
| Tats and Stuff Ky | Other services | 2018 |
| Tech-Salmi Oy | Construction | 2017 |
| Teemu Harju Oy | Arts & recreation | 2026 |
| Tentech Oy | Manufacturing | 2024 |
| Teollisuusmaalaus JJ Virtanen Oy | Manufacturing | 2014 |
| Teollisuuspalvelu Salminen Ky | Administrative & support | 2008 |
| Tero Hernberg Oy | Professional & scientific | 2023 |
| Teräsrakenne J. Haapio Oy | Manufacturing | 1996 |
| Terässaari Oy | Manufacturing | 2003 |
| Tiesen Oy Harjavalta | Manufacturing | 1985 |
| Tili- ja Toimistopalvelu Sata-Euro Avoin yhtiö | Professional & scientific | 2009 |
| Tili-Etu Oy | Professional & scientific | 2000 |
| Tili-Kunnas Oy | Professional & scientific | 2005 |
| Toimistopalvelu S. Pohjonen Ky | Professional & scientific | 1993 |
| Toketek Oy | Administrative & support | 2011 |
| Trans Gateway Oy | Real estate | 1998 |
| Tuomisen Auto ja ATK Oy | Information & communication | 1990 |
| VA-PA Tuote Oy | Professional & scientific | 1993 |
| VH Holding Oy | Financial services | 2022 |
| VP-Pipeline Oy | Manufacturing | 2023 |
| Vahti Oy | Manufacturing | 1971 |
| VallanKumi Oy | Wholesale & retail | 2026 |
| ValtaSata Oy | Professional & scientific | 2013 |
| Valtaosa Oy | Wholesale & retail | 2011 |
| Valtasiirto Oy | Transport & logistics | 1997 |
| Valtavuokraus Oy | Administrative & support | 1996 |
| VarhoKiinteistöt Oy | Real estate | 2023 |
| Varhotec Oy | Wholesale & retail | 2017 |
| Veljekset Jussila Ky | Transport & logistics | 1971 |
| Veljekset Kivioja | Manufacturing | 1965 |
| Veljekset Waraosa Fager Oy | Wholesale & retail | 2020 |
| Verhoilu Pryyli Oy | Other services | 1990 |
| Vilkun Auto-Grilli Oy | Wholesale & retail | 2021 |
| WaltaSijoittajat Oy | Financial services | 2020 |
| WorkMaint Oy | Construction | 2025 |
| steelpipe oy | Manufacturing | 2025 |