| Remesco Oy | Wholesale & retail | 2017 |
| Remontti Ilo Oy | Construction | 2018 |
| Remonttipalvelu Tolamo Oy | Construction | 2012 |
| Restasähkö Oy | Construction | 2009 |
| Retire Invest Oy | Financial services | 2018 |
| Romon Kuljetus Oy | Transport & logistics | 1997 |
| Rosari Oy | Administrative & support | 2011 |
| Rouhee Group Oy | Information & communication | 2015 |
| Ruuben Productions Oy | Arts & recreation | 2023 |
| Rytko Oy | Professional & scientific | 2024 |
| SE-Pizzeria Oy | Hospitality | 2022 |
| SK Rescue Finland Oy | Public administration | 2016 |
| SSAS Oy | Wholesale & retail | 2021 |
| STA-Invest Oy | Real estate | 1992 |
| SVX Suomi Oy | Administrative & support | 2026 |
| Samuli Katainen Ky | Financial services | 2007 |
| Sanataika ky. | Information & communication | 2002 |
| Savitaivas Oy | Arts & recreation | 2023 |
| Savonmäki Marketing Oy | Arts & recreation | 2023 |
| Savumäen Kuusitarha Oy | Agriculture & fishing | 2024 |
| Screamrock Oy | Professional & scientific | 2017 |
| Seltimil Oy | Information & communication | 2006 |
| Sepon Kiinteistöt Oy | Real estate | 2006 |
| Seripiste Oy | Manufacturing | 1980 |
| Seudun Talo Ky | Wholesale & retail | 2002 |
| Seveall Media Oy | Professional & scientific | 2024 |
| Sidebay Oy | Wholesale & retail | 2020 |
| Siparila Oy | Manufacturing | 2005 |
| Sirkka Jaakonaho Ky | Health & social care | 1997 |
| Sisustusville Oy | Construction | 2002 |
| Sisä-Suomen airsoft games Oy | Arts & recreation | 2026 |
| SkyX Oy | Administrative & support | 1987 |
| Slice Slice Baby by Waldemar Oy | Hospitality | 2025 |
| Solmas Oy | Hospitality | 2006 |
| Sovelluskehitys Rouheeta Oy | Information & communication | 2014 |
| Speedforce Oy | Information & communication | 2019 |
| Stafix Oy | Manufacturing | 2007 |
| Strawberryhill Group Oy | Financial services | 2023 |
| Stresstech Oy | Manufacturing | 2006 |
| Sulunpuu Oy | Manufacturing | 2019 |
| Sunmill Oy | Real estate | 2004 |
| Suomen KT - Kiinnitys Oy | Wholesale & retail | 2000 |
| Suomen Kiinteistötarkastus Oy | Real estate | 2014 |
| Suomen Logistigo Oy | Transport & logistics | 2011 |
| Suomen Tietovarasto Oy | Wholesale & retail | 1997 |
| Suomen Timanttitalli Ky | Manufacturing | 1996 |
| Suomen Vakuutusasiantuntijat Oy | Financial services | 2018 |
| Suomen Viihdekeskus Oy | Education | 1983 |
| Suomen maksuvalvonta Oy | Information & communication | 2018 |
| Sähkö Via Oy | Construction | 2024 |
| Sähkötekniikka Takala Oy | Construction | 1996 |
| T&P Keski-Suomi Oy | Construction | 2024 |
| T:mi Lauri Oksanen ja K:nit | Wholesale & retail | 1961 |
| TP Flushing Oy | Manufacturing | 2026 |
| TP-Asunnot Oy | Real estate | 2019 |
| TR Flow Oy | Professional & scientific | 2019 |
| TSP Asennus Oy | Construction | 2023 |
| TST Urakointi Oy | Construction | 2022 |
| Tackle Trade Finland Oy | Wholesale & retail | 2022 |
| Taksiliikenne J. Salonen Oy | Transport & logistics | 1996 |
| Taksiliikenne T. Jussila Oy | Transport & logistics | 2021 |
| Team MayerVirtanen Oy | Education | 2023 |
| Tecona Oy | Construction | 2016 |
| Teperi Trading Oy | Wholesale & retail | 2020 |
| Tervas-Ukko Oy | Public administration | 2024 |
| Terveyspalveluasema Jyväskylän Status Oy | Health & social care | 2016 |
| Teuron Kiinteistöt Oy | Real estate | 1997 |
| The FIN Networks Oy | Transport & logistics | 2016 |
| Tietolintu Oy | Professional & scientific | 2025 |
| Tikka Holding Oy | Financial services | 2020 |
| Tilapalvelu Tyry Oy | Administrative & support | 2010 |
| Tili- ja Isännöitsijätoimisto T. A. Hokkanen Oy | Professional & scientific | 1989 |
| Tilintarkastus Jouko Oy | Professional & scientific | 2008 |
| Tilitoimisto Tilitrio Oy | Professional & scientific | 2013 |
| Tilitoimisto Virta Oy | Professional & scientific | 2017 |
| Timanttityö Oy Jyväskylä | Construction | 1987 |
| Timoku Oy | Information & communication | 2022 |
| Toimintaterapia NeurOte Oy | Health & social care | 2026 |
| Toni Sammale Oy | Financial services | 2026 |
| Tovion Oy | Professional & scientific | 2025 |
| TransSite Oy | Real estate | 2000 |
| Traplight Oy | Information & communication | 2010 |
| Tunnemetsä Oy | Education | 2020 |
| Turan kuljetuspalvelu Oy | Transport & logistics | 2000 |
| U & M Peltoniemi Oy | Manufacturing | 1987 |
| Ulla-Riitta Kivinen-Sillanmäki Ky | Health & social care | 2001 |
| Ustu Oy | Construction | 2024 |
| Uuvana Oy | Hospitality | 1986 |
| VEJ Invest Oy | Financial services | 2026 |
| VH-Muovi Oy | Manufacturing | 1988 |
| VP Builder Oy | Construction | 2022 |
| VaajaSaneerauS Oy | Construction | 2012 |
| Vaajakosken Eläinlääkäriasema Oy | Professional & scientific | 2007 |
| Vaajakosken Kiinteistöpalvelut Oy | Administrative & support | 2022 |
| Vaajakosken Kuntohoito Oy | Health & social care | 1982 |
| Vaajakosken Rakennuspalvelu Oy | Construction | 1985 |
| Vaajakosken Sähköpalvelu Pekka Pitkä Oy | Construction | 2007 |
| Vaajakosken Sähkösepät Oy | Construction | 2013 |
| Vaajakosken Taikapaja Oy | Real estate | 1991 |
| Vaajakosken Teline Asennus ja Rakennus palvelut oy | Construction | 2026 |