| Haaparakennus Oy | Construction | 2005 |
| Hakobuild Oy | Construction | 2024 |
| Halpurit Oy | Wholesale & retail | 2020 |
| Hanman Ky | Information & communication | 2006 |
| Hannu Tyrväinen Oy | Wholesale & retail | 2020 |
| Harri Selänne Oy | Health & social care | 2010 |
| Harvia Finland Oy | Manufacturing | 1961 |
| Harvia Group Oy | Professional & scientific | 2014 |
| Harvia Oyj | Financial services | 2014 |
| Hautalanmäen- ja Rauvanlahdentien Vesiosuuskunta | Water & waste | 2004 |
| Hear & Sing Oy | Information & communication | 2025 |
| Heart Holding Oy | Professional & scientific | 2021 |
| Heatles Oy | Manufacturing | 2020 |
| Helsinki Aesthetic Clinic | Health & social care | 2026 |
| Hilden Real Estate Oy | Real estate | 2021 |
| Hitsauspalvelu Airikainen avoin yhtiö | Manufacturing | 1990 |
| HoivaDuo Oy | Health & social care | 2026 |
| Holdi Oy | Wholesale & retail | 2019 |
| Huoltopalvelu Hanski Oy | Manufacturing | 2018 |
| Hydromachin Oy | Wholesale & retail | 2011 |
| HyvinMedi Oy | Health & social care | 2020 |
| I.sakki Oy | Wholesale & retail | 2016 |
| IPEOtech Oy | Manufacturing | 2018 |
| Idea Associates Oy | Real estate | 1997 |
| Ilo ja Idea Tapahtumatuotanto Oy | Administrative & support | 2026 |
| Imata Oy | Health & social care | 2013 |
| Info Key Oy | Other services | 1992 |
| Inredo Oy | Professional & scientific | 2010 |
| Insinööritoimisto Ismo Lindberg Oy | Wholesale & retail | 2007 |
| Insinööritoimisto TaTe Oy | Professional & scientific | 2017 |
| Interim Oy | Transport & logistics | 1987 |
| Ironbeard Group Oy | Real estate | 2020 |
| IsoRatas Oy | Information & communication | 2016 |
| J Kangasaho Oy | Other services | 2000 |
| J. Kuukkanen Oy | Wholesale & retail | 2015 |
| J. Leino Systems Oy | Manufacturing | 1996 |
| JAMA Consulting Oy | Financial services | 2020 |
| JF Rakennus Oy | Construction | 2021 |
| JH-Project Avoin yhtiö | Manufacturing | 1987 |
| JJ-Seulonta Oy | Construction | 2017 |
| JL Investments Oy | Real estate | 2024 |
| JM-Työkalu Oy | Manufacturing | 1996 |
| JP ProInvest Oy | Financial services | 2025 |
| JS Vakuutuspalvelu Oy | Financial services | 2022 |
| Js-Kattotyö Ky | Construction | 2004 |
| JS-Purku Oy | Construction | 2014 |
| JS-Rakennuspalvelut Oy | Construction | 2021 |
| JSM-Invest Oy | Real estate | 2020 |
| JV Auto Works Oy | Other services | 2021 |
| Jaripa Oy | Professional & scientific | 2022 |
| Jetan Kauneus- ja hevospalvelut Ky | Other services | 2015 |
| John Crane Safematic Oy | Manufacturing | 1997 |
| Jouni Seriola Ky | Other services | 1997 |
| Juhan Hoitava Hieronta Ky | Health & social care | 2015 |
| Jyrvire Oy | Health & social care | 2016 |
| Jyväs-Seudun Kivityöpalvelu Oy | Construction | 2020 |
| Jyväs-Urakointi Oy | Construction | 2006 |
| Jyväskylän Autoagentit Oy | Wholesale & retail | 2009 |
| Jyväskylän Sähköasennus Oy | Construction | 2025 |
| Jyväslumi Oy | Arts & recreation | 2010 |
| Jyväsravintolat Oy | Hospitality | 2003 |
| Jyvässeudun Pulverimaalaamo Oy | Manufacturing | 2008 |
| Jämsänkosken Pesula JTH Oy | Other services | 2010 |
| K & T Lehtonen Oy | Wholesale & retail | 2007 |
| K-S Autodetailing Oy | Other services | 2025 |
| K-S Autopalvelu Oy | Wholesale & retail | 2017 |
| K-S Laatutalot Oy | Construction | 2011 |
| Kebabrobotics Suomi OY | Wholesale & retail | 2025 |
| KM Detailing Oy | Other services | 2025 |
| KMMK Design Shop Oy | Wholesale & retail | 2026 |
| KS Eliittieristys Oy | Construction | 2023 |
| KTPA Oy | Financial services | 2024 |
| KTR-Invest Oy | Financial services | 2014 |
| Kalliola La Land Oy | Professional & scientific | 2022 |
| Kampaamo Hinni Oy | Other services | 2019 |
| Kaptah Oy | Construction | 2020 |
| Kassa Invest Oy | Real estate | 2026 |
| Kasvu Arena Oy | Professional & scientific | 2016 |
| Katika Oy | Health & social care | 2022 |
| Kauneuspalvelut Vilander Oy | Other services | 2022 |
| Kehitysosasto Oy | Information & communication | 2019 |
| Keidas Immersion Solutions Oy | Professional & scientific | 2021 |
| Keisi Oy | Construction | 2006 |
| Keski-Suomen Profiili Oy | Manufacturing | 2005 |
| Keski-Suomen Putkistohuolto Oy | Water & waste | 2007 |
| Keski-Suomen Tasoite Oy | Construction | 1990 |
| Keski-Suomen Yrityskiinteistöt Oy | Real estate | 2020 |
| Keskijarvi Invest Oy | Real estate | 2017 |
| Kiinteistö Oy Arvomerkki | Real estate | 2022 |
| Kiinteistö Oy Autotalon Yrityspuisto | Real estate | 2007 |
| Kiinteistö Oy Eteläportti | Real estate | 2016 |
| Kiinteistö Oy Jaurasranta | Real estate | 1998 |
| Kiinteistö Oy Jyväskylän Kiilatie 2 | Real estate | 2005 |
| Kiinteistö Oy Korpikiinteistöt | Real estate | 2016 |
| Kiinteistö Oy Laatumerkki | Real estate | 2022 |
| Kiinteistö Oy Muuramen Moreeni | Real estate | 1990 |
| Kiinteistö Oy Muuramen Nokka | Real estate | 1995 |
| Kiinteistö Oy Muuramen Punasillantie 32 | Real estate | 2015 |
| Kiinteistö Oy Muuramen Ratastie 12 | Real estate | 1989 |
| Kiinteistö Oy Muuramen Ratastie 14 | Real estate | 1999 |