| Hopeapirtti Oy | Financial services | 2024 |
| Huhta-kiinteistöt Oy | Real estate | 2019 |
| Huippu Group Oy | Wholesale & retail | 2007 |
| Huippusiivous kotipalvelut Oy | Administrative & support | 2021 |
| Huoltoliike Syrjänen Oy | Manufacturing | 2021 |
| Hyljesaari Oy | Financial services | 2025 |
| Hype Siivous Oy | Administrative & support | 2024 |
| IRD-Products Oy | Manufacturing | 2008 |
| Iin Kaarikiinteistöt Oy | Real estate | 2004 |
| Ilo Vauvaperhepalvelut Oy | Health & social care | 2023 |
| Imago+ Oy | Professional & scientific | 2009 |
| Insinööritoimisto West Coast Oy | Professional & scientific | 2008 |
| Instory Oy | Health & social care | 2009 |
| Isännöinti Lampila Oy | Professional & scientific | 1993 |
| It Burns Oy | Professional & scientific | 2019 |
| J.Paavola Oy | Construction | 2009 |
| JK Loka Oy | Water & waste | 2020 |
| JME Consulting Oy | Financial services | 2025 |
| JMS company Oy | Wholesale & retail | 2024 |
| JR Burger Oy | Hospitality | 2019 |
| JS Engineering Oy | Professional & scientific | 2016 |
| JS Kiinteistöpalvelu Oy | Real estate | 2017 |
| JSA-Systems Oy | Professional & scientific | 2003 |
| JTM Works OY | Construction | 2025 |
| Jarimari Oy | Wholesale & retail | 1989 |
| Jofin Consulting Oy | Professional & scientific | 2024 |
| Jokikylän Jokimutkan viemäriosuuskunta | Water & waste | 2007 |
| Joxin Oy | Real estate | 2019 |
| Ju-Ho-Mit Oy | Wholesale & retail | 1980 |
| JuSaSi Oy | Wholesale & retail | 2025 |
| Juhana Viljamaa FMX Oy | Arts & recreation | 2019 |
| Juhlahehku Designs Oy | Administrative & support | 2024 |
| Jukka Korpelin Oy | Transport & logistics | 2007 |
| Jukka Ruskola Oy | Real estate | 2009 |
| Julako Oy Ab | Financial services | 2026 |
| Junnun Autokoulu Oy | Education | 2026 |
| Juristiina Oy | Professional & scientific | 2022 |
| Jussila Group Oy | Construction | 1990 |
| K Nurkkala Oy | Construction | 1995 |
| KAIPIX Ky | Professional & scientific | 1990 |
| Keskinäinen Kiinteistöosakeyhtiö Vääräkäs OY | Real estate | 1989 |
| KK Shop OY | Professional & scientific | 2020 |
| Klasila Infra OY | Construction | 2024 |
| KM-Saneeraus Oy | Construction | 2021 |
| KMJ Kuljetus Oy | Transport & logistics | 1995 |
| KRPT Meriläinen Oy | Construction | 2025 |
| Kaasari Oy | Wholesale & retail | 2019 |
| Kahvihetki Oy | Manufacturing | 2020 |
| Kahvihuone Terttu Jukuri Ky | Hospitality | 2006 |
| Kaidis Oy | Construction | 1999 |
| Kairacon Oy | Real estate | 2020 |
| Kalusteveistäjät Kivilompolo Ky | | 1984 |
| Kantohanki Oy | Financial services | 2026 |
| Kantti Holding Oy | Financial services | 2022 |
| Kasvukumppanit Oy | Professional & scientific | 2025 |
| Kasvuntie Terttu Kuusela Ky | Education | 1999 |
| Kauneus Kidea Oy | Other services | 2022 |
| Keltainen Kolibri Ky | Wholesale & retail | 2020 |
| Kesonen & Hiltunen Oy | Wholesale & retail | 1993 |
| Kiinteistö Oy Haukiputaan Liikekeskus | Real estate | 2011 |
| Kiinteistö Oy Haukiputaan Verstasmutka | Real estate | 1993 |
| Kiinteistö Oy Iin Kenttäkulma | Real estate | 1982 |
| Kiinteistö Oy Kellonkulma | Real estate | 1988 |
| Kiinteistö Oy Kempele Rasivainiontie 6 | Real estate | 2016 |
| Kiinteistö Oy Revonkulma | Real estate | 1991 |
| Kiinteistö Oy Revonruusu | Real estate | 1989 |
| Kiinteistö Oy Rukan Voima | Real estate | 2024 |
| Kiinteistö Oy Unkelo | Real estate | 1978 |
| Kiinteistö Oy Vanha-Metsäniemi | Real estate | 1997 |
| Kimmo Joensuu Oy | Transport & logistics | 2018 |
| Kimmobiili Oy | Wholesale & retail | 2018 |
| King Bellion Beard Products Oy | Wholesale & retail | 2022 |
| Kipinä Invest Oy | Real estate | 2021 |
| Kojamopomot Oy | Real estate | 2024 |
| Konepalvelu RA-SA Oy | Construction | 2021 |
| Konetyö Eräjoki Oy | Construction | 2021 |
| Konetyö Paananen Oy | Construction | 2026 |
| Koneurakointi S. Finnig Oy | Construction | 2011 |
| Koneyhtymä Marttala Oy | Construction | 2008 |
| Korjaamomaailma Oy | Administrative & support | 2009 |
| Korpimäki Invest Oy | Real estate | 2011 |
| Koulutuspalvelut Sanna Wenström Oy | Education | 2023 |
| Kropsun Perhekoti Oy | Health & social care | 2000 |
| Kukka ja Hautauspalvelu Karjalainen Oy | Other services | 1997 |
| Kuljetus Jussi Kaakinen Ky | Transport & logistics | 2003 |
| Kuljetus Niskala Oy | Transport & logistics | 1992 |
| Kuljetusliike PU-VAP Oy | Transport & logistics | 1997 |
| KumiJussi Oy | Wholesale & retail | 2017 |
| Kurrelina Design avoin yhtiö | Professional & scientific | 2019 |
| Kylmäkomppania Oy | Wholesale & retail | 2014 |
| KäyttöKate Oy | Professional & scientific | 2023 |
| LBT Bonus Oy | Wholesale & retail | 1998 |
| Liir Avoin Yhtiö | Arts & recreation | 2012 |
| LVI-Virtaamat Oy | Construction | 2015 |
| Laatikainen Enterprises Oy | Information & communication | 2019 |
| Laatuvalajat Oy | Construction | 2019 |
| Land Brokers Oy | Real estate | 2019 |
| Lapinkettu Oy | Arts & recreation | 2021 |
| Lateralis Oy | Health & social care | 2008 |
| Lehtori Ruuskanen Oy | Education | 2020 |