| 2Crazy Oy | Hospitality | 2025 |
| 2Lazy Oy | Administrative & support | 2020 |
| 33team Oy | Transport & logistics | 2012 |
| A & M Foods Oy | Hospitality | 2018 |
| A. Turkki Oy | Construction | 2017 |
| A1 Kiinteistöt Oy | Real estate | 2012 |
| A1 Trading Oy | Wholesale & retail | 1988 |
| ACS Engineering Oy | Professional & scientific | 1996 |
| Aga OY | Hospitality | 2023 |
| AH Konehuolto Oy | Manufacturing | 2024 |
| AIN Works Oy | Wholesale & retail | 2010 |
| AJ Röman Oy | Transport & logistics | 1999 |
| AJ-Metalli Oy | Wholesale & retail | 2005 |
| AK Laatuverkot Oy | Professional & scientific | 2008 |
| ARC Creative Oy | Professional & scientific | 2025 |
| Asennuspalvelu Viitanen OY | Construction | 2009 |
| Aawee Oy | Wholesale & retail | 2003 |
| Abeona Ky | Administrative & support | 2007 |
| Administer Oy Jämsä | Professional & scientific | 1990 |
| Akimtrannel Oy | Administrative & support | 1998 |
| Ala-Lepolan Omenatarha Oy | Agriculture & fishing | 2023 |
| Alhon Huopatehdas Oy | Manufacturing | 1998 |
| Alhon Niskala Oy | Hospitality | 2025 |
| Alliz Oy | Professional & scientific | 2022 |
| Aloha Spirit Finland Oy | Arts & recreation | 2017 |
| Ania-Care Oy | Health & social care | 2017 |
| Anita Koponen Design Oy | Professional & scientific | 2014 |
| Annen Pikkolo Oy | Real estate | 2005 |
| Anri puheterapia Oy | Health & social care | 2024 |
| Aquila Automotive Finland Oy | Wholesale & retail | 2018 |
| Araqua Oy | Information & communication | 1995 |
| Ari ja Olavi Järvinen Oy | Construction | 1982 |
| Artio Oy | Information & communication | 1994 |
| Asennuspalvelu Vanhatalo Oy | Construction | 2025 |
| Asianajotoimisto Sirén, Kallio & Koivisto Oy | Professional & scientific | 2006 |
| Atlas-Trading Oy | Financial services | 1987 |
| AutoSeppola Oy | Wholesale & retail | 2025 |
| Autohuolto Ari Anttila Oy | Other services | 2004 |
| Auvilan Tallikiinteistöt Oy | Real estate | 2011 |
| Avoin Yhtiö Feelgood Factor Band | Professional & scientific | 2009 |
| Avoin yhtiö Juokslahden Kartanon Kone | | 1990 |
| Avoin yhtiö Lounaskahvila Vehnäleipä | Hospitality | 2002 |
| Avoin yhtiö M & S Ylikulju | Construction | 1989 |
| Avoin yhtiö Palvelu Pari | Administrative & support | 2005 |
| Betoni-Sampo Oy | Manufacturing | 1968 |
| Body Recovery System Oy | Other services | 2022 |
| Bonago Oy | Agriculture & fishing | 2020 |
| Cadline Oy | Professional & scientific | 1987 |
| Civoriana Vet Oy | Other services | 2025 |
| Deadsnow Oy | Wholesale & retail | 2015 |
| Door to Beautique Oy | Other services | 2025 |
| EAC Tekniikka Oy | Professional & scientific | 2015 |
| EM-Murskausapu Oy | Construction | 2008 |
| Eepos Group Oy | Hospitality | 2011 |
| Elintarvike Suunnittelu Tuotanto ja Markkinointi Luonto-ShopOy | Wholesale & retail | 1990 |
| Elolaiva Oy | Real estate | 1998 |
| Elonen Oy Leipomo | Manufacturing | 1974 |
| Elosen Konditoria Oy | Hospitality | 1987 |
| Eläinklinikka Anni Törhönen Oy | Professional & scientific | 2018 |
| Eurasia Ateriapalvelut Oy | Hospitality | 2015 |
| FE3NIX Oy | Financial services | 2024 |
| Finnish Cheese Company Oy | Wholesale & retail | 2002 |
| Finnvolt Oy | Manufacturing | 2017 |
| Fintion Oy | Professional & scientific | 2023 |
| Fomes Oy | Education | 2023 |
| Forredos Oy | Health & social care | 1995 |
| Fraxinus Oy | Agriculture & fishing | 2013 |
| Freight Car Finland Oy | Manufacturing | 2024 |
| Go Pizza Ky | Hospitality | 1991 |
| Golden Teppo Oy | Wholesale & retail | 1997 |
| H. Rantanen Oy | Construction | 2019 |
| HAVUX Oy | Construction | 2019 |
| HF Investment Oy | Real estate | 2019 |
| HIMOSwing Oy | Arts & recreation | 2009 |
| HSV Partners Oy | Other services | 2018 |
| HSV group Oy | Other services | 2012 |
| HT-Pros Oy | Administrative & support | 2025 |
| Haggren Yhtiöt Oy | Wholesale & retail | 2020 |
| Haggrén Maa ja Vesi Oy | Administrative & support | 2011 |
| Haljala Oy | Arts & recreation | 2025 |
| Hannu Salonen Ympäristöpalvelut Oy | Professional & scientific | 1990 |
| Hannu Tiiri oy | Manufacturing | 2014 |
| Harvest Moon Capital Oy | Financial services | 2017 |
| Hebeira Oy | Education | 1997 |
| Heiko Group Oy | Wholesale & retail | 2026 |
| Helpro Oy | Professional & scientific | 2020 |
| Helpro Terveysasemat Oy | Health & social care | 2025 |
| HerCo Oy | Administrative & support | 2026 |
| Hietatilit Oy | Professional & scientific | 2015 |
| Hiihtokoulu Himoset Oy | Arts & recreation | 1990 |
| Hiisi Hill Oy | Wholesale & retail | 2019 |
| HimoSali Oy | Arts & recreation | 2023 |
| Himoksen Aluetaksi Oy | Transport & logistics | 2018 |
| Himoksen Lomalehto Oy | Real estate | 2006 |
| Himos Mökkipalvelut Oy | Administrative & support | 1990 |
| Himos Rakennus Oy | Real estate | 2020 |
| Himos Resort Oy | Real estate | 2008 |
| Himos Safarit Oy | Hospitality | 2012 |
| Himos Ski & Golf Chalets Oy | Wholesale & retail | 1999 |
| Himos henkilöstövuokraus Oy | Administrative & support | 2025 |