| A. Nikkanen Oy | Construction | 2025 |
| AX-Design Oy | Construction | 2010 |
| Ab Åker-Lind Oy | Transport & logistics | 2017 |
| Agorama Oy | Wholesale & retail | 2020 |
| Antennihuolto Keisala Oy | Construction | 1990 |
| Arrow Racing Team, avoin yhtiö | Arts & recreation | 1998 |
| Asirac Oy | Other services | 2022 |
| Automint Oy | Other services | 2021 |
| BKV Kiinteistöt Oy | Construction | 2018 |
| Birkmann Clinic Oy | Professional & scientific | 2010 |
| Bjorkkulla Oy | Administrative & support | 2008 |
| Broadtein Oy | Manufacturing | 2020 |
| Bruce Oy Myrskylä | Transport & logistics | 2013 |
| CreditCaravans Oy | Administrative & support | 2021 |
| Durasein Finland Oy | Manufacturing | 2020 |
| Eagle Sport Oy | Wholesale & retail | 2019 |
| EduSteps Oy | Education | 2016 |
| Erja Räty Ky | Manufacturing | 1986 |
| Flamboyant Oy | Administrative & support | 2018 |
| Full Power Production Ky | Professional & scientific | 2014 |
| Hamppu Harvest Oy | Agriculture & fishing | 2020 |
| Has Hus Avoin Yhtiö | Hospitality | 2018 |
| Hitsaus ja rakennuspalvelu Kuusela Oy | Construction | 2021 |
| Hunajasirkus oy | Agriculture & fishing | 2014 |
| JD Tech Oy | Other services | 2023 |
| JKH-Palvelu Oy | Agriculture & fishing | 2024 |
| JPK Projektipalvelut Oy | Construction | 2026 |
| Jaxo Oy | Construction | 2018 |
| Jääpuikkonen Oy | Manufacturing | 1989 |
| Kahvila-Ravintola Myrskytähti OY | Hospitality | 2007 |
| KBH Timber Oy | Agriculture & fishing | 2026 |
| KORCO-Media Oy | Information & communication | 2019 |
| Kb Bjarne Bergman Ky | Mining & quarrying | 1987 |
| Keskimaan Maanparannus Oy | Construction | 2026 |
| Kielo-Tuote Ky | Wholesale & retail | 1980 |
| Kiinteistöhuolto Valpas Oy | Administrative & support | 2020 |
| Killen Autokorjaamo Oy | Other services | 2018 |
| Kohu Group Oy | Manufacturing | 2023 |
| Konetyö Almark Oy | Construction | 2023 |
| Koneyhtymä Blomqvist B & M | Agriculture & fishing | 1983 |
| Korjaamo Metso Oy | Other services | 2021 |
| Korpikulta Oy | Wholesale & retail | 2018 |
| Kotivelhot OY | Administrative & support | 2020 |
| Koukjärven höyläämö Oy | Manufacturing | 2021 |
| Kuljetus ja Maanrakennus Sjölund Oy | Construction | 2022 |
| Kuljetus-Högström Oy | Transport & logistics | 1996 |
| Lakiasiaintoimisto Aira Sevon Ky | Professional & scientific | 1995 |
| Louhinta Lampi Oy | Manufacturing | 1994 |
| Luonnonkivi Ky P. Iivarinen | Mining & quarrying | 1983 |
| Maa-Markus Oy | Construction | 2020 |
| Maanrakennus Tallsten Oy Ab | Construction | 2024 |
| Maaurakointi R. Broman Oy | Construction | 2006 |
| Manner-Kuljetus Oy | Transport & logistics | 1987 |
| Matti Viren Oy | Mining & quarrying | 2015 |
| Merigroup Oy | Real estate | 2017 |
| Metsäbosc Oy | Agriculture & fishing | 2022 |
| Mikko Häkkinen Oy | Administrative & support | 1995 |
| Mionki Oy | Professional & scientific | 2002 |
| Myrskylyhty Oy | Real estate | 1949 |
| Myrskylä Fitness-Team Ky | Arts & recreation | 1996 |
| Myrskylän Autokorjaamo Oy | Other services | 2025 |
| Myrskylän Koneasema Oy | Real estate | 1997 |
| Myrskylän Kyllästyspalvelu Ky | Manufacturing | 1987 |
| Myrskylän Perhekoti Lupaus Oy | Health & social care | 2007 |
| Myrskylän Savu Oy | Manufacturing | 2011 |
| Myrskylän Sähkö Oy | Construction | 1987 |
| Myrskylän Säästöpankki | Financial services | 1919 |
| NS Schneider Oy | Information & communication | 2019 |
| Neorock Oy | Professional & scientific | 2010 |
| Nina Fashion Ky | Wholesale & retail | 1998 |
| Nordic Incoming Oy | Other services | 2019 |
| Nordic repair & maintenance service Oy | Wholesale & retail | 2021 |
| OPM Sähkö Oy | Construction | 2023 |
| OY High Chaparral AB | Real estate | 2006 |
| Oy Art-Pak Ab | Manufacturing | 1987 |
| Oy MMT-Palvelu Ab | Professional & scientific | 2011 |
| Oy Uudenmaan Siivousurakointi Ab | Administrative & support | 1998 |
| P. Jordberg Ky | Construction | 2003 |
| Petria OY | Construction | 2008 |
| PP Hallit Oy | Real estate | 2020 |
| Pakilan kaivin Oy | Manufacturing | 2014 |
| Pepe Pellikka Ky | Manufacturing | 1984 |
| Pepex Oy | Wholesale & retail | 2004 |
| Pouta Helmi Oy | Professional & scientific | 2021 |
| RSP Sofia Oy | Wholesale & retail | 1995 |
| Rakennusliike J & M Oy | Construction | 2011 |
| Ruined Films osk | Information & communication | 2016 |
| Rölli Forest Trans Ky | Transport & logistics | 2008 |
| SavuRanta Oy | Manufacturing | 1988 |
| SisUkko Oy | Professional & scientific | 2017 |
| Suomen Eläintuhkaus Oy | Other services | 1988 |
| Sähköasennus E. Ronkainen Oy | Construction | 2003 |
| Taksi ZAFAR Oy | Transport & logistics | 2020 |
| Tattari Progress Oy | Real estate | 2026 |
| Teho-Saharinen Ky | Construction | 2020 |
| Tero Pöllänen Oy | Manufacturing | 2016 |
| Trans-Laakso Ky | Transport & logistics | 2006 |
| Tuulie Oy | Professional & scientific | 2024 |
| Tångin Sora Oy | Mining & quarrying | 2008 |
| UBeauty Oy | Other services | 2019 |