| AJEK Capital Oy | Administrative & support | 2025 |
| Alloria Marketing Solutions Oy | Professional & scientific | 2025 |
| Cranium Oy | Construction | 2020 |
| Datasol Oy | Information & communication | 2024 |
| E. Lempiäinen Ky | Wholesale & retail | 2008 |
| Eagle Motorsport Marketing EMM Ky | Arts & recreation | 2004 |
| Elian-konsultointi Oy | Professional & scientific | 2002 |
| Event Marketing Finland Oy | Arts & recreation | 2020 |
| Haston Oy | Administrative & support | 2003 |
| Heinlahden Veistämö Oy | Manufacturing | 1981 |
| Hevossaaren Laituri Oy | Transport & logistics | 1995 |
| Hevossaaren vesiosuuskunta | Water & waste | 2012 |
| Insinööritoimisto Kotkaplan Ky | Professional & scientific | 1986 |
| J. Pajula Ky | Transport & logistics | 2008 |
| JK-Koneurakointi Oy | Construction | 2013 |
| Kaakon Hoiva Oy | Health & social care | 2018 |
| Kaakon LVI-Tekniikka Oy | Professional & scientific | 2022 |
| Kannan Oy | Health & social care | 2022 |
| Kiinteistö Oy Pyhtään Merituuli | Real estate | 1989 |
| Kotkan Kuormaus Eero ja Sakari Kiiski | Construction | 1977 |
| Kymen AI Oy | Professional & scientific | 2021 |
| Kymen Monirakenne Oy | Construction | 2008 |
| Kymen Nostokone Oy | Construction | 2020 |
| Kymen Rakennus & Kiinteistöpalvelut Ky | Construction | 2011 |
| Laama Holding Oy | Administrative & support | 2023 |
| Loopy Oy | Information & communication | 2015 |
| Maansiirtoliike Kotkan Kuormaus Oy | Construction | 1997 |
| MadPro Promotions avoin yhtiö | Arts & recreation | 2017 |
| Meri & Juoksu Oy | Education | 2011 |
| Mette's Way Oy | Arts & recreation | 2024 |
| Myyryn Sora ja Kuljetus Oy | Construction | 1970 |
| Nanoliini Oy | Hospitality | 2024 |
| Nordicomp Oy | Wholesale & retail | 2021 |
| O-Rep Oy | Professional & scientific | 2025 |
| Omasato Oy | Manufacturing | 2004 |
| PT Trading Oy | Wholesale & retail | 2011 |
| Pyhtään Pajamäki OY | Real estate | 2020 |
| Paperipallo Oy | Arts & recreation | 2007 |
| Perhekoti Sammalkoto Oy | Health & social care | 2012 |
| PirtElina Oy | Arts & recreation | 2025 |
| Posimo Oy | Wholesale & retail | 2014 |
| Preeda Group Oy | Construction | 2025 |
| Puusepänliike L Liimatainen Ky | Manufacturing | 1982 |
| Pyhtech Oy | Professional & scientific | 2021 |
| Pyhtään Palvelutaksi Ky | Transport & logistics | 2010 |
| Pyhtään Pilke avoin yhtiö | Wholesale & retail | 2011 |
| Pyhtään Romu Ky | Wholesale & retail | 1982 |
| Pyhtään urheilu- ja liikuntakeskus Oy | Arts & recreation | 2010 |
| Rakennustoimisto J.Lehto-Building Ky | Construction | 2007 |
| Remonttipalvelu Smith Oy | Construction | 2020 |
| Svanvik OY | Administrative & support | 2021 |
| Scandinavian Arabians U.Turtiainen Oy | Wholesale & retail | 1989 |
| Taksikuljetus SamiLeif Oy | Transport & logistics | 2003 |
| Very Important Company Finland Oy | Professional & scientific | 2021 |
| Visaki Oy | Construction | 2019 |
| Vision Build Partners Oy | Financial services | 2025 |
| Väylä Holding Oy | Financial services | 2020 |