| AG-Tekniikka Oy | Construction | 2026 |
| AJK-Q-Factor Oy | Professional & scientific | 2002 |
| ASBCOM Oy | Water & waste | 2018 |
| Aromaa Service Oy | Real estate | 2006 |
| Collective Apparel Oy | Wholesale & retail | 2024 |
| FinnPort Logistic Oy | Transport & logistics | 2018 |
| HTN Rakennus Ky | Construction | 2018 |
| Harjunpään huolto Oy | Manufacturing | 2022 |
| Harjunpään teräsrakenne Oy | Manufacturing | 2001 |
| Hertta-asunnot Oy | Real estate | 2024 |
| Hevi Rakennus Oy | Construction | 2023 |
| JZ Group Oy | Construction | 2022 |
| Kiinteistö Oy Harjunpään Teräsmäki | Real estate | 2007 |
| Kiviniemi Invest OY | Financial services | 2022 |
| KokemustenKautta Oy | Health & social care | 2023 |
| Koneurakointi Alamäki Oy | Agriculture & fishing | 1997 |
| Korjax Oy | Manufacturing | 2016 |
| Kuljetus Henry Nordlund Oy | Transport & logistics | 2021 |
| Lauha Living Oy | Professional & scientific | 2021 |
| Lähettipalvelu Porin Nopea Oy | Professional & scientific | 1993 |
| MVK Capital Oy | Financial services | 2023 |
| Mixedo Oy | Transport & logistics | 1993 |
| Niemen Terveys Oy | Health & social care | 2019 |
| Nokikarhu Oy | Administrative & support | 2023 |
| Opitti Oy | Education | 2019 |
| Oy Mikael Albrecht Ab | Construction | 2020 |
| Painotech Oy | Professional & scientific | 2024 |
| Peltisepänliike Tapio Ky | Construction | 2011 |
| Putkiviikari Oy | Construction | 1990 |
| RC Rajala Ky | Administrative & support | 2018 |
| Radiaattoritehdas Salomaa Oy | Manufacturing | 1983 |
| Rannikon Raskas Oy | Construction | 2014 |
| Rokasu Oy | Manufacturing | 2014 |
| Snackable Oy | Wholesale & retail | 2025 |
| Sorvaamo Kuusisto avoin yhtiö | Manufacturing | 2023 |
| Sunniemen Kartano Oy | Agriculture & fishing | 1992 |
| Supa Rakennus Oy | Professional & scientific | 2002 |
| Sähköpalvelu Viitanen Ky | Construction | 2024 |
| Tilateurastamo Vuorenmaa Oy | Manufacturing | 2024 |
| ToiMifix Oy | Other services | 2022 |
| Ulvilan Raaka-ainekeskus Oy | Transport & logistics | 2020 |
| Ulvilex Oy | Professional & scientific | 1991 |
| VK-Urakointi Oy | Transport & logistics | 2020 |
| Vopp Eye Oy | Health & social care | 1977 |
| Wilho Games Oy | Wholesale & retail | 2026 |
| Yasmin Josefina OY | Professional & scientific | 2019 |