| Alpo Mäensivu Oy | Transport & logistics | 1973 |
| Asennuspalvelu Koppi Oy | Manufacturing | 2016 |
| Auria Invest Oy | Financial services | 2025 |
| Auto- ja Konehuolto Jokinen Oy | Other services | 2025 |
| Auto-Optio Oy | Wholesale & retail | 1988 |
| Autocirc Autopalsta Oy | Wholesale & retail | 1969 |
| Automyynti M. Koivisto Ky | Wholesale & retail | 1989 |
| Bandit Suomi Oy | Wholesale & retail | 2010 |
| Barchetta Invest Oy | Wholesale & retail | 2024 |
| CALLIDA EST Oy | Professional & scientific | 2019 |
| Destanita Oy | Other services | 1998 |
| Domestrix Oy | Wholesale & retail | 1993 |
| Eco Energiacenter Oy Pori | Construction | 2015 |
| Erkkilän Puunkuljetus Ky | Agriculture & fishing | 1989 |
| FinSensus Oy | Professional & scientific | 2024 |
| Flotan Vesiosuuskunta | Water & waste | 1998 |
| Fower Equipment Oy | Manufacturing | 2022 |
| Geoasennus Oy | Construction | 2026 |
| HHRakenne Oy | Construction | 2023 |
| Huolto Ja Saneeraus Peltomaa OY | Wholesale & retail | 2006 |
| Hatanpää Oy | Manufacturing | 1988 |
| Huoltoveikot Oy | Manufacturing | 2020 |
| Hyötyrakenne Oy | Construction | 2025 |
| Igniware Oy | Professional & scientific | 2019 |
| Ingemari Oy | Wholesale & retail | 2018 |
| Insinööritoimisto Lavonen Oy | Professional & scientific | 2020 |
| JPK-Kuljetus Oy | Transport & logistics | 1994 |
| JR-Sepät Avoin yhtiö | Construction | 2009 |
| Jokimäki Service Oy | Professional & scientific | 2007 |
| Kaivonporaus Harri Peltomaa Oy | Construction | 2010 |
| Keskimatkat Oy | Administrative & support | 1994 |
| Kiinteistö Oy Muuntoasemantie 4 | Real estate | 1985 |
| Kiinteistö Oy Porin Työpajankatu 9 | Real estate | 2003 |
| Kilpäkki Oy | Hospitality | 2023 |
| Kolmivuoro Oy | Wholesale & retail | 2013 |
| Konehuolto Hakala Oy | Other services | 2018 |
| Korpholman Helmi Oy | Real estate | 2024 |
| Kuormaus ja kuljetus Jokisalo Ky | Construction | 1991 |
| Lapin Lumilomat Oy | Administrative & support | 2008 |
| Lepistö Milk Trans Oy | Transport & logistics | 2021 |
| Lucky Aki Advisor Oy | Professional & scientific | 2025 |
| Luonto & Matkailu Vuokraus Oy | Arts & recreation | 2025 |
| Lännen Konetyö Oy | Construction | 2023 |
| Länsinostot Oy | Construction | 1982 |
| Maanrakennus OY Viitanen & Viitanen | Construction | 2002 |
| MMK Ventures Oy | Financial services | 2026 |
| MO Group Oy | Real estate | 2017 |
| Maanrakennus Laurila Oy | Construction | 2009 |
| Marrocon Oy | Professional & scientific | 1991 |
| Milletel Oy | Professional & scientific | 2009 |
| Novacraft OY | Wholesale & retail | 2017 |
| Noormarkun Maansiirto Oy | Construction | 1997 |
| Oy Metallileikkaus Ab | Manufacturing | 1973 |
| Penni-Invest Oy | Professional & scientific | 2022 |
| Porin Asbesti-, Siivous- ja Rakennuspalvelu Oy | Water & waste | 1990 |
| Porin Jii-Tee Oy | Transport & logistics | 2008 |
| Porin Kone & Romu Oy | Manufacturing | 2020 |
| Porin P Painting Oy | Construction | 1988 |
| Prework Oy | Administrative & support | 2025 |
| Pro Investment Services Ruohola Ky | Financial services | 2001 |
| RT-Hallit Oy | Real estate | 1990 |
| Ranttiän Kone Oy | Other services | 1987 |
| Reijo Erkkilä Oy | Construction | 1993 |
| SRP-Forest Oy | Agriculture & fishing | 1998 |
| Satakunnan Lvi-huolto Oy | Construction | 2005 |
| Sorila Oy | Wholesale & retail | 2008 |
| Sähkö ja tekniikka Lohiranta Oy (STL) | Manufacturing | 2016 |
| SöörTech Oy | Construction | 2025 |
| Söörkiinteistöt Oy | Real estate | 2010 |
| Söörmarkun Rakennuspalvelu Oy | Construction | 2014 |
| Söörmarkun SRK Oy | Construction | 2016 |
| TN-moto Oy | Agriculture & fishing | 2000 |
| Tilausliikenne Pori Oy | Transport & logistics | 2013 |
| Tilitieto Puistonen avoin yhtiö | Professional & scientific | 1997 |
| Tuulivoimahuolto J.Lehti Oy | Manufacturing | 2015 |
| Westmet Oy | Manufacturing | 2012 |
| Woimahevosen taitotalli Oy | Arts & recreation | 2018 |
| Zilpa Oy | Education | 2024 |