| P Porri Oy | Wholesale & retail | 1990 |
| Pearl Invest Oy | Financial services | 2026 |
| Perecolor Oy | Manufacturing | 2001 |
| Perhekoti Hippuliina Oy | Health & social care | 2024 |
| Pertti Sällilä Oy | Wholesale & retail | 1990 |
| Pohiranta Oy | Agriculture & fishing | 2013 |
| Polartherm Group Oy | Professional & scientific | 2011 |
| Polartherm Oy | Manufacturing | 1997 |
| Porin Helmikiinteistöt Oy | Real estate | 2008 |
| Potero Standard Oy | Wholesale & retail | 2026 |
| Prima Takoja Oy | Real estate | 2023 |
| Priva Gym Oy | Arts & recreation | 2026 |
| Prosessiturva Oy | Construction | 2017 |
| Rakennus Vesa Heikkilä OY | Construction | 2000 |
| Rakennus & Saneeraus Visala Oy | Construction | 2021 |
| Rakennusliike Haapa-aho Ky | Construction | 2006 |
| Rakennussuunnittelu Jalonen Oy | Professional & scientific | 1990 |
| Rakennustekniikka Seppä Oy | Construction | 2013 |
| Ratsastus Granifiq Oy | Education | 2016 |
| Reav Oy | Wholesale & retail | 2017 |
| RenoArt Oy | Construction | 2023 |
| Rishi Oy | Education | 2010 |
| Rusava Oy | Real estate | 2018 |
| Sankora OY | Construction | 2016 |
| Sosiaalipalvelu Takala OY | Health & social care | 2005 |
| SSP-Sinitaivas Ky | Wholesale & retail | 2011 |
| Salario Oy | Hospitality | 1995 |
| Saneeraus- ja asennuspalvelu 100 Oy | Construction | 2015 |
| Sata Solar Oy | Construction | 2018 |
| Sata-San Oy | Construction | 1989 |
| SataBest Oy | Professional & scientific | 2017 |
| Satabitti Oy | Information & communication | 1995 |
| Satainsinöörit Oy | Construction | 2021 |
| Satakunnan AJ Palvelut Oy | Construction | 2016 |
| Satakunnan Monipalvelu Kommandiittiyhtiö | Construction | 2006 |
| Satakunnan Rakennussuunnittelu Oy | Professional & scientific | 2005 |
| Satakunnan Sähkötalo Oy | Construction | 2014 |
| Satasivellin Oy | Construction | 2013 |
| Sauna-Eurox Oy | Manufacturing | 1991 |
| Saunapojat Oy | Construction | 2023 |
| Senewa LS Oy | Professional & scientific | 2014 |
| Sepän Satama Oy | Other services | 2020 |
| SkyOps Oy | Administrative & support | 2026 |
| Sol Omnibus Lucet Oy | Financial services | 2014 |
| Soul Sisters Catering Avoin yhtiö | Hospitality | 2017 |
| SoulFrame Ky | Health & social care | 2014 |
| Suomen Vahva-Katto Oy | Construction | 2013 |
| Suomen ikkunaremontit Oy | Construction | 2016 |
| SurgeryFactory Oy | Manufacturing | 2022 |
| T.Hiukka Ky | Transport & logistics | 2006 |
| TCL Finland Oy | Education | 2005 |
| Tehnomet OY | Construction | 2010 |
| Tenable Oy | Other services | 1995 |
| Terapia ja hyvinvointipalvelu Auroosa Oy | Health & social care | 2012 |
| Troolari Sipi Oy | Agriculture & fishing | 2019 |
| Tröömin Group Oy | Hospitality | 2015 |
| Tulisiipinen Oy | Health & social care | 2024 |
| Unirekal Oy | Administrative & support | 2017 |
| Venatoris Oy | Professional & scientific | 2024 |
| W-Cult Oy | Manufacturing | 2015 |
| WiserWork Oy | Professional & scientific | 2026 |
| Yli-Nikkilä Yhtiöt Oy | Real estate | 2004 |
| Yolo Invest Oy | Real estate | 2020 |