| Peltitila Oy | Professional & scientific | 2026 |
| Penmar Invest Oy | Real estate | 2017 |
| Perhekoti Arki Oy | Health & social care | 2018 |
| Perhekoti Kila avoin yhtiö | Health & social care | 2013 |
| Perkkiön Taimi Kommandiittiyhtiö | Agriculture & fishing | 1987 |
| Plus-Huoltopalvelut Oy | Administrative & support | 2017 |
| Pohjolan Prosessilaite Oy | Wholesale & retail | 2022 |
| Prolix Oy | Wholesale & retail | 1996 |
| Purku- ja timanttityöt All In Oy | Construction | 2024 |
| PuuTila Oy | Agriculture & fishing | 2014 |
| Puuparturit Oy | Administrative & support | 2025 |
| Puutyöliike Silvan avoin yhtiö | Construction | 2022 |
| Pyhärannan Monipalvelu Oy | Construction | 2016 |
| RKL Jouko Rantanen Oy | Construction | 2007 |
| Raision Oma Piha Oy | Construction | 2007 |
| Rakenne-Kylänpää Oy | Construction | 2011 |
| Rakennus Keppola Oy | Construction | 2003 |
| Rakennus-Kylänpää Oy | Construction | 1991 |
| Rakennuspalvelu M. Hurme Oy | Construction | 2018 |
| Rakennuspalvelu Tähtinen Oy | Construction | 2018 |
| Rannikon Kala&Pyydys Oy | Agriculture & fishing | 2024 |
| Raukkaankoski Oy | Wholesale & retail | 1993 |
| Rauniontila Oy | Agriculture & fishing | 2022 |
| Rauta-Apaja Oy | Wholesale & retail | 2015 |
| Rawnice oy | Wholesale & retail | 2026 |
| Remonttipalvelu Lahnalammi Oy | Construction | 2020 |
| Rento Autopalvelut Oy | Other services | 2020 |
| Ristimäki Agro Oy | Agriculture & fishing | 2025 |
| Rouhiaisen Kivi Oy | Manufacturing | 1989 |
| Ruoho Capital Oy | Financial services | 2025 |
| Ruskone Oy | Wholesale & retail | 2003 |
| S&S Kylänpää Oy | Agriculture & fishing | 2013 |
| S. Laaksonen Consulting Oy | Administrative & support | 2021 |
| S.V. Timantti Oy | Construction | 2020 |
| SK Korjaamopalvelut Oy | Other services | 2023 |
| SL-Rakentaja Oy | Construction | 2024 |
| ST-Sijoitus Oy | Real estate | 1989 |
| Salices Oy | Construction | 2020 |
| Salmela Group Oy | Wholesale & retail | 2021 |
| Salmi-Yhtiöt Oy | Construction | 2004 |
| Saminna Oy | Professional & scientific | 2025 |
| Satalakia Oy | Professional & scientific | 2026 |
| Sijoituspointti Oy | Financial services | 2011 |
| SipeK Oy | Administrative & support | 2026 |
| Sisustus Mainio Oy | Wholesale & retail | 2018 |
| Steel Master Finland Oy | Manufacturing | 1995 |
| Steel Master Marine Oy | Manufacturing | 2014 |
| Suomen haitta-ainetutkimus Oy | Professional & scientific | 2019 |
| Suunnittelutoimisto Tuova Oy | Professional & scientific | 2009 |
| Sähkö Fourtech Oy | Construction | 2016 |
| Sähkö-Oskari Oy | Construction | 2021 |
| Sähkösuvanto Oy | Wholesale & retail | 1994 |
| TA Taloasennus Oy | Construction | 2015 |
| TLR-Eristys Lahti Oy | Construction | 1993 |
| TML Entertainment oy | Arts & recreation | 2025 |
| TP Mikkonen Oy | Manufacturing | 2007 |
| TT Sales Oy | Financial services | 2021 |
| Taksi T & M Väre Oy | Transport & logistics | 2008 |
| Taksiliikenne Syren & Muurama Oy | Transport & logistics | 2014 |
| Taloushallintopalvelut Poveria Oy | Professional & scientific | 2016 |
| Tasoite ja Rappaus R. Haapala Oy | Construction | 1998 |
| Team Mahla Oy | Construction | 2014 |
| Tech Tricks Oy | Information & communication | 2022 |
| Teho-Turve Oy | Mining & quarrying | 1975 |
| Teki-Trans Oy | Transport & logistics | 2007 |
| Terapia- ja perhepalvelu Valkoinen Kirahvi Oy | Health & social care | 2024 |
| Tili-Haukat Oy | Professional & scientific | 2021 |
| Tilitoimisto Malva Oy | Professional & scientific | 2026 |
| Timeka Finland Oy | Financial services | 2022 |
| Timeka Oy | Manufacturing | 1999 |
| Tuoretila Mäkelä Oy | Agriculture & fishing | 1999 |
| Turun maalämpötekniikka Oy | Construction | 2005 |
| Turvasana Oy | Arts & recreation | 2025 |
| Tähti Group Oy | Financial services | 2023 |
| Ukurmäen Kone Oy | Wholesale & retail | 2021 |
| Urpicom Oy | Financial services | 2024 |
| Ursa Major OSK | Real estate | 2014 |
| V-Assets Oy | Information & communication | 2026 |
| V-J Urakointi Oy | Agriculture & fishing | 2025 |
| V-S Laatutarra Oy | Manufacturing | 1988 |
| VIV Solutions Oy | Professional & scientific | 2025 |
| VL-Laaturakenne Oy | Construction | 2011 |
| VSL Kuljetus Oy | Transport & logistics | 1998 |
| VST-Works Oy | Wholesale & retail | 1999 |
| Vahtera Rakennus Oy | Construction | 2025 |
| Vainio Kiinteistö Group Oy | Real estate | 2014 |
| Vakuutuspalvelu Tero Tamminen Oy | Financial services | 2019 |
| Valmennus Hulivili Oy | Arts & recreation | 2021 |
| Varajemma Oy | Wholesale & retail | 2013 |
| Varsinais-Suomen Konetarvike Oy | Wholesale & retail | 1996 |
| Varsinais-Suomen Lämpötekniikka Oy | Construction | 2008 |
| Varsinais-Suomen Pienkone ja Huolto Oy | Wholesale & retail | 1995 |
| Vekkuli Production Oy | Wholesale & retail | 2010 |
| Veljekset Heino Oy | Agriculture & fishing | 2018 |
| Veraisen Leipomo Oy | Manufacturing | 1984 |
| Veraisen Sora Oy | Mining & quarrying | 1978 |
| Veskun Pora Oy | Wholesale & retail | 2008 |
| Vestitus Oy | Wholesale & retail | 2016 |
| ViaFascia Oy | Health & social care | 2020 |
| Vihka Oy | Construction | 2020 |