| Kukka- ja puutarhakauppa Lillukka Ky | Wholesale & retail | 1986 |
| Kuljetus Erkku Oy | Transport & logistics | 1995 |
| Kuljetus Hulmi Oy | Transport & logistics | 1998 |
| Kuljetus Juha Mäkelä Oy | Transport & logistics | 2011 |
| Kuljetus Kuusisto Ky | Transport & logistics | 1986 |
| Kuljetus Sata Oy | Administrative & support | 2015 |
| Kuljetus T Mäenpää Oy | Transport & logistics | 2021 |
| Kuljetus Tomi Mattila Oy | Transport & logistics | 1998 |
| Kuljetus-Perkola Oy | Transport & logistics | 1984 |
| Kuljetusliike Kalevi Mäkitalo Oy | Transport & logistics | 1991 |
| Kuljetusliike Pietilä Oy | Transport & logistics | 1983 |
| Kuljetusliike R. Tuomola Ky | Transport & logistics | 1990 |
| Kuljetusliike Timo Tuomola Ky | Transport & logistics | 1995 |
| Kuljetuspalvelu Aaltonen & Reko Oy | Transport & logistics | 2010 |
| Kuntopankki Oy | Other services | 2017 |
| Kuricon Oy | Professional & scientific | 2019 |
| KuuKoi Oy | Real estate | 2014 |
| Köyliön Konepalvelu Oy | Mining & quarrying | 1995 |
| Köyliön-Säkylän Sähkö Oy | Energy | 1924 |
| LAKIME Oy | Professional & scientific | 2017 |
| LL Service Oy | Professional & scientific | 2025 |
| LVI-Asennus Koivisto Oy | Construction | 2016 |
| Lallin Voima OY | Energy | 1990 |
| Lapin Maria Oy | Manufacturing | 2009 |
| Lapsapp Ky | Professional & scientific | 2018 |
| Lauttaravintola Rauma Oy | Hospitality | 2017 |
| LentoLanta Oy | Agriculture & fishing | 2026 |
| Leo Erkkilä ja Pojat | Agriculture & fishing | 1981 |
| Liikenne Jarmo Kyllönen Oy | Transport & logistics | 2002 |
| Linja-autoliikenne A. Tuominen avoin yhtiö | Transport & logistics | 1998 |
| Luoves Oy | Real estate | 1997 |
| Lännen Broilerpalvelu Oy | Financial services | 1996 |
| Lännen Mattohuolto LMH Oy | Other services | 1994 |
| Lännen Puupalvelu Oy | Wholesale & retail | 1999 |
| Lännen Sokeri Oy | Wholesale & retail | 1989 |
| Länsi-Kalkkuna Oy | Manufacturing | 2006 |
| Makbes OY | Transport & logistics | 1994 |
| MKH-Rakennustyö Oy | Construction | 2006 |
| Maalausliike I. Lampiniemi Oy | Construction | 2001 |
| Maanrakennus M. Koivisto Oy | Construction | 1990 |
| Maanrakennus U. Salminen Ky | Construction | 1984 |
| ManiNet Oy | Wholesale & retail | 2003 |
| MarHei Oy | Agriculture & fishing | 2014 |
| Matro Oy | Wholesale & retail | 1992 |
| Merit Line Audit Oy | Professional & scientific | 1993 |
| Merit Line Consulting Oy | Professional & scientific | 1993 |
| Merit Line Oy | Professional & scientific | 2008 |
| Merit Line Tax Oy | Professional & scientific | 1993 |
| Merkvil Oy | Manufacturing | 1991 |
| Mia-Hermanni Oy | Real estate | 2020 |
| Milform Oy | Wholesale & retail | 2000 |
| MiraiMind Oy | Professional & scientific | 2024 |
| Mäkitalo In West Oy | Construction | 2019 |
| Mänty-Vest Oy | Wholesale & retail | 2018 |
| Neljäsputti Oy | Real estate | 2002 |
| Nesamaja OY | Real estate | 2018 |
| Newran Oy | Hospitality | 2007 |
| Next Generation Physique Oy | Education | 2020 |
| Nice Mittaus Oy | Professional & scientific | 2019 |
| Nonno-Import Ky | Wholesale & retail | 1985 |
| Nordic Herbs Oy | Agriculture & fishing | 2015 |
| Nummioja Trading Oy | Arts & recreation | 2024 |
| Nurminen Invest Oy | Financial services | 2012 |
| Osuuskunta Juureva | Construction | 2020 |
| Oy Eisman Ab | Professional & scientific | 2016 |
| P & H Lastauspalvelu Oy | Transport & logistics | 2002 |
| Peltityö Ranta Ja Kumpp. | Construction | 1979 |
| PST-Kuljetus avoin yhtiö | Transport & logistics | 2006 |
| Paassillan Hinaus Oy | Wholesale & retail | 2000 |
| Pajatar Oy | Wholesale & retail | 1993 |
| Pakkasvakka Oy | Transport & logistics | 1985 |
| PepeTek Oy | Construction | 2020 |
| Pihlavirta Oy | Construction | 2017 |
| Pohjaranta Oy | Manufacturing | 1992 |
| Propax Agro Oy | Wholesale & retail | 2003 |
| Psykoterapia ja työnohjaus Sentido Oy | Health & social care | 2023 |
| Pyhäjärven laituriosuuskunta | Arts & recreation | 2003 |
| Pyhäjärviseudun Jäähalli Oy Säkylä | Arts & recreation | 1995 |
| Pyhäjärviseudun Laatupalvelut Oy | Construction | 2021 |
| Q-Team Oy | Professional & scientific | 1993 |
| RA Enterprise Oy | Real estate | 2020 |
| RAHTI-REKO ky | Transport & logistics | 2008 |
| RM-Kiinteistöt Oy | Real estate | 2007 |
| Rakennuspalvelu Markku Laaksovirta Oy | Construction | 1991 |
| Rakennuspalvelu Pihlava Ky | Construction | 2015 |
| Raskinvalkama Oy | Hospitality | 2025 |
| Rauhanmajan Arkiapu -työosuuskunta | Health & social care | 2008 |
| Ravintola Muikku Oy | Hospitality | 2021 |
| Ravintola OR-ER Oy | Hospitality | 2010 |
| Roiske Oy | Wholesale & retail | 2016 |
| Ruukin Luontopalvelut Oy | Professional & scientific | 2019 |
| SJS Kiinteistöt Oy | Real estate | 2006 |
| SSP-Stainles Steel Production Oy | Professional & scientific | 2001 |
| Sairaankuljetus Kyllönen Oy | Health & social care | 2002 |
| Samikia Oy | Real estate | 2016 |
| Sanna Tuomola Oy | Financial services | 2022 |
| Sataharjun Osuuspankki | Financial services | 1927 |
| Satalogistics Oy | Transport & logistics | 2012 |
| Saula Oy | Agriculture & fishing | 2003 |
| Saulan Tila Oy | Agriculture & fishing | 2016 |