| Probear OY | Transport & logistics | 2002 |
| Pajalanverstas Oy | Real estate | 1976 |
| Palomäen tila Oy | Agriculture & fishing | 2021 |
| Partelan Maa- ja Metsätyö Oy | Agriculture & fishing | 2021 |
| Partelan Porsas Oy | Agriculture & fishing | 2002 |
| Paukkeri Consulting Oy | Professional & scientific | 2025 |
| Pelti-Salmi Oy | Manufacturing | 2001 |
| Peltola Heavy Cargo oy | Transport & logistics | 2021 |
| Peltola Logistics Oy | Transport & logistics | 2025 |
| Pohjavesiporaus Lukumies Oy | Construction | 1962 |
| Pohojammaa Group Oy | Transport & logistics | 2023 |
| Porpal Oy | Wholesale & retail | 1995 |
| Primus Invest Oy | Real estate | 2015 |
| Primus Rakennus Oy | Construction | 2017 |
| Protecmatic Oy | Manufacturing | 1994 |
| Puuhaukat Oy | Transport & logistics | 2019 |
| Puukasa Oy | Agriculture & fishing | 2021 |
| Puutuote Mika Mäkilä Ky | Construction | 2024 |
| Puutyöliike Lintuahot Ky | Manufacturing | 2006 |
| RRT- Verkkopalvelut Oy | Construction | 2015 |
| Rakennuspelti oy Koski Tl | Construction | 2014 |
| Rannikon Paja Oy | Manufacturing | 1983 |
| Rautanet Koski Oy | Wholesale & retail | 2005 |
| Sirweston OY | Transport & logistics | 2015 |
| SR-Motorsport Oy | Other services | 2016 |
| Saitop Oy | Other services | 2013 |
| Saneeraus ja Maalaus Vapaavuori Oy | Construction | 2007 |
| Santtion Terminaali Oy | Real estate | 2011 |
| Seciva Oy | Professional & scientific | 2011 |
| Selcotec Oy | Construction | 2016 |
| Sorvaston Koneurakointi Oy | Construction | 2014 |
| Summit Media Oy | Professional & scientific | 2008 |
| Suomen Niittysiemen Oy - Finlands Ängsfrö Ab | Wholesale & retail | 2001 |
| Sähkö-Saarinen Oy | Construction | 2026 |
| Sähköasennus Jouko Kujala Oy | Construction | 1993 |
| Sähköasennus ja -suunnittelu P. Rautiainen Oy | Construction | 2016 |
| Sähkökolmio Oy | Construction | 1989 |
| Sähkösinkitys ja mangaanifosfatointi Rehti Oy | Manufacturing | 2024 |
| TM Nostot Oy | Construction | 2021 |
| TMK-Rakenne Oy | Construction | 2011 |
| Taidekartano Johanna Oras Oy | Arts & recreation | 2011 |
| Tanelia Taina Salminen Ky | Manufacturing | 1987 |
| Tilausliikenne Hacklin Oy | Transport & logistics | 2018 |
| Tilitoimisto Noste Oy | Professional & scientific | 2007 |
| Top-Pet Oy | Arts & recreation | 1989 |
| Triotec Oy | Manufacturing | 2021 |
| Uudenmaan Huoneistosähkö Oy | Construction | 2020 |
| V-S Kestomaalaus Oy | Construction | 2019 |
| Veljekset Ahlbom Oy | Wholesale & retail | 2000 |
| Vinarin Rakennus Oy | Construction | 1999 |
| Vinyli Oy | Information & communication | 2016 |
| Välimaan tila oy | Agriculture & fishing | 2025 |
| Westas Group Oy | Agriculture & fishing | 2013 |
| Westas Raunio Oy | Manufacturing | 1957 |
| Yli-Liipolan Tila Oy | Agriculture & fishing | 2002 |