| Kierre-Mestarit Oy | Financial services | 1987 |
| Kiinteistö A1-Palvelu Oy | Administrative & support | 1987 |
| Kiinteistö Oy Haukivuoren Hiekkaranta | Real estate | 2012 |
| Kiinteistö Oy Kimotalo | Real estate | 1996 |
| Kiinteistö Oy Kitkantaimen | Real estate | 1995 |
| Kiinteistö Oy Ojanto | Real estate | 2004 |
| Kiinteistö Oy Pressukankare | Real estate | 2004 |
| Kiinteistö Oy Ruskon Ahopellontie 9 | Real estate | 2007 |
| Kiinteistö Oy Ruskon Ahorinne | Real estate | 1990 |
| Kiinteistö Oy Ruskon Viherkulma | Real estate | 1988 |
| Kiinteistö Oy Ruskon Vuokratalot | Real estate | 2016 |
| Kiinteistö Oy Sortintie 4-6 | Real estate | 2013 |
| Kiinteistö Oy Vilho & Pekka Aho | Real estate | 1986 |
| Kiinteistöosakeyhtiö Aholantie 4 | Real estate | 2006 |
| Kiinteistöosakeyhtiö Ruskon Hopealampi | Real estate | 1995 |
| Kimitek Oy | Transport & logistics | 2019 |
| Konehuolto Leino Oy | Manufacturing | 2009 |
| Konetyö Mattila Oy | Construction | 2020 |
| Korika Oy | Manufacturing | 2010 |
| Koti - ja siivouspalvelu PaJu Oy | Administrative & support | 2020 |
| Kourukeskus Paappanen Oy | Wholesale & retail | 1990 |
| Kuljetus A Soininen Oy | Transport & logistics | 2014 |
| Kuljetusliike Törmänen Oy | Transport & logistics | 1994 |
| Kuljetuspalvelu Noutajat Ky | Transport & logistics | 1991 |
| Kyläkauppa S&T Oy | Wholesale & retail | 2017 |
| Laitehuolto Havia Oy | Manufacturing | 2014 |
| Lastenliike Miiru Virkkulainen Oy | Wholesale & retail | 2011 |
| Lavo Trading Oy | Wholesale & retail | 2010 |
| Lehtinen Invest Oy | Real estate | 2021 |
| Lehto JJ Oy | Construction | 1998 |
| Liana Bar Oy | Hospitality | 2025 |
| Lime Style Avoin yhtiö | Professional & scientific | 2012 |
| Lounais-Suomen asennuspalvelu oy | Manufacturing | 2021 |
| Loviisan Aitta Oy | Wholesale & retail | 2005 |
| Luutentti Oy | Professional & scientific | 1993 |
| Lännen Kirvestyö Oy | Administrative & support | 2012 |
| M. Santalahti Oy | Transport & logistics | 2019 |
| Meijerin Alueen Viemäriosuuskunta | Water & waste | 2012 |
| MJH-Tekniikka Oy | Wholesale & retail | 2011 |
| MOVEK Oy | Real estate | 2016 |
| MTY Lindqvist Jani ja Riku avoin yhtiö | Agriculture & fishing | 2020 |
| Makoboxi Oy | Financial services | 2020 |
| Marjasmäentien vesiosuuskunta | Water & waste | 2012 |
| MatMa Works Oy | Transport & logistics | 2025 |
| Mattila & Jussila Oy | Real estate | 2018 |
| Mehdan Oy | Professional & scientific | 2020 |
| Metsäapu Rantanen Oy | Agriculture & fishing | 2025 |
| Mountplan Oy | Manufacturing | 2013 |
| Myllymäen Broileri Oy | Agriculture & fishing | 1975 |
| Myllymäen Pehtori oy | Agriculture & fishing | 2024 |
| Myllymäen Toimitilat Oy | Real estate | 2019 |
| Mäki Ravintolat Oy | Hospitality | 2022 |
| N & H Yhtiöt Oy | Real estate | 2008 |
| NA Stable Oy | Agriculture & fishing | 2021 |
| NPK Service Oy | Transport & logistics | 2021 |
| NRtec Oy | Professional & scientific | 2024 |
| Neha Rakennus Oy | Real estate | 2021 |
| Northern Hall and Cover Finland Oy | Financial services | 2007 |
| Nortool Oy | Wholesale & retail | 1986 |
| Nuverco Oy | Professional & scientific | 2016 |
| Näkyvä Group Oy | Transport & logistics | 2014 |
| OMT-Tank Oy | Other services | 2007 |
| Oy Hembo Ab | Real estate | 2022 |
| Oy Master Star Capital Ltd | Construction | 2007 |
| Oy Nordens Valo-smycken Ab | Wholesale & retail | 1994 |
| Oy STV Suomen Talon Visio Ltd | Construction | 2020 |
| Oy VAG Holding Ltd | Construction | 1991 |
| P & V Asennus Oy | Manufacturing | 2017 |
| PH Asennus Oy | Manufacturing | 2020 |
| Paineilmahuolto A. Suomilammi Oy | Financial services | 1993 |
| Pesukomppania Oy | Other services | 1993 |
| Pihamarket Oy | Wholesale & retail | 2024 |
| Pihatyömyyrät Oy | Administrative & support | 2020 |
| Pihlajan Sora Oy | Transport & logistics | 2022 |
| Pirmala Oy | Professional & scientific | 1989 |
| Pitopalvelu Mattila Oy | Hospitality | 2025 |
| Poritix Oy | Manufacturing | 2008 |
| PortFin Oy | Manufacturing | 2016 |
| PsyDent Oy | Health & social care | 2023 |
| Putki-Mäki Oy | Construction | 1998 |
| Puusisu Koti Oy | Construction | 2025 |
| Qualidea Oy | Professional & scientific | 2024 |
| Ro-Market OY | Wholesale & retail | 2026 |
| ROK Racing Performance Oy | Wholesale & retail | 2022 |
| RTI Shipbuilding oy | Manufacturing | 2018 |
| Ruskon Kiinteistöhuolto OY | Administrative & support | 2019 |
| RVA Group Oy | Financial services | 2023 |
| Racing KPH Team Oy | Arts & recreation | 2016 |
| Raihaka Oy | Construction | 2010 |
| Raision Proauto Ky | Wholesale & retail | 2012 |
| Rakenne Kasari Oy | Construction | 2006 |
| Rakennus Jumire Oy | Construction | 2015 |
| Rakennus Kurre Oy | Construction | 1990 |
| Rakennus Omega Oy | Real estate | 2018 |
| Rakennus Revel Oy | Construction | 2022 |
| Rakennushuolto Aho Oy | Construction | 1982 |
| Rakennusliike K. Hämäläinen Oy | Construction | 1996 |
| Rakennusliike Velo Oy | Wholesale & retail | 2015 |
| Rakennusrestaurointi Ali-Keskikylä Oy | Construction | 2020 |
| Rasessi Group Oy | Construction | 2024 |