| Kinnusen Kylmälaite Oy | Other services | 2024 |
| Kiyomiya Oy | Information & communication | 2011 |
| Kone Kiila Oy | Construction | 2022 |
| Konehuolto Erkka Marjasto Oy | Manufacturing | 1996 |
| Konepaja Hieta Oy | Manufacturing | 1987 |
| Konetekniikka A. Pirinen Oy | Manufacturing | 1977 |
| Konetyö H. Korpi Oy | Construction | 2017 |
| Kontsa media Oy | Professional & scientific | 2024 |
| Kosotek Oy | Professional & scientific | 2025 |
| Koti Kiiltäväksi Oy | Administrative & support | 2024 |
| Kotitaiturit Oy | Construction | 2020 |
| Krookantila Oy | Agriculture & fishing | 2020 |
| Kuljetus Jorma Kallio Oy | Transport & logistics | 1998 |
| Kuljetus Komeetta Ky | Transport & logistics | 2011 |
| Kuljetus Ojala Oy | Transport & logistics | 2009 |
| Kuljetus Willisi Oy | Transport & logistics | 2024 |
| Kuntosali KuntoileVille Ky | Arts & recreation | 2005 |
| Kuovin Kone Oy | Transport & logistics | 1984 |
| Kuusrahka Oy | Construction | 2012 |
| Kylmäkonehuolto Sieppi Oy | Other services | 2002 |
| LUPI Foods Oy | Manufacturing | 2026 |
| LVI-Huolto Olli Toivonen Oy | Construction | 2025 |
| LVI-Kallio Oy | Construction | 2006 |
| Laser-Salama Tekniikka Ky | Construction | 2002 |
| Liedon Lattiatyö Oy | Construction | 1995 |
| Loimaan Erä Avoin Yhtiö | Administrative & support | 2015 |
| Lykope Oy | Agriculture & fishing | 2005 |
| Lämpöpalvelu Biotherm Oy | Energy | 2005 |
| MKS Urakointi Oy | Other services | 2020 |
| MMA Holding Oy | Real estate | 2025 |
| MP-Aurantori Oy | Administrative & support | 2014 |
| MV Power Oy | Construction | 2021 |
| Maarakennus M. Mäkinen Oy | Construction | 2025 |
| Maatalous Oy Kuuskoski | Agriculture & fishing | 1981 |
| Maplemoney Oy | Financial services | 2022 |
| Mayware oy | Information & communication | 2009 |
| Menix Oy Korjaamopalvelut | Other services | 2023 |
| Mettor Oy | Arts & recreation | 2011 |
| Mielen Tuuli oy | Health & social care | 2025 |
| MäHir Group Oy | Administrative & support | 2022 |
| Mäkisen Romu Oy | Wholesale & retail | 1981 |
| Naisen unelma Oy | Wholesale & retail | 2015 |
| Natrimo Oy | Wholesale & retail | 2024 |
| Net9 Oy | Information & communication | 2014 |
| NextTek Oy | Wholesale & retail | 2025 |
| Nurmen Sora Oy | Mining & quarrying | 1989 |
| OL Aurainvest Oy | Construction | 2001 |
| Oasis Technology Oy | Professional & scientific | 2024 |
| Oninvest Oy | Financial services | 2005 |
| Onpasa Oy | Manufacturing | 2018 |
| Orimäen Konepalvelu Oy | Construction | 2026 |
| Ormos Oy | Professional & scientific | 2020 |
| Oy Ande Ab | Construction | 2009 |
| Oy SST Safety & Security Trainers Ltd | Administrative & support | 2005 |
| Palveluratkaisu Elen Oy | Administrative & support | 2023 |
| Parcolor Oy | Wholesale & retail | 2006 |
| Pelma Oy | Real estate | 2021 |
| Penho Oy | Wholesale & retail | 2026 |
| Penttilän Vilja Oy | Wholesale & retail | 1995 |
| Pienryhmäkoti Aura Oy | Health & social care | 2021 |
| Pitkäniityn Vesihuolto-osuuskunta | Water & waste | 1962 |
| Pivitek Oy | Professional & scientific | 2016 |
| Poura Oy | Agriculture & fishing | 2018 |
| Psykoraattori OY | Health & social care | 2019 |
| Punttu Oy | Wholesale & retail | 2025 |
| Puuhapuu Oy | Wholesale & retail | 2020 |
| Puusorvaamo Mäkinen Ky | Manufacturing | 1990 |
| Pyöräkunto Oy | Other services | 2021 |
| R-Villa Oy | Construction | 2018 |
| RVH Urakointi Oy | Construction | 2025 |
| Race Marketing Oy | Wholesale & retail | 2011 |
| Raision Autotarvike kommandiittiyhtiö | | 1986 |
| RakTech Fin Oy | Construction | 2021 |
| RakTek Aura Oy | Construction | 2020 |
| Rakennus M. Luoto Oy | Construction | 2012 |
| Rakennus- ja asennuspalvelu Vihu Oy | Construction | 2011 |
| Rakennushuolto Arvola Oy | Construction | 2019 |
| Rakennusliike Auralainen Oy | Construction | 2019 |
| Rakennustyöt Pulkkinen oy | Construction | 2018 |
| Ran-Pro Oy | Construction | 2008 |
| Reka Kumi Oy | Manufacturing | 1992 |
| Rikape Oy | Construction | 2002 |
| Ristiseiska Oy | Real estate | 2009 |
| Ruohosen Tila Oy | Agriculture & fishing | 2018 |
| Slope Service OY | Other services | 2017 |
| SPV Ravintolat Oy | Hospitality | 2016 |
| Saariston Marjamaa Oy | Manufacturing | 2010 |
| Saavalaisen Taksit Oy | Transport & logistics | 2020 |
| Saneeraus Joutsimies Oy | Construction | 2021 |
| Savikangas Ky | Real estate | 2003 |
| SerenusKodit Oy | Health & social care | 2010 |
| Serpens Oy | Manufacturing | 1987 |
| Sinesko Ky | Real estate | 1978 |
| Sorores Oy | Construction | 2021 |
| Sun Kiva Oy | Real estate | 2024 |
| Suomen Kateasennus Oy | Construction | 1993 |
| Suomen Megawatti Oy | Wholesale & retail | 2002 |
| Suomisen Maito Oy | Manufacturing | 1985 |
| Sähkö Aura Oy | Construction | 2004 |
| TAS-Yhtiöt Oy | Construction | 2022 |