| OivaUs Oy | Real estate | 2011 |
| Ostech Oy Ltd | Construction | 2007 |
| Oy Redox Ab | Manufacturing | 1990 |
| PK Muotilinja Ky | Other services | 2003 |
| Palvelupiste Suzet Ky | Other services | 2003 |
| Palvelutaksi Korpela Ky | Transport & logistics | 2008 |
| Peltisepänliike Seppo Koskinen Oy | Construction | 1994 |
| Pirtevan Herkku Oy | Hospitality | 2021 |
| Pohjois Hartolan Vesiosuuskunta | Water & waste | 2006 |
| Profilus -fysioterapiapalvelut Oy | Health & social care | 2016 |
| Puutyöpalvelu Hynninen Ky | Construction | 2004 |
| Pyöräpalvelu Kääriäinen Oy | Wholesale & retail | 2025 |
| Päijänteen Tilikeskus Oy | Professional & scientific | 1996 |
| Päijätmaan Invest Oy | Real estate | 1989 |
| Päijätmaan Talohuolto Oy | Administrative & support | 1993 |
| Päijätmaan Tili ja Kiinteistö Ky | Professional & scientific | 1981 |
| Päivi Koskela Oy | Hospitality | 2010 |
| RHS Finland Oy Ltd. | Wholesale & retail | 1989 |
| RV-Plan Oy | Manufacturing | 2011 |
| Rakennuspalvelu Jani Tonteri Oy | Construction | 2019 |
| Rakennussuunnittelu Hannu Kivinen Ky | Professional & scientific | 2005 |
| Rakennustuote H & M Laitinen Ky | Construction | 1996 |
| Rauni Salmela Oy | Other services | 1976 |
| Reijo Sertti Oy | Professional & scientific | 1993 |
| Reload Oy | Professional & scientific | 1998 |
| Restofin Kodit Oy | Construction | 2025 |
| Robio Oy | Information & communication | 2019 |
| Royal Liikenneasema Oy | Wholesale & retail | 2002 |
| SHRent Oy | Real estate | 2022 |
| SinulleAikaa Oy | Other services | 2022 |
| Soft Start Oy | Information & communication | 1979 |
| SuomiVeto Oy | Arts & recreation | 2026 |
| Sähkötex Ky | Construction | 2014 |
| Tasanen J & K Ky | Agriculture & fishing | 2002 |
| Tassu Invest Oy | Financial services | 2023 |
| Taukotupa-Korpsilta Oy | Real estate | 1994 |
| Tikkalan Sisustustyö Oy | Construction | 2022 |
| TiliWatti Mannila Oy | Energy | 2025 |
| Tilintarkastus Halmekoski Ky | Professional & scientific | 1997 |
| Tilitoimisto Tuloksesi Ky | Professional & scientific | 2011 |
| Tuomo Tuukkanen Ky | Professional & scientific | 2008 |
| USA Varaosat Koskinen Ky | Wholesale & retail | 2003 |
| Unetun hevostila Ky | Agriculture & fishing | 2014 |
| Vallesmanni Kiinteistöpalvelu Oy | Real estate | 1990 |
| Zulia Oy | Professional & scientific | 1992 |