| A-Markkinointi Oy | Wholesale & retail | 2009 |
| AM-Kuljetus Oy | Transport & logistics | 2012 |
| Ajoneuvoverhoomo TiCaBo Oy | Manufacturing | 2012 |
| Break Free Oy | Arts & recreation | 2019 |
| Doctors Ruzhe OY | Health & social care | 2022 |
| Dragonheart Productions osk | Arts & recreation | 2009 |
| Ermix Oy | Construction | 1993 |
| Eskia Oy | Administrative & support | 2021 |
| Est Welding Solutions Oy | Manufacturing | 2019 |
| Evonia Oy | Information & communication | 2007 |
| Finnec Oy | Other services | 2026 |
| Finvint Oy | Wholesale & retail | 2021 |
| Forest Santajoki Oy | Agriculture & fishing | 2013 |
| GM Geomalli Oy | Professional & scientific | 2015 |
| InfraTakkula Oy | Transport & logistics | 2014 |
| Insinööritoimisto Molari Oy | Professional & scientific | 1995 |
| Instman Group Oy | Financial services | 2023 |
| Isännöitsijätoimisto Vuori Oy | Real estate | 1986 |
| Karhuntyöt Oy | Construction | 2012 |
| Keken Kate Oy | Construction | 2008 |
| Kiinteistö Oy Kellokosken Tehtaat | Real estate | 1979 |
| Kiinteistöosakeyhtiö Purolan Kolmio | Real estate | 2006 |
| Kimmon Kiinteistöt Oy | Financial services | 1991 |
| Kivahammas Oy | Health & social care | 2012 |
| Koplaus Oy | Construction | 2018 |
| Low Bind Oy | Wholesale & retail | 2000 |
| Metalli I.N OY | Manufacturing | 2009 |
| MM Projektinhallinta Oy | Professional & scientific | 2025 |
| Mappana Oy | Wholesale & retail | 2014 |
| Metalproduct J & J Oy | Construction | 2000 |
| Mocoma Oy | Construction | 2015 |
| Neli Kax Oy | Transport & logistics | 2006 |
| NuppisKone Oy | Administrative & support | 2020 |
| Nuppulinnan Kaivuukolmio Oy | Construction | 1989 |
| Nuppulinnan Sähkötoimisto Oy | Professional & scientific | 1995 |
| Osuuskunta Kellokosken Valokuidut | Construction | 2016 |
| PK Pölytvex Oy | Construction | 2003 |
| Panssi Oy | Professional & scientific | 2023 |
| Parkettimies Oy | Construction | 2019 |
| Purolan kartano Oy | Wholesale & retail | 1985 |
| R. Liiman Kommandiittiyhtiö | Wholesale & retail | 1982 |
| Rakennus-Riola Oy | Construction | 1994 |
| Rakennustaikurit Oy | Construction | 2019 |
| Ram-Holding Oy | Construction | 2019 |
| RiKO Invest Oy | Financial services | 2018 |
| Rokmedia Oy | Information & communication | 2008 |
| RoseCon Interior Oy | Construction | 2023 |
| Saarecom Oy | Transport & logistics | 2016 |
| Soonhill Oy | Wholesale & retail | 2025 |
| Spåra Ky | Construction | 1986 |
| Tasa-Tekniikka Oy | Manufacturing | 2023 |
| Tikkurilan Rakennus-Pelti Oy | Construction | 1991 |
| Tuusulan KS-Kiinteistöt Oy | Real estate | 2007 |
| Unik Consulting Oy | Professional & scientific | 2019 |
| Unik Rakennus Oy | Construction | 2017 |
| Uudenmaan Kattotuki Oy | Construction | 2025 |
| Uudenmaan Koiraurheilu Oy | Other services | 2018 |
| Uudenmaan korjausmies Oy | Construction | 1997 |
| Valtonen & Valtonen Oy | Real estate | 2021 |
| Ventadore Oy | Professional & scientific | 2013 |
| Vinttikonttori Oy | Professional & scientific | 2001 |