Ensto is a family business and an international cleantech company founded by Ensio Miettinen in 1958. The ownership of the company was transferred to the next generation of the Miettinen family in 2001. The current owners are Marjo Miettinen, Anu Miettinen, Taru Kokkomäki and Timo Miettinen. The third generation is also about to enter to the business.
Ensto is part of EM Group which is owned by the Miettinen family. EM Group is a Finnish family-owned business, which concentrates in owning and developing international enterprises and real estate.