The largest electricity producers in Finland are Fortum, the state energy company, Pohjolan Voima, the energy company owned by major industries, Teollisuuden Voima, the industry-owned nuclear power company, Helsingin Energia, the power company of Helsinki City, and Vattenfall, the largest energy company of Sweden. There are also a large number of small and medium-sized local energy companies. A special feature of the Finnish electricity markets is companies like Pohjolan Voima and Teollisuuden Voima that operate with the Mankala-principle. That is, they do not pay dividends, but rather provide power to their owners without seeking profit.
