Seppo Erik Ruohonen

Kemijoki Oy generates hydroelectric power. The company also provides maintenance, wind power, channel mapping and dam safety services. It owns twenty hydropower plants, sixteen which are located on the river Kemijoki watercourse, two on the Lieksanjoki river and two on the Kymijoki river. Kemijoki was founded in 1954 and is headquartered in Rovaniemi, Finland.

Teollisuuden Voima Oyj produces electricity from nuclear power. It provides services to industrial and energy companies. The company was founded on January 23, 1969 and is headquartered in Eurajoki, Finland.

Helen Oy engages in the production and sales of electricity. It also provides district heating and cooling, as well as energy transmission and distribution services. The company was founded in 1909 and is headquartered in Helsinki, Finland.

Suomen Energia-Urakointi Oy provides electronic community technology solutions. It offers design, installation, operation, and data transmission services in networks, and equipment related to electricity transmission, distribution, and use. The company was founded in 1998 and is headquartered in Helsinki, Finland.

Pohjolan Voima Oy provides electricity generation services. It produces hydro, nuclear and thermal power. The company generates electricity with water, uranium, wood, peat, agro biomass, recovered fuels, coal, natural gas, and oil. Pohjolan Voima was founded in 1943 and is headquartered in Helsinki, Finland.