Fortum Oyj is a Finnish state-owned energy company focusing on the Nordic and Baltic countries, Poland, Russia and India. Fortum operates power plants, including co-generation plants, and generates and sells electricity and heat.

Fortum Oyj is engages in the generation, distribution, and sale of electricity and heat, as well as operation and maintenance of power plants. It operates through the following segments: Heat, Electricity Sales, and Solutions, Russia, and Power and Technology. The Heat, Electricity Sales, and Solutions segment consists of combined heat and power production as well as heat and electricity sales and development of customer-oriented solutions. The Russia segment consists of power and heat generation and sales in Russia. The Power and Technology segment consists of hydro, nuclear, thermal power generation, power solutions with expert services, portfolio management and trading, as well as technology and research and development functions. The company was founded on February 7, 1998 and is headquartered in Espoo, Finland.