Market position

Fortum is the third-largest power generator in the Nordics and its power generation has one of the lowest specific CO₂ emissions in Europe. In 2025, roughly 83% of the Group’s comparable EBITDA originated from the company’s Nordic outright power generation, which is mostly based on flexible hydro and baseload nuclear power, complemented by onshore wind based power generation. Fortum’s total power generation in 2025 was 42.3 TWh. 

Fortum is also the largest electricity retailer in the Nordics with 2.0 million customers representing a market share of 12%. Furthermore, Fortum has district heating and cooling business in Finland and Poland. In 2025, Fortum produced 3.2 TWh of heat mainly from energy-efficient combined heat and power (CHP) plants. In addition, Fortum has electricity and gas retail business in Poland.