FORTUM CORPORATION STOCK EXCHANGE RELEASE 31 OCTOBER 2025 AT 17:45 EET

Notification type: INITIAL NOTIFICATION

Reference number: 635400IUIZZIUJSAMF76_20251031103348_365

Ingela Ulfves, Vice President, Investor Relations and Financial Communications, tel. +358 40 5151 531

Fortum

Fortum is a Nordic energy company. We generate and deliver reliable energy to our customers and the Nordic energy system while at the same time helping industries decarbonise their processes and grow. Our core operations comprise efficient and best-in-class low-carbon power generation, customer services, and heating and cooling. Fortum's power generation is already 99% from renewable or nuclear sources with one of the lowest specific CO2-emissions in Europe. We are guided by our ambitious SBTi-validated emission reduction targets on our way towards net-zero by 2040. For our ~4,500 employees, we commit to be a safe and inspiring workplace. Fortum's share is listed on Nasdaq Helsinki. fortum.com