Fortum stock heads into the open after a 1.5 percent drop

At the close on September 15, 2026, Fortum stock ended at EUR 23.68 on Nasdaq Helsinki, down 1.5 percent. The move trailed the OMX Helsinki 25, which closed at 6,445.43 after a 1.30 percent gain.

Fortum stock closed at EUR 23.68 on Nasdaq Helsinki on September 15, 2026, down 1.5 percent. The shares still reflected a sharp move linked to the Google nuclear power deal announced earlier this month.

September 15, 2026 in numbers

Fortum Corporation (ISIN FI0009007132) ended the session in Helsinki after trading as high as EUR 23.86 and as low as EUR 23.50, with volume near 2.8 million shares. The close sat below the session peak and above the day low, while the OMX Helsinki 25 finished at 6,445.43, up 1.30 percent.

As PowerOnline reported on September 15, 2026, Fortum and Google signed a 22-year power purchase agreement tied to the Loviisa nuclear plant, and the market continued to price that signal into the shares. The stock also outperformed the local benchmark by 0.20 percentage point in the session.

Today ahead of the open

Fortum has an investor webcast connected to the Google agreement on September 16, 2026, from 13:30 to 14:00 EEST, according to PowerOnline. That keeps the agreement in focus for the session ahead.