Fortum stock heads into the open after a double-digit jump
Published on 09/21/2026 at 08:09 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Fortum stock closed sharply higher on Nasdaq Helsinki on September 18, 2026, ending the session with a double-digit percent gain in euros after news of a long-term nuclear power purchase agreement with Google. Compared with the broader STOXX Europe 600 index, which recorded a far smaller move that day, the stock outperformed markedly on both price change and trading volume.
September 18, 2026 in numbers
Fortum Oyj (ISIN FI0009007132) saw its shares jump as much as 15.5% during the September 18, 2026 session, with the close reflecting a similar double-digit percent advance on Nasdaq Helsinki and a wide intraday range between the day low and day high in euros. According to Yahoo Finance, the agreement with Alphabet subsidiary Google marked Fortum's first nuclear energy deal outside the United States and triggered the stock's biggest gain among major European utilities that day. The session was accompanied by significantly elevated trading volume compared with earlier in the week, as investors reacted to the prospect of long-term contracted revenues from the Loviisa nuclear power plant through 2050. The strong move left the closing price noticeably closer to the upper end of the stock's 52-week range, narrowing the gap to the 52-week high in euros and underscoring how material the market viewed the announcement.
Outlook for today
Today, attention around Fortum centers on follow-up commentary to the nuclear power purchase agreement with Google, as the multidecade deal is expected to shape perceptions of Fortum's future cash flows and capital allocation. As ANS reported on September 20, 2026, the agreement will provide Google with nuclear-generated power from the Loviisa plant through 2050, giving Fortum a long-term off-take partner and drawing wider investor focus to European nuclear assets. In the broader market, developments in European utility and clean-energy stocks, as well as any updates from major central banks or energy policy discussions, can influence Fortum today because the company is seen as exposed to both power price dynamics and regulatory frameworks.
