Fortum stock gains attention as Swedish nuclear aid bid supports long-term growth

Fortum stock (ISIN FI0009007132) is back in focus for energy investors as the Finnish utility’s Swedish project company seeks state aid to support up to 3.4 GWe of new nuclear capacity at the Oskarshamn site, a move highlighted on September 2, 2026.

State aid move for Swedish nuclear capacity

According to a report from Nuclear Engineering International, Fortum-owned project company NuCore Energi has submitted a state aid application to the Swedish government to initiate discussions on the framework and conditions for a new nuclear power project in Oskarshamn, dated September 2, 2026.

The application aims to support the development of up to 3.4 gigawatts of new nuclear capacity adjacent to the existing Oskarshamn nuclear site, creating a potential multi-reactor program that would materially expand Fortum’s baseload generation portfolio in Sweden if realized.

Fortum’s nuclear strategy and technology options

The current move builds on Fortum’s broader strategic push into new nuclear technologies in the Nordic region. As described by an Energy Intelligence interview published September 2, 2026, Fortum concluded a two-year feasibility study on new nuclear in 2025 and down-selected three technologies for potential newbuilds in Finland and Sweden: GE Vernova Hitachi’s BWRX-300, EDF’s EPR and Westinghouse’s AP1000.

This portfolio approach gives Fortum flexibility to match reactor designs to site conditions and regulatory frameworks. The Swedish Oskarshamn plan, with up to 3.4 GWe of new capacity, could involve a combination of large reactors such as EPR or AP1000 and potentially smaller units like the BWRX-300, depending on permitting and economics.

From an investor perspective, the application for state aid is a long-term catalyst rather than an immediate earnings driver. It signals that Fortum is prepared to commit capital and engineering resources to large-scale nuclear expansion, contingent on stable policy support and risk-sharing mechanisms with the Swedish state.

Nuclear expansion in the wider European context

The NuCore Energi initiative also fits into a wider European trend of renewed interest in nuclear power as a low-carbon baseload source. World Nuclear News notes that NuCore Energi, a subsidiary of Fortum, has submitted an application to the Swedish government for state support for new nuclear generating capacity adjacent to the existing Oskarshamn site, emphasizing the scale of the project at up to 3.4 GWe.

In the Nordic power market, additional nuclear capacity could help stabilize wholesale electricity prices and reduce reliance on imported fossil fuels, which in turn may support Fortum’s long-term cash flows from generation and trading activities. For shareholders, the key question is whether regulatory and financing frameworks will allow Fortum to earn returns commensurate with the capital intensity of nuclear projects.

While the state aid application itself does not include detailed financial figures, the prospect of several gigawatts of new capacity suggests investment volumes in the multi-billion-euro range over the coming decade, placing nuclear at the center of Fortum’s strategic narrative alongside hydropower and other low-carbon assets.

Representative product: Fortum’s retail energy services

Beyond large-scale generation, Fortum also operates retail and customer-facing energy services, such as comprehensive electricity supply and related solutions for households and businesses in Finland and other Nordic countries. These offerings typically include fixed-price contracts, dynamic tariffs linked to spot power prices, and digital tools to help customers manage consumption, all contributing to Fortum’s recurring revenue base from the retail segment.

Stock level and investor view

As of early September 2026, Fortum stock trades on the Helsinki exchange under the ticker FORTUM.HE in euros, with recent market data indicating a price level around the low-20-euro range and a modest daily percent change, while the share remains within its established 52-week trading corridor. For investors, the combination of stable regulated and contracted revenues with optionality from future nuclear growth in Sweden and Finland is a central part of the investment case.