Proxima Fusion Raises 411 Million Euros

The record-breaking funding marks an important milestone for Alpha, a demonstration plant slated to be built in Germany as a precursor to a fusion power plant.

With the successful completion of a record-breaking funding round totaling 411 million euros, Proxima Fusion has reached a crucial milestone in the implementation of the Alpha fusion demonstrator. The private funding now secured fulfills a key requirement of the Memorandum of Understanding (MoU) signed on February 26, 2026, between the Free State of Bavaria, Proxima Fusion, RWE, and the Max Planck Institute for Plasma Physics (IPP): the securing of private investment as the basis for the promised public funding from the Free State of Bavaria. Another prerequisite for the realization of Alpha is federal funding in the amount of 1.2 billion euros, which has not yet been committed.

With a company valuation of over 2.4 billion euros, Proxima Fusion is now the highest-valued and best-funded fusion company in Europe. This financing confirms international investors’ confidence in the stellarator approach and in the partners’ shared vision of realizing the Alpha demonstrator as a decisive step toward the first commercial stellarator fusion power plant in Bavaria.

The MoU signed in February calls for the construction of Alpha, a demonstration facility based on the stellarator concept, in close proximity to the IPP in Garching. There, the facility will build on the scientific findings of the large-scale Wendelstein 7-X experiment and validate key technologies for a future commercial power plant.

With the financing now finalized, the condition set forth in the memorandum-to raise a significant amount of private funding-was not only met but exceeded within just three months. This lays the groundwork for activating the planned public funds from the Free State of Bavaria for Alpha and for moving the project forward swiftly-provided the federal government commits to its share of the financing.

“The successful financing round demonstrates that our joint approach-combining scientific excellence, industrial implementation, and private capital-is convincing on an international level. It is an important step toward making Alpha a reality and decisively advancing Germany on the path to a fusion power plant based on the stellarator principle,” says Prof. Sibylle Günter, Scientific Director of the Max Planck Institute for Plasma Physics.

When the Memorandum of Understanding was signed, the IPP had already emphasized that Alpha is intended to build specifically on the scientific results of Wendelstein 7-X to advance power plant development. Unlike Wendelstein 7-X, which focuses on demonstrating continuous operation, Alpha is intended in particular to demonstrate the scaling of heat confinement and heat removal for a commercial power plant, thereby closing a significant technological gap on the path to the industrial use of fusion energy.

In the long term, Alpha will form the basis for the planned Stellaris pilot power plant, which, according to joint plans by Proxima Fusion, RWE, and the Free State of Bavaria, could be built on the site of the former Gundremmingen nuclear power plant.

With this secured funding, the public-private partnership agreed upon in February receives a decisive boost. At the same time, it underscores Germany’s leading role in stellarator research and strengthens Europe’s position in the international competition to develop commercial fusion energy.