Google and RWE Lead $411 Million Round for Fusion Startup Proxima Fusion
Google has made its first European investment in fusion energy, co-leading a 411 million euro funding round for Proxima Fusion with German energy group RWE. The round values the Munich-based startup at 2.4 billion euros, according to people familiar with the matter, and marks the biggest private financing yet for a European company in the race to commercialize fusion power.
Proxima Fusion is developing a stellarator, a type of fusion reactor that uses twisted magnetic fields to contain plasma, an approach that is technically harder than the more common tokamak design but offers steadier operation. The company plans to build Europe’s first commercial fusion power plant in the early 2030s, Reuters reported, a timeline that would make it one of the first fusion companies anywhere to sell power to the grid.
The deal is notable for who is writing the checks. Google’s participation makes the search giant the latest big technology company to back frontier energy research, joining a wave of corporate investors who see fusion as a long-term answer to the power demands of AI data centers. RWE, one of Europe’s largest energy companies, brings utility expertise and a customer base that will need new sources of zero-carbon power.
The logic for the tech companies is simple. Data centers are consuming electricity at a rate that has surprised utilities, and AI training facilities in particular need dense, reliable power around the clock. Fusion, if it works, offers nearly unlimited clean energy with no carbon emissions and no reliance on weather. The prize is large enough that companies are willing to invest decades ahead of any revenue.
The financing round is also a test of whether fusion has crossed from science project to industrial proposition. The field has raised billions of dollars in recent years, with startups pursuing everything from tokamaks to laser-based approaches, and skeptics have noted that no design has yet produced more energy than it consumes. Proxima Fusion’s stellarator, built with components from an established supply chain, is among the furthest along in Europe.
The company’s approach has drawn support from researchers who say the stellarator’s steady-state operation is better suited to commercial power than the pulsed tokamak. The design was developed with input from the Max Planck Institute for Plasma Physics, one of the world’s leading fusion research centers, and Proxima Fusion has been building on decades of German fusion research.
The round’s structure reflects the maturity of the field. Existing investors increased their stakes, new industrial partners joined, and the company said the funds will support the next phase of reactor construction and the hiring of engineers and physicists. Proxima Fusion’s workforce has grown steadily, and the company says it has been recruiting from both academia and the nuclear industry.
The power sector is watching for a different reason. Utilities are under pressure to add generation capacity as electrification spreads, and they face long timelines for conventional plants and grid connections. Fusion’s promise of compact, powerful reactors that can be sited near demand is appealing to utilities that are running out of options.
The timeline remains the industry’s biggest question. Fusion has been said to be decades away for so long that the phrase has become a joke inside the field, and the startups of the current wave are trying to compress that horizon to years. Proxima Fusion’s target of the early 2030s would require the reactor to work largely as designed on the first attempts, an outcome that even its backers acknowledge is ambitious.
The European dimension matters as well. The continent has been slower than the United States and China in some areas of AI and technology investment, and European governments have been looking for ways to keep frontier research at home. Fusion is an area where Europe has genuine scientific leadership, and the Proxima Fusion round, with German and European investors at the table, keeps that advantage funded.
The round also signals a shift in how fusion companies are financed. Early fusion startups relied on venture capital and government grants, with investors betting on breakthroughs years away. The Proxima Fusion round, with its strategic investors and utility participation, looks more like the financing of an industrial company, one that expects to build things and sell them within a decade.
Proxima Fusion’s location is part of its appeal. Munich has become a hub for deep-tech startups, with universities, research institutes and a growing pool of engineers who have left the automotive industry as it restructures. The company has drawn on that talent base, and its ties to the Max Planck Institute give it access to the most advanced stellarator research in the world.
For Google, the investment is a hedge with a story attached. The company has bought wind and solar power for its data centers for years and has invested in geothermal and other emerging technologies. Fusion is the long-dated option in that portfolio: unlikely to pay off soon, but transformative if it does. For RWE, the calculus is more immediate: the company needs new generation capacity in the 2030s, and it is buying a seat at the table where that capacity might be born.
