Google has thrown its weight behind Proxima Fusion, joining German utility RWE in a record €411 million ($468 million) funding round that values the Munich-based startup at roughly €2.4 billion. Announced on July 7, 2026 and reported by Reuters, Bloomberg, and Sifted, the round marks the largest-ever private investment in European fusion — and a pointed bet by the world's biggest buyer of AI compute that the long-promised technology of fusion power may finally be within reach.
The deal is notable not only for its size but for its strategic logic. Google, whose data centers underpin its Gemini AI models and a vast cloud business, has made securing abundant clean electricity a corporate priority as artificial-intelligence workloads drive an unprecedented surge in power demand. Backing a fusion startup is the most ambitious expression of that search to date. For more context on this story, see our ongoing more AI stories.
Europe's largest fusion bet
According to ESG Today, the €411 million round establishes Proxima as the best-funded fusion company in Europe, with the financing valuing the business at nearly €2.5 billion. The round was led by XTX Ventures and East X Ventures, and drew a broad syndicate including KfW Capital, SPRIND, Burda Principal Investments, and returning backers such as Balderton, Cherry Ventures, DST Global Partners, Lightspeed, and the European Innovation Council Fund.
Proxima is pursuing a design known as a stellarator, a notoriously complex but potentially more stable approach to fusion than the tokamak used by most competitors. The company is one of several racing to demonstrate that fusion — the process that powers the sun — can be harnessed commercially on Earth.
"Europe is racing with the United States and China to get to the first fusion power plant," Proxima chief executive Francesco Sciortino said. "Proxima's financing demonstrates that Europe can not only invent breakthrough technologies, but also build globally competitive companies around them."
From demonstrator to power plant
The new capital is earmarked for Proxima's next major milestone: Alpha, a net-energy stellarator demonstrator planned near Munich and targeted for completion in the early 2030s. Alpha is intended to bridge the gap between fusion research and commercial deployment, paving the way for Stellaris, the company's first commercial stellarator power plant, later in the decade.
Proxima has also lined up a site for its eventual commercial plant. RWE, the German utility that joined the round, has agreed to partner on building the first stellarator power station on the grounds of a former nuclear fission plant in Gundremmingen, Bavaria — repurposing the infrastructure of the atomic age for what Proxima hopes will be its successor. Sciortino framed the investor enthusiasm as recognition of "both the urgency and the opportunity" of developing a generational energy technology.
Why an AI company is investing in fusion
Google's involvement is the detail that ties the round to the broader technology landscape. Tech Funding News reported that the investment is Google's first in a European fusion company, extending a strategy in which the search giant has backed a portfolio of advanced energy startups in hopes of eventually powering its data centers with carbon-free electricity.
The motivation is sharpened by AI. Training and running large language models requires enormous amounts of electricity, and analysts have warned that demand from data centers could soon strain grids around the world. Google, which has pledged to run on carbon-free energy around the clock, has explored geothermal, next-generation nuclear, and battery technologies; fusion represents the highest-risk, highest-reward frontier in that portfolio.
Fusion, if it works at scale, promises something no other clean source can reliably deliver: vast, continuous, emissions-free power without the long-lived radioactive waste of conventional nuclear plants. For a company whose AI ambitions are increasingly gated by access to electricity, that prospect is worth backing even on a decade-long timeline.
A three-way race
The financing also underscores an emerging geopolitical competition. Startups in the United States, supported by billions in private capital and favorable policy, and state-backed programs in China are pursuing fusion alongside European efforts. Sciortino's framing of a race among the three reflects a growing consensus that whichever region demonstrates a viable commercial fusion plant first could gain a durable advantage in energy-intensive industries — artificial intelligence chief among them.
Significant hurdles remain. No private company has yet produced a fusion power plant that generates electricity competitively, and timelines measured in decades mean that fusion will do nothing to ease AI's near-term power crunch. Critics note that the technology has famously been "thirty years away" for generations.
A long-odds hedge on the future
For Google, the Proxima investment is best understood as a hedge — a relatively small bet, against the scale of its overall spending, on an outcome that could reshape the economics of computing if it succeeds. For Proxima, the backing of one of the world's most resourceful technology companies lends credibility and capital at a critical stage.
And for the AI industry at large, the round is a reminder that the limits on artificial intelligence are increasingly less about algorithms and chips than about electrons. Whoever solves the energy problem — whether through fusion, advanced nuclear, or some other source — will shape how much intelligence the world's data centers can ultimately deliver.
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