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Google and RWE back fusion startup Proxima Energy in record €411m funding round

Reported by Businessgreen
Jul 7, 2026· 3 min read
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Key Takeaways
  • • Proxima Fusion raised €411 million ($469 million) in a financing round led by XTX Ventures and East X Ventures, with strategic investments from Google and RWE, valuing the Munich-based magnetic fusion startup at approximately €2.4 billion ($2.7 billion).
  • • This financing round represents a record capital deployment in European fusion technology, significantly exceeding Proxima's previous Series A round of €130 million announced earlier, bringing total funding to over €185 million before this latest round.
  • • Google and RWE's participation signals major technology and energy sector confidence in Proxima's stellarator-based fusion approach, with RWE expanding its initial investment stake in the company.
  • • Proxima Fusion, a spin-out from the Max Planck Institute for Plasma Physics, is developing magnetic fusion technology targeting deployment of the world's first commercial fusion power plant.
  • • The funding demonstrates accelerating institutional and strategic investor appetite for fusion energy solutions as part of the broader energy transition, with multiple European public and private capital sources backing the venture.
Summary
Proxima Fusion, a Munich-based magnetic fusion startup, has secured €411 million ($469 million) in a landmark financing round, substantially elevating its position as Europe's leading fusion energy developer. The round was led by venture capital firms XTX Ventures and East X Ventures, with strategic co-investments from technology giant Google and German utility RWE, positioning the company at a valuation of approximately €2.4 billion ($2.7 billion).

This latest capital deployment represents a significant acceleration in Proxima's funding trajectory. The company, which is a spin-out from the prestigious Max Planck Institute for Plasma Physics, previously raised €130 million in a Series A funding round led by Berlin-based Cherry Ventures and London-headquartered Balderton Capital, bringing cumulative total funding to over €185 million before this latest injection. The €411 million round substantially exceeds prior capital raises and underscores rapidly intensifying investor confidence in the company's stellarator-based fusion technology.

The participation of Google and RWE carries particular strategic significance. RWE, one of Europe's largest energy companies, expanded its initial investment stake in Proxima, signaling commitment from a major utility operator to support the commercialization pathway for fusion energy. Google's investment reflects the technology sector's increasing focus on fusion as a potential solution for meeting long-term energy demands associated with artificial intelligence infrastructure and data center operations. The involvement of both strategic and financial investors indicates validation across multiple sectors regarding Proxima's technical approach and commercial viability.

Proxima Fusion is focused on developing magnetic confinement fusion technology with the objective of deploying the world's first commercial fusion power plant. The company's funding trajectory, combined with earlier support from German public investment vehicles including the DeepTech & Climate Fonds and High-Tech Gründerfonds (both backed by the German Ministry of Economics and Energy), demonstrates sustained institutional and governmental backing for fusion development. The €411 million round reflects the broader momentum in European energy transition investment, positioning Proxima as a focal point for institutional capital seeking exposure to next-generation power generation technologies.

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Businessgreen Google and RWE back fusion startup Proxima Energy in record €411m funding round