Proxima Fusion raises €411 million at $2.7 billion valuation, with Google and RWE among backers

Proxima Fusion, a Germany-based energy startup building toward advanced nuclear power, said it has raised €411 million in a new round that sets its valuation at about $2.7 billion. The financing, described as coming from an investor group that includes Google and German energy heavyweight RWE, underscores how major technology and energy firms are positioning themselves around the next generation of reactor development.

The deal adds to a broader wave of activity in nuclear startups and fuel-cycle ambitions across Europe, where governments and utilities are looking for ways to reduce reliance on fossil fuels and stabilize power supply. For new reactor developers, large capital raises are often a prerequisite for moving from early-stage engineering toward long-lead procurement, licensing work, and construction readiness.

In the announcement covered by Yahoo Finance, Proxima Fusion linked the financing to its “reactor race” positioning in Europe, an implicit reference to the competitive timeline among companies pursuing next-step reactor designs. The round’s size and valuation suggest investors are betting that nuclear projects can attract capital even amid permitting complexity and long development cycles.

Google’s presence in the investor group highlights the continued expansion of big technology companies into infrastructure-adjacent bets, particularly in areas where compute and data centers depend on reliable, low-carbon electricity. RWE’s participation, meanwhile, reflects how utilities are exploring partnerships and minority or growth investments to hedge against execution risk while keeping options open on future power sources.

Proxima Fusion’s chief executive and co-founder, Francesco Sciortino, is identified in the Yahoo Finance item, but the posting does not provide extensive operational details in the text available for this review. It does not, for example, break down how the €411 million is allocated across specific program milestones, nor does it outline expected timelines for regulatory submissions, reactor siting, or construction.

The report also does not specify whether the financing includes structured components such as convertible instruments, preferred equity terms, or warrants, details that often matter for how a valuation translates into economics for existing and future shareholders. Without those terms, it is not possible to assess dilution impacts or the likelihood of follow-on rounds on a predictable schedule.

Still, a $2.7 billion valuation at this stage indicates that the company and its backers believe the core technical and commercial pathway has enough credibility to command premium interest. For investors, that typically means confidence in a reactor concept’s engineering maturity, supply-chain access, and a plan for navigating Europe’s nuclear regulatory environment.

Looking ahead, the next steps Proxima Fusion does or does not disclose will likely shape market perception: any additional clarity on project location strategy, licensing targets, or partnerships with equipment and engineering firms would be watched closely. If the company provides more granularity on how the new capital accelerates its reactor roadmap, the fundraising’s significance will be easier to judge beyond the headline valuation and investor roster.